Need help to understand system calls

Nitisha Jain nitishajain15 at gmail.com
Tue Jul 16 03:48:13 EDT 2013


Hello all,

I am running the Iozone benchmark commands to find disk characteristics on
my system and
trying to construct a call graph for the iozone functions.
I am using perf tools to generate a call graph , but I am having trouble
understanding the output from the perf commands as follows--


# Events: 62K cpu-clock
#
# Overhead         Command               Shared
Object
Symbol
# ........  ..............  ..........................
..............................................................................................................................
#
    79.23%         swapper  [kernel.kallsyms]           [k] native_safe_halt
                   |
                   --- native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     4.99%          iozone  [kernel.kallsyms]           [k]
copy_user_generic_unrolled
                    |
                    --- copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel


I need to understand these kernel commands , kindly give some pointers for
the same. Are there any resources available online ??
I am attaching the complete file along with the mail.


Thanks and regards,

*Nitisha*
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# Events: 62K cpu-clock
#
# Overhead         Command               Shared Object                                                                                                                          Symbol
# ........  ..............  ..........................  ..............................................................................................................................
#
    79.23%         swapper  [kernel.kallsyms]           [k] native_safe_halt
                   |
                   --- native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     4.99%          iozone  [kernel.kallsyms]           [k] copy_user_generic_unrolled
                    |
                    --- copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret	
                        0xf77904be
                        __write_nocancel

     2.58%         swapper  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                   |
                   --- _raw_spin_unlock_irqrestore
                      |          
                      |--73.33%-- ata_scsi_queuecmd
                      |          scsi_dispatch_cmd
                      |          scsi_request_fn
                      |          |          
                      |          |--99.83%-- blk_run_queue
                      |          |          scsi_run_queue
                      |          |          scsi_next_command
                      |          |          scsi_io_completion
                      |          |          blk_done_softirq
                      |          |          __do_softirq
                      |          |          call_softirq
                      |          |          do_softirq
                      |          |          irq_exit
                      |          |          |          
                      |          |          |--96.37%-- do_IRQ
                      |          |          |          ret_from_intr
                      |          |          |          |          
                      |          |          |          |--99.65%-- native_safe_halt
                      |          |          |          |          default_idle
                      |          |          |          |          cpu_idle
                      |          |          |          |          start_kernel
                      |          |          |          |          x86_64_start_kernel
                      |          |          |           --0.35%-- [...]
                      |          |          |          
                      |          |           --3.63%-- smp_apic_timer_interrupt
                      |          |                     apic_timer_interrupt
                      |          |                     native_safe_halt
                      |          |                     default_idle
                      |          |                     cpu_idle
                      |          |                     start_kernel
                      |          |                     x86_64_start_kernel
                      |           --0.17%-- [...]
                      |          
                      |--15.62%-- try_to_wake_up
                      |          call_timer_fn
                      |          run_timer_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--99.21%-- smp_apic_timer_interrupt
                      |          |          apic_timer_interrupt
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --0.79%-- do_IRQ
                      |                     ret_from_intr
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--6.73%-- test_clear_page_writeback
                      |          end_page_writeback
                      |          put_io_page
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--87.16%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --12.84%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--1.36%-- blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--90.91%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --9.09%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--1.23%-- __rcu_process_callbacks
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--95.00%-- smp_apic_timer_interrupt
                      |          |          apic_timer_interrupt
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --5.00%-- do_IRQ
                      |                     ret_from_intr
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--0.86%-- call_timer_fn
                      |          run_timer_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          smp_apic_timer_interrupt
                      |          apic_timer_interrupt
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                       --0.86%-- [...]

     0.79%         swapper  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                   |
                   --- _raw_spin_unlock_irq
                      |          
                      |--60.81%-- run_timer_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--99.67%-- smp_apic_timer_interrupt
                      |          |          apic_timer_interrupt
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |           --0.33%-- [...]
                      |          
                      |--25.86%-- finish_task_switch
                      |          thread_return
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --13.33%-- scsi_request_fn
                                 blk_run_queue
                                 scsi_run_queue
                                 scsi_next_command
                                 scsi_io_completion
                                 blk_done_softirq
                                 __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 |          
                                 |--98.48%-- do_IRQ
                                 |          ret_from_intr
                                 |          native_safe_halt
                                 |          default_idle
                                 |          cpu_idle
                                 |          start_kernel
                                 |          x86_64_start_kernel
                                 |          
                                  --1.52%-- smp_apic_timer_interrupt
                                            apic_timer_interrupt
                                            native_safe_halt
                                            default_idle
                                            cpu_idle
                                            start_kernel
                                            x86_64_start_kernel

     0.77%         swapper  [kernel.kallsyms]           [k] __do_softirq
                   |
                   --- __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--88.22%-- do_IRQ
                      |          ret_from_intr
                      |          |          
                      |          |--99.77%-- native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |           --0.23%-- [...]
                      |          
                       --11.78%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.58%          iozone  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                    |
                    --- _raw_spin_unlock_irqrestore
                       |          
                       |--61.31%-- ata_scsi_queuecmd
                       |          scsi_dispatch_cmd
                       |          scsi_request_fn
                       |          |          
                       |          |--98.67%-- blk_run_queue
                       |          |          scsi_run_queue
                       |          |          scsi_next_command
                       |          |          scsi_io_completion
                       |          |          blk_done_softirq
                       |          |          __do_softirq
                       |          |          call_softirq
                       |          |          do_softirq
                       |          |          irq_exit
                       |          |          |          
                       |          |          |--94.14%-- do_IRQ
                       |          |          |          ret_from_intr
                       |          |          |          |          
                       |          |          |          |--55.98%-- copy_user_generic_unrolled
                       |          |          |          |          iov_iter_copy_from_user_atomic
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--4.31%-- get_page_from_freelist
                       |          |          |          |          __alloc_pages_nodemask
                       |          |          |          |          alloc_pages_current
                       |          |          |          |          grab_cache_page_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--4.31%-- _raw_spin_unlock_irq
                       |          |          |          |          |          
                       |          |          |          |          |--55.56%-- __set_page_dirty
                       |          |          |          |          |          __block_commit_write.isra.22
                       |          |          |          |          |          block_write_end
                       |          |          |          |          |          generic_write_end
                       |          |          |          |          |          ext4_da_write_end
                       |          |          |          |          |          generic_perform_write
                       |          |          |          |          |          generic_file_buffered_write
                       |          |          |          |          |          __generic_file_aio_write
                       |          |          |          |          |          generic_file_aio_write
                       |          |          |          |          |          ext4_file_write
                       |          |          |          |          |          do_sync_write
                       |          |          |          |          |          vfs_write
                       |          |          |          |          |          sys_write
                       |          |          |          |          |          ia32_sysret
                       |          |          |          |          |          0xf77904be
                       |          |          |          |          |          __write_nocancel
                       |          |          |          |          |          
                       |          |          |          |           --44.44%-- add_to_page_cache_locked.part.29
                       |          |          |          |                     add_to_page_cache_lru
                       |          |          |          |                     grab_cache_page_write_begin
                       |          |          |          |                     ext4_da_write_begin
                       |          |          |          |                     generic_perform_write
                       |          |          |          |                     generic_file_buffered_write
                       |          |          |          |                     __generic_file_aio_write
                       |          |          |          |                     generic_file_aio_write
                       |          |          |          |                     ext4_file_write
                       |          |          |          |                     do_sync_write
                       |          |          |          |                     vfs_write
                       |          |          |          |                     sys_write
                       |          |          |          |                     ia32_sysret
                       |          |          |          |                     0xf77904be
                       |          |          |          |                     __write_nocancel
                       |          |          |          |          
                       |          |          |          |--3.83%-- iov_iter_fault_in_readable
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--2.39%-- __wake_up_bit
                       |          |          |          |          generic_write_end
                       |          |          |          |          ext4_da_write_end
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.91%-- __mem_cgroup_commit_charge
                       |          |          |          |          __mem_cgroup_commit_charge_lrucare
                       |          |          |          |          mem_cgroup_cache_charge
                       |          |          |          |          add_to_page_cache_locked
                       |          |          |          |          add_to_page_cache_lru
                       |          |          |          |          grab_cache_page_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.91%-- alloc_buffer_head
                       |          |          |          |          alloc_page_buffers
                       |          |          |          |          create_empty_buffers
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.91%-- lookup_bh_lru
                       |          |          |          |          __find_get_block
                       |          |          |          |          __getblk
                       |          |          |          |          |          
                       |          |          |          |          |--50.00%-- __ext4_get_inode_loc
                       |          |          |          |          |          ext4_reserve_inode_write
                       |          |          |          |          |          ext4_mark_inode_dirty
                       |          |          |          |          |          ext4_dirty_inode
                       |          |          |          |          |          __mark_inode_dirty
                       |          |          |          |          |          generic_write_end
                       |          |          |          |          |          ext4_da_write_end
                       |          |          |          |          |          generic_perform_write
                       |          |          |          |          |          generic_file_buffered_write
                       |          |          |          |          |          __generic_file_aio_write
                       |          |          |          |          |          generic_file_aio_write
                       |          |          |          |          |          ext4_file_write
                       |          |          |          |          |          do_sync_write
                       |          |          |          |          |          vfs_write
                       |          |          |          |          |          sys_write
                       |          |          |          |          |          ia32_sysret
                       |          |          |          |          |          0xf77904be
                       |          |          |          |          |          __write_nocancel
                       |          |          |          |          |          
                       |          |          |          |           --50.00%-- ext4_get_branch
                       |          |          |          |                     ext4_ind_map_blocks
                       |          |          |          |                     ext4_map_blocks
                       |          |          |          |                     ext4_da_get_block_prep
                       |          |          |          |                     __block_write_begin
                       |          |          |          |                     ext4_da_write_begin
                       |          |          |          |                     generic_perform_write
                       |          |          |          |                     generic_file_buffered_write
                       |          |          |          |                     __generic_file_aio_write
                       |          |          |          |                     generic_file_aio_write
                       |          |          |          |                     ext4_file_write
                       |          |          |          |                     do_sync_write
                       |          |          |          |                     vfs_write
                       |          |          |          |                     sys_write
                       |          |          |          |                     ia32_sysret
                       |          |          |          |                     0xf77904be
                       |          |          |          |                     __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.44%-- __mark_inode_dirty
                       |          |          |          |          __block_commit_write.isra.22
                       |          |          |          |          block_write_end
                       |          |          |          |          generic_write_end
                       |          |          |          |          ext4_da_write_end
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.44%-- kmem_cache_alloc
                       |          |          |          |          alloc_buffer_head
                       |          |          |          |          alloc_page_buffers
                       |          |          |          |          create_empty_buffers
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.44%-- __rcu_read_unlock
                       |          |          |          |          __mem_cgroup_try_charge
                       |          |          |          |          mem_cgroup_cache_charge
                       |          |          |          |          add_to_page_cache_locked
                       |          |          |          |          add_to_page_cache_lru
                       |          |          |          |          grab_cache_page_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.44%-- mark_buffer_dirty
                       |          |          |          |          |          
                       |          |          |          |          |--66.67%-- __ext4_handle_dirty_metadata
                       |          |          |          |          |          ext4_do_update_inode
                       |          |          |          |          |          ext4_mark_iloc_dirty
                       |          |          |          |          |          ext4_mark_inode_dirty
                       |          |          |          |          |          ext4_dirty_inode
                       |          |          |          |          |          __mark_inode_dirty
                       |          |          |          |          |          generic_write_end
                       |          |          |          |          |          ext4_da_write_end
                       |          |          |          |          |          generic_perform_write
                       |          |          |          |          |          generic_file_buffered_write
                       |          |          |          |          |          __generic_file_aio_write
                       |          |          |          |          |          generic_file_aio_write
                       |          |          |          |          |          ext4_file_write
                       |          |          |          |          |          do_sync_write
                       |          |          |          |          |          vfs_write
                       |          |          |          |          |          sys_write
                       |          |          |          |          |          ia32_sysret
                       |          |          |          |          |          0xf77904be
                       |          |          |          |          |          __write_nocancel
                       |          |          |          |          |          
                       |          |          |          |           --33.33%-- __block_commit_write.isra.22
                       |          |          |          |                     block_write_end
                       |          |          |          |                     generic_write_end
                       |          |          |          |                     ext4_da_write_end
                       |          |          |          |                     generic_perform_write
                       |          |          |          |                     generic_file_buffered_write
                       |          |          |          |                     __generic_file_aio_write
                       |          |          |          |                     generic_file_aio_write
                       |          |          |          |                     ext4_file_write
                       |          |          |          |                     do_sync_write
                       |          |          |          |                     vfs_write
                       |          |          |          |                     sys_write
                       |          |          |          |                     ia32_sysret
                       |          |          |          |                     0xf77904be
                       |          |          |          |                     __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- __ext4_get_inode_loc
                       |          |          |          |          ext4_reserve_inode_write
                       |          |          |          |          ext4_mark_inode_dirty
                       |          |          |          |          ext4_dirty_inode
                       |          |          |          |          __mark_inode_dirty
                       |          |          |          |          generic_write_end
                       |          |          |          |          ext4_da_write_end
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- ext4_da_reserve_space
                       |          |          |          |          ext4_da_get_block_prep
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- _raw_spin_unlock_irqrestore
                       |          |          |          |          pagevec_lru_move_fn
                       |          |          |          |          __lru_cache_add
                       |          |          |          |          add_to_page_cache_lru
                       |          |          |          |          grab_cache_page_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- ext4_get_branch
                       |          |          |          |          ext4_ind_map_blocks
                       |          |          |          |          ext4_map_blocks
                       |          |          |          |          ext4_da_get_block_prep
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- alloc_page_buffers
                       |          |          |          |          create_empty_buffers
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |           --11.96%-- [...]
                       |          |          |          
                       |          |           --5.86%-- smp_apic_timer_interrupt
                       |          |                     apic_timer_interrupt
                       |          |                     |          
                       |          |                     |--53.85%-- copy_user_generic_unrolled
                       |          |                     |          iov_iter_copy_from_user_atomic
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- _raw_spin_unlock_irq
                       |          |                     |          __set_page_dirty
                       |          |                     |          __block_commit_write.isra.22
                       |          |                     |          block_write_end
                       |          |                     |          generic_write_end
                       |          |                     |          ext4_da_write_end
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- __mem_cgroup_try_charge
                       |          |                     |          mem_cgroup_cache_charge
                       |          |                     |          add_to_page_cache_locked
                       |          |                     |          add_to_page_cache_lru
                       |          |                     |          grab_cache_page_write_begin
                       |          |                     |          ext4_da_write_begin
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- __page_cache_alloc
                       |          |                     |          grab_cache_page_write_begin
                       |          |                     |          ext4_da_write_begin
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- ext4_dirty_inode
                       |          |                     |          __mark_inode_dirty
                       |          |                     |          generic_write_end
                       |          |                     |          ext4_da_write_end
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- get_page_from_freelist
                       |          |                     |          __alloc_pages_nodemask
                       |          |                     |          alloc_pages_current
                       |          |                     |          grab_cache_page_write_begin
                       |          |                     |          ext4_da_write_begin
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                      --7.69%-- 0xf77904be
                       |          |                                __write_nocancel
                       |          |                                0x8057120
                       |          |                                0x805771a
                       |          |                                0x80928e6
                       |          |                                __libc_start_main
                       |          |          
                       |          |--0.89%-- blk_flush_plug_list
                       |          |          |          
                       |          |          |--50.00%-- blk_finish_plug
                       |          |          |          read_pages
                       |          |          |          __do_page_cache_readahead
                       |          |          |          ra_submit
                       |          |          |          filemap_fault
                       |          |          |          __do_fault
                       |          |          |          handle_pte_fault
                       |          |          |          do_page_fault
                       |          |          |          page_fault
                       |          |          |          0xf77c3595
                       |          |          |          _dl_map_object_from_fd
                       |          |          |          _dl_map_object
                       |          |          |          
                       |          |           --50.00%-- io_schedule
                       |          |                     sleep_on_buffer
                       |          |                     __wait_on_bit
                       |          |                     out_of_line_wait_on_bit
                       |          |                     bh_submit_read
                       |          |                     ext4_get_branch
                       |          |                     ext4_ind_map_blocks
                       |          |                     ext4_map_blocks
                       |          |                     _ext4_get_block
                       |          |                     do_mpage_readpage
                       |          |                     mpage_readpages
                       |          |                     read_pages
                       |          |                     __do_page_cache_readahead
                       |          |                     ra_submit
                       |          |                     filemap_fault
                       |          |                     __do_fault
                       |          |                     handle_pte_fault
                       |          |                     do_page_fault
                       |          |                     page_fault
                       |          |                     0xf778ae42
                       |          |                     __i686.get_pc_thunk.cx
                       |          |                     0x8057120
                       |          |                     0x805771a
                       |          |                     0x80928e6
                       |          |                     __libc_start_main
                       |           --0.44%-- [...]
                       |          
                       |--25.34%-- pagevec_lru_move_fn
                       |          __lru_cache_add
                       |          |          
                       |          |--98.92%-- add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --1.08%-- do_wp_page
                       |                     handle_pte_fault
                       |                     do_page_fault
                       |                     page_fault
                       |                     memset
                       |          
                       |--4.36%-- test_clear_page_writeback
                       |          end_page_writeback
                       |          put_io_page
                       |          ext4_end_bio
                       |          blk_update_request
                       |          blk_update_bidi_request
                       |          blk_end_bidi_request
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          do_IRQ
                       |          ret_from_intr
                       |          |          
                       |          |--62.50%-- copy_user_generic_unrolled
                       |          |          iov_iter_copy_from_user_atomic
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- _raw_spin_unlock_irq
                       |          |          add_to_page_cache_locked.part.29
                       |          |          add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- ext4_do_update_inode
                       |          |          ext4_mark_iloc_dirty
                       |          |          ext4_mark_inode_dirty
                       |          |          ext4_dirty_inode
                       |          |          __mark_inode_dirty
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- ext4_block_to_path.isra.9
                       |          |          ext4_ind_map_blocks
                       |          |          ext4_map_blocks
                       |          |          ext4_da_get_block_prep
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- __block_commit_write.isra.22
                       |          |          block_write_end
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- __ext4_journal_stop
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --6.25%-- alloc_pages_current
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                       |--1.63%-- blk_end_bidi_request
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          |          
                       |          |--83.33%-- do_IRQ
                       |          |          ret_from_intr
                       |          |          |          
                       |          |          |--40.00%-- ext4_da_get_block_prep
                       |          |          |          __block_write_begin
                       |          |          |          ext4_da_write_begin
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |          |--20.00%-- copy_user_generic_unrolled
                       |          |          |          iov_iter_copy_from_user_atomic
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |          |--20.00%-- iov_iter_fault_in_readable
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |           --20.00%-- kmem_cache_alloc
                       |          |                     alloc_buffer_head
                       |          |                     alloc_page_buffers
                       |          |                     create_empty_buffers
                       |          |                     __block_write_begin
                       |          |                     ext4_da_write_begin
                       |          |                     generic_perform_write
                       |          |                     generic_file_buffered_write
                       |          |                     __generic_file_aio_write
                       |          |                     generic_file_aio_write
                       |          |                     ext4_file_write
                       |          |                     do_sync_write
                       |          |                     vfs_write
                       |          |                     sys_write
                       |          |                     ia32_sysret
                       |          |                     0xf77904be
                       |          |                     __write_nocancel
                       |          |          
                       |           --16.67%-- smp_apic_timer_interrupt
                       |                     apic_timer_interrupt
                       |                     radix_tree_lookup_element
                       |                     find_get_page
                       |                     find_lock_page
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                       |--1.36%-- isolate_freepages
                       |          compaction_alloc
                       |          unmap_and_move
                       |          migrate_pages
                       |          compact_zone.part.15
                       |          compact_zone_order
                       |          try_to_compact_pages
                       |          __alloc_pages_direct_compact
                       |          __alloc_pages_nodemask
                       |          alloc_pages_vma
                       |          do_huge_pmd_anonymous_page
                       |          do_page_fault
                       |          page_fault
                       |          memset
                       |          
                       |--1.36%-- __alloc_pages_nodemask
                       |          alloc_pages_current
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--1.36%-- try_to_del_timer_sync
                       |          del_timer_sync
                       |          schedule_timeout
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--1.09%-- schedule_timeout
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--0.82%-- delayacct_end
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--0.54%-- test_set_page_writeback
                       |          ext4_bio_write_page
                       |          mpage_da_submit_io
                       |          mpage_da_map_and_submit
                       |          ext4_da_writepages
                       |          __filemap_fdatawrite_range
                       |          filemap_write_and_wait_range
                       |          ext4_sync_file
                       |          do_fsync
                       |          sys_fsync
                       |          ia32_sysret
                       |          __fsync_nocancel
                       |          0x8057120
                       |          0x805771a
                       |          0x80928e6
                       |          __libc_start_main
                        --0.82%-- [...]

     0.56%         kswapd0  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                   |
                   --- _raw_spin_unlock_irq
                      |          
                      |--64.00%-- shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--22.57%-- __remove_mapping
                      |          shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--9.43%-- finish_task_switch
                      |          thread_return
                      |          |          
                      |          |--48.48%-- preempt_schedule
                      |          |          |          
                      |          |          |--81.25%-- shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |           --18.75%-- try_to_free_buffers
                      |          |                     shrink_page_list
                      |          |                     shrink_inactive_list
                      |          |                     shrink_zone
                      |          |                     balance_pgdat
                      |          |                     kswapd
                      |          |                     kthread
                      |          |                     kernel_thread_helper
                      |          |          
                      |          |--39.39%-- preempt_schedule_irq
                      |          |          retint_kernel
                      |          |          |          
                      |          |          |--30.77%-- kmem_cache_free
                      |          |          |          free_buffer_head
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--15.38%-- shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--15.38%-- prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- _raw_spin_lock
                      |          |          |          put_super
                      |          |          |          prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- get_scan_count
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- free_buffer_head
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- page_check_references.isra.50
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |           --7.69%-- __mem_cgroup_uncharge_common
                      |          |                     __remove_mapping
                      |          |                     shrink_page_list
                      |          |                     shrink_inactive_list
                      |          |                     shrink_zone
                      |          |                     balance_pgdat
                      |          |                     kswapd
                      |          |                     kthread
                      |          |                     kernel_thread_helper
                      |          |          
                      |          |--9.09%-- schedule_timeout
                      |          |          kswapd_try_to_sleep
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --3.03%-- kswapd_try_to_sleep
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                      |--1.14%-- get_scan_count
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--0.86%-- __set_page_dirty_nobuffers.part.14
                      |          ext4_writepage
                      |          pageout
                      |          shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--0.86%-- scsi_request_fn
                      |          blk_run_queue
                      |          scsi_run_queue
                      |          scsi_next_command
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          |          
                      |          |--33.33%-- _raw_spin_unlock_irq
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |          |--33.33%-- drop_buffers
                      |          |          try_to_free_buffers
                      |          |          shrink_page_list
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --33.33%-- free_hot_cold_page
                      |                     __pagevec_free
                      |                     free_page_list
                      |                     shrink_page_list
                      |                     shrink_inactive_list
                      |                     shrink_zone
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                      |--0.57%-- putback_lru_pages
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                       --0.57%-- [...]

     0.39%          iozone  [kernel.kallsyms]           [k] get_page_from_freelist
                    |
                    --- get_page_from_freelist
                       |          
                       |--98.36%-- __alloc_pages_nodemask
                       |          alloc_pages_current
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --1.64%-- __write_nocancel

     0.38%          iozone  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                    |
                    --- _raw_spin_unlock_irq
                       |          
                       |--46.44%-- __set_page_dirty
                       |          __block_commit_write.isra.22
                       |          block_write_end
                       |          generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--25.52%-- finish_task_switch
                       |          thread_return
                       |          |          
                       |          |--81.97%-- schedule_timeout
                       |          |          io_schedule_timeout
                       |          |          balance_dirty_pages.isra.15
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--11.48%-- preempt_schedule
                       |          |          |          
                       |          |          |--71.43%-- generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |           --28.57%-- __alloc_pages_nodemask
                       |          |                     alloc_pages_current
                       |          |                     grab_cache_page_write_begin
                       |          |                     ext4_da_write_begin
                       |          |                     generic_perform_write
                       |          |                     generic_file_buffered_write
                       |          |                     __generic_file_aio_write
                       |          |                     generic_file_aio_write
                       |          |                     ext4_file_write
                       |          |                     do_sync_write
                       |          |                     vfs_write
                       |          |                     sys_write
                       |          |                     ia32_sysret
                       |          |                     0xf77904be
                       |          |                     __write_nocancel
                       |          |          
                       |           --6.56%-- preempt_schedule_irq
                       |                     retint_kernel
                       |                     |          
                       |                     |--25.00%-- ext4_data_block_valid
                       |                     |          ext4_map_blocks
                       |                     |          ext4_da_get_block_prep
                       |                     |          __block_write_begin
                       |                     |          ext4_da_write_begin
                       |                     |          generic_perform_write
                       |                     |          generic_file_buffered_write
                       |                     |          __generic_file_aio_write
                       |                     |          generic_file_aio_write
                       |                     |          ext4_file_write
                       |                     |          do_sync_write
                       |                     |          vfs_write
                       |                     |          sys_write
                       |                     |          ia32_sysret
                       |                     |          0xf77904be
                       |                     |          __write_nocancel
                       |                     |          
                       |                     |--25.00%-- get_page_from_freelist
                       |                     |          __alloc_pages_nodemask
                       |                     |          alloc_pages_current
                       |                     |          grab_cache_page_write_begin
                       |                     |          ext4_da_write_begin
                       |                     |          generic_perform_write
                       |                     |          generic_file_buffered_write
                       |                     |          __generic_file_aio_write
                       |                     |          generic_file_aio_write
                       |                     |          ext4_file_write
                       |                     |          do_sync_write
                       |                     |          vfs_write
                       |                     |          sys_write
                       |                     |          ia32_sysret
                       |                     |          0xf77904be
                       |                     |          __write_nocancel
                       |                     |          
                       |                     |--25.00%-- ext4_da_get_block_prep
                       |                     |          __block_write_begin
                       |                     |          ext4_da_write_begin
                       |                     |          generic_perform_write
                       |                     |          generic_file_buffered_write
                       |                     |          __generic_file_aio_write
                       |                     |          generic_file_aio_write
                       |                     |          ext4_file_write
                       |                     |          do_sync_write
                       |                     |          vfs_write
                       |                     |          sys_write
                       |                     |          ia32_sysret
                       |                     |          0xf77904be
                       |                     |          __write_nocancel
                       |                     |          
                       |                      --25.00%-- next_zones_zonelist
                       |                                get_page_from_freelist
                       |                                __alloc_pages_nodemask
                       |                                alloc_pages_current
                       |                                grab_cache_page_write_begin
                       |                                ext4_da_write_begin
                       |                                generic_perform_write
                       |                                generic_file_buffered_write
                       |                                __generic_file_aio_write
                       |                                generic_file_aio_write
                       |                                ext4_file_write
                       |                                do_sync_write
                       |                                vfs_write
                       |                                sys_write
                       |                                ia32_sysret
                       |                                0xf77904be
                       |                                __write_nocancel
                       |          
                       |--20.92%-- add_to_page_cache_locked.part.29
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--4.60%-- scsi_request_fn
                       |          blk_run_queue
                       |          scsi_run_queue
                       |          scsi_next_command
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          do_IRQ
                       |          ret_from_intr
                       |          |          
                       |          |--63.64%-- copy_user_generic_unrolled
                       |          |          iov_iter_copy_from_user_atomic
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--9.09%-- lock_timer_base.isra.30
                       |          |          try_to_del_timer_sync
                       |          |          del_timer_sync
                       |          |          schedule_timeout
                       |          |          io_schedule_timeout
                       |          |          balance_dirty_pages.isra.15
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--9.09%-- kmem_cache_alloc
                       |          |          alloc_buffer_head
                       |          |          alloc_page_buffers
                       |          |          create_empty_buffers
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--9.09%-- get_page_from_freelist
                       |          |          __alloc_pages_nodemask
                       |          |          alloc_pages_current
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --9.09%-- alloc_buffer_head
                       |                     alloc_page_buffers
                       |                     create_empty_buffers
                       |                     __block_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                       |--1.26%-- shrink_inactive_list
                       |          shrink_zone
                       |          shrink_zones
                       |          do_try_to_free_pages
                       |          try_to_free_pages
                       |          __alloc_pages_nodemask
                       |          |          
                       |          |--66.67%-- alloc_pages_vma
                       |          |          do_huge_pmd_anonymous_page
                       |          |          do_page_fault
                       |          |          page_fault
                       |          |          memset
                       |          |          
                       |           --33.33%-- alloc_pages_current
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                        --1.26%-- [...]

     0.27%          iozone  [kernel.kallsyms]           [k] __mem_cgroup_commit_charge
                    |
                    --- __mem_cgroup_commit_charge
                       |          
                       |--99.41%-- __mem_cgroup_commit_charge_lrucare
                       |          mem_cgroup_cache_charge
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --0.59%-- mem_cgroup_prepare_migration
                                  unmap_and_move
                                  migrate_pages
                                  compact_zone.part.15
                                  compact_zone_order
                                  try_to_compact_pages
                                  __alloc_pages_direct_compact
                                  __alloc_pages_nodemask
                                  alloc_pages_vma
                                  do_huge_pmd_anonymous_page
                                  do_page_fault
                                  page_fault
                                  memset

     0.27%       flush-8:0  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                 |
                 --- _raw_spin_unlock_irqrestore
                    |          
                    |--62.87%-- test_set_page_writeback
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--53.33%-- ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          |          
                    |          |          |--78.57%-- wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --21.43%-- wb_check_old_data_flush
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --46.67%-- write_cache_pages_da
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     |          
                    |                     |--73.47%-- wb_do_writeback
                    |                     |          bdi_writeback_thread
                    |                     |          kthread
                    |                     |          kernel_thread_helper
                    |                     |          
                    |                      --26.53%-- wb_check_old_data_flush
                    |                                wb_do_writeback
                    |                                bdi_writeback_thread
                    |                                kthread
                    |                                kernel_thread_helper
                    |          
                    |--31.14%-- ata_scsi_queuecmd
                    |          scsi_dispatch_cmd
                    |          scsi_request_fn
                    |          |          
                    |          |--98.08%-- blk_run_queue
                    |          |          scsi_run_queue
                    |          |          scsi_next_command
                    |          |          scsi_io_completion
                    |          |          blk_done_softirq
                    |          |          __do_softirq
                    |          |          call_softirq
                    |          |          do_softirq
                    |          |          irq_exit
                    |          |          |          
                    |          |          |--90.20%-- do_IRQ
                    |          |          |          ret_from_intr
                    |          |          |          |          
                    |          |          |          |--15.22%-- write_cache_pages_da
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          |          
                    |          |          |          |          |--85.71%-- wb_do_writeback
                    |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          kthread
                    |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --14.29%-- wb_check_old_data_flush
                    |          |          |          |                     wb_do_writeback
                    |          |          |          |                     bdi_writeback_thread
                    |          |          |          |                     kthread
                    |          |          |          |                     kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--15.22%-- find_get_pages_tag
                    |          |          |          |          pagevec_lookup_tag
                    |          |          |          |          |          
                    |          |          |          |          |--57.14%-- write_cache_pages_da
                    |          |          |          |          |          ext4_da_writepages
                    |          |          |          |          |          writeback_single_inode
                    |          |          |          |          |          writeback_sb_inodes
                    |          |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          |          wb_writeback
                    |          |          |          |          |          |          
                    |          |          |          |          |          |--75.00%-- wb_do_writeback
                    |          |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          |          kthread
                    |          |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          |          
                    |          |          |          |          |           --25.00%-- wb_check_old_data_flush
                    |          |          |          |          |                     wb_do_writeback
                    |          |          |          |          |                     bdi_writeback_thread
                    |          |          |          |          |                     kthread
                    |          |          |          |          |                     kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --42.86%-- ext4_num_dirty_pages.isra.35
                    |          |          |          |                     ext4_da_writepages
                    |          |          |          |                     writeback_single_inode
                    |          |          |          |                     writeback_sb_inodes
                    |          |          |          |                     __writeback_inodes_wb
                    |          |          |          |                     wb_writeback
                    |          |          |          |                     |          
                    |          |          |          |                     |--66.67%-- wb_check_old_data_flush
                    |          |          |          |                     |          wb_do_writeback
                    |          |          |          |                     |          bdi_writeback_thread
                    |          |          |          |                     |          kthread
                    |          |          |          |                     |          kernel_thread_helper
                    |          |          |          |                     |          
                    |          |          |          |                      --33.33%-- wb_do_writeback
                    |          |          |          |                                bdi_writeback_thread
                    |          |          |          |                                kthread
                    |          |          |          |                                kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--10.87%-- _raw_spin_unlock_irqrestore
                    |          |          |          |          test_set_page_writeback
                    |          |          |          |          ext4_bio_write_page
                    |          |          |          |          mpage_da_submit_io
                    |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          |          
                    |          |          |          |          |--60.00%-- ext4_da_writepages
                    |          |          |          |          |          writeback_single_inode
                    |          |          |          |          |          writeback_sb_inodes
                    |          |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          |          wb_writeback
                    |          |          |          |          |          |          
                    |          |          |          |          |          |--66.67%-- wb_do_writeback
                    |          |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          |          kthread
                    |          |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          |          
                    |          |          |          |          |           --33.33%-- wb_check_old_data_flush
                    |          |          |          |          |                     wb_do_writeback
                    |          |          |          |          |                     bdi_writeback_thread
                    |          |          |          |          |                     kthread
                    |          |          |          |          |                     kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --40.00%-- write_cache_pages_da
                    |          |          |          |                     ext4_da_writepages
                    |          |          |          |                     writeback_single_inode
                    |          |          |          |                     writeback_sb_inodes
                    |          |          |          |                     __writeback_inodes_wb
                    |          |          |          |                     wb_writeback
                    |          |          |          |                     |          
                    |          |          |          |                     |--50.00%-- wb_do_writeback
                    |          |          |          |                     |          bdi_writeback_thread
                    |          |          |          |                     |          kthread
                    |          |          |          |                     |          kernel_thread_helper
                    |          |          |          |                     |          
                    |          |          |          |                      --50.00%-- wb_check_old_data_flush
                    |          |          |          |                                wb_do_writeback
                    |          |          |          |                                bdi_writeback_thread
                    |          |          |          |                                kthread
                    |          |          |          |                                kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--8.70%-- mpage_da_submit_io
                    |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          |          
                    |          |          |          |          |--75.00%-- ext4_da_writepages
                    |          |          |          |          |          writeback_single_inode
                    |          |          |          |          |          writeback_sb_inodes
                    |          |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          |          wb_writeback
                    |          |          |          |          |          wb_do_writeback
                    |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          kthread
                    |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --25.00%-- write_cache_pages_da
                    |          |          |          |                     ext4_da_writepages
                    |          |          |          |                     writeback_single_inode
                    |          |          |          |                     writeback_sb_inodes
                    |          |          |          |                     __writeback_inodes_wb
                    |          |          |          |                     wb_writeback
                    |          |          |          |                     wb_do_writeback
                    |          |          |          |                     bdi_writeback_thread
                    |          |          |          |                     kthread
                    |          |          |          |                     kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--6.52%-- ext4_bio_write_page
                    |          |          |          |          mpage_da_submit_io
                    |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          write_cache_pages_da
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          wb_do_writeback
                    |          |          |          |          bdi_writeback_thread
                    |          |          |          |          kthread
                    |          |          |          |          kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--6.52%-- io_submit_add_bh
                    |          |          |          |          ext4_bio_write_page
                    |          |          |          |          mpage_da_submit_io
                    |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          |          
                    |          |          |          |          |--66.67%-- write_cache_pages_da
                    |          |          |          |          |          ext4_da_writepages
                    |          |          |          |          |          writeback_single_inode
                    |          |          |          |          |          writeback_sb_inodes
                    |          |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          |          wb_writeback
                    |          |          |          |          |          |          
                    |          |          |          |          |          |--50.00%-- wb_do_writeback
                    |          |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          |          kthread
                    |          |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          |          
                    |          |          |          |          |           --50.00%-- wb_check_old_data_flush
                    |          |          |          |          |                     wb_do_writeback
                    |          |          |          |          |                     bdi_writeback_thread
                    |          |          |          |          |                     kthread
                    |          |          |          |          |                     kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --33.33%-- ext4_da_writepages
                    |          |          |          |                     writeback_single_inode
                    |          |          |          |                     writeback_sb_inodes
                    |          |          |          |                     __writeback_inodes_wb
                    |          |          |          |                     wb_writeback
                    |          |          |          |                     wb_do_writeback
                    |          |          |          |                     bdi_writeback_thread
                    |          |          |          |                     kthread
                    |          |          |          |                     kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--6.52%-- ext4_num_dirty_pages.isra.35
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          wb_do_writeback
                    |          |          |          |          bdi_writeback_thread
                    |          |          |          |          kthread
                    |          |          |          |          kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--6.52%-- kmem_cache_alloc
                    |          |          |          |          |          
                    |          |          |          |          |--33.33%-- mempool_alloc
                    |          |          |          |          |          bio_alloc_bioset
                    |          |          |          |          |          bio_alloc
                    |          |          |          |          |          io_submit_init.isra.4
                    |          |          |          |          |          io_submit_add_bh
                    |          |          |          |          |          ext4_bio_write_page
                    |          |          |          |          |          mpage_da_submit_io
                    |          |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          |          write_cache_pages_da
                    |          |          |          |          |          ext4_da_writepages
                    |          |          |          |          |          writeback_single_inode
                    |          |          |          |          |          writeback_sb_inodes
                    |          |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          |          wb_writeback
                    |          |          |          |          |          wb_do_writeback
                    |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          kthread
                    |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |          |--33.33%-- bvec_alloc_bs
                    |          |          |          |          |          bio_alloc_bioset
                    |          |          |          |          |          bio_alloc
                    |          |          |          |          |          io_submit_init.isra.4
                    |          |          |          |          |          io_submit_add_bh
                    |          |          |          |          |          ext4_bio_write_page
                    |          |          |          |          |          mpage_da_submit_io
                    |          |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          |          write_cache_pages_da
                    |          |          |          |          |          ext4_da_writepages
                    |          |          |          |          |          writeback_single_inode
                    |          |          |          |          |          writeback_sb_inodes
                    |          |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          |          wb_writeback
                    |          |          |          |          |          wb_do_writeback
                    |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          kthread
                    |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --33.33%-- ext4_bio_write_page
                    |          |          |          |                     mpage_da_submit_io
                    |          |          |          |                     mpage_da_map_and_submit
                    |          |          |          |                     write_cache_pages_da
                    |          |          |          |                     ext4_da_writepages
                    |          |          |          |                     writeback_single_inode
                    |          |          |          |                     writeback_sb_inodes
                    |          |          |          |                     __writeback_inodes_wb
                    |          |          |          |                     wb_writeback
                    |          |          |          |                     wb_do_writeback
                    |          |          |          |                     bdi_writeback_thread
                    |          |          |          |                     kthread
                    |          |          |          |                     kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--4.35%-- page_waitqueue
                    |          |          |          |          unlock_page
                    |          |          |          |          ext4_num_dirty_pages.isra.35
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          wb_do_writeback
                    |          |          |          |          bdi_writeback_thread
                    |          |          |          |          kthread
                    |          |          |          |          kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--4.35%-- __blk_recalc_rq_segments
                    |          |          |          |          blk_recount_segments
                    |          |          |          |          bio_phys_segments
                    |          |          |          |          blk_rq_bio_prep
                    |          |          |          |          __make_request
                    |          |          |          |          generic_make_request.part.52
                    |          |          |          |          submit_bio
                    |          |          |          |          ext4_io_submit
                    |          |          |          |          |          
                    |          |          |          |          |--50.00%-- mpage_da_submit_io
                    |          |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          |          write_cache_pages_da
                    |          |          |          |          |          ext4_da_writepages
                    |          |          |          |          |          writeback_single_inode
                    |          |          |          |          |          writeback_sb_inodes
                    |          |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          |          wb_writeback
                    |          |          |          |          |          wb_do_writeback
                    |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          kthread
                    |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --50.00%-- io_submit_add_bh
                    |          |          |          |                     ext4_bio_write_page
                    |          |          |          |                     mpage_da_submit_io
                    |          |          |          |                     mpage_da_map_and_submit
                    |          |          |          |                     ext4_da_writepages
                    |          |          |          |                     writeback_single_inode
                    |          |          |          |                     writeback_sb_inodes
                    |          |          |          |                     __writeback_inodes_wb
                    |          |          |          |                     wb_writeback
                    |          |          |          |                     wb_do_writeback
                    |          |          |          |                     bdi_writeback_thread
                    |          |          |          |                     kthread
                    |          |          |          |                     kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--4.35%-- __lookup_tag
                    |          |          |          |          radix_tree_gang_lookup_tag_slot
                    |          |          |          |          find_get_pages_tag
                    |          |          |          |          pagevec_lookup_tag
                    |          |          |          |          write_cache_pages_da
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          |          
                    |          |          |          |          |--50.00%-- wb_check_old_data_flush
                    |          |          |          |          |          wb_do_writeback
                    |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          kthread
                    |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --50.00%-- wb_do_writeback
                    |          |          |          |                     bdi_writeback_thread
                    |          |          |          |                     kthread
                    |          |          |          |                     kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--2.17%-- memset
                    |          |          |          |          ext4_alloc_branch
                    |          |          |          |          ext4_ind_map_blocks
                    |          |          |          |          ext4_map_blocks
                    |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          write_cache_pages_da
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          wb_do_writeback
                    |          |          |          |          bdi_writeback_thread
                    |          |          |          |          kthread
                    |          |          |          |          kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--2.17%-- get_page_from_freelist
                    |          |          |          |          __alloc_pages_nodemask
                    |          |          |          |          kmem_getpages
                    |          |          |          |          cache_grow
                    |          |          |          |          cache_alloc_refill
                    |          |          |          |          kmem_cache_alloc
                    |          |          |          |          ext4_init_io_end
                    |          |          |          |          io_submit_init.isra.4
                    |          |          |          |          io_submit_add_bh
                    |          |          |          |          ext4_bio_write_page
                    |          |          |          |          mpage_da_submit_io
                    |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          write_cache_pages_da
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          wb_do_writeback
                    |          |          |          |          bdi_writeback_thread
                    |          |          |          |          kthread
                    |          |          |          |          kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--2.17%-- __bio_add_page.part.14
                    |          |          |          |          io_submit_add_bh
                    |          |          |          |          ext4_bio_write_page
                    |          |          |          |          mpage_da_submit_io
                    |          |          |          |          mpage_da_map_and_submit
                    |          |          |          |          write_cache_pages_da
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          wb_check_old_data_flush
                    |          |          |          |          wb_do_writeback
                    |          |          |          |          bdi_writeback_thread
                    |          |          |          |          kthread
                    |          |          |          |          kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--2.17%-- radix_tree_gang_lookup_tag_slot
                    |          |          |          |          find_get_pages_tag
                    |          |          |          |          pagevec_lookup_tag
                    |          |          |          |          ext4_num_dirty_pages.isra.35
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          wb_do_writeback
                    |          |          |          |          bdi_writeback_thread
                    |          |          |          |          kthread
                    |          |          |          |          kernel_thread_helper
                    |          |          |          |          
                    |          |          |           --2.17%-- _raw_spin_unlock_irq
                    |          |          |                     __make_request
                    |          |          |                     generic_make_request.part.52
                    |          |          |                     submit_bio
                    |          |          |                     ext4_io_submit
                    |          |          |                     mpage_da_submit_io
                    |          |          |                     mpage_da_map_and_submit
                    |          |          |                     write_cache_pages_da
                    |          |          |                     ext4_da_writepages
                    |          |          |                     writeback_single_inode
                    |          |          |                     writeback_sb_inodes
                    |          |          |                     __writeback_inodes_wb
                    |          |          |                     wb_writeback
                    |          |          |                     wb_check_old_data_flush
                    |          |          |                     wb_do_writeback
                    |          |          |                     bdi_writeback_thread
                    |          |          |                     kthread
                    |          |          |                     kernel_thread_helper
                    |          |          |          
                    |          |           --9.80%-- smp_apic_timer_interrupt
                    |          |                     apic_timer_interrupt
                    |          |                     |          
                    |          |                     |--20.00%-- ext4_num_dirty_pages.isra.35
                    |          |                     |          ext4_da_writepages
                    |          |                     |          writeback_single_inode
                    |          |                     |          writeback_sb_inodes
                    |          |                     |          __writeback_inodes_wb
                    |          |                     |          wb_writeback
                    |          |                     |          wb_do_writeback
                    |          |                     |          bdi_writeback_thread
                    |          |                     |          kthread
                    |          |                     |          kernel_thread_helper
                    |          |                     |          
                    |          |                     |--20.00%-- inc_zone_page_state
                    |          |                     |          test_set_page_writeback
                    |          |                     |          ext4_bio_write_page
                    |          |                     |          mpage_da_submit_io
                    |          |                     |          mpage_da_map_and_submit
                    |          |                     |          write_cache_pages_da
                    |          |                     |          ext4_da_writepages
                    |          |                     |          writeback_single_inode
                    |          |                     |          writeback_sb_inodes
                    |          |                     |          __writeback_inodes_wb
                    |          |                     |          wb_writeback
                    |          |                     |          wb_do_writeback
                    |          |                     |          bdi_writeback_thread
                    |          |                     |          kthread
                    |          |                     |          kernel_thread_helper
                    |          |                     |          
                    |          |                     |--20.00%-- mpage_da_submit_io
                    |          |                     |          mpage_da_map_and_submit
                    |          |                     |          write_cache_pages_da
                    |          |                     |          ext4_da_writepages
                    |          |                     |          writeback_single_inode
                    |          |                     |          writeback_sb_inodes
                    |          |                     |          __writeback_inodes_wb
                    |          |                     |          wb_writeback
                    |          |                     |          wb_check_old_data_flush
                    |          |                     |          wb_do_writeback
                    |          |                     |          bdi_writeback_thread
                    |          |                     |          kthread
                    |          |                     |          kernel_thread_helper
                    |          |                     |          
                    |          |                     |--20.00%-- write_cache_pages_da
                    |          |                     |          ext4_da_writepages
                    |          |                     |          writeback_single_inode
                    |          |                     |          writeback_sb_inodes
                    |          |                     |          __writeback_inodes_wb
                    |          |                     |          wb_writeback
                    |          |                     |          wb_check_old_data_flush
                    |          |                     |          wb_do_writeback
                    |          |                     |          bdi_writeback_thread
                    |          |                     |          kthread
                    |          |                     |          kernel_thread_helper
                    |          |                     |          
                    |          |                      --20.00%-- unmap_underlying_metadata
                    |          |                                mpage_da_map_and_submit
                    |          |                                write_cache_pages_da
                    |          |                                ext4_da_writepages
                    |          |                                writeback_single_inode
                    |          |                                writeback_sb_inodes
                    |          |                                __writeback_inodes_wb
                    |          |                                wb_writeback
                    |          |                                wb_do_writeback
                    |          |                                bdi_writeback_thread
                    |          |                                kthread
                    |          |                                kernel_thread_helper
                    |          |          
                    |           --1.92%-- queue_unplugged
                    |                     blk_flush_plug_list
                    |                     blk_finish_plug
                    |                     generic_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--2.99%-- test_clear_page_writeback
                    |          end_page_writeback
                    |          put_io_page
                    |          ext4_end_bio
                    |          blk_update_request
                    |          blk_update_bidi_request
                    |          blk_end_bidi_request
                    |          scsi_io_completion
                    |          blk_done_softirq
                    |          __do_softirq
                    |          call_softirq
                    |          do_softirq
                    |          irq_exit
                    |          do_IRQ
                    |          ret_from_intr
                    |          |          
                    |          |--20.00%-- _raw_spin_unlock_irqrestore
                    |          |          test_set_page_writeback
                    |          |          ext4_bio_write_page
                    |          |          mpage_da_submit_io
                    |          |          mpage_da_map_and_submit
                    |          |          write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |          |--20.00%-- kmem_cache_alloc
                    |          |          ext4_bio_write_page
                    |          |          mpage_da_submit_io
                    |          |          mpage_da_map_and_submit
                    |          |          write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |          |--20.00%-- write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_check_old_data_flush
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |          |--20.00%-- ext4_group_desc_csum
                    |          |          ext4_mb_mark_diskspace_used
                    |          |          ext4_mb_new_blocks
                    |          |          ext4_alloc_blocks
                    |          |          ext4_alloc_branch
                    |          |          ext4_ind_map_blocks
                    |          |          ext4_map_blocks
                    |          |          mpage_da_map_and_submit
                    |          |          write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --20.00%-- blkiocg_update_dispatch_stats
                    |                     0x246
                    |          
                    |--1.20%-- pagevec_lru_move_fn
                    |          drain_cpu_pagevecs
                    |          lru_add_drain
                    |          __pagevec_release
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--50.00%-- write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --50.00%-- ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--1.20%-- cfq_set_request
                    |          get_request
                    |          get_request_wait
                    |          __make_request
                    |          generic_make_request.part.52
                    |          submit_bio
                    |          ext4_io_submit
                    |          |          
                    |          |--50.00%-- mpage_da_submit_io
                    |          |          mpage_da_map_and_submit
                    |          |          write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_check_old_data_flush
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --50.00%-- io_submit_add_bh
                    |                     ext4_bio_write_page
                    |                     mpage_da_submit_io
                    |                     mpage_da_map_and_submit
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --0.60%-- blk_end_bidi_request
                               scsi_io_completion
                               blk_done_softirq
                               __do_softirq
                               call_softirq
                               do_softirq
                               irq_exit
                               do_IRQ
                               ret_from_intr
                               lookup_bh_lru
                               0x286

