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

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Message-ID: <9e3c163c-2a89-72d9-ee93-7fea3692b609@linux.alibaba.com>
Date:   Tue, 23 Apr 2019 18:01:14 +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5:46, Peter Zijlstra wrote:
> On Tue, Apr 23, 2019 at 05:36:25PM +0800, 王贇 wrote:
>>
>>
>> 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?
> 
> ms might be best I think.

Will be in next version.

Regards,
Michael Wang

>