high cpu irq load and slow boot after update from 10.4 to 11.2

[Eugene Grosbein]

29.11.2018 14:01, Gerrit Kühn wrote:

> On Thu, 29 Nov 2018 07:48:23 +0100 Gerrit Kühn <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.