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| =Major 2 Related Pages=
| | #REDIRECT [[Radarcape:NTP#NTP_stratum_1_server]] |
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| [[Radarcape:Software_Features_Major2|Radarcape Major 2 Features]] | |
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| [[Radarcape:Radarcape_Major_2_Feeder_Installation|Radarcape Major 2 Feeder Installation]]
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| [[Radarcape:Radarcape_Major_2_NTPD_Installation|Radarcape Major 2 NTPD Installation]]
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| =Radarcape Major 2 NTPD Installation=
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| This information was provided by a user, I will beautify it a little but need to redo it on a Radarcape for that.
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| ==Setup for Chrony==
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| Activate Chrony socket under Radarcape configuration menu:<br>
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| Radarcape Settings -> General -> NTP Reference Clock Data<br>
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| Publish time to socket for Chrony: Enabled (Socket: /var/run/chrony.radarcape.sock)<br>
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| Publish time to shared memory for NTPD or Chrony: Enabled (SHM segment: 0)
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| <source lang="bash">
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| $ sudo apt-get update
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| $ sudo apt-get install build-essential texinfo pps-tools
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| $ wget https://download.tuxfamily.org/chrony/chrony-3.1.tar.gz
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| $ tar xfz chrony-3.1.tar.gz
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| $ cd chrony-3.1
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| $ ./configure
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| $ make
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| $ sudo make install
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| $ sudo bash -c "sudo cat >> /etc/chrony.conf <<- EOF
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| minsamples 10
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| log tracking measurements statistics
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| logdir /var/log/chrony
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| driftfile /var/lib/chrony/chrony.drift
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| maxupdateskew 100.0
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| dumponexit
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| dumpdir /var/lib/chrony
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| pool pool.ntp.org iburst
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| refclock PPS /dev/pps0 lock RCD prefer
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| refclock SOCK /var/run/chrony.radarcape.sock offset 0.0 delay 0.0 refid RCD noselect
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| EOF"
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| $ sudo /usr/local/sbin/chronyd -f /etc/chrony.conf -s
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| # chronyc sources | |
| 210 Number of sources = 6
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| MS Name/IP address Stratum Poll Reach LastRx Last sample
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| ===============================================================================
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| #* PPS0 0 4 377 22 +501ns[ +765ns] +/- 694ns
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| #? RCD 0 4 377 21 +20ms[ +20ms] +/- 27us
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| ^- goblin.yuhu.biz 3 6 377 19 -1272us[-1272us] +/- 107ms
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| ^- 212.70.148.20 2 6 377 20 -534us[ -534us] +/- 33ms
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| ^- 212.70.148.13 2 6 377 20 +86us[ +86us] +/- 48ms
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| ^- 89.190.220.94 3 6 377 18 -668us[ -668us] +/- 73ms
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| ------------------------------
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| </source>
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| ==Setup for NTPD==
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| <source lang="bash">
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| # sudo apt-get install build-essential texinfo pps-tools cpufrequtils libcap-dev
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| # systemctl disable ondemand
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| # echo 'GOVERNOR="performance"' > /etc/default/cpufrequtils
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| # systemctl restart cpufrequtils
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| # cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
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| performance
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| # ppstest /dev/pps0 # Use Ctrl+C to stop;
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| trying PPS source "/dev/pps0"
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| found PPS source "/dev/pps0"
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| ok, found 1 source(s), now start fetching data...
