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Re: [Xen-users] Question about CPU usage between xen domains

  • To: "Christopher Isip" <cmisip@xxxxxxxxx>
  • From: "Todd Deshane" <deshantm@xxxxxxxxx>
  • Date: Mon, 26 May 2008 17:04:52 -0400
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Mon, 26 May 2008 14:05:35 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi Chris,

On Mon, May 26, 2008 at 8:59 AM, Christopher Isip <cmisip@xxxxxxxxx> wrote:
> If one domain uses 100% cpu use as reported by top, will this bog the other
> domains down?  Or is cpu use "comparmentalized", and the domain which has
> 100% cpu only uses 100% of its cpu slice?  I am thinking of turning on
> mythcommflag in a separate domU and I know it eats up all available cpu
> resources.

Based on on experience [1], the other domU should see little or no
degradation. Xen
does a good job at isolating the guests from each other in general and
does very well
on in term of CPU scheduling.

For more information on performance isolation of virtualization
systems see the reference [1]



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