Bhyve Clock Drift

[-MG-]

One of my VMs runs a program that relies on being in-sync with internet time. I think its well known that Bhyve has a weakness here. I was wondering what others have done?

I have been using a program called Dimension 4 that is freeware and have it updating every 3 or so minutes. If I let it go to 15 minutes, it finds a correction of around ~1000ms. Which isn't terrible, but I would like it to be right on. Setting it to every 3 minutes keeps it to around ~100ms difference which is negligible.

Is this the best solution for this?

 

[kdragon75]

So you not just using ntpd with a cron job? I guess you never said what the guest OS was so it's hard to offer advice.

 

[-MG-]

Sorry. Windows 10

 

[kdragon75]

Sorry. Windows 10

I'm sure there is a reg key or some way to tweak the built in ntp client frequency. As you know bhyve has no guest tools like virtual box or VMware.

 

[acquacow]

All hypervisors have clock drift issues, this isn't anything unique to bhyve.

Sync your clock to internet time or a local NTP server frequently.