linux-kernel - Re: Ten percent test

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Message-Id: <1175850471.22272.8.camel@Homer.simpson.net>
Date:	Fri, 06 Apr 2007 11:07:51 +0200
From:	Mike Galbraith <efault@....de>
To:	Con Kolivas <kernel@...ivas.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	linux list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	ck list <ck@....kolivas.org>
Subject: Re: Ten percent test

On Fri, 2007-04-06 at 11:03 +1000, Con Kolivas wrote:
> On Thursday 05 April 2007 21:54, Ingo Molnar wrote:
> >  - fiftyp.c:  noticeable, but alot better than previously!
> 
> fiftyp.c seems to have been stumbled across by accident as having an effect 
> when Xenofon was trying to recreate Mike's 50% x 3 test case. I suggest a ten 
> percent version like the following would be more useful as a test for the 
> harmful effect discovered in fiftyp.c. (/me throws in obligatory code style 
> change).
> 
> Starts 15 processes that sleep ten times longer than they run. Change forks to 
> 15 times the number of cpus you have and it should work on any size hardware.

I was more focused on the general case, but all I should have to do to
de-claw all of these sleep exploits is account rr time (only a couple of
lines, done and building now).  It's only a couple of lines.

	-Mike

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