[ntp:questions] Extracting ntpq like information programmatically

David Woolley david at ex.djwhome.demon.invalid
Sat Mar 30 16:47:23 UTC 2013

Claudio Carbone wrote:

> That depends entirely on the performance of the communication framework 
> we are using.
> Which is what I'm trying to measure.

That's your basic problem:  you are trying to measure with a mechanism 
that is subject to the parameters you are trying to measure!

> I'm open to suggestions as to how to meter these variables in this 
> situation.

As suggested in another thread, your measurement system really ought to 
be an order of magnitude better than your desired measurement errors, 
which would mean using PPS, either directly, or with a timing GPS 
receiver on each robot.

If you are forced to work within the current constraints, you will need 
to do a very detailed analysis to work out how much real information you 
can get from the system.  That is going to involve your getting very 
much inside the white box for NTP.

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