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RE: [Xen-users] GPLPV driver Send performance

To: "Klaus Steinberger" <klaus.steinberger@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] GPLPV driver Send performance
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Fri, 4 Dec 2009 22:16:21 +1100
Cc: "Fajar A. Nugraha" <fajar@xxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
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Thread-topic: [Xen-users] GPLPV driver Send performance
> Hi James,
> 
> > Just out of interest, is the send being done to a physical machine
or
> > another VM? Offload is a bit of a funny thing... in my case I have
> 
> The test was from DomU to the hosting Dom0, but I did the test because
I had
> performance problems from DomU to a external physical machine.
> 
> 
> > problems when the packet goes from a Windows DomU running GPLPV with
> > offload or even Linux with offload onto a bridge in Dom0 and then
out a
> > vlan on a physical adapter. It looks like my network adapter doesn't
> 
> Uhh, it was a VLAN, probably that is the culprit?
> 

Could be, but if it went from DomU->Dom0 and didn't cross a physical
adapter then I wouldn't have thought so.

James

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