linux-kernel - Re: [PATCH] futex: add FUTEX_SET

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Message-ID: <4B02DCE4.1080509@us.ibm.com>
Date:	Tue, 17 Nov 2009 09:27:00 -0800
From:	Darren Hart <dvhltc@...ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Michel Lespinasse <walken@...gle.com>,
	Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH] futex: add FUTEX_SET_WAIT operation

Ingo Molnar wrote:
> * Peter Zijlstra <peterz@...radead.org> wrote:
> 
>> On Tue, 2009-11-17 at 09:18 +0100, Ingo Molnar wrote:
>>> Would you be interested in adding it as a 'perf bench futex' testcase? 
>>> That way kernel developers could monitor futex performance in the future 
>>> as well.
>>>
>>> See 'perf bench' in the latest perf events tree:
>>>
>>>   http://people.redhat.com/mingo/tip.git/README
>>>
>>> Do 'cd tools/perf; make -j install' to install perf.
>> Darren has recently been putting a lot of effort in making a futex test
>> suite:
>>
>> http://git.kernel.org/?p=linux/kernel/git/dvhart/futextest.git
>>
>> Its not yet complete, but hopefully it will soon be :-)
> 
> Looks nice! Any futex performance measurements within it could be added 
> to perf bench - with standardized options and output, etc.
> 
> 	Ingo

I'll take a look at perf this week and see what would be required to 
share (?) tests between perf and futextest.

-- 
Darren Hart
IBM Linux Technology Center
Real-Time Linux Team
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