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From: Steven Rostedt <rostedt@goodmis.org>
To: Arun Sharma <asharma@fb.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	linux-kernel@vger.kernel.org,
	Arnaldo Carvalho de Melo <acme@infradead.org>,
	Andrew Vagin <avagin@openvz.org>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH] trace: reset sleep/block start time on task switch
Date: Wed, 25 Jan 2012 15:15:58 -0500	[thread overview]
Message-ID: <1327522558.22710.47.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <4F205D1D.1020304@fb.com>

On Wed, 2012-01-25 at 11:50 -0800, Arun Sharma wrote:

> # perf record -agP -e sched:sched_switch --filter "prev_state == 1 || 
> prev_state == 2" -e  sched:sched_stat_sleep -- sleep 3
> [ perf record: Woken up 107 times to write data ]
> [ perf record: Captured and wrote 32.629 MB perf.data (~1425585 samples) ]
> Warning:
> Processed 104066 events and lost 4 chunks!
> 
> Check IO/CPU overload!

Just for kicks, could you try trace-cmd?

git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git

trace-cmd record -e sched_switch -f 'prev_state == 1 || prev_state == 2' -e sched_stat_sleep sleep 3

I'm not sure the filter is even needed, and it should still keep up
fine.

-- Steve



  reply	other threads:[~2012-01-25 20:16 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-20  2:20 [PATCH] trace: reset sleep/block start time on task switch Arun Sharma
2012-01-23 11:34 ` Peter Zijlstra
2012-01-23 18:41   ` Arun Sharma
2012-01-23 21:03     ` Peter Zijlstra
2012-01-23 23:02       ` Arun Sharma
2012-01-24 14:27         ` Peter Zijlstra
2012-01-24 21:46           ` Arun Sharma
2012-01-25  9:20             ` Frederic Weisbecker
2012-01-25 19:50               ` Arun Sharma
2012-01-25 20:15                 ` Steven Rostedt [this message]
2012-01-25 22:29                   ` Arun Sharma
2012-01-26  2:27                     ` Frederic Weisbecker
2012-01-26 19:13                       ` Arun Sharma
2012-01-26  2:21                 ` Frederic Weisbecker
2012-02-10 18:43                 ` Peter Zijlstra
2012-02-10 20:07                   ` Arun Sharma

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