Date: Wed, 22 Aug 2001 20:45:24 -0600 From: Warner Losh <imp@harmony.village.org> To: Wilko Bulte <wkb@freebie.xs4all.nl> Cc: Thierry Herbelot <thierry@herbelot.com>, hackers@FreeBSD.ORG Subject: Re: clock synchronization quality via NTP ? Message-ID: <200108230245.f7N2jOW80551@harmony.village.org> In-Reply-To: Your message of "Wed, 22 Aug 2001 22:50:25 %2B0200." <20010822225025.A33131@freebie.xs4all.nl> References: <20010822225025.A33131@freebie.xs4all.nl> <3B840C56.BDB7424D@herbelot.com>
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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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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