runaway intr problems: powerd and/or hw.acpi.cpu.cx_lowest related

[Andriy Gapon]

on 23/08/2010 10:55 Doug Barton said the following:
> Meanwhile, with the combination of ULE, no powerd, and cx_lowest=C1 I was able
> to watch 2 movies streaming over flash, plus do backups to various USB drives,
> read mail, etc. etc. for several hours; all without a hiccup. So clearly (in my
> mind at least) there is a problem with powerd, at least in the situation like
> mine where there is IRQ contention for HPET. I forgot to mention that in my
> previous testing today I tried running just powerd (not changing cx_lowest) and
> I when intr started running away I could "solve" the problem by killing powerd.
> The intr process went back to normal, and I could go back to doing what I was
> doing without having to reboot again.


Speaking of which you seem to have too many powerd levels.
What cpufreq drivers are in use on your system?
Maybe you'd want to stick to just one of them?
E.g.:
http://lists.freebsd.org/pipermail/freebsd-stable/2010-March/055666.html

-- 
Andriy Gapon