Richard B. Gilbert schrieb: > Heiko Gerstung wrote: >> Hi Folks, >> >> I have a problem on a NTP client, it seems to face sudden timesteps >> and I currently do not have any good explanation for this. >> >> (NTP Version is ntpd [EMAIL PROTECTED]) >> >> Apr 24 06:56:50 ntpd[13372]: time reset 0.947095 s >> Apr 24 06:56:50 ntpd[13372]: synchronisation lost >> Apr 24 07:23:56 ntpd[13372]: time reset -0.456118 s >> Apr 24 07:23:56 ntpd[13372]: synchronisation lost >> Apr 25 03:56:56 ntpd[13372]: time reset 0.949329 s >> Apr 25 03:56:56 ntpd[13372]: synchronisation lost >> Apr 25 04:23:53 ntpd[13372]: time reset -0.457310 s >> Apr 25 04:23:53 ntpd[13372]: synchronisation lost >> Apr 26 00:57:03 ntpd[13372]: synchronisation lost >> Apr 26 01:15:09 ntpd[13372]: time reset 1.072991 s >> Apr 26 01:15:09 ntpd[13372]: synchronisation lost >> Apr 26 01:38:48 ntpd[13372]: time reset -0.467324 s >> Apr 26 01:38:48 ntpd[13372]: synchronisation lost >> >> This happens on a few machines running in a classified network and I >> am not sure if it will be possible to update the NTP on these >> machines. I just wanted to know if one of you ever came across such a >> behavior or what good (or not so good) reasons could cause this. >> >> The logs do not show specific jobs running at those times. According >> to my customer the time offset will not be corrected when NTP is not >> running (or is told not to correct the clock), therefore I am quite >> sure that this is not caused by NTP itself but by some other process / >> kernel misbehaviour. >> >> But a 1 second jump every few hours? Wow ... >> >> Regards, >> Heiko > > It doesn't look quite that simple. It's jumping +1, -1/2, +1, -1/2. > Something is very wrong there but it's hard to tell what it might be > from the evidence presented.
Yes, but the -0.5s step is due to ntpd trying to correct the offset. If you do not use ntpd to correct this stuff, it will simply jump in one direction and stay there :-( ... Is there anything I could check or anything you would need to see in order to strike out possible reasons? Regards, Heiko _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