     0.25%         kswapd0  [kernel.kallsyms]           [k] drop_buffers
                   |
                   --- drop_buffers
                       try_to_free_buffers
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.23%          iozone  [kernel.kallsyms]           [k] iov_iter_fault_in_readable
                    |
                    --- iov_iter_fault_in_readable
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.23%       flush-8:0  [kernel.kallsyms]           [k] find_get_pages_tag
                 |
                 --- find_get_pages_tag
                     pagevec_lookup_tag
                    |          
                    |--64.83%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--78.72%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --21.28%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --35.17%-- ext4_num_dirty_pages.isra.35
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--76.47%-- wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --23.53%-- wb_check_old_data_flush
                                          wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.23%       flush-8:0  [kernel.kallsyms]           [k] write_cache_pages_da
                 |
                 --- write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                    |          
                    |--76.55%-- wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --23.45%-- wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.19%         kswapd0  [kernel.kallsyms]           [k] free_hot_cold_page
                   |
                   --- free_hot_cold_page
                      |          
                      |--99.18%-- __pagevec_free
                      |          free_page_list
                      |          shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                       --0.82%-- 0xffff88003ca6fc10

     0.19%         kswapd0  [kernel.kallsyms]           [k] shrink_slab
                   |
                   --- shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.19%          iozone  [kernel.kallsyms]           [k] __wake_up_bit
                    |
                    --- __wake_up_bit
                       |          
                       |--94.07%-- generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--5.08%-- put_io_page
                       |          ext4_end_bio
                       |          blk_update_request
                       |          blk_update_bidi_request
                       |          blk_end_bidi_request
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          do_IRQ
                       |          ret_from_intr
                       |          |          
                       |          |--66.67%-- copy_user_generic_unrolled
                       |          |          iov_iter_copy_from_user_atomic
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--16.67%-- _raw_spin_unlock_irq
                       |          |          __set_page_dirty
                       |          |          __block_commit_write.isra.22
                       |          |          block_write_end
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --16.67%-- ext4_do_update_inode
                       |                     ext4_mark_iloc_dirty
                       |                     ext4_mark_inode_dirty
                       |                     ext4_dirty_inode
                       |                     __mark_inode_dirty
                       |                     generic_write_end
                       |                     ext4_da_write_end
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                        --0.85%-- truncate_inode_pages_range
                                  ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.18%         swapper  [kernel.kallsyms]           [k] end_page_writeback
                   |
                   --- end_page_writeback
                      |          
                      |--99.10%-- put_io_page
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--93.64%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --6.36%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                       --0.90%-- end_swap_bio_write
                                 blk_update_request
                                 blk_update_bidi_request
                                 blk_end_bidi_request
                                 scsi_io_completion
                                 blk_done_softirq
                                 __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 do_IRQ
                                 ret_from_intr
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.16%     packagekitd  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
               |
               --- _raw_spin_unlock_irqrestore
                  |          
                  |--85.44%-- ata_scsi_queuecmd
                  |          scsi_dispatch_cmd
                  |          scsi_request_fn
                  |          |          
                  |          |--67.05%-- blk_flush_plug_list
                  |          |          |          
                  |          |          |--67.80%-- blk_finish_plug
                  |          |          |          |          
                  |          |          |          |--95.00%-- read_pages
                  |          |          |          |          __do_page_cache_readahead
                  |          |          |          |          ra_submit
                  |          |          |          |          filemap_fault
                  |          |          |          |          __do_fault
                  |          |          |          |          handle_pte_fault
                  |          |          |          |          do_page_fault
                  |          |          |          |          page_fault
                  |          |          |          |          |          
                  |          |          |          |          |--18.42%-- 0x7fd26c6c1a33
                  |          |          |          |          |          memset
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--7.89%-- 0x7fd26c6c1993
                  |          |          |          |          |          memset
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--5.26%-- 0x7fd26c6c0cc2
                  |          |          |          |          |          strcmp
                  |          |          |          |          |          
                  |          |          |          |          |--5.26%-- 0x7fd26c6c16f2
                  |          |          |          |          |          memset
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--5.26%-- 0x7fd26c6c1706
                  |          |          |          |          |          memset
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--5.26%-- 0x7fd26c6c1726
                  |          |          |          |          |          memset
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- __clear_user
                  |          |          |          |          |          padzero
                  |          |          |          |          |          load_elf_binary
                  |          |          |          |          |          search_binary_handler
                  |          |          |          |          |          do_execve_common.isra.27
                  |          |          |          |          |          sys_execve
                  |          |          |          |          |          stub_execve
                  |          |          |          |          |          0x7f249a0760f7
                  |          |          |          |          |          0x7f249a0760f7
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7f2853f04a33
                  |          |          |          |          |          memset
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26c6b4864
                  |          |          |          |          |          _dl_setup_hash
                  |          |          |          |          |          _dl_sysdep_start
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26c6c1996
                  |          |          |          |          |          memset
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26c6b0708
                  |          |          |          |          |          _dl_map_object_from_fd
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26b8a9b40
                  |          |          |          |          |          0x7fd26b8a9b40
                  |          |          |          |          |          (nil)
                  |          |          |          |          |          0x6567616b6361702f
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26c6b2fbb
                  |          |          |          |          |          check_match.10801
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26667f845
                  |          |          |          |          |          __bam_get_root_rpmdb
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd268960ea7
                  |          |          |          |          |          lh_strhash
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd2672feac0
                  |          |          |          |          |          zypp::repo::PluginServices::Impl::loadServices(zypp::filesystem::Pathname const&, boost::function<bool (zypp::ServiceInfo const&)> const&)
                  |          |          |          |          |          0x7fd2545a0dd0
                  |          |          |          |          |          0x9000007fd267437f
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26741eac0
                  |          |          |          |          |          std::pair<std::_Rb_tree_iterator<zypp::Url>, bool> std::_Rb_tree<zypp::Url, zypp::Url, std::_Identity<zypp::Url>, std::less<zypp::Url>, std::allocator<zypp::Url> >::_M_insert_unique<zypp::Url const&>(zypp::Url const&&&)
                  |          |          |          |          |          0x7fd2545a1d70
                  |          |          |          |          |          zypp::RepoInfo::~RepoInfo()
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd268946370
                  |          |          |          |          |          ERR_load_RSA_strings
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd2689b4e60
                  |          |          |          |          |          ERR_load_COMP_strings
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd2672c2080
                  |          |          |          |          |          boost::detail::sp_counted_impl_p<zypp::media::TransferSettings::Impl>::dispose()
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x438370
                  |          |          |          |          |          pk_transaction_list_get_size
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26a943651
                  |          |          |          |          |          __strlen_sse2
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd26b865e1c
                  |          |          |          |          |          g_dbus_is_member_name
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd267218770
                  |          |          |          |          |          zypp::filesystem::Pathname::~Pathname()
                  |          |          |          |          |          
                  |          |          |          |          |--2.63%-- 0x7fd263e663e8
                  |          |          |          |          |          0x7fd263e663e8
                  |          |          |          |          |          __run_exit_handlers
                  |          |          |          |          |          
                  |          |          |          |           --2.63%-- 0x7fd263a43b98
                  |          |          |          |                     0x7fd263a43b98
                  |          |          |          |                     __run_exit_handlers
                  |          |          |          |          
                  |          |          |           --5.00%-- generic_file_aio_read
                  |          |          |                     do_sync_read
                  |          |          |                     vfs_read
                  |          |          |                     sys_read
                  |          |          |                     system_call_fastpath
                  |          |          |                     0x7fd26ac62dcd
                  |          |          |                     __libc_read
                  |          |          |          
                  |          |           --32.20%-- io_schedule
                  |          |                     |          
                  |          |                     |--78.95%-- sleep_on_page_killable
                  |          |                     |          __wait_on_bit_lock
                  |          |                     |          __lock_page_killable
                  |          |                     |          do_generic_file_read.constprop.34
                  |          |                     |          generic_file_aio_read
                  |          |                     |          do_sync_read
                  |          |                     |          vfs_read
                  |          |                     |          |          
                  |          |                     |          |--86.67%-- sys_read
                  |          |                     |          |          system_call_fastpath
                  |          |                     |          |          |          
                  |          |                     |          |          |--53.85%-- 0x7fd26a9905bd
                  |          |                     |          |          |          0x7fd26a9905bd
                  |          |                     |          |          |          
                  |          |                     |          |          |--38.46%-- 0x7fd26ac62dcd
                  |          |                     |          |          |          __libc_read
                  |          |                     |          |          |          |          
                  |          |                     |          |          |          |--25.00%-- 0x680a40
                  |          |                     |          |          |          |          
                  |          |                     |          |          |          |--25.00%-- (nil)
                  |          |                     |          |          |          |          
                  |          |                     |          |          |          |--25.00%-- 0x3200000009
                  |          |                     |          |          |          |          
                  |          |                     |          |          |           --25.00%-- 0x1
                  |          |                     |          |          |          
                  |          |                     |          |           --7.69%-- 0x7fd26a9905a0
                  |          |                     |          |                     __read_nocancel
                  |          |                     |          |          
                  |          |                     |          |--6.67%-- kernel_read
                  |          |                     |          |          do_execve_common.isra.27
                  |          |                     |          |          sys_execve
                  |          |                     |          |          stub_execve
                  |          |                     |          |          0x7f249a0760f7
                  |          |                     |          |          __execve
                  |          |                     |          |          
                  |          |                     |           --6.67%-- sys_pread64
                  |          |                     |                     system_call_fastpath
                  |          |                     |                     0x7fd26ac63653
                  |          |                     |                     __libc_pread64
                  |          |                     |          
                  |          |                      --21.05%-- sleep_on_buffer
                  |          |                                __wait_on_bit
                  |          |                                out_of_line_wait_on_bit
                  |          |                                bh_submit_read
                  |          |                                ext4_get_branch
                  |          |                                ext4_ind_map_blocks
                  |          |                                ext4_map_blocks
                  |          |                                _ext4_get_block
                  |          |                                do_mpage_readpage
                  |          |                                mpage_readpages
                  |          |                                read_pages
                  |          |                                __do_page_cache_readahead
                  |          |                                ra_submit
                  |          |                                filemap_fault
                  |          |                                __do_fault
                  |          |                                handle_pte_fault
                  |          |                                do_page_fault
                  |          |                                page_fault
                  |          |                                |          
                  |          |                                |--50.00%-- 0x7fd26c6c1a33
                  |          |                                |          memset
                  |          |                                |          _dl_map_object
                  |          |                                |          
                  |          |                                |--25.00%-- 0x7fd26c6c171e
                  |          |                                |          memset
                  |          |                                |          _dl_map_object
                  |          |                                |          
                  |          |                                 --25.00%-- 0x7fd2673c5340
                  |          |                                           zypp::RWCOW_pointer<zypp::ProgressData::Data, zypp::rw_pointer::Shared<zypp::ProgressData::Data> >::assertUnshared()
                  |          |                                           0x7fd254005e60
                  |          |          
                  |          |--23.86%-- blk_run_queue
                  |          |          scsi_run_queue
                  |          |          scsi_next_command
                  |          |          scsi_io_completion
                  |          |          blk_done_softirq
                  |          |          __do_softirq
                  |          |          call_softirq
                  |          |          do_softirq
                  |          |          irq_exit
                  |          |          |          
                  |          |          |--90.48%-- do_IRQ
                  |          |          |          ret_from_intr
                  |          |          |          |          
                  |          |          |          |--15.79%-- _raw_spin_unlock_irq
                  |          |          |          |          |          
                  |          |          |          |          |--33.33%-- scsi_request_fn
                  |          |          |          |          |          queue_unplugged
                  |          |          |          |          |          blk_flush_plug_list
                  |          |          |          |          |          blk_finish_plug
                  |          |          |          |          |          read_pages
                  |          |          |          |          |          __do_page_cache_readahead
                  |          |          |          |          |          ra_submit
                  |          |          |          |          |          filemap_fault
                  |          |          |          |          |          __do_fault
                  |          |          |          |          |          handle_pte_fault
                  |          |          |          |          |          do_page_fault
                  |          |          |          |          |          page_fault
                  |          |          |          |          |          0x7f2853f049e3
                  |          |          |          |          |          memset
                  |          |          |          |          |          _dl_map_object
                  |          |          |          |          |          
                  |          |          |          |          |--33.33%-- isolate_migratepages
                  |          |          |          |          |          compact_zone.part.15
                  |          |          |          |          |          compact_zone_order
                  |          |          |          |          |          try_to_compact_pages
                  |          |          |          |          |          __alloc_pages_direct_compact
                  |          |          |          |          |          __alloc_pages_nodemask
                  |          |          |          |          |          alloc_pages_vma
                  |          |          |          |          |          do_huge_pmd_anonymous_page
                  |          |          |          |          |          do_page_fault
                  |          |          |          |          |          page_fault
                  |          |          |          |          |          0x7fd2666fda41
                  |          |          |          |          |          __mutex_open_rpmdb
                  |          |          |          |          |          
                  |          |          |          |           --33.33%-- __make_request
                  |          |          |          |                     generic_make_request.part.52
                  |          |          |          |                     submit_bio
                  |          |          |          |                     submit_bh
                  |          |          |          |                     ll_rw_block
                  |          |          |          |                     __breadahead
                  |          |          |          |                     __ext4_get_inode_loc
                  |          |          |          |                     ext4_iget
                  |          |          |          |                     ext4_lookup.part.28
                  |          |          |          |                     d_alloc_and_lookup
                  |          |          |          |                     do_lookup
                  |          |          |          |                     do_last
                  |          |          |          |                     path_openat
                  |          |          |          |                     do_filp_open
                  |          |          |          |                     do_sys_open
                  |          |          |          |                     system_call_fastpath
                  |          |          |          |                     0x7fd26a99023d
                  |          |          |          |                     __GI___libc_open
                  |          |          |          |                     0x7c00000077
                  |          |          |          |          
                  |          |          |          |--10.53%-- copy_page
                  |          |          |          |          migrate_page_copy
                  |          |          |          |          migrate_page
                  |          |          |          |          move_to_new_page
                  |          |          |          |          unmap_and_move
                  |          |          |          |          migrate_pages
                  |          |          |          |          compact_zone.part.15
                  |          |          |          |          compact_zone_order
                  |          |          |          |          try_to_compact_pages
                  |          |          |          |          __alloc_pages_direct_compact
                  |          |          |          |          __alloc_pages_nodemask
                  |          |          |          |          alloc_pages_vma
                  |          |          |          |          do_huge_pmd_anonymous_page
                  |          |          |          |          do_page_fault
                  |          |          |          |          page_fault
                  |          |          |          |          0x7fd2666fda41
                  |          |          |          |          __mutex_open_rpmdb
                  |          |          |          |          
                  |          |          |          |--5.26%-- 0x7fd266654bc5
                  |          |          |          |          rpmSetTables
                  |          |          |          |          (nil)
                  |          |          |          |          
                  |          |          |          |--5.26%-- get_mm_counter
                  |          |          |          |          try_to_unmap_one
                  |          |          |          |          try_to_unmap_anon
                  |          |          |          |          try_to_unmap
                  |          |          |          |          unmap_and_move
                  |          |          |          |          migrate_pages
                  |          |          |          |          compact_zone.part.15
                  |          |          |          |          compact_zone_order
                  |          |          |          |          try_to_compact_pages
                  |          |          |          |          __alloc_pages_direct_compact
                  |          |          |          |          __alloc_pages_nodemask
                  |          |          |          |          alloc_pages_vma
                  |          |          |          |          do_huge_pmd_anonymous_page
                  |          |          |          |          do_page_fault
                  |          |          |          |          page_fault
                  |          |          |          |          0x7fd2666fda41
                  |          |          |          |          __mutex_open_rpmdb
                  |          |          |          |          
                  |          |          |          |--5.26%-- __page_check_address
                  |          |          |          |          try_to_unmap_one
                  |          |          |          |          try_to_unmap_file
                  |          |          |          |          try_to_unmap
                  |          |          |          |          unmap_and_move
                  |          |          |          |          migrate_pages
                  |          |          |          |          compact_zone.part.15
                  |          |          |          |          compact_zone_order
                  |          |          |          |          try_to_compact_pages
                  |          |          |          |          __alloc_pages_direct_compact
                  |          |          |          |          __alloc_pages_nodemask
                  |          |          |          |          alloc_pages_vma
                  |          |          |          |          do_huge_pmd_anonymous_page
                  |          |          |          |          do_page_fault
                  |          |          |          |          page_fault
                  |          |          |          |          0x7fd2666fda41
                  |          |          |          |          __mutex_open_rpmdb
                  |          |          |          |          
                  |          |          |          |--5.26%-- ext4_get_group_desc
                  |          |          |          |          __ext4_get_inode_loc
                  |          |          |          |          ext4_reserve_inode_write
                  |          |          |          |          ext4_mark_inode_dirty
                  |          |          |          |          ext4_dirty_inode
                  |          |          |          |          __mark_inode_dirty
                  |          |          |          |          file_update_time
                  |          |          |          |          __generic_file_aio_write
                  |          |          |          |          generic_file_aio_write
                  |          |          |          |          ext4_file_write
                  |          |          |          |          do_sync_write
                  |          |          |          |          vfs_write
                  |          |          |          |          sys_write
                  |          |          |          |          system_call_fastpath
                  |          |          |          |          0x7fd26ac62d6d
                  |          |          |          |          __libc_write
                  |          |          |          |          
                  |          |          |          |--5.26%-- 0x7fd2674bd561
                  |          |          |          |          zypp::base::logger::Loglinebuf::writeout(char const*, long)
                  |          |          |          |          0x6177200064657465
                  |          |          |          |          
                  |          |          |          |--5.26%-- 0x7fd26a93dcf0
                  |          |          |          |          malloc
                  |          |          |          |          0x4800454c4946444e
                  |          |          |          |          
                  |          |          |          |--5.26%-- 0x7fd2666fc8c3
                  |          |          |          |          __lock_ohash_rpmdb
                  |          |          |          |          
                  |          |          |          |--5.26%-- apparmor_file_permission
                  |          |          |          |          security_file_permission
                  |          |          |          |          rw_verify_area
                  |          |          |          |          vfs_read
                  |          |          |          |          sys_read
                  |          |          |          |          system_call_fastpath
                  |          |          |          |          0x7fd26ac62dcd
                  |          |          |          |          __libc_read
                  |          |          |          |          0x7fd2540cb001
                  |          |          |          |          
                  |          |          |          |--5.26%-- 0x7fd26896110c
                  |          |          |          |          lh_insert
                  |          |          |          |          0x7fd268c3ec60
                  |          |          |          |          
                  |          |          |          |--5.26%-- 0x7fd26c6b309c
                  |          |          |          |          check_match.10801
                  |          |          |          |          (nil)
                  |          |          |          |          
                  |          |          |          |--5.26%-- __find_get_block
                  |          |          |          |          __getblk_slow
                  |          |          |          |          __breadahead
                  |          |          |          |          __ext4_get_inode_loc
                  |          |          |          |          ext4_reserve_inode_write
                  |          |          |          |          ext4_mark_inode_dirty
                  |          |          |          |          ext4_rmdir
                  |          |          |          |          vfs_rmdir.part.29
                  |          |          |          |          do_rmdir
                  |          |          |          |          system_call_fastpath
                  |          |          |          |          0x7fd26a992b17
                  |          |          |          |          __GI___rmdir
                  |          |          |          |          
                  |          |          |          |--5.26%-- 0x7fd26aebfddc
                  |          |          |          |          0x7fd26aebfddc
                  |          |          |          |          
                  |          |          |          |--5.26%-- filemap_fault
                  |          |          |          |          __do_fault
                  |          |          |          |          handle_pte_fault
                  |          |          |          |          do_page_fault
                  |          |          |          |          page_fault
                  |          |          |          |          0x7fd26a99afd0
                  |          |          |          |          closelog
                  |          |          |          |          
                  |          |          |           --5.26%-- 0x7fd26c6b325e
                  |          |          |                     do_lookup_x
                  |          |          |          
                  |          |           --9.52%-- smp_apic_timer_interrupt
                  |          |                     apic_timer_interrupt
                  |          |                     |          
                  |          |                     |--50.00%-- clear_page
                  |          |                     |          prep_new_page
                  |          |                     |          get_page_from_freelist
                  |          |                     |          __alloc_pages_nodemask
                  |          |                     |          alloc_pages_vma
                  |          |                     |          do_anonymous_page.isra.39
                  |          |                     |          do_page_fault
                  |          |                     |          page_fault
                  |          |                     |          0x7fd2666fda41
                  |          |                     |          __mutex_open_rpmdb
                  |          |                     |          
                  |          |                      --50.00%-- _raw_spin_unlock_irq
                  |          |                                scsi_request_fn
                  |          |                                queue_unplugged
                  |          |                                blk_flush_plug_list
                  |          |                                blk_finish_plug
                  |          |                                read_pages
                  |          |                                __do_page_cache_readahead
                  |          |                                ra_submit
                  |          |                                filemap_fault
                  |          |                                __do_fault
                  |          |                                handle_pte_fault
                  |          |                                do_page_fault
                  |          |                                page_fault
                  |          |                                0x7fd2688fa4e0
                  |          |                                CRYPTO_free
                  |          |          
                  |           --9.09%-- __make_request
                  |                     generic_make_request.part.52
                  |                     submit_bio
                  |                     submit_bh
                  |                     |          
                  |                     |--75.00%-- ll_rw_block
                  |                     |          |          
                  |                     |          |--66.67%-- ext4_find_entry
                  |                     |          |          ext4_lookup.part.28
                  |                     |          |          d_alloc_and_lookup
                  |                     |          |          do_lookup
                  |                     |          |          |          
                  |                     |          |          |--50.00%-- link_path_walk
                  |                     |          |          |          |          
                  |                     |          |          |          |--50.00%-- path_lookupat
                  |                     |          |          |          |          do_path_lookup
                  |                     |          |          |          |          user_path_at
                  |                     |          |          |          |          vfs_fstatat
                  |                     |          |          |          |          sys_newstat
                  |                     |          |          |          |          system_call_fastpath
                  |                     |          |          |          |          0x7f28535d9835
                  |                     |          |          |          |          __xstat64
                  |                     |          |          |          |          (nil)
                  |                     |          |          |          |          
                  |                     |          |          |           --50.00%-- path_openat
                  |                     |          |          |                     do_filp_open
                  |                     |          |          |                     do_sys_open
                  |                     |          |          |                     system_call_fastpath
                  |                     |          |          |                     0x7fd26a99023d
                  |                     |          |          |                     __GI___libc_open
                  |                     |          |          |          
                  |                     |          |          |--25.00%-- do_last
                  |                     |          |          |          path_openat
                  |                     |          |          |          do_filp_open
                  |                     |          |          |          do_sys_open
                  |                     |          |          |          system_call_fastpath
                  |                     |          |          |          0x7fd26a990220
                  |                     |          |          |          __GI___libc_open
                  |                     |          |          |          
                  |                     |          |           --25.00%-- path_lookupat
                  |                     |          |                     do_path_lookup
                  |                     |          |                     user_path_at
                  |                     |          |                     vfs_fstatat
                  |                     |          |                     sys_newstat
                  |                     |          |                     system_call_fastpath
                  |                     |          |                     0x7fd26a98f835
                  |                     |          |                     __xstat64
                  |                     |          |                     0x7fd2540cebf8
                  |                     |          |          
                  |                     |           --33.33%-- __breadahead
                  |                     |                     __ext4_get_inode_loc
                  |                     |                     ext4_iget
                  |                     |                     ext4_lookup.part.28
                  |                     |                     d_alloc_and_lookup
                  |                     |                     do_lookup
                  |                     |                     |          
                  |                     |                     |--50.00%-- link_path_walk
                  |                     |                     |          path_openat
                  |                     |                     |          do_filp_open
                  |                     |                     |          do_sys_open
                  |                     |                     |          system_call_fastpath
                  |                     |                     |          0x7fd26ac6358d
                  |                     |                     |          0x7fd26ac6358d
                  |                     |                     |          
                  |                     |                      --50.00%-- do_last
                  |                     |                                path_openat
                  |                     |                                do_filp_open
                  |                     |                                do_sys_open
                  |                     |                                system_call_fastpath
                  |                     |                                0x7fd26a99023d
                  |                     |                                __GI___libc_open
                  |                     |          
                  |                      --25.00%-- __sync_dirty_buffer
                  |                                ext4_write_inode
                  |                                writeback_single_inode
                  |                                sync_inode
                  |                                sync_inode_metadata
                  |                                ext4_sync_file
                  |                                do_fsync
                  |                                sys_fsync
                  |                                system_call_fastpath
                  |                                0x7fd26ac6340d
                  |                                0x7fd26ac6340d
                  |          
                  |--7.77%-- isolate_freepages
                  |          compaction_alloc
                  |          unmap_and_move
                  |          migrate_pages
                  |          compact_zone.part.15
                  |          compact_zone_order
                  |          try_to_compact_pages
                  |          __alloc_pages_direct_compact
                  |          __alloc_pages_nodemask
                  |          alloc_pages_vma
                  |          do_huge_pmd_anonymous_page
                  |          do_page_fault
                  |          page_fault
                  |          0x7fd2666fda41
                  |          __mutex_open_rpmdb
                  |          
                  |--4.85%-- pagevec_lru_move_fn
                  |          __lru_cache_add
                  |          |          
                  |          |--80.00%-- putback_lru_page
                  |          |          unmap_and_move
                  |          |          migrate_pages
                  |          |          compact_zone.part.15
                  |          |          compact_zone_order
                  |          |          try_to_compact_pages
                  |          |          __alloc_pages_direct_compact
                  |          |          __alloc_pages_nodemask
                  |          |          alloc_pages_vma
                  |          |          do_huge_pmd_anonymous_page
                  |          |          do_page_fault
                  |          |          page_fault
                  |          |          0x7fd2666fda41
                  |          |          __mutex_open_rpmdb
                  |          |          
                  |           --20.00%-- do_anonymous_page.isra.39
                  |                     do_page_fault
                  |                     page_fault
                  |                     0x7fd2666fda41
                  |                     __mutex_open_rpmdb
                  |          
                  |--0.97%-- sock_def_readable
                  |          unix_stream_sendmsg
                  |          sock_sendmsg
                  |          __sys_sendmsg
                  |          sys_sendmsg
                  |          system_call_fastpath
                  |          0x7fd26ac6333d
                  |          __libc_sendmsg
                  |          
                   --0.97%-- blk_end_bidi_request
                             scsi_io_completion
                             blk_done_softirq
                             __do_softirq
                             call_softirq
                             do_softirq
                             irq_exit
                             do_IRQ
                             ret_from_intr
                             _raw_spin_unlock_irqrestore
                             pagevec_lru_move_fn
                             drain_cpu_pagevecs
                             lru_add_drain
                             __pagevec_release
                             shmem_truncate_range
                             shmem_evict_inode
                             evict
                             do_unlinkat
                             system_call_fastpath
                             0x7fd26a992957
                             __GI___unlink

     0.14%          iozone  [kernel.kallsyms]           [k] alloc_buffer_head
                    |
                    --- alloc_buffer_head
                        alloc_page_buffers
                        create_empty_buffers
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.13%         swapper  [kernel.kallsyms]           [k] __wake_up_bit
                   |
                   --- __wake_up_bit
                      |          
                      |--98.78%-- put_io_page
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--88.89%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          |          
                      |          |          |--98.61%-- native_safe_halt
                      |          |          |          default_idle
                      |          |          |          cpu_idle
                      |          |          |          start_kernel
                      |          |          |          x86_64_start_kernel
                      |          |          |          
                      |          |           --1.39%-- tick_nohz_stop_sched_tick
                      |          |                     cpu_idle
                      |          |                     start_kernel
                      |          |                     x86_64_start_kernel
                      |          |          
                      |           --11.11%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                       --1.22%-- end_buffer_read_sync
                                 end_bio_bh_io_sync
                                 blk_update_request
                                 blk_update_bidi_request
                                 blk_end_bidi_request
                                 scsi_io_completion
                                 blk_done_softirq
                                 __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 do_IRQ
                                 ret_from_intr
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.13%         kswapd0  [kernel.kallsyms]           [k] kmem_cache_free
                   |
                   --- kmem_cache_free
                       free_buffer_head
                       try_to_free_buffers
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.12%          iozone  [kernel.kallsyms]           [k] __do_softirq
                    |
                    --- __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                       |          
                       |--74.36%-- do_IRQ
                       |          ret_from_intr
                       |          |          
                       |          |--48.28%-- copy_user_generic_unrolled
                       |          |          iov_iter_copy_from_user_atomic
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--5.17%-- _raw_spin_unlock_irq
                       |          |          __set_page_dirty
                       |          |          __block_commit_write.isra.22
                       |          |          block_write_end
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--3.45%-- alloc_buffer_head
                       |          |          alloc_page_buffers
                       |          |          create_empty_buffers
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--3.45%-- radix_tree_lookup_element
                       |          |          find_get_page
                       |          |          |          
                       |          |          |--50.00%-- find_lock_page
                       |          |          |          grab_cache_page_write_begin
                       |          |          |          ext4_da_write_begin
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |           --50.00%-- __find_get_block_slow.isra.19
                       |          |                     __find_get_block
                       |          |                     __getblk
                       |          |                     ext4_get_branch
                       |          |                     ext4_ind_map_blocks
                       |          |                     ext4_map_blocks
                       |          |                     ext4_da_get_block_prep
                       |          |                     __block_write_begin
                       |          |                     ext4_da_write_begin
                       |          |                     generic_perform_write
                       |          |                     generic_file_buffered_write
                       |          |                     __generic_file_aio_write
                       |          |                     generic_file_aio_write
                       |          |                     ext4_file_write
                       |          |                     do_sync_write
                       |          |                     vfs_write
                       |          |                     sys_write
                       |          |                     ia32_sysret
                       |          |                     0xf77904be
                       |          |                     __write_nocancel
                       |          |          
                       |          |--3.45%-- get_page_from_freelist
                       |          |          __alloc_pages_nodemask
                       |          |          alloc_pages_current
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- cache_grow
                       |          |          cache_alloc_refill
                       |          |          kmem_cache_alloc
                       |          |          alloc_buffer_head
                       |          |          alloc_page_buffers
                       |          |          create_empty_buffers
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- __mem_cgroup_try_charge
                       |          |          mem_cgroup_cache_charge
                       |          |          add_to_page_cache_locked
                       |          |          add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- ext4_ind_map_blocks
                       |          |          ext4_map_blocks
                       |          |          ext4_da_get_block_prep
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- prop_norm_single
                       |          |          prop_fraction_single
                       |          |          balance_dirty_pages.isra.15
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- __ext4_get_inode_loc
                       |          |          ext4_reserve_inode_write
                       |          |          ext4_mark_inode_dirty
                       |          |          ext4_dirty_inode
                       |          |          __mark_inode_dirty
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- __rcu_read_lock
                       |          |          find_get_page
                       |          |          find_lock_page
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- zone_watermark_ok
                       |          |          get_page_from_freelist
                       |          |          __alloc_pages_nodemask
                       |          |          alloc_pages_current
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- alloc_page_buffers
                       |          |          create_empty_buffers
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- __mem_cgroup_commit_charge
                       |          |          __mem_cgroup_commit_charge_lrucare
                       |          |          mem_cgroup_cache_charge
                       |          |          add_to_page_cache_locked
                       |          |          add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- alloc_pages_current
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- clear_page_dirty_for_io
                       |          |          mpage_da_submit_io
                       |          |          mpage_da_map_and_submit
                       |          |          write_cache_pages_da
                       |          |          ext4_da_writepages
                       |          |          __filemap_fdatawrite_range
                       |          |          filemap_write_and_wait_range
                       |          |          ext4_sync_file
                       |          |          do_fsync
                       |          |          sys_fsync
                       |          |          ia32_sysret
                       |          |          __fsync_nocancel
                       |          |          0x8057120
                       |          |          0x805771a
                       |          |          0x80928e6
                       |          |          __libc_start_main
                       |          |          
                       |          |--1.72%-- 0x80594da
                       |          |          0x80594da
                       |          |          0x8057120
                       |          |          0x805771a
                       |          |          0x80928e6
                       |          |          __libc_start_main
                       |          |          
                       |          |--1.72%-- generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- add_to_page_cache_locked
                       |          |          add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- mem_cgroup_lru_add_after_commit
                       |          |          mem_cgroup_cache_charge
                       |          |          add_to_page_cache_locked
                       |          |          add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- _raw_spin_unlock_irqrestore
                       |          |          pagevec_lru_move_fn
                       |          |          __lru_cache_add
                       |          |          add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- prep_new_page
                       |          |          get_page_from_freelist
                       |          |          __alloc_pages_nodemask
                       |          |          alloc_pages_current
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- __wake_up_bit
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- ext4_block_to_path.isra.9
                       |          |          ext4_ind_map_blocks
                       |          |          ext4_map_blocks
                       |          |          ext4_da_get_block_prep
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--1.72%-- __alloc_pages_nodemask
                       |          |          alloc_pages_current
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --1.72%-- memset
                       |                     kmem_cache_alloc
                       |                     alloc_buffer_head
                       |                     alloc_page_buffers
                       |                     create_empty_buffers
                       |                     __block_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                        --25.64%-- smp_apic_timer_interrupt
                                  apic_timer_interrupt
                                  |          
                                  |--50.00%-- copy_user_generic_unrolled
                                  |          iov_iter_copy_from_user_atomic
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                  |--10.00%-- _raw_spin_unlock_irqrestore
                                  |          |          
                                  |          |--50.00%-- pagevec_lru_move_fn
                                  |          |          __lru_cache_add
                                  |          |          add_to_page_cache_lru
                                  |          |          grab_cache_page_write_begin
                                  |          |          ext4_da_write_begin
                                  |          |          generic_perform_write
                                  |          |          generic_file_buffered_write
                                  |          |          __generic_file_aio_write
                                  |          |          generic_file_aio_write
                                  |          |          ext4_file_write
                                  |          |          do_sync_write
                                  |          |          vfs_write
                                  |          |          sys_write
                                  |          |          ia32_sysret
                                  |          |          0xf77904be
                                  |          |          __write_nocancel
                                  |          |          
                                  |           --50.00%-- ata_scsi_queuecmd
                                  |                     scsi_dispatch_cmd
                                  |                     scsi_request_fn
                                  |                     queue_unplugged
                                  |                     blk_flush_plug_list
                                  |                     blk_finish_plug
                                  |                     read_pages
                                  |                     __do_page_cache_readahead
                                  |                     ra_submit
                                  |                     filemap_fault
                                  |                     __do_fault
                                  |                     handle_pte_fault
                                  |                     do_page_fault
                                  |                     page_fault
                                  |                     0x8054861
                                  |                     0x8054861
                                  |                     0x80929a9
                                  |                     __libc_start_main
                                  |          
                                  |--5.00%-- iov_iter_copy_from_user_atomic
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                  |--5.00%-- alloc_pages_current
                                  |          grab_cache_page_write_begin
                                  |          ext4_da_write_begin
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                  |--5.00%-- __alloc_pages_nodemask
                                  |          alloc_pages_current
                                  |          grab_cache_page_write_begin
                                  |          ext4_da_write_begin
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                  |--5.00%-- get_page_from_freelist
                                  |          __alloc_pages_nodemask
                                  |          alloc_pages_current
                                  |          grab_cache_page_write_begin
                                  |          ext4_da_write_begin
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                  |--5.00%-- _raw_spin_unlock_irq
                                  |          __set_page_dirty
                                  |          __block_commit_write.isra.22
                                  |          block_write_end
                                  |          generic_write_end
                                  |          ext4_da_write_end
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                  |--5.00%-- ext4_get_branch
                                  |          ext4_ind_map_blocks
                                  |          ext4_map_blocks
                                  |          ext4_da_get_block_prep
                                  |          __block_write_begin
                                  |          ext4_da_write_begin
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                  |--5.00%-- alloc_buffer_head
                                  |          alloc_page_buffers
                                  |          create_empty_buffers
                                  |          __block_write_begin
                                  |          ext4_da_write_begin
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                   --5.00%-- iov_iter_fault_in_readable
                                             generic_perform_write
                                             generic_file_buffered_write
                                             __generic_file_aio_write
                                             generic_file_aio_write
                                             ext4_file_write
                                             do_sync_write
                                             vfs_write
                                             sys_write
                                             ia32_sysret
                                             0xf77904be
                                             __write_nocancel

     0.12%         swapper  [kernel.kallsyms]           [k] tick_nohz_stop_sched_tick
                   |
                   --- tick_nohz_stop_sched_tick
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.12%          iozone  [kernel.kallsyms]           [k] alloc_pages_current
                    |
                    --- alloc_pages_current
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.11%          iozone  [kernel.kallsyms]           [k] kmem_cache_alloc
                    |
                    --- kmem_cache_alloc
                       |          
                       |--94.29%-- alloc_buffer_head
                       |          alloc_page_buffers
                       |          create_empty_buffers
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--4.29%-- radix_tree_preload
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --1.43%-- mempool_alloc
                                  get_request
                                  get_request_wait
                                  __make_request
                                  generic_make_request.part.52
                                  submit_bio
                                  ext4_io_submit
                                  io_submit_add_bh
                                  ext4_bio_write_page
                                  mpage_da_submit_io
                                  mpage_da_map_and_submit
                                  ext4_da_writepages
                                  __filemap_fdatawrite_range
                                  filemap_write_and_wait_range
                                  ext4_sync_file
                                  do_fsync
                                  sys_fsync
                                  ia32_sysret
                                  __fsync_nocancel
                                  0x8057120
                                  0x805771a
                                  0x80928e6
                                  __libc_start_main

     0.11%         kswapd0  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                   |
                   --- _raw_spin_unlock_irqrestore
                      |          
                      |--79.10%-- ata_scsi_queuecmd
                      |          scsi_dispatch_cmd
                      |          scsi_request_fn
                      |          blk_run_queue
                      |          scsi_run_queue
                      |          scsi_next_command
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--98.11%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          |          
                      |          |          |--23.08%-- _raw_spin_unlock_irq
                      |          |          |          |          
                      |          |          |          |--66.67%-- shrink_inactive_list
                      |          |          |          |          shrink_zone
                      |          |          |          |          balance_pgdat
                      |          |          |          |          kswapd
                      |          |          |          |          kthread
                      |          |          |          |          kernel_thread_helper
                      |          |          |          |          
                      |          |          |           --33.33%-- __remove_mapping
                      |          |          |                     shrink_page_list
                      |          |          |                     shrink_inactive_list
                      |          |          |                     shrink_zone
                      |          |          |                     balance_pgdat
                      |          |          |                     kswapd
                      |          |          |                     kthread
                      |          |          |                     kernel_thread_helper
                      |          |          |          
                      |          |          |--15.38%-- drop_buffers
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- free_hot_cold_page
                      |          |          |          __pagevec_free
                      |          |          |          free_page_list
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--5.77%-- kmem_cache_free
                      |          |          |          free_buffer_head
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--3.85%-- balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--3.85%-- prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--3.85%-- free_pages_prepare
                      |          |          |          free_hot_cold_page
                      |          |          |          __pagevec_free
                      |          |          |          free_page_list
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- __mem_cgroup_uncharge_common
                      |          |          |          __remove_mapping
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- _raw_spin_lock
                      |          |          |          put_super
                      |          |          |          prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- put_super
                      |          |          |          prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- get_index.isra.1
                      |          |          |          prio_tree_left
                      |          |          |          prio_tree_first
                      |          |          |          prio_tree_next
                      |          |          |          vma_prio_tree_next
                      |          |          |          page_referenced_file
                      |          |          |          page_referenced
                      |          |          |          page_check_references.isra.50
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- bit_spin_unlock
                      |          |          |          __mem_cgroup_uncharge_common
                      |          |          |          __remove_mapping
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- free_buffer_head
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- __put_super
                      |          |          |          put_super
                      |          |          |          prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- grab_super_passive
                      |          |          |          prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- up_read
                      |          |          |          drop_super
                      |          |          |          prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- page_evictable
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- put_page
                      |          |          |          drop_buffers
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--1.92%-- _raw_spin_unlock
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |           --1.92%-- mem_cgroup_charge_statistics.isra.28
                      |          |                     __mem_cgroup_uncharge_common
                      |          |                     __remove_mapping
                      |          |                     shrink_page_list
                      |          |                     shrink_inactive_list
                      |          |                     shrink_zone
                      |          |                     balance_pgdat
                      |          |                     kswapd
                      |          |                     kthread
                      |          |                     kernel_thread_helper
                      |          |          
                      |           --1.89%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     free_buffer_head
                      |                     try_to_free_buffers
                      |                     shrink_page_list
                      |                     shrink_inactive_list
                      |                     shrink_zone
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                      |--10.45%-- pagevec_lru_move_fn
                      |          drain_cpu_pagevecs
                      |          lru_add_drain
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--4.48%-- __rcu_process_callbacks
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--66.67%-- smp_apic_timer_interrupt
                      |          |          apic_timer_interrupt
                      |          |          |          
                      |          |          |--50.00%-- kmem_cache_free
                      |          |          |          free_buffer_head
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |           --50.00%-- _raw_spin_unlock_irq
                      |          |                     shrink_inactive_list
                      |          |                     shrink_zone
                      |          |                     balance_pgdat
                      |          |                     kswapd
                      |          |                     kthread
                      |          |                     kernel_thread_helper
                      |          |          
                      |           --33.33%-- do_IRQ
                      |                     ret_from_intr
                      |                     _raw_spin_unlock_irq
                      |                     shrink_inactive_list
                      |                     shrink_zone
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                      |--2.99%-- test_clear_page_writeback
                      |          end_page_writeback
                      |          put_io_page
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          _raw_spin_unlock_irq
                      |          |          
                      |          |--50.00%-- putback_lru_pages
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --50.00%-- shrink_inactive_list
                      |                     shrink_zone
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                       --2.99%-- blk_end_bidi_request
                                 scsi_io_completion
                                 blk_done_softirq
                                 __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 |          
                                 |--50.00%-- do_IRQ
                                 |          ret_from_intr
                                 |          get_scan_count
                                 |          shrink_zone
                                 |          balance_pgdat
                                 |          kswapd
                                 |          kthread
                                 |          kernel_thread_helper
                                 |          
                                  --50.00%-- smp_apic_timer_interrupt
                                            apic_timer_interrupt
                                            grab_super_passive
                                            prune_super
                                            shrink_slab
                                            balance_pgdat
                                            kswapd
                                            kthread
                                            kernel_thread_helper

