ntpq peers formatting needs floating point for time slots.

Gary E. Miller gem at rellim.com
Tue Feb 7 22:44:54 UTC 2017

Yo Achim!

On Tue, 07 Feb 2017 20:56:36 +0100
Achim Gratz <Stromeko at nexgo.de> wrote:

> Hal Murray writes:
> > Looks like we are getting into the old precision vs accuracy tangle.
> > Do we have a glossary with useful descriptions?
> > That slot should represent the number of useful bits.  
> It really doesn't help that precision, accuracy and resolution have a
> number of different meanings depending on the context.  It is doubly
> unfortunate that NTP necessarily uses several of these contexts.


> In measurement statistics, precision describes the variability of the
> distribution of many repeated measurements of the same quantity and
> accuracy the deviation of the location parameter on that statistic to
> the "ground truth" (or more commonly to another measurement that ius
> known to have higher precision and accuracy).  It is generally assumed
> that the measurement process has much higher resolution than the
> precision of the measurement and the measurement distribution can be
> assumed to be continous.  Resolution in this context is the smallest
> change in the measured quantity that will yield a discernible change
> of the measured value.

I think you are assuming way too much.  For example, on the RasPi the
resolution is worse than the accurcay of the GPS.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 455 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ntpsec.org/pipermail/devel/attachments/20170207/b236925e/attachment.bin>

More information about the devel mailing list