[chrony-users] chrony ignoring shm source

[folkert <folkert@xxxxxxxxxxxxxx>]

Hello,

I cloned and compiled chrony from git today (hash:
34be117c9cc4ea471b13dd009fd2b18db48c8226).
Connected to the rpi on which I run it is a GPSDO. The GPSDO triggers
gpio 18 every second. A small program of mine updates the SHM
segments with offsets etc. This used to work fine with the original
ntpd.

My chrony.conf has:

    refclock SHM 0 poll 1 refid GPSO trust prefer

Now the strange this is that the SHM source stays '?':

MS Name/IP address         Stratum Poll Reach LastRx Last sample
===============================================================================
#? GPSO                          0   1     0     -     +0ns[   +0ns] +/-    0ns
^? 192.168.64.11                 0   8     0     -     +0ns[   +0ns] +/-    0ns
^? 192.168.65.254                0   8     0     -     +0ns[   +0ns] +/-    0ns
^- static.ip-031-223-173-22>     1   6   377    58   +612us[ +612us] +/- 3260us
^* 10.208.0.10                   2   6   377    61   -254us[ -765us] +/- 4360us

(please ignore the 192.168. sources)

I verified that in the shared memory segment, the 'valid' flag gets
set by the time-source and reset by chrony. I also added a printf in
shm_poll just before the last return statement of that function, and
that printf gets triggered. So chrony *does* poll and processed. I also
added printfs to RCL_AddSample and none of the return 0's are run.

measurements.log and tracking.log do not list the 'GPSO' source.

What can it be?


regards

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