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RE: [Xen-devel] Support for CPU frequency scaling in Xen

  • To: "Niraj Tolia" <ntolia@xxxxxxxxx>, "Vahid Kazempour" <kazempour@xxxxxxxxx>
  • From: "Langsdorf, Mark" <mark.langsdorf@xxxxxxx>
  • Date: Wed, 4 Jun 2008 08:12:53 -0500
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Wed, 04 Jun 2008 06:14:13 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcjGCMxgKs8uvhVSQiuoM51crtBLigAO693w
  • Thread-topic: [Xen-devel] Support for CPU frequency scaling in Xen

> > Does Xen provide support for CPU frequency scaling?
> > If there exists such support, from which version they support it?
> In short, yes but YMMV. I saw a few patches on the list that added
> frequency scaling to the hypervisor itself but I don't know the
> current status for that. They should be in xen-unstable.

Currently, only Intel is supported in xen-unstable.  
There's a patch under development for AMD Phenom and
3rd generation Operton (the Barcelona quad-cores) but I
haven't sent it upstream.

Anyone who has a quad-core AMD processor and who is
interested in testing is welcome to email me for the

-Mark Langsdorf
Operating System Research Center

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