From owner-freebsd-current Tue Mar 11 16:24:56 2003 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7AA9B37B401 for ; Tue, 11 Mar 2003 16:24:55 -0800 (PST) Received: from mail.allcaps.org (allcaps.org [216.240.173.16]) by mx1.FreeBSD.org (Postfix) with ESMTP id CFB5743FCB for ; Tue, 11 Mar 2003 16:24:54 -0800 (PST) (envelope-from bsder@allcaps.org) Received: from mail.allcaps.org (localhost [127.0.0.1]) by mail.allcaps.org (Postfix) with ESMTP id AA2AC92FAF; Tue, 11 Mar 2003 19:24:57 -0500 (EST) Received: from localhost (bsder@localhost) by mail.allcaps.org (8.12.5/8.12.5/Submit) with ESMTP id h2C0OvJY011208; Tue, 11 Mar 2003 16:24:57 -0800 X-Authentication-Warning: mail.allcaps.org: bsder owned process doing -bs Date: Tue, 11 Mar 2003 16:24:57 -0800 (PST) From: "Andrew P. Lentvorski, Jr." To: James Satterfield Cc: current@freebsd.org Subject: Re: Time drift. In-Reply-To: <20030311155025.40d23e08.james@uberduper.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Tue, 11 Mar 2003, James Satterfield wrote: > I'm getting what I think is substantial time drift on my -current boxes. > My home firewall in particular drifts about .42 seconds every hour. My > desktop machine drifted ~350 seconds over the last 5 days. .42 s/ 1 hr is about 116 ppm stability 350 s/ 5 days is about 810 ppm stability 116 ppm stability is certainly within the specification of most quartz crystals and PC southbridges. 810 ppm stability is a little sloppier than I would expect, but certainly not outside the realm of possibility. It could be a bug, but I wouldn't bet on it. The standard answer of "run NTP" applies. An $8.00 wristwatch has much better time accuracy that your multi-$100 PC. -a To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message