linux-kernel - Re: callchain sampling bug in perf?

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Message-ID: <20100821144625.GA19711@infradead.org>
Date:	Sat, 21 Aug 2010 10:46:25 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: callchain sampling bug in perf?

On Sat, Aug 21, 2010 at 10:42:39AM -0400, Christoph Hellwig wrote:
> It does seem to fix the bug for some cases but not all.  Default perf
> report in TUI and the normal command line seem to get it right.  perf
> report -g flat still shows the old problem.  perf report -g flat,0.0
> shows callgraphs, but just as before they just show the 0.<n>
> percentages.

-g graph also shows the same issue of not beeing able to expand the
python line.  It seems like only the fractal case was fixed by that
patch.

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