linux-kernel - Re: [PATCHSET 0/8] perf tools: Fix scalability problem on callchain merging (v4)

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Date:	Thu, 26 Sep 2013 07:46:36 -0600
From:	David Ahern <dsahern@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>
CC:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	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>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCHSET 0/8] perf tools: Fix scalability problem on callchain
 merging (v4)

On 9/26/13 2:58 AM, Namhyung Kim wrote:
> Hello,
>
> This is a new version of callchain improvement patchset.  I found and
> fixed bugs in the previous version.  I verified that it produced
> exactly same output before and after applying rbtree conversion patch
> (#1).  However after Frederic's new comm infrastructure patches are
> applied it'd be little different.
>
> The patches are on 'perf/callchain-v4' branch in my tree
>
>    git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
>

Given recent breakage, has the patchset been run through any tests on 
older kernels that do not support sample_id_all? e.g., 2.6.34 (WRL4). 
What about tests with the other perf commands -- script to dump events, 
trace on a file with with multiple processes -- to verify no impact on 
comm output, especially multithreaded processes with named threads. I 
can certainly do those tests in time, but can't guarantee a timeframe 
and want to make sure it gets done before merging.

Thanks,
David

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