     0.11%          iozone  [kernel.kallsyms]           [k] __alloc_pages_nodemask
                    |
                    --- __alloc_pages_nodemask
                       |          
                       |--98.48%-- alloc_pages_current
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --1.52%-- alloc_pages_vma
                                  do_wp_page
                                  handle_pte_fault
                                  do_page_fault
                                  page_fault
                                  memset

     0.10%          iozone  [kernel.kallsyms]           [k] __mark_inode_dirty
                    |
                    --- __mark_inode_dirty
                       |          
                       |--75.38%-- __block_commit_write.isra.22
                       |          block_write_end
                       |          generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --24.62%-- generic_write_end
                                  ext4_da_write_end
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.10%         swapper  [kernel.kallsyms]           [k] kmem_cache_free
                   |
                   --- kmem_cache_free
                      |          
                      |--85.71%-- ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--88.89%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --11.11%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--9.52%-- bio_free
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--83.33%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --16.67%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--1.59%-- __sg_free_table
                      |          __scsi_release_buffers
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                      |--1.59%-- scsi_pool_free_command.isra.13
                      |          __scsi_put_command
                      |          scsi_next_command
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --1.59%-- __scsi_put_command
                                 scsi_next_command
                                 scsi_io_completion
                                 blk_done_softirq
                                 __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 do_IRQ
                                 ret_from_intr
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.10%       flush-8:0  [kernel.kallsyms]           [k] ext4_num_dirty_pages.isra.35
                 |
                 --- ext4_num_dirty_pages.isra.35
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                    |          
                    |--74.19%-- wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --25.81%-- wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.09%         kswapd0  [kernel.kallsyms]           [k] grab_super_passive
                   |
                   --- grab_super_passive
                       prune_super
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.09%       flush-8:0  [kernel.kallsyms]           [k] __wake_up_bit
                 |
                 --- __wake_up_bit
                    |          
                    |--61.82%-- ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--61.76%-- ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          |          
                    |          |          |--90.48%-- wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --9.52%-- wb_check_old_data_flush
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --38.24%-- write_cache_pages_da
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     |          
                    |                     |--69.23%-- wb_do_writeback
                    |                     |          bdi_writeback_thread
                    |                     |          kthread
                    |                     |          kernel_thread_helper
                    |                     |          
                    |                      --30.77%-- wb_check_old_data_flush
                    |                                wb_do_writeback
                    |                                bdi_writeback_thread
                    |                                kthread
                    |                                kernel_thread_helper
                    |          
                    |--29.09%-- ext4_num_dirty_pages.isra.35
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--81.25%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --18.75%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--3.64%-- mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                    |--1.82%-- ext4_alloc_branch
                    |          ext4_ind_map_blocks
                    |          ext4_map_blocks
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                    |--1.82%-- __block_write_full_page
                    |          __writepage
                    |          write_cache_pages
                    |          generic_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --1.82%-- put_io_page
                               ext4_end_bio
                               blk_update_request
                               blk_update_bidi_request
                               blk_end_bidi_request
                               scsi_io_completion
                               blk_done_softirq
                               __do_softirq
                               call_softirq
                               do_softirq
                               irq_exit
                               do_IRQ
                               ret_from_intr
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.08%          iozone  [kernel.kallsyms]           [k] lookup_bh_lru
                    |
                    --- lookup_bh_lru
                       |          
                       |--92.16%-- __find_get_block
                       |          |          
                       |          |--57.45%-- __getblk
                       |          |          |          
                       |          |          |--70.37%-- ext4_get_branch
                       |          |          |          ext4_ind_map_blocks
                       |          |          |          ext4_map_blocks
                       |          |          |          ext4_da_get_block_prep
                       |          |          |          __block_write_begin
                       |          |          |          ext4_da_write_begin
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |           --29.63%-- __ext4_get_inode_loc
                       |          |                     ext4_reserve_inode_write
                       |          |                     ext4_mark_inode_dirty
                       |          |                     ext4_dirty_inode
                       |          |                     __mark_inode_dirty
                       |          |                     generic_write_end
                       |          |                     ext4_da_write_end
                       |          |                     generic_perform_write
                       |          |                     generic_file_buffered_write
                       |          |                     __generic_file_aio_write
                       |          |                     generic_file_aio_write
                       |          |                     ext4_file_write
                       |          |                     do_sync_write
                       |          |                     vfs_write
                       |          |                     sys_write
                       |          |                     ia32_sysret
                       |          |                     0xf77904be
                       |          |                     __write_nocancel
                       |          |          
                       |           --42.55%-- ext4_free_blocks
                       |                     ext4_clear_blocks
                       |                     ext4_free_data
                       |                     ext4_free_branches.part.14
                       |                     ext4_free_branches.part.14
                       |                     ext4_ind_truncate
                       |                     ext4_truncate.part.38
                       |                     |          
                       |                     |--80.00%-- ext4_evict_inode
                       |                     |          evict
                       |                     |          do_unlinkat
                       |                     |          ia32_sysret
                       |                     |          __GI___unlink
                       |                     |          
                       |                      --20.00%-- ext4_setattr
                       |                                notify_change
                       |                                do_truncate
                       |                                do_sys_ftruncate.constprop.13
                       |                                ia32_sysret
                       |                                __GI___ftruncate
                       |          
                        --7.84%-- 0x296
                                  __write_nocancel

     0.08%          iozone  [kernel.kallsyms]           [k] __block_write_begin
                    |
                    --- __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.08%       flush-8:0  [kernel.kallsyms]           [k] io_submit_add_bh
                 |
                 --- io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--65.31%-- ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--59.38%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --40.62%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --34.69%-- write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--76.47%-- wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --23.53%-- wb_check_old_data_flush
                                          wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.07%         kswapd0  [kernel.kallsyms]           [k] free_buffer_head
                   |
                   --- free_buffer_head
                       try_to_free_buffers
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.07%         kswapd0  [kernel.kallsyms]           [k] prune_super
                   |
                   --- prune_super
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.07%          iozone  [kernel.kallsyms]           [k] mark_buffer_dirty
                    |
                    --- mark_buffer_dirty
                       |          
                       |--69.77%-- __ext4_handle_dirty_metadata
                       |          ext4_do_update_inode
                       |          ext4_mark_iloc_dirty
                       |          ext4_mark_inode_dirty
                       |          ext4_dirty_inode
                       |          __mark_inode_dirty
                       |          generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --30.23%-- __block_commit_write.isra.22
                                  block_write_end
                                  generic_write_end
                                  ext4_da_write_end
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.07%       flush-8:0  [kernel.kallsyms]           [k] __lookup_tag
                 |
                 --- __lookup_tag
                     radix_tree_gang_lookup_tag_slot
                     find_get_pages_tag
                     pagevec_lookup_tag
                    |          
                    |--61.90%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--73.08%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --26.92%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --38.10%-- ext4_num_dirty_pages.isra.35
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--68.75%-- wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --31.25%-- wb_check_old_data_flush
                                          wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.07%       flush-8:0  [kernel.kallsyms]           [k] mpage_da_submit_io
                 |
                 --- mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--51.22%-- ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--61.90%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --38.10%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --48.78%-- write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--65.00%-- wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --35.00%-- wb_check_old_data_flush
                                          wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.06%          iozone  [kernel.kallsyms]           [k] prep_new_page
                    |
                    --- prep_new_page
                        get_page_from_freelist
                        __alloc_pages_nodemask
                       |          
                       |--97.50%-- alloc_pages_current
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --2.50%-- alloc_pages_vma
                                  do_huge_pmd_anonymous_page
                                  do_page_fault
                                  page_fault
                                  memset

     0.06%         swapper  [kernel.kallsyms]           [k] run_timer_softirq
                   |
                   --- run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.06%          iozone  [kernel.kallsyms]           [k] generic_perform_write
                    |
                    --- generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.06%          iozone  [kernel.kallsyms]           [k] ext4_do_update_inode
                    |
                    --- ext4_do_update_inode
                        ext4_mark_iloc_dirty
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.06%       flush-8:0  [kernel.kallsyms]           [k] kmem_cache_alloc
                 |
                 --- kmem_cache_alloc
                    |          
                    |--78.95%-- ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--50.00%-- write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          |          
                    |          |          |--73.33%-- wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --26.67%-- wb_check_old_data_flush
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --50.00%-- ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     |          
                    |                     |--86.67%-- wb_do_writeback
                    |                     |          bdi_writeback_thread
                    |                     |          kthread
                    |                     |          kernel_thread_helper
                    |                     |          
                    |                      --13.33%-- wb_check_old_data_flush
                    |                                wb_do_writeback
                    |                                bdi_writeback_thread
                    |                                kthread
                    |                                kernel_thread_helper
                    |          
                    |--10.53%-- bvec_alloc_bs
                    |          bio_alloc_bioset
                    |          bio_alloc
                    |          io_submit_init.isra.4
                    |          io_submit_add_bh
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                    |--2.63%-- 0xffff88003c4378b8
                    |          
                    |--2.63%-- alloc_buffer_head
                    |          alloc_page_buffers
                    |          grow_dev_page
                    |          __getblk_slow
                    |          ext4_alloc_branch
                    |          ext4_ind_map_blocks
                    |          ext4_map_blocks
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                    |--2.63%-- ext4_init_io_end
                    |          io_submit_init.isra.4
                    |          io_submit_add_bh
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --2.63%-- mempool_alloc
                               bio_alloc_bioset
                               bio_alloc
                               io_submit_init.isra.4
                               io_submit_add_bh
                               ext4_bio_write_page
                               mpage_da_submit_io
                               mpage_da_map_and_submit
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.06%       flush-8:0  [kernel.kallsyms]           [k] find_get_pages
                 |
                 --- find_get_pages
                     pagevec_lookup
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--78.38%-- ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--75.86%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --24.14%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --21.62%-- write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.06%       flush-8:0  [kernel.kallsyms]           [k] clear_page_dirty_for_io
                 |
                 --- clear_page_dirty_for_io
                    |          
                    |--94.44%-- mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--55.88%-- ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          |          
                    |          |          |--84.21%-- wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --15.79%-- wb_check_old_data_flush
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --44.12%-- write_cache_pages_da
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     |          
                    |                     |--60.00%-- wb_do_writeback
                    |                     |          bdi_writeback_thread
                    |                     |          kthread
                    |                     |          kernel_thread_helper
                    |                     |          
                    |                      --40.00%-- wb_check_old_data_flush
                    |                                wb_do_writeback
                    |                                bdi_writeback_thread
                    |                                kthread
                    |                                kernel_thread_helper
                    |          
                    |--2.78%-- 0xffff88003c437958
                    |          
                     --2.78%-- 0xffff88003c4378f8

     0.05%          iozone  libc-2.14.1.so              [.] __random_r
                    |
                    --- __random_r
                       |          
                        --100.00%-- __libc_start_main

     0.05%          iozone  [kernel.kallsyms]           [k] radix_tree_lookup_element
                    |
                    --- radix_tree_lookup_element
                        find_get_page
                       |          
                       |--69.70%-- find_lock_page
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--27.27%-- __find_get_block_slow.isra.19
                       |          |          
                       |          |--55.56%-- __find_get_block
                       |          |          |          
                       |          |          |--80.00%-- ext4_free_blocks
                       |          |          |          ext4_clear_blocks
                       |          |          |          ext4_free_data
                       |          |          |          ext4_free_branches.part.14
                       |          |          |          ext4_free_branches.part.14
                       |          |          |          ext4_ind_truncate
                       |          |          |          ext4_truncate.part.38
                       |          |          |          ext4_evict_inode
                       |          |          |          evict
                       |          |          |          do_unlinkat
                       |          |          |          ia32_sysret
                       |          |          |          __GI___unlink
                       |          |          |          
                       |          |           --20.00%-- __getblk
                       |          |                     ext4_get_branch
                       |          |                     ext4_ind_map_blocks
                       |          |                     ext4_map_blocks
                       |          |                     ext4_da_get_block_prep
                       |          |                     __block_write_begin
                       |          |                     ext4_da_write_begin
                       |          |                     generic_perform_write
                       |          |                     generic_file_buffered_write
                       |          |                     __generic_file_aio_write
                       |          |                     generic_file_aio_write
                       |          |                     ext4_file_write
                       |          |                     do_sync_write
                       |          |                     vfs_write
                       |          |                     sys_write
                       |          |                     ia32_sysret
                       |          |                     0xf77904be
                       |          |                     __write_nocancel
                       |          |          
                       |           --44.44%-- unmap_underlying_metadata
                       |                     __block_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                        --3.03%-- ext4_mb_load_buddy
                                  ext4_free_blocks
                                  ext4_free_branches.part.14
                                  ext4_free_branches.part.14
                                  ext4_ind_truncate
                                  ext4_truncate.part.38
                                  ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.05%          iozone  [kernel.kallsyms]           [k] alloc_page_buffers
                    |
                    --- alloc_page_buffers
                        create_empty_buffers
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.05%         kswapd0  [kernel.kallsyms]           [k] shrink_page_list
                   |
                   --- shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.05%          iozone  [kernel.kallsyms]           [k] ext4_da_get_block_prep
                    |
                    --- ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.05%       flush-8:0  [kernel.kallsyms]           [k] __bio_add_page.part.14
                 |
                 --- __bio_add_page.part.14
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--58.06%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--77.78%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --22.22%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --41.94%-- ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--61.54%-- wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --38.46%-- wb_check_old_data_flush
                                          wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.05%          iozone  [kernel.kallsyms]           [k] __ext4_get_inode_loc
                    |
                    --- __ext4_get_inode_loc
                        ext4_reserve_inode_write
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.05%       flush-8:0  [kernel.kallsyms]           [k] ext4_bio_write_page
                 |
                 --- ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--51.72%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--73.33%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --26.67%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --48.28%-- ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.04%       flush-8:0  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                 |
                 --- _raw_spin_unlock_irq
                    |          
                    |--35.71%-- scsi_request_fn
                    |          |          
                    |          |--70.00%-- __make_request
                    |          |          generic_make_request.part.52
                    |          |          submit_bio
                    |          |          ext4_io_submit
                    |          |          |          
                    |          |          |--57.14%-- io_submit_add_bh
                    |          |          |          ext4_bio_write_page
                    |          |          |          mpage_da_submit_io
                    |          |          |          mpage_da_map_and_submit
                    |          |          |          ext4_da_writepages
                    |          |          |          writeback_single_inode
                    |          |          |          writeback_sb_inodes
                    |          |          |          __writeback_inodes_wb
                    |          |          |          wb_writeback
                    |          |          |          |          
                    |          |          |          |--75.00%-- wb_do_writeback
                    |          |          |          |          bdi_writeback_thread
                    |          |          |          |          kthread
                    |          |          |          |          kernel_thread_helper
                    |          |          |          |          
                    |          |          |           --25.00%-- wb_check_old_data_flush
                    |          |          |                     wb_do_writeback
                    |          |          |                     bdi_writeback_thread
                    |          |          |                     kthread
                    |          |          |                     kernel_thread_helper
                    |          |          |          
                    |          |           --42.86%-- mpage_da_submit_io
                    |          |                     mpage_da_map_and_submit
                    |          |                     |          
                    |          |                     |--66.67%-- write_cache_pages_da
                    |          |                     |          ext4_da_writepages
                    |          |                     |          writeback_single_inode
                    |          |                     |          writeback_sb_inodes
                    |          |                     |          __writeback_inodes_wb
                    |          |                     |          wb_writeback
                    |          |                     |          |          
                    |          |                     |          |--50.00%-- wb_do_writeback
                    |          |                     |          |          bdi_writeback_thread
                    |          |                     |          |          kthread
                    |          |                     |          |          kernel_thread_helper
                    |          |                     |          |          
                    |          |                     |           --50.00%-- wb_check_old_data_flush
                    |          |                     |                     wb_do_writeback
                    |          |                     |                     bdi_writeback_thread
                    |          |                     |                     kthread
                    |          |                     |                     kernel_thread_helper
                    |          |                     |          
                    |          |                      --33.33%-- ext4_da_writepages
                    |          |                                writeback_single_inode
                    |          |                                writeback_sb_inodes
                    |          |                                __writeback_inodes_wb
                    |          |                                wb_writeback
                    |          |                                wb_do_writeback
                    |          |                                bdi_writeback_thread
                    |          |                                kthread
                    |          |                                kernel_thread_helper
                    |          |          
                    |          |--20.00%-- blk_run_queue
                    |          |          scsi_run_queue
                    |          |          scsi_next_command
                    |          |          scsi_io_completion
                    |          |          blk_done_softirq
                    |          |          __do_softirq
                    |          |          call_softirq
                    |          |          do_softirq
                    |          |          irq_exit
                    |          |          do_IRQ
                    |          |          ret_from_intr
                    |          |          |          
                    |          |          |--50.00%-- inc_zone_page_state
                    |          |          |          test_set_page_writeback
                    |          |          |          ext4_bio_write_page
                    |          |          |          mpage_da_submit_io
                    |          |          |          mpage_da_map_and_submit
                    |          |          |          write_cache_pages_da
                    |          |          |          ext4_da_writepages
                    |          |          |          writeback_single_inode
                    |          |          |          writeback_sb_inodes
                    |          |          |          __writeback_inodes_wb
                    |          |          |          wb_writeback
                    |          |          |          wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --50.00%-- __wake_up_bit
                    |          |                     ext4_bio_write_page
                    |          |                     mpage_da_submit_io
                    |          |                     mpage_da_map_and_submit
                    |          |                     ext4_da_writepages
                    |          |                     writeback_single_inode
                    |          |                     writeback_sb_inodes
                    |          |                     __writeback_inodes_wb
                    |          |                     wb_writeback
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --10.00%-- queue_unplugged
                    |                     blk_flush_plug_list
                    |                     blk_finish_plug
                    |                     generic_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--25.00%-- get_request
                    |          get_request_wait
                    |          __make_request
                    |          generic_make_request.part.52
                    |          submit_bio
                    |          |          
                    |          |--85.71%-- ext4_io_submit
                    |          |          |          
                    |          |          |--50.00%-- mpage_da_submit_io
                    |          |          |          mpage_da_map_and_submit
                    |          |          |          write_cache_pages_da
                    |          |          |          ext4_da_writepages
                    |          |          |          writeback_single_inode
                    |          |          |          writeback_sb_inodes
                    |          |          |          __writeback_inodes_wb
                    |          |          |          wb_writeback
                    |          |          |          wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --50.00%-- io_submit_add_bh
                    |          |                     ext4_bio_write_page
                    |          |                     mpage_da_submit_io
                    |          |                     mpage_da_map_and_submit
                    |          |                     ext4_da_writepages
                    |          |                     writeback_single_inode
                    |          |                     writeback_sb_inodes
                    |          |                     __writeback_inodes_wb
                    |          |                     wb_writeback
                    |          |                     |          
                    |          |                     |--66.67%-- wb_check_old_data_flush
                    |          |                     |          wb_do_writeback
                    |          |                     |          bdi_writeback_thread
                    |          |                     |          kthread
                    |          |                     |          kernel_thread_helper
                    |          |                     |          
                    |          |                      --33.33%-- wb_do_writeback
                    |          |                                bdi_writeback_thread
                    |          |                                kthread
                    |          |                                kernel_thread_helper
                    |          |          
                    |           --14.29%-- submit_bh
                    |                     __block_write_full_page
                    |                     __writepage
                    |                     write_cache_pages
                    |                     generic_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--21.43%-- __make_request
                    |          generic_make_request.part.52
                    |          submit_bio
                    |          ext4_io_submit
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--66.67%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --33.33%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--14.29%-- finish_task_switch
                    |          thread_return
                    |          |          
                    |          |--75.00%-- preempt_schedule_irq
                    |          |          retint_kernel
                    |          |          |          
                    |          |          |--33.33%-- find_get_pages_tag
                    |          |          |          pagevec_lookup_tag
                    |          |          |          write_cache_pages_da
                    |          |          |          ext4_da_writepages
                    |          |          |          writeback_single_inode
                    |          |          |          writeback_sb_inodes
                    |          |          |          __writeback_inodes_wb
                    |          |          |          wb_writeback
                    |          |          |          wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |          |--33.33%-- mpage_da_submit_io
                    |          |          |          mpage_da_map_and_submit
                    |          |          |          ext4_da_writepages
                    |          |          |          writeback_single_inode
                    |          |          |          writeback_sb_inodes
                    |          |          |          __writeback_inodes_wb
                    |          |          |          wb_writeback
                    |          |          |          wb_check_old_data_flush
                    |          |          |          wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --33.33%-- kmem_cache_alloc
                    |          |                     ext4_bio_write_page
                    |          |                     mpage_da_submit_io
                    |          |                     mpage_da_map_and_submit
                    |          |                     ext4_da_writepages
                    |          |                     writeback_single_inode
                    |          |                     writeback_sb_inodes
                    |          |                     __writeback_inodes_wb
                    |          |                     wb_writeback
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --25.00%-- schedule_timeout
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --3.57%-- __set_page_dirty
                               mark_buffer_dirty_inode
                               __ext4_handle_dirty_metadata
                               ext4_alloc_branch
                               ext4_ind_map_blocks
                               ext4_map_blocks
                               mpage_da_map_and_submit
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.04%         kswapd0  [kernel.kallsyms]           [k] __mem_cgroup_uncharge_common
                   |
                   --- __mem_cgroup_uncharge_common
                       __remove_mapping
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.04%          iozone  [kernel.kallsyms]           [k] __mem_cgroup_try_charge
                    |
                    --- __mem_cgroup_try_charge
                        mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.04%          iozone  [kernel.kallsyms]           [k] mb_free_blocks
                    |
                    --- mb_free_blocks
                        ext4_free_blocks
                        ext4_clear_blocks
                        ext4_free_data
                        ext4_free_branches.part.14
                        ext4_free_branches.part.14
                        ext4_ind_truncate
                        ext4_truncate.part.38
                       |          
                       |--66.67%-- ext4_evict_inode
                       |          evict
                       |          do_unlinkat
                       |          ia32_sysret
                       |          __GI___unlink
                       |          
                        --33.33%-- ext4_setattr
                                  notify_change
                                  do_truncate
                                  do_sys_ftruncate.constprop.13
                                  ia32_sysret
                                  __GI___ftruncate

     0.04%         swapper  [kernel.kallsyms]           [k] call_timer_fn
                   |
                   --- call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.04%          iozone  libc-2.14.1.so              [.] __i686.get_pc_thunk.bx
                    |
                    --- __i686.get_pc_thunk.bx
                        __libc_start_main

     0.04%          iozone  iozone                      [.] 0x47573         
                    |
                    --- 0x80594da
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

                    |
                    --- 0x8049a94
                        __libc_start_main

                    |
                    --- 0x8059502
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

                    |
                    --- 0x808f573
                        __libc_start_main

                    |
                    --- 0x808f56a
                        __libc_start_main

                    |
                    --- 0x808f567
                        __libc_start_main

                    |
                    --- 0x8059511
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

                    |
                    --- 0x80594e0
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

                    |
                    --- 0x805951e
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

                    |
                    --- 0x805988e
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

                    |
                    --- 0x805a663
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

                    |
                    --- 0x805999b
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

                    |
                    --- 0x804bb9c
                        0x8059827
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

     0.04%          iozone  [kernel.kallsyms]           [k] iov_iter_copy_from_user_atomic
                    |
                    --- iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.04%          iozone  [kernel.kallsyms]           [k] lookup_page_cgroup
                    |
                    --- lookup_page_cgroup
                       |          
                       |--76.92%-- __mem_cgroup_commit_charge_lrucare
                       |          mem_cgroup_cache_charge
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--19.23%-- mem_cgroup_lru_add_after_commit
                       |          mem_cgroup_cache_charge
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --3.85%-- __mem_cgroup_uncharge_common
                                  delete_from_page_cache
                                  truncate_inode_page
                                  truncate_inode_pages_range
                                  truncate_pagecache
                                  ext4_setattr
                                  notify_change
                                  do_truncate
                                  do_sys_ftruncate.constprop.13
                                  ia32_sysret
                                  __GI___ftruncate

     0.04%          iozone  [kernel.kallsyms]           [k] ext4_ind_map_blocks
                    |
                    --- ext4_ind_map_blocks
                        ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.04%         swapper  [kernel.kallsyms]           [k] default_idle
                   |
                   --- default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.04%         swapper  [kernel.kallsyms]           [k] ext4_end_bio
                   |
                   --- ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--80.00%-- do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --20.00%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.04%         kswapd0  [kernel.kallsyms]           [k] _raw_spin_lock
                   |
                   --- _raw_spin_lock
                      |          
                      |--60.00%-- put_super
                      |          prune_super
                      |          shrink_slab
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--20.00%-- try_to_free_buffers
                      |          shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--12.00%-- grab_super_passive
                      |          prune_super
                      |          shrink_slab
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                       --8.00%-- mem_cgroup_soft_limit_reclaim
                                 balance_pgdat
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.04%          iozone  [kernel.kallsyms]           [k] ext4_map_blocks
                    |
                    --- ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.04%          iozone  [kernel.kallsyms]           [k] ext4_get_branch
                    |
                    --- ext4_get_branch
                        ext4_ind_map_blocks
                        ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.04%          iozone  [kernel.kallsyms]           [k] ext4_da_reserve_space
                    |
                    --- ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.04%         swapper  [kernel.kallsyms]           [k] tick_nohz_restart_sched_tick
                   |
                   --- tick_nohz_restart_sched_tick
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.04%          iozone  libc-2.14.1.so              [.] __random
                    |
                    --- __random
                        __libc_start_main

     0.04%          iozone  [kernel.kallsyms]           [k] memset
                    |
                    --- memset
                        kmem_cache_alloc
                        alloc_buffer_head
                        alloc_page_buffers
                        create_empty_buffers
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.04%       flush-8:0  [kernel.kallsyms]           [k] page_waitqueue
                 |
                 --- page_waitqueue
                     unlock_page
                    |          
                    |--78.26%-- ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--66.67%-- write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          |          
                    |          |          |--58.33%-- wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --41.67%-- wb_check_old_data_flush
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --33.33%-- ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     |          
                    |                     |--83.33%-- wb_do_writeback
                    |                     |          bdi_writeback_thread
                    |                     |          kthread
                    |                     |          kernel_thread_helper
                    |                     |          
                    |                      --16.67%-- wb_check_old_data_flush
                    |                                wb_do_writeback
                    |                                bdi_writeback_thread
                    |                                kthread
                    |                                kernel_thread_helper
                    |          
                    |--17.39%-- ext4_num_dirty_pages.isra.35
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --4.35%-- __block_write_full_page
                               __writepage
                               write_cache_pages
                               generic_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.04%          mysqld  mysqld                      [.] 0x4340b7        
                    |
                    --- 0x83a28e

                    |
                    --- 0x8340b7
                        (nil)

                    |
                    --- 0x8f470d

                    |
                    --- 0x5d647a

                    |
                    --- 0x88a809

                    |
                    --- 0x83409c
                        (nil)

     0.04%          iozone  [kernel.kallsyms]           [k] balance_dirty_pages.isra.15
                    |
                    --- balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.03%           rcuc0  [kernel.kallsyms]           [k] kmem_cache_free
                     |
                     --- kmem_cache_free
                         rcu_do_batch.isra.20
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.03%          iozone  [kernel.kallsyms]           [k] __rcu_read_unlock
                    |
                    --- __rcu_read_unlock
                       |          
                       |--52.38%-- __mem_cgroup_try_charge
                       |          mem_cgroup_cache_charge
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--42.86%-- find_get_page
                       |          |          
                       |          |--66.67%-- __find_get_block_slow.isra.19
                       |          |          |          
                       |          |          |--83.33%-- unmap_underlying_metadata
                       |          |          |          __block_write_begin
                       |          |          |          ext4_da_write_begin
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |           --16.67%-- __find_get_block
                       |          |                     ext4_free_blocks
                       |          |                     ext4_clear_blocks
                       |          |                     ext4_free_data
                       |          |                     ext4_free_branches.part.14
                       |          |                     ext4_free_branches.part.14
                       |          |                     ext4_ind_truncate
                       |          |                     ext4_truncate.part.38
                       |          |                     ext4_evict_inode
                       |          |                     evict
                       |          |                     do_unlinkat
                       |          |                     ia32_sysret
                       |          |                     __GI___unlink
                       |          |          
                       |           --33.33%-- find_lock_page
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                        --4.76%-- bdi_dirty_limit
                                  balance_dirty_pages.isra.15
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.03%          iozone  [kernel.kallsyms]           [k] copy_page
                    |
                    --- copy_page
                        migrate_page_copy
                       |          
                       |--66.67%-- migrate_page
                       |          move_to_new_page
                       |          unmap_and_move
                       |          migrate_pages
                       |          compact_zone.part.15
                       |          compact_zone_order
                       |          try_to_compact_pages
                       |          __alloc_pages_direct_compact
                       |          __alloc_pages_nodemask
                       |          alloc_pages_vma
                       |          do_huge_pmd_anonymous_page
                       |          do_page_fault
                       |          page_fault
                       |          memset
                       |          
                        --33.33%-- buffer_migrate_page
                                  move_to_new_page
                                  unmap_and_move
                                  migrate_pages
                                  compact_zone.part.15
                                  compact_zone_order
                                  try_to_compact_pages
                                  __alloc_pages_direct_compact
                                  __alloc_pages_nodemask
                                  alloc_pages_vma
                                  do_huge_pmd_anonymous_page
                                  do_page_fault
                                  page_fault
                                  memset

     0.03%     packagekitd  [kernel.kallsyms]           [k] copy_page
               |
               --- copy_page
                  |          
                  |--90.00%-- migrate_page_copy
                  |          migrate_page
                  |          move_to_new_page
                  |          unmap_and_move
                  |          migrate_pages
                  |          compact_zone.part.15
                  |          compact_zone_order
                  |          try_to_compact_pages
                  |          __alloc_pages_direct_compact
                  |          __alloc_pages_nodemask
                  |          alloc_pages_vma
                  |          do_huge_pmd_anonymous_page
                  |          do_page_fault
                  |          page_fault
                  |          0x7fd2666fda41
                  |          __mutex_open_rpmdb
                  |          
                   --10.00%-- do_wp_page
                             handle_pte_fault
                             do_page_fault
                             page_fault
                             |          
                             |--50.00%-- 0x7fd266e89d5b
                             |          std::basic_streambuf<char, std::char_traits<char> >::xsputn(char const*, long)
                             |          
                              --50.00%-- 0x7fd266e8b589
                                        std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&)

     0.03%          iozone  [kernel.kallsyms]           [k] __block_commit_write.isra.22
                    |
                    --- __block_commit_write.isra.22
                        block_write_end
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.03%          iozone  [kernel.kallsyms]           [k] create_empty_buffers
                    |
                    --- create_empty_buffers
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.03%          iozone  [kernel.kallsyms]           [k] _raw_spin_lock
                    |
                    --- _raw_spin_lock
                       |          
                       |--47.37%-- ext4_da_reserve_space
                       |          ext4_da_get_block_prep
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--26.32%-- inode_add_rsv_space
                       |          __dquot_alloc_space
                       |          ext4_da_reserve_space
                       |          ext4_da_get_block_prep
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--21.05%-- create_empty_buffers
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --5.26%-- remove_migration_pte
                                  rmap_walk_anon
                                  rmap_walk
                                  move_to_new_page
                                  unmap_and_move
                                  migrate_pages
                                  compact_zone.part.15
                                  compact_zone_order
                                  try_to_compact_pages
                                  __alloc_pages_direct_compact
                                  __alloc_pages_nodemask
                                  alloc_pages_vma
                                  do_huge_pmd_anonymous_page
                                  do_page_fault
                                  page_fault
                                  memset

     0.03%         swapper  [kernel.kallsyms]           [k] wake_up_process
                   |
                   --- wake_up_process
                       call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.03%         swapper  [kernel.kallsyms]           [k] test_clear_page_writeback
                   |
                   --- test_clear_page_writeback
                       end_page_writeback
                       put_io_page
                       ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--94.12%-- do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --5.88%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.03%         kswapd0  [kernel.kallsyms]           [k] __do_softirq
                   |
                   --- __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--76.47%-- do_IRQ
                      |          ret_from_intr
                      |          |          
                      |          |--30.77%-- _raw_spin_unlock_irq
                      |          |          |          
                      |          |          |--75.00%-- shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |           --25.00%-- __remove_mapping
                      |          |                     shrink_page_list
                      |          |                     shrink_inactive_list
                      |          |                     shrink_zone
                      |          |                     balance_pgdat
                      |          |                     kswapd
                      |          |                     kthread
                      |          |                     kernel_thread_helper
                      |          |          
                      |          |--15.38%-- shrink_slab
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |          |--15.38%-- drop_buffers
                      |          |          try_to_free_buffers
                      |          |          shrink_page_list
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |          |--7.69%-- prune_super
                      |          |          shrink_slab
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |          |--7.69%-- __mem_cgroup_uncharge_common
                      |          |          __remove_mapping
                      |          |          shrink_page_list
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |          |--7.69%-- free_hot_cold_page
                      |          |          __pagevec_free
                      |          |          free_page_list
                      |          |          shrink_page_list
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |          |--7.69%-- drop_super
                      |          |          prune_super
                      |          |          shrink_slab
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --7.69%-- balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                       --23.53%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 |          
                                 |--50.00%-- _raw_spin_unlock_irq
                                 |          |          
                                 |          |--50.00%-- __remove_mapping
                                 |          |          shrink_page_list
                                 |          |          shrink_inactive_list
                                 |          |          shrink_zone
                                 |          |          balance_pgdat
                                 |          |          kswapd
                                 |          |          kthread
                                 |          |          kernel_thread_helper
                                 |          |          
                                 |           --50.00%-- shrink_inactive_list
                                 |                     shrink_zone
                                 |                     balance_pgdat
                                 |                     kswapd
                                 |                     kthread
                                 |                     kernel_thread_helper
                                 |          
                                 |--25.00%-- drop_buffers
                                 |          try_to_free_buffers
                                 |          shrink_page_list
                                 |          shrink_inactive_list
                                 |          shrink_zone
                                 |          balance_pgdat
                                 |          kswapd
                                 |          kthread
                                 |          kernel_thread_helper
                                 |          
                                  --25.00%-- grab_super_passive
                                            prune_super
                                            shrink_slab
                                            balance_pgdat
                                            kswapd
                                            kthread
                                            kernel_thread_helper

     0.03%         swapper  [kernel.kallsyms]           [k] hrtimer_run_pending
                   |
                   --- hrtimer_run_pending
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.03%     kworker/0:0  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
               |
               --- _raw_spin_unlock_irqrestore
                  |          
                  |--93.75%-- ata_scsi_queuecmd
                  |          scsi_dispatch_cmd
                  |          scsi_request_fn
                  |          |          
                  |          |--93.33%-- cfq_kick_queue
                  |          |          process_one_work
                  |          |          worker_thread
                  |          |          kthread
                  |          |          kernel_thread_helper
                  |          |          
                  |           --6.67%-- scsi_run_queue
                  |                     scsi_next_command
                  |                     scsi_io_completion
                  |                     blk_done_softirq
                  |                     __do_softirq
                  |                     call_softirq
                  |                     do_softirq
                  |                     irq_exit
                  |                     do_IRQ
                  |                     ret_from_intr
                  |                     _raw_spin_unlock_irqrestore
                  |                     ata_sff_hsm_move
                  |                     ata_sff_pio_task
                  |                     process_one_work
                  |                     worker_thread
                  |                     kthread
                  |                     kernel_thread_helper
                  |          
                   --6.25%-- ata_sff_hsm_move
                             ata_sff_pio_task
                             process_one_work
                             worker_thread
                             kthread
                             kernel_thread_helper

     0.03%         kswapd0  [kernel.kallsyms]           [k] get_pageblock_flags_group
                   |
                   --- get_pageblock_flags_group
                       free_hot_cold_page
                       __pagevec_free
                       free_page_list
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.03%         kswapd0  [kernel.kallsyms]           [k] balance_pgdat
                   |
                   --- balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.03%         kswapd0  [kernel.kallsyms]           [k] _raw_spin_unlock
                   |
                   --- _raw_spin_unlock
                      |          
                      |--43.75%-- grab_super_passive
                      |          prune_super
                      |          shrink_slab
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--43.75%-- prune_super
                      |          shrink_slab
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--6.25%-- try_to_free_buffers
                      |          shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                       --6.25%-- mem_cgroup_soft_limit_reclaim
                                 balance_pgdat
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.03%          iozone  [kernel.kallsyms]           [k] ext4_has_free_blocks
                    |
                    --- ext4_has_free_blocks
                        ext4_claim_free_blocks
                        ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.03%          iozone  [kernel.kallsyms]           [k] ext4_da_write_end
                    |
                    --- ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.03%             gpg  libgcrypt.so.11.7.0         [.] 0x8136          
               |
               --- 0x7f15b9dd8136

               |
               --- 0x7ff721edf95e

               |
               --- 0x7ff721e98310

               |
               --- 0x7f5b271d61a5

               |
               --- 0x7f5b2721198a

               |
               --- 0x7f5b27214bdc

               |
               --- 0x7fbd6f26cc23

               |
               --- 0x7f593a9d39eb

               |
               --- 0x7f593a9d39dd

               |
               --- 0x7f39b8a9578b

               |
               --- 0x7f39b8a9cbdf

               |
               --- 0x7f78f8a126f8

               |
               --- 0x7f6fe2daddac

               |
               --- 0x7f6fe2dadc23

               |
               --- 0x7f6fe2daa9dd

               |
               --- 0x7f511c26ec8b

     0.02%          iozone  [kernel.kallsyms]           [k] grab_cache_page_write_begin
                    |
                    --- grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.02%          iozone  [kernel.kallsyms]           [k] mark_page_accessed
                    |
                    --- mark_page_accessed
                       |          
                       |--86.67%-- __find_get_block
                       |          __getblk
                       |          |          
                       |          |--92.31%-- ext4_get_branch
                       |          |          ext4_ind_map_blocks
                       |          |          ext4_map_blocks
                       |          |          ext4_da_get_block_prep
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --7.69%-- __ext4_get_inode_loc
                       |                     ext4_reserve_inode_write
                       |                     ext4_mark_inode_dirty
                       |                     ext4_dirty_inode
                       |                     __mark_inode_dirty
                       |                     generic_write_end
                       |                     ext4_da_write_end
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                        --13.33%-- generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.02%          iozone  [kernel.kallsyms]           [k] ext4_journal_start_sb
                    |
                    --- ext4_journal_start_sb
                       |          
                       |--86.67%-- ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --13.33%-- ext4_dirty_inode
                                  __mark_inode_dirty
                                  generic_write_end
                                  ext4_da_write_end
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.02%          iozone  [kernel.kallsyms]           [k] ext4_block_to_path.isra.9
                    |
                    --- ext4_block_to_path.isra.9
                        ext4_ind_map_blocks
                        ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.02%         swapper  [kernel.kallsyms]           [k] dec_zone_page_state
                   |
                   --- dec_zone_page_state
                       test_clear_page_writeback
                       end_page_writeback
                       put_io_page
                       ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.02%         kswapd0  [kernel.kallsyms]           [k] __page_check_address
                   |
                   --- __page_check_address
                       page_referenced_one
                      |          
                      |--92.86%-- page_referenced_file
                      |          page_referenced
                      |          |          
                      |          |--53.85%-- shrink_active_list.isra.56
                      |          |          shrink_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --46.15%-- page_check_references.isra.50
                      |                     shrink_page_list
                      |                     shrink_inactive_list
                      |                     shrink_zone
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                       --7.14%-- page_referenced_anon
                                 page_referenced
                                 shrink_active_list.isra.56
                                 balance_pgdat
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.02%         kswapd0  [kernel.kallsyms]           [k] try_to_free_buffers
                   |
                   --- try_to_free_buffers
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.02%         kswapd0  [kernel.kallsyms]           [k] ext4_releasepage
                   |
                   --- ext4_releasepage
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.02%          iozone  [kernel.kallsyms]           [k] __rcu_read_lock
                    |
                    --- __rcu_read_lock
                       |          
                       |--64.29%-- find_get_page
                       |          |          
                       |          |--66.67%-- __find_get_block_slow.isra.19
                       |          |          |          
                       |          |          |--66.67%-- __find_get_block
                       |          |          |          ext4_free_blocks
                       |          |          |          ext4_clear_blocks
                       |          |          |          ext4_free_data
                       |          |          |          ext4_free_branches.part.14
                       |          |          |          ext4_free_branches.part.14
                       |          |          |          ext4_ind_truncate
                       |          |          |          ext4_truncate.part.38
                       |          |          |          |          
                       |          |          |          |--50.00%-- ext4_setattr
                       |          |          |          |          notify_change
                       |          |          |          |          do_truncate
                       |          |          |          |          do_sys_ftruncate.constprop.13
                       |          |          |          |          ia32_sysret
                       |          |          |          |          __GI___ftruncate
                       |          |          |          |          
                       |          |          |           --50.00%-- ext4_evict_inode
                       |          |          |                     evict
                       |          |          |                     do_unlinkat
                       |          |          |                     ia32_sysret
                       |          |          |                     __GI___unlink
                       |          |          |          
                       |          |           --33.33%-- unmap_underlying_metadata
                       |          |                     __block_write_begin
                       |          |                     ext4_da_write_begin
                       |          |                     generic_perform_write
                       |          |                     generic_file_buffered_write
                       |          |                     __generic_file_aio_write
                       |          |                     generic_file_aio_write
                       |          |                     ext4_file_write
                       |          |                     do_sync_write
                       |          |                     vfs_write
                       |          |                     sys_write
                       |          |                     ia32_sysret
                       |          |                     0xf77904be
                       |          |                     __write_nocancel
                       |          |          
                       |           --33.33%-- find_lock_page
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                       |--28.57%-- __mem_cgroup_try_charge
                       |          mem_cgroup_cache_charge
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --7.14%-- prop_fraction_single
                                  balance_dirty_pages.isra.15
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.02%          iozone  [kernel.kallsyms]           [k] kmem_cache_free
                    |
                    --- kmem_cache_free
                       |          
                       |--71.43%-- ext4_end_bio
                       |          blk_update_request
                       |          blk_update_bidi_request
                       |          blk_end_bidi_request
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          do_IRQ
                       |          ret_from_intr
                       |          |          
                       |          |--50.00%-- copy_user_generic_unrolled
                       |          |          iov_iter_copy_from_user_atomic
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--10.00%-- ext4_claim_free_blocks
                       |          |          ext4_da_reserve_space
                       |          |          ext4_da_get_block_prep
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--10.00%-- __mem_cgroup_commit_charge
                       |          |          __mem_cgroup_commit_charge_lrucare
                       |          |          mem_cgroup_cache_charge
                       |          |          add_to_page_cache_locked
                       |          |          add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--10.00%-- alloc_buffer_head
                       |          |          alloc_page_buffers
                       |          |          create_empty_buffers
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--10.00%-- ext4_ind_map_blocks
                       |          |          ext4_map_blocks
                       |          |          ext4_da_get_block_prep
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --10.00%-- prep_new_page
                       |                     get_page_from_freelist
                       |                     __alloc_pages_nodemask
                       |                     alloc_pages_current
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                        --28.57%-- free_buffer_head
                                  try_to_free_buffers
                                  |          
                                  |--50.00%-- shrink_page_list
                                  |          shrink_inactive_list
                                  |          shrink_zone
                                  |          shrink_zones
                                  |          do_try_to_free_pages
                                  |          try_to_free_pages
                                  |          __alloc_pages_nodemask
                                  |          alloc_pages_vma
                                  |          do_huge_pmd_anonymous_page
                                  |          do_page_fault
                                  |          page_fault
                                  |          memset
                                  |          
                                   --50.00%-- truncate_inode_page
                                             truncate_inode_pages_range
                                             |          
                                             |--50.00%-- truncate_pagecache
                                             |          ext4_setattr
                                             |          notify_change
                                             |          do_truncate
                                             |          do_sys_ftruncate.constprop.13
                                             |          ia32_sysret
                                             |          __GI___ftruncate
                                             |          
                                              --50.00%-- ext4_evict_inode
                                                        evict
                                                        do_unlinkat
                                                        ia32_sysret
                                                        __GI___unlink

