[time-nuts] PPS stats

[Keith E. Brandt, WD9GET]

I have finally got my RPi NTP server set up referenced to a Thunderbolt 
PPS.
NTP is using the PPS and my stats look good, but when I run

     ntpq -c kerninfo

my output is:

     associd=0 status=0118 leap_none, sync_pps, 1 event, no_sys_peer,
     pll offset:            0.00753
     pll frequency:         -10.4492
     maximum error:         0.012
     estimated error:       1e-06
     kernel status:         pll nano
     pll time constant:     4
     precision:             1e-06
     frequency tolerance:   500
     pps frequency:         0
     pps stability:         0
     pps jitter:            0
     calibration interval   0
     calibration cycles:    0
     jitter exceeded:       0
     stability exceeded:    0
     calibration errors:    0

The pps frequency, stability, and jitter are all zero.

     dmesg | grep pps

and

      ppstest /dev/pps0

both indicate the kernel pps support is working.

Why isn't the kerninfo showing any info on the pps frequency, stability, 
and jitter?

--Keith