Jochen Bern <jochen.b...@linworks.de> wrote: > However, I've also seen hardware occasionally flip-flopping from -900 to > +1100 and back, complete with the developers of the firmware blaming "a > bug in ntpd" for failure to discipline *that*.
Ok that is different, it is not a static drift. But I see it has also been explained elsewhere in the thread: ntpd has a maximum on the momentary drift of 500ppm, no matter if it is static or dynamic or the sum of two. I think that is not warranted. There are also other problems with dealing with a variable drift. I know from observations that ntpd does not attempt to handle a changing drift, it only tries to lock in to the momentary drift and when that is changing, it keeps chasing the drift (resulting in an offset). In practice a changing drift is often caused by changing temperature, and it would be better to take the first derivative into account as well. _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
