[time-nuts] Graphs

[Hal Murray]

Here is data from a system using Google's NTP servers.
  http://users.megapathdsl.net/~hmurray/time-nuts/leap/ntp-goog-leap.png

The Offset is the view from another system.  The drift is from the system 
itself.
Google said 13.9 uSec/sec.  That matches the step in the drift.

Note the overshoot at the end of the smear.  It's about 50 ms.  There is a 
similar blip at the start of the smear, but it's harder to see when it's 
riding on top of the sloped line.


The NIST UT1 server smeared the second over a whole day.  ??
  http://users.megapathdsl.net/~hmurray/time-nuts/leap/UT1-SF-leap.png


Somebody asked about systems that "freeze" the clock for a second.  Linux, 
NetBSD, and FreeBSD all stepped the clock back.  An OpenBSD system was off by 
a second for about 4 hours.


-- 
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