linux-kernel - Re: Ten percent test

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Date:	Sun, 08 Apr 2007 20:51:16 +0200
From:	Rene Herman <rene.herman@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Gene Heskett <gene.heskett@...il.com>,
	linux-kernel@...r.kernel.org, Con Kolivas <kernel@...ivas.org>,
	Mike Galbraith <efault@....de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	ck list <ck@....kolivas.org>
Subject: Re: Ten percent test

On 04/08/2007 12:41 PM, Ingo Molnar wrote:

> this is pretty hard to get right, and the most objective way to change 
> it is to do it testcase-driven. FYI, interactivity tweaking has been 
> gradual, the last bigger round of interactivity changes were done a year 
> ago:
> 
>  commit 5ce74abe788a26698876e66b9c9ce7e7acc25413
>  Author: Mike Galbraith <efault@....de>
>  Date:   Mon Apr 10 22:52:44 2006 -0700
> 
>      [PATCH] sched: fix interactive task starvation
> 
> (and a few smaller tweaks since then too.)
> 
> and that change from Mike responded to a testcase. Mike's latest changes 
> (the ones you just tested) were mostly driven by actual testcases too, 
> which measured long-term timeslice distribution fairness.

Ah yes, that one. Here's the next one in that series:

commit f1adad78dd2fc8edaa513e0bde92b4c64340245c
Author: Linus Torvalds <torvalds@...osdl.org>
Date:   Sun May 21 18:54:09 2006 -0700

     Revert "[PATCH] sched: fix interactive task starvation"

It personally had me wonder if _anyone_ was testing this stuff...

Rene.

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