From owner-freebsd-alpha Tue May 18 8:45: 7 1999 Delivered-To: freebsd-alpha@freebsd.org Received: from wall.polstra.com (rtrwan160.accessone.com [206.213.115.74]) by hub.freebsd.org (Postfix) with ESMTP id 9C29814CFF for ; Tue, 18 May 1999 08:44:45 -0700 (PDT) (envelope-from jdp@polstra.com) Received: from vashon.polstra.com (vashon.polstra.com [206.213.73.13]) by wall.polstra.com (8.9.3/8.9.1) with ESMTP id IAA08290; Tue, 18 May 1999 08:44:44 -0700 (PDT) (envelope-from jdp@polstra.com) Received: (from jdp@localhost) by vashon.polstra.com (8.9.3/8.9.1) id IAA16318; Tue, 18 May 1999 08:44:44 -0700 (PDT) (envelope-from jdp@polstra.com) Message-ID: X-Mailer: XFMail 1.3 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Tue, 18 May 1999 08:44:44 -0700 (PDT) Organization: Polstra & Co., Inc. From: John Polstra To: Doug Rabson Subject: Re: Clock drift on the alpha Cc: alpha@freebsd.org Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I'm trying Doug's clock calibration patch. Though the system hasn't been up very long yet, it's already doing _much_ better. xntpd is actually able to sync up now, instead of giving up in despair every 7 minutes like it did before. I'll report again later in the day after it's had time to settle in. The calibration found a much different clock frequency than had been found before: before: Timecounter "alpha" frequency 531914893 Hz after: Timecounter "alpha" frequency 533180986 Hz I'd say the "before" number was just plain wrong. I noticed that on beast, there's no disagreement between the nominal CPU speed and the nominal clock frequency: Digital AlphaPC 164 500 MHz, 500MHz Maybe on the 533 MHz version they transcribed bit 2**20 incorrectly ... :-) John -- John Polstra jdp@polstra.com John D. Polstra & Co., Inc. Seattle, Washington USA "Self-interest is the aphrodisiac of belief." -- James V. DeLong To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message