[ntp:questions] Re: Best way to harness multiple stratum 1 servers
terje.mathisen at hda.hydro.com
Thu Apr 6 08:32:24 UTC 2006
Richard B. Gilbert wrote:
> I believe I have read the PHK has modified the ntpd PLL for use with
> refclocks such as GPS and Cesium. I don't know PLL design from a hole
> in the ground but he might have improved the design for that specific
> purpose. It's worth looking into!!
> BTW, what hardware and O/S are you using for this project? Solaris
> 8/SPARC keeps time to a precision of one microsecond. I don't know of
> any hardware/software that supports a higher precision but there may
> well be some.
AFAIK, Sun was the first to implement nanosecond kernel time resolution,
it is definitely a standard part of all FreeBSD systems, and an absolute
requirement if you want sub-microsecond GPS/Cs performance.
Ulrich Windl have maintained a set of patches to Linux to get ns there
- <Terje.Mathisen at hda.hydro.com>
"almost all programming can be viewed as an exercise in caching"
More information about the questions