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| author | Andriy Gapon <avg@FreeBSD.org> | 2018-05-25 07:33:20 +0000 |
|---|---|---|
| committer | Andriy Gapon <avg@FreeBSD.org> | 2018-05-25 07:33:20 +0000 |
| commit | 279be68bfdf69ef764201a4adf9d689074a70d63 (patch) | |
| tree | 9393a3233d7e2088969128e0cf3a75da0014fbcf /share/misc/committers-ports.dot | |
| parent | 620b779158880a4c5c1e84cca36ebe3b3801cceb (diff) | |
re-synchronize TSC-s on SMP systems after resume, if necessary
The TSC-s are checked and synchronized only if they were good
originally. That is, invariant, synchronized, etc.
This is necessary on an AMD-based system where after a wakeup from STR I
see that BSP clock differs from AP clocks by a count that roughly
corresponds to one second. The APs are in sync with each other. Not
sure if this is a hardware quirk or a firmware bug.
This is what I see after a resume with this change:
SMP: passed TSC synchronization test after adjustment
acpi_timer0: restoring timecounter, ACPI-fast -> TSC-low
Reviewed by: kib
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D15551
Notes
Notes:
svn path=/head/; revision=334204
Diffstat (limited to 'share/misc/committers-ports.dot')
0 files changed, 0 insertions, 0 deletions