David, David J Taylor wrote: > David J Taylor wrote: >> Martin Burnicki wrote: > [] >>> If the MM timer is set constantly to high resolution then you should >>> observe a little more jitter than with default resolution, but the >>> large steps should go away. So as a test you just might to start >>> Quicktime and watch if the offset settles down. > [] > > Well, with the MM timer permanently running (from 17:00 Wednesday) I can > report that things are /much/ better, see: > > http://www.david-taylor.myby.co.uk/mrtg/odin_ntp.html > > - the offset first shot up to 120ms, but is now gently decaying towards > zero. > > - the jitter figures seem much better, around 1 (LAN servers) - 2ms (WAN > servers). > > - the drift value has changed from -65 down to -9.3ms.
Those results are exactly what I've expected. > I would certainly like the option, for this system at least, of running > with the MM timers permanently in its high resolution mode. Agreed. Maybe Danny and Harlan accept my patch. > I would also be interested in determining which program is switching the > MM timer speed, and thereby upsetting the otherwise excellent timekeeping > on this system. I wonder if there's a relatively easy way to determine > this? Unfortunately there's no way to find that out, AFAIK. You can only observe the effects indirectly. Martin -- Martin Burnicki Meinberg Funkuhren Bad Pyrmont Germany _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
