Thursday, August 29, 2019

Re: VM CPU usage with TSC timecounter

On Thu, Aug 29, 2019 at 10:29:40PM +0100, Oriol Demaria wrote:
> I have been following the patching of the TSC. So I don't have problems on
> the Ryzen now using TSC with the mouse and so on, but I have a problem with
> the vms. The CPU maxes out on the Ryzen 5 (on Intel is fine) when I run a vm
> (debian).
>
> But when I change the timecounter back to acpihpet0 and restart vmd, the CPU
> usage is normal again. Does anyone else has this problem?
>
> Regards.
>
> --
> Oriol Demaria
> 2FFED630C16E4FF8
>

40400 _vmd 10 0 8195M 505M idle fsleep 1:35 1.46% vmd

Not here. That's an ubuntu19 vm on Ryzen 7.

Does this happen all the time or is it random? We do have a longstanding
well known bug where a VM can get stuck and spin to 100%, that's unrelated
to TSC though.

-ml

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