[LinuxPPS] gps influence

[Udo van den Heuvel]

So I download the patch to 2.6.19.1. and compiled, booted.
Took a look at ntp after a while:

[root at epia ~]# ntpq -pn
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 127.127.1.0     .LOCL.          10 l   53   64  377    0.000    0.000
 0.001
x127.127.20.0    .GPS.            8 l   12   16  377    0.000  -285.32
 4.184
+194.109.22.18   131.188.3.220    2 u  193  256  377    7.103  -97.495
15.659
*193.67.79.202   .GPS.            1 u   19  256  377   14.518  -106.58
16.019
+193.79.237.14   .GPS.            1 u  227  256  377   12.995  -79.606
20.620
 82.92.197.115   .STEP.          16 u    - 1024    0    0.000    0.000
 0.000
+82.93.103.174   .GPS.            1 u  184  256  377   15.107  -81.822
26.457
-83.83.82.105    193.79.237.14    2 u  155  256  377   16.380  -79.526
21.607

A bit later:

[root at epia ~]# ntpq -pn
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 127.127.1.0     .LOCL.          10 l   51   64  377    0.000    0.000
 0.001
x127.127.20.0    .GPS.            8 l    1   16  377    0.000  -353.83
 5.238
-194.109.22.18   131.188.3.220    2 u  134  256  377    7.664  -138.57
23.118
+193.67.79.202   .GPS.            1 u  221  256  373   16.537  -160.30
30.786
+193.79.237.14   .GPS.            1 u  177  256  377   12.696  -163.09
25.259
 82.92.197.115   .STEP.          16 u    - 1024    0    0.000    0.000
 0.000
*82.93.103.174   .GPS.            1 u  129  256  377   14.872  -145.98
16.984
-83.83.82.105    193.79.237.14    2 u  107  256  377   15.107  -125.80
31.270

See how stuff gets worse? Bigger offsets.
Then I unplugged the gps.

[root at epia ~]# ntpq -pn
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 127.127.1.0     .LOCL.          10 l   45   64  377    0.000    0.000
 0.001
 127.127.20.0    .GPS.            8 l  81m   16    0    0.000    0.000
 0.001
+194.109.22.18   193.67.79.202    2 u    3   64  377    9.531  -63.429
15.054
*193.67.79.202   .GPS.            1 u   33   64  377   15.013  -61.513
 9.578
+193.79.237.14   .GPS.            1 u   52   64  377   24.107  -68.326
 5.637
 82.92.197.115   .STEP.          16 u    - 1024    0    0.000    0.000
 0.000
+82.93.103.174   .GPS.            1 u   30   64  377   31.068  -69.758
 2.724
-83.83.82.105    193.79.237.14    2 u    2   64  377   16.881  -61.174
13.112

And stuff got better again.
So what does a stratum 8 gps do!?
Any ideas?
/proc stuff still don't work.