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Date: Sat, 29 Nov 2003 13:47:55 +0900
From: YONETANI Tomokazu <qhwt@myrealbox.com>
To: "Marc G. Fournier" <scrappy@hub.org>
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cc: freebsd-current@freebsd.org
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cc: Kris Kennaway <kris@obsecurity.org>
Subject: Re: Time jumping on both 4.x and 5.x ...
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Hello.

On Sat, Nov 29, 2003 at 12:36:22AM -0400, Marc G. Fournier wrote:
> > What hardware, kernel configuration, etc?  Do you have a misconfigured
> > ntpd/timed that is manually flapping the time around?
> 
> Hardware for the above is a Dual-Xeon, 4Gig of RAM, and about 421
> processes running on it currently ... kernel config is at the bottom, but
> I don't think there is anything 'abnormal' about it ... and note that I've
> had others be able to reproduce the problem on both 4.x and 5.x systems
> ...
> 
> as to ntpd/timed ... don't run either ... run ntpdate twice a day (11:59
> and 23:59), but that is it as far as playing with the clock is concerned
> ...

What does `sysctl kern.timecounter' show? Also, does changing
kern.timecounter.hardware (TSC, i8254, ACPI-safe, ...) affect the
results from your test program?