[Info-vax] Leap second checking

[Michael Moroney]

JF Mezei <jfmezei.spamnot at vaxination.ca> writes:

>Michael Moroney wrote:

>> I checked the logs in SYS$SPECIFIC:[TCPIP$NTP] and saw the update before 
>> the leap second, my system clock was 13 milliseconds slow.  The one 
>> immediately after showed my system clock was 990 milliseconds fast. 

>Here is the relevant part from my log:

This is from my log:

31 Dec 17:16:57 ntp[162]: synchronized to 64.202.112.75, stratum=1
31 Dec 17:26:09 ntp[162]: offset: 0.013148 sec  freq: 18.067 ppm  poll: 1024 sec
  error: 0.021908
31 Dec 18:26:13 ntp[162]: offset: 0.010839 sec  freq: 18.091 ppm  poll: 1024 sec
  error: 0.017901
31 Dec 19:00:21 ntp[162]: synchronized to 72.3.232.12, stratum=2
31 Dec 19:06:43 ntp[162]: synchronized to 216.184.20.82, stratum=2
31 Dec 19:17:24 ntp[162]: no servers reachable
31 Dec 19:23:27 ntp[162]: synchronized to 64.202.112.75, stratum=1
31 Dec 19:26:16 ntp[162]: offset: -0.992221 sec  freq: 13.885 ppm  poll: 64 sec
 error: 0.026803
31 Dec 19:34:30 ntp[162]: synchronized to 208.113.193.9, stratum=2
31 Dec 19:40:33 ntp[162]: synchronized to 64.202.112.75, stratum=1
31 Dec 20:26:19 ntp[162]: offset: 0.010502 sec  freq: 6.072 ppm  poll: 128 sec
error: 0.150943

As you can see from the offset field, my system's time went from 11
milliseconds slow to 992 milliseconds fast.  (Not exactly 1 second, Alpha
clocks aren't all that precise).  It then adjusted to 10+ ms slow.

Freq sounds like frequency, but of what, I don't know.  ppm is parts per
million.