https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245597

            Bug ID: 245597
           Summary: TSC
           Product: Base System
           Version: 11.3-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: [email protected]
          Reporter: [email protected]

Kernel clock on FreeNAS running FreeBSD 11.3-U2 on Xeon D-1528 SuperMicro
SM-X10SDV-6C+-TLN4F runs about 3 times slower than it should when using
TSC-low. Setting kern.timecounter.hardware=HPET fixes the issue.

I wonder if this is related to others reporting TSC-low problems:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244705
https://forums.freebsd.org/threads/freebsd-clock-drift.71277/
https://forums.freebsd.org/threads/tsc-low-as-timecounter-slows-system-clock-by-a-factor-of-4.68619/

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