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Subject: Re: Memory performance on Serverworks GC-LE based system poor?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Dave Jones <davej@codemonkey.org.uk>
Cc: Martin Knoblauch <knobi@knobisoft.de>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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	<20021111005143.GA22055@suse.de>
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Date: 11 Nov 2002 01:33:30 +0000
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On Mon, 2002-11-11 at 00:51, Dave Jones wrote:
> On Mon, Nov 11, 2002 at 01:30:13AM +0100, Martin Knoblauch wrote:
> 
>  >  I have experienced extreme low STREAMS numbers (about 600 MB/sec for Triad) 
>  > on two dual CPU systems based on the ServerWorks GC-LE chipset (SuperMicro 
>  > P4DLR+ mainboard). Both systems had 2x2.4 GHz XEONs, 4GB of DDR memory and 
>  > were running kernel 2.4.18. I would usually expect STREAMS numbers of about 
>  > 2000 MB/sec for this kind of systems.
>  > 
>  > Does this ring any bells?
> 
> ISTR serverworks LE errata with MTRRs and write-combining.
> Whether this is biting you or not I can't say.

Write combining would really only bite graphics cards. The only other
performance errata I know about affects the CIOB20 earlier revisions
(vendor serverworks id 0x0006)


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