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Re: [Xen-devel] Report on Virtualization in Clusters

To: Håvard Bjerke <havarbj@xxxxxxxxxxx>, runejoha@xxxxxxxxxxx
Subject: Re: [Xen-devel] Report on Virtualization in Clusters
From: Jacob Gorm Hansen <jacobg@xxxxxxx>
Date: Fri, 26 Nov 2004 11:44:03 +0100
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Håvard Bjerke wrote:
Rune and I just finished writing a report on using virtualization with Xen in 
clusters, with focus on network performance. You may download it from 

We hope you find it interesting!

Yes, very interesting. Good work.

It seems from your tests without interrupt coalescing that Xen has a higher interrupt-handling overhead than native Linux. I suppose that with the new IO model, Xen needs to flush the TLBs for every interrupt that arrives. Do you think this is the reason for the overhead, or are the performance problems only due to your hardware being badly supported by Xen?


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