linux-kernel - Re: [ck] Swap prefetch tester

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Message-Id: <200705171926.04165.kernel@kolivas.org>
Date:	Thu, 17 May 2007 19:26:03 +1000
From:	Con Kolivas <kernel@...ivas.org>
To:	ck@....kolivas.org
Cc:	"Kacper Wysocki" <kacperw@...ine.no>, linux-kernel@...r.kernel.org
Subject: Re: [ck] Swap prefetch tester

On Wednesday 16 May 2007 06:04, Kacper Wysocki wrote:
> ...a nice order of magnitude better! Very happy you fixed this Con.

Great!, thanks for testing.

> Have I understood correctly that there are more prefetch improvements
> in ck2 than just the sp38 patch?

No; 2.6.21-ck2 simply brings it up to sp38. The code in -ck for swap prefetch 
is a little different to suit the SD scheduler and the SCHED_IDLEPRIO patch.
>
> I'll post more results if I ever manage to tear myself from the
> computer for 10 minutes when I'm home - it looks like I have a yiff
> daemon running at 7% cpu all the time which might have affected the
> results.
>
> Speaking of "feel", the net effect of swap prefetch for me seems to be
> that I don't notice it - that is, I don't notice my programs behaving
> sluggishly when I come back to the computer. Excellent!

Excellent!. Thanks very much for your feedback.

-- 
-ck
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