From owner-freebsd-stable@FreeBSD.ORG  Tue Dec  7 03:07:05 2004
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Date: Mon, 6 Dec 2004 19:07:05 -0800 (PST)
From: Doug White <dwhite@gumbysoft.com>
To: Arjan Van Leeuwen <avleeuwen@gmail.com>
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Subject: Re: Timecounter problems on 5.3 - things take twice as long
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On Mon, 6 Dec 2004, Arjan Van Leeuwen wrote:

>
> OK, here it is:
>
> interrupt                          total       rate
> irq1: atkbd0                           2          0
> irq6: fdc0                            10          0
> irq8: rtc                        1140653        127
> irq13: npx0                            1          0
> irq16: atapci0                    129099         14
> irq21: rl0                        345707         38
> irq24: fwohci0                         1          0
> irq28: sym0                           30          0
> irq29: sym1                           30          0
> irq31: fxp0                       140237         15
> irq0: clk                        4456164        499
> Total                            6211934        696
>
> This is after 2.5 hours uptime.

The rate on 'clk' should be 1000, so it looks like your system doesn't
like HZ=1000.  Try sticking this in loader.conf and rebooting:

kern.hz="100"

If that works then its like your motherboard has Issues(tm).

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org