[xen-devel] Xen PMU support

[xen-devel] Xen PMU support

[李春奇 <Arthur Chunqi Li>]

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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.

Thanks,
Arthur

-- 
Arthur Chunqi Li
Department of Computer Science
School of EECS
Peking University
Beijing, China

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Re: [xen-devel] Xen PMU support

[Dietmar Hahn]

Am Mittwoch 20 März 2013, 19:44:27 schrieb 李春奇:
> 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.

Dietmar.

> 
> Thanks,
> Arthur
> 
> 
-- 
Company details: http://ts.fujitsu.com/imprint.html

Re: [xen-devel] Xen PMU support

[George Dunlap]

On Wed, Mar 20, 2013 at 11:44 AM, 李春奇 <Arthur Chunqi Li>
<yzt356@gmail.com> wrote:
> 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.

Googling for "xen vpmu" turns up this page, which has some basics:

http://wiki.xen.org/wiki/Xen_Profiling:_oprofile_and_perf

Strangely though, googling for "Xen PMU" doesn't seem to be as
useful... maybe we need to add some more tags. :-)

 -George

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