[ntp:questions] SNTP with 1ms of precision?
"terje.mathisen at tmsw.no" at ntp.org
Mon Jun 21 16:02:17 UTC 2010
Marcelo Pimenta wrote:
> Yes!! My question is about ms(MILIsecond) a collegue of this forum said that
> NTP give nsec accurancy... Is impossible to have usec imagine nsec!
ns (as in less than us) is absolutely possible for NTP, but it cannot be
done over a network, you need a good deal of hardware support:
Poul-Henning Kemp has made several ntp servers where the local clock is
slaved to UTC with better than 100 ns precision:
To do so he needed to replace the motherboard crystal with an Rb
oscillator, use external hw to measure the interrupt latency and use a
timing-optimized GPS clock source.
- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"
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