From owner-freebsd-hackers  Wed Aug 22 19:45:30 2001
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To: Wilko Bulte <wkb@freebie.xs4all.nl>
Subject: Re: clock synchronization quality via NTP ? 
Cc: Thierry Herbelot <thierry@herbelot.com>, hackers@FreeBSD.ORG
In-reply-to: Your message of "Wed, 22 Aug 2001 22:50:25 +0200."
		<20010822225025.A33131@freebie.xs4all.nl> 
References: <20010822225025.A33131@freebie.xs4all.nl>  <3B840C56.BDB7424D@herbelot.com> 
Date: Wed, 22 Aug 2001 20:45:24 -0600
From: Warner Losh <imp@harmony.village.org>
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In message <20010822225025.A33131@freebie.xs4all.nl> Wilko Bulte writes:
: On Wed, Aug 22, 2001 at 09:47:34PM +0200, Thierry Herbelot wrote:
: > Hello,
: > 
: > I know FreeBSD can be used with great success for timing solutions (at
: > least two core members do it ?).
: > 
: > has someone some performance data of the quality of system clock
: > synchronization, while using NTPd with a GPS reveiver and a hard 1PPS
: > signal ?
: > 
: > More precisely : is it reasonable to hope having a system clock not
: > farther from the GPS clock by more than 50 micro-seconds ?
: 
: Talk to Poul-Henning, he is the clock/time expert (phk@FreeBSD.org).
: Poul used to have some nice Web pages around on this subject but they
: were killed in a disk crash IIRC.

http://phk.freebsd.dk/rover.html used to be that URL...

Warner

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