linux-kernel - Re: [PATCH 0/4] perf: Teach perf tool to profile sleep times (v2)

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Date:	Wed, 8 Aug 2012 09:02:18 +0400
From:	Andrey Wagin <avagin@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: Re: [PATCH 0/4] perf: Teach perf tool to profile sleep times (v2)

2012/8/8 Namhyung Kim <namhyung@...nel.org>:
>>
>> $ ./perf record -e sched:sched_stat_sleep -e sched:sched_switch \
>>               -e sched:sched_process_exit -gP -o ~/perf.data.raw ~/foo

Actually this string is not completed, because sched:sched_switch
should be filtered by state.

>> [ perf record: Woken up 1 times to write data ]
>> [ perf record: Captured and wrote 0.015 MB /root/perf.data.raw (~661 samples) ]
>> $ ./perf inject -v -s -i ~/perf.data.raw -o ~/perf.data
>> $ ./perf report -i ~/perf.data
>
> The usage like this is too specific and hard to use IMHO. How about
> putting it somehow into perf sched or new command?
>
> /me don't have an idea though. :-)
>

I'm going to add a script, so the usage will look like this:
$ perf script record sched-stat -e sched:sched_stat_sleep <command>
This command will collect sched_stat_* and proper sched_switch events
$ perf script report sched-stat
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