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

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Message-ID: <20120829082752.GA4638@avaginn.sw.ru>
Date:	Wed, 29 Aug 2012 12:27:53 +0400
From:	Andrew Vagin <avagin@...allels.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andrew Vagin <avagin@...nvz.org>,
	"linux-kernel@...r.kernel.org" <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)

On Tue, Aug 28, 2012 at 12:51:02AM +0400, Andi Kleen wrote:
> 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.

I don't know what do you mean to generalize this to arbitary events.
I think a generalization will be obvious, when we will have a few
examples.

Currently we can modify events by a simple way.
What would I want to have? It's a way to create a new event type and
events in "perf inject".

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