linux-kernel - Re: BFS vs. mainline scheduler benchmarks and measurements

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Message-ID: <20090918112454.GE9930@elte.hu>
Date:	Fri, 18 Sep 2009 13:24:54 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Michael Buesch <mb@...sch.de>
Cc:	Con Kolivas <kernel@...ivas.org>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>, Felix Fietkau <nbd@...nwrt.org>
Subject: Re: BFS vs. mainline scheduler benchmarks and measurements


* Michael Buesch <mb@...sch.de> wrote:

> On Tuesday 08 September 2009 09:48:25 Ingo Molnar wrote:
> > Mind poking on this one to figure out whether it's all repeatable 
> > and why that slowdown happens?
> 
> I repeated the test several times, because I couldn't really believe 
> that there's such a big difference for me, but the results were the 
> same. I don't really know what's going on nor how to find out what's 
> going on.

Well that's a really memory constrained MIPS device with like 16 MB of 
RAM or so? So having effects from small things like changing details in 
a kernel image is entirely plausible.

	Ingo
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