From owner-freebsd-stable@FreeBSD.ORG Thu Feb 11 22:01:11 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1EE271065670 for ; Thu, 11 Feb 2010 22:01:11 +0000 (UTC) (envelope-from mloftis@wgops.com) Received: from juggler.wgops.com (juggler.wgops.com [204.11.247.41]) by mx1.freebsd.org (Postfix) with ESMTP id EE90A8FC17 for ; Thu, 11 Feb 2010 22:01:10 +0000 (UTC) Received: by juggler.wgops.com (Postfix, from userid 65534) id 504CAA811C; Thu, 11 Feb 2010 15:01:10 -0700 (MST) X-Spam-ASN: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on juggler.wgops.com X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=ALL_TRUSTED autolearn=failed version=3.2.5 Received: from [192.168.1.44] (host-72-174-39-176.msl-mt.client.bresnan.net [72.174.39.176]) by juggler.wgops.com (Postfix) with ESMTPSA id 12D4FA811C for ; Thu, 11 Feb 2010 15:01:08 -0700 (MST) Date: Thu, 11 Feb 2010 15:01:26 -0700 From: Michael Loftis To: freebsd-stable@freebsd.org Message-ID: <9B1EC2BAEED06C693D8CF86F@[192.168.1.44]> In-Reply-To: <1265924999.12453@localhost> References: <20100211190652.6a66c618.torfinn.ingolfsen@broadpark.no> <20100211192515.GB13854@icarus.home.lan> <4B745F4B.3090201@delphij.net> <1265924999.12453@localhost> X-Mailer: Mulberry/4.0.8 (Win32) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Virus-Scanned: clamav-milter 0.95.3 at juggler X-Virus-Status: Clean Subject: Re: ntpd struggling to keep up - how to fix? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Feb 2010 22:01:11 -0000 --On Thursday, February 11, 2010 10:49 PM +0100 Stefan Krueger wrote: > > PS: I had a spare disk so I tried Linux on the same machine, and > ntpd is running fine for 2 days without any problems; so I guess it's > not a hw fault It is a HW fault. FreeBSD and Linux are just picking different time sources, Linux is guessing right, FreeBSD is guessing wrong. AMD actually has pretty widely known issues with this. I've had problems mostly in Solaris/OpenSolaris though, a few with FreeBSD, and only rarely with Linux. I don't know the details, just that at least the Opteron HPET apparently isn't reliable.