Subject: Re: CVS commit: src/sys/kern
To: Izumi Tsutsui <>
From: Perry E. Metzger <>
List: source-changes
Date: 08/06/2006 01:02:05
Izumi Tsutsui <> writes:
> wrote:
>> I was under the impression that for some counters with fixed
>> frequency, like the ACPI time register, that the frequency was
>> determined by specification. Am I mistaken on that?
> Usually crytal oscillators have 10~200 ppm tolerance
> (including temperature dependency), so lower digits
> (under ~100kHz on 1GHz CPU) are not so significant.
> I'm just afraid such not-so-meaningful digits might confuse
> some users.

I doubt it, but more importantly, it is important for debugging and
other purposes to know what the value decided at boot time was.