RE: [Xen-users] Slow Network Performance on GPLPV 9.12-pre13

To:	"Mark Pace" <pace@xxxxxxxxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject:	RE: [Xen-users] Slow Network Performance on GPLPV 9.12-pre13
From:	"James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date:	Fri, 17 Apr 2009 09:46:20 +1000
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Thread-topic:	[Xen-users] Slow Network Performance on GPLPV 9.12-pre13

> 
> I've got a Windows 2003 32 bit virtual running on Xen 3.3.1, with dual
Quad
> Intel Xeon E5345@xxxxxxx  I'm having trouble getting more than a few
Mbps out
> of the system.  The drivers say that I'm running Xen-Net, not the
Realtek.
> The PV drivers seem happy for the hard drives on the system as well.
I've got
> ioemu removed from the vif line.
> 
> Any suggestions?
> 

How are you testing performance? And are you measuring from DomU->Dom0
or DomU->external host?

If the latter, then your network adapter may not support TCP task
offload (checksum / large send), although if that was the case I would
expect that your performance would be kbits not mbits...

James


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RE: [Xen-users] Slow Network Performance on GPLPV 9.12-pre13