From owner-freebsd-alpha Tue Nov 12 7:48:22 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E90F037B401 for ; Tue, 12 Nov 2002 07:48:21 -0800 (PST) Received: from mail.speakeasy.net (mail16.speakeasy.net [216.254.0.216]) by mx1.FreeBSD.org (Postfix) with ESMTP id 79F4143E3B for ; Tue, 12 Nov 2002 07:48:21 -0800 (PST) (envelope-from jhb@FreeBSD.org) Received: (qmail 2077 invoked from network); 12 Nov 2002 15:48:23 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) by mail16.speakeasy.net (qmail-ldap-1.03) with DES-CBC3-SHA encrypted SMTP for ; 12 Nov 2002 15:48:23 -0000 Received: from laptop.baldwin.cx (gw1.twc.weather.com [216.133.140.1]) by server.baldwin.cx (8.12.6/8.12.6) with ESMTP id gACFmE2D004666; Tue, 12 Nov 2002 10:48:15 -0500 (EST) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.5.2 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <15824.15617.29097.140638@grasshopper.cs.duke.edu> Date: Tue, 12 Nov 2002 10:48:16 -0500 (EST) From: John Baldwin To: Andrew Gallatin Subject: Re: Extreme time drift in SMP mode Cc: freebsd-alpha@freebsd.org, "Michael A. Mackey" Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On 11-Nov-2002 Andrew Gallatin wrote: > > Michael A. Mackey writes: > > It takes precisely twice as long (20 seconds) to run `sleep 10`. > > > > Why can't ntpd keep things in line? > > > > Because its not desgined to fix a clock which is that broken -- it > only increments a second or so at a time. Far too slow for your > purposes. So the clock is running at half-speed now? Hmm, the 2100[A] are Tincup, not Turbolaser, right? So it should be using the i8254 for its timecounter. Maybe the 8254 timecounter isn't setup right on the 2100a? -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message