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

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 28 Jun 2021 20:18:18 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781

--- Comment #17 from martin.stoyanov@vertalo.com ---
(In reply to Colin Percival from comment #14)

ec2-user@freebsd:~ $ sysctl kern.timecounter
kern.timecounter.tsc_shift: 1
kern.timecounter.smp_tsc_adjust: 0
kern.timecounter.smp_tsc: 1
kern.timecounter.invariant_tsc: 1
kern.timecounter.fast_gettime: 1
kern.timecounter.tick: 1
kern.timecounter.choice: i8254(0) ACPI-fast(900) HPET(950) TSC-low(1000)
dummy(-1000000)
kern.timecounter.hardware: TSC-low
kern.timecounter.alloweddeviation: 5
kern.timecounter.timehands_count: 2
kern.timecounter.stepwarnings: 0
kern.timecounter.tc.i8254.quality: 0
kern.timecounter.tc.i8254.frequency: 1193182
kern.timecounter.tc.i8254.counter: 5840
kern.timecounter.tc.i8254.mask: 65535
kern.timecounter.tc.ACPI-fast.quality: 900
kern.timecounter.tc.ACPI-fast.frequency: 3579545
kern.timecounter.tc.ACPI-fast.counter: 15311745
kern.timecounter.tc.ACPI-fast.mask: 16777215
kern.timecounter.tc.HPET.quality: 950
kern.timecounter.tc.HPET.frequency: 62500000
kern.timecounter.tc.HPET.counter: 1237447075
kern.timecounter.tc.HPET.mask: 4294967295
kern.timecounter.tc.TSC-low.quality: 1000
kern.timecounter.tc.TSC-low.frequency: 1426718697
kern.timecounter.tc.TSC-low.counter: 3076039010
kern.timecounter.tc.TSC-low.mask: 4294967295

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