Hello,
I am facing an issue where the detected CPU frequencies in KVM guests are incorrect.
I am using the new Core i9 7900x with base clock 3.3GHz with "host-passthrough".
Both Win10 and Linux guests incorrectly detect 3.45GHz for some reason.
The workaround I have found is to temporarily switch to use HPET clocksource in the HOST
before starting the VM. This makes the VMs correctly detect a 3.3GHz CPU. Then I can
safely switch back to TSC in the VM HOST.
This mostly does not impact much for day to day use. The only reproducible bug I can find
with an incorrect CPU frequency is playing Bink videos that come with PC games. If I play
any Bink video cut scene from the 2013 Tomb Raider game with the incorrect CPU frequency,
the video plays a little slower than intended which results in audio cut out once in a
while so that the video can "catch up" to the audio.
Anyone having experiences with similar issues?