RE: Memory performance on Serverworks GC-LE based system poor?

From: Manish Lachwani (manish@Zambeel.com)
Date: Sun Nov 10 2002 - 20:37:37 EST

I, too get 1600 using the Force 4203 motherboard with GC-LE chipset. Same
CPU and RAM ...

Thanks
Manish

-----Original Message-----
From: Craig Whitmore [mailto:linuxkernel@orcon.net.nz]
Sent: Sunday, November 10, 2002 5:23 PM
To: Alan Cox; Dave Jones
Cc: Martin Knoblauch; Linux Kernel Mailing List
Subject: Re: Memory performance on Serverworks GC-LE based system poor?

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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