On Wed, Apr 29, 2020 at 01:46:36PM +0800, Li RongQing wrote: > Guest kernel reports a fixed cpu frequency in /proc/cpuinfo, > this is confused to user when turbo is enable, and aperf/mperf > can be used to show current cpu frequency after 7d5905dc14a > "(x86 / CPU: Always show current CPU frequency in /proc/cpuinfo)" > so we should emulate aperf mperf to achieve it > > the period of aperf/mperf in guest mode are accumulated as > emulated value, and add per-VM knod to enable emulate mperfaperf > > diff v1: > 1. support AMD > 2. support per-vm capability to enable Would it make sense to provide a pass-through APERF/MPERF for KVM_HINTS_REALTIME ? Because that hint guarantees we have a 1:1 vCPU:CPU binding and guaranteed no over-commit.
