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Re: [Xen-devel] [xen-devel] Xen PMU support

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
  • Date: Wed, 20 Mar 2013 13:05:27 +0100
  • Cc: ææå <Arthur Chunqi Li> <yzt356@xxxxxxxxx>
  • Delivery-date: Wed, 20 Mar 2013 12:06:45 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

Am Mittwoch 20 März 2013, 19:44:27 schrieb æ??æ?¥å¥?:
> Hi all,
> I want to know if PMU in Xen HVM or PV is supported now? I have done a test
> that in the latest xen-unstable source, "perf" command cannot give right
> output in VMs. My CPU is Intel(R) Xeon(R) CPU E5620  @ 2.40GHz.

perf should be supported for HVM guests in the last xen-unstable source for
most Intel processors.
You have to add the 'vpmu' flag as hypervisor boot parameter. If you start
your HVM guest you should see a message in the hypervisor logs if your cpu
is not supported.


> Thanks,
> Arthur
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