From: James Andrewartha <jamesa@daa.com.au>
To: Grant Grundler <grundler@google.com>
Cc: Peter Rabbitson <rabbit+list@rabbit.us>, linux-ide@vger.kernel.org
Subject: Re: Mysteriously slow writes SiI 3124
Date: Wed, 01 Apr 2009 13:34:00 +0800 [thread overview]
Message-ID: <49D2FCC8.1060204@daa.com.au> (raw)
In-Reply-To: <da824cf30903040910gff4d99en8fc8097fc6a05668@mail.gmail.com>
Grant Grundler wrote:
> On Tue, Mar 3, 2009 at 11:10 PM, Peter Rabbitson <rabbit+list@rabbit.us> wrote:
>> No takers? Can I provide more info/measurements/whatever? I would
>> really like to get to the bottom of this, pretty frustrating.
>
> Are you ok with wild guesses?
> This sounds remarkable similar to the performance of the equivalent
> PCIe SATA controller from Silicon Image (3132). The 3132 has 1 PCI-E
> lane and should able to move more than 220 MB/s or so. But in fact can
> only read 120MB/s and write 170MB/s.
The hardware is limited:
http://ata.wiki.kernel.org/index.php/Hardware,_driver_status#Silicon_Image_3124
http://www.mail-archive.com/linux-ide@vger.kernel.org/msg10143.html
http://markmail.org/message/dkwn2imwkjg7aeyl
--
James Andrewartha
next prev parent reply other threads:[~2009-04-01 5:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-01 22:09 Mysteriously slow writes SiI 3124 Peter Rabbitson
2009-03-04 7:10 ` Peter Rabbitson
2009-03-04 17:10 ` Grant Grundler
2009-03-04 17:39 ` Peter Rabbitson
2009-04-01 5:34 ` James Andrewartha [this message]
2009-03-04 19:06 ` Greg Freemyer
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