From: Jens Axboe <jens.axboe@oracle.com>
To: Valerie Clement <valerie.clement@bull.net>
Cc: ext4 development <linux-ext4@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Performance degradation with FFSB between 2.6.20 and 2.6.21-rc7
Date: Thu, 19 Apr 2007 13:58:42 +0200 [thread overview]
Message-ID: <20070419115840.GA11780@kernel.dk> (raw)
In-Reply-To: <462736FC.3090902@bull.net>
On Thu, Apr 19 2007, Valerie Clement wrote:
> Jens Axboe wrote:
> >Please tell me how you are running ffsb, and also please include a
> >dmessg from a booted system.
> >
> Hi,
> our mails crossed! please see my response to Andrew.
> You could reproduce the problem with dd command as suggested, it's more
> easy.
> I'm sending you the dmesg info. For my tests I used the scsci sdc device.
Thanks, it does. Can you try one thing for me? If you run the test on
sdc, try doing:
# echo 64 > /sys/block/sdc/queue/iosched/quantum
and repeat the test.
--
Jens Axboe
next prev parent reply other threads:[~2007-04-19 12:01 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-18 13:54 Performance degradation with FFSB between 2.6.20 and 2.6.21-rc7 Valerie Clement
2007-04-18 20:57 ` Andrew Morton
2007-04-19 9:11 ` Valerie Clement
2007-04-19 9:03 ` Jens Axboe
2007-04-19 9:31 ` Valerie Clement
2007-04-19 11:58 ` Jens Axboe [this message]
2007-04-19 12:41 ` Jens Axboe
2007-04-19 12:45 ` Valerie Clement
2007-04-19 12:46 ` Jens Axboe
2007-04-19 13:22 ` Valerie Clement
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