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Date: Wed, 09 Nov 2005 00:13:00 -0800
From: Nate Lawson <nate@root.org>
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To: Lev Serebryakov <lev@FreeBSD.org>
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Cc: freebsd-stable@FreeBSD.org
Subject: Re: 6.0 on VMWare 5.0: `calcru: negative runtime of -12728437 usec
 for pid 28 (irq17: lnc0)'
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Lev Serebryakov wrote:
> Hello freebsd-stable,
> 
>   FreeBSD 6.0 on VMWare 5.0 prints such messages every 3-4 minute.
>   Also, messages like
> 
> calcru: runtime went backwards from 40644816 to 40005944 usec for pid 3 (g_up)
> 
>   is shown routinely.
> 
>   timecounter is ACPI-safe, kernel is GENERIC one.
> 
>   5.4-STABLE on some virtual machine runs without such messages.
> 
>   And, hey, numbers are TOOOOOO big to be true, aren't they?

Try using TSC or i8254:
sysctl kern.MUMBLE.timecounter=TSC

(developers@ removed from cc:)

-- 
Nate