NetBSD-Bugs archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

Re: kern/56322: Excessive clock drift

Did you mean to say HPET? I thought it was using TSC?

I am interested in the value of kern.timecounter.choice like

in the output below


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


On 07/23/21 01:35, David Holland wrote:
The following reply was made to PR kern/56322; it has been noted by GNATS.

From: David Holland <>
Subject: Re: kern/56322: Excessive clock drift
Date: Thu, 22 Jul 2021 23:30:32 +0000

  On Thu, Jul 22, 2021 at 03:05:01PM +0000, Frank Kardel wrote:
   > So I had to propose the next known workable alternative instead of
   > timecounters that haven't been detected :-). HPET is sometimes
   > disabled in BIOS.
Like I said, I'll check that next time I reboot this machine, which
  isn't ordinarily very often.
> So far we do not know the output of "sysctl kern.timercounter". Like I already said, it was using the bad HPET. --
  David A. Holland

Home | Main Index | Thread Index | Old Index