Date: Thu, 21 Apr 2016 08:25:29 -0700 From: Adrian Chadd <adrian.chadd@gmail.com> To: Johannes Dieterich <dieterich.joh@gmail.com> Cc: "freebsd-acpi@freebsd.org" <freebsd-acpi@freebsd.org> Subject: Re: high acpi_task load Message-ID: <CAJ-VmomZGPioQyFKOxcZYHXnx1CAXjxCYReTjyrBk-sZq-WALQ@mail.gmail.com> In-Reply-To: <CABquGzWdoEvFogfZdUsva1nxSXY4xk4Wv=97udDbNt8vX%2Bw%2BZA@mail.gmail.com> References: <CABquGzWdoEvFogfZdUsva1nxSXY4xk4Wv=97udDbNt8vX%2Bw%2BZA@mail.gmail.com>
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What's the value of sc->tz_zone.tsp ? -a On 21 April 2016 at 07:46, Johannes Dieterich <dieterich.joh@gmail.com> wrote: > Dear all, > > I have for a long time observed a very high system load (seemingly > erratic) on my Elitebook 745 G3. I am finally able to reproduce the > behavior and would love input on how to solve it. > > If the laptop is attached to the docking station, acpi_task processes > are eating up an entire core worth of CPU time, thereby disallowing > the system to ever get to idle states with temperature and load issues > associated. > > This is in so far reprodroducable as that locking it in at runtime > causes these processes to appear on top -SH, disconnecting at runtime > causes them to disappear. > > Inspecting a core dump generated during high load seems to point to > ACPI's thermalzone: > > #5 0xffffffff803b0a97 in acpi_tz_cooling_thread (arg=<value optimized out>) > at /usr/src/sys/dev/acpica/acpi_thermal.c:1162 > #6 0xffffffff809ec8e4 in fork_exit ( > callout=0xffffffff803b0620 <acpi_tz_cooling_thread>, > arg=0xfffff800055f9a00, frame=0xfffffe043f590a40) > > This is a timer: tsleep(&sc->tz_cooling_proc, PZERO, "cooling", hz * > sc->tz_zone.tsp / 10); > > > As I reported earlier, the thermal zones are very broken on this > notebook. However, it surprises me that this would a) have such an > impact and b) only when connected to a docking station. > > Any input/ideas are appreciated! Happy to test things. > > Johannes > _______________________________________________ > freebsd-acpi@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-acpi > To unsubscribe, send any mail to "freebsd-acpi-unsubscribe@freebsd.org"
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