Message-ID: <4B206A18.2030607@cn.fujitsu.com>
Date: Thu, 10 Dec 2009 11:25:12 +0800
From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
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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
References: <1260391208-6808-1-git-send-regression-fweisbec@gmail.com>
In-Reply-To: <1260391208-6808-1-git-send-regression-fweisbec@gmail.com>
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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
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