Re: gpsd + chrony + pps

[Stéphane Péneau]

Hi !

Le 18/06/2020 à 22:38, Gary E. Miller a écrit :
> That would be helpful, otheerwise we are jsut guessing. 

Here they are the exact results

gpsd:

DEVICES="/dev/ttyS1 /dev/pps0"
# Other options you want to pass to gpsd
GPSD_OPTIONS="-n -b -s 115200"
# Automatically hot add/remove USB GPS devices via gpsdctl
USBAUTO="false"

=====================================================

chrony.conf:

refclock SHM 0 refid GNSS precision 1e-1 offset 0.150 delay 0.2 noselect
refclock SOCK /var/run/chrony.ttyS1.sock refid PPS2 lock GNSS

Results:

MS Name/IP address         Stratum Poll Reach LastRx Last sample
===============================================================================
#? GNSS                          0   4   377    13    +97ms[ +97ms] +/-  
200ms
#? PPS2                          0   4     0     -     +0ns[ +0ns] 
+/-    0ns
^+ wakatobi.ordimatic.net        2   6   377    61 -5613us[-5419us] 
+/-   60ms
^? sys.gegeweb.eu                0   6     0     -     +0ns[ +0ns] 
+/-    0ns
^* regar42.fr                    3   6   377    60 +1059us[+1251us] 
+/-   22ms
^+ ntp10.kashra-server.com       2   6   375    59 -2258us[-2258us] 
+/-   42ms

================================================================

chrony.conf

refclock SHM 0 refid GNSS precision 1e-1 offset 0.150 delay 0.2 noselect
refclock SOCK /var/run/chrony.pps0.sock refid PPS2 lock GNSS


Results:

MS Name/IP address         Stratum Poll Reach LastRx Last sample
===============================================================================
#? GNSS                          0   4   377    11    +83ms[ +83ms] +/-  
200ms
#* PPS2                          0   4   377     9 -2863ns[-5073ns] +/- 
1918ns
^- ns0.serverhouse.com           2   6   177    12    -35ms[ -35ms] +/-  
105ms
^- ntp4.kashra-server.com        2   6   177    11    -28ms[ -28ms] 
+/-   86ms
^- time.cloudflare.com           3   6   177    11    -21ms[ -21ms] 
+/-   53ms
^- ntp.altinea.fr                2   6   177    12 -9001us[-9003us] +/-  
116ms


Stéphane