On 2009-12-30, David J Taylor <david-tay...@blueyonder.delete-this-bit.and-this-part.co.uk.invalid> wrote: > "unruh" <un...@wormhole.physics.ubc.ca> wrote in message > news:slrnhjkta6.4e4.un...@wormhole.physics.ubc.ca... >> ntpd has suddenly broken out into oscillations. it is fed by a Garmin >> 18 LVC PPS via shm. The oscillation has a period of just under an hour ( >> about 50 min) and an amplitude of about 10usec. in the offsets ( >> amplitude of about .005PPM in the rate). Since this is acting as the >> clock for a number of other machines, they are also showing the >> oscillation especially in the rate. >> While I suppose this could be something in the GPS itself, it looks more >> like an oscillation in ntpd. >> Nothing changed when the oscillations started. Ntpd had been started >> on Dec 14, and this change began on Dec24. >> You can see the graph on www.theory.physics.ubc.ca/chrony/chrony.html , >> the graph for the machine called string. >> >> Has anyone else ever seen this kind of thing? > > Something similar, perhaps, yes, and I reported it here before. > > It seems that NTP hits the +/- 500 ppm drift limit and can't recover - > check the drift file contents. You might try deleting (or renaming) the > drift file. I haven't seen this for some time, though. What version are > you running?
Nope, the drift is NOT at the limit ( it is at about 200) ntp 2.4.2p4 > > Cheers, > David > _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
