linux-kernel - Re: [RFC PATCH 2/5] numa: append per-node execution info in memory.numa

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Message-ID: <8c3ad96d-7f3d-d966-6acc-8327023ae3f9@linux.alibaba.com>
Date:   Tue, 23 Apr 2019 17:36:25 +0800
From:   王贇 <yun.wang@...ux.alibaba.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     hannes@...xchg.org, mhocko@...nel.org, vdavydov.dev@...il.com,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [RFC PATCH 2/5] numa: append per-node execution info in
 memory.numa_stat



On 2019/4/23 下午4:52, Peter Zijlstra wrote:
> On Mon, Apr 22, 2019 at 10:12:20AM +0800, 王贇 wrote:
>> This patch introduced numa execution information, to imply the numa
>> efficiency.
>>
>> By doing 'cat /sys/fs/cgroup/memory/CGROUP_PATH/memory.numa_stat', we
>> see new output line heading with 'exectime', like:
>>
>>   exectime 24399843 27865444
>>
>> which means the tasks of this cgroup executed 24399843 ticks on node 0,
>> and 27865444 ticks on node 1.
> 
> I think we stopped reporting time in HZ to userspace a long long time
> ago. Please don't do that.

Ah I see, let's make it us maybe?

Regards,
Michael Wang

>