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?
