On 2013-05-31, Steve Kostecke <[email protected]> wrote: > On 2013-05-31, [email protected] <[email protected]> wrote: > >> On Thursday, May 30, 2013 5:41:46 PM UTC-5, unruh wrote: >> >>> You can expect offsets of the order of 10-20microseconds IF the ntp >>> servers get their time from gps. If not, the servers themselves can >>> be woggling all over the place. > > That's misleading.
Probably. What I was trying to emphasise is that in worrying about the scatter of offsets on your machine, you have to wrry about the source as well. One of my machines ( connected to a Garmin 18 gps) has a scatter of offsets of about 100 usec. Clearly the Gamin has failed. (actually they seem to produce crap, since both my Garmin 18s have failed over about 3 years time). Clearly you can tell very little about your own machine's timekeeping if you use something like that machine as your source of time. > >> Is there any way to determine if the ntp servers are using GPS or not? > > Query them with ntpq. http://doc.ntp.org/4.2.4/ntpq.html > > But keep in mind that there other factors besides the time source at > play here. > _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
