linux-kernel - Re: [PATCH] perf lock: clean the options for perf record

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Message-ID: <4D70B3E1.8020108@dcl.info.waseda.ac.jp>
Date:	Fri, 04 Mar 2011 18:41:53 +0900
From:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To:	Frederic Weisbecker <fweisbec@...il.com>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, h.mitake@...il.com,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] perf lock: clean the options for perf record

On 03/01/11 23:55, Frederic Weisbecker wrote:
> On Sat, Feb 26, 2011 at 02:10:30AM +0900, Hitoshi Mitake wrote:
>> It seems that I was too preprocessed with the method and
>> forgot the purpose...
>>
>> Maybe the things like simple lockstat visualizer or
>> special diff between two lockstat snapshots are
>> useful for the first looking at big picture.
>> I feel that they have worth to write and test.
>
> Indeed they sound like good ideas. Being able to do a diff
> on locks profiles would be useful to compare two changes on
> the kernel.
>

BTW, how do you think about the idea of exporting data in
python (or other neutral) expression from procfs? I feel it is a
good idea. Communicating with unified format between user space and
kernel space will reduce lots of parsing overhead. Is this too
aggressive or insane?
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