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HEADS-UP: ACPICA updated (again)
I have just updated ACPICA to the latest and greatest. There has again been
some sweeping changes, so please send-pr(1) if you observe any regressions.
More specifically, big changes have occured in the interrupt handling and
its relation to acpiec(4). I take this opportunity to note some sysctl(8)
variables that have been added:
$ sysctl hw.acpi.stat
hw.acpi.stat.gpe = 20541
hw.acpi.stat.sci = 20541
hw.acpi.stat.fixed = 0
hw.acpi.stat.method = 3963
* If a system experiences ACPI-related "interrupt storms", this should be
seen in the 'hw.acpi.stat.sci' counter. It measures the amount of
so-called SCI interrupts.
* On the other hand, if there would be a problem in dispatching the
interrupts, there should be a relatively big difference between
'hw.acpi.stat.sci' and 'hw.acpi.stat.gpe'.
* If there are problems in the generation of interrupts and ACPI events,
neither counter should increase when for instance the AC adapter is
* Finally, some extraordinarily large changes in 'hw.acpi.stat.method'
probably indicate some problems as well.
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