     0.02%          iozone  [kernel.kallsyms]           [k] __find_get_block
                    |
                    --- __find_get_block
                       |          
                       |--64.29%-- __getblk
                       |          |          
                       |          |--55.56%-- __ext4_get_inode_loc
                       |          |          ext4_reserve_inode_write
                       |          |          ext4_mark_inode_dirty
                       |          |          ext4_dirty_inode
                       |          |          __mark_inode_dirty
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --44.44%-- ext4_get_branch
                       |                     ext4_ind_map_blocks
                       |                     ext4_map_blocks
                       |                     ext4_da_get_block_prep
                       |                     __block_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                        --35.71%-- ext4_free_blocks
                                  ext4_clear_blocks
                                  ext4_free_data
                                  ext4_free_branches.part.14
                                  ext4_free_branches.part.14
                                  ext4_ind_truncate
                                  ext4_truncate.part.38
                                  |          
                                  |--60.00%-- ext4_evict_inode
                                  |          evict
                                  |          do_unlinkat
                                  |          ia32_sysret
                                  |          __GI___unlink
                                  |          
                                   --40.00%-- ext4_setattr
                                             notify_change
                                             do_truncate
                                             do_sys_ftruncate.constprop.13
                                             ia32_sysret
                                             __GI___ftruncate

     0.02%          iozone  [kernel.kallsyms]           [k] radix_tree_preload
                    |
                    --- radix_tree_preload
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.02%          iozone  [kernel.kallsyms]           [k] clear_page
                    |
                    --- clear_page
                       |          
                       |--84.62%-- clear_huge_page
                       |          __do_huge_pmd_anonymous_page
                       |          do_page_fault
                       |          page_fault
                       |          memset
                       |          
                        --15.38%-- prep_new_page
                                  get_page_from_freelist
                                  __alloc_pages_nodemask
                                  alloc_pages_vma
                                  do_wp_page
                                  handle_pte_fault
                                  do_page_fault
                                  page_fault
                                  |          
                                  |--50.00%-- 0x808f1c4
                                  |          0x808f1c4
                                  |          __libc_start_main
                                  |          
                                   --50.00%-- memset

     0.02%            gpg2  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
               |
               --- _raw_spin_unlock_irqrestore
                   ata_scsi_queuecmd
                   scsi_dispatch_cmd
                   scsi_request_fn
                  |          
                  |--69.23%-- blk_flush_plug_list
                  |          |          
                  |          |--88.89%-- blk_finish_plug
                  |          |          read_pages
                  |          |          __do_page_cache_readahead
                  |          |          ra_submit
                  |          |          filemap_fault
                  |          |          __do_fault
                  |          |          handle_pte_fault
                  |          |          do_page_fault
                  |          |          page_fault
                  |          |          |          
                  |          |          |--12.50%-- __clear_user
                  |          |          |          padzero
                  |          |          |          load_elf_interp
                  |          |          |          load_elf_binary
                  |          |          |          search_binary_handler
                  |          |          |          do_execve_common.isra.27
                  |          |          |          sys_execve
                  |          |          |          stub_execve
                  |          |          |          0x7fd26a96d0f7
                  |          |          |          0x7fd26a96d0f7
                  |          |          |          
                  |          |          |--12.50%-- 0x7f1506600708
                  |          |          |          _dl_map_object_from_fd
                  |          |          |          _dl_map_object
                  |          |          |          
                  |          |          |--12.50%-- 0x7f1506611996
                  |          |          |          memset
                  |          |          |          _dl_map_object
                  |          |          |          
                  |          |          |--12.50%-- 0x7f1506611993
                  |          |          |          memset
                  |          |          |          _dl_map_object
                  |          |          |          
                  |          |          |--12.50%-- 0x7f28f144c726
                  |          |          |          memset
                  |          |          |          _dl_map_object
                  |          |          |          
                  |          |          |--12.50%-- 0x7f28f144c996
                  |          |          |          memset
                  |          |          |          _dl_map_object
                  |          |          |          
                  |          |          |--12.50%-- 0x7f28f14402e2
                  |          |          |          _dl_relocate_object
                  |          |          |          dl_main
                  |          |          |          _dl_sysdep_start
                  |          |          |          
                  |          |           --12.50%-- 0x7f28f16b36c0
                  |          |                     0x7f28f16b36c0
                  |          |          
                  |           --11.11%-- io_schedule
                  |                     sleep_on_page_killable
                  |                     __wait_on_bit_lock
                  |                     __lock_page_killable
                  |                     do_generic_file_read.constprop.34
                  |                     generic_file_aio_read
                  |                     do_sync_read
                  |                     vfs_read
                  |                     kernel_read
                  |                     do_execve_common.isra.27
                  |                     sys_execve
                  |                     stub_execve
                  |                     0x7fd26a96d0f7
                  |                     __execve
                  |                     zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                  |                     (nil)
                  |          
                   --30.77%-- blk_run_queue
                             scsi_run_queue
                             scsi_next_command
                             scsi_io_completion
                             blk_done_softirq
                             __do_softirq
                             call_softirq
                             do_softirq
                             irq_exit
                             do_IRQ
                             ret_from_intr
                             |          
                             |--25.00%-- 0x7fd26ac627e1
                             |          __pthread_enable_asynccancel
                             |          (nil)
                             |          
                             |--25.00%-- chmod_common
                             |          sys_fchmodat
                             |          system_call_fastpath
                             |          0x7f7e8be6be87
                             |          __GI___chmod
                             |          
                             |--25.00%-- 0x7f7e8c5989dd
                             |          0x7f7e8c5989dd
                             |          
                              --25.00%-- find_get_page
                                        filemap_fault
                                        __do_fault
                                        handle_pte_fault
                                        do_page_fault
                                        page_fault
                                        0x7fd26a943651
                                        __strlen_sse2
                                        zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                                        (nil)

     0.02%       flush-8:0  [kernel.kallsyms]           [k] release_pages
                 |
                 --- release_pages
                     __pagevec_release
                    |          
                    |--69.23%-- mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--55.56%-- ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          |          
                    |          |          |--60.00%-- wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --40.00%-- wb_check_old_data_flush
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --44.44%-- write_cache_pages_da
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--15.38%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --15.38%-- ext4_num_dirty_pages.isra.35
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--50.00%-- wb_check_old_data_flush
                               |          wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --50.00%-- wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.02%       flush-8:0  [kernel.kallsyms]           [k] dec_zone_page_state
                 |
                 --- dec_zone_page_state
                     clear_page_dirty_for_io
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--53.85%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--71.43%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --28.57%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --46.15%-- ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.02%     packagekitd  ld-2.14.1.so                [.] do_lookup_x
               |
               --- do_lookup_x

     0.02%         kswapd0  [kernel.kallsyms]           [k] page_check_references.isra.50
                   |
                   --- page_check_references.isra.50
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.02%          iozone  [kernel.kallsyms]           [k] page_waitqueue
                    |
                    --- page_waitqueue
                        unlock_page
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.02%          iozone  [kernel.kallsyms]           [k] end_page_writeback
                    |
                    --- end_page_writeback
                        put_io_page
                        ext4_end_bio
                        blk_update_request
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                       |          
                       |--50.00%-- copy_user_generic_unrolled
                       |          iov_iter_copy_from_user_atomic
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--25.00%-- get_page_from_freelist
                       |          __alloc_pages_nodemask
                       |          alloc_pages_current
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--8.33%-- ext4_do_update_inode
                       |          ext4_mark_iloc_dirty
                       |          ext4_mark_inode_dirty
                       |          ext4_dirty_inode
                       |          __mark_inode_dirty
                       |          generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--8.33%-- __mem_cgroup_commit_charge
                       |          __mem_cgroup_commit_charge_lrucare
                       |          mem_cgroup_cache_charge
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --8.33%-- radix_tree_lookup_element
                                  find_get_page
                                  find_lock_page
                                  grab_cache_page_write_begin
                                  ext4_da_write_begin
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.02%          iozone  [kernel.kallsyms]           [k] add_to_page_cache_locked
                    |
                    --- add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.02%            gpg2  libgcrypt.so.11.7.0         [.] 0x53a2b         
                      |
                      --- 0x7f2a32e3898a

                      |
                      --- 0x7f2a32e38a2b

                      |
                      --- 0x7f2a32e3bbd8

                      |
                      --- 0x7f2a32df09d2
                          0x32df09c900000000

                      |
                      --- 0x7f921f9cec88

                      |
                      --- 0x7f42ec83fcf7
                          0x7f42ed7db590

                      |
                      --- 0x7fb4765846a9

                      |
                      --- 0x7f7e8c59bbf0

                      |
                      --- 0x7f7e8c59bbdc

                      |
                      --- 0x7f7e8c5989dd

                      |
                      --- 0x7f7e8c59a663

     0.02%         swapper  [kernel.kallsyms]           [k] cpu_idle
                   |
                   --- cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.02%         swapper  [kernel.kallsyms]           [k] inc_zone_page_state
                   |
                   --- inc_zone_page_state
                       test_clear_page_writeback
                       end_page_writeback
                       put_io_page
                       ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--90.91%-- do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --9.09%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.02%         swapper  [kernel.kallsyms]           [k] invoke_rcu_callbacks_kthread
                   |
                   --- invoke_rcu_callbacks_kthread
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.02%     packagekitd  libc-2.14.1.so              [.] __strcmp_sse2
               |
               --- __strcmp_sse2
                  |          
                   --100.00%-- 0x7fd254009a70

     0.02%         kswapd0  [kernel.kallsyms]           [k] get_scan_count
                   |
                   --- get_scan_count
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.02%         kswapd0  [kernel.kallsyms]           [k] __put_super
                   |
                   --- __put_super
                       put_super
                       prune_super
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.02%          iozone  libc-2.14.1.so              [.] memset
                    |
                    --- memset

     0.02%          iozone  [kernel.kallsyms]           [k] free_hot_cold_page
                    |
                    --- free_hot_cold_page
                        __pagevec_free
                        release_pages
                       |          
                       |--81.82%-- __pagevec_release
                       |          truncate_inode_pages_range
                       |          |          
                       |          |--66.67%-- ext4_evict_inode
                       |          |          evict
                       |          |          do_unlinkat
                       |          |          ia32_sysret
                       |          |          __GI___unlink
                       |          |          
                       |           --33.33%-- truncate_pagecache
                       |                     ext4_setattr
                       |                     notify_change
                       |                     do_truncate
                       |                     do_sys_ftruncate.constprop.13
                       |                     ia32_sysret
                       |                     __GI___ftruncate
                       |          
                        --18.18%-- pagevec_lru_move_fn
                                  __lru_cache_add
                                  putback_lru_page
                                  unmap_and_move
                                  migrate_pages
                                  compact_zone.part.15
                                  compact_zone_order
                                  try_to_compact_pages
                                  __alloc_pages_direct_compact
                                  __alloc_pages_nodemask
                                  alloc_pages_vma
                                  do_huge_pmd_anonymous_page
                                  do_page_fault
                                  page_fault
                                  memset

     0.02%          iozone  [kernel.kallsyms]           [k] __mem_cgroup_commit_charge_lrucare
                    |
                    --- __mem_cgroup_commit_charge_lrucare
                        mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.02%     packagekitd  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
               |
               --- _raw_spin_unlock_irq
                  |          
                  |--40.00%-- finish_task_switch
                  |          thread_return
                  |          io_schedule
                  |          sleep_on_page_killable
                  |          |          
                  |          |--75.00%-- __wait_on_bit
                  |          |          wait_on_page_bit_killable
                  |          |          __lock_page_or_retry
                  |          |          filemap_fault
                  |          |          __do_fault
                  |          |          handle_pte_fault
                  |          |          do_page_fault
                  |          |          page_fault
                  |          |          |          
                  |          |          |--33.33%-- 0x7fd26c6c1722
                  |          |          |          memset
                  |          |          |          _dl_map_object
                  |          |          |          
                  |          |          |--33.33%-- 0x7fd26c6c171e
                  |          |          |          memset
                  |          |          |          _dl_map_object
                  |          |          |          
                  |          |           --33.33%-- 0x7fd26c6c1a33
                  |          |                     memset
                  |          |                     _dl_map_object
                  |          |          
                  |           --25.00%-- __wait_on_bit_lock
                  |                     __lock_page_killable
                  |                     do_generic_file_read.constprop.34
                  |                     generic_file_aio_read
                  |                     do_sync_read
                  |                     vfs_read
                  |                     sys_read
                  |                     system_call_fastpath
                  |                     0x7fd26a9905bd
                  |                     0x7fd26a9905bd
                  |          
                  |--20.00%-- get_request
                  |          get_request_wait
                  |          __make_request
                  |          generic_make_request.part.52
                  |          submit_bio
                  |          mpage_readpages
                  |          read_pages
                  |          __do_page_cache_readahead
                  |          ra_submit
                  |          |          
                  |          |--50.00%-- filemap_fault
                  |          |          __do_fault
                  |          |          handle_pte_fault
                  |          |          do_page_fault
                  |          |          page_fault
                  |          |          0x7fd26c6b2fbb
                  |          |          check_match.10801
                  |          |          
                  |           --50.00%-- do_generic_file_read.constprop.34
                  |                     generic_file_aio_read
                  |                     do_sync_read
                  |                     vfs_read
                  |                     sys_read
                  |                     system_call_fastpath
                  |                     0x7fd26ac62dcd
                  |                     __libc_read
                  |                     0x7fd254006001
                  |          
                  |--20.00%-- scsi_request_fn
                  |          |          
                  |          |--50.00%-- __make_request
                  |          |          generic_make_request.part.52
                  |          |          submit_bio
                  |          |          submit_bh
                  |          |          ll_rw_block
                  |          |          __breadahead
                  |          |          __ext4_get_inode_loc
                  |          |          ext4_iget
                  |          |          ext4_lookup.part.28
                  |          |          d_alloc_and_lookup
                  |          |          do_lookup
                  |          |          do_last
                  |          |          path_openat
                  |          |          do_filp_open
                  |          |          do_sys_open
                  |          |          system_call_fastpath
                  |          |          0x7fd26c6c0647
                  |          |          open64
                  |          |          
                  |           --50.00%-- blk_run_queue
                  |                     scsi_run_queue
                  |                     scsi_next_command
                  |                     scsi_io_completion
                  |                     blk_done_softirq
                  |                     __do_softirq
                  |                     call_softirq
                  |                     do_softirq
                  |                     irq_exit
                  |                     smp_apic_timer_interrupt
                  |                     apic_timer_interrupt
                  |                     copy_page
                  |                     migrate_page_copy
                  |                     migrate_page
                  |                     move_to_new_page
                  |                     unmap_and_move
                  |                     migrate_pages
                  |                     compact_zone.part.15
                  |                     compact_zone_order
                  |                     try_to_compact_pages
                  |                     __alloc_pages_direct_compact
                  |                     __alloc_pages_nodemask
                  |                     alloc_pages_vma
                  |                     do_huge_pmd_anonymous_page
                  |                     do_page_fault
                  |                     page_fault
                  |                     0x7fd2666fda41
                  |                     __mutex_open_rpmdb
                  |          
                  |--10.00%-- add_to_page_cache_locked.part.29
                  |          add_to_page_cache_lru
                  |          grab_cache_page_write_begin
                  |          ext4_da_write_begin
                  |          generic_perform_write
                  |          generic_file_buffered_write
                  |          __generic_file_aio_write
                  |          generic_file_aio_write
                  |          ext4_file_write
                  |          do_sync_write
                  |          vfs_write
                  |          sys_write
                  |          system_call_fastpath
                  |          0x7fd26ac62d6d
                  |          __libc_write
                  |          
                   --10.00%-- wait_task_zombie
                             do_wait
                             sys_wait4
                             system_call_fastpath
                             0x7fd26ac638bd
                             __libc_waitpid

     0.02%     kworker/0:3  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
               |
               --- _raw_spin_unlock_irqrestore
                  |          
                  |--90.00%-- ata_scsi_queuecmd
                  |          scsi_dispatch_cmd
                  |          scsi_request_fn
                  |          |          
                  |          |--88.89%-- cfq_kick_queue
                  |          |          process_one_work
                  |          |          worker_thread
                  |          |          kthread
                  |          |          kernel_thread_helper
                  |          |          
                  |           --11.11%-- scsi_run_queue
                  |                     scsi_next_command
                  |                     scsi_io_completion
                  |                     blk_done_softirq
                  |                     __do_softirq
                  |                     call_softirq
                  |                     do_softirq
                  |                     irq_exit
                  |                     do_IRQ
                  |                     ret_from_intr
                  |                     _raw_spin_unlock_irqrestore
                  |                     ata_sff_hsm_move
                  |                     ata_sff_pio_task
                  |                     process_one_work
                  |                     worker_thread
                  |                     kthread
                  |                     kernel_thread_helper
                  |          
                   --10.00%-- ata_sff_hsm_move
                             ata_sff_pio_task
                             process_one_work
                             worker_thread
                             kthread
                             kernel_thread_helper

     0.02%         kswapd0  [kernel.kallsyms]           [k] free_pages_prepare
                   |
                   --- free_pages_prepare
                       free_hot_cold_page
                       __pagevec_free
                       free_page_list
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.02%          iozone  libc-2.14.1.so              [.] rand
                    |
                    --- rand
                        __libc_start_main

     0.02%          iozone  [kernel.kallsyms]           [k] __lru_cache_add
                    |
                    --- __lru_cache_add
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.02%          iozone  [kernel.kallsyms]           [k] __find_get_block_slow.isra.19
                    |
                    --- __find_get_block_slow.isra.19
                       |          
                       |--70.00%-- unmap_underlying_metadata
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --30.00%-- __find_get_block
                                  ext4_free_blocks
                                  ext4_clear_blocks
                                  ext4_free_data
                                  ext4_free_branches.part.14
                                  ext4_free_branches.part.14
                                  ext4_ind_truncate
                                  ext4_truncate.part.38
                                  ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.02%          iozone  [kernel.kallsyms]           [k] __ext4_journal_stop
                    |
                    --- __ext4_journal_stop
                       |          
                       |--70.00%-- __mark_inode_dirty
                       |          generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --30.00%-- ext4_da_write_end
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.02%       flush-8:0  [kernel.kallsyms]           [k] __do_softirq
                 |
                 --- __do_softirq
                     call_softirq
                     do_softirq
                     irq_exit
                     do_IRQ
                     ret_from_intr
                    |          
                    |--20.00%-- _raw_spin_unlock_irqrestore
                    |          test_set_page_writeback
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--50.00%-- write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_check_old_data_flush
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --50.00%-- ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--20.00%-- find_get_pages_tag
                    |          pagevec_lookup_tag
                    |          |          
                    |          |--50.00%-- write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --50.00%-- ext4_num_dirty_pages.isra.35
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                    |--10.00%-- __lookup_tag
                    |          radix_tree_gang_lookup_tag_slot
                    |          find_get_pages_tag
                    |          pagevec_lookup_tag
                    |          ext4_num_dirty_pages.isra.35
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                    |--10.00%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                    |--10.00%-- kmem_cache_alloc
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                    |--10.00%-- blk_throtl_bio
                    |          generic_make_request.part.52
                    |          submit_bio
                    |          ext4_io_submit
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_check_old_data_flush
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                    |--10.00%-- ext4_num_dirty_pages.isra.35
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_check_old_data_flush
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --10.00%-- mpage_da_submit_io
                               mpage_da_map_and_submit
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%           rcuc0  [kernel.kallsyms]           [k] rcu_do_batch.isra.20
                     |
                     --- rcu_do_batch.isra.20
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.01%     packagekitd  [kernel.kallsyms]           [k] clear_page
               |
               --- clear_page
                  |          
                  |--88.89%-- prep_new_page
                  |          get_page_from_freelist
                  |          __alloc_pages_nodemask
                  |          alloc_pages_vma
                  |          do_anonymous_page.isra.39
                  |          do_page_fault
                  |          page_fault
                  |          |          
                  |          |--50.00%-- 0x7fd2666fda41
                  |          |          __mutex_open_rpmdb
                  |          |          
                  |          |--25.00%-- 0x7fd26a93baaf
                  |          |          _int_malloc
                  |          |          
                  |          |--12.50%-- file_read_actor
                  |          |          do_generic_file_read.constprop.34
                  |          |          generic_file_aio_read
                  |          |          do_sync_read
                  |          |          vfs_read
                  |          |          sys_read
                  |          |          system_call_fastpath
                  |          |          0x7fd26a9905bd
                  |          |          0x7fd26a9905bd
                  |          |          
                  |           --12.50%-- 0x7fd266767104
                  |                     __memp_init_rpmdb
                  |          
                   --11.11%-- clear_huge_page
                             __do_huge_pmd_anonymous_page
                             do_page_fault
                             page_fault
                             0x7fd2666fda41
                             __mutex_open_rpmdb

     0.01%     packagekitd  [kernel.kallsyms]           [k] do_page_fault
               |
               --- do_page_fault
                   page_fault
                  |          
                  |--22.22%-- 0x7fd2666fda41
                  |          __mutex_open_rpmdb
                  |          
                  |--11.11%-- 0x7fd26ac5a880
                  |          __pthread_initialize_minimal
                  |          (nil)
                  |          0x6567616b6361702f
                  |          
                  |--11.11%-- 0x7fd26b7f0738
                  |          strlen at plt
                  |          
                  |--11.11%-- 0x7fd26a942028
                  |          __strcmp_sse2
                  |          
                  |--11.11%-- 0x7fd26896effc
                  |          OpenSSL_add_all_digests
                  |          (nil)
                  |          
                  |--11.11%-- 0x7fd26a94bb81
                  |          __memcpy_sse2
                  |          
                  |--11.11%-- 0x7fd266e8b589
                  |          std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&)
                  |          0x4
                  |          
                   --11.11%-- 0x7fd2666fa490
                             __lock_env_refresh_rpmdb

     0.01%         kswapd0  [kernel.kallsyms]           [k] down_read_trylock
                   |
                   --- down_read_trylock
                       grab_super_passive
                       prune_super
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] put_super
                   |
                   --- put_super
                       prune_super
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%          iozone  [kernel.kallsyms]           [k] global_dirty_limits
                    |
                    --- global_dirty_limits
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] mem_cgroup_cache_charge
                    |
                    --- mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] __brelse
                    |
                    --- __brelse
                       |          
                       |--88.89%-- ext4_ind_map_blocks
                       |          ext4_map_blocks
                       |          ext4_da_get_block_prep
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --11.11%-- ext4_do_update_inode
                                  ext4_mark_iloc_dirty
                                  ext4_mark_inode_dirty
                                  ext4_dirty_inode
                                  __mark_inode_dirty
                                  ext4_free_blocks
                                  ext4_clear_blocks
                                  ext4_free_data
                                  ext4_free_branches.part.14
                                  ext4_free_branches.part.14
                                  ext4_ind_truncate
                                  ext4_truncate.part.38
                                  ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.01%          iozone  [kernel.kallsyms]           [k] block_write_end
                    |
                    --- block_write_end
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] __percpu_counter_add
                    |
                    --- __percpu_counter_add
                        ext4_claim_free_blocks
                        ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] _raw_spin_unlock
                    |
                    --- _raw_spin_unlock
                       |          
                       |--88.89%-- ext4_da_reserve_space
                       |          ext4_da_get_block_prep
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --11.11%-- __block_write_begin
                                  ext4_da_write_begin
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.01%       flush-8:0  [kernel.kallsyms]           [k] mpage_add_bh_to_extent
                 |
                 --- mpage_add_bh_to_extent
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                    |          
                    |--55.56%-- wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --44.44%-- wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%       flush-8:0  [kernel.kallsyms]           [k] __lookup
                 |
                 --- __lookup
                     radix_tree_gang_lookup_slot
                     find_get_pages
                     pagevec_lookup
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--55.56%-- ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--80.00%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --20.00%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --44.44%-- write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--75.00%-- wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --25.00%-- wb_check_old_data_flush
                                          wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.01%     dbus-daemon  dbus-daemon                 [.] 0x311e2         
               |
               --- 0x4311e2

               |
               --- 0x4309e3

               |
               --- 0x418093

               |
               --- 0x430aac

               |
               --- 0x42019e
                   0x68f0700000

               |
               --- 0x41486d

               |
               --- 0x443251

               |
               --- 0x420413

               |
               --- 0x439ffc

     0.01%         swapper  [kernel.kallsyms]           [k] rcu_process_gp_end.isra.27
                   |
                   --- rcu_process_gp_end.isra.27
                       __rcu_process_callbacks
                      |          
                      |--62.50%-- rcu_process_callbacks
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          smp_apic_timer_interrupt
                      |          apic_timer_interrupt
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --37.50%-- __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.01%         swapper  [kernel.kallsyms]           [k] _raw_spin_lock_irqsave
                   |
                   --- _raw_spin_lock_irqsave
                      |          
                      |--50.00%-- 0x282
                      |          
                      |--25.00%-- try_to_wake_up
                      |          call_timer_fn
                      |          run_timer_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          smp_apic_timer_interrupt
                      |          apic_timer_interrupt
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                      |--12.50%-- test_clear_page_writeback
                      |          end_page_writeback
                      |          put_io_page
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --12.50%-- 0x286

     0.01%         kswapd0  [kernel.kallsyms]           [k] put_page
                   |
                   --- put_page
                       drop_buffers
                       try_to_free_buffers
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] shrink_list
                   |
                   --- shrink_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%          iozone  [kernel.kallsyms]           [k] find_get_pages
                    |
                    --- find_get_pages
                        pagevec_lookup
                       |          
                       |--87.50%-- truncate_inode_pages_range
                       |          |          
                       |          |--57.14%-- ext4_evict_inode
                       |          |          evict
                       |          |          do_unlinkat
                       |          |          ia32_sysret
                       |          |          __GI___unlink
                       |          |          
                       |           --42.86%-- truncate_pagecache
                       |                     ext4_setattr
                       |                     notify_change
                       |                     do_truncate
                       |                     do_sys_ftruncate.constprop.13
                       |                     ia32_sysret
                       |                     __GI___ftruncate
                       |          
                        --12.50%-- mpage_da_submit_io
                                  mpage_da_map_and_submit
                                  ext4_da_writepages
                                  __filemap_fdatawrite_range
                                  filemap_write_and_wait_range
                                  ext4_sync_file
                                  do_fsync
                                  sys_fsync
                                  ia32_sysret
                                  __fsync_nocancel
                                  0x8057120
                                  0x805771a
                                  0x80928e6
                                  __libc_start_main

     0.01%          iozone  [kernel.kallsyms]           [k] balance_dirty_pages_ratelimited_nr.part.16
                    |
                    --- balance_dirty_pages_ratelimited_nr.part.16
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] generic_write_end
                    |
                    --- generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_da_write_begin
                    |
                    --- ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%       flush-8:0  [kernel.kallsyms]           [k] __blk_recalc_rq_segments
                 |
                 --- __blk_recalc_rq_segments
                     blk_recount_segments
                     bio_phys_segments
                     blk_rq_bio_prep
                     __make_request
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                    |          
                    |--62.50%-- io_submit_add_bh
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--80.00%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --20.00%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --37.50%-- mpage_da_submit_io
                               mpage_da_map_and_submit
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--66.67%-- wb_check_old_data_flush
                               |          wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --33.33%-- wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.01%     packagekitd  libc-2.14.1.so              [.] _int_malloc
               |
               --- _int_malloc

     0.01%         kswapd0  [kernel.kallsyms]           [k] __remove_mapping
                   |
                   --- __remove_mapping
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%          iozone  [kernel.kallsyms]           [k] delayacct_end
                    |
                    --- delayacct_end
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] __page_cache_alloc
                    |
                    --- __page_cache_alloc
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] find_lock_page
                    |
                    --- find_lock_page
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] zone_watermark_ok
                    |
                    --- zone_watermark_ok
                        get_page_from_freelist
                        __alloc_pages_nodemask
                        alloc_pages_current
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] next_zones_zonelist
                    |
                    --- next_zones_zonelist
                       |          
                       |--57.14%-- __alloc_pages_nodemask
                       |          alloc_pages_current
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --42.86%-- get_page_from_freelist
                                  __alloc_pages_nodemask
                                  alloc_pages_current
                                  grab_cache_page_write_begin
                                  ext4_da_write_begin
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] mem_cgroup_charge_statistics.isra.28
                    |
                    --- mem_cgroup_charge_statistics.isra.28
                        __mem_cgroup_commit_charge
                        __mem_cgroup_commit_charge_lrucare
                        mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_inode_blocks_set.isra.17
                    |
                    --- ext4_inode_blocks_set.isra.17
                        ext4_do_update_inode
                        ext4_mark_iloc_dirty
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_mark_iloc_dirty
                    |
                    --- ext4_mark_iloc_dirty
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_mark_inode_dirty
                    |
                    --- ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] io_schedule_timeout
                    |
                    --- io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%       flush-8:0  [kernel.kallsyms]           [k] radix_tree_lookup_element
                 |
                 --- radix_tree_lookup_element
                     find_get_page
                     __find_get_block_slow.isra.19
                    |          
                    |--85.71%-- unmap_underlying_metadata
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--50.00%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --50.00%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --14.29%-- __find_get_block
                               __getblk
                               ext4_alloc_branch
                               ext4_ind_map_blocks
                               ext4_map_blocks
                               mpage_da_map_and_submit
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%         swapper  [kernel.kallsyms]           [k] try_to_wake_up
                   |
                   --- try_to_wake_up
                       call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.01%           rcuc0  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                     |
                     --- _raw_spin_unlock_irqrestore
                         __rcu_process_callbacks
                         __do_softirq
                         call_softirq
                         do_softirq
                         local_bh_enable
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.01%            nscd  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                      |
                      --- _raw_spin_unlock_irqrestore
                          ata_scsi_queuecmd
                          scsi_dispatch_cmd
                          scsi_request_fn
                          blk_flush_plug_list
                         |          
                         |--83.33%-- blk_finish_plug
                         |          read_pages
                         |          __do_page_cache_readahead
                         |          ra_submit
                         |          filemap_fault
                         |          __do_fault
                         |          handle_pte_fault
                         |          do_page_fault
                         |          page_fault
                         |          |          
                         |          |--20.00%-- 0x7ff07504aa33
                         |          |          memset
                         |          |          _dl_map_object
                         |          |          
                         |          |--20.00%-- __clear_user
                         |          |          padzero
                         |          |          load_elf_binary
                         |          |          search_binary_handler
                         |          |          do_execve_common.isra.27
                         |          |          sys_execve
                         |          |          stub_execve
                         |          |          0x7f916e4ef0f7
                         |          |          0x7f916e4ef0f7
                         |          |          
                         |          |--20.00%-- 0x7fc36a8bfa55
                         |          |          _dl_load_cache_lookup
                         |          |          
                         |          |--20.00%-- 0x7fc36a8cea33
                         |          |          memset
                         |          |          _dl_map_object
                         |          |          
                         |           --20.00%-- 0x7fc36a5985de
                         |                     _IO_file_underflow_mmap
                         |          
                          --16.67%-- io_schedule
                                    sleep_on_buffer
                                    __wait_on_bit
                                    out_of_line_wait_on_bit
                                    bh_submit_read
                                    ext4_get_branch
                                    ext4_ind_map_blocks
                                    ext4_map_blocks
                                    _ext4_get_block
                                    do_mpage_readpage
                                    mpage_readpages
                                    read_pages
                                    __do_page_cache_readahead
                                    ra_submit
                                    filemap_fault
                                    __do_fault
                                    handle_pte_fault
                                    do_page_fault
                                    page_fault
                                    0x7f79c0f5a996
                                    memset
                                    _dl_map_object

     0.01%     kworker/0:3  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
               |
               --- _raw_spin_unlock_irq
                  |          
                  |--50.00%-- finish_task_switch
                  |          thread_return
                  |          worker_thread
                  |          kthread
                  |          kernel_thread_helper
                  |          
                  |--33.33%-- scsi_request_fn
                  |          |          
                  |          |--50.00%-- blk_delay_work
                  |          |          process_one_work
                  |          |          worker_thread
                  |          |          kthread
                  |          |          kernel_thread_helper
                  |          |          
                  |           --50.00%-- cfq_kick_queue
                  |                     process_one_work
                  |                     worker_thread
                  |                     kthread
                  |                     kernel_thread_helper
                  |          
                   --16.67%-- worker_thread
                             kthread
                             kernel_thread_helper

     0.01%     kworker/0:1  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
               |
               --- _raw_spin_unlock_irqrestore
                   ata_scsi_queuecmd
                   scsi_dispatch_cmd
                   scsi_request_fn
                  |          
                  |--50.00%-- scsi_run_queue
                  |          scsi_next_command
                  |          scsi_io_completion
                  |          blk_done_softirq
                  |          __do_softirq
                  |          call_softirq
                  |          do_softirq
                  |          irq_exit
                  |          |          
                  |          |--66.67%-- do_IRQ
                  |          |          ret_from_intr
                  |          |          _raw_spin_unlock_irqrestore
                  |          |          ata_sff_hsm_move
                  |          |          ata_sff_pio_task
                  |          |          process_one_work
                  |          |          worker_thread
                  |          |          kthread
                  |          |          kernel_thread_helper
                  |          |          
                  |           --33.33%-- smp_apic_timer_interrupt
                  |                     apic_timer_interrupt
                  |                     _raw_spin_unlock_irqrestore
                  |                     ata_sff_hsm_move
                  |                     ata_sff_pio_task
                  |                     process_one_work
                  |                     worker_thread
                  |                     kthread
                  |                     kernel_thread_helper
                  |          
                  |--33.33%-- cfq_kick_queue
                  |          process_one_work
                  |          worker_thread
                  |          kthread
                  |          kernel_thread_helper
                  |          
                   --16.67%-- blk_execute_rq_nowait
                             blk_execute_rq
                             scsi_execute
                             scsi_execute_req
                             sr_get_events
                             sr_check_events
                             cdrom_check_events
                             disk_events_workfn
                             process_one_work
                             worker_thread
                             kthread
                             kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] free_page_list
                   |
                   --- free_page_list
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] shrink_inactive_list
                   |
                   --- shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] mem_cgroup_soft_limit_reclaim
                   |
                   --- mem_cgroup_soft_limit_reclaim
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] drop_super
                   |
                   --- drop_super
                       prune_super
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%          iozone  [kernel.kallsyms]           [k] add_to_page_cache_locked.part.29
                    |
                    --- add_to_page_cache_locked.part.29
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] find_get_page
                    |
                    --- find_get_page
                       |          
                       |--50.00%-- find_lock_page
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --50.00%-- __find_get_block_slow.isra.19
                                  |          
                                  |--66.67%-- unmap_underlying_metadata
                                  |          __block_write_begin
                                  |          ext4_da_write_begin
                                  |          generic_perform_write
                                  |          generic_file_buffered_write
                                  |          __generic_file_aio_write
                                  |          generic_file_aio_write
                                  |          ext4_file_write
                                  |          do_sync_write
                                  |          vfs_write
                                  |          sys_write
                                  |          ia32_sysret
                                  |          0xf77904be
                                  |          __write_nocancel
                                  |          
                                   --33.33%-- __find_get_block
                                             ext4_free_blocks
                                             ext4_clear_blocks
                                             ext4_free_data
                                             ext4_free_branches.part.14
                                             ext4_free_branches.part.14
                                             ext4_ind_truncate
                                             ext4_truncate.part.38
                                             ext4_evict_inode
                                             evict
                                             do_unlinkat
                                             ia32_sysret
                                             __GI___unlink

     0.01%          iozone  [kernel.kallsyms]           [k] bdi_dirty_limit
                    |
                    --- bdi_dirty_limit
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] put_page
                    |
                    --- put_page
                       |          
                       |--50.00%-- put_io_page
                       |          ext4_end_bio
                       |          blk_update_request
                       |          blk_update_bidi_request
                       |          blk_end_bidi_request
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          do_IRQ
                       |          ret_from_intr
                       |          |          
                       |          |--33.33%-- alloc_buffer_head
                       |          |          alloc_page_buffers
                       |          |          create_empty_buffers
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--33.33%-- copy_user_generic_unrolled
                       |          |          iov_iter_copy_from_user_atomic
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --33.33%-- __wake_up_bit
                       |                     generic_write_end
                       |                     ext4_da_write_end
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                       |--16.67%-- drop_buffers
                       |          try_to_free_buffers
                       |          shrink_page_list
                       |          shrink_inactive_list
                       |          shrink_zone
                       |          shrink_zones
                       |          do_try_to_free_pages
                       |          try_to_free_pages
                       |          __alloc_pages_nodemask
                       |          alloc_pages_vma
                       |          do_huge_pmd_anonymous_page
                       |          do_page_fault
                       |          page_fault
                       |          memset
                       |          
                       |--16.67%-- truncate_inode_page
                       |          truncate_inode_pages_range
                       |          truncate_pagecache
                       |          ext4_setattr
                       |          notify_change
                       |          do_truncate
                       |          do_sys_ftruncate.constprop.13
                       |          ia32_sysret
                       |          __GI___ftruncate
                       |          
                        --16.67%-- generic_write_end
                                  ext4_da_write_end
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] policy_nodemask
                    |
                    --- policy_nodemask
                        alloc_pages_current
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] drop_buffers
                    |
                    --- drop_buffers
                        try_to_free_buffers
                       |          
                       |--50.00%-- shrink_page_list
                       |          shrink_inactive_list
                       |          shrink_zone
                       |          shrink_zones
                       |          do_try_to_free_pages
                       |          try_to_free_pages
                       |          __alloc_pages_nodemask
                       |          |          
                       |          |--66.67%-- alloc_pages_vma
                       |          |          do_huge_pmd_anonymous_page
                       |          |          do_page_fault
                       |          |          page_fault
                       |          |          memset
                       |          |          
                       |           --33.33%-- alloc_pages_current
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                        --50.00%-- truncate_inode_page
                                  truncate_inode_pages_range
                                  ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.01%          iozone  [kernel.kallsyms]           [k] __getblk
                    |
                    --- __getblk
                       |          
                       |--83.33%-- ext4_get_branch
                       |          ext4_ind_map_blocks
                       |          ext4_map_blocks
                       |          ext4_da_get_block_prep
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --16.67%-- __ext4_get_inode_loc
                                  ext4_reserve_inode_write
                                  ext4_mark_inode_dirty
                                  ext4_dirty_inode
                                  __mark_inode_dirty
                                  generic_write_end
                                  ext4_da_write_end
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] inode_reserved_space
                    |
                    --- inode_reserved_space
                        inode_add_rsv_space
                        __dquot_alloc_space
                        ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_get_group_desc
                    |
                    --- ext4_get_group_desc
                        __ext4_get_inode_loc
                        ext4_reserve_inode_write
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                       |          
                       |--66.67%-- generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--16.67%-- file_update_time
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --16.67%-- ext4_free_blocks
                                  ext4_free_branches.part.14
                                  ext4_free_branches.part.14
                                  ext4_ind_truncate
                                  ext4_truncate.part.38
                                  ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_claim_free_blocks
                    |
                    --- ext4_claim_free_blocks
                        ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_nonda_switch
                    |
                    --- ext4_nonda_switch
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_da_page_release_reservation
                    |
                    --- ext4_da_page_release_reservation
                        ext4_da_invalidatepage
                        truncate_inode_page
                        truncate_inode_pages_range
                       |          
                       |--66.67%-- ext4_evict_inode
                       |          evict
                       |          do_unlinkat
                       |          ia32_sysret
                       |          __GI___unlink
                       |          
                        --33.33%-- truncate_pagecache
                                  ext4_setattr
                                  notify_change
                                  do_truncate
                                  do_sys_ftruncate.constprop.13
                                  ia32_sysret
                                  __GI___ftruncate

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_free_blocks
                    |
                    --- ext4_free_blocks
                        ext4_clear_blocks
                        ext4_free_data
                        ext4_free_branches.part.14
                        ext4_free_branches.part.14
                        ext4_ind_truncate
                        ext4_truncate.part.38
                        ext4_evict_inode
                        evict
                        do_unlinkat
                        ia32_sysret
                        __GI___unlink

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_data_block_valid
                    |
                    --- ext4_data_block_valid
                        ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%       flush-8:0  [kernel.kallsyms]           [k] test_set_page_writeback
                 |
                 --- test_set_page_writeback
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--50.00%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --50.00%-- ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               |          
                               |--66.67%-- wb_do_writeback
                               |          bdi_writeback_thread
                               |          kthread
                               |          kernel_thread_helper
                               |          
                                --33.33%-- wb_check_old_data_flush
                                          wb_do_writeback
                                          bdi_writeback_thread
                                          kthread
                                          kernel_thread_helper

     0.01%       flush-8:0  [kernel.kallsyms]           [k] inc_zone_page_state
                 |
                 --- inc_zone_page_state
                    |          
                    |--83.33%-- test_set_page_writeback
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--60.00%-- ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --40.00%-- write_cache_pages_da
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     |          
                    |                     |--50.00%-- wb_do_writeback
                    |                     |          bdi_writeback_thread
                    |                     |          kthread
                    |                     |          kernel_thread_helper
                    |                     |          
                    |                      --50.00%-- wb_check_old_data_flush
                    |                                wb_do_writeback
                    |                                bdi_writeback_thread
                    |                                kthread
                    |                                kernel_thread_helper
                    |          
                     --16.67%-- test_clear_page_writeback
                               end_page_writeback
                               put_io_page
                               ext4_end_bio
                               blk_update_request
                               blk_update_bidi_request
                               blk_end_bidi_request
                               scsi_io_completion
                               blk_done_softirq
                               __do_softirq
                               call_softirq
                               do_softirq
                               irq_exit
                               do_IRQ
                               ret_from_intr
                               find_get_pages_tag
                               pagevec_lookup_tag
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%       flush-8:0  [kernel.kallsyms]           [k] memset
                 |
                 --- memset
                     kmem_cache_alloc
                     ext4_init_io_end
                     io_submit_init.isra.4
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--50.00%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--66.67%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --33.33%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --50.00%-- ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%         swapper  [kernel.kallsyms]           [k] check_for_new_grace_period.isra.29
                   |
                   --- check_for_new_grace_period.isra.29
                       rcu_check_quiescent_state
                       __rcu_process_callbacks
                       rcu_process_callbacks
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--80.00%-- smp_apic_timer_interrupt
                      |          apic_timer_interrupt
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --20.00%-- do_IRQ
                                 ret_from_intr
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.01%         swapper  [kernel.kallsyms]           [k] __rcu_process_callbacks
                   |
                   --- __rcu_process_callbacks
                       rcu_process_callbacks
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.01%         swapper  [kernel.kallsyms]           [k] rcu_preempt_note_context_switch
                   |
                   --- rcu_preempt_note_context_switch
                       __schedule
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.01%           rcuc0  [kernel.kallsyms]           [k] local_bh_enable
                     |
                     --- local_bh_enable
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.01%           rcuc0  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                     |
                     --- _raw_spin_unlock_irq
                         finish_task_switch
                         thread_return
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.01%     packagekitd  libc-2.14.1.so              [.] _int_free
               |
               --- _int_free
                  |          
                   --100.00%-- (nil)

     0.01%     packagekitd  [kernel.kallsyms]           [k] copy_pte_range
               |
               --- copy_pte_range
                   copy_page_range
                   dup_mmap
                   dup_mm
                   copy_mm
                   copy_process.part.20
                   do_fork
                   stub_clone
                   0x7fd26a96cdf6
                   __libc_fork
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()
                   0x480028a2e1058b48

     0.01%         kswapd0  [kernel.kallsyms]           [k] up_read
                   |
                   --- up_read
                       drop_super
                       prune_super
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] try_to_release_page
                   |
                   --- try_to_release_page
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] mem_cgroup_charge_statistics.isra.28
                   |
                   --- mem_cgroup_charge_statistics.isra.28
                       __mem_cgroup_uncharge_common
                       __remove_mapping
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] bit_spin_unlock
                   |
                   --- bit_spin_unlock
                       __mem_cgroup_uncharge_common
                       __remove_mapping
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%          iozone  [kernel.kallsyms]           [k] del_timer_sync
                    |
                    --- del_timer_sync
                        schedule_timeout
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] up_read
                    |
                    --- up_read
                        ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] add_to_page_cache_lru
                    |
                    --- add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] policy_zonelist
                    |
                    --- policy_zonelist
                        alloc_pages_current
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] bit_spin_unlock
                    |
                    --- bit_spin_unlock
                       |          
                       |--60.00%-- __mem_cgroup_commit_charge
                       |          __mem_cgroup_commit_charge_lrucare
                       |          mem_cgroup_cache_charge
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --40.00%-- __mem_cgroup_uncharge_common
                                  |          
                                  |--50.00%-- page_remove_rmap
                                  |          try_to_unmap_one
                                  |          try_to_unmap_anon
                                  |          try_to_unmap
                                  |          unmap_and_move
                                  |          migrate_pages
                                  |          compact_zone.part.15
                                  |          compact_zone_order
                                  |          try_to_compact_pages
                                  |          __alloc_pages_direct_compact
                                  |          __alloc_pages_nodemask
                                  |          alloc_pages_vma
                                  |          do_huge_pmd_anonymous_page
                                  |          do_page_fault
                                  |          page_fault
                                  |          memset
                                  |          
                                   --50.00%-- delete_from_page_cache
                                             truncate_inode_page
                                             truncate_inode_pages_range
                                             ext4_evict_inode
                                             evict
                                             do_unlinkat
                                             ia32_sysret
                                             __GI___unlink

