From: William Lee Irwin III <wli@holomorphy.com>
To: Paolo Ornati <ornati@lycos.it>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.1-rc1 [resend]
Date: Wed, 31 Dec 2003 07:06:07 -0800 [thread overview]
Message-ID: <20031231150607.GQ27687@holomorphy.com> (raw)
In-Reply-To: <200312311434.17036.ornati@lycos.it>
On Wed, Dec 31, 2003 at 04:00:07PM +0100, Paolo Ornati wrote:
> With 2.6.1-rc1 I have noticed a strange IDE performance change.
> Results of "hdparm -t /dev/hda" with 2.6.0 kernel:
> (readahead = 256): ~26.31 MB/s
> (readahead = 128): ~31.82 MB/s
> PS = readahead is set to 256 by default on my system, 128 seems to be the
> best value
> Results of "hdparm -t /dev/hda" with 2.6.1-rc1 kernel:
> (readahead = 256): ~26.41 MB/s
> (readahead = 128): ~26.27 MB/s
> Setting readahead to 128 doesn't have the same effect with the new kernel...
What io scheduler are you using? Or, could you post /var/log/dmesg?
-- wli
next prev parent reply other threads:[~2003-12-31 15:07 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-31 8:36 2.6.1-rc1 Linus Torvalds
2003-12-31 8:47 ` 2.6.1-rc1 Mike Fedyk
2003-12-31 10:05 ` 2.6.1-rc1 Tomas Szepe
2003-12-31 12:12 ` 2.6.1-rc1 Jeff Garzik
2003-12-31 15:00 ` 2.6.1-rc1 [resend] Paolo Ornati
2003-12-31 15:06 ` William Lee Irwin III [this message]
2003-12-31 15:19 ` Paolo Ornati
2003-12-31 15:20 ` William Lee Irwin III
2003-12-31 15:45 ` Paolo Ornati
2003-12-31 16:31 ` Ed Sweetman
2003-12-31 18:03 ` Paolo Ornati
2004-01-01 9:12 ` 2.6.1-rc1 Andreas Unterkircher
2004-01-01 18:12 ` 2.6.1-rc1 Paolo Ornati
2004-01-02 4:51 ` 2.6.1-rc1 with JP106 keyboard Go Taniguchi
2004-01-02 5:46 ` Go Taniguchi
2004-01-02 13:20 ` Vojtech Pavlik
2004-01-02 13:17 ` Vojtech Pavlik
2004-01-02 19:01 ` Go Taniguchi
2004-01-02 20:10 ` Vojtech Pavlik
2004-01-03 5:54 ` Go Taniguchi
2004-01-06 18:33 ` 2.6.1-rc1: SCSI: `TIMEOUT' redefined Adrian Bunk
2004-01-06 22:40 ` [PATCH] " Patrick Mansfield
2004-01-06 22:40 ` Andrew Morton
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