[ntp:questions] NTP vs chrony comparison (Was: oscillations in ntp clock synchronization)

Unruh unruh-spam at physics.ubc.ca
Sun Jan 27 17:45:49 UTC 2008


mayer at ntp.isc.org (Danny Mayer) writes:

>David L. Mills wrote:
>> Danny,
>> 
>> Unless the computer clock intrinsic frequency error is huge, the only 
>> time the 500-PPM kicks in is with a 100-ms step transient and poll 
>> interval 16 s. The loop still works if it hits the stops; it just can't 
>> drive the offset to zero.
>> 
>> Dave

>Yes, I found this out when my laptop stopped disciplined the clock and 
>was complaining about the frequency limits and I started digging into 
>the code to figure out why.

Why can't it drive the offset to zero? 100ms should take about 5 min(if it
were always 500 but the loop would make it take longer)




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