Re: Virtualization of the CPU Performance Monitoring Unit

[Lin Ming <mlin@ss.pku.edu.cn>]

On Tue, 2012-04-10 at 15:45 +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.

Thanks for the clarification.

I'll investigate this first.

> cheers,
> Marcus
> 
>