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Date:      Wed, 6 Nov 2002 13:39:11 +0000
From:      David Malone <dwmalone@maths.tcd.ie>
To:        Sameh Ghane <sw@anthologeek.net>
Cc:        freebsd-current@freebsd.org, phk@freebsd.org
Subject:   Re: time counter / time ticking or hardware issues
Message-ID:  <20021106133911.GA42972@walton.maths.tcd.ie>
In-Reply-To: <20021106122631.GA93442@anthologeek.net>
References:  <20021106122631.GA93442@anthologeek.net>

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On Wed, Nov 06, 2002 at 01:26:31PM +0100, Sameh Ghane wrote:
> Timecounter "i8254"  frequency 1193182 Hz
> Timecounter "TSC"  frequency 332755591 Hz
> CPU: AMD-K6(tm) 3D processor (332.76-MHz 586-class CPU)
>   Origin = "AuthenticAMD"  Id = 0x58c  Stepping = 12
>   Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX>
>   AMD Features=0xffffffff80000800<SYSCALL,3DNow!>

There seem to be a family of K6 motherboards on which the ACPI
timecounter runs fast by a factor of about two. I've been seeing
this since ACPI became the default on one motherboard. I get
around it by using the TSC instead:

	sysctl kern.timecounter.hardware=TSC

	David.

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