* Re: PROBLEM: Tyan s2822 and SATA slowness / erratic speeds kernel 2.6
2005-11-16 4:57 ` Tejun Heo
@ 2005-11-16 18:21 ` Jones Joneser
0 siblings, 0 replies; 3+ messages in thread
From: Jones Joneser @ 2005-11-16 18:21 UTC (permalink / raw)
To: htejun; +Cc: linux-ide, linux-scsi, linux-kernel
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
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From: <i>Tejun Heo <htejun@gmail.com></i><br>To: <i>Jones Joneser
<joneserstein@hotmail.com></i><br>CC: <i>linux-ide@vger.kernel.org,
linux-scsi@vger.kernel.org,linux-kernel@vger.kernel.org</i><br>Subject:
<i>Re: PROBLEM: Tyan s2822 and SATA slowness / erratic speeds kernel
2.6</i><br>Date: <i>Wed, 16 Nov 2005 13:57:02 +0900</i><br>MIME-Version:
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DC824184063;Wed, 16 Nov 2005 13:57:02 +0900 (KST)</i><br>>Jones Joneser
wrote:<br>> > Machine:<br>> > Tyan s2822G3NR-D<br>> >
Silicon Image, Inc. SiI 3114<br>> > SATA Drives: Western Digital 300gb
/ seagate 80 gb<br>> ><br>> > Initially we thought we had a
network issue because we were seeing a<br>> > slowdown when
transferring files > 512Mb in size (by whatever method:<br>> >
rsync, cp, scp, etc.) between two of the Tyan servers, we see the
first<br>> > 512Mb go at a decent rate (tens of megabytes per second)
and then the<br>> > rate plummets to below 500k/sec. However we
reproduce the issue<br>> > locally on a machine thus eliminating the
network card issue. We also<br>> > had tried with different ethernet
cards and x-over cable.<br>> ><br>> ><br>> > We are using
CentOS 4 and have tried both 4.1 and 4.2 (the latest<br>> > edition)
64 and 32 bit. We have tried ubuntu, gentoo, and vanilla<br>> >
kernels. We have upgraded our BIOS to the latest and experimented
with<br>> > different BIOS settings (from 'safe' to 'optimal' with
many variants in<br>> > between.) We have tried it with ACPI switched
off, with 4gb of RAM and<br>> > with 8gb of RAM. We have upgraded the
BIOS to 3.04 & then 3.05. The<br>> > best we get is that under
the ubuntu, gentoo, and a 2.4 kernel we can<br>> > see stable
performance that is well below what we should be getting<br>> >
~20MiB/s.<br>> ><br>> > No matter what combination of
configuration we try, we consistently see<br>> > this issue. We have
even tried and LSI SATA controller w/ Tyan<br>> > motherboard and
experienced the same issues.<br>> ><br>> > We moved the SATA
controller to a Dell PE 1750 and experience none of<br>> > the
slowdowns, consistent ly 45-50MiB/s performance with no erraticness<br>>
> in speed or drops in performance.<br>> ><br>> > We suspect
the issue is related to the combo of the Tyan mobo with the<br>> >
SATA controller subsystem but need some assistance in further
nailing<br>> > down the cause and solution to this issue.<br>>
><br>> > Let me know of any additional information that I can
provide to assist<br>> > with the debugging of this issue.<br>>
><br>> > Thanks,<br>> > -asher<br>> ><br>><br>>i.
posting boot message would help.<br>>ii. Can you try vanilla 2.6.14
kernel? If it's sil m15w problem and<br>>your card is 3114 but not 3112,
the problem should disappear on
2.6.14.<br>><br>>--<br>>tejun<br>>-<br>>To unsubscribe from
this list: send the line "unsubscribe linux-scsi" in<br>>the
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