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[Xen-devel] Re: Poor performance on HVM (kernbench)

  • To: "xen-devel mailing list" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Todd Deshane" <deshantm@xxxxxxxxx>
  • Date: Wed, 10 Sep 2008 17:22:32 -0400
  • Cc: Muli Ben-Yehuda <MULI@xxxxxxxxxx>, Anthony Liguori <aliguori@xxxxxxxxxx>
  • Delivery-date: Wed, 10 Sep 2008 14:22:53 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

As an update, Xen HVM on Xen 3.2 on Ubuntu 8.04 from packages:

Average Optimal load -j 4 Run (std deviation):
Elapsed Time 954.4 (4.95457)
User Time 441.744 (2.56251)
System Time 506.018 (7.45156)
Percent CPU 99 (0)
Context Switches 160222 (1113.68)
Sleeps 37604.8 (182.796)

This is actually more what would be expected of Xen 3.2 right?

Xen 3.3 should be an improvement with shadow3 right?

Should I need to adjust the shadow_memory parameter for the guest?

I'm going to try Xen 3.2.1 from source next.


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