For what it's worth, I saw no showstopper bugs with either my FreeBSD or
Windows systems.
- The FreeBSD 8.2 fed from the Garmin GPS 18 LVC behaved perfectly. ntpd
4.2.7p255
- The Windows PCs fed from either Garmin GPS 18/x LVC or Sure Electronics
GPS boards appear to have reset itself some 17..24 minutes after 00:00,
suggesting they were using the GPS for the time (as well as the precise PPS
edge), and the GPS devices took some time to reflect the leap-second in
their serial outputs. Almanac reload time? These PCs had the leap-seconds
file. Perhaps it would have been better had ntp not believed the GPS serial
time for the coarse time, but the time coming from other LAN/WAN servers?
This needs closer investigation. The reset resulted in a further period
until normal offset accuracy was restored. ntpd 4.2.7p285.
PCs: Alta, Bacchus, Feenix & Stamsund in the graphs linked below.
- The Windows PCs working from LAN/WAN sources saw no glitch. ntpd
4.2.7p285
PCs: Hydra, Molde, Narvik, Torvik & Ystad in the graphs below:
Offset graphs:
http://www.satsignal.eu/mrtg/performance_ntp.php
Cheers,
David
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