Re: [PATCH v4 0/4] cpuacct: split usage into user_usage and sys_usage

[Peter Zijlstra]

On Tue, Mar 22, 2016 at 04:37:04PM +0800, Zhao Lei wrote:
> Sometimes, cpuacct.usage is not detialed enough to user
> to see how much usage a group used. We want to know how
> much time it used in user mode and how much in kernel mode.
> 
> This patch introduce some more files to tell user these information.
>  # ls /sys/fs/cgroup/cpuacct/cpuacct.usage*
>  /sys/fs/cgroup/cpuacct/cpuacct.usage
>  /sys/fs/cgroup/cpuacct/cpuacct.usage_percpu
>  /sys/fs/cgroup/cpuacct/cpuacct.usage_user
>  /sys/fs/cgroup/cpuacct/cpuacct.usage_percpu_user
>  /sys/fs/cgroup/cpuacct/cpuacct.usage_sys
>  /sys/fs/cgroup/cpuacct/cpuacct.usage_percpu_sys
> 
> Changelog v3->v4:
> 1: Add a patch to use for_each_possible_cpu to iterate all cpus,
>    Suggested-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>

Thanks!