On 2020-03-03 07:43, mabi wrote:
> Hello,
>
> I am running an OpenBSD 6.6 VMM server with a few virtual machines also running 6.6 and noticed that one of them which is running Dovecot 2.3.9 package outputs the following warning every few 10-15 seconds:
>
> dovecot: imap: Warning: Time jumped forwards 28.294585 seconds
>
> It looks like there is a time issue on that VM although I am running the default ntpd of OpenBSD 6.6 and I have added the following parameter into my /etc/sysctl.conf on that VM:
>
> kern.timecounter.hardware=tsc
>
> Is there anything else I can do to avoid this time issue in my VM?
>
> Best regards,
> Mabi
>
The clocks are basically broken on vmm. The pvclock stuff is definitely
an improvement, but it's still not there. There's still a ways to go
before we have proper, reasonably accurate clocks for vmm guests.
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