linux-kernel - Re: [REPORT] First "glitch1" results, 2.6.21-rc7-git6-CFSv5 + SD 0.46

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Date:	Mon, 23 Apr 2007 19:45:25 -0400
From:	Ed Tomlinson <edt@....ca>
To:	davidsen@...idon.tmr.com, "Kolivas, Con" <kernel@...ivas.org>,
	"Molnar, Ingo" <mingo@...e.hu>
Cc:	Linux Kernel M/L <linux-kernel@...r.kernel.org>
Subject: Re: [REPORT] First "glitch1" results, 2.6.21-rc7-git6-CFSv5 + SD 0.46

On Monday 23 April 2007 17:57, Bill Davidsen wrote:
> I am not sure a binary attachment will go thru, I will move to the web 
> ste if not.

I did a quick try of this script here.

With SD 0.46 with X at nice 0 I was getting 1-2 frames per second.  I decided to try cfs v5.
The option disable auto renicing did not work so many threads other than X are now at -19...

SD 0.46		1-2 FPS
cfs v5 nice -19	219-233 FPS
cfs v5 nice 0 	1000-1996

Looks like, in this case, nice -19 for X is NOT a good idea.

Kernel is 2.6.20.7 (gentoo) UP amd64 with HZ 300 voluntary prempt (a fully premptable kernel eventually 
locks up switching between 32 and 64 apps)

Thanks,

Ed Tomlinson
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