From: Jeff Dike <jdike@addtoit.com>
To: Sven 'Darkman' Michels <sven@darkman.de>
Cc: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] [PATCH] host context switch reduction
Date: Mon, 15 Mar 2004 14:13:10 -0500 [thread overview]
Message-ID: <20040315191310.GB23741@ccure.user-mode-linux.org> (raw)
In-Reply-To: <405596A9.4020601@darkman.de>
On Mon, Mar 15, 2004 at 12:42:33PM +0100, Sven 'Darkman' Michels wrote:
> Well, we just looked at the context switches. We started 3 UMLs which
> were doing a make world for xfree. Without patches the number of
> context switches per second was around 60k, with the patch it was around
> 40k - so it's noticeable, at least from the cs.
Sure it's going to have a noticable effect on cs, that's its whole point.
However, users don't see cs - they see how quickly things run. I was a bit
dismissive of the 3.5% improvement of the kernel build, but if you look at
the 20-30% hit that UML takes, that 3.5% is a noticable chunk of it.
Jeff
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next prev parent reply other threads:[~2004-03-15 18:40 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-29 4:35 [uml-devel] [PATCH] host context switch reduction Jeff Dike
2004-02-29 16:48 ` BlaisorBlade
2004-03-15 11:42 ` Sven 'Darkman' Michels
2004-03-15 19:13 ` Jeff Dike [this message]
2004-05-17 20:08 ` roland
2004-05-17 22:00 ` Laurent Vivier
2004-05-17 22:22 ` roland
2004-05-18 17:59 ` Jeff Dike
2004-05-19 17:27 ` Laurent Vivier
2004-05-19 18:01 ` roland
2004-05-19 18:17 ` Laurent Vivier
2004-05-19 19:39 ` roland
2004-05-19 19:49 ` Laurent Vivier
2004-05-20 2:30 ` roland
2004-05-20 12:49 ` Laurent Vivier
2004-05-23 0:42 ` [uml-devel] [PATCH] commandline switch for sysemu patch roland
2004-05-23 13:31 ` [uml-devel] [PATCH] host context switch reduction roland
2004-05-19 23:54 ` Jeff Dike
2004-05-20 1:01 ` roland
2004-05-20 14:12 ` Henrik Nordstrom
2004-05-20 15:27 ` roland
2004-05-20 15:35 ` Henrik Nordstrom
2004-05-19 22:40 ` Nuno Silva
2004-05-20 18:28 ` roland
2004-05-20 18:47 ` Henrik Nordstrom
2004-05-27 6:16 ` Christopher S. Aker
2004-05-27 8:22 ` Laurent Vivier
2004-05-27 9:25 ` Christopher S. Aker
2004-05-27 11:50 ` Laurent Vivier
2004-05-28 4:53 ` [uml-devel] [PATCH] host context switch reduction Benchmarks Christopher S. Aker
-- strict thread matches above, loose matches on Subject: below --
2004-05-20 2:34 [uml-devel] [PATCH] host context switch reduction roland
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