linux-kernel - Re: [REPORT] 2.6.21 vs. 2.6.21-sd046 vs. 2.6.21-CFSv7

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Date:	Wed, 02 May 2007 11:11:42 -0400
From:	Bill Davidsen <davidsen@....com>
To:	"Bill Huey (hui)" <billh@...ppy.monkey.org>
CC:	Linux Kernel M/L <linux-kernel@...r.kernel.org>,
	Con Kolivas <kernel@...ivas.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [REPORT] 2.6.21 vs. 2.6.21-sd046 vs. 2.6.21-CFSv7

Bill Huey (hui) wrote:
> On Mon, Apr 30, 2007 at 03:58:45PM -0400, Bill Davidsen wrote:
>   
>> Followup: I reran with sd-0.46, setting rr_interval to 40, and then 5 
>> (default was 16). Neither appeared to give a useful video playback. I 
>> did try setting the make to nice 10, and that made the playback 
>> perfectly smooth, as well as response to skip forward and volume change 
>> happening when the key was pressed instead of eventually.
>>
>> I also tried raising the nice of X to -10, that made things better on 
>> display, but I winder if it will let X run ahead of the nice-0 raid threads.
>>
>> Is this my hardware or is there a really odd behavior here? The sd seems 
>> to be too fair to cope well with this realistic load, and expecting 
>> users to nice things is probably morally correct but unrealistic.
>>     
>
> People have been reporting very good performance with regards to OpenGL
> applications under SD. What is your video driver ? NVidia proprietary ?
>
>   
My original post I was following gave my config, built-in graphics using 
945G framebuffer. This is a server, I'm not a gamer. The only fancy 
graphics I have are on a system with no on board video at all, I picked 
up a moderately high-end Radeon card to drop in. And to give you an idea 
of what a gamer I am, that uses the vesafb driver ;-)
> OpenGL, X and direct frame buffer access (mplayer and friends) tend not
> to interact each other which can result in very different scheduling
> characteristics between them.
>   

-- 
bill davidsen <davidsen@....com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979

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