linux-kernel - Re: [PATCH 2/3] perf: teach perf inject to merge sched_stat_* and sched

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Message-ID: <20120806233146.GK21441@infradead.org>
Date:	Mon, 6 Aug 2012 20:31:46 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Andrey Wagin <avagin@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>, David Ahern <dsahern@...il.com>
Subject: Re: [PATCH 2/3] perf: teach perf inject to merge sched_stat_* and
 sched_switch events

Em Mon, Aug 06, 2012 at 07:00:00PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Mon, Aug 06, 2012 at 11:43:04PM +0400, Andrey Wagin escreveu:
> > 2012/8/6 Arnaldo Carvalho de Melo <acme@...stprotocols.net>:
> > >> +struct perf_session  *session;

> > perf_event__sched_stat (perf_inject.sample) uses "session" for getting
> > an event name. I don't know how to get it by another way
> 
> Can you try with the attached patch? We already lookup the event_format
> entries when we read the perf.data header so that we can cache
> evsel->name, we might as well cache the event_format in
> evsel->tp_format, so that tools don't have to relookup this for each
> sample.

Attached goes a more complete patch that removes the pevent_find_event
calls from several tools, David, could you give it some testing?

- Arnaldo

View attachment "perf_evsel_tp_format.patch" of type "text/plain" (16373 bytes)