"calcru: runtime went backwards" messages

 It is common to see kernel messages related to "calcru: runtime went backwards" in a FreeBSD VPS.  These messages are related to how your FreeBSD system is running in a fully virtualized environment and does not have a precise hardware clock for timekeeping.  These messages do not pose any significant problem and can safely be ignored.

We also recommend the following settings which will help reduce these messages:

1. Append the following line to /boot/loader.conf  and reboot (all automatically provisioned FreeBSD VMs already have this entry): 

kern.hz="100"

2. Enable NTP daemon.  Click here to view the knowledgebase article with instructions for this step.

 

If you have any other comments or suggestions, please submit a support ticket.

 

 

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