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Date: Tue, 18 Mar 2008 21:36:07 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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To: Ghirai <ghirai@ghirai.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Warnings after overclock
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Ghirai wrote:
> Hello list,
> 
> I just overclocked my CPU a bit for the sake of it,
> from 2.3GHz to ~2.8GHz.
> 
> Everything is nice and stable, but after reboot i get this message:
> 
> calcru: runtime went backwards from 19330 usec to 16092 usec for pid 597 (hald-runner)
> calcru: runtime went backwards from 244138 usec to 203252 usec for pid 597 (hald-runner)
> calcru: runtime went backwards from 1345442 usec to 1122955 usec for pid 596 (hald)
> calcru: runtime went backwards from 10959 usec to 9124 usec for pid 596 (hald)
> ...

...so you mean everything is nice and stable except your system no 
longer has stable timecounting.

> I suspect it's got something to do with kern.timecounter.hardware;
> atm. it seems to be "ACPI-fast"; do i need to change it to TSC?

I suspect your overclocked CPU.

Kris