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Message-ID: <20091218130642.GA17033@elte.hu>
Date: Fri, 18 Dec 2009 14:06:42 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Mike Galbraith <efault@....de>
Cc: Jason Garrett-Glaser <darkshikari@...il.com>,
Kasper Sandberg <lkml@...anurb.dk>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
LKML Mailinglist <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: x264 benchmarks BFS vs CFS
* Mike Galbraith <efault@....de> wrote:
> > I'm personally curious as to what kind of scheduler issues this results
> > in--I haven't done any BFS vs CFS tests with this option enabled yet.
>
> I'll look for x264 source, and patch/piddle.
btw., would be nice to look at it via tools/perf/ as well:
perf stat --repeat 3 ...
to see the basic hardware utilization (cycles/cache-misses, branch execution
rate, instructions, etc.) and the basic parallelism metrics, at a glance.
i suspect "perf stat -e L1-icache-loads -e L1-icache-load-misses" would give
us an even more detailed picture.
Ingo
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