linux-kernel - Re: [patch] CFS scheduler, -v5

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Date:	Sun, 22 Apr 2007 22:39:40 -0400
From:	Gene Heskett <gene.heskett@...il.com>
To:	Nick Piggin <npiggin@...e.de>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Williams <pwil3058@...pond.net.au>,
	Thomas Gleixner <tglx@...utronix.de>, caglar@...dus.org.tr,
	Willy Tarreau <w@....eu>, Mark Lord <lkml@....ca>,
	Ulrich Drepper <drepper@...hat.com>
Subject: Re: [patch] CFS scheduler, -v5

On Sunday 22 April 2007, Nick Piggin wrote:
>On Mon, Apr 23, 2007 at 03:12:29AM +0200, Ingo Molnar wrote:
>> i'm pleased to announce release -v5 of the CFS scheduler patchset. The
>> patch against v2.6.21-rc7 and v2.6.20.7 can be downloaded from:
>>
>>     http://redhat.com/~mingo/cfs-scheduler/
>>
>> this CFS release mainly fixes regressions and improves interactivity:
>>
>>     13 files changed, 211 insertions(+), 199 deletions(-)
>>
>> the biggest user-visible change in -v5 are various interactivity
>> improvements (especially under higher load) to fix reported regressions,
>> and an improved way of handling nice levels. There's also a new
>> sys_sched_yield_to() syscall implementation for i686 and x86_64.
>>
>> All known regressions have been fixed. (knock on wood)
>
>I think the granularity is still much too low. Why not increase it to
>something more reasonable as a default?

I haven't approached that yet, but I just noticed, having been booted to this 
for all of 5 minutes, that although I told it not to renice x when my script 
ran 'make oldconfig', and I answered n, but there it is, sitting at -19 
according to htop.

The .config says otherwise:
[root@...ote linux-2.6.21-rc7-CFS-v5]# grep RENICE .config
# CONFIG_RENICE_X is not set

So v5 reniced X in spite of the 'no' setting.

Although I hadn't noticed it, one way or the other, I just set it (X) back to 
the default -1 so that I'm comparing the same apples when I do compare.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Fortune finishes the great quotations, #2

	If at first you don't succeed, think how many people
	you've made happy.

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