[ntp:questions] WiFi & NTP.
Richard B. Gilbert
rgilbert88 at comcast.net
Thu Aug 30 13:19:33 UTC 2007
Dennis Hilberg Jr wrote:
> Jason Rabel wrote:
>> Those numbers seem much more reasonable.
>> The root dispersion is the maximum error between the local clock and the
>> root of the NTP chain. Your time on each system is accurate to within the
>> range given above.
> My problem is that I misunderstood you when you said 'precision'. I was
> simply referring to offsets grabbed from ntpq. Perhaps Guy was too.
The NTP world uses the word "precision" to designate the value of the
low order bit kept by the system clock; e.g. the smallest possible
difference between the two consecutive time stamps. It's generally
specified as a negative power of two.
My Sun Solaris (SPARC) boxes have a precision of -21 but an accuracy of
plus/minus 5 milliseconds when synchronized from the internet.
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