[LinuxPPS] offsets

[Udo van den Heuvel]

Hello,

Today I built ntp4.2.4p4 from the Fedora 9 repo for my updated Fedora 8
box. I noticed after installing and starting this 4.2.4.p4 that the
*remote* offsets were all in the 170-180 ms range. Normally *all*
offsets are less than 20 ms, except when a remote host is off.
After reinstalling the old (4.2.4p2) version behaviour returned to normal.

What would cause this situation? (160+ ms difference between local and
remote)

(this is with the latest LinuxPPS and Garmin GPS-18 LVC)

Now:

# ntpq -pn
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 127.127.1.0     .LOCL.          10 l   32   64  377    0.000    0.000
 0.001
+127.127.20.0    .GPS.            0 l    5   16  377    0.000   10.894
 0.217
o127.127.22.0    .PPS.            0 l   10   16  377    0.000   10.901
 0.218
-194.109.22.18   193.67.79.202    2 u   36   64  377    8.049   16.175
 0.613
-213.84.46.114   192.87.106.2     2 u   16   64  377   15.823   15.511
 0.604
+80.85.129.25    130.235.20.3     3 u   59   64  377   11.185   11.535
 0.786
-81.171.100.41   66.187.224.4     2 u   11   64  377    8.301   13.687
 1.182
-81.171.44.131   193.79.237.14    2 u   64   64  377    8.376   12.329
 0.484
-88.191.32.45    88.191.254.7     3 u   32   64  377   24.176   12.925
 0.718
-83.243.84.13    131.234.137.23   2 u   31   64  377   15.195   21.860
 1.546

Wrong:

# ntpq -pn
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 127.127.1.0     .LOCL.          10 l   14   64   77    0.000    0.000
 0.001
*127.127.20.0    .GPS.            0 l   15   16  377    0.000   18.850
 2.440
 127.127.22.0    .PPS.            0 l    -   16    0    0.000    0.000
 0.001
-194.109.22.18   193.67.79.202    2 u   54   64   77    7.712  187.631
 6.844
+213.84.46.114   192.87.106.2     2 u   34   64   77   15.324  185.215
 6.117
-80.85.129.25    130.235.20.3     3 u   43   64   77   11.387  171.763
12.705
-81.171.100.41   66.187.224.4     2 u   12   64   77    8.518  189.615
 7.808
+81.171.44.131   131.188.3.221    2 u   61   64   77    8.524  180.844
10.188
-88.191.32.45    88.191.254.7     3 u    4   64  177   24.023  181.464
 6.884
-83.243.84.13    131.234.137.23   2 u   17   64   77   15.247  185.467
 6.801





Udo