[Bug 256781] EC2 Nitro: TSC-low timecounter lags

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 19 Nov 2021 07:39:57 UTC

dwmw2@infradead.org changed:

           What    |Removed                     |Added
                 CC|                            |dwmw2@infradead.org

--- Comment #37 from dwmw2@infradead.org ---
The TSC shouldn't vary; I suspect what we're seeing here is an issue with the
i8253 PIT making the calibration go wrong.

Do you have a current way to switch back from kvmclock to TSC and test, that I
can experiment with and then include in regression tests please?

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