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| source 0 - assert 1495808693.999994810, sequence: 119877 - clear 0.000000000, sequence: 0
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| source 0 - assert 1495808694.999994736, sequence: 119878 - clear 0.000000000, sequence: 0
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| source 0 - assert 1495808696.000003486, sequence: 119879 - clear 0.000000000, sequence: 0
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| source 0 - assert 1495808697.000012458, sequence: 119880 - clear 0.000000000, sequence: 0
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| source 0 - assert 1495808697.999984217, sequence: 119881 - clear 0.000000000, sequence: 0
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| ^C
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| # wget http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ntp-4.2.8p7.tar.gz
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| # tar zxvf ntp-4.2.8p7.tar.gz
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| # cd ntp-4.2.8p7
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| # ./configure --enable-linuxcaps --enable-SHM --with-NMEA --with-ATOM
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| # make -j4
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| # sudo make install
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| # mkdir /var/lib/ntp/
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| # touch /var/lib/ntp/ntp.drift
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| # sudo bash -c "sudo cat >> /etc/ntp.conf <<- EOF
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| driftfile /var/lib/ntp/ntp.drift
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| leapfile /etc/ntp/leap-seconds.list
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| #statsdir /var/log/ntpstats/
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| statistics loopstats peerstats clockstats
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| filegen loopstats file loopstats type day enable
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| filegen peerstats file peerstats type day enable
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| filegen clockstats file clockstats type day enable
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| pool bg.pool.ntp.org iburst
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| server 192.168.10.9 minpoll 5 maxpoll 5 iburst prefer
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| # SHM reference
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| server 127.127.28.0 minpoll 4 maxpoll 4 prefer
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| fudge 127.127.28.0 time1 0.0 refid GPS stratum 15
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| # PPS reference
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| # flag3 - kernel PPS discipline: 0 for disable (default), 1 for enable
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| server 127.127.22.0 minpoll 4 maxpoll 4 prefer
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| fudge 127.127.22.0 flag3 1 refid PPS
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| EOF"
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| Start the NTPD daemon using:
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| # /usr/local/sbin/ntpd -c /etc/ntp.conf
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| Verify that it is running:
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| # ntpq -4nc peers
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| remote refid st t when poll reach delay offset jitter
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| ==============================================================================
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| bg.pool.ntp.org .POOL. 16 p - 64 0 0.000 0.000 0.004
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| *192.168.10.9 212.70.148.17 3 u 3 32 377 0.226 0.680 0.057
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| 127.127.28.0 .GPS. 15 l 8 16 377 0.000 -19.901 0.037
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| o127.127.22.0 .PPS. 0 l 7 16 377 0.000 0.001 0.004
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| +212.70.148.19 80.96.120.252 2 u 66 64 377 2.028 0.041 0.326
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| +212.70.148.16 80.96.120.252 2 u 52 64 377 10.207 -1.061 0.292
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| +212.70.148.11 95.87.227.232 3 u 55 64 377 1.812 -1.852 0.582
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| -212.70.148.17 138.96.64.10 2 u 54 64 377 2.252 -2.698 0.470
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| +212.70.148.20 80.96.120.252 2 u 52 64 377 2.497 -0.073 0.233
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| +92.247.168.103 93.123.92.131 2 u 59 64 377 9.263 0.543 0.369
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| +85.11.191.119 87.120.164.97 2 u 60 64 377 2.503 -0.382 0.378
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| +93.123.92.131 .GPS. 1 u 49 64 377 2.438 0.156 0.483
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| </source>
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| You should see the lines ".GPS." and ".PPS." in the output of "ntpq -4nc peers", and the word "kern" should be present in the output of an ntpq -c rv command:
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| <source lang="bash">
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| # ntpq -c rv 127.0.0.1
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| associd=0 status=011d leap_none, sync_pps, 1 event, kern,
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| processor="armv7l", system="Linux/4.1.18-ti-r57", leap=00, stratum=1,
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| precision=-18, rootdelay=0.000, rootdisp=1.015, refid=PPS,
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| reftime=dcd2b9bf.b5857be0 Fri, May 26 2017 14:27:11.709,
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| clock=dcd2b9c1.10280e44 Fri, May 26 2017 14:27:13.063, peer=40682, tc=4,
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| mintc=3, offset=-0.000793, frequency=-45.646, sys_jitter=0.003815,
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| clk_jitter=0.002, clk_wander=0.100
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| </source>
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