Found this today - I will copy it here and also make a post - had some VM’s throwing TONS of these errors:
kernel: Clocksource tsc unstable (delta = 131717343 ns). Enable clocksource failover by adding clocksource_failover kernel parameter.
Come to find out it’s a bug (CentOS or Microsoft I don’t know…) that occurs when the VM is Live-Migrated - it actually hung a machine this morning which is why I found out about it - went and looked through all my running machines and it was occurring on 7 of them - the clock “De-Stabilizes” during the migration.
Simple solution - add this to /boot/grub/grub.conf and reboot when you can:
clocksource_failover=acpi_pm
Put it at the end of the kernel line as an option and then reboot.
Here is the original article: