Re: KVM PMU virtualization

Peter Zijlstra
2010-02-26T15:08:29Z

On Fri, 2010-02-26 at 16:54 +0200, Avi Kivity wrote:
> On 02/26/2010 04:27 PM, Peter Zijlstra wrote:
> > On Fri, 2010-02-26 at 15:55 +0200, Avi Kivity wrote:
> >
> >> That actually works on the Intel-only architectural pmu. I'm beginning
> >> to like it more and more.
> >>
> > Only for the arch defined events, all _7_ of them.
> >
>
> That's 7 more than what we support now, and 7 more than what we can
> guarantee without it.

Again, what windows software uses only those 7? Does it pay to only have
access to those 7 or does it limit the usability to exactly the same
subset a paravirt interface would?