From: Jeff Garzik <jeff@garzik.org>
To: Carlo Wood <carlo@alinoe.com>, linux-kernel@vger.kernel.org
Subject: Re: SATA Harddisk speed drop of 100 MB/s
Date: Wed, 20 Jun 2007 19:06:06 -0400 [thread overview]
Message-ID: <4679B2DE.9090903@garzik.org> (raw)
In-Reply-To: <20070620224847.GA5488@alinoe.com>
Carlo Wood wrote:
> hdparm -tT gives over 160 MB/s for my tripple 10k rpm Raptor RAID5
> on 2.6.18, as expected.
>
> In 2.6.22-rc5 this dropped to only 60 MB/s !
>
> Is this a known issue?
>
> I also measured it with bonnie; I get 108 MB/s reading speed on
> 2.6.18 and only 68 MB/s on 2.6.22-rc5.
More info needed... kernel config, before-and-after dmesg output, lspci
output.
Jeff
next prev parent reply other threads:[~2007-06-20 23:06 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-20 22:48 SATA Harddisk speed drop of 100 MB/s Carlo Wood
2007-06-20 23:06 ` Jeff Garzik [this message]
2007-06-21 3:36 ` Arjan van de Ven
2007-06-22 16:21 ` Carlo Wood
2007-06-22 21:17 ` Henrique de Moraes Holschuh
2007-06-22 21:27 ` Carlo Wood
2007-06-23 1:31 ` Henrique de Moraes Holschuh
2007-06-23 2:59 ` Carlo Wood
2007-06-23 17:29 ` Andrew Morton
2007-06-23 22:21 ` Jeff Garzik
2007-06-25 15:18 ` Lennart Sorensen
2007-06-25 16:04 ` Carlo Wood
2007-06-22 21:44 ` SATA RAID5 " Carlo Wood
2007-06-23 3:54 ` Carlo Wood
2007-06-23 6:22 ` Tejun Heo
2007-06-22 21:48 ` Carlo Wood
2007-06-23 7:03 ` Jeff Garzik
2007-06-23 7:54 ` Tejun Heo
2007-06-23 12:53 ` Carlo Wood
2007-06-23 17:30 ` Bartlomiej Zolnierkiewicz
2007-06-23 22:43 ` Jeff Garzik
2007-06-24 11:58 ` Michael Tokarev
2007-06-24 12:59 ` Dr. David Alan Gilbert
2007-06-24 14:21 ` Justin Piszcz
2007-06-24 15:52 ` Michael Tokarev
2007-06-24 16:59 ` Justin Piszcz
2007-06-24 22:07 ` Carlo Wood
2007-06-24 23:46 ` Mark Lord
2007-06-25 0:23 ` Patrick Mau
2007-06-24 15:48 ` Michael Tokarev
2007-07-05 22:12 ` Phillip Susi
2007-06-23 5:26 SATA Harddisk " Al Boldi
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