On 27/04/20 19:30, Jim Mattson wrote: >>>> I would like to see performance data before enabling this >>>> unconditionally. >>> I wouldn't want this to be enabled unconditionally anyway, >>> because you need to take into account live migration to and from >>> processors that do not have APERF/MPERF support. >>> >>> Paolo >> I will add a kvm parameter to consider whether enable MPERF/APERF >> emulations, and make default value to false > > Wouldn't it be better to add a per-VM capability to enable this > feature? Yes, you it would be better to use KVM_ENABLE_CAP indeed. Paolo
