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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




  reply	other threads:[~2007-06-20 23:06 UTC|newest]

Thread overview: 33+ 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
2007-06-24  0:54       ` Eyal Lebedinsky
  -- strict thread matches above, loose matches on Subject: below --
2007-06-23  5:26 SATA Harddisk " Al Boldi

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