     0.01%          iozone  [kernel.kallsyms]           [k] __mem_cgroup_uncharge_common
                    |
                    --- __mem_cgroup_uncharge_common
                       |          
                       |--80.00%-- delete_from_page_cache
                       |          truncate_inode_page
                       |          truncate_inode_pages_range
                       |          truncate_pagecache
                       |          ext4_setattr
                       |          notify_change
                       |          do_truncate
                       |          do_sys_ftruncate.constprop.13
                       |          ia32_sysret
                       |          __GI___ftruncate
                       |          
                        --20.00%-- page_remove_rmap
                                  zap_pte_range
                                  unmap_page_range
                                  unmap_vmas
                                  exit_mmap
                                  mmput.part.18
                                  exit_mm
                                  do_exit
                                  do_group_exit
                                  sys_exit_group
                                  ia32_sysret

     0.01%          iozone  [kernel.kallsyms]           [k] inode_add_rsv_space
                    |
                    --- inode_add_rsv_space
                        __dquot_alloc_space
                        ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_ind_calc_metadata_amount
                    |
                    --- ext4_ind_calc_metadata_amount
                        ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] schedule_timeout
                    |
                    --- schedule_timeout
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%      virtuoso-t  virtuoso-t                  [.] 0x3c1d68        
                |
                --- 0x7c1d68

                |
                --- 0x485e7f

                |
                --- 0x4b8d42

                |
                --- 0x582292

     0.01%         swapper  [kernel.kallsyms]           [k] page_waitqueue
                   |
                   --- page_waitqueue
                       end_page_writeback
                       put_io_page
                       ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--75.00%-- do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --25.00%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.01%         swapper  [kernel.kallsyms]           [k] put_page
                   |
                   --- put_page
                       put_io_page
                       ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--50.00%-- smp_apic_timer_interrupt
                      |          apic_timer_interrupt
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --50.00%-- do_IRQ
                                 ret_from_intr
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.01%         swapper  [kernel.kallsyms]           [k] blk_account_io_completion
                   |
                   --- blk_account_io_completion
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--75.00%-- do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --25.00%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.01%         swapper  [kernel.kallsyms]           [k] sd_done
                   |
                   --- sd_done
                       scsi_finish_command
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--75.00%-- do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --25.00%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.01%           rcuc0  [kernel.kallsyms]           [k] check_for_new_grace_period.isra.29
                     |
                     --- check_for_new_grace_period.isra.29
                         rcu_check_quiescent_state
                         __rcu_process_callbacks
                        |          
                        |--75.00%-- rcu_process_callbacks
                        |          __do_softirq
                        |          call_softirq
                        |          do_softirq
                        |          local_bh_enable
                        |          rcu_cpu_kthread
                        |          kthread
                        |          kernel_thread_helper
                        |          
                         --25.00%-- __do_softirq
                                   call_softirq
                                   do_softirq
                                   local_bh_enable
                                   rcu_cpu_kthread
                                   kthread
                                   kernel_thread_helper

     0.01%           rcuc0  [kernel.kallsyms]           [k] radix_tree_node_rcu_free
                     |
                     --- radix_tree_node_rcu_free
                         rcu_do_batch.isra.20
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.01%     packagekitd  libxml2.so.2.7.8            [.] 0xfbf62         
               |
               --- 0x7fd268d3df62

               |
               --- 0x7fd268c828b3

               |
               --- 0x7fd268d3df6a

               |
               --- 0x7fd268c82684

     0.01%     packagekitd  librpmio.so.2.0.1           [.] 0x10c0d         
               |
               --- 0x7fd265d20c0d

               |
               --- 0x7fd265d20c09

     0.01%     packagekitd  libc-2.14.1.so              [.] msort_with_tmp.part.0
               |
               --- msort_with_tmp.part.0
                  |          
                   --100.00%-- 0x7fd265d20c56

     0.01%     kworker/0:0  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
               |
               --- _raw_spin_unlock_irq
                  |          
                  |--75.00%-- scsi_request_fn
                  |          |          
                  |          |--66.67%-- cfq_kick_queue
                  |          |          process_one_work
                  |          |          worker_thread
                  |          |          kthread
                  |          |          kernel_thread_helper
                  |          |          
                  |           --33.33%-- blk_delay_work
                  |                     process_one_work
                  |                     worker_thread
                  |                     kthread
                  |                     kernel_thread_helper
                  |          
                   --25.00%-- process_one_work
                             worker_thread
                             kthread
                             kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] __wake_up_bit
                   |
                   --- __wake_up_bit
                      |          
                      |--50.00%-- put_io_page
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          _raw_spin_unlock_irq
                      |          |          
                      |          |--50.00%-- __remove_mapping
                      |          |          shrink_page_list
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --50.00%-- shrink_inactive_list
                      |                     shrink_zone
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                      |--25.00%-- shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                       --25.00%-- page_referenced
                                 shrink_active_list.isra.56
                                 shrink_list
                                 shrink_zone
                                 balance_pgdat
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] zone_watermark_ok_safe
                   |
                   --- zone_watermark_ok_safe
                      |          
                      |--75.00%-- balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                       --25.00%-- sleeping_prematurely.part.53
                                 kswapd_try_to_sleep
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] zone_nr_lru_pages.isra.47
                   |
                   --- zone_nr_lru_pages.isra.47
                       get_scan_count
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.01%         kswapd0  [kernel.kallsyms]           [k] _cond_resched
                   |
                   --- _cond_resched
                      |          
                      |--50.00%-- shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--25.00%-- shrink_active_list.isra.56
                      |          shrink_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                       --25.00%-- balance_pgdat
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.01%          iozone  [kernel.kallsyms]           [k] determine_dirtyable_memory
                    |
                    --- determine_dirtyable_memory
                        global_dirty_limits
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] release_pages
                    |
                    --- release_pages
                        pagevec_lru_move_fn
                        __lru_cache_add
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] global_reclaimable_pages
                    |
                    --- global_reclaimable_pages
                        determine_dirtyable_memory
                        global_dirty_limits
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] mem_cgroup_lru_add_after_commit
                    |
                    --- mem_cgroup_lru_add_after_commit
                        mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] recalc_bh_state
                    |
                    --- recalc_bh_state
                       |          
                       |--75.00%-- alloc_buffer_head
                       |          alloc_page_buffers
                       |          create_empty_buffers
                       |          __block_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --25.00%-- free_buffer_head
                                  try_to_free_buffers
                                  truncate_inode_page
                                  truncate_inode_pages_range
                                  ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.01%          iozone  [kernel.kallsyms]           [k] bh_uptodate_or_lock
                    |
                    --- bh_uptodate_or_lock
                        ext4_get_branch
                        ext4_ind_map_blocks
                        ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_get_inode_flags
                    |
                    --- ext4_get_inode_flags
                        ext4_do_update_inode
                        ext4_mark_iloc_dirty
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                       |          
                       |--75.00%-- generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --25.00%-- file_update_time
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] ext4_inode_table
                    |
                    --- ext4_inode_table
                        __ext4_get_inode_loc
                        ext4_reserve_inode_write
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] mb_find_buddy
                    |
                    --- mb_find_buddy
                        mb_free_blocks
                        ext4_free_blocks
                        ext4_clear_blocks
                        ext4_free_data
                        ext4_free_branches.part.14
                        ext4_free_branches.part.14
                        ext4_ind_truncate
                        ext4_truncate.part.38
                       |          
                       |--50.00%-- ext4_setattr
                       |          notify_change
                       |          do_truncate
                       |          do_sys_ftruncate.constprop.13
                       |          ia32_sysret
                       |          __GI___ftruncate
                       |          
                        --50.00%-- ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.01%          iozone  [kernel.kallsyms]           [k] blk_flush_plug_list
                    |
                    --- blk_flush_plug_list
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.01%          iozone  [kernel.kallsyms]           [k] _raw_spin_lock_irqsave
                    |
                    --- _raw_spin_lock_irqsave
                       |          
                       |--25.00%-- 0x282
                       |          __write_nocancel
                       |          
                       |--25.00%-- lock_timer_base.isra.30
                       |          try_to_del_timer_sync
                       |          del_timer_sync
                       |          schedule_timeout
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--25.00%-- test_clear_page_writeback
                       |          end_page_writeback
                       |          put_io_page
                       |          ext4_end_bio
                       |          blk_update_request
                       |          blk_update_bidi_request
                       |          blk_end_bidi_request
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          do_IRQ
                       |          ret_from_intr
                       |          copy_user_generic_unrolled
                       |          iov_iter_copy_from_user_atomic
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --25.00%-- pagevec_lru_move_fn
                                  __lru_cache_add
                                  add_to_page_cache_lru
                                  grab_cache_page_write_begin
                                  ext4_da_write_begin
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.01%            gpg2  ld-2.14.1.so                [.] _dl_lookup_symbol_x
               |
               --- _dl_lookup_symbol_x
                  |          
                  |--75.00%-- _dl_relocate_object
                  |          dl_main
                  |          _dl_sysdep_start
                  |          
                   --25.00%-- _dl_fixup

     0.01%            gpg2  [kernel.kallsyms]           [k] clear_page
               |
               --- clear_page
                   prep_new_page
                   get_page_from_freelist
                   __alloc_pages_nodemask
                  |          
                  |--50.00%-- alloc_pages_current
                  |          |          
                  |          |--50.00%-- __get_free_pages
                  |          |          __pud_alloc
                  |          |          handle_mm_fault
                  |          |          __get_user_pages
                  |          |          get_arg_page
                  |          |          copy_strings.isra.24
                  |          |          copy_strings_kernel
                  |          |          do_execve_common.isra.27
                  |          |          sys_execve
                  |          |          stub_execve
                  |          |          0x7fd26a96d0f7
                  |          |          __execve
                  |          |          zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                  |          |          (nil)
                  |          |          
                  |           --50.00%-- pte_alloc_one
                  |                     __pte_alloc
                  |                     handle_mm_fault
                  |                     do_page_fault
                  |                     page_fault
                  |                     0x7f574ae93640
                  |                     _start
                  |          
                   --50.00%-- alloc_pages_vma
                             do_anonymous_page.isra.39
                             do_page_fault
                             page_fault
                             |          
                             |--50.00%-- 0x7f842274a3cf
                             |          allocate_dtv
                             |          
                              --50.00%-- 0x7f28f143ca66
                                        _dl_init_paths
                                        dl_main
                                        _dl_sysdep_start

     0.01%             gpg  [kernel.kallsyms]           [k] system_call_after_swapgs
               |
               --- system_call_after_swapgs
                   0x7fd26ac62e2d
                   __libc_close

     0.01%       flush-8:0  [kernel.kallsyms]           [k] get_page_from_freelist
                 |
                 --- get_page_from_freelist
                     __alloc_pages_nodemask
                     kmem_getpages
                    |          
                    |--75.00%-- cache_grow
                    |          cache_alloc_refill
                    |          kmem_cache_alloc
                    |          |          
                    |          |--66.67%-- ext4_bio_write_page
                    |          |          mpage_da_submit_io
                    |          |          mpage_da_map_and_submit
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --33.33%-- ext4_init_io_end
                    |                     io_submit_init.isra.4
                    |                     io_submit_add_bh
                    |                     ext4_bio_write_page
                    |                     mpage_da_submit_io
                    |                     mpage_da_map_and_submit
                    |                     write_cache_pages_da
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --25.00%-- fallback_alloc
                               kmem_cache_alloc
                               ext4_bio_write_page
                               mpage_da_submit_io
                               mpage_da_map_and_submit
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%       flush-8:0  [kernel.kallsyms]           [k] lookup_bh_lru
                 |
                 --- lookup_bh_lru
                     __find_get_block
                     __getblk
                    |          
                    |--75.00%-- ext4_get_branch
                    |          ext4_ind_map_blocks
                    |          ext4_map_blocks
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          |          
                    |          |--66.67%-- wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --33.33%-- wb_check_old_data_flush
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --25.00%-- ext4_read_block_bitmap
                               ext4_mb_mark_diskspace_used
                               ext4_mb_new_blocks
                               ext4_new_meta_blocks
                               ext4_alloc_blocks
                               ext4_alloc_branch
                               ext4_ind_map_blocks
                               ext4_map_blocks
                               mpage_da_map_and_submit
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%       flush-8:0  [kernel.kallsyms]           [k] ext4_da_writepages
                 |
                 --- ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                    |          
                    |--75.00%-- wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --25.00%-- wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%       flush-8:0  [kernel.kallsyms]           [k] blk_rq_init
                 |
                 --- blk_rq_init
                     get_request
                     get_request_wait
                     __make_request
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                    |          
                    |--75.00%-- mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--66.67%-- write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          |          
                    |          |          |--50.00%-- wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --50.00%-- wb_check_old_data_flush
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --33.33%-- ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --25.00%-- io_submit_add_bh
                               ext4_bio_write_page
                               mpage_da_submit_io
                               mpage_da_map_and_submit
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.01%     dbus-daemon  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
               |
               --- _raw_spin_unlock_irqrestore
                  |          
                  |--75.00%-- sock_def_readable
                  |          unix_stream_sendmsg
                  |          sock_sendmsg
                  |          __sys_sendmsg
                  |          sys_sendmsg
                  |          system_call_fastpath
                  |          0x7f249a574320
                  |          __libc_sendmsg
                  |          
                   --25.00%-- ata_scsi_queuecmd
                             scsi_dispatch_cmd
                             scsi_request_fn
                             __make_request
                             generic_make_request.part.52
                             submit_bio
                             submit_bh
                             ll_rw_block
                             __breadahead
                             __ext4_get_inode_loc
                             ext4_iget
                             ext4_lookup.part.28
                             d_alloc_and_lookup
                             do_lookup
                             path_lookupat
                             do_path_lookup
                             user_path_at
                             vfs_fstatat
                             sys_newstat
                             system_call_fastpath
                             0x7f249a098835
                             __xstat64

     0.00%         swapper  [kernel.kallsyms]           [k] delayed_work_timer_fn
                   |
                   --- delayed_work_timer_fn
                       call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] add_disk_randomness
                   |
                   --- add_disk_randomness
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--66.67%-- do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --33.33%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_finish_command
                   |
                   --- scsi_finish_command
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_io_completion
                   |
                   --- scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--66.67%-- do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --33.33%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.00%            sshd  [8139cp]                    [k] cp_start_xmit
                      |
                      --- cp_start_xmit
                          dev_hard_start_xmit
                          sch_direct_xmit
                          dev_queue_xmit
                          ip_finish_output
                          ip_queue_xmit
                          tcp_transmit_skb
                          tcp_write_xmit
                          __tcp_push_pending_frames
                          tcp_sendmsg
                          do_sock_write.isra.12
                          sock_aio_write
                          do_sync_write
                          vfs_write
                          sys_write
                          system_call_fastpath
                          0x7f90cba2c600
                          __write_nocancel
                          0xcdb1642000986684

     0.00%           rcuc0  [kernel.kallsyms]           [k] rcu_cpu_kthread
                     |
                     --- rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%     packagekitd  librpm.so.2.0.2             [.] __mut_failchk_rpmdb
               |
               --- __mut_failchk_rpmdb

     0.00%     packagekitd  libdbus-1.so.3.6.4          [.] 0x2973c         
               |
               --- 0x7fd26c01273c
                   0x6eaec800000000

               |
               --- 0x7fd26bfff4f0
                   0x7fd26c22c910

               |
               --- 0x7fd26bffd66b

     0.00%     packagekitd  libc-2.14.1.so              [.] __gconv_transform_utf8_internal
               |
               --- __gconv_transform_utf8_internal
                  |          
                  |--33.33%-- 0xd263035b10000000
                  |          
                  |--33.33%-- 0xd263036020000000
                  |          
                   --33.33%-- 0xd263036470000000

     0.00%     packagekitd  libc-2.14.1.so              [.] __strlen_sse2
               |
               --- __strlen_sse2
                  |          
                  |--50.00%-- 0x7fd2630360f8
                  |          
                   --50.00%-- 0x3f5b005d4d5b005d

     0.00%     packagekitd  libc-2.14.1.so              [.] __memcpy_sse2
               |
               --- __memcpy_sse2
                  |          
                   --100.00%-- read_alias_file
                             _nl_expand_alias
                             setlocale
                             pk_backend_transaction_start
                             0xec81483a8d48ffff

     0.00%     packagekitd  ld-2.14.1.so                [.] check_match.10801
               |
               --- check_match.10801
                  |          
                   --100.00%-- (nil)

     0.00%     packagekitd  ld-2.14.1.so                [.] _dl_lookup_symbol_x
               |
               --- _dl_lookup_symbol_x
                   _dl_relocate_object
                   dl_open_worker

     0.00%     packagekitd  ld-2.14.1.so                [.] _dl_relocate_object
               |
               --- _dl_relocate_object
                  |          
                  |--66.67%-- dl_open_worker
                  |          
                   --33.33%-- dl_main
                             _dl_sysdep_start

     0.00%     packagekitd  [kernel.kallsyms]           [k] dup_mmap
               |
               --- dup_mmap
                   dup_mm
                   copy_mm
                   copy_process.part.20
                   do_fork
                   stub_clone
                   0x7fd26a96cdf6
                   __libc_fork
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()
                   0x480028a2e1058b48

     0.00%     packagekitd  [kernel.kallsyms]           [k] __do_softirq
               |
               --- __do_softirq
                   call_softirq
                   do_softirq
                   irq_exit
                   do_IRQ
                   ret_from_intr
                  |          
                  |--33.33%-- d_instantiate
                  |          d_splice_alias
                  |          ext4_lookup.part.28
                  |          d_alloc_and_lookup
                  |          do_lookup
                  |          do_last
                  |          path_openat
                  |          do_filp_open
                  |          do_sys_open
                  |          system_call_fastpath
                  |          0x7fd26a990220
                  |          __GI___libc_open
                  |          
                  |--33.33%-- 0x7fd2674b4100
                  |          zypp::str::regex::regex(std::string const&, int)
                  |          operator new(unsigned long)
                  |          
                   --33.33%-- 0x7fd26896110c
                             lh_insert
                             0x7fd268c3f260

     0.00%     packagekitd  [kernel.kallsyms]           [k] __wake_up_bit
               |
               --- __wake_up_bit
                  |          
                  |--66.67%-- unmap_and_move
                  |          migrate_pages
                  |          compact_zone.part.15
                  |          compact_zone_order
                  |          try_to_compact_pages
                  |          __alloc_pages_direct_compact
                  |          __alloc_pages_nodemask
                  |          alloc_pages_vma
                  |          do_huge_pmd_anonymous_page
                  |          do_page_fault
                  |          page_fault
                  |          0x7fd2666fda41
                  |          __mutex_open_rpmdb
                  |          
                   --33.33%-- __do_fault
                             handle_pte_fault
                             do_page_fault
                             page_fault
                             0x7fd2663b6810
                             setstropt

     0.00%     packagekitd  [kernel.kallsyms]           [k] kmem_cache_alloc
               |
               --- kmem_cache_alloc
                  |          
                  |--33.33%-- anon_vma_fork
                  |          dup_mmap
                  |          dup_mm
                  |          copy_mm
                  |          copy_process.part.20
                  |          do_fork
                  |          stub_clone
                  |          0x7fd26a96cdf6
                  |          __libc_fork
                  |          zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                  |          0x2
                  |          std::ctype<char>::~ctype()
                  |          0x480028a2e1058b48
                  |          
                  |--33.33%-- anon_vma_clone
                  |          __split_vma
                  |          do_munmap
                  |          sys_munmap
                  |          system_call_fastpath
                  |          0x7fd26a99b2d7
                  |          __GI___munmap
                  |          (nil)
                  |          
                   --33.33%-- dup_mmap
                             dup_mm
                             copy_mm
                             copy_process.part.20
                             do_fork
                             stub_clone
                             0x7fd26a96cdf6
                             __libc_fork
                             zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                             0x2
                             std::ctype<char>::~ctype()
                             0x480028a2e1058b48

     0.00%         kswapd0  [kernel.kallsyms]           [k] __pagevec_free
                   |
                   --- __pagevec_free
                       free_page_list
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] sleeping_prematurely.part.53
                   |
                   --- sleeping_prematurely.part.53
                       kswapd_try_to_sleep
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] page_evictable
                   |
                   --- page_evictable
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] shrink_zone
                   |
                   --- shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] vma_prio_tree_next
                   |
                   --- vma_prio_tree_next
                      |          
                      |--66.67%-- page_referenced_file
                      |          page_referenced
                      |          |          
                      |          |--50.00%-- page_check_references.isra.50
                      |          |          shrink_page_list
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --50.00%-- shrink_active_list.isra.56
                      |                     shrink_list
                      |                     shrink_zone
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                       --33.33%-- try_to_unmap_file
                                 try_to_unmap
                                 shrink_page_list
                                 shrink_inactive_list
                                 shrink_zone
                                 balance_pgdat
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] __d_shrink
                   |
                   --- __d_shrink
                       __d_drop
                       shrink_dentry_list
                       __shrink_dcache_sb
                       prune_super
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] recalc_bh_state
                   |
                   --- recalc_bh_state
                       free_buffer_head
                       try_to_free_buffers
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] invoke_rcu_callbacks_kthread
                   |
                   --- invoke_rcu_callbacks_kthread
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--66.67%-- do_IRQ
                      |          ret_from_intr
                      |          |          
                      |          |--50.00%-- _raw_spin_unlock
                      |          |          grab_super_passive
                      |          |          prune_super
                      |          |          shrink_slab
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --50.00%-- grab_super_passive
                      |                     prune_super
                      |                     shrink_slab
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                       --33.33%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 _raw_spin_unlock_irq
                                 shrink_inactive_list
                                 shrink_zone
                                 balance_pgdat
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] schedule_timeout
                   |
                   --- schedule_timeout
                       kswapd_try_to_sleep
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%          iozone  [kernel.kallsyms]           [k] native_read_tsc
                    |
                    --- native_read_tsc
                        pvclock_clocksource_read
                        kvm_clock_read
                        ktime_get_ts
                       |          
                       |--66.67%-- io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --33.33%-- delayacct_end
                                  io_schedule_timeout
                                  balance_dirty_pages.isra.15
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] try_to_del_timer_sync
                    |
                    --- try_to_del_timer_sync
                        del_timer_sync
                        schedule_timeout
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] bit_waitqueue
                    |
                    --- bit_waitqueue
                        wake_up_bit
                       |          
                       |--66.67%-- block_invalidatepage
                       |          truncate_inode_page
                       |          truncate_inode_pages_range
                       |          truncate_pagecache
                       |          ext4_setattr
                       |          notify_change
                       |          do_truncate
                       |          do_sys_ftruncate.constprop.13
                       |          ia32_sysret
                       |          __GI___ftruncate
                       |          
                        --33.33%-- buffer_migrate_page
                                  move_to_new_page
                                  unmap_and_move
                                  migrate_pages
                                  compact_zone.part.15
                                  compact_zone_order
                                  try_to_compact_pages
                                  __alloc_pages_direct_compact
                                  __alloc_pages_nodemask
                                  alloc_pages_vma
                                  do_huge_pmd_anonymous_page
                                  do_page_fault
                                  page_fault
                                  memset

     0.00%          iozone  [kernel.kallsyms]           [k] __delayacct_blkio_end
                    |
                    --- __delayacct_blkio_end
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] iov_iter_advance
                    |
                    --- iov_iter_advance
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] test_clear_page_writeback
                    |
                    --- test_clear_page_writeback
                        end_page_writeback
                        put_io_page
                        ext4_end_bio
                        blk_update_request
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                       |          
                       |--66.67%-- copy_user_generic_unrolled
                       |          iov_iter_copy_from_user_atomic
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --33.33%-- get_page_from_freelist
                                  __alloc_pages_nodemask
                                  alloc_pages_current
                                  grab_cache_page_write_begin
                                  ext4_da_write_begin
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] truncate_inode_pages_range
                    |
                    --- truncate_inode_pages_range
                       |          
                       |--66.67%-- truncate_pagecache
                       |          ext4_setattr
                       |          notify_change
                       |          do_truncate
                       |          do_sys_ftruncate.constprop.13
                       |          ia32_sysret
                       |          __GI___ftruncate
                       |          
                        --33.33%-- ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.00%          iozone  [kernel.kallsyms]           [k] __set_page_dirty
                    |
                    --- __set_page_dirty
                        __block_commit_write.isra.22
                        block_write_end
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] __dquot_alloc_space
                    |
                    --- __dquot_alloc_space
                        ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] write_cache_pages_da
                    |
                    --- write_cache_pages_da
                        ext4_da_writepages
                        __filemap_fdatawrite_range
                        filemap_write_and_wait_range
                        ext4_sync_file
                        do_fsync
                        sys_fsync
                        ia32_sysret
                        __fsync_nocancel
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

     0.00%          iozone  [kernel.kallsyms]           [k] prop_fraction_percpu
                    |
                    --- prop_fraction_percpu
                        bdi_dirty_limit
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] down_read
                    |
                    --- down_read
                        ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] do_page_fault
                    |
                    --- do_page_fault
                        page_fault
                        memset

     0.00%            gpg2  ld-2.14.1.so                [.] _dl_relocate_object
               |
               --- _dl_relocate_object
                   dl_main
                   _dl_sysdep_start

     0.00%            gpg2  ld-2.14.1.so                [.] strcmp
               |
               --- strcmp
                  |          
                  |--33.33%-- _dl_check_map_versions
                  |          _dl_check_all_versions
                  |          
                  |--33.33%-- 0x7fbe89ef8c18
                  |          
                   --33.33%-- 0x7f28f16324f8

     0.00%            gpg2  [kernel.kallsyms]           [k] zap_pte_range
               |
               --- zap_pte_range
                   unmap_page_range
                   unmap_vmas
                   exit_mmap
                   mmput.part.18
                   exec_mmap
                   flush_old_exec
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7fd26a96d0f7
                   __execve

     0.00%             gpg  ld-2.14.1.so                [.] _dl_relocate_object
               |
               --- _dl_relocate_object
                   dl_main
                   _dl_sysdep_start

     0.00%             gpg  [kernel.kallsyms]           [k] copy_page
                       |
                       --- copy_page
                          |          
                          |--66.67%-- __do_fault
                          |          handle_pte_fault
                          |          do_page_fault
                          |          page_fault
                          |          |          
                          |          |--50.00%-- 0x7fbd6fd25258
                          |          |          _dl_relocate_object
                          |          |          dl_main
                          |          |          _dl_sysdep_start
                          |          |          
                          |           --50.00%-- __clear_user
                          |                     padzero
                          |                     load_elf_interp
                          |                     load_elf_binary
                          |                     search_binary_handler
                          |                     do_execve_common.isra.27
                          |                     sys_execve
                          |                     stub_execve
                          |                     0x7fd26a96d0f7
                          |                     0x7fd26a96d0f7
                          |          
                           --33.33%-- do_wp_page
                                     handle_pte_fault
                                     do_page_fault
                                     page_fault
                                     0x7fd26ac5b2fe
                                     __reclaim_stacks
                                     zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                                     0x2
                                     std::ctype<char>::~ctype()

     0.00%             gpg  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
               |
               --- _raw_spin_unlock_irqrestore
                  |          
                  |--66.67%-- ata_scsi_queuecmd
                  |          scsi_dispatch_cmd
                  |          scsi_request_fn
                  |          blk_run_queue
                  |          scsi_run_queue
                  |          scsi_next_command
                  |          scsi_io_completion
                  |          blk_done_softirq
                  |          __do_softirq
                  |          call_softirq
                  |          do_softirq
                  |          irq_exit
                  |          do_IRQ
                  |          ret_from_intr
                  |          |          
                  |          |--50.00%-- vfs_read
                  |          |          kernel_read
                  |          |          load_elf_interp
                  |          |          load_elf_binary
                  |          |          search_binary_handler
                  |          |          do_execve_common.isra.27
                  |          |          sys_execve
                  |          |          stub_execve
                  |          |          0x7fd26a96d0f7
                  |          |          0x7fd26a96d0f7
                  |          |          
                  |           --50.00%-- clear_page
                  |                     prep_new_page
                  |                     get_page_from_freelist
                  |                     __alloc_pages_nodemask
                  |                     alloc_pages_vma
                  |                     do_anonymous_page.isra.39
                  |                     do_page_fault
                  |                     page_fault
                  |                     0x7f511cd733cf
                  |                     allocate_dtv
                  |          
                   --33.33%-- pagevec_lru_move_fn
                             drain_cpu_pagevecs
                             lru_add_drain
                             unmap_region
                             do_munmap
                             mmap_region
                             sys_mmap_pgoff
                             system_call_fastpath
                             0x7f5b27cd881a
                             mmap64

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __rcu_read_lock
                 |
                 --- __rcu_read_lock
                    |          
                    |--66.67%-- find_get_page
                    |          __find_get_block_slow.isra.19
                    |          unmap_underlying_metadata
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --33.33%-- find_get_pages_tag
                               pagevec_lookup_tag
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] page_mkclean
                 |
                 --- page_mkclean
                     clear_page_dirty_for_io
                    |          
                    |--66.67%-- mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--50.00%-- write_cache_pages_da
                    |          |          ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          wb_do_writeback
                    |          |          bdi_writeback_thread
                    |          |          kthread
                    |          |          kernel_thread_helper
                    |          |          
                    |           --50.00%-- ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     wb_do_writeback
                    |                     bdi_writeback_thread
                    |                     kthread
                    |                     kernel_thread_helper
                    |          
                     --33.33%-- write_cache_pages
                               generic_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] cache_grow
                 |
                 --- cache_grow
                     cache_alloc_refill
                     kmem_cache_alloc
                    |          
                    |--66.67%-- ext4_init_io_end
                    |          io_submit_init.isra.4
                    |          io_submit_add_bh
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --33.33%-- ext4_bio_write_page
                               mpage_da_submit_io
                               mpage_da_map_and_submit
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __find_get_block_slow.isra.19
                 |
                 --- __find_get_block_slow.isra.19
                     unmap_underlying_metadata
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%  apper-sentinel  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
            |
            --- _raw_spin_unlock_irqrestore
                ata_scsi_queuecmd
                scsi_dispatch_cmd
                scsi_request_fn
               |          
               |--66.67%-- blk_flush_plug_list
               |          io_schedule
               |          sleep_on_page_killable
               |          __wait_on_bit_lock
               |          __lock_page_killable
               |          do_generic_file_read.constprop.34
               |          generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call_fastpath
               |          0x7fa296ad85a0
               |          __read_nocancel
               |          
                --33.33%-- __make_request
                          generic_make_request.part.52
                          submit_bio
                          submit_bh
                          ll_rw_block
                          ext4_find_entry
                          ext4_lookup.part.28
                          d_alloc_and_lookup
                          do_lookup
                          path_lookupat
                          do_path_lookup
                          user_path_at
                          vfs_fstatat
                          sys_newstat
                          system_call_fastpath
                          0x7fa296ad7835
                          __xstat64
                          0x7c00000077

     0.00%         uuidgen  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
               |
               --- _raw_spin_unlock_irqrestore
                   ata_scsi_queuecmd
                   scsi_dispatch_cmd
                   scsi_request_fn
                  |          
                  |--50.00%-- __make_request
                  |          generic_make_request.part.52
                  |          submit_bio
                  |          submit_bh
                  |          ll_rw_block
                  |          ext4_bread
                  |          ext4_dx_find_entry
                  |          ext4_find_entry
                  |          ext4_lookup.part.28
                  |          d_alloc_and_lookup
                  |          do_lookup
                  |          do_last
                  |          path_openat
                  |          do_filp_open
                  |          open_exec
                  |          do_execve_common.isra.27
                  |          sys_execve
                  |          stub_execve
                  |          0x7fd26a96d0f7
                  |          __execve
                  |          zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                  |          (nil)
                  |          
                   --50.00%-- blk_flush_plug_list
                             io_schedule
                             sleep_on_page_killable
                             __wait_on_bit_lock
                             __lock_page_killable
                             do_generic_file_read.constprop.34
                             generic_file_aio_read
                             do_sync_read
                             vfs_read
                             sys_read
                             system_call_fastpath
                             0x7fcb2c9606a7
                             read
                             (nil)

     0.00%         swapper  [kernel.kallsyms]           [k] clocksource_watchdog
                   |
                   --- clocksource_watchdog
                       call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] rcu_start_gp
                   |
                   --- rcu_start_gp
                       __rcu_process_callbacks
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] rcu_check_quiescent_state
                   |
                   --- rcu_check_quiescent_state
                       __rcu_process_callbacks
                       rcu_process_callbacks
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] bio_put
                   |
                   --- bio_put
                      |          
                      |--50.00%-- blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --50.00%-- ext4_end_bio
                                 blk_update_request
                                 blk_update_bidi_request
                                 blk_end_bidi_request
                                 scsi_io_completion
                                 blk_done_softirq
                                 __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 do_IRQ
                                 ret_from_intr
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] bio_free
                   |
                   --- bio_free
                      |          
                      |--50.00%-- blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --50.00%-- ext4_end_bio
                                 blk_update_request
                                 blk_update_bidi_request
                                 blk_end_bidi_request
                                 scsi_io_completion
                                 blk_done_softirq
                                 __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 do_IRQ
                                 ret_from_intr
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] ext4_free_io_end
                   |
                   --- ext4_free_io_end
                       ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] blk_update_request
                   |
                   --- blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] blk_end_bidi_request
                   |
                   --- blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] add_timer_randomness
                   |
                   --- add_timer_randomness
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_decide_disposition
                   |
                   --- scsi_decide_disposition
                       scsi_softirq_done
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_run_queue
                   |
                   --- scsi_run_queue
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_device_unbusy
                   |
                   --- scsi_device_unbusy
                       scsi_finish_command
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] ata_scsi_queuecmd
                   |
                   --- ata_scsi_queuecmd
                       scsi_dispatch_cmd
                       scsi_request_fn
                       blk_run_queue
                       scsi_run_queue
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] __schedule
                   |
                   --- __schedule
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] preempt_schedule
                   |
                   --- preempt_schedule
                      |          
                      |--50.00%-- test_clear_page_writeback
                      |          end_page_writeback
                      |          put_io_page
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          smp_apic_timer_interrupt
                      |          apic_timer_interrupt
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --50.00%-- finish_task_switch
                                 thread_return
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.00%           rcuc0  [kernel.kallsyms]           [k] kthread_should_stop
                     |
                     --- kthread_should_stop
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%  plasma-desktop  libQtGui.so.4.7.4           [.] 0x38b477        
            |
            --- 0x7fe13795b477

            |
            --- 0x7fe137d9d718
                (nil)

     0.00%            perf  [kernel.kallsyms]           [k] get_page_from_freelist
                      |
                      --- get_page_from_freelist
                          __alloc_pages_nodemask
                          alloc_pages_current
                          grab_cache_page_write_begin
                          ext4_da_write_begin
                          generic_perform_write
                          generic_file_buffered_write
                          __generic_file_aio_write
                          generic_file_aio_write
                          ext4_file_write
                          do_sync_write
                          vfs_write
                          sys_write
                          system_call_fastpath
                          0x7fc290131d50
                          __libc_write

     0.00%            perf  [kernel.kallsyms]           [k] copy_user_generic_unrolled
                      |
                      --- copy_user_generic_unrolled
                          iov_iter_copy_from_user_atomic
                          generic_perform_write
                          generic_file_buffered_write
                          __generic_file_aio_write
                          generic_file_aio_write
                          ext4_file_write
                          do_sync_write
                          vfs_write
                          sys_write
                          system_call_fastpath
                          0x7fc290131d50
                          __libc_write

     0.00%     packagekitd  libstdc++.so.6.0.16         [.] std::string::_Rep::_M_destroy(std::allocator<char> const&)
               |
               --- std::string::_Rep::_M_destroy(std::allocator<char> const&)

     0.00%     packagekitd  libsqlite3.so.0.8.6         [.] 0xf136          
               |
               --- 0x7fd26bd30136
                   0x7fd26bd3026f
                   0x7fd26bd559b1
                   0x7fd26bd55a55
                   0x7fd26bd55b0b
                   0x7fd26bd8e92a
                   0x7fd26bd93244
                   0x7fd26bda4cad
                   0x7fd26bda799c
                   0x7fd26bda8767
                   0x7fd26bd8b90e
                   0x7fd26bd8bc4a
                   sqlite3_prepare
                   sqlite3_exec
                   0x7fd26bd8b275
                   0x7fd26bd8b428
                   0x7fd26bd8b526
                   0x7fd26bd88882
                   0x7fd26bda6eb7
                   0x7fd26bda799c
                   0x7fd26bda8767
                   0x7fd26bd8b90e
                   0x7fd26bd8bc4a
                   sqlite3_prepare
                   sqlite3_exec
                   0x420646

               |
               --- 0x7fd26bd5559a
                   0x7fd26bd97542
                   0x7fd26bd983d2
                   0x7fd26bda5644
                   0x7fd26bda799c
                   0x7fd26bda8767
                   0x7fd26bd8b90e
                   0x7fd26bd8bc4a
                   sqlite3_prepare
                   sqlite3_exec
                   0x434531

     0.00%     packagekitd  librpm.so.2.0.2             [.] __lock_open_rpmdb
               |
               --- __lock_open_rpmdb

     0.00%     packagekitd  librpm.so.2.0.2             [.] __mutex_open_rpmdb
               |
               --- __mutex_open_rpmdb

     0.00%     packagekitd  librpm.so.2.0.2             [.] __memp_init_rpmdb
               |
               --- __memp_init_rpmdb

     0.00%     packagekitd  librpm.so.2.0.2             [.] 0x2f524         
               |
               --- 0x7fd26662b524

               |
               --- 0x7fd26662b530

     0.00%     packagekitd  libc-2.14.1.so              [.] vfprintf
               |
               --- vfprintf
                   __vasprintf_chk
                  |          
                  |--50.00%-- 0x7fd263035830
                  |          
                   --50.00%-- 0x7fd2630355f8

     0.00%     packagekitd  libc-2.14.1.so              [.] _IO_vfscanf
               |
               --- _IO_vfscanf
                  |          
                  |--50.00%-- 0x7fd2630352b0
                  |          
                   --50.00%-- _IO_vsscanf
                             0x7fd263034730

     0.00%     packagekitd  libc-2.14.1.so              [.] re_search_internal
               |
               --- re_search_internal

     0.00%     packagekitd  [kernel.kallsyms]           [k] get_page_from_freelist
               |
               --- get_page_from_freelist
                   __alloc_pages_nodemask
                  |          
                  |--50.00%-- alloc_pages_vma
                  |          do_wp_page
                  |          handle_pte_fault
                  |          do_page_fault
                  |          page_fault
                  |          0x7fd26c6b079a
                  |          _dl_map_object_from_fd
                  |          _dl_map_object
                  |          
                   --50.00%-- alloc_pages_current
                             pte_alloc_one
                             __pte_alloc
                             copy_pte_range
                             copy_page_range
                             dup_mmap
                             dup_mm
                             copy_mm
                             copy_process.part.20
                             do_fork
                             stub_clone
                             0x7fd26a96cdf6
                             __libc_fork
                             zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                             0x2
                             std::ctype<char>::~ctype()
                             0x480028a2e1058b48

     0.00%     packagekitd  [kernel.kallsyms]           [k] do_wp_page
               |
               --- do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                  |          
                  |--50.00%-- 0x7fd266767102
                  |          __memp_init_rpmdb
                  |          
                   --50.00%-- 0x7fd2674a7e12
                             0x7fd2674a7e12

     0.00%     packagekitd  [kernel.kallsyms]           [k] copy_page_range
               |
               --- copy_page_range
                   dup_mmap
                   dup_mm
                   copy_mm
                   copy_process.part.20
                   do_fork
                   stub_clone
                   0x7fd26a96cdf6
                   __libc_fork
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()
                   0x480028a2e1058b48

     0.00%     packagekitd  [kernel.kallsyms]           [k] kmem_cache_free
               |
               --- kmem_cache_free
                  |          
                  |--50.00%-- __sg_free_table
                  |          __scsi_release_buffers
                  |          scsi_io_completion
                  |          blk_done_softirq
                  |          __do_softirq
                  |          call_softirq
                  |          do_softirq
                  |          irq_exit
                  |          do_IRQ
                  |          ret_from_intr
                  |          clear_page
                  |          prep_new_page
                  |          get_page_from_freelist
                  |          __alloc_pages_nodemask
                  |          alloc_pages_vma
                  |          do_anonymous_page.isra.39
                  |          do_page_fault
                  |          page_fault
                  |          0x7fd2666fda41
                  |          __mutex_open_rpmdb
                  |          
                   --50.00%-- unlink_anon_vmas
                             free_pgtables
                             exit_mmap
                             mmput.part.18
                             exit_mm
                             do_exit
                             do_group_exit
                             sys_exit_group
                             system_call_fastpath
                             0x7fd26a96d0d8

     0.00%     packagekitd  [kernel.kallsyms]           [k] link_path_walk
               |
               --- link_path_walk
                   path_openat
                   do_filp_open
                   do_sys_open
                   system_call_fastpath
                  |          
                  |--50.00%-- 0x7fd26a99023d
                  |          __GI___libc_open
                  |          
                   --50.00%-- 0x7fd26a990220
                             __GI___libc_open

     0.00%     packagekitd  [kernel.kallsyms]           [k] cpumask_any_but
               |
               --- cpumask_any_but
                   flush_tlb_page
                   ptep_clear_flush
                   try_to_unmap_one
                   try_to_unmap_file
                   try_to_unmap
                   unmap_and_move
                   migrate_pages
                   compact_zone.part.15
                   compact_zone_order
                   try_to_compact_pages
                   __alloc_pages_direct_compact
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_huge_pmd_anonymous_page
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] radix_tree_lookup_element
               |
               --- radix_tree_lookup_element
                  |          
                  |--50.00%-- find_get_page
                  |          __find_get_block_slow.isra.19
                  |          __find_get_block
                  |          __getblk
                  |          ext4_get_branch
                  |          ext4_ind_map_blocks
                  |          ext4_map_blocks
                  |          _ext4_get_block
                  |          do_mpage_readpage
                  |          mpage_readpages
                  |          read_pages
                  |          __do_page_cache_readahead
                  |          ra_submit
                  |          filemap_fault
                  |          __do_fault
                  |          handle_pte_fault
                  |          do_page_fault
                  |          page_fault
                  |          0x7fd26c6c1a33
                  |          memset
                  |          _dl_map_object
                  |          
                   --50.00%-- __do_page_cache_readahead
                             ra_submit
                             filemap_fault
                             __do_fault
                             handle_pte_fault
                             do_page_fault
                             page_fault
                             0x7fd267311920
                             zypp::target::rpm::BinHeader::BinHeader(headerToken_s*)

     0.00%     packagekitd  [kernel.kallsyms]           [k] find_next_bit
               |
               --- find_next_bit
                   cpumask_any_but
                   flush_tlb_page
                   ptep_set_access_flags
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     kworker/0:1  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
               |
               --- _raw_spin_unlock_irq
                  |          
                  |--50.00%-- cache_reap
                  |          process_one_work
                  |          worker_thread
                  |          kthread
                  |          kernel_thread_helper
                  |          
                   --50.00%-- scsi_request_fn
                             cfq_kick_queue
                             process_one_work
                             worker_thread
                             kthread
                             kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] end_page_writeback
                   |
                   --- end_page_writeback
                       put_io_page
                       ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                      |          
                      |--50.00%-- kmem_cache_free
                      |          free_buffer_head
                      |          try_to_free_buffers
                      |          shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                       --50.00%-- free_hot_cold_page
                                 __pagevec_free
                                 free_page_list
                                 shrink_page_list
                                 shrink_inactive_list
                                 shrink_zone
                                 balance_pgdat
                                 kswapd
                                 kthread
                                 kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] pagevec_lru_move_fn
                   |
                   --- pagevec_lru_move_fn
                       drain_cpu_pagevecs
                       lru_add_drain
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] drain_cpu_pagevecs
                   |
                   --- drain_cpu_pagevecs
                       lru_add_drain
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] cancel_dirty_page
                   |
                   --- cancel_dirty_page
                       try_to_free_buffers
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] page_referenced_file
                   |
                   --- page_referenced_file
                       page_referenced
                       shrink_active_list.isra.56
                       shrink_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] page_referenced
                   |
                   --- page_referenced
                       page_check_references.isra.50
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] __mem_cgroup_largest_soft_limit_node
                   |
                   --- __mem_cgroup_largest_soft_limit_node
                       mem_cgroup_soft_limit_reclaim
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] mem_cgroup_uncharge_cache_page
                   |
                   --- mem_cgroup_uncharge_cache_page
                       __remove_mapping
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] lookup_page_cgroup
                   |
                   --- lookup_page_cgroup
                       __mem_cgroup_uncharge_common
                       __remove_mapping
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] mb_cache_shrink_fn
                   |
                   --- mb_cache_shrink_fn
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] walk_page_buffers
                   |
                   --- walk_page_buffers
                       ext4_writepage
                       pageout
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%          iozone  [kernel.kallsyms]           [k] lock_timer_base.isra.30
                    |
                    --- lock_timer_base.isra.30
                       |          
                       |--50.00%-- try_to_del_timer_sync
                       |          del_timer_sync
                       |          schedule_timeout
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --50.00%-- schedule_timeout
                                  io_schedule_timeout
                                  balance_dirty_pages.isra.15
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] ktime_get_ts
                    |
                    --- ktime_get_ts
                        delayacct_end
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] balance_dirty_pages_ratelimited_nr
                    |
                    --- balance_dirty_pages_ratelimited_nr
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] inc_zone_page_state
                    |
                    --- inc_zone_page_state
                        test_clear_page_writeback
                        end_page_writeback
                        put_io_page
                        ext4_end_bio
                        blk_update_request
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                       |          
                       |--50.00%-- ext4_journal_start_sb
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --50.00%-- ext4_do_update_inode
                                  ext4_mark_iloc_dirty
                                  ext4_mark_inode_dirty
                                  ext4_dirty_inode
                                  __mark_inode_dirty
                                  file_update_time
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] memcg_check_events
                    |
                    --- memcg_check_events
                        __mem_cgroup_commit_charge_lrucare
                        mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] wait_sb_inodes
                    |
                    --- wait_sb_inodes
                        sync_inodes_sb
                        __sync_filesystem
                        iterate_supers
                        sys_sync
                        ia32_sysret
                        sync
                        0x80928e6
                        __libc_start_main

