linux-kernel - Re: [PATCH v4 0/4] cpuacct: split usage into user_usage and sys

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Message-ID: <20160322094449.GK6344@twins.programming.kicks-ass.net>
Date:	Tue, 22 Mar 2016 10:44:49 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Zhao Lei <zhaolei@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, Tejun Heo <htejun@...il.com>
Subject: Re: [PATCH v4 0/4] cpuacct: split usage into user_usage and sys_usage

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@...radead.org>

Thanks!