latency spikes, was Re: [LinuxPPS] slightly offtopic

[Udo van den Heuvel]

Udo van den Heuvel wrote:
> Some largish (for this box) downloads.
> I then expect the box to keep pps as the main time source since the rest
> is 'far' away over the net.
> So how can it be that although there is NMEA stuff can still drift to
> another host as primary time source?

Now the box is more or less idle and I see this:

[root at epia ~]# ntpq -pn
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 127.127.1.0     .LOCL.          10 l   24   64  377    0.000    0.000
 0.002
x127.127.20.0    .GPS.            0 l   12   16  377    0.000  -169.48
 5.222
+194.109.22.18   193.67.79.202    2 u    9   64  377    7.364   -8.956
 1.442
+193.67.79.202   .GPS.            1 u   39   64  377   15.114   -8.285
 5.010
*193.79.237.14   .GPS.            1 u    1   64  377   13.440   -6.598
 1.588


(yes, I shortened the peer list a bit)

Nothing was changed in the GPS.