[ntp:questions] Advice for a (LAN-interconnected) WLAN Testbed w/ ARM nodes
david at ex.djwhome.demon.invalid
Tue Aug 3 22:30:17 UTC 2010
Miroslav Lichvar wrote:
> But there will be more clock updates. Noise in frequency may go up,
> but the offset will be the same or better, unless there are network
> congestions that last longer than the clock filter can handle (8 *
> poll interval).
The "offset" may be better, but offset is not the offset from true time,
it is the offset from the sum of the upstream server time and the
measurement errors for the last poll. There should be no way of
measuring the error from UTC. The fact that you can do so, to some
extent, is due to the NTP algorithms being less than ideal.
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