linux-kernel - Re: Phoronix CFS vs BFS bencharks

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Date:	Mon, 14 Sep 2009 13:35:33 +0200
From:	Mike Galbraith <efault@....de>
To:	Nikos Chantziaras <realnc@...or.de>
Cc:	Ingo Molnar <mingo@...e.hu>, Con Kolivas <kernel@...ivas.org>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: Phoronix CFS vs BFS bencharks

On Mon, 2009-09-14 at 12:46 +0300, Nikos Chantziaras wrote:
> Phoronix has published some benchmarks, including some "non-synthetic" 
> real-life applications:
> 
>    http://www.phoronix.com/vr.php?view=14179
> 
> The benchmarks are:
> 
>   * World of Padman
>   * Timed Apache Compilation
>   * Timed PHP Compilation
>   * 7-Zip Compression
>   * GraphicsMagick
>   * Apache Benchmark
>   * Threaded I/O Tester
>   * PostMark
> 
> The test was performed on an Ubuntu 9.10 daily snapshot from 2009-09-10 
> with the GNOME 2.27.91 desktop, X Server 1.6.3, NVIDIA 190.32 display 
> driver, GCC 4.4.1, and an EXT4 file-system.

Interesting results.

It'd be nice to see what difference the changes since .31 have made to
these comparisons.  In particular, child_runs_first was found to have a
substantial negative impact on parallel compiles, and has been turned
off.  The reduction of sched_latency has a rather large effect on worst
case latency for CPU hogs, so will likely affect some results markedly.

Hohum, back to the grindstone.

	-Mike

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