[ntp:questions] Re: precision on different release

Terje Mathisen terje.mathisen at hda.hydro.com
Mon Jan 19 22:42:01 UTC 2004


Fei wrote:

> hi all:
> 
> I notice that the precision ( if you command sysinfo in ntpdc) has decreased
> after I upgrade the ntp from 4.1.1 to 4.2.0. There is no other changes on
> hardware and system. However, the precison has dropped form -31 to -18.

A precision of -31 corresponds to 0.5 ns (or thereabouts), which is 
still unattainable for nearly everyone except the national timing labs 
that define what UTC is.

-18 otoh is about 4 us, which is doable on most unix systems with a good 
refclock.

Terje

-- 
- <Terje.Mathisen at hda.hydro.com>
"almost all programming can be viewed as an exercise in caching"



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