From: Andrew Morton <akpm@osdl.org>
To: Ram Pai <linuxram@us.ibm.com>
Cc: ornati@lycos.it, gandalf@wlug.westbo.se, linux-kernel@vger.kernel.org
Subject: Re: Strange IDE performance change in 2.6.1-rc1 (again)
Date: Fri, 9 Jan 2004 11:44:37 -0800 [thread overview]
Message-ID: <20040109114437.550fa5f4.akpm@osdl.org> (raw)
In-Reply-To: <1073675705.14637.8.camel@dyn319250.beaverton.ibm.com>
Ram Pai <linuxram@us.ibm.com> wrote:
>
> 1) see whether you see a regression with files replacing the
> cat command in your script with
> dd if=big_file of=/dev/null bs=1M count=256
You'll need to unmount and remount the fs in between to remove the file
from pagecache. Or use fadvise() to remove the pagecache. There's a
little tool which does that in
http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz
next prev parent reply other threads:[~2004-01-09 19:44 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-02 16:02 Strange IDE performance change in 2.6.1-rc1 (again) Paolo Ornati
2004-01-02 18:08 ` Ed Sweetman
2004-01-02 21:04 ` Paolo Ornati
2004-01-02 21:27 ` Valdis.Kletnieks
2004-01-03 10:20 ` Paolo Ornati
2004-01-02 21:32 ` Mike Fedyk
2004-01-02 22:34 ` Martin Josefsson
2004-01-03 11:13 ` Paolo Ornati
2004-01-03 22:40 ` Andrew Morton
2004-01-04 14:30 ` Paolo Ornati
2004-01-05 23:19 ` Ram Pai
2004-01-07 14:59 ` Paolo Ornati
2004-01-07 19:23 ` Ram Pai
2004-01-07 20:12 ` Paolo Ornati
2004-01-07 23:57 ` Andrew Morton
2004-01-08 7:31 ` Ram Pai
2004-01-09 1:05 ` Ram Pai
2004-01-09 1:17 ` Andrew Morton
2004-01-09 19:15 ` Ram Pai
2004-01-09 19:44 ` Andrew Morton [this message]
2004-01-10 14:48 ` Paolo Ornati
2004-01-10 16:00 ` Ed Sweetman
2004-01-10 16:19 ` Ed Sweetman
2004-01-10 17:29 ` Paolo Ornati
2004-01-10 17:29 ` Paolo Ornati
2004-03-29 15:45 ` Ram Pai
2004-01-04 17:15 ` Buffer and Page cache coherent? was: " Mike Fedyk
2004-01-04 22:10 ` Andrew Morton
2004-01-04 23:22 ` Mike Fedyk
2004-01-04 23:32 ` Andrew Morton
2004-01-04 23:45 ` Mike Fedyk
2004-01-05 0:23 ` Andrew Morton
2004-01-03 10:20 ` Paolo Ornati
2004-01-03 3:33 ` Tobias Diedrich
2004-01-03 4:15 ` Valdis.Kletnieks
2004-01-03 13:39 ` Tobias Diedrich
2004-01-03 20:56 ` Tobias Diedrich
2004-01-04 3:02 ` jw schultz
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