From: Peter Zijlstra <peterz@infradead.org>
To: Joonwoo Park <joonwoop@codeaurora.org>
Cc: Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH] sched: fix incorrect wait time and wait count statistics
Date: Sun, 25 Oct 2015 11:08:50 +0100 [thread overview]
Message-ID: <20151025100850.GO2508@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <1445750594-14078-1-git-send-email-joonwoop@codeaurora.org>
On Sat, Oct 24, 2015 at 10:23:14PM -0700, Joonwoo Park wrote:
> At present scheduler resets task's wait start timestamp when the task
> migrates to another rq. This misleads scheduler itself into reporting
> less wait time than actual by omitting time spent for waiting prior to
> migration and also more wait count than actual by counting migration as
> wait end event which can be seen by trace or /proc/<pid>/sched with
> CONFIG_SCHEDSTATS=y.
>
Have you seen:
1de64443d755 ("sched/core: Fix task and run queue sched_info::run_delay inconsistencies")
?
next prev parent reply other threads:[~2015-10-25 10:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-25 5:23 [PATCH] sched: fix incorrect wait time and wait count statistics Joonwoo Park
2015-10-25 10:08 ` Peter Zijlstra [this message]
2015-10-25 10:26 ` Peter Zijlstra
2015-10-27 1:44 ` Joonwoo Park
2015-10-27 12:57 ` Peter Zijlstra
2015-10-28 2:40 ` Joonwoo Park
2015-10-28 4:46 ` [PATCH v4] " Joonwoo Park
2015-11-06 13:57 ` Peter Zijlstra
2015-11-07 2:41 ` Joonwoo Park
2015-11-09 10:32 ` Peter Zijlstra
2015-11-13 3:38 ` [PATCH v5] " Joonwoo Park
2015-11-23 16:20 ` [tip:sched/core] sched/core: Fix " tip-bot for Joonwoo Park
2015-10-27 19:17 ` [PATCH v3] sched: fix " Joonwoo Park
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