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Date:      Thu, 11 Mar 1999 15:57:06 +0000 (GMT)
From:      Mark Powell <M.S.Powell@ais.salford.ac.uk>
To:        freebsd-questions@freebsd.org
Subject:   NTP problems. This hardware related?
Message-ID:  <Pine.BSF.4.05.9903111549580.17625-100000@plato.salford.ac.uk>

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Hi,
  Running xntpd on a new server in just the same was as I do on every
other. However, I noticed this machines clock was way out after a few
days. The machine does an "ntpdate -b" at bootup, but can't sync the
time. From ntp log:

Mar  4 11:32:33 mimas xntpd[111]: offset 0.000000 freq 11.708 poll 6
Mar  4 12:32:33 mimas xntpd[111]: offset 0.000000 freq 11.708 poll 6
Mar  4 13:32:33 mimas xntpd[111]: offset 0.000000 freq 11.708 poll 6
Mar  4 14:32:33 mimas xntpd[111]: offset 0.000000 freq 11.708 poll 6
Mar  4 15:32:33 mimas xntpd[111]: offset 0.000000 freq 11.708 poll 6

The offsets are always o and the 11.708, from /etc/ntp.drift never
changes.
  I changed to having "ntpdate <h1> <h2> ..." run from cron. Again from
ntp log:

ntpdate[6478]: step time server 146.87.255.63 offset -2.495694
ntpdate[6481]: step time server 146.87.255.63 offset -2.495796
ntpdate[6489]: step time server 146.87.255.63 offset -2.498253

This machine is gaining ~2.5s every minute! No wonder xntpd can't sync the
time. Am I right here? Is that why it's failing?
  Looking at the clocks at boot up, it would appear that over 40 reboots,
the TSC clock has varied from 126668897 to 132002659, a variance of almost
5%. Is this normal? Could this be causing the time problems, and if so
is there anyway I can fiddle with tickadj or something to let xntpd
work on this machine?
Cheers.

Mark Powell - System Administrator (UNIX) - Clifford Whitworth Building
A.I.S., University of Salford, Salford, Manchester, UK.
Tel: +44 161 295 5936  Fax: +44 161 295 5888  www.pgp.com for PGP key
M.S.Powell@ais.salfrd.ac.uk (spell salford correctly to reply to me)



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