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Re: [Xen-devel] Virtualization of the CPU Performance Monitoring Unit

On Wed, 2012-04-11 at 10:00 -0400, Konrad Rzeszutek Wilk wrote:
> On Tue, Apr 10, 2012 at 03:45:30PM +0100, Marcus Granado wrote:
> > On 08/04/12 07:48, Lin Ming wrote:
> > >>2. The PMU project description in the wiki is vague. I know HVM guests
> > >>support virtualized PMU. Please check vpmu.c files in /hvm, /svm, and /vmx
> > >>directories. You better ask mentors for details (maybe this is XCP
> > >>specific?).
> > Yes, the description is vague, we should update the page. The idea was 
> > to enable users to run hardware profilers in dom0 and in any domU, PV or 
> > HVM. This would include implementing what is missing for dom0/PV 
> > domains, and to confirm in HVM domains that profilers such as oprofile, 
> > hwpmc, intel performance counter monitor at least are running without 
> > problems in the existing vPMU implementation. The original idea was to 
> > add support to XCP, but please feel free to add support to xen-unstable 
> > and the latest linux kernel; XCP will use those at some point.
> Hey Marcos,
> I think we (you, Lin and me) should talk - if Lin is very interested in this,
> it might make sense to focus first on the existing supported 'perf' framework
> that Linux has - instead of the oprofile variant.

Yes, I'm interested.

> Lin, Marcos, what day/time would work for an IRC meeting on
> irc.freenode.net?

I'm on ##xen now with nick name "mlin".

10pm to 12pm(Shanghai, China time) is OK for me.

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