Udo van den Heuvel udovdh at xs4all.nl
Sat Apr 13 13:34:50 UTC 2019

On 13-04-19 15:29, Achim Gratz via devel wrote:
> Udo van den Heuvel via devel writes:
>> Fedora 29, kernel.org 4.19.30. (my compile)
> Is this a "tickless" kernel perhaps?  If so, try "nohz=off" on the
> kernel command line in the boot manager and see if that helps.

# grep HZ .config|grep -v ^#

tickless does not go with PPS support...

>> AMD Ryzen 5 2400G with Radeon Vega Graphics
> While Raven Ridge should fully work with 4.19, there were mutiple fixes
> for covering all sorts of things in later kernels.  I'm not sure how
> many of these got backported by the Fedora folks, 

My kernel is from kernel.org and compiled by me.

> the latest BIOS installed.

I need faster memory for later BIOS. Perhaps later this year.

>> clocksource is fixed at hpet since the previous situations where clock
>> sync was weird/gone/etc.
> That likely wasn't your real problem then, and switching to HPET just
> has made it less easy to detect.

What /was/ the problem in that case?
With tsc there was no real sync to pps.
With hpet we do have sync to pps.


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