[ntp:questions] Very large offset and jitter values after reboot
unruh-spam at physics.ubc.ca
Mon Aug 25 01:13:04 UTC 2008
nb at komeda-berlin.de (Nicola Berndt) writes:
>>> remote refid st t when poll reach delay offset
>>> GPS_NMEA(0) .GPS. 0 l 9 64 37 0.000 -580.75
>> You've not had your first 8 samples yet. You haven't actually had
>> enough for ntpd to act on the data. You can speed that up with iburst,
>> but ntpd will still take a long time to get a very tight lock. jitter
>> will reduce as you get to the eight samples. The good? think, is that
>> you are more than 128ms out, so that ntpd will step the time, to zero
>> the offset, once it gets enough samples.
>Just tried the iburst option, but I had to figure it only works with the
>server command, not on refclocks.
Oops forgot you have a gps clock. chrony does not work with refclocks.
>What really puzzles me, is the stoical 600 ms offset after rebooting.
>Since it is always returning having more or less the same amount, I
>should really be able to get rid of it, no?
It sounds like your rtc has problems. You can use hwclock to compensate for
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