Preliminary results of using GPS to look for clock skew

Jan Ceuleers jan.ceuleers at
Fri Sep 23 05:09:02 EDT 2011

On 09/22/2011 02:18 AM, Dave Taht wrote:
> Two ideas here:
> 1) Run the router WITHOUT ntp enabled at all
>     (and/or testing against CLOCK_REALTIME)
>     It would be good to know how much the base clock drift is, without
> correction.

Note that ntpd has infrastructure for measuring the drift: use the 
driftfile setting in the config file and ntpd will periodically write 
the drift in ms to it.


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