Re: kern/56322: Excessive clock drift

[David Holland <dholland-bugs%netbsd.org@localhost>]

On Fri, Jul 23, 2021 at 07:25:01AM +0000, Frank Kardel wrote:
 >  Did you mean to say HPET? I thought it was using TSC?

Er, yeah.

 >  I am interested in the value of kern.timecounter.choice like
 >  
 >  in the output below
 >  
 >  EXAMPLE:
 >  
 >  kern.timecounter.choice = TSC(q=3000, f=2200001000 Hz) 
 >  clockinterrupt(q=0, f=100 Hz) lapic(q=-100, f=25000000 Hz) hpet0(q=2000, 
 >  f=24000000 Hz) ACPI-Fast(q=1000, f=3579545 Hz) i8254(q=100, f=1193182 
 >  Hz) dummy(q=-1000000, f=1000000 Hz)
 >  kern.timecounter.hardware = TSC
 >  kern.timecounter.timestepwarnings = 1

kern.timecounter.choice = TSC(q=3000, f=3517182870 Hz) clockinterrupt(q=0, f=100 Hz) lapic(q=-100, f=200982000 Hz) i8254(q=100, f=1193182 Hz) dummy(q=-1000000, f=1000000 Hz)
kern.timecounter.hardware = i8254
kern.timecounter.timestepwarnings = 0

Other than the lapic entry, which doesn't appear to be particularly
interesting, no information that wasn't in the dmesg output.

(The hardware is now i8254 because I changed it; it started as TSC.)

-- 
David A. Holland
dholland%netbsd.org@localhost