linux-kernel - Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

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Message-Id: <1173689733.6748.18.camel@Homer.simpson.net>
Date:	Mon, 12 Mar 2007 09:55:33 +0100
From:	Mike Galbraith <efault@....de>
To:	Con Kolivas <kernel@...ivas.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	ck list <ck@....kolivas.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

On Mon, 2007-03-12 at 19:29 +1100, Con Kolivas wrote:

> I'll save you the trouble. I just checked myself and indeed the load is only 
> 1. What this means is that although there are 2 tasks running, only one is 
> running at any time making a total load of 1. So, if we add two other tasks 
> that add 2 more to the load the total load is 3. However if we weight the 
> other two tasks at nice 5, they only add .75 each to the load making a 
> weighted total of 2.5. This means that X+Gforce together should get a total 
> of 1/2.5 or 40% of the overall cpu. That sounds like exactly what you're 
> describing is happening.

Hmm.  So... anything that's client/server is going to suffer horribly
unless niced tasks are niced all the way down to 19?

	-Mike

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