Re: PROBLEM: Tyan s2822 and SATA slowness / erratic speeds kernel 2.6

We experience the same issue when using an LSI SATA controller and the Tyanmotherboard. In addition we did try vanilla 2.6.14.2 and experienced thesame slowdown issues.


-asher

<BLOCKQUOTE style='PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #A0C6E52px solid; MARGIN-RIGHT: 0px'><fontstyle='FONT-SIZE:11px;FONT-FAMILY:tahoma,sans-serif'><hr color=#A0C6E5size=1>From: Tejun Heo <[email protected]> To: Jones Joneser<[email protected]> CC: [email protected],[email protected],[email protected] Subject:Re: PROBLEM: Tyan s2822 and SATA slowness / erratic speeds kernel2.6 Date: Wed, 16 Nov 2005 13:57:02 +0900 MIME-Version:1.0 Received: from vger.kernel.org ([209.132.176.167]) byMC6-F11.hotmail.com with Microsoft SMTPSVC(6.0.3790.211); Tue, 15 Nov 200521:00:16 -0800 Received: ([email protected]) byvger.kernel.org via listexpandid S932296AbVKPE5M (ORCPT<rfc822;[email protected]>);Tue, 15 Nov 2005 23:57:12-0500 Received: ([email protected]) by vger.kernel.org idS932580AbVKPE5M(ORCPT <rfc822;linux-scsi-outgoing>);Tue, 15 Nov 200523:57:12 -0500 Received: from zproxy.gmail.com([64.233.162.197]:62641 "EHLO zproxy.gmail.com")by vger.kernel.orgwith ESMTP id S932579AbVKPE5L(ORCPT<rfc822;[email protected]>);Tue, 15 Nov 2005 23:57:11-0500 Received: by zproxy.gmail.com with SMTP id 13so1684427nznfor <[email protected]>; Tue, 15 Nov 2005 20:57:10 -0800(PST) Received: by 10.36.3.15 with SMTP id 15mr5939412nzc; Tue,15 Nov 2005 20:57:10 -0800 (PST) Received: from htj.dyndns.org ([221.139.199.105]) by mx.gmail.com with ESMTP id23sm199490nzn.2005.11.15.20.57.07; Tue, 15 Nov 2005 20:57:09 -0800(PST) Received: from [127.0.0.1] (htj.dyndns.org[127.0.0.1])(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))(Noclient certificate requested)by htj.dyndns.org (Postfix) with ESMTP idDC824184063;Wed, 16 Nov 2005 13:57:02 +0900 (KST) >Jones Joneserwrote: > > Machine: > > Tyan s2822G3NR-D > >Silicon Image, Inc. SiI 3114 > > SATA Drives: Western Digital 300gb/ seagate 80 gb > > > > Initially we thought we had anetwork issue because we were seeing a > > slowdown whentransferring files > 512Mb in size (by whatever method: > >rsync, cp, scp, etc.) between two of the Tyan servers, we see thefirst > > 512Mb go at a decent rate (tens of megabytes per second)and then the > > rate plummets to below 500k/sec. However wereproduce the issue > > locally on a machine thus eliminating thenetwork card issue. We also > > had tried with different ethernetcards and x-over cable. > > > > > > We are usingCentOS 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 experimentedwith > > different BIOS settings (from 'safe' to 'optimal' withmany variants in > > between.) We have tried it with ACPI switchedoff, with 4gb of RAM and > > with 8gb of RAM. We have upgraded theBIOS to 3.04 & then 3.05. The > > best we get is that underthe ubuntu, gentoo, and a 2.4 kernel we can > > see stableperformance that is well below what we should be getting > >~20MiB/s. > > > > No matter what combination ofconfiguration we try, we consistently see > > this issue. We haveeven tried and LSI SATA controller w/ Tyan > > motherboard andexperienced the same issues. > > > > We moved the SATAcontroller to a Dell PE 1750 and experience none of > > theslowdowns, consistent ly 45-50MiB/s performance with no erraticness >> in speed or drops in performance. > > > > We suspectthe issue is related to the combo of the Tyan mobo with the > >SATA controller subsystem but need some assistance in furthernailing > > down the cause and solution to this issue. >> > > Let me know of any additional information that I canprovide to assist > > with the debugging of this issue. >> > > Thanks, > > -asher > > > >i.posting boot message would help. >ii. Can you try vanilla 2.6.14kernel? If it's sil m15w problem and >your card is 3114 but not 3112,the problem should disappear on2.6.14. > >-- >tejun >- >To unsubscribe fromthis list: send the line "unsubscribe linux-scsi" in >thebody of a message to [email protected] >More majordomo info athttp://vger.kernel.org/majordomo-info.html </BLOCKQUOTE>



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References:
- Re: PROBLEM: Tyan s2822 and SATA slowness / erratic speeds kernel 2.6
 - From: Tejun Heo <[email protected]>

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