[ntp:questions] ntp discipline of local time?

Unruh unruh-spam at physics.ubc.ca
Sun Mar 23 23:59:30 UTC 2008

How does ntp actually discipline the local clock? I have a gps received
attached to a computer which is disciplined by a remote clock over an ADSL
line. (Ie, the gps does not act as a refclock -- it is purely to measure
the actual offset of the system. It is only the remote server that actaully
acts the ntp reference source.)
I can watch how ntp alters the local clock in response to remote
offsets. The response is not linear. rather it is "curved" as though the
rate of the local clock were exponentially eliminating the offset. But this
is between two succesive runnings of the loopstats. Where is this behaviour
determined? -- ie which routines determines the response of the system
between to successive measurements of the offset?

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