From owner-freebsd-current Fri Mar 5 11:53:35 1999 Delivered-To: freebsd-current@freebsd.org Received: from phk.freebsd.dk (phk.freebsd.dk [212.242.40.153]) by hub.freebsd.org (Postfix) with ESMTP id 192A315211 for ; Fri, 5 Mar 1999 11:53:32 -0800 (PST) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.40.131]) by phk.freebsd.dk (8.9.1/8.8.8) with ESMTP id UAA17770 for ; Fri, 5 Mar 1999 20:53:14 +0100 (CET) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.9.2/8.9.2) with ESMTP id UAA08403 for ; Fri, 5 Mar 1999 20:53:06 +0100 (CET) (envelope-from phk@critter.freebsd.dk) To: current@freebsd.org Subject: NTP nanokernel support (experimental) From: Poul-Henning Kamp Date: Fri, 05 Mar 1999 20:53:06 +0100 Message-ID: <8401.920663586@critter.freebsd.dk> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG http://www.freebsd.org/~phk/x.nanokernel.gz contains patches relative to -current to implement the new "nanokernel" PLL from Dave Mills. This only works with a ntpd v4, suggest 4.92c or better from: ftp://ftp.eecis.udel.edu/pub/ntp It does still not support the hardpps()/PPS_SYNC support, that will come later. Make sure to configure/make your ntpd-4 from scratch to gain advantage of the new resolution, simple recompilation may not be enough. (You also need to get timex.h from /sys/sys to /usr/include/sys. Make world recommended). You should now be truly limited to hardware performance (xtal tempco and interrupt jitter). Please send comments and observations, both positive AND negative. I am very interested in seing some peerstats files for refclocks running this code. Poul-Henning PS: See also http://www.freebsd.org/~phk/timechan.gif -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." FreeBSD -- It will take a long time before progress goes too far! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message