Re: Virtualization of the CPU Performance Monitoring Unit

[Konrad Rzeszutek Wilk <konrad@darnok.org>]

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.

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

> cheers,
> Marcus
> 
> 
> 
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