linux-kernel - Re: [PATCH][RFC] Adding hackbench.c to tools/

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Date:	Mon, 2 Nov 2009 23:57:36 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>
Subject: Re: [PATCH][RFC] Adding hackbench.c to tools/

On Mon, 2 Nov 2009 09:11:24 pm Ingo Molnar wrote:
> 
> * Hitoshi Mitake <mitake@....info.waseda.ac.jp> wrote:
> 
> > Hi Ingo,
> > 
> > It seems that hackbench is the de-fact standard benchmarking program 
> > for scheduler of Linux. But when I ask google where hackbench.c is, 
> > some answers are replied. Like these, (in order of google result)
> > 
> > http://devresources.linux-foundation.org/craiger/hackbench/ (this page 
> > containts link to hackbench.c) 
> > http://people.redhat.com/mingo/cfs-scheduler/tools/hackbench.c
> > 
> > And it seems that second one is newer.
> > 
> > I think this situation is very confusable. So I wrote this patch to 
> > add hackbench to tools/ of kernel tree. This may help hackbench users 
> > like me.
> 
> I think we can do something nicer: would you be interested in adding it 
> as a 'perf bench hackbench' sub-command of tools/perf/?
> 
> We already have the tools to measure scheduling behavior under 'perf 
> sched', so having a 'perf bench' array of common tests would be nice to 
> have.
> 
> ( I've Cc:-ed Rusty, the original author of hackbench.c. Rusty, the file 
>   has no explicit GPLv2 compatible license - is it fine to be put
>   into GPLv2 code? )

Yep, like all my code it's standard v2 "or later".

Sounds like a good plan, thanks!
Rusty.
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