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From: "Craig Whitmore" <linuxkernel@orcon.net.nz>
To: "Alan Cox" <alan@lxorguk.ukuu.org.uk>,
       "Dave Jones" <davej@codemonkey.org.uk>
Cc: "Martin Knoblauch" <knobi@knobisoft.de>,
       "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
References: <200211110130.13943.knobi@knobisoft.de> <20021111005143.GA22055@suse.de> <1036978410.2919.16.camel@irongate.swansea.linux.org.uk>
Subject: Re: Memory performance on Serverworks GC-LE based system poor?
Date: Mon, 11 Nov 2002 14:22:39 +1300
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I get 1600 on a similar machine but with a Intel SHG2 motherboard
(ServerWorks GC LE Chipset as well) (Same RAM + Processors)
Maybe not a very good Motherboard you have?

Thanks
Craig

> >
> >  >  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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