Fwd: 14.31% send_full_color_rect.isra.12

[Darshan Ghumare]

Hi,

I ran following command,

./x86_64-softmmu/qemu-system-x86_64 -k en-us --show-cursor  --enable-kvm
-smp 2  -m 1024 -hda  /var/opt/kvm/img/ubuntu14.04.img   -drive
if=none,id=drive1,cache=none,format=raw,aio=native,file=cvbd://
127.0.0.1:6380/win7.img?block_size=4096 -device virtio-blk,drive=drive1
-vnc :0

perf out shoed me 14.31% send_full_color_rect.isra.12. Following is the
output of

 14.31%  qemu-system-x86  libz.so.1.2.8            [.] 0x0000000000002ae7

  ◆

   - 0x7f6660d67ae7

      ▒

   + 0x7f6660d68968

      ▒

   + deflate

      ▒

   - tight_compress_data

      ▒

      - 14.31% send_full_color_rect.isra.12

      ▒

           send_sub_rect

      ▒

         - tight_send_framebuffer_update

      ▒

              14.23% vnc_worker_thread_loop

      ▒

            - 0.08% tight_send_framebuffer_update

      ▒

               - 0.05% tight_send_framebuffer_update

      ▒

                  - tight_send_framebuffer_update

      ▒

                       0.03% vnc_worker_thread_loop

      ▒

                     - 0.01% tight_send_framebuffer_update

      ▒

                          vnc_worker_thread_loop

      ▒

                 0.03% vnc_worker_thread_loop

      ▒

      - 0.00% send_sub_rect

      ▒

           tight_send_framebuffer_update

      ▒

           vnc_worker_thread_loop

      ▒

+    4.68%  qemu-system-x86  libz.so.1.2.8            [.]
0x0000000000002ac0
                        ▒

+    3.65%  qemu-system-x86  libz.so.1.2.8            [.]
0x0000000000002ae1
                        ▒

+    3.56%  qemu-system-x86  libz.so.1.2.8            [.]
0x0000000000002ad0
                        ▒

+    2.71%  qemu-system-x86  libz.so.1.2.8            [.]
0x0000000000002ac7
                        ▒

+    2.31%  qemu-system-x86  qemu-system-x86_64       [.]
vnc_refresh_server_surface
                        ▒

-    1.90%  qemu-system-x86  [kernel.kallsyms]        [k] vcpu_enter_guest



Following are the commands that I ran,

root at Machine3:~# perf record --call-graph dwarf -p 4101

^C[ perf record: Woken up 2141 times to write data ]

[ perf record: Captured and wrote 536.328 MB perf.data (~23432515 samples) ]


root at Machine3:~# perf report -g graph --no-children

root at Machine3:~# uname -a

Linux Machine3 3.16.0-46-generic #62~14.04.1-Ubuntu SMP Tue Aug 11 16:27:16
UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

root at Machine3:~# egrep -c '(vmx|svm)' /proc/cpuinfo

4

root at Machine3:~# kvm-ok

INFO: /dev/kvm exists

KVM acceleration can be used

Any reason why its taking so much time.

Thanks,
Darshan
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