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From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH] perf sched: Add max delay time snapshot
Date: Thu, 10 Dec 2009 11:25:12 +0800	[thread overview]
Message-ID: <4B206A18.2030607@cn.fujitsu.com> (raw)
In-Reply-To: <1260391208-6808-1-git-send-regression-fweisbec@gmail.com>



Frederic Weisbecker wrote:
> When we have a maximum latency reported for a task, we need a
> convenient way to find the matching location to the raw traces
> or to perf sched map that shows where the task has been eventually
> scheduled in. This gives a pointer to retrieve the events that occured
> during this max latency.
> 

Then, we can cooperate with ftrace's data to know what the cpu is
doing at that time.

Reviewed-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>

Thanks,
Xiao

  reply	other threads:[~2009-12-10  3:26 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-09 20:40 [PATCH] perf sched: Add max delay time snapshot Frederic Weisbecker
2009-12-10  3:25 ` Xiao Guangrong [this message]
2009-12-10  7:23   ` Ingo Molnar
2009-12-10  8:15     ` Xiao Guangrong
2009-12-10  8:27       ` Ingo Molnar
2009-12-10  8:46         ` Xiao Guangrong
2009-12-10  7:50 ` [tip:perf/urgent] " tip-bot for Frederic Weisbecker

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