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

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

29.11.2018 14:01, Gerrit K?hn wrote:
> 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?
Fill a PR and include exact output showing IRQs and their count numbers.