     0.00%          iozone  [kernel.kallsyms]           [k] unlock_buffer
                    |
                    --- unlock_buffer
                        block_invalidatepage
                        truncate_inode_page
                        truncate_inode_pages_range
                       |          
                       |--50.00%-- truncate_pagecache
                       |          ext4_setattr
                       |          notify_change
                       |          do_truncate
                       |          do_sys_ftruncate.constprop.13
                       |          ia32_sysret
                       |          __GI___ftruncate
                       |          
                        --50.00%-- ext4_evict_inode
                                  evict
                                  do_unlinkat
                                  ia32_sysret
                                  __GI___unlink

     0.00%          iozone  [kernel.kallsyms]           [k] ext4_get_inode_loc
                    |
                    --- ext4_get_inode_loc
                        ext4_reserve_inode_write
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] mpage_da_submit_io
                    |
                    --- mpage_da_submit_io
                        mpage_da_map_and_submit
                        ext4_da_writepages
                        __filemap_fdatawrite_range
                        filemap_write_and_wait_range
                        ext4_sync_file
                        do_fsync
                        sys_fsync
                        ia32_sysret
                        __fsync_nocancel
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

     0.00%          iozone  [kernel.kallsyms]           [k] ext4_dirty_inode
                    |
                    --- ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] put_io_page
                    |
                    --- put_io_page
                        ext4_end_bio
                        blk_update_request
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                       |          
                       |--50.00%-- _raw_spin_unlock_irq
                       |          finish_task_switch
                       |          thread_return
                       |          schedule_timeout
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --50.00%-- copy_user_generic_unrolled
                                  iov_iter_copy_from_user_atomic
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] ext4_end_bio
                    |
                    --- ext4_end_bio
                        blk_update_request
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                       |          
                       |--50.00%-- copy_user_generic_unrolled
                       |          iov_iter_copy_from_user_atomic
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --50.00%-- lookup_page_cgroup
                                  __mem_cgroup_commit_charge_lrucare
                                  mem_cgroup_cache_charge
                                  add_to_page_cache_locked
                                  add_to_page_cache_lru
                                  grab_cache_page_write_begin
                                  ext4_da_write_begin
                                  generic_perform_write
                                  generic_file_buffered_write
                                  __generic_file_aio_write
                                  generic_file_aio_write
                                  ext4_file_write
                                  do_sync_write
                                  vfs_write
                                  sys_write
                                  ia32_sysret
                                  0xf77904be
                                  __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] __ext4_handle_dirty_metadata
                    |
                    --- __ext4_handle_dirty_metadata
                        ext4_do_update_inode
                        ext4_mark_iloc_dirty
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] __lookup_tag
                    |
                    --- __lookup_tag
                        radix_tree_gang_lookup_tag_slot
                        find_get_pages_tag
                        pagevec_lookup_tag
                        write_cache_pages_da
                        ext4_da_writepages
                        __filemap_fdatawrite_range
                        filemap_write_and_wait_range
                        ext4_sync_file
                        do_fsync
                        sys_fsync
                        ia32_sysret
                        __fsync_nocancel
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

     0.00%          iozone  [kernel.kallsyms]           [k] thread_return
                    |
                    --- thread_return
                        schedule_timeout
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] _cond_resched
                    |
                    --- _cond_resched
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%            gpg2  libpthread-2.14.1.so        [.] __libc_close
               |
               --- __libc_close
                   (nil)

     0.00%            gpg2  libc-2.14.1.so              [.] __strcmp_sse2
               |
               --- __strcmp_sse2
                  |          
                  |--50.00%-- 0x7fff9b129f24
                  |          0x72672d6f6e2d2d00
                  |          
                   --50.00%-- 0x7fffaceabf06
                             0x79656b2d746c7561

     0.00%            gpg2  [kernel.kallsyms]           [k] find_get_page
                      |
                      --- find_get_page
                          filemap_fault
                          __do_fault
                          handle_pte_fault
                          do_page_fault
                          page_fault
                         |          
                         |--50.00%-- 0x7fb475e3e2a8
                         |          __strcmp_sse2
                         |          0x7ffff2d53f06
                         |          0x79656b2d746c7561
                         |          
                          --50.00%-- 0x7fd6317f6240
                                    _dl_relocate_object
                                    dl_main
                                    _dl_sysdep_start

     0.00%            gpg2  [kernel.kallsyms]           [k] __alloc_pages_nodemask
               |
               --- __alloc_pages_nodemask
                   alloc_pages_vma
                   do_anonymous_page.isra.39
                   do_page_fault
                   page_fault
                  |          
                  |--50.00%-- file_read_actor
                  |          do_generic_file_read.constprop.34
                  |          generic_file_aio_read
                  |          do_sync_read
                  |          vfs_read
                  |          sys_read
                  |          system_call_fastpath
                  |          0x7fea9ab175a0
                  |          __read_nocancel
                  |          
                   --50.00%-- 0x7f5749c7532f
                             __memset_x86_64

     0.00%            gpg2  [kernel.kallsyms]           [k] handle_mm_fault
               |
               --- handle_mm_fault
                   do_page_fault
                   page_fault
                  |          
                  |--50.00%-- 0x7f07fd65c2e2
                  |          _dl_relocate_object
                  |          dl_main
                  |          _dl_sysdep_start
                  |          
                   --50.00%-- 0x7fd26a938e49
                             ptmalloc_unlock_all2
                             zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                             0x2
                             std::ctype<char>::~ctype()

     0.00%            gpg2  [kernel.kallsyms]           [k] move_ptes.isra.4
                      |
                      --- move_ptes.isra.4
                          move_page_tables
                          shift_arg_pages
                          setup_arg_pages
                          load_elf_binary
                          search_binary_handler
                          do_execve_common.isra.27
                          sys_execve
                          stub_execve
                          0x7fd26a96d0f7
                          0x7fd26a96d0f7

     0.00%            gpg2  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
               |
               --- _raw_spin_unlock_irq
                   scsi_request_fn
                  |          
                  |--50.00%-- blk_run_queue
                  |          scsi_run_queue
                  |          scsi_next_command
                  |          scsi_io_completion
                  |          blk_done_softirq
                  |          __do_softirq
                  |          call_softirq
                  |          do_softirq
                  |          irq_exit
                  |          do_IRQ
                  |          ret_from_intr
                  |          clear_page
                  |          prep_new_page
                  |          get_page_from_freelist
                  |          __alloc_pages_nodemask
                  |          alloc_pages_vma
                  |          do_anonymous_page.isra.39
                  |          do_page_fault
                  |          page_fault
                  |          file_read_actor
                  |          do_generic_file_read.constprop.34
                  |          generic_file_aio_read
                  |          do_sync_read
                  |          vfs_read
                  |          sys_read
                  |          system_call_fastpath
                  |          0x7f842155d5a0
                  |          __read_nocancel
                  |          
                   --50.00%-- __make_request
                             generic_make_request.part.52
                             submit_bio
                             ext4_io_submit
                             mpage_da_submit_io
                             mpage_da_map_and_submit
                             ext4_da_writepages
                             __filemap_fdatawrite_range
                             ext4_rename
                             vfs_rename_other
                             vfs_rename
                             sys_renameat
                             system_call_fastpath
                             0x7f7e8be03c07
                             rename

     0.00%            gpg2  [kernel.kallsyms]           [k] do_page_fault
                      |
                      --- do_page_fault
                          page_fault
                         |          
                         |--50.00%-- 0x7fde4ec66a55
                         |          _dl_load_cache_lookup
                         |          
                          --50.00%-- 0x7f7e8be48770
                                    __GI___uname

     0.00%             gpg  libc-2.14.1.so              [.] __strcmp_sse2
               |
               --- __strcmp_sse2
                  |          
                  |--50.00%-- 0x7fff6efcef7f
                  |          0x762f00310064662d
                  |          
                   --50.00%-- 0x7fff53c77f7f
                             0x762f00310064662d

     0.00%             gpg  ld-2.14.1.so                [.] _dl_map_object_from_fd
               |
               --- _dl_map_object_from_fd
                   _dl_map_object

     0.00%             gpg  ld-2.14.1.so                [.] do_lookup_x
                       |
                       --- do_lookup_x

     0.00%             gpg  ld-2.14.1.so                [.] _dl_lookup_symbol_x
               |
               --- _dl_lookup_symbol_x
                  |          
                  |--50.00%-- _dl_fixup
                  |          
                   --50.00%-- _dl_relocate_object
                             dl_main
                             _dl_sysdep_start

     0.00%             gpg  ld-2.14.1.so                [.] _dl_fixup
               |
               --- _dl_fixup

     0.00%             gpg  [kernel.kallsyms]           [k] unlink_anon_vmas
               |
               --- unlink_anon_vmas
                   free_pgtables
                   exit_mmap
                   mmput.part.18
                  |          
                  |--50.00%-- exec_mmap
                  |          flush_old_exec
                  |          load_elf_binary
                  |          search_binary_handler
                  |          do_execve_common.isra.27
                  |          sys_execve
                  |          stub_execve
                  |          0x7fd26a96d0f7
                  |          __execve
                  |          
                   --50.00%-- exit_mm
                             do_exit
                             do_group_exit
                             sys_exit_group
                             system_call_fastpath
                             0x7f808104b0d8

     0.00%             gpg  [kernel.kallsyms]           [k] sys_close
               |
               --- sys_close
                   system_call_fastpath
                   0x7fd26ac62e2d
                   __libc_close
                   0x7fd2670d4e18
                   std::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_stringstream()

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __rcu_read_unlock
                 |
                 --- __rcu_read_unlock
                    |          
                    |--50.00%-- find_get_pages_tag
                    |          pagevec_lookup_tag
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_check_old_data_flush
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --50.00%-- find_get_page
                               __find_get_block_slow.isra.19
                               unmap_underlying_metadata
                               mpage_da_map_and_submit
                               write_cache_pages_da
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] writeback_sb_inodes
                 |
                 --- writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] mpage_da_map_and_submit
                 |
                 --- mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                    |          
                    |--50.00%-- wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --50.00%-- wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] put_io_page
                 |
                 --- put_io_page
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                    |          
                    |--50.00%-- write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --50.00%-- ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_block_bitmap
                 |
                 --- ext4_block_bitmap
                     ext4_read_block_bitmap
                     ext4_mb_mark_diskspace_used
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_ind_map_blocks
                 |
                 --- ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] task_blkio_cgroup
                 |
                 --- task_blkio_cgroup
                     blk_throtl_bio
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                    |          
                    |--50.00%-- mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          write_cache_pages_da
                    |          ext4_da_writepages
                    |          writeback_single_inode
                    |          writeback_sb_inodes
                    |          __writeback_inodes_wb
                    |          wb_writeback
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --50.00%-- io_submit_add_bh
                               ext4_bio_write_page
                               mpage_da_submit_io
                               mpage_da_map_and_submit
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] blk_throtl_bio
                 |
                 --- blk_throtl_bio
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                    |          
                    |--50.00%-- wb_check_old_data_flush
                    |          wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --50.00%-- wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] radix_tree_gang_lookup_slot
                 |
                 --- radix_tree_gang_lookup_slot
                     find_get_pages
                     pagevec_lookup
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                    |          
                    |--50.00%-- wb_do_writeback
                    |          bdi_writeback_thread
                    |          kthread
                    |          kernel_thread_helper
                    |          
                     --50.00%-- wb_check_old_data_flush
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] _raw_spin_lock_irqsave
                 |
                 --- _raw_spin_lock_irqsave
                    |          
                    |--50.00%-- 0x282
                    |          
                     --50.00%-- test_set_page_writeback
                               ext4_bio_write_page
                               mpage_da_submit_io
                               mpage_da_map_and_submit
                               ext4_da_writepages
                               writeback_single_inode
                               writeback_sb_inodes
                               __writeback_inodes_wb
                               wb_writeback
                               wb_do_writeback
                               bdi_writeback_thread
                               kthread
                               kernel_thread_helper

     0.00%     dbus-daemon  libc-2.14.1.so              [.] __strcmp_sse2
               |
               --- __strcmp_sse2

     0.00%     dbus-daemon  [kernel.kallsyms]           [k] copy_page
               |
               --- copy_page
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                  |          
                  |--50.00%-- 0x413af3
                  |          0x413af3
                  |          
                   --50.00%-- 0x7f249a04f7cf
                             __memset_sse2

     0.00%     dbus-daemon  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
               |
               --- _raw_spin_unlock_irq
                   finish_task_switch
                   thread_return
                  |          
                  |--50.00%-- io_schedule
                  |          sleep_on_buffer
                  |          __wait_on_bit
                  |          out_of_line_wait_on_bit
                  |          __ext4_get_inode_loc
                  |          ext4_iget
                  |          ext4_lookup.part.28
                  |          d_alloc_and_lookup
                  |          do_lookup
                  |          path_lookupat
                  |          do_path_lookup
                  |          user_path_at
                  |          vfs_fstatat
                  |          sys_newstat
                  |          system_call_fastpath
                  |          0x7f249a098835
                  |          __xstat64
                  |          
                   --50.00%-- schedule_hrtimeout_range_clock
                             poll_schedule_timeout
                             do_poll.isra.4
                             do_sys_poll
                             sys_poll
                             system_call_fastpath
                             0x7f249a09e3e8
                             __poll

     0.00%  apper-sentinel  libdbus-1.so.3.6.4          [.] 0x1630d         
            |
            --- 0x7fa29350c30d
                0x7fa293739910

            |
            --- 0x7fa29351f12a

     0.00%  apper-sentinel  libQtCore.so.4.7.4          [.] 0x18bd72        
            |
            --- 0x7fa298c47d72

            |
            --- 0x7fa298c355a7

     0.00%      virtuoso-t  libpthread-2.14.1.so        [.] __pthread_mutex_unlock_usercnt
                |
                --- __pthread_mutex_unlock_usercnt

     0.00%      virtuoso-t  [kernel.kallsyms]           [k] fget_light
                |
                --- fget_light
                    do_select
                    core_sys_select
                    sys_select
                    system_call_fastpath
                    0x7f07ec2cbc33
                    __select

     0.00%      virtuoso-t  [kernel.kallsyms]           [k] sock_poll
                |
                --- sock_poll
                    do_select
                    core_sys_select
                    sys_select
                    system_call_fastpath
                    0x7f07ec2cbc33
                    __select

     0.00%      virtuoso-t  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                |
                --- _raw_spin_unlock_irqrestore
                    ata_scsi_queuecmd
                    scsi_dispatch_cmd
                    scsi_request_fn
                    queue_unplugged
                    blk_flush_plug_list
                    blk_finish_plug
                    read_pages
                    __do_page_cache_readahead
                    ra_submit
                    filemap_fault
                    __do_fault
                    handle_pte_fault
                    do_page_fault
                    page_fault
                    0x5b015c
                    bif_sys_stat

     0.00%      virtuoso-t  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                |
                --- _raw_spin_unlock_irq
                    finish_task_switch
                    thread_return
                    schedule_hrtimeout_range_clock
                    poll_schedule_timeout
                    do_select
                    core_sys_select
                    sys_select
                    system_call_fastpath
                    0x7f07ec2cbc33
                    __select

     0.00%         uuidgen  ld-2.14.1.so                [.] _dl_fixup
               |
               --- _dl_fixup

     0.00%         uuidgen  [kernel.kallsyms]           [k] arch_vma_name
               |
               --- arch_vma_name
                   perf_event_mmap_event
                   perf_event_mmap
                   do_brk
                   sys_brk
                   system_call_fastpath
                   0x7f1f55295b0a
                   __brk

     0.00%         uuidgen  [kernel.kallsyms]           [k] _raw_spin_lock
               |
               --- _raw_spin_lock
                   zap_pte_range
                   unmap_page_range
                   unmap_vmas
                   exit_mmap
                   mmput.part.18
                   exec_mmap
                   flush_old_exec
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7fd26a96d0f7
                   __execve

     0.00%         systemd  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                   |
                   --- _raw_spin_unlock_irqrestore
                       ata_scsi_queuecmd
                       scsi_dispatch_cmd
                       scsi_request_fn
                       blk_flush_plug_list
                       io_schedule
                       sleep_on_buffer
                       __wait_on_bit
                       out_of_line_wait_on_bit
                       bh_submit_read
                       ext4_get_branch
                       ext4_ind_map_blocks
                       ext4_map_blocks
                       _ext4_get_block
                       do_mpage_readpage
                       mpage_readpages
                       read_pages
                       __do_page_cache_readahead
                       ra_submit
                       filemap_fault
                       __do_fault
                       handle_pte_fault
                       do_page_fault
                       page_fault
                       0x47246a
                       0x47246a

     0.00%         swapper  [kernel.kallsyms]           [k] native_read_tsc
                   |
                   --- native_read_tsc
                       pvclock_clocksource_read
                       kvm_clock_read
                       getnstimeofday
                       ktime_get_real
                       netif_receive_skb
                       napi_skb_finish
                       cp_rx_poll
                       net_rx_action
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] add_timer_on
                   |
                   --- add_timer_on
                       clocksource_watchdog
                       call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] __queue_work
                   |
                   --- __queue_work
                       call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] force_quiescent_state
                   |
                   --- force_quiescent_state
                       __rcu_process_callbacks
                       rcu_process_callbacks
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] rcu_process_callbacks
                   |
                   --- rcu_process_callbacks
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] mempool_free
                   |
                   --- mempool_free
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] put_io_page
                   |
                   --- put_io_page
                       ext4_end_bio
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] blk_run_queue
                   |
                   --- blk_run_queue
                       scsi_run_queue
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] req_bio_endio.isra.46
                   |
                   --- req_bio_endio.isra.46
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] blk_end_request
                   |
                   --- blk_end_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] blk_done_softirq
                   |
                   --- blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] kobject_put
                   |
                   --- kobject_put
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] kobject_get
                   |
                   --- kobject_get
                       get_device
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] kref_get
                   |
                   --- kref_get
                       kobject_get
                       get_device
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] find_next_bit
                   |
                   --- find_next_bit
                       clocksource_watchdog
                       call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] get_device
                   |
                   --- get_device
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_pool_free_command.isra.13
                   |
                   --- scsi_pool_free_command.isra.13
                       __scsi_put_command
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_put_command
                   |
                   --- scsi_put_command
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_log_send
                   |
                   --- scsi_log_send
                       scsi_dispatch_cmd
                       scsi_request_fn
                       blk_run_queue
                       scsi_run_queue
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_dispatch_cmd
                   |
                   --- scsi_dispatch_cmd
                       scsi_request_fn
                       blk_run_queue
                       scsi_run_queue
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] __scsi_release_buffers
                   |
                   --- __scsi_release_buffers
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_init_cmd_errh
                   |
                   --- scsi_init_cmd_errh
                       scsi_request_fn
                       blk_run_queue
                       scsi_run_queue
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] scsi_request_fn
                   |
                   --- scsi_request_fn
                       blk_run_queue
                       scsi_run_queue
                       scsi_next_command
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] ip_finish_output
                   |
                   --- ip_finish_output
                       ip_queue_xmit
                       tcp_transmit_skb
                       tcp_retransmit_skb
                       tcp_retransmit_timer
                       tcp_write_timer
                       call_timer_fn
                       run_timer_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       smp_apic_timer_interrupt
                       apic_timer_interrupt
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] check_leaf.isra.9
                   |
                   --- check_leaf.isra.9
                       fib_table_lookup
                       fib4_rule_action
                       fib_rules_lookup
                       fib_lookup
                       ip_route_input_slow
                       ip_route_input_common
                       arp_process
                       __netif_receive_skb
                       netif_receive_skb
                       napi_skb_finish
                       cp_rx_poll
                       net_rx_action
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] fib_table_lookup
                   |
                   --- fib_table_lookup
                       fib4_rule_action
                       fib_rules_lookup
                       fib_lookup
                       ip_route_input_slow
                       ip_route_input_common
                       arp_process
                       __netif_receive_skb
                       netif_receive_skb
                       napi_skb_finish
                       cp_rx_poll
                       net_rx_action
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [kernel.kallsyms]           [k] thread_return
                   |
                   --- thread_return
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%         swapper  [8139cp]                    [k] cp_start_xmit
                   |
                   --- cp_start_xmit
                       dev_hard_start_xmit
                       sch_direct_xmit
                       dev_queue_xmit
                       ip_finish_output
                       ip_queue_xmit
                       tcp_transmit_skb
                       tcp_rcv_established
                       tcp_v4_do_rcv
                       tcp_v4_rcv
                       ip_local_deliver_finish
                       __netif_receive_skb
                       netif_receive_skb
                       napi_skb_finish
                       cp_rx_poll
                       net_rx_action
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     0.00%            sshd  sshd                        [.] 0x49bf4         
                      |
                      --- 0x7f90cd8c0bf4

     0.00%            sshd  libc-2.14.1.so              [.] __select
                      |
                      --- __select

     0.00%            sshd  [kernel.kallsyms]           [k] __do_softirq
                      |
                      --- __do_softirq
                          call_softirq
                          do_softirq
                          irq_exit
                          do_IRQ
                          ret_from_intr
                          rcu_note_context_switch
                          __schedule
                          schedule_hrtimeout_range_clock
                          poll_schedule_timeout
                          do_select
                          core_sys_select
                          sys_select
                          system_call_fastpath
                          0x7f90cba33c13
                          __select
                          0xcdafb2fc00986684

     0.00%            sshd  [8139cp]                    [k] cp_rx_poll
                      |
                      --- cp_rx_poll
                          net_rx_action
                          __do_softirq
                          call_softirq
                          do_softirq
                          irq_exit
                          do_IRQ
                          ret_from_intr
                          sys_select
                          system_call_fastpath
                          0x7f90cba33c13
                          __select

     0.00%           rcuc0  [kernel.kallsyms]           [k] do_softirq
                     |
                     --- do_softirq
                         local_bh_enable
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%           rcuc0  [kernel.kallsyms]           [k] rcu_start_gp
                     |
                     --- rcu_start_gp
                         __rcu_process_callbacks
                         __do_softirq
                         call_softirq
                         do_softirq
                         local_bh_enable
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%           rcuc0  [kernel.kallsyms]           [k] __rcu_process_callbacks
                     |
                     --- __rcu_process_callbacks
                         rcu_process_callbacks
                         __do_softirq
                         call_softirq
                         do_softirq
                         local_bh_enable
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%           rcuc0  [kernel.kallsyms]           [k] rcu_preempt_note_context_switch
                     |
                     --- rcu_preempt_note_context_switch
                         __schedule
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%           rcuc0  [kernel.kallsyms]           [k] rcu_note_context_switch
                     |
                     --- rcu_note_context_switch
                         __schedule
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%           rcuc0  [kernel.kallsyms]           [k] __d_free
                     |
                     --- __d_free
                         rcu_do_batch.isra.20
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%           rcuc0  [kernel.kallsyms]           [k] invoke_rcu_callbacks_kthread
                     |
                     --- invoke_rcu_callbacks_kthread
                         __do_softirq
                         call_softirq
                         do_softirq
                         local_bh_enable
                         rcu_cpu_kthread
                         kthread
                         kernel_thread_helper

     0.00%         polkitd  libpthread-2.14.1.so        [.] pthread_getspecific
                   |
                   --- pthread_getspecific

     0.00%         polkitd  [kernel.kallsyms]           [k] memcpy_toiovec
                   |
                   --- memcpy_toiovec
                       unix_stream_recvmsg
                       sock_recvmsg
                       __sys_recvmsg
                       sys_recvmsg
                       system_call_fastpath
                       0x7f9f7b3c421d
                       0x7f9f7b3c421d
                       0x7f9f740045e0

     0.00%  plasma-desktop  libglib-2.0.so.0.3000.1     [.] g_main_context_acquire
            |
            --- g_main_context_acquire

     0.00%  plasma-desktop  libc-2.14.1.so              [.] _int_malloc
            |
            --- _int_malloc

     0.00%            perf  [kernel.kallsyms]           [k] __mark_inode_dirty
                      |
                      --- __mark_inode_dirty
                          __block_commit_write.isra.22
                          block_write_end
                          generic_write_end
                          ext4_da_write_end
                          generic_perform_write
                          generic_file_buffered_write
                          __generic_file_aio_write
                          generic_file_aio_write
                          ext4_file_write
                          do_sync_write
                          vfs_write
                          sys_write
                          system_call_fastpath
                          0x7fc290131d50
                          __libc_write

     0.00%            perf  [kernel.kallsyms]           [k] ext4_da_get_block_prep
                      |
                      --- ext4_da_get_block_prep
                          __block_write_begin
                          ext4_da_write_begin
                          generic_perform_write
                          generic_file_buffered_write
                          __generic_file_aio_write
                          generic_file_aio_write
                          ext4_file_write
                          do_sync_write
                          vfs_write
                          sys_write
                          system_call_fastpath
                          0x7fc290131d50
                          __libc_write

     0.00%            perf  [kernel.kallsyms]           [k] ext4_da_write_end
                      |
                      --- ext4_da_write_end
                          generic_perform_write
                          generic_file_buffered_write
                          __generic_file_aio_write
                          generic_file_aio_write
                          ext4_file_write
                          do_sync_write
                          vfs_write
                          sys_write
                          system_call_fastpath
                          0x7fc290131d50
                          __libc_write

     0.00%            perf  [kernel.kallsyms]           [k] blk_flush_plug_list
                      |
                      --- blk_flush_plug_list
                          blk_finish_plug
                          generic_file_aio_write
                          ext4_file_write
                          do_sync_write
                          vfs_write
                          sys_write
                          system_call_fastpath
                          0x7fc290131d50
                          __libc_write

     0.00%     packagekitd  packagekitd                 [.] pk_transaction_priv_get_role
               |
               --- pk_transaction_priv_get_role

     0.00%     packagekitd  libzypp.so.1003.0.2         [.] zypp::url::UrlBase::config(std::string const&) const
               |
               --- zypp::url::UrlBase::config(std::string const&) const

     0.00%     packagekitd  libzypp.so.1003.0.2         [.] zypp::filesystem::Pathname::_assign(std::string const&)
               |
               --- zypp::filesystem::Pathname::_assign(std::string const&)
                   (nil)

     0.00%     packagekitd  libzypp.so.1003.0.2         [.] zypp::PublicKey::Impl::readFromFile()
               |
               --- zypp::PublicKey::Impl::readFromFile()
                   (nil)

     0.00%     packagekitd  libzypp.so.1003.0.2         [.] zypp::filesystem::TmpPath::~TmpPath()
               |
               --- zypp::filesystem::TmpPath::~TmpPath()

     0.00%     packagekitd  libzypp.so.1003.0.2         [.] zypp::base::ReferenceCounted::ReferenceCounted()
               |
               --- zypp::base::ReferenceCounted::ReferenceCounted()

     0.00%     packagekitd  libstdc++.so.6.0.16         [.] _Znwm at plt
               |
               --- _Znwm at plt
                   0x697840

     0.00%     packagekitd  libstdc++.so.6.0.16         [.] std::__basic_file<char>::close()
               |
               --- std::__basic_file<char>::close()
                   0x7fd263036101

     0.00%     packagekitd  libstdc++.so.6.0.16         [.] std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&)
               |
               --- std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&)
                   std::basic_ios<char, std::char_traits<char> >::_M_cache_locale(std::locale const&)
                   0x6
                   virtual thunk to std::basic_ofstream<char, std::char_traits<char> >::~basic_ofstream()
                   0x441f0f669007

     0.00%     packagekitd  libstdc++.so.6.0.16         [.] std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&)
               |
               --- std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&)

     0.00%     packagekitd  libstdc++.so.6.0.16         [.] char* std::string::_S_construct<char const*>(char const*, char const*, std::allocator<char> const&, std::forward_iterator_tag)
               |
               --- char* std::string::_S_construct<char const*>(char const*, char const*, std::allocator<char> const&, std::forward_iterator_tag)

     0.00%     packagekitd  librpmio.so.2.0.1           [.] rcalloc
               |
               --- rcalloc

     0.00%     packagekitd  librpmio.so.2.0.1           [.] mpsetx
               |
               --- mpsetx

     0.00%     packagekitd  librpm.so.2.0.2             [.] __db_close_rpmdb
               |
               --- __db_close_rpmdb

     0.00%     packagekitd  librpm.so.2.0.2             [.] __db_hashinit_rpmdb
               |
               --- __db_hashinit_rpmdb

     0.00%     packagekitd  librpm.so.2.0.2             [.] __env_alloc_free_rpmdb
               |
               --- __env_alloc_free_rpmdb

     0.00%     packagekitd  librpm.so.2.0.2             [.] __memp_fput_rpmdb
               |
               --- __memp_fput_rpmdb

     0.00%     packagekitd  librpm.so.2.0.2             [.] __memp_env_refresh_rpmdb
               |
               --- __memp_env_refresh_rpmdb

     0.00%     packagekitd  librpm.so.2.0.2             [.] __memp_sync_int_rpmdb
               |
               --- __memp_sync_int_rpmdb

     0.00%     packagekitd  libgobject-2.0.so.0.3000.1  [.] 0x12c65         
               |
               --- 0x7fd26b584c65

     0.00%     packagekitd  libglib-2.0.so.0.3000.1     [.] g_list_prepend
               |
               --- g_list_prepend

     0.00%     packagekitd  libglib-2.0.so.0.3000.1     [.] g_slice_free_chain_with_offset
               |
               --- g_slice_free_chain_with_offset

     0.00%     packagekitd  libgio-2.0.so.0.3000.1      [.] 0xe7b79         
               |
               --- 0x7fd26b8a9b79
                   __run_exit_handlers

     0.00%     packagekitd  libc-2.14.1.so              [.] setlocale
               |
               --- setlocale
                   0x7fd263036580

     0.00%     packagekitd  libc-2.14.1.so              [.] getenv
               |
               --- getenv

     0.00%     packagekitd  libc-2.14.1.so              [.] strtol
               |
               --- strtol
                   0x200000000
                   0x6e65626400657a69

     0.00%     packagekitd  libc-2.14.1.so              [.] _IO_no_init
               |
               --- _IO_no_init
                   0x7fd263035b60

     0.00%     packagekitd  libc-2.14.1.so              [.] malloc_consolidate
               |
               --- malloc_consolidate

     0.00%     packagekitd  libc-2.14.1.so              [.] malloc
               |
               --- malloc

     0.00%     packagekitd  libc-2.14.1.so              [.] free
               |
               --- free

     0.00%     packagekitd  libc-2.14.1.so              [.] __strchr_sse2
               |
               --- __strchr_sse2

     0.00%     packagekitd  libc-2.14.1.so              [.] update_vars
               |
               --- update_vars

     0.00%     packagekitd  libc-2.14.1.so              [.] __GI___uname
               |
               --- __GI___uname

     0.00%     packagekitd  libc-2.14.1.so              [.] postorder
               |
               --- postorder

     0.00%     packagekitd  libc-2.14.1.so              [.] create_tree
               |
               --- create_tree
                   0x7fd254000014

     0.00%     packagekitd  libc-2.14.1.so              [.] check_halt_state_context.isra.22
               |
               --- check_halt_state_context.isra.22
                   0x7fd25405e8f8

     0.00%     packagekitd  libc-2.14.1.so              [.] parse_expression
               |
               --- parse_expression
                   0x2b00000030000000

     0.00%     packagekitd  libc-2.14.1.so              [.] __GI___mmap64
               |
               --- __GI___mmap64

     0.00%     packagekitd  ld-2.14.1.so                [.] strcmp
               |
               --- strcmp
                   0x686660

     0.00%     packagekitd  [kernel.kallsyms]           [k] ptep_set_access_flags
               |
               --- ptep_set_access_flags
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] flush_tlb_page
               |
               --- flush_tlb_page
                   ptep_set_access_flags
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] do_fork
               |
               --- do_fork
                   stub_clone
                   0x7fd26a96cdf6
                   __libc_fork
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()
                   0x480028a2e1058b48

     0.00%     packagekitd  [kernel.kallsyms]           [k] put_pid
               |
               --- put_pid
                   __fput
                   filp_close
                   sys_close
                   system_call_fastpath
                   0x7fd26ac62e2d
                   __libc_close

     0.00%     packagekitd  [kernel.kallsyms]           [k] alloc_pid
               |
               --- alloc_pid
                   copy_process.part.20
                   do_fork
                   stub_clone
                   0x7fd26a96cdf6
                   __libc_fork
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()
                   0x480028a2e1058b48

     0.00%     packagekitd  [kernel.kallsyms]           [k] perf_event_task
               |
               --- perf_event_task
                   copy_process.part.20
                   do_fork
                   stub_clone
                   0x7fd26a96cdf6
                   __libc_fork
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()
                   0x480028a2e1058b48

     0.00%     packagekitd  [kernel.kallsyms]           [k] get_pageblock_flags_group
               |
               --- get_pageblock_flags_group
                   free_hot_cold_page
                   __pagevec_free
                   release_pages
                   pagevec_lru_move_fn
                   __lru_cache_add
                   putback_lru_page
                   unmap_and_move
                   migrate_pages
                   compact_zone.part.15
                   compact_zone_order
                   try_to_compact_pages
                   __alloc_pages_direct_compact
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_huge_pmd_anonymous_page
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] free_pages_prepare
               |
               --- free_pages_prepare
                   __free_pages_ok
                   __tlb_remove_page
                   zap_huge_pmd
                   unmap_page_range
                   unmap_vmas
                   exit_mmap
                   mmput.part.18
                   exit_mm
                   do_exit
                   do_group_exit
                   sys_exit_group
                   system_call_fastpath
                   0x7fd26a96d0d8

     0.00%     packagekitd  [kernel.kallsyms]           [k] prep_new_page
               |
               --- prep_new_page
                   get_page_from_freelist
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_anonymous_page.isra.39
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] putback_lru_page
               |
               --- putback_lru_page
                   unmap_and_move
                   migrate_pages
                   compact_zone.part.15
                   compact_zone_order
                   try_to_compact_pages
                   __alloc_pages_direct_compact
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_huge_pmd_anonymous_page
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] __inc_zone_state
               |
               --- __inc_zone_state
                   page_add_new_anon_rmap
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd2674bb3c0
                   zypp::base::logger::getStream(char const*, zypp::base::logger::LogLevel, char const*, char const*, int)

     0.00%     packagekitd  [kernel.kallsyms]           [k] find_vma
               |
               --- find_vma
                   do_page_fault
                   page_fault
                   0x7fd26a93b996
                   _int_malloc

     0.00%     packagekitd  [kernel.kallsyms]           [k] vma_merge
               |
               --- vma_merge
                   mmap_region
                   sys_mmap_pgoff
                   system_call_fastpath
                   0x7fd26a99b2aa
                   __GI___mmap64

     0.00%     packagekitd  [kernel.kallsyms]           [k] __page_set_anon_rmap
               |
               --- __page_set_anon_rmap
                   page_add_new_anon_rmap
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd26a93b231
                   _int_malloc

     0.00%     packagekitd  [kernel.kallsyms]           [k] page_add_new_anon_rmap
               |
               --- page_add_new_anon_rmap
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd26a96cfa1
                   __libc_fork
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()
                   0x480028a2e1058b48

     0.00%     packagekitd  [kernel.kallsyms]           [k] unlink_anon_vmas
               |
               --- unlink_anon_vmas
                   free_pgtables
                   exit_mmap
                   mmput.part.18
                   exec_mmap
                   flush_old_exec
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7f28535b70f7
                   __execve

     0.00%     packagekitd  [kernel.kallsyms]           [k] blk_queue_bounce
               |
               --- blk_queue_bounce
                   __make_request
                   generic_make_request.part.52
                   submit_bio
                   mpage_readpages
                   read_pages
                   __do_page_cache_readahead
                   ra_submit
                   filemap_fault
                   __do_fault
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd26c6b5530
                   _dl_relocate_object
                   dl_open_worker

     0.00%     packagekitd  [kernel.kallsyms]           [k] reuse_swap_page
               |
               --- reuse_swap_page
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd26a93b796
                   _int_malloc

     0.00%     packagekitd  [kernel.kallsyms]           [k] alloc_pages_current
               |
               --- alloc_pages_current
                   find_or_create_page
                   grow_dev_page
                   __getblk_slow
                   ext4_getblk
                   ext4_find_entry
                   ext4_lookup.part.28
                   d_alloc_and_lookup
                   do_lookup
                   do_last
                   path_openat
                   do_filp_open
                   open_exec
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7f249a0760f7
                   __execve

     0.00%     packagekitd  [kernel.kallsyms]           [k] migrate_page_copy
               |
               --- migrate_page_copy
                   migrate_page
                   move_to_new_page
                   unmap_and_move
                   migrate_pages
                   compact_zone.part.15
                   compact_zone_order
                   try_to_compact_pages
                   __alloc_pages_direct_compact
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_huge_pmd_anonymous_page
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] unmap_and_move
               |
               --- unmap_and_move
                   migrate_pages
                   compact_zone.part.15
                   compact_zone_order
                   try_to_compact_pages
                   __alloc_pages_direct_compact
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_huge_pmd_anonymous_page
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] migrate_pages
               |
               --- migrate_pages
                   compact_zone.part.15
                   compact_zone_order
                   try_to_compact_pages
                   __alloc_pages_direct_compact
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_huge_pmd_anonymous_page
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] mem_cgroup_charge_statistics.isra.28
               |
               --- mem_cgroup_charge_statistics.isra.28
                   __mem_cgroup_commit_charge
                   __mem_cgroup_commit_charge_lrucare
                   mem_cgroup_cache_charge
                   add_to_page_cache_locked
                   add_to_page_cache_lru
                   mpage_readpages
                   read_pages
                   __do_page_cache_readahead
                   ra_submit
                   filemap_fault
                   __do_fault
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x4364d0
                   0x4364d0

     0.00%     packagekitd  [kernel.kallsyms]           [k] __mem_cgroup_uncharge_common
               |
               --- __mem_cgroup_uncharge_common
                   page_remove_rmap
                   zap_pte_range
                   unmap_page_range
                   unmap_vmas
                   unmap_region
                   do_munmap
                   sys_munmap
                   system_call_fastpath
                   0x7fd26a99b2d7
                   __GI___munmap

     0.00%     packagekitd  [kernel.kallsyms]           [k] mem_cgroup_count_vm_event
               |
               --- mem_cgroup_count_vm_event
                   handle_mm_fault
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] mem_cgroup_charge_common
               |
               --- mem_cgroup_charge_common
                   do_anonymous_page.isra.39
                   do_page_fault
                   page_fault
                   file_read_actor
                   do_generic_file_read.constprop.34
                   generic_file_aio_read
                   do_sync_read
                   vfs_read
                   sys_read
                   system_call_fastpath
                   0x7fd26a9905a0
                   __read_nocancel

     0.00%     packagekitd  [kernel.kallsyms]           [k] put_unused_fd
               |
               --- put_unused_fd
                   do_sys_open
                   system_call_fastpath
                   0x7fd26a990220
                   __GI___libc_open

     0.00%     packagekitd  [kernel.kallsyms]           [k] sys_close
               |
               --- sys_close
                   system_call_fastpath
                   0x7fd26ac62e2d
                   __libc_close

     0.00%     packagekitd  [kernel.kallsyms]           [k] nameidata_to_filp
               |
               --- nameidata_to_filp
                   do_last
                   path_openat
                   do_filp_open
                   do_sys_open
                   system_call_fastpath
                   0x7fd26c6c0647
                   open64

     0.00%     packagekitd  [kernel.kallsyms]           [k] sys_newstat
               |
               --- sys_newstat
                   system_call_fastpath
                   0x7fd26a98f835
                   __xstat64
                   0x5500656d69746c61

     0.00%     packagekitd  [kernel.kallsyms]           [k] bh_lru_install
               |
               --- bh_lru_install
                   __find_get_block
                   __getblk
                   ext4_getblk
                   ext4_find_entry
                   ext4_lookup.part.28
                   d_alloc_and_lookup
                   do_lookup
                   do_last
                   path_openat
                   do_filp_open
                   do_sys_open
                   system_call_fastpath
                   0x7fd26a990220
                   __GI___libc_open

     0.00%     packagekitd  [kernel.kallsyms]           [k] fsnotify
               |
               --- fsnotify
                   vfs_write
                   sys_write
                   system_call_fastpath
                   0x7fd26ac62d6d
                   __libc_write

     0.00%     packagekitd  [kernel.kallsyms]           [k] ext4_mark_inode_dirty
               |
               --- ext4_mark_inode_dirty
                   ext4_dirty_inode
                   __mark_inode_dirty
                   file_update_time
                   __generic_file_aio_write
                   generic_file_aio_write
                   ext4_file_write
                   do_sync_write
                   vfs_write
                   sys_write
                   system_call_fastpath
                   0x7fd26ac62d6d
                   __libc_write

     0.00%     packagekitd  [kernel.kallsyms]           [k] ext4_da_write_end
               |
               --- ext4_da_write_end
                   generic_perform_write
                   generic_file_buffered_write
                   __generic_file_aio_write
                   generic_file_aio_write
                   ext4_file_write
                   do_sync_write
                   vfs_write
                   sys_write
                   system_call_fastpath
                   0x7fd26ac62d6d
                   __libc_write

     0.00%     packagekitd  [kernel.kallsyms]           [k] __ext4_handle_dirty_metadata
               |
               --- __ext4_handle_dirty_metadata
                   ext4_do_update_inode
                   ext4_mark_iloc_dirty
                   ext4_mark_inode_dirty
                   ext4_dirty_inode
                   __mark_inode_dirty
                   generic_write_end
                   ext4_da_write_end
                   generic_perform_write
                   generic_file_buffered_write
                   __generic_file_aio_write
                   generic_file_aio_write
                   ext4_file_write
                   do_sync_write
                   vfs_write
                   sys_write
                   system_call_fastpath
                   0x7fd26ac62d6d
                   __libc_write

     0.00%     packagekitd  [kernel.kallsyms]           [k] rb_insert_color
               |
               --- rb_insert_color
                   __insert_vm_struct
                   vma_adjust
                   __split_vma
                   mprotect_fixup
                   sys_mprotect
                   system_call_fastpath
                   0x7fd26c6c0877
                   mprotect

     0.00%     packagekitd  [kernel.kallsyms]           [k] copy_user_generic_unrolled
               |
               --- copy_user_generic_unrolled
                   file_read_actor
                   do_generic_file_read.constprop.34
                   generic_file_aio_read
                   do_sync_read
                   vfs_read
                   sys_read
                   system_call_fastpath
                   0x7fd26ac62dcd
                   __libc_read
                   0x7fd2540cb001

     0.00%     packagekitd  [kernel.kallsyms]           [k] __strncpy_from_user
               |
               --- __strncpy_from_user
                   do_getname
                   getname_flags
                   user_path_at
                   vfs_fstatat
                   sys_newstat
                   system_call_fastpath
                   0x7fd26a98f835
                   __xstat64
                   0x5500656d69746c61

     0.00%     packagekitd  [kernel.kallsyms]           [k] mutex_trylock
               |
               --- mutex_trylock
                   page_lock_anon_vma
                   try_to_unmap_anon
                   try_to_unmap
                   unmap_and_move
                   migrate_pages
                   compact_zone.part.15
                   compact_zone_order
                   try_to_compact_pages
                   __alloc_pages_direct_compact
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_huge_pmd_anonymous_page
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] _raw_spin_lock
               |
               --- _raw_spin_lock
                   remove_migration_pte
                   rmap_walk
                   move_to_new_page
                   unmap_and_move
                   migrate_pages
                   compact_zone.part.15
                   compact_zone_order
                   try_to_compact_pages
                   __alloc_pages_direct_compact
                   __alloc_pages_nodemask
                   alloc_pages_vma
                   do_huge_pmd_anonymous_page
                   do_page_fault
                   page_fault
                   0x7fd2666fda41
                   __mutex_open_rpmdb

     0.00%     packagekitd  [kernel.kallsyms]           [k] _raw_spin_unlock
               |
               --- _raw_spin_unlock
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd266e8ca6f
                   std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&)
                   0x6d32f8

     0.00%            nscd  ld-2.14.1.so                [.] strcmp
                      |
                      --- strcmp
                          0x7f79c1162ba0

