On Sun, Jan 31, 2016 at 3:18 PM, Kevin Wilson <wkevils@gmail.com> wrote:
Hi,
I had tried to perform the following test according to: http://lxr.free-electrons.com/source/Documentation/cgroups/memcg_test.txt#L2... mkdir /sys/fs/cgroup/memory/group1
echo $$ > /sys/fs/cgroup/memory/group1/cgroup.procs
Hi... maybe you should test with "echo 0" like mentioned in the example? IMHO, echo $$ will yield PID of your current PID of task invocation in bash, and I think that's different with the PID of malloc program you ran. hence the result you saw
echo 40M > /sys/fs/cgroup/memory/group1/memory.limit_in_bytes
Run a process which is a very short program, allocating 100MB: int main() { // Allocate 100 MB void *mem = malloc(1024*1024*100); if (mem) printf("malloc is ok\n"); pause(); }
VmSize seems a bit larger than 100MB, and this seems ok, when adding the overhead of running a process: cat /proc/$$/status | grep VmSize VmSize: 116920 kB
cat /sys/fs/cgroup/memory/group1/memory.stat | grep swap swap 0 total_swap 0
cat /proc/$$/status | grep -i swap VmSwap: 0 kB
I would expect that the swap will be 60M according to the link to the memcg_test.txt mentioned earlier.
Any ideas ?
Regards, Kevin
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