Re: KVM PMU virtualization

Avi Kivity
2010-02-26T15:13:07Z

On 02/26/2010 05:08 PM, Peter Zijlstra wrote:
>> 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?
>

Good question. Would be interesting to try out VTune with the non-arch
pmu masked out.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.