     0.00%            nscd  [kernel.kallsyms]           [k] local_clock
                      |
                      --- local_clock
                          0xffff880029865cb0
                          mmap64

     0.00%            nscd  [kernel.kallsyms]           [k] __vma_link_list
                      |
                      --- __vma_link_list
                          __insert_vm_struct
                          vma_adjust
                          __split_vma
                          mprotect_fixup
                          sys_mprotect
                          system_call_fastpath
                          0x7ff075049877
                          mprotect

     0.00%            nscd  [kernel.kallsyms]           [k] __do_fault
                      |
                      --- __do_fault
                          handle_pte_fault
                          do_page_fault
                          page_fault
                          0x7f79c0f4d864
                          _dl_setup_hash
                          _dl_map_object

     0.00%            nscd  [kernel.kallsyms]           [k] __tlb_remove_page
                      |
                      --- __tlb_remove_page
                          zap_pte_range
                          unmap_page_range
                          unmap_vmas
                          exit_mmap
                          mmput.part.18
                          exit_mm
                          do_exit
                          do_group_exit
                          sys_exit_group
                          system_call_fastpath
                          0x7ff074d4c0d8

     0.00%            nscd  [kernel.kallsyms]           [k] mem_cgroup_pgmajfault
                      |
                      --- mem_cgroup_pgmajfault
                          mem_cgroup_count_vm_event
                          filemap_fault
                          __do_fault
                          handle_pte_fault
                          do_page_fault
                          page_fault
                          0x7f79c0f5aa33
                          memset
                          _dl_map_object

     0.00%          mysqld  mysqld                      [.] Protocol::send_result_set_metadata(List<Item>*, unsigned int)
                    |
                    --- Protocol::send_result_set_metadata(List<Item>*, unsigned int)

     0.00%          mysqld  mysqld                      [.] setup_fields(THD*, Item**, List<Item>&, enum_mark_columns, List<Item>*, bool)
                    |
                    --- setup_fields(THD*, Item**, List<Item>&, enum_mark_columns, List<Item>*, bool)

     0.00%          mysqld  libpthread-2.14.1.so        [.] pthread_mutex_unlock
                    |
                    --- pthread_mutex_unlock

     0.00%          mysqld  libpthread-2.14.1.so        [.] pthread_cond_timedwait@@GLIBC_2.3.2
                    |
                    --- pthread_cond_timedwait@@GLIBC_2.3.2

     0.00%          mysqld  libpthread-2.14.1.so        [.] __pthread_disable_asynccancel
                    |
                    --- __pthread_disable_asynccancel

     0.00%          mysqld  libpthread-2.14.1.so        [.] __lll_unlock_wake
                    |
                    --- __lll_unlock_wake

     0.00%          mysqld  [kernel.kallsyms]           [k] hrtimer_cancel
                    |
                    --- hrtimer_cancel
                        futex_wait
                        do_futex
                        sys_futex
                        system_call_fastpath
                        0x7fb685e031eb
                        pthread_cond_timedwait@@GLIBC_2.3.2

     0.00%          mysqld  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                    |
                    --- _raw_spin_unlock_irq
                        finish_task_switch
                        thread_return
                        futex_wait_queue_me
                        futex_wait
                        do_futex
                        sys_futex
                        system_call_fastpath
                        0x7fb685e031eb
                        pthread_cond_timedwait@@GLIBC_2.3.2

     0.00%   modem-manager  libpthread-2.14.1.so        [.] 0xf240          
             |
             --- 0x7f75bd4ab240
                 0x7f75bccdd07a

     0.00%   modem-manager  libglib-2.0.so.0.3000.1     [.] g_main_context_check
             |
             --- g_main_context_check

     0.00%   modem-manager  libglib-2.0.so.0.3000.1     [.] g_slist_foreach
             |
             --- g_slist_foreach

     0.00%     kworker/0:3  [kernel.kallsyms]           [k] run_timer_softirq
               |
               --- run_timer_softirq
                   __do_softirq
                   call_softirq
                   do_softirq
                   irq_exit
                   smp_apic_timer_interrupt
                   apic_timer_interrupt
                   cfq_kick_queue
                   process_one_work
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%     kworker/0:3  [kernel.kallsyms]           [k] vmstat_update
               |
               --- vmstat_update
                   process_one_work
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%     kworker/0:3  [kernel.kallsyms]           [k] drain_array
               |
               --- drain_array
                   cache_reap
                   process_one_work
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%     kworker/0:3  [kernel.kallsyms]           [k] delay_tsc
               |
               --- delay_tsc
                   ata_sff_pio_task
                   process_one_work
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%     kworker/0:3  [kernel.kallsyms]           [k] thread_return
               |
               --- thread_return
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%     kworker/0:1  [kernel.kallsyms]           [k] mod_timer
               |
               --- mod_timer
                   queue_delayed_work_on
                   process_one_work
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%     kworker/0:0  [sr_mod]                    [k] sr_check_events
               |
               --- sr_check_events
                   cdrom_check_events
                   disk_events_workfn
                   process_one_work
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%     kworker/0:0  [kernel.kallsyms]           [k] native_read_tsc
               |
               --- native_read_tsc
                   delay_tsc
                   ata_sff_pio_task
                   process_one_work
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%     kworker/0:0  [kernel.kallsyms]           [k] cache_reap
               |
               --- cache_reap
                   process_one_work
                   worker_thread
                   kthread
                   kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] finish_task_switch
                   |
                   --- finish_task_switch
                       thread_return
                       schedule_timeout
                       kswapd_try_to_sleep
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] kthread_should_stop
                   |
                   --- kthread_should_stop
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] prepare_to_wait
                   |
                   --- prepare_to_wait
                       kswapd_try_to_sleep
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] finish_wait
                   |
                   --- finish_wait
                       kswapd_try_to_sleep
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] determine_dirtyable_memory
                   |
                   --- determine_dirtyable_memory
                       global_dirty_limits
                       throttle_vm_writeout
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] global_dirty_limits
                   |
                   --- global_dirty_limits
                       throttle_vm_writeout
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] release_pages
                   |
                   --- release_pages
                       pagevec_lru_move_fn
                       drain_cpu_pagevecs
                       lru_add_drain
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] pageout
                   |
                   --- pageout
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] kswapd_try_to_sleep
                   |
                   --- kswapd_try_to_sleep
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] global_reclaimable_pages
                   |
                   --- global_reclaimable_pages
                       determine_dirtyable_memory
                       global_dirty_limits
                       throttle_vm_writeout
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] shrink_dqcache_memory
                   |
                   --- shrink_dqcache_memory
                       shrink_slab
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] ext4_writepage
                   |
                   --- ext4_writepage
                       pageout
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] req_bio_endio.isra.46
                   |
                   --- req_bio_endio.isra.46
                       blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       _raw_spin_unlock_irq
                       putback_lru_pages
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] blk_update_request
                   |
                   --- blk_update_request
                       blk_update_bidi_request
                       blk_end_bidi_request
                       scsi_io_completion
                       blk_done_softirq
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       _raw_spin_unlock_irq
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] ip_rcv
                   |
                   --- ip_rcv
                       __netif_receive_skb
                       netif_receive_skb
                       napi_skb_finish
                       cp_rx_poll
                       net_rx_action
                       __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                       do_IRQ
                       ret_from_intr
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%         kswapd0  [kernel.kallsyms]           [k] __mem_cgroup_target_update.isra.11
                   |
                   --- __mem_cgroup_target_update.isra.11
                       memcg_check_events.part.37
                       __mem_cgroup_uncharge_common
                       __remove_mapping
                       shrink_page_list
                       shrink_inactive_list
                       shrink_zone
                       balance_pgdat
                       kswapd
                       kthread
                       kernel_thread_helper

     0.00%      khugepaged  [kernel.kallsyms]           [k] find_vma
                |
                --- find_vma
                    khugepaged_scan_mm_slot
                    khugepaged_do_scan
                    khugepaged_loop
                    khugepaged
                    kthread
                    kernel_thread_helper

     0.00%           kded4  [kernel.kallsyms]           [k] do_poll.isra.4
                     |
                     --- do_poll.isra.4
                         do_sys_poll
                         sys_poll
                         system_call_fastpath
                         0x7fe137007423
                         __poll

     0.00%           kded4  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                     |
                     --- _raw_spin_unlock_irq
                         finish_task_switch
                         thread_return
                         schedule_hrtimeout_range_clock
                         poll_schedule_timeout
                         do_poll.isra.4
                         do_sys_poll
                         sys_poll
                         system_call_fastpath
                         0x7fe137007423
                         __poll

     0.00%          iozone  [kernel.kallsyms]           [k] pvclock_clocksource_read
                    |
                    --- pvclock_clocksource_read
                        kvm_clock_read
                        ktime_get_ts
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] flush_tlb_page
                    |
                    --- flush_tlb_page
                        ptep_clear_flush
                        do_wp_page
                        handle_pte_fault
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] __wake_up
                    |
                    --- __wake_up
                        __wake_up_bit
                        block_invalidatepage
                        truncate_inode_page
                        truncate_inode_pages_range
                        ext4_evict_inode
                        evict
                        do_unlinkat
                        ia32_sysret
                        __GI___unlink

     0.00%          iozone  [kernel.kallsyms]           [k] init_timer_key
                    |
                    --- init_timer_key
                        schedule_timeout
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] force_quiescent_state
                    |
                    --- force_quiescent_state
                        __rcu_process_callbacks
                        rcu_process_callbacks
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                        copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] unlock_page
                    |
                    --- unlock_page
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] find_get_pages_tag
                    |
                    --- find_get_pages_tag
                        pagevec_lookup_tag
                        write_cache_pages_da
                        ext4_da_writepages
                        __filemap_fdatawrite_range
                        filemap_write_and_wait_range
                        ext4_sync_file
                        do_fsync
                        sys_fsync
                        ia32_sysret
                        __fsync_nocancel
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

     0.00%          iozone  [kernel.kallsyms]           [k] __generic_file_aio_write
                    |
                    --- __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] free_pages_prepare
                    |
                    --- free_pages_prepare
                        free_hot_cold_page
                        __pagevec_free
                        release_pages
                        __pagevec_release
                        truncate_inode_pages_range
                        ext4_evict_inode
                        evict
                        do_unlinkat
                        ia32_sysret
                        __GI___unlink

     0.00%          iozone  [kernel.kallsyms]           [k] pagevec_lru_move_fn
                    |
                    --- pagevec_lru_move_fn
                        __lru_cache_add
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] dec_zone_page_state
                    |
                    --- dec_zone_page_state
                        test_clear_page_writeback
                        end_page_writeback
                        put_io_page
                        ext4_end_bio
                        blk_update_request
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                        mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] handle_mm_fault
                    |
                    --- handle_mm_fault
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] __page_set_anon_rmap
                    |
                    --- __page_set_anon_rmap
                        page_add_new_anon_rmap
                        do_wp_page
                        handle_pte_fault
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] page_add_new_anon_rmap
                    |
                    --- page_add_new_anon_rmap
                        do_wp_page
                        handle_pte_fault
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] try_to_unmap_anon
                    |
                    --- try_to_unmap_anon
                        try_to_unmap
                        unmap_and_move
                        migrate_pages
                        compact_zone.part.15
                        compact_zone_order
                        try_to_compact_pages
                        __alloc_pages_direct_compact
                        __alloc_pages_nodemask
                        alloc_pages_vma
                        do_huge_pmd_anonymous_page
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] try_to_unmap
                    |
                    --- try_to_unmap
                        unmap_and_move
                        migrate_pages
                        compact_zone.part.15
                        compact_zone_order
                        try_to_compact_pages
                        __alloc_pages_direct_compact
                        __alloc_pages_nodemask
                        alloc_pages_vma
                        do_huge_pmd_anonymous_page
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] page_referenced_anon
                    |
                    --- page_referenced_anon
                        page_referenced
                        shrink_active_list.isra.56
                        shrink_zone
                        shrink_zones
                        do_try_to_free_pages
                        try_to_free_pages
                        __alloc_pages_nodemask
                        alloc_pages_vma
                        do_huge_pmd_anonymous_page
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] ptep_clear_flush
                    |
                    --- ptep_clear_flush
                        do_wp_page
                        handle_pte_fault
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] compaction_alloc
                    |
                    --- compaction_alloc
                        unmap_and_move
                        migrate_pages
                        compact_zone.part.15
                        compact_zone_order
                        try_to_compact_pages
                        __alloc_pages_direct_compact
                        __alloc_pages_nodemask
                        alloc_pages_vma
                        do_huge_pmd_anonymous_page
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] remove_migration_pte
                    |
                    --- remove_migration_pte
                        rmap_walk
                        move_to_new_page
                        unmap_and_move
                        migrate_pages
                        compact_zone.part.15
                        compact_zone_order
                        try_to_compact_pages
                        __alloc_pages_direct_compact
                        __alloc_pages_nodemask
                        alloc_pages_vma
                        do_huge_pmd_anonymous_page
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] buffer_migrate_page
                    |
                    --- buffer_migrate_page
                        move_to_new_page
                        unmap_and_move
                        migrate_pages
                        compact_zone.part.15
                        compact_zone_order
                        try_to_compact_pages
                        __alloc_pages_direct_compact
                        __alloc_pages_nodemask
                        alloc_pages_vma
                        do_huge_pmd_anonymous_page
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] __mem_cgroup_threshold
                    |
                    --- __mem_cgroup_threshold
                        memcg_check_events.part.37
                        __mem_cgroup_commit_charge_lrucare
                        mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] mem_cgroup_uncharge_end
                    |
                    --- mem_cgroup_uncharge_end
                        truncate_inode_pages_range
                        truncate_pagecache
                        ext4_setattr
                        notify_change
                        do_truncate
                        do_sys_ftruncate.constprop.13
                        ia32_sysret
                        __GI___ftruncate

     0.00%          iozone  [kernel.kallsyms]           [k] fget_light
                    |
                    --- fget_light
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] __shrink_dcache_sb
                    |
                    --- __shrink_dcache_sb
                        prune_super
                        shrink_slab
                        do_try_to_free_pages
                        try_to_free_pages
                        __alloc_pages_nodemask
                        alloc_pages_vma
                        do_huge_pmd_anonymous_page
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] __mnt_is_readonly
                    |
                    --- __mnt_is_readonly
                        mnt_clone_write
                        file_update_time
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] writeback_in_progress
                    |
                    --- writeback_in_progress
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] generic_write_sync
                    |
                    --- generic_write_sync
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] set_bh_page
                    |
                    --- set_bh_page
                        alloc_page_buffers
                        create_empty_buffers
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] discard_buffer
                    |
                    --- discard_buffer
                        block_invalidatepage
                        truncate_inode_page
                        truncate_inode_pages_range
                        truncate_pagecache
                        ext4_setattr
                        notify_change
                        do_truncate
                        do_sys_ftruncate.constprop.13
                        ia32_sysret
                        __GI___ftruncate

     0.00%          iozone  [kernel.kallsyms]           [k] block_invalidatepage
                    |
                    --- block_invalidatepage
                        truncate_inode_page
                        truncate_inode_pages_range
                        truncate_pagecache
                        ext4_setattr
                        notify_change
                        do_truncate
                        do_sys_ftruncate.constprop.13
                        ia32_sysret
                        __GI___ftruncate

     0.00%          iozone  [kernel.kallsyms]           [k] __bio_add_page.part.14
                    |
                    --- __bio_add_page.part.14
                        io_submit_add_bh
                        ext4_bio_write_page
                        mpage_da_submit_io
                        mpage_da_map_and_submit
                        ext4_da_writepages
                        __filemap_fdatawrite_range
                        filemap_write_and_wait_range
                        ext4_sync_file
                        do_fsync
                        sys_fsync
                        ia32_sysret
                        __fsync_nocancel
                        0x8057120
                        0x805771a
                        0x80928e6
                        __libc_start_main

     0.00%          iozone  [kernel.kallsyms]           [k] do_mpage_readpage
                    |
                    --- do_mpage_readpage
                        mpage_readpages
                        read_pages
                        __do_page_cache_readahead
                        ra_submit
                        filemap_fault
                        __do_fault
                        handle_pte_fault
                        do_page_fault
                        page_fault
                        _exit

     0.00%          iozone  [kernel.kallsyms]           [k] dquot_active.isra.9
                    |
                    --- dquot_active.isra.9
                        __dquot_alloc_space
                        ext4_da_reserve_space
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] ext4_file_write
                    |
                    --- ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] ext4_invalidatepage
                    |
                    --- ext4_invalidatepage
                        truncate_inode_page
                        truncate_inode_pages_range
                        truncate_pagecache
                        ext4_setattr
                        notify_change
                        do_truncate
                        do_sys_ftruncate.constprop.13
                        ia32_sysret
                        __GI___ftruncate

     0.00%          iozone  [kernel.kallsyms]           [k] ext4_reserve_inode_write
                    |
                    --- ext4_reserve_inode_write
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] ext4_free_io_end
                    |
                    --- ext4_free_io_end
                        ext4_end_bio
                        blk_update_request
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                        copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] __ext4_journal_get_write_access
                    |
                    --- __ext4_journal_get_write_access
                        ext4_reserve_inode_write
                        ext4_mark_inode_dirty
                        ext4_dirty_inode
                        __mark_inode_dirty
                        generic_write_end
                        ext4_da_write_end
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] mb_clear_bits
                    |
                    --- mb_clear_bits
                        ext4_free_blocks
                        ext4_clear_blocks
                        ext4_free_data
                        ext4_free_branches.part.14
                        ext4_free_branches.part.14
                        ext4_ind_truncate
                        ext4_truncate.part.38
                        ext4_evict_inode
                        evict
                        do_unlinkat
                        ia32_sysret
                        __GI___unlink

     0.00%          iozone  [kernel.kallsyms]           [k] ext4_free_data
                    |
                    --- ext4_free_data
                        ext4_free_branches.part.14
                        ext4_free_branches.part.14
                        ext4_ind_truncate
                        ext4_truncate.part.38
                        ext4_setattr
                        notify_change
                        do_truncate
                        do_sys_ftruncate.constprop.13
                        ia32_sysret
                        __GI___ftruncate

     0.00%          iozone  [kernel.kallsyms]           [k] blk_account_io_completion
                    |
                    --- blk_account_io_completion
                        blk_update_request
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                        copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] blk_update_bidi_request
                    |
                    --- blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                        copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] blkiocg_update_dispatch_stats
                    |
                    --- blkiocg_update_dispatch_stats
                        blk_throtl_bio
                        generic_make_request.part.52
                        submit_bio
                        submit_bh
                        bh_submit_read
                        ext4_get_branch
                        ext4_ind_map_blocks
                        ext4_map_blocks
                        ext4_da_get_block_prep
                        __block_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] get_index.isra.1
                    |
                    --- get_index.isra.1
                        prio_tree_first
                        prio_tree_next
                        vma_prio_tree_next
                        rmap_walk
                        move_to_new_page
                        unmap_and_move
                        migrate_pages
                        compact_zone.part.15
                        compact_zone_order
                        try_to_compact_pages
                        __alloc_pages_direct_compact
                        __alloc_pages_nodemask
                        alloc_pages_vma
                        do_huge_pmd_anonymous_page
                        do_page_fault
                        page_fault
                        memset

     0.00%          iozone  [kernel.kallsyms]           [k] prop_norm_percpu
                    |
                    --- prop_norm_percpu
                        prop_fraction_percpu
                        bdi_dirty_limit
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] prop_fraction_single
                    |
                    --- prop_fraction_single
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] add_disk_randomness
                    |
                    --- add_disk_randomness
                        blk_update_bidi_request
                        blk_end_bidi_request
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                        copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] scsi_handle_queue_ramp_up
                    |
                    --- scsi_handle_queue_ramp_up
                        scsi_decide_disposition
                        scsi_softirq_done
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                        copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] __scsi_release_buffers
                    |
                    --- __scsi_release_buffers
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        do_IRQ
                        ret_from_intr
                        get_page_from_freelist
                        __alloc_pages_nodemask
                        alloc_pages_current
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] scsi_sg_free
                    |
                    --- scsi_sg_free
                        __sg_free_table
                        __scsi_release_buffers
                        scsi_io_completion
                        blk_done_softirq
                        __do_softirq
                        call_softirq
                        do_softirq
                        irq_exit
                        smp_apic_timer_interrupt
                        apic_timer_interrupt
                        copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] __mem_cgroup_target_update.isra.11
                    |
                    --- __mem_cgroup_target_update.isra.11
                        memcg_check_events.part.37
                        __mem_cgroup_commit_charge_lrucare
                        mem_cgroup_cache_charge
                        add_to_page_cache_locked
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] __schedule
                    |
                    --- __schedule
                        schedule_timeout
                        io_schedule_timeout
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] _raw_spin_unlock_bh
                    |
                    --- _raw_spin_unlock_bh
                        balance_dirty_pages.isra.15
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%          iozone  [kernel.kallsyms]           [k] _raw_spin_lock_irq
                    |
                    --- _raw_spin_lock_irq
                        add_to_page_cache_locked.part.29
                        add_to_page_cache_lru
                        grab_cache_page_write_begin
                        ext4_da_write_begin
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret
                        0xf77904be
                        __write_nocancel

     0.00%         haveged  [kernel.kallsyms]           [k] rcu_preempt_note_context_switch
                   |
                   --- rcu_preempt_note_context_switch
                       __schedule
                       schedule_hrtimeout_range_clock
                       poll_schedule_timeout
                       do_select
                       core_sys_select
                       sys_select
                       system_call_fastpath
                       0x7fbcc3a3bc13
                       __select

     0.00%         haveged  [kernel.kallsyms]           [k] fget_light
                   |
                   --- fget_light
                       do_select
                       core_sys_select
                       sys_select
                       system_call_fastpath
                       0x7fbcc3a3bc13
                       __select

     0.00%         haveged  [kernel.kallsyms]           [k] do_select
                   |
                   --- do_select
                       core_sys_select
                       sys_select
                       system_call_fastpath
                       0x7fbcc3a3bc13
                       __select

     0.00%         haveged  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                   |
                   --- _raw_spin_unlock_irq
                       finish_task_switch
                       thread_return
                       schedule_hrtimeout_range_clock
                       poll_schedule_timeout
                       do_select
                       core_sys_select
                       sys_select
                       system_call_fastpath
                       0x7fbcc3a3bc13
                       __select

     0.00%            gpg2  libc-2.14.1.so              [.] __init_cpu_features
               |
               --- __init_cpu_features
                   dl_main
                   _dl_sysdep_start

     0.00%            gpg2  libc-2.14.1.so              [.] _int_malloc
               |
               --- _int_malloc

     0.00%            gpg2  libc-2.14.1.so              [.] __strcasecmp_l_sse2
               |
               --- __strcasecmp_l_sse2

     0.00%            gpg2  ld-2.14.1.so                [.] _dl_map_object_from_fd
               |
               --- _dl_map_object_from_fd
                   _dl_map_object

     0.00%            gpg2  ld-2.14.1.so                [.] check_match.10801
                      |
                      --- check_match.10801
                          0x7fb4772662e8

     0.00%            gpg2  ld-2.14.1.so                [.] _dl_allocate_tls_init
               |
               --- _dl_allocate_tls_init
                   _dl_sysdep_start

     0.00%            gpg2  gpg2                        [.] 0x8aa07         
               |
               --- 0x7f84229e7a07

     0.00%            gpg2  [kernel.kallsyms]           [k] __rcu_read_unlock
               |
               --- __rcu_read_unlock
                   handle_mm_fault
                   do_page_fault
                   page_fault
                   0x7f5749c6c0c0
                   0x7f5749c6c0c0
                   dl_main
                   _dl_sysdep_start

     0.00%            gpg2  [kernel.kallsyms]           [k] unmap_page_range
               |
               --- unmap_page_range
                   unmap_vmas
                   exit_mmap
                   mmput.part.18
                   exec_mmap
                   flush_old_exec
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7fd26a96d0f7
                   __execve

     0.00%            gpg2  [kernel.kallsyms]           [k] unmap_vmas
               |
               --- unmap_vmas
                   exit_mmap
                   mmput.part.18
                   exec_mmap
                   flush_old_exec
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7fd26a96d0f7
                   __execve

     0.00%            gpg2  [kernel.kallsyms]           [k] find_vma
               |
               --- find_vma
                   do_page_fault
                   page_fault
                   0x7fd26a99c61b
                   __tsearch
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   (nil)

     0.00%            gpg2  [kernel.kallsyms]           [k] change_pte_range
               |
               --- change_pte_range
                   change_protection
                   mprotect_fixup
                   sys_mprotect
                   system_call_fastpath
                   0x7f6fa62f4877
                   mprotect

     0.00%            gpg2  [kernel.kallsyms]           [k] page_add_new_anon_rmap
               |
               --- page_add_new_anon_rmap
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd26ac5b4aa
                   __reclaim_stacks
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()

     0.00%            gpg2  [kernel.kallsyms]           [k] policy_zonelist
               |
               --- policy_zonelist
                   alloc_pages_vma
                   do_anonymous_page.isra.39
                   __get_user_pages
                   __mlock_vma_pages_range.isra.4
                   do_mlock_pages
                   sys_mlock
                   system_call_fastpath
                   0x7f1505428427
                   mlock

     0.00%            gpg2  [kernel.kallsyms]           [k] kmem_cache_alloc_trace
               |
               --- kmem_cache_alloc_trace
                   perf_event_mmap_event
                   perf_event_mmap
                   mmap_region
                   sys_mmap_pgoff
                   system_call_fastpath
                   0x7f07fd66781a
                   mmap64

     0.00%            gpg2  [kernel.kallsyms]           [k] __mem_cgroup_uncharge_common
               |
               --- __mem_cgroup_uncharge_common
                   page_remove_rmap
                   zap_pte_range
                   unmap_page_range
                   unmap_vmas
                   exit_mmap
                   mmput.part.18
                   exit_mm
                   do_exit
                   do_group_exit
                   sys_exit_group
                   system_call_fastpath
                   0x7f6fa50de0d8

     0.00%            gpg2  [kernel.kallsyms]           [k] sys_close
               |
               --- sys_close
                   system_call_fastpath
                   0x7fd26ac62e2d
                   __libc_close
                   0x7fd2670d4e18
                   std::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_stringstream()

     0.00%            gpg2  [kernel.kallsyms]           [k] __d_lookup_rcu
                      |
                      --- __d_lookup_rcu
                          do_lookup
                          link_path_walk
                          path_lookupat
                          do_path_lookup
                          user_path_at
                          sys_faccessat
                          system_call_fastpath
                          0x7f2a3270c657
                          __GI___access

     0.00%            gpg2  [kernel.kallsyms]           [k] vfsmount_lock_local_lock
               |
               --- vfsmount_lock_local_lock
                   mntput_no_expire
                   path_openat
                   do_filp_open
                   do_sys_open
                   system_call_fastpath
                   0x7fd631801647
                   open64

     0.00%            gpg2  [kernel.kallsyms]           [k] ext4_update_dx_flag
               |
               --- ext4_update_dx_flag
                   ext4_unlink
                   vfs_unlink.part.28
                   do_unlinkat
                   system_call_fastpath
                   0x7f7e8be6e957
                   __GI___unlink

     0.00%            gpg2  [kernel.kallsyms]           [k] cap_capable
               |
               --- cap_capable
                   cap_vm_enough_memory
                   mmap_region
                   sys_mmap_pgoff
                   system_call_fastpath
                   0x7f28f144b81a
                   mmap64

     0.00%            gpg2  [kernel.kallsyms]           [k] apparmor_dentry_open
                      |
                      --- apparmor_dentry_open
                          security_dentry_open
                          __dentry_open
                          do_last
                          path_openat
                          do_filp_open
                          do_sys_open
                          system_call_fastpath
                          0x7f2a338ff647
                          open64

     0.00%            gpg2  [kernel.kallsyms]           [k] __blk_recalc_rq_segments
               |
               --- __blk_recalc_rq_segments
                   blk_recount_segments
                   bio_phys_segments
                   blk_rq_bio_prep
                   __make_request
                   generic_make_request.part.52
                   submit_bio
                   mpage_readpages
                   read_pages
                   __do_page_cache_readahead
                   ra_submit
                   filemap_fault
                   __do_fault
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7f1506611a33
                   memset
                   _dl_map_object

     0.00%            gpg2  [kernel.kallsyms]           [k] prio_tree_remove
               |
               --- prio_tree_remove
                   unlink_file_vma
                   free_pgtables
                   unmap_region
                   do_munmap
                   mmap_region
                   sys_mmap_pgoff
                   system_call_fastpath
                   0x7ffb82bdc81a
                   mmap64

     0.00%            gpg2  [kernel.kallsyms]           [k] strlen
               |
               --- strlen
                   find_in_table
                   proc_sys_lookup
                   d_alloc_and_lookup
                   do_lookup
                   link_path_walk
                   path_openat
                   do_filp_open
                   do_sys_open
                   system_call_fastpath
                   0x7ffb819e9220
                   __GI___libc_open

     0.00%            gpg2  [kernel.kallsyms]           [k] memset
               |
               --- memset
                   kmem_cache_alloc_trace
                   perf_event_mmap_event
                   perf_event_mmap
                   mprotect_fixup
                   sys_mprotect
                   system_call_fastpath
                   0x7f92204d9877
                   mprotect

     0.00%            gpg2  [kernel.kallsyms]           [k] mix_pool_bytes_extract
                      |
                      --- mix_pool_bytes_extract
                          extract_buf
                          extract_entropy
                          xfer_secondary_pool.part.4
                          extract_entropy
                          create_elf_tables
                          load_elf_binary
                          search_binary_handler
                          do_execve_common.isra.27
                          sys_execve
                          stub_execve
                          0x7fd26a96d0f7
                          0x7fd26a96d0f7

     0.00%            gpg2  [kernel.kallsyms]           [k] mutex_lock
               |
               --- mutex_lock
                   unlink_anon_vmas
                   free_pgtables
                   exit_mmap
                   mmput.part.18
                   exec_mmap
                   flush_old_exec
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7fd26a96d0f7
                   __execve

     0.00%            gpg2  [kernel.kallsyms]           [k] _raw_spin_unlock
               |
               --- _raw_spin_unlock
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd26a99c6bc
                   __tsearch

     0.00%            gpg2  [kernel.kallsyms]           [k] system_call_after_swapgs
               |
               --- system_call_after_swapgs
                   0x7fd26ac62e2d
                   __libc_close

     0.00%             gpg  libc-2.14.1.so              [.] __setenv
               |
               --- __setenv

     0.00%             gpg  libc-2.14.1.so              [.] __strlen_sse2
               |
               --- __strlen_sse2
                   0x7fa531fc4aa5

     0.00%             gpg  libc-2.14.1.so              [.] __memset_x86_64
               |
               --- __memset_x86_64

     0.00%             gpg  libc-2.14.1.so              [.] __vfprintf_chk
               |
               --- __vfprintf_chk

     0.00%             gpg  ld-2.14.1.so                [.] check_match.10801
               |
               --- check_match.10801
                   0x7fea2d04bc00

     0.00%             gpg  ld-2.14.1.so                [.] call_init
               |
               --- call_init
                   0x7fff8859fed0
                   0x616665642d6f6e2d

     0.00%             gpg  ld-2.14.1.so                [.] _dl_name_match_p
               |
               --- _dl_name_match_p

     0.00%             gpg  [kernel.kallsyms]           [k] sys_mmap
               |
               --- sys_mmap
                   system_call_fastpath
                   0x7f511bb912aa
                   __GI___mmap64

     0.00%             gpg  [kernel.kallsyms]           [k] ___pmd_free_tlb
                       |
                       --- ___pmd_free_tlb
                           free_pgd_range
                           shift_arg_pages
                           setup_arg_pages
                           load_elf_binary
                           search_binary_handler
                           do_execve_common.isra.27
                           sys_execve
                           stub_execve
                           0x7fd26a96d0f7
                           0x7fd26a96d0f7

     0.00%             gpg  [kernel.kallsyms]           [k] __wake_up_bit
               |
               --- __wake_up_bit
                   __do_fault
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7ff7217f9050
                   _dl_vdso_vsym
                   dl_main
                   _dl_sysdep_start

     0.00%             gpg  [kernel.kallsyms]           [k] page_waitqueue
               |
               --- page_waitqueue
                   unlock_page
                   __do_fault
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7f39b80653d0
                   __cxa_finalize at plt
                   0x7f39b808770d
                   __run_exit_handlers

     0.00%             gpg  [kernel.kallsyms]           [k] iov_iter_fault_in_readable
               |
               --- iov_iter_fault_in_readable
                   generic_perform_write
                   generic_file_buffered_write
                   __generic_file_aio_write
                   generic_file_aio_write
                   ext4_file_write
                   do_sync_write
                   vfs_write
                   sys_write
                   system_call_fastpath
                   0x7f78f82e4600
                   __write_nocancel
                   (nil)

     0.00%             gpg  [kernel.kallsyms]           [k] vma_prio_tree_insert
               |
               --- vma_prio_tree_insert
                   vma_adjust
                   __split_vma
                   do_munmap
                   mmap_region
                   sys_mmap_pgoff
                   system_call_fastpath
                   0x7fcfe9d3d81a
                   mmap64

     0.00%             gpg  [kernel.kallsyms]           [k] vma_prio_tree_remove
               |
               --- vma_prio_tree_remove
                   unlink_file_vma
                   free_pgtables
                   exit_mmap
                   mmput.part.18
                   exit_mm
                   do_exit
                   do_group_exit
                   sys_exit_group
                   system_call_fastpath
                   0x7f5b26ac20d8

     0.00%             gpg  [kernel.kallsyms]           [k] zap_pte_range
               |
               --- zap_pte_range
                   unmap_page_range
                   unmap_vmas
                   exit_mmap
                   mmput.part.18
                   exit_mm
                   do_exit
                   do_group_exit
                   sys_exit_group
                   system_call_fastpath
                   0x7f7563cb90d8

     0.00%             gpg  [kernel.kallsyms]           [k] vma_adjust
                       |
                       --- vma_adjust
                           shift_arg_pages
                           setup_arg_pages
                           load_elf_binary
                           search_binary_handler
                           do_execve_common.isra.27
                           sys_execve
                           stub_execve
                           0x7fd26a96d0f7
                           0x7fd26a96d0f7

     0.00%             gpg  [kernel.kallsyms]           [k] kmem_cache_alloc
               |
               --- kmem_cache_alloc
                   getname_flags
                   do_sys_open
                   system_call_fastpath
                   0x7f15ba8ea647
                   open64

     0.00%             gpg  [kernel.kallsyms]           [k] __mem_cgroup_uncharge_common
               |
               --- __mem_cgroup_uncharge_common
                   page_remove_rmap
                   zap_pte_range
                   unmap_page_range
                   unmap_vmas
                   exit_mmap
                   mmput.part.18
                   exit_mm
                   do_exit
                   do_group_exit
                   sys_exit_group
                   system_call_fastpath
                   0x7fa530b2b0d8

     0.00%             gpg  [kernel.kallsyms]           [k] __d_lookup
               |
               --- __d_lookup
                   do_lookup
                   do_last
                   path_openat
                   do_filp_open
                   do_sys_open
                   system_call_fastpath
                   0x7f78f94d7647
                   open64

     0.00%             gpg  [kernel.kallsyms]           [k] mntput_no_expire
               |
               --- mntput_no_expire
                   d_path
                   perf_event_mmap_event
                   perf_event_mmap
                   mprotect_fixup
                   sys_mprotect
                   system_call_fastpath
                   0x7f7564ecf877
                   mprotect

     0.00%             gpg  [kernel.kallsyms]           [k] ext4_file_mmap
               |
               --- ext4_file_mmap
                   mmap_region
                   sys_mmap_pgoff
                   system_call_fastpath
                   0x7f511cd7981a
                   mmap64

     0.00%             gpg  [kernel.kallsyms]           [k] apparmor_file_alloc_security
                       |
                       --- apparmor_file_alloc_security
                           get_empty_filp
                           path_openat
                           do_filp_open
                           do_sys_open
                           system_call_fastpath
                           0x7fbd6eb3d220
                           __GI___libc_open
                           0x7fff19d85ed0
                           0x616665642d6f6e2d

     0.00%             gpg  [kernel.kallsyms]           [k] apparmor_file_permission
               |
               --- apparmor_file_permission
                   security_file_permission
                   rw_verify_area
                   vfs_read
                   kernel_read
                   load_elf_interp
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7fd26a96d0f7
                   0x7fd26a96d0f7

     0.00%             gpg  [kernel.kallsyms]           [k] __strncpy_from_user
               |
               --- __strncpy_from_user
                   do_getname
                   getname_flags
                   do_sys_open
                   system_call_fastpath
                   0x7fd26ac6358d
                   0x7fd26ac6358d
                   0x7fd26751b7c9

     0.00%             gpg  [kernel.kallsyms]           [k] sha_transform
               |
               --- sha_transform
                   extract_buf
                   extract_entropy
                   xfer_secondary_pool.part.4
                   extract_entropy
                   create_elf_tables
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7fd26a96d0f7
                   0x7fd26a96d0f7

     0.00%             gpg  [kernel.kallsyms]           [k] _raw_spin_lock
               |
               --- _raw_spin_lock
                   __khugepaged_exit
                   mmput.part.18
                   exec_mmap
                   flush_old_exec
                   load_elf_binary
                   search_binary_handler
                   do_execve_common.isra.27
                   sys_execve
                   stub_execve
                   0x7fd26a96d0f7
                   __execve

     0.00%             gpg  [kernel.kallsyms]           [k] _raw_spin_unlock
               |
               --- _raw_spin_unlock
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7fd26a96d044
                   __libc_fork
                   zypp::ExternalProgram::start_program(char const* const*, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, zypp::ExternalProgram::Stderr_Disposition, int, bool, char const*)
                   0x2
                   std::ctype<char>::~ctype()

     0.00%             gpg  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
               |
               --- _raw_spin_unlock_irq
                   finish_task_switch
                   thread_return
                   preempt_schedule
                   pipe_write
                   do_sync_write
                   vfs_write
                   sys_write
                   system_call_fastpath
                   0x7f15b96f7600
                   __write_nocancel

     0.00%             gpg  [kernel.kallsyms]           [k] do_page_fault
               |
               --- do_page_fault
                   page_fault
                   0x7f8082255864
                   _dl_setup_hash
                   _dl_map_object

     0.00%       flush-8:0  [kernel.kallsyms]           [k] native_read_tsc
                 |
                 --- native_read_tsc
                     pvclock_clocksource_read
                     kvm_clock_read
                     sched_clock
                     blk_rq_init
                     get_request
                     get_request_wait
                     __make_request
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_check_old_data_flush
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] kvm_clock_read
                 |
                 --- kvm_clock_read
                     sched_clock
                     blk_rq_init
                     get_request
                     get_request_wait
                     __make_request
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] kthread_should_stop
                 |
                 --- kthread_should_stop
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] up_write
                 |
                 --- up_write
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __call_rcu
                 |
                 --- __call_rcu
                     ext4_mb_put_pa.isra.30
                     ext4_mb_release_context
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] unlock_page
                 |
                 --- unlock_page
                     ext4_num_dirty_pages.isra.35
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] end_page_writeback
                 |
                 --- end_page_writeback
                     put_io_page
                     ext4_end_bio
                     blk_update_request
                     blk_update_bidi_request
                     blk_end_bidi_request
                     scsi_io_completion
                     blk_done_softirq
                     __do_softirq
                     call_softirq
                     do_softirq
                     irq_exit
                     do_IRQ
                     ret_from_intr
                     find_get_pages_tag
                     pagevec_lookup_tag
                     ext4_num_dirty_pages.isra.35
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] find_get_page
                 |
                 --- find_get_page
                     __find_get_block_slow.isra.19
                     unmap_underlying_metadata
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] mempool_alloc
                 |
                 --- mempool_alloc
                     get_request
                     get_request_wait
                     __make_request
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] mapping_tagged
                 |
                 --- mapping_tagged
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] drain_cpu_pagevecs
                 |
                 --- drain_cpu_pagevecs
                     lru_add_drain
                     __pagevec_release
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] lru_add_drain
                 |
                 --- lru_add_drain
                     __pagevec_release
                     ext4_num_dirty_pages.isra.35
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] blk_queue_bounce
                 |
                 --- blk_queue_bounce
                     __make_request
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] kmem_cache_free
                 |
                 --- kmem_cache_free
                     bio_free
                     ext4_end_bio
                     blk_update_request
                     blk_update_bidi_request
                     blk_end_bidi_request
                     scsi_io_completion
                     blk_done_softirq
                     __do_softirq
                     call_softirq
                     do_softirq
                     irq_exit
                     do_IRQ
                     ret_from_intr
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] mem_cgroup_charge_statistics.isra.28
                 |
                 --- mem_cgroup_charge_statistics.isra.28
                     __mem_cgroup_commit_charge
                     __mem_cgroup_commit_charge_lrucare
                     mem_cgroup_cache_charge
                     add_to_page_cache_locked
                     add_to_page_cache_lru
                     find_or_create_page
                     grow_dev_page
                     __getblk_slow
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] grab_super_passive
                 |
                 --- grab_super_passive
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] move_expired_inodes
                 |
                 --- move_expired_inodes
                     queue_io
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] bdi_writeback_thread
                 |
                 --- bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] mark_buffer_dirty
                 |
                 --- mark_buffer_dirty
                     __ext4_handle_dirty_metadata
                     ext4_mb_mark_diskspace_used
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_check_old_data_flush
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] unmap_underlying_metadata
                 |
                 --- unmap_underlying_metadata
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __getblk
                 |
                 --- __getblk
                     ext4_get_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] block_write_full_page_endio
                 |
                 --- block_write_full_page_endio
                     __writepage
                     write_cache_pages
                     generic_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] bio_add_page
                 |
                 --- bio_add_page
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] bio_alloc
                 |
                 --- bio_alloc
                     io_submit_init.isra.4
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_check_old_data_flush
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] inode_reserved_space
                 |
                 --- inode_reserved_space
                     inode_claim_rsv_space
                     dquot_claim_space_nodirty
                     ext4_da_update_reserve_space
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] inode_claim_rsv_space
                 |
                 --- inode_claim_rsv_space
                     dquot_claim_space_nodirty
                     ext4_da_update_reserve_space
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_get_group_desc
                 |
                 --- ext4_get_group_desc
                     ext4_read_block_bitmap
                     ext4_mb_mark_diskspace_used
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_map_blocks
                 |
                 --- ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_do_update_inode
                 |
                 --- ext4_do_update_inode
                     ext4_mark_iloc_dirty
                     ext4_mark_inode_dirty
                     ext4_dirty_inode
                     __mark_inode_dirty
                     ext4_da_update_reserve_space
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_mark_inode_dirty
                 |
                 --- ext4_mark_inode_dirty
                     ext4_dirty_inode
                     __mark_inode_dirty
                     ext4_da_update_reserve_space
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] io_submit_init.isra.4
                 |
                 --- io_submit_init.isra.4
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __ext4_journal_stop
                 |
                 --- __ext4_journal_stop
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __ext4_journal_get_write_access
                 |
                 --- __ext4_journal_get_write_access
                     ext4_mb_mark_diskspace_used
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __ext4_journal_get_create_access
                 |
                 --- __ext4_journal_get_create_access
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __ext4_handle_dirty_metadata
                 |
                 --- __ext4_handle_dirty_metadata
                     ext4_mb_mark_diskspace_used
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_mb_initialize_context
                 |
                 --- ext4_mb_initialize_context
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] mb_find_order_for_block
                 |
                 --- mb_find_order_for_block
                     mb_find_extent.constprop.33
                     ext4_mb_complex_scan_group
                     ext4_mb_regular_allocator
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_mb_put_pa.isra.30
                 |
                 --- ext4_mb_put_pa.isra.30
                     ext4_mb_release_context
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_check_old_data_flush
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] mb_mark_used
                 |
                 --- mb_mark_used
                     ext4_mb_use_best_found
                     ext4_mb_complex_scan_group
                     ext4_mb_regular_allocator
                     ext4_mb_new_blocks
                     ext4_new_meta_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_mb_use_best_found
                 |
                 --- ext4_mb_use_best_found
                     ext4_mb_complex_scan_group
                     ext4_mb_regular_allocator
                     ext4_mb_new_blocks
                     ext4_new_meta_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_mb_measure_extent
                 |
                 --- ext4_mb_measure_extent
                     ext4_mb_complex_scan_group
                     ext4_mb_regular_allocator
                     ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_mb_new_blocks
                 |
                 --- ext4_mb_new_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ext4_splice_branch.isra.10
                 |
                 --- ext4_splice_branch.isra.10
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] elv_set_request
                 |
                 --- elv_set_request
                     get_request
                     get_request_wait
                     __make_request
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] generic_make_request.part.52
                 |
                 --- generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __make_request
                 |
                 --- __make_request
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     io_submit_add_bh
                     ext4_bio_write_page
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] blkiocg_update_dispatch_stats
                 |
                 --- blkiocg_update_dispatch_stats
                     blk_throtl_bio
                     generic_make_request.part.52
                     submit_bio
                     ext4_io_submit
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] cfq_cic_lookup
                 |
                 --- cfq_cic_lookup
                     cfq_allow_merge
                     elv_rq_merge_ok
                     elv_try_merge
                     attempt_plug_merge
                     __make_request
                     generic_make_request.part.52
                     submit_bio
                     submit_bh
                     __block_write_full_page
                     __writepage
                     write_cache_pages
                     generic_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] radix_tree_gang_lookup_tag_slot
                 |
                 --- radix_tree_gang_lookup_tag_slot
                     find_get_pages_tag
                     pagevec_lookup_tag
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] __percpu_counter_add
                 |
                 --- __percpu_counter_add
                     ext4_mb_mark_diskspace_used
                     ext4_mb_new_blocks
                     ext4_new_meta_blocks
                     ext4_alloc_blocks
                     ext4_alloc_branch
                     ext4_ind_map_blocks
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] ata_scsi_queuecmd
                 |
                 --- ata_scsi_queuecmd
                     scsi_dispatch_cmd
                     scsi_request_fn
                     blk_run_queue
                     scsi_run_queue
                     scsi_next_command
                     scsi_io_completion
                     blk_done_softirq
                     __do_softirq
                     call_softirq
                     do_softirq
                     irq_exit
                     do_IRQ
                     ret_from_intr
                     mpage_da_submit_io
                     mpage_da_map_and_submit
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_check_old_data_flush
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] preempt_schedule_irq
                 |
                 --- preempt_schedule_irq
                     retint_kernel
                     find_get_pages_tag
                     pagevec_lookup_tag
                     ext4_num_dirty_pages.isra.35
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_check_old_data_flush
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] down_read
                 |
                 --- down_read
                     ext4_map_blocks
                     mpage_da_map_and_submit
                     write_cache_pages_da
                     ext4_da_writepages
                     writeback_single_inode
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%       flush-8:0  [kernel.kallsyms]           [k] _raw_spin_lock
                 |
                 --- _raw_spin_lock
                     writeback_sb_inodes
                     __writeback_inodes_wb
                     wb_writeback
                     wb_do_writeback
                     bdi_writeback_thread
                     kthread
                     kernel_thread_helper

