linux-kernel - Re: [PATCH 6/8] perf tools: Add new comm infrastructure

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Message-ID: <20131029092031.GC17514@localhost.localdomain>
Date:	Tue, 29 Oct 2013 10:20:33 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Namhyung Kim <namhyung@...nel.org>,
	David Ahern <dsahern@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 6/8] perf tools: Add new comm infrastructure

On Mon, Oct 28, 2013 at 02:48:43PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Oct 28, 2013 at 02:01:11PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Mon, Oct 28, 2013 at 05:05:30PM +0100, Frederic Weisbecker escreveu:
> > > 
> > > Also it differentiate between pre-exec and post-fork events, which looks
> > > more precise (and it fixes some comm mangling as well):
> > > 
> > > 
> > > Before:
> > > 
> > >      # Overhead          Command
> > >      # ........  ...............
> > >      #
> > >        100.00%  sched-me
> > 
> > I noticed the above, just on the --stdio tho, checking why this is so...
> > Can you try without --stdio, even using --tui?
> 
> Thanks for this report, if you try my perf/urgent now it should be
> fixed, was a problem fixed by Jiri Olsa that I thought affected only
> perf/core.
> 
> I cherry picked it and it fixed the problem for me, can you check that?

Yep, I checked your perf/urgent queue 8e50d384cc1d5afd2989cf0f7093756ed7164eb2 and it's
fixed there, although I can't find the particular patch fixing this, but it works :)

Thanks.

> 
> - Arnaldo
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