[ntp:questions] Very large offset and jitter values after reboot

Nicola Berndt nb at komeda-berlin.de
Sun Aug 24 23:24:37 UTC 2008

>>      remote           refid      st t when poll reach   delay   offset  
>> jitter
>> ==============================================================================
>>  GPS_NMEA(0)     .GPS.            0 l    9   64   37    0.000  -580.75 
>> 3965.19
> 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.

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?

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