     0.00%     firefox-bin  libxul.so                   [.] 0xebd63e        
               |
               --- 0x7fb2ed41f63e

     0.00%     firefox-bin  libX11.so.6.3.0             [.] _XSend
               |
               --- _XSend
                   0x7fffd0961b4c

     0.00%     firefox-bin  [kernel.kallsyms]           [k] kmem_cache_alloc_node_trace
               |
               --- kmem_cache_alloc_node_trace
                   __alloc_skb
                   sock_alloc_send_pskb
                   unix_stream_sendmsg
                   do_sock_write.isra.12
                   sock_aio_write
                   do_sync_readv_writev
                   do_readv_writev
                   sys_writev
                   system_call_fastpath
                   0x7fb2eef051b2
                   __libc_writev

     0.00%     dbus-daemon  libc-2.14.1.so              [.] _int_free
               |
               --- _int_free

     0.00%     dbus-daemon  libc-2.14.1.so              [.] _int_realloc
               |
               --- _int_realloc

     0.00%     dbus-daemon  [kernel.kallsyms]           [k] flush_tlb_page
               |
               --- flush_tlb_page
                   ptep_clear_flush
                   do_wp_page
                   handle_pte_fault
                   do_page_fault
                   page_fault
                   0x7f249a075f7a
                   __libc_fork

     0.00%     dbus-daemon  [kernel.kallsyms]           [k] __kmalloc
               |
               --- __kmalloc
                   do_sys_poll
                   sys_poll
                   system_call_fastpath
                   0x7f249a09e3e8
                   __poll

     0.00%     dbus-daemon  [kernel.kallsyms]           [k] mem_cgroup_count_vm_event
               |
               --- mem_cgroup_count_vm_event
                   handle_mm_fault
                   do_page_fault
                   page_fault
                   0x7f249a0440cf
                   _int_malloc

     0.00%     dbus-daemon  [kernel.kallsyms]           [k] fget_light
               |
               --- fget_light
                   do_poll.isra.4
                   do_sys_poll
                   sys_poll
                   system_call_fastpath
                   0x7f249a09e3e8
                   __poll

     0.00%    avahi-daemon  libc-2.14.1.so              [.] _int_free
              |
              --- _int_free

     0.00%  apper-sentinel  libc-2.14.1.so              [.] _int_malloc
            |
            --- _int_malloc

     0.00%  apper-sentinel  libc-2.14.1.so              [.] free
            |
            --- free

     0.00%  apper-sentinel  libc-2.14.1.so              [.] __GI___access
            |
            --- __GI___access

     0.00%  apper-sentinel  libc-2.14.1.so              [.] pthread_mutex_unlock
            |
            --- pthread_mutex_unlock

     0.00%  apper-sentinel  libQtCore.so.4.7.4          [.] QString::startsWith(QChar const&, Qt::CaseSensitivity) const
            |
            --- QString::startsWith(QChar const&, Qt::CaseSensitivity) const

     0.00%  apper-sentinel  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
            |
            --- _raw_spin_unlock_irq
                finish_task_switch
                thread_return
                schedule_hrtimeout_range_clock
                poll_schedule_timeout
                do_poll.isra.4
                do_sys_poll
                sys_poll
                system_call_fastpath
                0x7fa296add3e8
                __poll

     0.00%            Xorg  [kernel.kallsyms]           [k] rw_verify_area
                      |
                      --- rw_verify_area
                          vfs_read
                          sys_read
                          system_call_fastpath
                          0x7fa675514db0
                          __libc_read

     0.00%            Xorg  [kernel.kallsyms]           [k] do_select
                      |
                      --- do_select
                          core_sys_select
                          sys_select
                          system_call_fastpath
                          0x7fa67452ec13
                          __select
                          0x7eb340

     0.00%            Xorg  [kernel.kallsyms]           [k] unix_poll
                      |
                      --- unix_poll
                          do_select
                          core_sys_select
                          sys_select
                          system_call_fastpath
                          0x7fa67452ec13
                          __select

     0.00%            Xorg  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                      |
                      --- _raw_spin_unlock_irqrestore
                          test_clear_page_writeback
                          end_page_writeback
                          put_io_page
                          ext4_end_bio
                          blk_update_request
                          blk_update_bidi_request
                          blk_end_bidi_request
                          scsi_io_completion
                          blk_done_softirq
                          __do_softirq
                          call_softirq
                          do_softirq
                          irq_exit
                          do_IRQ
                          ret_from_intr
                          unix_poll
                          do_select
                          core_sys_select
                          sys_select
                          system_call_fastpath
                          0x7fa67452ec13
                          __select

     0.00%            Xorg  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                      |
                      --- _raw_spin_unlock_irq
                          start_flush_work
                          flush_work
                          n_tty_poll
                          tty_poll
                          do_select
                          core_sys_select
                          sys_select
                          system_call_fastpath
                          0x7fa67452ec13
                          __select

     0.00%            Xorg  Xorg                        [.] GetTimeInMillis
                      |
                      --- GetTimeInMillis
                          0x60



#
# (For a higher level overview, try: perf report --sort comm,dso)
## Events: 62K cpu-clock
#
# Overhead         Command               Shared Object                                                                                                                          Symbol
# ........  ..............  ..........................  ..............................................................................................................................
#
    79.23%         swapper  [kernel.kallsyms]           [k] native_safe_halt
                   |
                   --- native_safe_halt
                       default_idle
                       cpu_idle
                       start_kernel
                       x86_64_start_kernel

     4.99%          iozone  [kernel.kallsyms]           [k] copy_user_generic_unrolled
                    |
                    --- copy_user_generic_unrolled
                        iov_iter_copy_from_user_atomic
                        generic_perform_write
                        generic_file_buffered_write
                        __generic_file_aio_write
                        generic_file_aio_write
                        ext4_file_write
                        do_sync_write
                        vfs_write
                        sys_write
                        ia32_sysret	
                        0xf77904be
                        __write_nocancel

     2.58%         swapper  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                   |
                   --- _raw_spin_unlock_irqrestore
                      |          
                      |--73.33%-- ata_scsi_queuecmd
                      |          scsi_dispatch_cmd
                      |          scsi_request_fn
                      |          |          
                      |          |--99.83%-- blk_run_queue
                      |          |          scsi_run_queue
                      |          |          scsi_next_command
                      |          |          scsi_io_completion
                      |          |          blk_done_softirq
                      |          |          __do_softirq
                      |          |          call_softirq
                      |          |          do_softirq
                      |          |          irq_exit
                      |          |          |          
                      |          |          |--96.37%-- do_IRQ
                      |          |          |          ret_from_intr
                      |          |          |          |          
                      |          |          |          |--99.65%-- native_safe_halt
                      |          |          |          |          default_idle
                      |          |          |          |          cpu_idle
                      |          |          |          |          start_kernel
                      |          |          |          |          x86_64_start_kernel
                      |          |          |           --0.35%-- [...]
                      |          |          |          
                      |          |           --3.63%-- smp_apic_timer_interrupt
                      |          |                     apic_timer_interrupt
                      |          |                     native_safe_halt
                      |          |                     default_idle
                      |          |                     cpu_idle
                      |          |                     start_kernel
                      |          |                     x86_64_start_kernel
                      |           --0.17%-- [...]
                      |          
                      |--15.62%-- try_to_wake_up
                      |          call_timer_fn
                      |          run_timer_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--99.21%-- smp_apic_timer_interrupt
                      |          |          apic_timer_interrupt
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --0.79%-- do_IRQ
                      |                     ret_from_intr
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--6.73%-- test_clear_page_writeback
                      |          end_page_writeback
                      |          put_io_page
                      |          ext4_end_bio
                      |          blk_update_request
                      |          blk_update_bidi_request
                      |          blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--87.16%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --12.84%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--1.36%-- blk_end_bidi_request
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--90.91%-- do_IRQ
                      |          |          ret_from_intr
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --9.09%-- smp_apic_timer_interrupt
                      |                     apic_timer_interrupt
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--1.23%-- __rcu_process_callbacks
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--95.00%-- smp_apic_timer_interrupt
                      |          |          apic_timer_interrupt
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |          |          
                      |           --5.00%-- do_IRQ
                      |                     ret_from_intr
                      |                     native_safe_halt
                      |                     default_idle
                      |                     cpu_idle
                      |                     start_kernel
                      |                     x86_64_start_kernel
                      |          
                      |--0.86%-- call_timer_fn
                      |          run_timer_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          smp_apic_timer_interrupt
                      |          apic_timer_interrupt
                      |          native_safe_halt
                      |          default_idle
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                       --0.86%-- [...]

     0.79%         swapper  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                   |
                   --- _raw_spin_unlock_irq
                      |          
                      |--60.81%-- run_timer_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          |          
                      |          |--99.67%-- smp_apic_timer_interrupt
                      |          |          apic_timer_interrupt
                      |          |          native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |           --0.33%-- [...]
                      |          
                      |--25.86%-- finish_task_switch
                      |          thread_return
                      |          cpu_idle
                      |          start_kernel
                      |          x86_64_start_kernel
                      |          
                       --13.33%-- scsi_request_fn
                                 blk_run_queue
                                 scsi_run_queue
                                 scsi_next_command
                                 scsi_io_completion
                                 blk_done_softirq
                                 __do_softirq
                                 call_softirq
                                 do_softirq
                                 irq_exit
                                 |          
                                 |--98.48%-- do_IRQ
                                 |          ret_from_intr
                                 |          native_safe_halt
                                 |          default_idle
                                 |          cpu_idle
                                 |          start_kernel
                                 |          x86_64_start_kernel
                                 |          
                                  --1.52%-- smp_apic_timer_interrupt
                                            apic_timer_interrupt
                                            native_safe_halt
                                            default_idle
                                            cpu_idle
                                            start_kernel
                                            x86_64_start_kernel

     0.77%         swapper  [kernel.kallsyms]           [k] __do_softirq
                   |
                   --- __do_softirq
                       call_softirq
                       do_softirq
                       irq_exit
                      |          
                      |--88.22%-- do_IRQ
                      |          ret_from_intr
                      |          |          
                      |          |--99.77%-- native_safe_halt
                      |          |          default_idle
                      |          |          cpu_idle
                      |          |          start_kernel
                      |          |          x86_64_start_kernel
                      |           --0.23%-- [...]
                      |          
                       --11.78%-- smp_apic_timer_interrupt
                                 apic_timer_interrupt
                                 native_safe_halt
                                 default_idle
                                 cpu_idle
                                 start_kernel
                                 x86_64_start_kernel

     0.58%          iozone  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                    |
                    --- _raw_spin_unlock_irqrestore
                       |          
                       |--61.31%-- ata_scsi_queuecmd
                       |          scsi_dispatch_cmd
                       |          scsi_request_fn
                       |          |          
                       |          |--98.67%-- blk_run_queue
                       |          |          scsi_run_queue
                       |          |          scsi_next_command
                       |          |          scsi_io_completion
                       |          |          blk_done_softirq
                       |          |          __do_softirq
                       |          |          call_softirq
                       |          |          do_softirq
                       |          |          irq_exit
                       |          |          |          
                       |          |          |--94.14%-- do_IRQ
                       |          |          |          ret_from_intr
                       |          |          |          |          
                       |          |          |          |--55.98%-- copy_user_generic_unrolled
                       |          |          |          |          iov_iter_copy_from_user_atomic
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--4.31%-- get_page_from_freelist
                       |          |          |          |          __alloc_pages_nodemask
                       |          |          |          |          alloc_pages_current
                       |          |          |          |          grab_cache_page_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--4.31%-- _raw_spin_unlock_irq
                       |          |          |          |          |          
                       |          |          |          |          |--55.56%-- __set_page_dirty
                       |          |          |          |          |          __block_commit_write.isra.22
                       |          |          |          |          |          block_write_end
                       |          |          |          |          |          generic_write_end
                       |          |          |          |          |          ext4_da_write_end
                       |          |          |          |          |          generic_perform_write
                       |          |          |          |          |          generic_file_buffered_write
                       |          |          |          |          |          __generic_file_aio_write
                       |          |          |          |          |          generic_file_aio_write
                       |          |          |          |          |          ext4_file_write
                       |          |          |          |          |          do_sync_write
                       |          |          |          |          |          vfs_write
                       |          |          |          |          |          sys_write
                       |          |          |          |          |          ia32_sysret
                       |          |          |          |          |          0xf77904be
                       |          |          |          |          |          __write_nocancel
                       |          |          |          |          |          
                       |          |          |          |           --44.44%-- add_to_page_cache_locked.part.29
                       |          |          |          |                     add_to_page_cache_lru
                       |          |          |          |                     grab_cache_page_write_begin
                       |          |          |          |                     ext4_da_write_begin
                       |          |          |          |                     generic_perform_write
                       |          |          |          |                     generic_file_buffered_write
                       |          |          |          |                     __generic_file_aio_write
                       |          |          |          |                     generic_file_aio_write
                       |          |          |          |                     ext4_file_write
                       |          |          |          |                     do_sync_write
                       |          |          |          |                     vfs_write
                       |          |          |          |                     sys_write
                       |          |          |          |                     ia32_sysret
                       |          |          |          |                     0xf77904be
                       |          |          |          |                     __write_nocancel
                       |          |          |          |          
                       |          |          |          |--3.83%-- iov_iter_fault_in_readable
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--2.39%-- __wake_up_bit
                       |          |          |          |          generic_write_end
                       |          |          |          |          ext4_da_write_end
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.91%-- __mem_cgroup_commit_charge
                       |          |          |          |          __mem_cgroup_commit_charge_lrucare
                       |          |          |          |          mem_cgroup_cache_charge
                       |          |          |          |          add_to_page_cache_locked
                       |          |          |          |          add_to_page_cache_lru
                       |          |          |          |          grab_cache_page_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.91%-- alloc_buffer_head
                       |          |          |          |          alloc_page_buffers
                       |          |          |          |          create_empty_buffers
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.91%-- lookup_bh_lru
                       |          |          |          |          __find_get_block
                       |          |          |          |          __getblk
                       |          |          |          |          |          
                       |          |          |          |          |--50.00%-- __ext4_get_inode_loc
                       |          |          |          |          |          ext4_reserve_inode_write
                       |          |          |          |          |          ext4_mark_inode_dirty
                       |          |          |          |          |          ext4_dirty_inode
                       |          |          |          |          |          __mark_inode_dirty
                       |          |          |          |          |          generic_write_end
                       |          |          |          |          |          ext4_da_write_end
                       |          |          |          |          |          generic_perform_write
                       |          |          |          |          |          generic_file_buffered_write
                       |          |          |          |          |          __generic_file_aio_write
                       |          |          |          |          |          generic_file_aio_write
                       |          |          |          |          |          ext4_file_write
                       |          |          |          |          |          do_sync_write
                       |          |          |          |          |          vfs_write
                       |          |          |          |          |          sys_write
                       |          |          |          |          |          ia32_sysret
                       |          |          |          |          |          0xf77904be
                       |          |          |          |          |          __write_nocancel
                       |          |          |          |          |          
                       |          |          |          |           --50.00%-- ext4_get_branch
                       |          |          |          |                     ext4_ind_map_blocks
                       |          |          |          |                     ext4_map_blocks
                       |          |          |          |                     ext4_da_get_block_prep
                       |          |          |          |                     __block_write_begin
                       |          |          |          |                     ext4_da_write_begin
                       |          |          |          |                     generic_perform_write
                       |          |          |          |                     generic_file_buffered_write
                       |          |          |          |                     __generic_file_aio_write
                       |          |          |          |                     generic_file_aio_write
                       |          |          |          |                     ext4_file_write
                       |          |          |          |                     do_sync_write
                       |          |          |          |                     vfs_write
                       |          |          |          |                     sys_write
                       |          |          |          |                     ia32_sysret
                       |          |          |          |                     0xf77904be
                       |          |          |          |                     __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.44%-- __mark_inode_dirty
                       |          |          |          |          __block_commit_write.isra.22
                       |          |          |          |          block_write_end
                       |          |          |          |          generic_write_end
                       |          |          |          |          ext4_da_write_end
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.44%-- kmem_cache_alloc
                       |          |          |          |          alloc_buffer_head
                       |          |          |          |          alloc_page_buffers
                       |          |          |          |          create_empty_buffers
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.44%-- __rcu_read_unlock
                       |          |          |          |          __mem_cgroup_try_charge
                       |          |          |          |          mem_cgroup_cache_charge
                       |          |          |          |          add_to_page_cache_locked
                       |          |          |          |          add_to_page_cache_lru
                       |          |          |          |          grab_cache_page_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--1.44%-- mark_buffer_dirty
                       |          |          |          |          |          
                       |          |          |          |          |--66.67%-- __ext4_handle_dirty_metadata
                       |          |          |          |          |          ext4_do_update_inode
                       |          |          |          |          |          ext4_mark_iloc_dirty
                       |          |          |          |          |          ext4_mark_inode_dirty
                       |          |          |          |          |          ext4_dirty_inode
                       |          |          |          |          |          __mark_inode_dirty
                       |          |          |          |          |          generic_write_end
                       |          |          |          |          |          ext4_da_write_end
                       |          |          |          |          |          generic_perform_write
                       |          |          |          |          |          generic_file_buffered_write
                       |          |          |          |          |          __generic_file_aio_write
                       |          |          |          |          |          generic_file_aio_write
                       |          |          |          |          |          ext4_file_write
                       |          |          |          |          |          do_sync_write
                       |          |          |          |          |          vfs_write
                       |          |          |          |          |          sys_write
                       |          |          |          |          |          ia32_sysret
                       |          |          |          |          |          0xf77904be
                       |          |          |          |          |          __write_nocancel
                       |          |          |          |          |          
                       |          |          |          |           --33.33%-- __block_commit_write.isra.22
                       |          |          |          |                     block_write_end
                       |          |          |          |                     generic_write_end
                       |          |          |          |                     ext4_da_write_end
                       |          |          |          |                     generic_perform_write
                       |          |          |          |                     generic_file_buffered_write
                       |          |          |          |                     __generic_file_aio_write
                       |          |          |          |                     generic_file_aio_write
                       |          |          |          |                     ext4_file_write
                       |          |          |          |                     do_sync_write
                       |          |          |          |                     vfs_write
                       |          |          |          |                     sys_write
                       |          |          |          |                     ia32_sysret
                       |          |          |          |                     0xf77904be
                       |          |          |          |                     __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- __ext4_get_inode_loc
                       |          |          |          |          ext4_reserve_inode_write
                       |          |          |          |          ext4_mark_inode_dirty
                       |          |          |          |          ext4_dirty_inode
                       |          |          |          |          __mark_inode_dirty
                       |          |          |          |          generic_write_end
                       |          |          |          |          ext4_da_write_end
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- ext4_da_reserve_space
                       |          |          |          |          ext4_da_get_block_prep
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- _raw_spin_unlock_irqrestore
                       |          |          |          |          pagevec_lru_move_fn
                       |          |          |          |          __lru_cache_add
                       |          |          |          |          add_to_page_cache_lru
                       |          |          |          |          grab_cache_page_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- ext4_get_branch
                       |          |          |          |          ext4_ind_map_blocks
                       |          |          |          |          ext4_map_blocks
                       |          |          |          |          ext4_da_get_block_prep
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |          |          
                       |          |          |          |--0.96%-- alloc_page_buffers
                       |          |          |          |          create_empty_buffers
                       |          |          |          |          __block_write_begin
                       |          |          |          |          ext4_da_write_begin
                       |          |          |          |          generic_perform_write
                       |          |          |          |          generic_file_buffered_write
                       |          |          |          |          __generic_file_aio_write
                       |          |          |          |          generic_file_aio_write
                       |          |          |          |          ext4_file_write
                       |          |          |          |          do_sync_write
                       |          |          |          |          vfs_write
                       |          |          |          |          sys_write
                       |          |          |          |          ia32_sysret
                       |          |          |          |          0xf77904be
                       |          |          |          |          __write_nocancel
                       |          |          |           --11.96%-- [...]
                       |          |          |          
                       |          |           --5.86%-- smp_apic_timer_interrupt
                       |          |                     apic_timer_interrupt
                       |          |                     |          
                       |          |                     |--53.85%-- copy_user_generic_unrolled
                       |          |                     |          iov_iter_copy_from_user_atomic
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- _raw_spin_unlock_irq
                       |          |                     |          __set_page_dirty
                       |          |                     |          __block_commit_write.isra.22
                       |          |                     |          block_write_end
                       |          |                     |          generic_write_end
                       |          |                     |          ext4_da_write_end
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- __mem_cgroup_try_charge
                       |          |                     |          mem_cgroup_cache_charge
                       |          |                     |          add_to_page_cache_locked
                       |          |                     |          add_to_page_cache_lru
                       |          |                     |          grab_cache_page_write_begin
                       |          |                     |          ext4_da_write_begin
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- __page_cache_alloc
                       |          |                     |          grab_cache_page_write_begin
                       |          |                     |          ext4_da_write_begin
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- ext4_dirty_inode
                       |          |                     |          __mark_inode_dirty
                       |          |                     |          generic_write_end
                       |          |                     |          ext4_da_write_end
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                     |--7.69%-- get_page_from_freelist
                       |          |                     |          __alloc_pages_nodemask
                       |          |                     |          alloc_pages_current
                       |          |                     |          grab_cache_page_write_begin
                       |          |                     |          ext4_da_write_begin
                       |          |                     |          generic_perform_write
                       |          |                     |          generic_file_buffered_write
                       |          |                     |          __generic_file_aio_write
                       |          |                     |          generic_file_aio_write
                       |          |                     |          ext4_file_write
                       |          |                     |          do_sync_write
                       |          |                     |          vfs_write
                       |          |                     |          sys_write
                       |          |                     |          ia32_sysret
                       |          |                     |          0xf77904be
                       |          |                     |          __write_nocancel
                       |          |                     |          
                       |          |                      --7.69%-- 0xf77904be
                       |          |                                __write_nocancel
                       |          |                                0x8057120
                       |          |                                0x805771a
                       |          |                                0x80928e6
                       |          |                                __libc_start_main
                       |          |          
                       |          |--0.89%-- blk_flush_plug_list
                       |          |          |          
                       |          |          |--50.00%-- blk_finish_plug
                       |          |          |          read_pages
                       |          |          |          __do_page_cache_readahead
                       |          |          |          ra_submit
                       |          |          |          filemap_fault
                       |          |          |          __do_fault
                       |          |          |          handle_pte_fault
                       |          |          |          do_page_fault
                       |          |          |          page_fault
                       |          |          |          0xf77c3595
                       |          |          |          _dl_map_object_from_fd
                       |          |          |          _dl_map_object
                       |          |          |          
                       |          |           --50.00%-- io_schedule
                       |          |                     sleep_on_buffer
                       |          |                     __wait_on_bit
                       |          |                     out_of_line_wait_on_bit
                       |          |                     bh_submit_read
                       |          |                     ext4_get_branch
                       |          |                     ext4_ind_map_blocks
                       |          |                     ext4_map_blocks
                       |          |                     _ext4_get_block
                       |          |                     do_mpage_readpage
                       |          |                     mpage_readpages
                       |          |                     read_pages
                       |          |                     __do_page_cache_readahead
                       |          |                     ra_submit
                       |          |                     filemap_fault
                       |          |                     __do_fault
                       |          |                     handle_pte_fault
                       |          |                     do_page_fault
                       |          |                     page_fault
                       |          |                     0xf778ae42
                       |          |                     __i686.get_pc_thunk.cx
                       |          |                     0x8057120
                       |          |                     0x805771a
                       |          |                     0x80928e6
                       |          |                     __libc_start_main
                       |           --0.44%-- [...]
                       |          
                       |--25.34%-- pagevec_lru_move_fn
                       |          __lru_cache_add
                       |          |          
                       |          |--98.92%-- add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --1.08%-- do_wp_page
                       |                     handle_pte_fault
                       |                     do_page_fault
                       |                     page_fault
                       |                     memset
                       |          
                       |--4.36%-- test_clear_page_writeback
                       |          end_page_writeback
                       |          put_io_page
                       |          ext4_end_bio
                       |          blk_update_request
                       |          blk_update_bidi_request
                       |          blk_end_bidi_request
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          do_IRQ
                       |          ret_from_intr
                       |          |          
                       |          |--62.50%-- copy_user_generic_unrolled
                       |          |          iov_iter_copy_from_user_atomic
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- _raw_spin_unlock_irq
                       |          |          add_to_page_cache_locked.part.29
                       |          |          add_to_page_cache_lru
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- ext4_do_update_inode
                       |          |          ext4_mark_iloc_dirty
                       |          |          ext4_mark_inode_dirty
                       |          |          ext4_dirty_inode
                       |          |          __mark_inode_dirty
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- ext4_block_to_path.isra.9
                       |          |          ext4_ind_map_blocks
                       |          |          ext4_map_blocks
                       |          |          ext4_da_get_block_prep
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- __block_commit_write.isra.22
                       |          |          block_write_end
                       |          |          generic_write_end
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--6.25%-- __ext4_journal_stop
                       |          |          ext4_da_write_end
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --6.25%-- alloc_pages_current
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                       |--1.63%-- blk_end_bidi_request
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          |          
                       |          |--83.33%-- do_IRQ
                       |          |          ret_from_intr
                       |          |          |          
                       |          |          |--40.00%-- ext4_da_get_block_prep
                       |          |          |          __block_write_begin
                       |          |          |          ext4_da_write_begin
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |          |--20.00%-- copy_user_generic_unrolled
                       |          |          |          iov_iter_copy_from_user_atomic
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |          |--20.00%-- iov_iter_fault_in_readable
                       |          |          |          generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |           --20.00%-- kmem_cache_alloc
                       |          |                     alloc_buffer_head
                       |          |                     alloc_page_buffers
                       |          |                     create_empty_buffers
                       |          |                     __block_write_begin
                       |          |                     ext4_da_write_begin
                       |          |                     generic_perform_write
                       |          |                     generic_file_buffered_write
                       |          |                     __generic_file_aio_write
                       |          |                     generic_file_aio_write
                       |          |                     ext4_file_write
                       |          |                     do_sync_write
                       |          |                     vfs_write
                       |          |                     sys_write
                       |          |                     ia32_sysret
                       |          |                     0xf77904be
                       |          |                     __write_nocancel
                       |          |          
                       |           --16.67%-- smp_apic_timer_interrupt
                       |                     apic_timer_interrupt
                       |                     radix_tree_lookup_element
                       |                     find_get_page
                       |                     find_lock_page
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                       |--1.36%-- isolate_freepages
                       |          compaction_alloc
                       |          unmap_and_move
                       |          migrate_pages
                       |          compact_zone.part.15
                       |          compact_zone_order
                       |          try_to_compact_pages
                       |          __alloc_pages_direct_compact
                       |          __alloc_pages_nodemask
                       |          alloc_pages_vma
                       |          do_huge_pmd_anonymous_page
                       |          do_page_fault
                       |          page_fault
                       |          memset
                       |          
                       |--1.36%-- __alloc_pages_nodemask
                       |          alloc_pages_current
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--1.36%-- try_to_del_timer_sync
                       |          del_timer_sync
                       |          schedule_timeout
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--1.09%-- schedule_timeout
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--0.82%-- delayacct_end
                       |          io_schedule_timeout
                       |          balance_dirty_pages.isra.15
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--0.54%-- test_set_page_writeback
                       |          ext4_bio_write_page
                       |          mpage_da_submit_io
                       |          mpage_da_map_and_submit
                       |          ext4_da_writepages
                       |          __filemap_fdatawrite_range
                       |          filemap_write_and_wait_range
                       |          ext4_sync_file
                       |          do_fsync
                       |          sys_fsync
                       |          ia32_sysret
                       |          __fsync_nocancel
                       |          0x8057120
                       |          0x805771a
                       |          0x80928e6
                       |          __libc_start_main
                        --0.82%-- [...]

     0.56%         kswapd0  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                   |
                   --- _raw_spin_unlock_irq
                      |          
                      |--64.00%-- shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--22.57%-- __remove_mapping
                      |          shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--9.43%-- finish_task_switch
                      |          thread_return
                      |          |          
                      |          |--48.48%-- preempt_schedule
                      |          |          |          
                      |          |          |--81.25%-- shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |           --18.75%-- try_to_free_buffers
                      |          |                     shrink_page_list
                      |          |                     shrink_inactive_list
                      |          |                     shrink_zone
                      |          |                     balance_pgdat
                      |          |                     kswapd
                      |          |                     kthread
                      |          |                     kernel_thread_helper
                      |          |          
                      |          |--39.39%-- preempt_schedule_irq
                      |          |          retint_kernel
                      |          |          |          
                      |          |          |--30.77%-- kmem_cache_free
                      |          |          |          free_buffer_head
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--15.38%-- shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--15.38%-- prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- _raw_spin_lock
                      |          |          |          put_super
                      |          |          |          prune_super
                      |          |          |          shrink_slab
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- get_scan_count
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- free_buffer_head
                      |          |          |          try_to_free_buffers
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |          |--7.69%-- page_check_references.isra.50
                      |          |          |          shrink_page_list
                      |          |          |          shrink_inactive_list
                      |          |          |          shrink_zone
                      |          |          |          balance_pgdat
                      |          |          |          kswapd
                      |          |          |          kthread
                      |          |          |          kernel_thread_helper
                      |          |          |          
                      |          |           --7.69%-- __mem_cgroup_uncharge_common
                      |          |                     __remove_mapping
                      |          |                     shrink_page_list
                      |          |                     shrink_inactive_list
                      |          |                     shrink_zone
                      |          |                     balance_pgdat
                      |          |                     kswapd
                      |          |                     kthread
                      |          |                     kernel_thread_helper
                      |          |          
                      |          |--9.09%-- schedule_timeout
                      |          |          kswapd_try_to_sleep
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --3.03%-- kswapd_try_to_sleep
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                      |--1.14%-- get_scan_count
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--0.86%-- __set_page_dirty_nobuffers.part.14
                      |          ext4_writepage
                      |          pageout
                      |          shrink_page_list
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                      |          
                      |--0.86%-- scsi_request_fn
                      |          blk_run_queue
                      |          scsi_run_queue
                      |          scsi_next_command
                      |          scsi_io_completion
                      |          blk_done_softirq
                      |          __do_softirq
                      |          call_softirq
                      |          do_softirq
                      |          irq_exit
                      |          do_IRQ
                      |          ret_from_intr
                      |          |          
                      |          |--33.33%-- _raw_spin_unlock_irq
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |          |--33.33%-- drop_buffers
                      |          |          try_to_free_buffers
                      |          |          shrink_page_list
                      |          |          shrink_inactive_list
                      |          |          shrink_zone
                      |          |          balance_pgdat
                      |          |          kswapd
                      |          |          kthread
                      |          |          kernel_thread_helper
                      |          |          
                      |           --33.33%-- free_hot_cold_page
                      |                     __pagevec_free
                      |                     free_page_list
                      |                     shrink_page_list
                      |                     shrink_inactive_list
                      |                     shrink_zone
                      |                     balance_pgdat
                      |                     kswapd
                      |                     kthread
                      |                     kernel_thread_helper
                      |          
                      |--0.57%-- putback_lru_pages
                      |          shrink_inactive_list
                      |          shrink_zone
                      |          balance_pgdat
                      |          kswapd
                      |          kthread
                      |          kernel_thread_helper
                       --0.57%-- [...]

     0.39%          iozone  [kernel.kallsyms]           [k] get_page_from_freelist
                    |
                    --- get_page_from_freelist
                       |          
                       |--98.36%-- __alloc_pages_nodemask
                       |          alloc_pages_current
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --1.64%-- __write_nocancel

     0.38%          iozone  [kernel.kallsyms]           [k] _raw_spin_unlock_irq
                    |
                    --- _raw_spin_unlock_irq
                       |          
                       |--46.44%-- __set_page_dirty
                       |          __block_commit_write.isra.22
                       |          block_write_end
                       |          generic_write_end
                       |          ext4_da_write_end
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--25.52%-- finish_task_switch
                       |          thread_return
                       |          |          
                       |          |--81.97%-- schedule_timeout
                       |          |          io_schedule_timeout
                       |          |          balance_dirty_pages.isra.15
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--11.48%-- preempt_schedule
                       |          |          |          
                       |          |          |--71.43%-- generic_perform_write
                       |          |          |          generic_file_buffered_write
                       |          |          |          __generic_file_aio_write
                       |          |          |          generic_file_aio_write
                       |          |          |          ext4_file_write
                       |          |          |          do_sync_write
                       |          |          |          vfs_write
                       |          |          |          sys_write
                       |          |          |          ia32_sysret
                       |          |          |          0xf77904be
                       |          |          |          __write_nocancel
                       |          |          |          
                       |          |           --28.57%-- __alloc_pages_nodemask
                       |          |                     alloc_pages_current
                       |          |                     grab_cache_page_write_begin
                       |          |                     ext4_da_write_begin
                       |          |                     generic_perform_write
                       |          |                     generic_file_buffered_write
                       |          |                     __generic_file_aio_write
                       |          |                     generic_file_aio_write
                       |          |                     ext4_file_write
                       |          |                     do_sync_write
                       |          |                     vfs_write
                       |          |                     sys_write
                       |          |                     ia32_sysret
                       |          |                     0xf77904be
                       |          |                     __write_nocancel
                       |          |          
                       |           --6.56%-- preempt_schedule_irq
                       |                     retint_kernel
                       |                     |          
                       |                     |--25.00%-- ext4_data_block_valid
                       |                     |          ext4_map_blocks
                       |                     |          ext4_da_get_block_prep
                       |                     |          __block_write_begin
                       |                     |          ext4_da_write_begin
                       |                     |          generic_perform_write
                       |                     |          generic_file_buffered_write
                       |                     |          __generic_file_aio_write
                       |                     |          generic_file_aio_write
                       |                     |          ext4_file_write
                       |                     |          do_sync_write
                       |                     |          vfs_write
                       |                     |          sys_write
                       |                     |          ia32_sysret
                       |                     |          0xf77904be
                       |                     |          __write_nocancel
                       |                     |          
                       |                     |--25.00%-- get_page_from_freelist
                       |                     |          __alloc_pages_nodemask
                       |                     |          alloc_pages_current
                       |                     |          grab_cache_page_write_begin
                       |                     |          ext4_da_write_begin
                       |                     |          generic_perform_write
                       |                     |          generic_file_buffered_write
                       |                     |          __generic_file_aio_write
                       |                     |          generic_file_aio_write
                       |                     |          ext4_file_write
                       |                     |          do_sync_write
                       |                     |          vfs_write
                       |                     |          sys_write
                       |                     |          ia32_sysret
                       |                     |          0xf77904be
                       |                     |          __write_nocancel
                       |                     |          
                       |                     |--25.00%-- ext4_da_get_block_prep
                       |                     |          __block_write_begin
                       |                     |          ext4_da_write_begin
                       |                     |          generic_perform_write
                       |                     |          generic_file_buffered_write
                       |                     |          __generic_file_aio_write
                       |                     |          generic_file_aio_write
                       |                     |          ext4_file_write
                       |                     |          do_sync_write
                       |                     |          vfs_write
                       |                     |          sys_write
                       |                     |          ia32_sysret
                       |                     |          0xf77904be
                       |                     |          __write_nocancel
                       |                     |          
                       |                      --25.00%-- next_zones_zonelist
                       |                                get_page_from_freelist
                       |                                __alloc_pages_nodemask
                       |                                alloc_pages_current
                       |                                grab_cache_page_write_begin
                       |                                ext4_da_write_begin
                       |                                generic_perform_write
                       |                                generic_file_buffered_write
                       |                                __generic_file_aio_write
                       |                                generic_file_aio_write
                       |                                ext4_file_write
                       |                                do_sync_write
                       |                                vfs_write
                       |                                sys_write
                       |                                ia32_sysret
                       |                                0xf77904be
                       |                                __write_nocancel
                       |          
                       |--20.92%-- add_to_page_cache_locked.part.29
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                       |--4.60%-- scsi_request_fn
                       |          blk_run_queue
                       |          scsi_run_queue
                       |          scsi_next_command
                       |          scsi_io_completion
                       |          blk_done_softirq
                       |          __do_softirq
                       |          call_softirq
                       |          do_softirq
                       |          irq_exit
                       |          do_IRQ
                       |          ret_from_intr
                       |          |          
                       |          |--63.64%-- copy_user_generic_unrolled
                       |          |          iov_iter_copy_from_user_atomic
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--9.09%-- lock_timer_base.isra.30
                       |          |          try_to_del_timer_sync
                       |          |          del_timer_sync
                       |          |          schedule_timeout
                       |          |          io_schedule_timeout
                       |          |          balance_dirty_pages.isra.15
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--9.09%-- kmem_cache_alloc
                       |          |          alloc_buffer_head
                       |          |          alloc_page_buffers
                       |          |          create_empty_buffers
                       |          |          __block_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |          |--9.09%-- get_page_from_freelist
                       |          |          __alloc_pages_nodemask
                       |          |          alloc_pages_current
                       |          |          grab_cache_page_write_begin
                       |          |          ext4_da_write_begin
                       |          |          generic_perform_write
                       |          |          generic_file_buffered_write
                       |          |          __generic_file_aio_write
                       |          |          generic_file_aio_write
                       |          |          ext4_file_write
                       |          |          do_sync_write
                       |          |          vfs_write
                       |          |          sys_write
                       |          |          ia32_sysret
                       |          |          0xf77904be
                       |          |          __write_nocancel
                       |          |          
                       |           --9.09%-- alloc_buffer_head
                       |                     alloc_page_buffers
                       |                     create_empty_buffers
                       |                     __block_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                       |          
                       |--1.26%-- shrink_inactive_list
                       |          shrink_zone
                       |          shrink_zones
                       |          do_try_to_free_pages
                       |          try_to_free_pages
                       |          __alloc_pages_nodemask
                       |          |          
                       |          |--66.67%-- alloc_pages_vma
                       |          |          do_huge_pmd_anonymous_page
                       |          |          do_page_fault
                       |          |          page_fault
                       |          |          memset
                       |          |          
                       |           --33.33%-- alloc_pages_current
                       |                     grab_cache_page_write_begin
                       |                     ext4_da_write_begin
                       |                     generic_perform_write
                       |                     generic_file_buffered_write
                       |                     __generic_file_aio_write
                       |                     generic_file_aio_write
                       |                     ext4_file_write
                       |                     do_sync_write
                       |                     vfs_write
                       |                     sys_write
                       |                     ia32_sysret
                       |                     0xf77904be
                       |                     __write_nocancel
                        --1.26%-- [...]

     0.27%          iozone  [kernel.kallsyms]           [k] __mem_cgroup_commit_charge
                    |
                    --- __mem_cgroup_commit_charge
                       |          
                       |--99.41%-- __mem_cgroup_commit_charge_lrucare
                       |          mem_cgroup_cache_charge
                       |          add_to_page_cache_locked
                       |          add_to_page_cache_lru
                       |          grab_cache_page_write_begin
                       |          ext4_da_write_begin
                       |          generic_perform_write
                       |          generic_file_buffered_write
                       |          __generic_file_aio_write
                       |          generic_file_aio_write
                       |          ext4_file_write
                       |          do_sync_write
                       |          vfs_write
                       |          sys_write
                       |          ia32_sysret
                       |          0xf77904be
                       |          __write_nocancel
                       |          
                        --0.59%-- mem_cgroup_prepare_migration
                                  unmap_and_move
                                  migrate_pages
                                  compact_zone.part.15
                                  compact_zone_order
                                  try_to_compact_pages
                                  __alloc_pages_direct_compact
                                  __alloc_pages_nodemask
                                  alloc_pages_vma
                                  do_huge_pmd_anonymous_page
                                  do_page_fault
                                  page_fault
                                  memset

     0.27%       flush-8:0  [kernel.kallsyms]           [k] _raw_spin_unlock_irqrestore
                 |
                 --- _raw_spin_unlock_irqrestore
                    |          
                    |--62.87%-- test_set_page_writeback
                    |          ext4_bio_write_page
                    |          mpage_da_submit_io
                    |          mpage_da_map_and_submit
                    |          |          
                    |          |--53.33%-- ext4_da_writepages
                    |          |          writeback_single_inode
                    |          |          writeback_sb_inodes
                    |          |          __writeback_inodes_wb
                    |          |          wb_writeback
                    |          |          |          
                    |          |          |--78.57%-- wb_do_writeback
                    |          |          |          bdi_writeback_thread
                    |          |          |          kthread
                    |          |          |          kernel_thread_helper
                    |          |          |          
                    |          |           --21.43%-- wb_check_old_data_flush
                    |          |                     wb_do_writeback
                    |          |                     bdi_writeback_thread
                    |          |                     kthread
                    |          |                     kernel_thread_helper
                    |          |          
                    |           --46.67%-- write_cache_pages_da
                    |                     ext4_da_writepages
                    |                     writeback_single_inode
                    |                     writeback_sb_inodes
                    |                     __writeback_inodes_wb
                    |                     wb_writeback
                    |                     |          
                    |                     |--73.47%-- wb_do_writeback
                    |                     |          bdi_writeback_thread
                    |                     |          kthread
                    |                     |          kernel_thread_helper
                    |                     |          
                    |                      --26.53%-- wb_check_old_data_flush
                    |                                wb_do_writeback
                    |                                bdi_writeback_thread
                    |                                kthread
                    |                                kernel_thread_helper
                    |          
                    |--31.14%-- ata_scsi_queuecmd
                    |          scsi_dispatch_cmd
                    |          scsi_request_fn
                    |          |          
                    |          |--98.08%-- blk_run_queue
                    |          |          scsi_run_queue
                    |          |          scsi_next_command
                    |          |          scsi_io_completion
                    |          |          blk_done_softirq
                    |          |          __do_softirq
                    |          |          call_softirq
                    |          |          do_softirq
                    |          |          irq_exit
                    |          |          |          
                    |          |          |--90.20%-- do_IRQ
                    |          |          |          ret_from_intr
                    |          |          |          |          
                    |          |          |          |--15.22%-- write_cache_pages_da
                    |          |          |          |          ext4_da_writepages
                    |          |          |          |          writeback_single_inode
                    |          |          |          |          writeback_sb_inodes
                    |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          wb_writeback
                    |          |          |          |          |          
                    |          |          |          |          |--85.71%-- wb_do_writeback
                    |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          kthread
                    |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          
                    |          |          |          |           --14.29%-- wb_check_old_data_flush
                    |          |          |          |                     wb_do_writeback
                    |          |          |          |                     bdi_writeback_thread
                    |          |          |          |                     kthread
                    |          |          |          |                     kernel_thread_helper
                    |          |          |          |          
                    |          |          |          |--15.22%-- find_get_pages_tag
                    |          |          |          |          pagevec_lookup_tag
                    |          |          |          |          |          
                    |          |          |          |          |--57.14%-- write_cache_pages_da
                    |          |          |          |          |          ext4_da_writepages
                    |          |          |          |          |          writeback_single_inode
                    |          |          |          |          |          writeback_sb_inodes
                    |          |          |          |          |          __writeback_inodes_wb
                    |          |          |          |          |          wb_writeback
                    |          |          |          |          |          |          
                    |          |          |          |          |          |--75.00%-- wb_do_writeback
                    |          |          |          |          |          |          bdi_writeback_thread
                    |          |          |          |          |          |          kthread
                    |          |          |          |          |          |          kernel_thread_helper
                    |          |          |          |          |          |          
                    |          |          |          |          |           --25.00%-- wb_check_old_data_flush
                    |          |          |          |          |                     wb_do_writeback
                    |          |          |          |          |                     bdi_writeback_thread
                    |          |          |          |          |                     kthread
                    |          |          |          |          |                     kernel_thread_helper