SW_WATCHDOG vs new eventtimer code
Andriy Gapon
avg at FreeBSD.org
Wed Sep 21 08:56:56 UTC 2011
on 21/09/2011 11:40 Alexander Motin said the following:
> It looks like your system was out for about 15 seconds or for some
> reason system uptime jumped 15 seconds forward. Have you done anything
> special at the moment or have you seen anything strange in system
> behavior?
Nope. I just looked away for a second :-)
> What timecounter are you using? I see you are using HPET
> eventtimer, but on what hardware (is it per-CPU or global)?
The timecounter is the new TSC-low.
The HPET eventtimer was global, I think. It is an ICH9-based system.
> Building kernel with KTR_SPARE2 ktrace enabled should help to collect
> valuable info about timers behavior before the crash.
I will try to debug this further using your suggestion.
Thank you!
--
Andriy Gapon
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