linux-kernel - Re: [git pull request] scheduler updates

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Message-Id: <1188076822.5405.13.camel@lappy>
Date:	Sat, 25 Aug 2007 23:20:22 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [git pull request] scheduler updates

On Sat, 2007-08-25 at 19:23 +0200, Ingo Molnar wrote:

> Peter and me tested this all day with various workloads and extreme-load 
> behavior has improved all over the place

Adaptive granularity makes a large difference for me on my somewhat
ancient laptop (1200 MHz). When browsing the interweb using firefox (or
trying to) while doing a (non-niced) kbuild -j5 the difference in
interactivity is significant.

[ kbuild -j5 was quite unbearable on 2.6.22 - so CFS is a clear win in
any case ]

The reduced latency is clearly noticable in a much smoother scroll
behaviour. Whereas both still present a usable browsing experience the
clear reduction in latency spikes makes it much more pleasant.

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