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RE: [Xen-users] Very bad network performance between domU and dom0

To: "Petersson, Mats" <Mats.Petersson@xxxxxxx>, "Klaus Schmidinger" <Klaus.Schmidinger@xxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] Very bad network performance between domU and dom0
From: "JHJE (Jan Holst Jensen)" <jhje@xxxxxxxxxxxxxxx>
Date: Thu, 25 Jan 2007 14:37:51 +0100
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Thread-topic: [Xen-users] Very bad network performance between domU and dom0
> The best solution is to use the para-virtual drivers - these 
> should (in theory at least) give you about the same performance as the

> para-virtual kernel does on Xen, because it's using the same method. 
> For linux-2.6, those are available in <xen source
> directory>/unmodified_drivers. The README file in that directoy tells
> you how to build these drivers. It's easiest if you do this ON the
> target-system. 
> There are drivers for Windows as well, but those are not available in
> source-form, but I believe XenExpress contains drivers for Windows if
> you want to get those. 

I can confirm that XenExpress contains those. The network driver reduced
ping response time on a HV Win2003 Server VM from 7-8 ms to less than 1
ms, so it gives a huge performance boost.

-- Jan Holst Jensen, Novo Nordisk A/S, Denmark

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