On Wed, 2003-07-30 at 02:09, Seth Mos wrote:
> At 18:31 29-7-2003 -0700, Ravi Wijayaratne wrote:
> >Hi,
> >
> >We are seeing a %15 performance drop when we move from XFS 1.1 to 1.2.
> >Here are some of our particulars:
> >We have been testing the performance of Linux-2.4.19 and XFS 1.2 with
> >NetBench.
> >We compared the performance with that of Linux-2.4.18 and XFS 1.1.
> >We have been running Samba 3.0.
>
> The only problem I know of which is not exclusive to XFS (ext3 does this as
> well) is one on the read performance of 2.4.18 vs the 2.4.20 errata kernel.
>
> On 2.4.18-27 I get 170MB/sec read speed
> on 2.4.20-18 I get 80MB/sec read speed.
>
> the write speed stays consistent between these releases but the enormous
> drop in read speed is very strange. It appears to be present in the
> standard rh errata as well.
Try hdparm -a 512 /dev/hdx
http://marc.theaimsgroup.com/?l=linux-kernel&m=105830842018800&w=2
--
Cliff Wells, Software Engineer
Logiplex Corporation (www.logiplex.net)
(503) 978-6726 (800) 735-0555
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