linux-kernel - Re: [PATCH 3/4] perf: teach perf inject to merge sched_stat_* and sched

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Message-ID: <m2ehms6ouh.fsf@firstfloor.org>
Date:	Mon, 27 Aug 2012 13:51:02 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Andrew Vagin <avagin@...nvz.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 3/4] perf: teach perf inject to merge sched_stat_* and sched_switch events (v2)

Andrew Vagin <avagin@...nvz.org> writes:
>
> My code saves sched_switch event for each process and when it meets
> stat_iowait, it reports the sched_switch event, because this event
> contains a correct callchain. By another words it replaces all
> stat_iowait events on proper sched_switch events.

Is there any way to generalize this to arbitary events? I found myself
writing scripts to compute lengths between various events.  But I
presume this could be done in a more general way. The advantage
of perf-inject over my script is that the output can be viewed
in the normal browser.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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