Re: sudden appearance of timekeeping problems with netbsd-8 just after 8.1

[mlelstv%serpens.de@localhost (Michael van Elst)]

gdt%lexort.com@localhost (Greg Troxel) writes:

>  -timecounter: Timecounter "ACPI-Safe" frequency 3579545 Hz quality 900
>  +timecounter: Timecounter "ACPI-Fast" frequency 3579545 Hz quality 1000

>  -timecounter: Timecounter "TSC" frequency 2800071320 Hz quality 3000
>  +timecounter: Timecounter "TSC" frequency 3920113160 Hz quality 3000

That looks like a non-invariant TSC that changes with the "turbo" mode
of the CPU. The interesting part is the 3.9GHz number, according to Intel
your CPU can only go up to 3.06GHz.


>I then set:
>  kern.timecounter.hardware = hpet0
>and things seem ok, at least after 10 minutes.

That's what to do, you can also use the ACPI timer.


-- 
-- 
                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."