From owner-freebsd-alpha Tue May 18 1:31:44 1999 Delivered-To: freebsd-alpha@freebsd.org Received: from herring.nlsystems.com (nlsys.demon.co.uk [158.152.125.33]) by hub.freebsd.org (Postfix) with ESMTP id 6660B14FDD for ; Tue, 18 May 1999 01:31:41 -0700 (PDT) (envelope-from dfr@nlsystems.com) Received: from localhost (dfr@localhost) by herring.nlsystems.com (8.9.3/8.8.8) with ESMTP id JAA68972; Tue, 18 May 1999 09:32:28 +0100 (BST) (envelope-from dfr@nlsystems.com) Date: Tue, 18 May 1999 09:32:28 +0100 (BST) From: Doug Rabson To: Dmitrij Tejblum Cc: John Polstra , alpha@freebsd.org Subject: Re: Clock drift on the alpha In-Reply-To: <199905180759.LAA01124@tejblum.dnttm.rssi.ru> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Tue, 18 May 1999, Dmitrij Tejblum wrote: > > Is this a common problem? My dmesg output is below. > > Exactly same here. > > > > > Also, is xntpd broken on the alpha? It has been running nonstop on > > this machine for 8 hours, and it has written a drift file. But the > > file contains "0.000 0", which is clearly wrong. > > I think, xntpd just cannot deal with the huge drift. > > > EB164 > > Digital AlphaPC 164LX 533 MHz, 531MHz > > 8192 byte page size, 1 processor. > > CPU: EV56 (21164A) major=7 minor=2 extensions=0x1 > > My alpha is pretty much the same, except it is 164SX rather than LX > (and the CPU is 21164PC). Note that if the clock frequency was set > to 533MHz, not to 531, the drift appatrently would be much better. > It may be a quirk in the alpha hardware or firmware. It seems like I'm being a bit optimistic in believing the firmware value for the clock frequency. Perhaps it would be better to actually time the frequency of the PCC in a similar way to the i386. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message