From: Roger Luethi <rl@hellgate.ch>
To: Nick Piggin <piggin@cyberone.com.au>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [CFT][PATCH] new scheduler policy
Date: Fri, 22 Aug 2003 17:11:50 +0200 [thread overview]
Message-ID: <20030822151150.GA27508@k3.hellgate.ch> (raw)
In-Reply-To: <3F4615D8.9030200@cyberone.com.au>
On Fri, 22 Aug 2003 23:08:40 +1000, Nick Piggin wrote:
> >I timed a pathological benchmark from hell I've been playing with lately.
> >Three consecutive runs following a fresh boot. Time is in seconds:
> >
> >2.4.21 821 21 25
> >2.6.0-test3-mm1 724 946 896
> >2.6.0-test3-mm1-nick 905 987 997
> >
> >Runtime with ideal scheduling: < 2 seconds (we're thrashing).
> >
>
> Cool. Can you post the benchmark source please?
http://hellgate.ch/code/ploc/thrash.c
A parallel kernel build can generate some decent thrashing, too, but I
wanted a short and simple test case that conveniently provides the
information I need for both logging daemon and post processing tool.
Note: The benchmark could trivially be made more evil which would prevent
2.4.21 from finishing over 30 times faster (as it often does). I
intentionally left it they way it is.
While everybody seems to be working on interactivity, I am currently
looking at this corner case. This should be pretty much orthogonal to your
own work.
Roger
next prev parent reply other threads:[~2003-08-22 15:13 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-19 1:53 [CFT][PATCH] new scheduler policy Nick Piggin
2003-08-19 2:35 ` William Lee Irwin III
2003-08-19 2:46 ` Nick Piggin
2003-08-19 2:59 ` Nick Piggin
2003-08-19 5:15 ` Matt Mackall
2003-08-19 5:34 ` Nick Piggin
2003-08-19 5:45 ` Matt Mackall
2003-08-19 10:24 ` Mike Galbraith
2003-08-19 13:40 ` Nick Piggin
2003-08-19 18:49 ` Mike Galbraith
2003-08-20 2:13 ` William Lee Irwin III
2003-08-25 13:47 ` Haoqiang Zheng
2003-08-25 14:03 ` Nick Piggin
2003-08-25 15:11 ` Haoqiang Zheng
2003-09-02 14:25 ` Pavel Machek
2003-09-08 13:40 ` Alan Cox
2003-09-08 14:20 ` Haoqiang Zheng
2003-09-08 14:28 ` Alan Cox
2003-09-08 15:10 ` Haoqiang Zheng
2003-08-22 8:55 ` Roger Luethi
2003-08-22 13:08 ` Nick Piggin
2003-08-22 15:11 ` Roger Luethi [this message]
2003-08-23 0:22 ` Nick Piggin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20030822151150.GA27508@k3.hellgate.ch \
--to=rl@hellgate.ch \
--cc=linux-kernel@vger.kernel.org \
--cc=piggin@cyberone.com.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox