freebsd stable - Nov 2018 - high cpu irq load and slow boot after update from 10.4 to 11.2

On Mon, 26 Nov 2018 15:37:02 +0100 Gerrit K?hn <gerrit.kuehn at
aei.mpg.de>
wrote about Re: high cpu irq load and slow boot after update from 10.4 to
11.2:
> > Try switching to "HPET" in both cases and do not wait for
next disaster
> > but do it right now with sysctl command, reboot is not needed.
> > You can restore default settings any moment same way.
> > 
> > And see if the problem goes away.
> Ok, I did that, let's see what happens next (I guess I cannot declare
> victory until it's running stable for more than 4 weeks from now on).
> Thanks again!
The issue is back this morning: sys and irq load incredibly high, system
hardly usable anymore.
I guess it's time to try kern.eventtimer.periodic=1 now... should I do
that in addition to the timecounter setting to hpet, or revert that
one first?


cu
  Gerrit

On Thu, 29 Nov 2018 07:48:23 +0100 Gerrit K?hn <gerrit.kuehn at
aei.mpg.de>
wrote about Re: high cpu irq load and slow boot after update from 10.4 to
11.2:
> The issue is back this morning: sys and irq load incredibly high, system
> hardly usable anymore.
> I guess it's time to try kern.eventtimer.periodic=1 now... should I do
> that in addition to the timecounter setting to hpet, or revert that
> one first?
Nothing helps, rebooting now to get the system back online.
Any further ideas on how to debug this?


cu
  Gerrit