From: Peter Zijlstra <peterz@infradead.org>
To: qianjun.kernel@gmail.com
Cc: mingo@redhat.com, juri.lelli@redhat.com,
vincent.guittot@linaro.org, linux-kernel@vger.kernel.org,
Yafang Shao <laoar.shao@gmail.com>
Subject: Re: [PATCH 1/1] Sched/fair: Improve the accuracy of sched_stat_wait statistics
Date: Thu, 15 Oct 2020 13:02:39 +0200 [thread overview]
Message-ID: <20201015110239.GD2611@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20201015064846.19809-1-qianjun.kernel@gmail.com>
On Thu, Oct 15, 2020 at 02:48:46PM +0800, qianjun.kernel@gmail.com wrote:
> From: jun qian <qianjun.kernel@gmail.com>
>
> When the sched_schedstat changes from 0 to 1, some sched se maybe
> already in the runqueue, the se->statistics.wait_start will be 0.
> So it will let the (rq_of(cfs_rq)) - se->statistics.wait_start)
> wrong. We need to avoid this scenario.
>
> Signed-off-by: jun qian <qianjun.kernel@gmail.com>
> Reviewed-by: Yafang Shao <laoar.shao@gmail.com>
Thanks!
next prev parent reply other threads:[~2020-10-15 11:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-15 6:48 [PATCH 1/1] Sched/fair: Improve the accuracy of sched_stat_wait statistics qianjun.kernel
2020-10-15 11:02 ` Peter Zijlstra [this message]
2020-10-29 10:51 ` [tip: sched/core] sched/fair: " tip-bot2 for jun qian
-- strict thread matches above, loose matches on Subject: below --
2020-10-09 9:25 [PATCH 1/1] Sched/fair: " qianjun.kernel
2020-10-14 13:19 ` Peter Zijlstra
2020-10-15 6:06 ` Yafang Shao
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