[ntp:questions] best gps receiver for time synchronization

[David Woolley]

David J Taylor wrote:

> 
> - with operating system calls, the main clock can be read with a 
> precision of 1 millisecond (although the ticks may be only 15 
> milliseconds).  There are higher resolution counters which can also be 
> read.


The architectural resolution is much higher than this.  I think you are 
seeing actual 1ms clock ticks, as the result of ntpd forcing the use of 
multi-media timer mode.