[ntp:questions] best gps receiver for time synchronization

hvengel at astound.net hvengel at astound.net
Thu May 28 00:07:24 UTC 2009

On May 13, 10:25 am, Unruh <unruh-s... at physics.ubc.ca> wrote:
> What the structure returns need have nothing to do with the accuracy.
> Linux system calls can return a structure with nsec but the accuracy of
> the linux clock is no better than usec.

This has not been true since 2.6.26.  Linux since that time has had a
nanosecond kernel and with the LinuxPPS patches and some other tweaks
and a good reference clock will give you sub-microsecond offsets most
of the time.  There is still work being done on the kernels time
related functionality but as it matures it will be as good as anything
out there now and will be comparable to FreeBSD.

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