From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030415AbVKPSVR (ORCPT ); Wed, 16 Nov 2005 13:21:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030387AbVKPSVR (ORCPT ); Wed, 16 Nov 2005 13:21:17 -0500 Received: from bay108-f28.bay108.hotmail.com ([65.54.162.38]:24002 "EHLO hotmail.com") by vger.kernel.org with ESMTP id S1030384AbVKPSVQ (ORCPT ); Wed, 16 Nov 2005 13:21:16 -0500 Message-ID: X-Originating-IP: [66.92.248.193] X-Originating-Email: [joneserstein@hotmail.com] In-Reply-To: <437ABC1E.7040301@gmail.com> From: "Jones Joneser" To: htejun@gmail.com Cc: linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: PROBLEM: Tyan s2822 and SATA slowness / erratic speeds kernel 2.6 Date: Wed, 16 Nov 2005 18:21:16 +0000 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 16 Nov 2005 18:21:16.0392 (UTC) FILETIME=[88820680:01C5EADA] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org We experience the same issue when using an LSI SATA controller and the Tyan motherboard. In addition we did try vanilla 2.6.14.2 and experienced the same slowdown issues. -asher
From: Tejun Heo <htejun@gmail.com>
To: Jones Joneser <joneserstein@hotmail.com>
CC: linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org,linux-kernel@vger.kernel.org
Subject: Re: PROBLEM: Tyan s2822 and SATA slowness / erratic speeds kernel 2.6
Date: Wed, 16 Nov 2005 13:57:02 +0900
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>Jones Joneser wrote:
> > Machine:
> > Tyan s2822G3NR-D
> > Silicon Image, Inc. SiI 3114
> > SATA Drives: Western Digital 300gb / seagate 80 gb
> >
> > Initially we thought we had a network issue because we were seeing a
> > slowdown when transferring files > 512Mb in size (by whatever method:
> > rsync, cp, scp, etc.) between two of the Tyan servers, we see the first
> > 512Mb go at a decent rate (tens of megabytes per second) and then the
> > rate plummets to below 500k/sec. However we reproduce the issue
> > locally on a machine thus eliminating the network card issue. We also
> > had tried with different ethernet cards and x-over cable.
> >
> >
> > We are using CentOS 4 and have tried both 4.1 and 4.2 (the latest
> > edition) 64 and 32 bit. We have tried ubuntu, gentoo, and vanilla
> > kernels. We have upgraded our BIOS to the latest and experimented with
> > different BIOS settings (from 'safe' to 'optimal' with many variants in
> > between.) We have tried it with ACPI switched off, with 4gb of RAM and
> > with 8gb of RAM. We have upgraded the BIOS to 3.04 & then 3.05. The
> > best we get is that under the ubuntu, gentoo, and a 2.4 kernel we can
> > see stable performance that is well below what we should be getting
> > ~20MiB/s.
> >
> > No matter what combination of configuration we try, we consistently see
> > this issue. We have even tried and LSI SATA controller w/ Tyan
> > motherboard and experienced the same issues.
> >
> > We moved the SATA controller to a Dell PE 1750 and experience none of
> > the slowdowns, consistent ly 45-50MiB/s performance with no erraticness
> > in speed or drops in performance.
> >
> > We suspect the issue is related to the combo of the Tyan mobo with the
> > SATA controller subsystem but need some assistance in further nailing
> > down the cause and solution to this issue.
> >
> > Let me know of any additional information that I can provide to assist
> > with the debugging of this issue.
> >
> > Thanks,
> > -asher
> >
>
>i. posting boot message would help.
>ii. Can you try vanilla 2.6.14 kernel? If it's sil m15w problem and
>your card is 3114 but not 3112, the problem should disappear on 2.6.14.
>
>--
>tejun
>-
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