Date: Tue, 18 May 1999 09:32:28 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru> Cc: John Polstra <jdp@polstra.com>, alpha@freebsd.org Subject: Re: Clock drift on the alpha Message-ID: <Pine.BSF.4.05.9905180930550.509-100000@herring.nlsystems.com> In-Reply-To: <199905180759.LAA01124@tejblum.dnttm.rssi.ru>
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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<BWX> > > 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
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