Hi, I'm not exactly sure what this tool is doing, but most likely explanation for the difference between those clocks is due to leap second offset (currently 37 seconds).
I believe RT should be UTC, and the PHC should be TAI (37 seconds in front of TAI). phc2sys should add the offset (either from config or from the announce message). Have you configured that? Regards Dennis -----Original Message----- From: Elder Costa <elder.co...@timpelmedical.com> Sent: Wednesday, May 24, 2023 1:20 PM To: linuxptp-users@lists.sourceforge.net Subject: [Linuxptp-users] Offset between TAI and PHC I am getting the result below with the check_clocks utility. downloaded from: https://tsn.readthedocs.io/timesync.html#checking-clocks-synchronization cve@cve-sbc-flt2:~/work$ sudo ./check_clocks -d enp3s0 -v Dumping timestamps and deltas rt tstamp: 1684764184805696608 tai tstamp: 1684764184805696893 phc tstamp: 1684764221805735928 rt latency: 136 tai latency: 120 phc latency: 7472 phc-rt delta: 37000039320 phc-tai delta: 37000039035 phc-tai delta is greater than 50 usec ! TAI offset set in kernel is not correct ! PTP peer port state and/or offset are messed up ! Please verify ptp4l and phc config and restart them if necessary to synchronize the clocks ! I am running ptp4l and phc2sys to keep the system clocks of the master and slave synchronized. Commands and configurations below. What am I missing? # Sincronize master's PTP with system clock (HW timestamp) sudo phc2sys -c enp3s0 -s CLOCK_REALTIME -q -m -w --step_threshold=0.001 # Sincronize slave's system clock with PTP (HW timestamp) sudo phc2sys -s enp3s0 -c CLOCK_REALTIME -q -m -w --step_threshold=0.001 # Test configuration of the Fitlet acting as a master [global] serverOnly 1 BMCA noop use_syslog 0 verbose 1 [enp3s0] # Test configuration of the Fitlet acting as a master [global] clientOnly 1 BMCA noop step_threshold 0.001 use_syslog 0 verbose 1 [enp3s0] _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
