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From: Thierry Lacoste <th.lacoste@wanadoo.fr>
To: Chuck Swiger <cswiger@mac.com>
Date: Mon, 30 Oct 2006 19:59:37 +0100
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Cc: freebsd-questions@freebsd.org
Subject: Re: clock running too fast
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Thank you.

I tried TSC, ACPI-fast and i8254 but I still have the same problem.

Best regards,
Thierry.

On Sunday 29 October 2006 15:46, Chuck Swiger wrote:
> Thierry Lacoste wrote:
> > On one of my servers running 6.1-RELEASE-p10 I cannot keep the clok
> > synchronized using ntpd. AFAICS this is certainly because the clock
> > is running way too fast (about one second per minute).
> >
> > After I run ntpdate then ntpd the clock is drifting and /var/db/ntp.drift
> > contains 0.00.
> >
> > Is there a way to slow down the system clock (something like tickadj
> > under some linux distributions) ?
>
> Take a look at "sysctl kern.timecounter", and choose another clock from the
> list of choices (by setting kern.timecounter.hardware to something else in
> the list of choices).
>
> If you are using TSC now, especially on a dual-CPU system, try using
> ACPI-safe or i8254 instead.  If you are using the ACPI timecounter, try
> looking for a BIOS update for your hardware; perhaps that might fix the
> bogus clock.