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[Xen-devel] Re: Xen & I/O in clusters - problems!

To: H�rd Bjerke <Havard.Bjerke@xxxxxxxxxxx>
Subject: [Xen-devel] Re: Xen & I/O in clusters - problems!
From: "Mark A. Williamson" <mark.williamson@xxxxxxxxxxxx>
Date: Fri, 15 Oct 2004 14:02:31 +0000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxxx, Rune.Johan.Andresen@xxxxxxxxxxx
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> Between two nodes running plain redhat EL3 with kernel 2.4.21-15.EL:
>
>  786.034 MByte/s
>
> Between two nodes each running only xen domain 0:
>
>  56.480 MByte/s

That's surprising - I'd have expected any performance problems to involve 
unpriv domains somehow.  We've never had any performance problems when just 
running domain 0, even when the code was still under development...

It'd be interesting to see your config file (I know it's just the default but 
it'd be interesting for comparison as there's no obvious reason for your 
problems).

Cheers,
Mark


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