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Re: [Xen-users] Xen Performance

  • To: Xen User-List <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: Adam Wead <awead@xxxxxxxxxxx>
  • Date: Mon, 1 Jun 2009 23:04:13 -0400
  • Delivery-date: Mon, 01 Jun 2009 20:05:02 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

On Jun 1, 2009, at 8:43 PM, Luke S Crawford wrote:

Also note, I've seen better worst-case performance by giving each VM fewer
VCPUs, and the xen guys are not kidding about dedicating a core to the
Dom0. setting cpus="1-7" in your xm config file (assuming an 8 core box)
and giving dom0 only 1 vcpu makes a world of difference on heavily
loaded boxes.

This may be a dumb question, but is that any different from or the same as setting "dom0-cpus 1" in the xend-config.sxp file? Are you specifying "cpus=1-7" in the guest's config or the Xen daemon's config?

thanks in advance for clearing up my confusion,


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