linux-kernel - Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements

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Date:	Tue, 16 Jan 2007 10:44:50 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Pierre Peiffer <pierre.peiffer@...l.net>
Cc:	LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org>,
	Ulrich Drepper <drepper@...hat.com>,
	Jakub Jelinek <jakub@...hat.com>
Subject: Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements


* Pierre Peiffer <pierre.peiffer@...l.net> wrote:

> The modified hackbench is available here:
> 
> http://www.bullopensource.org/posix/pi-futex/hackbench_pth.c

cool!

> I've run this bench 1000 times with pipe and 800 groups.
> Here are the results:
> 
> Test1 - with simple list (i.e. without any futex patches)
> =========================================================
> Latency (s)      min      max      avg      stddev
>                 26.67    27.89    27.14        0.19

> Test2 - with plist (i.e. with only patch 1/4 as is)
>                 26.87    28.18    27.30        0.18

> Test3 - with plist but all SHED_OTHER registered
>                 26.74    27.84    27.16        0.18

ok, seems like the last one is the winner - it's the same as unmodified, 
within noise.

	Ingo
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