On 15/01/2013 19:05, Chuck Swiger wrote:
Hi--
[]
Out of ~100 emails from this group listing precisions in the modern format
(ie, NTP-4.2.x), a histogram [1] of results is:
46 precision=-19
16 precision=-20
12 precision=-14
8 precision=-18
4 precision=-8
3 precision=-15
3 precision=-10
2 precision=-16
1 precision=-21
1 precision=-13
1 precision=-19
1 precision=-10
One might do better using 'ntpq -crv' against published NTP servers or pool
members to collect data.
Regards,
For amusement, I knocked up a little DOS script and got the following:
FreeBSD 8.2 Intel Atom
PC Pixie
precision=-19, refid=PPS, system="FreeBSD/8.2-RELEASE-p6"
________________________________
Linux
PC RasPi-1
precision=-18, refid=PPS, system="Linux/3.2.27-pps-g965b922-dirty"
PC RasPi-2
precision=-19, refid=PPS, system="Linux/3.2.27-pps-g965b922-dirty"
________________________________
Windows Stratum-1
PC Alta Win-7/64
precision=-22, refid=PPS, system="Windows"
PC Bacchus Win-2000
precision=-18, refid=PPS, system="Windows"
PC Feenix Win-XP
precision=-18, refid=PPS, system="Windows"
________________________________
Windows LAN-synced
PC Hydra Win-7/64
precision=-10, refid=192.168.0.3, system="Windows"
PC Narvik Win-XP
precision=-21, refid=192.168.0.3, system="Windows"
________________________________
Windows Wi-Fi synced
PC Bergen Win-8
precision=-19, refid=192.168.0.3, system="Windows"
PC Molde Win-7/64
precision=-10, refid=192.168.0.3, system="Windows"
PC Ystad Win-7/32
precision=-10, refid=192.168.0.3, system="Windows"
________________________________
Hope that's of some interest. The Windows systems without interpolation
(Win-7) have a clock interval of about 1 ms, so precision=-10 seems
correct. PC Alta is Win-7/64, but has interpolation forced on.
--
Cheers,
David
Web: http://www.satsignal.eu
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