[Bug 264775] acpi_thermal: passive cooling only throttles cpu0
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Date: Tue, 21 Jun 2022 06:15:12 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264775
rkoberman@gmail.com changed:
What |Removed |Added
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CC| |rkoberman@gmail.com
--- Comment #1 from rkoberman@gmail.com ---
I am seeing a slightly different case that MAY be a similar issue.
During a big build, I will often see all CPUs except cpu0 drop from full speed
(2101) to minimum (400). This includes the second thread on CPU0, which is
clearly nonsensical. The system then cools to about 45C and the fan speed drops
to 0. At that point, the system stays at 400. I can set CPU0 to 400 an then to
2010 and all CPUs show 2101, but often the system does not speed up.
I test by the trivial technique o building a small port, audio/taglib. It
should build in about 15 seconds, but, when the system is running slow it takes
about 2:08.
If the system remains slow, after some long time (many minutes) it will return
to full stream.
Clearly, something i really wrong. This has been happening since at least 13.0
and continues to the current 13.1 stable. The system is a Lenovo L15 which has
the problem of locking up when P-States are not disabled.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253288.
This may be related.
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