From owner-freebsd-questions@FreeBSD.ORG Thu May 15 19:10:30 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B1A6210656AB for ; Thu, 15 May 2008 19:10:30 +0000 (UTC) (envelope-from volker@thalreit.de) Received: from moutng.kundenserver.de (moutng.kundenserver.de [212.227.126.177]) by mx1.freebsd.org (Postfix) with ESMTP id 1ECFA8FC26 for ; Thu, 15 May 2008 19:10:30 +0000 (UTC) (envelope-from volker@thalreit.de) Received: from thalreit.de (p5496D19C.dip.t-dialin.net [84.150.209.156]) by mrelayeu.kundenserver.de (node=mrelayeu3) with ESMTP (Nemesis) id 0MKxQS-1JwieH0cFg-0001Al; Thu, 15 May 2008 20:57:53 +0200 Received: from localhost ([127.0.0.1] helo=ikarus.thalreit) by thalreit.de with esmtp (Exim 4.63 (FreeBSD)) (envelope-from ) id 1JwieN-0003Ki-PE; Thu, 15 May 2008 20:57:59 +0200 Received: (from volker@localhost) by ikarus.thalreit (8.13.6/8.13.6/Submit) id m4FIvxkU012815; Thu, 15 May 2008 20:57:59 +0200 (CEST) (envelope-from volker) Date: Thu, 15 May 2008 20:57:59 +0200 From: Volker Jahns To: freebsd-questions@freebsd.org Message-ID: <20080515185758.GA12709@ikarus.thalreit> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.2.3i X-Provags-ID: V01U2FsdGVkX18zzjlrUNqdaBus2eAI6WEBtrBvSh/ijQCooSM BUlbD1YWQmfOuq4BfA96ScBwUfrXchrVvYp8kvgL2P957X0TOn 2uLmVB/vzagGh3SnoAjLA== Cc: volker@thalreit.de Subject: time drift X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 May 2008 19:10:31 -0000 FreeBSD 6.2 running on X86 hardware (FSC) shows a remarkable time drift running ntpdate every half hour shows that the system looses about 10-14 sec each time. 15 May 10:06:48 ntpdate[7200]: step time server 192.53.103.108 offset -13.799602 sec 15 May 10:36:48 ntpdate[7515]: step time server 192.53.103.108 offset -12.813941 sec 15 May 11:06:48 ntpdate[7879]: step time server 192.53.103.108 offset -13.651921 sec 15 May 11:36:50 ntpdate[8079]: step time server 192.53.103.108 offset -11.109298 sec 15 May 12:06:50 ntpdate[8289]: step time server 192.53.103.108 offset -11.836499 sec FreeBSD 7.0 on an otherwise almost identical system has a time drift of a few millisecs every half hour. 15 May 10:35:00 ntpdate[7999]: adjust time server 192.53.103.108 offset 0.009963 sec 15 May 10:35:51 ntpdate[8007]: adjust time server 192.53.103.108 offset -0.004890 sec 15 May 10:50:00 ntpdate[8042]: adjust time server 192.53.103.108 offset 0.010734 sec 15 May 11:05:00 ntpdate[8088]: adjust time server 192.53.103.108 offset 0.004523 sec 15 May 11:20:01 ntpdate[8114]: adjust time server 192.53.103.108 offset 0.005800 sec The 6.2 system is a production system, has a uptime of almost 300 days and I don't want to experiment a lot with acpi, battery or so. What would be your suspicion on the large time drift of the FreeBSD 6.2 system? -- Volker Jahns, volker@thalreit.de