[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.
More information about the questions
mailing list