linux-kernel - Re: [RFC/PATCHSET 00/15] perf report: Add support to accumulate hist periods

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Message-ID: <87wqy73xzo.fsf@sejong.aot.lge.com>
Date:	Wed, 31 Oct 2012 16:24:27 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arun Sharma <asharma@...com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Paul Mackerras <paulus@...ba.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...hat.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [RFC/PATCHSET 00/15] perf report: Add support to accumulate hist periods

On Tue, 30 Oct 2012 10:01:10 +0100, Ingo Molnar wrote:
> * Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
>
>> On Tue, 2012-10-30 at 15:59 +0900, Namhyung Kim wrote:
>
>> > Yes, the callchain part needs to be improved.  Peter's idea 
>> > indeed looks good to me too.
>> 
>> FWIW, I think this is exactly what sysprof does, except that 
>> tool isn't usable for other reasons.. You might want to look 
>> at it though.
>
> I always found the fundamental sysprof system-wide call graph 
> profiling output/view superior - and so do many Xorg developers 
> who are using SysProf that I talked to - so I'd strongly 
> encourage to use that ordering and grouping for the default perf 
> call-graph profiling output/view.

Okay, I'll look at the sysprof.

Anyway, do you have any other comments for the general --cumulate
approach in this series (esp. with --branch-stack)?

Thanks,
Namhyung
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