[Linuxptp-users] Fast reset after detection of a port's fault

[Joerg C. (LWE) <Chr...@li...>]

I have implemented time synchronization with ptp4l using software timestamping.
My requirement is to sync the slaves very fast after the master clock steps.
How can I make the slaves step immediately after they recognize a step of the master clock?

I tried this config file for the slave:

[global]
verbose                 1
time_stamping           software
slaveOnly               1
step_threshold          0.001
first_step_threshold    0.00001
fault_reset_interval    -128

[eth0.2]

When I stepped the master clock I had this result on the slave, no matter what value I use for
fault_reset_interval. I have always the s0 for 16 seconds.

ptp4l[20016.779]: master offset    -838788 s2 freq  -77766 path delay     37419
ptp4l[20017.778]: master offset   -1251433 s0 freq  -77766 path delay     37419
ptp4l[20017.779]: port 1: SLAVE to UNCALIBRATED on SYNCHRONIZATION_FAULT
ptp4l[20018.778]: master offset   -1669199 s0 freq  -77766 path delay     37454
ptp4l[20019.778]: master offset   -2119251 s0 freq  -77766 path delay     73117
ptp4l[20020.777]: master offset   -2544222 s0 freq  -77766 path delay     81722
ptp4l[20021.777]: master offset   -2959934 s0 freq  -77766 path delay     86377
ptp4l[20022.777]: master offset   -3370656 s0 freq  -77766 path delay     86377
ptp4l[20023.776]: master offset   -3827576 s0 freq  -77766 path delay    126573
ptp4l[20024.776]: master offset   -4256688 s0 freq  -77766 path delay    174966
ptp4l[20025.776]: master offset   -4702737 s0 freq  -77766 path delay    174966
ptp4l[20026.775]: master offset   -5128022 s0 freq  -77766 path delay    180869
ptp4l[20027.775]: master offset   -5539745 s0 freq  -77766 path delay    180869
ptp4l[20028.775]: master offset   -5926680 s0 freq  -77766 path delay    150756
ptp4l[20029.774]: master offset   -6337803 s0 freq  -77766 path delay    148828
ptp4l[20030.774]: master offset   -6754509 s0 freq  -77766 path delay    148828
ptp4l[20031.774]: master offset   -7167231 s0 freq  -77766 path delay    148828
ptp4l[20032.773]: master offset   -7584545 s0 freq  -77766 path delay    150756
ptp4l[20033.773]: master offset   -7977596 s0 freq  -77766 path delay    150756
ptp4l[20034.773]: master offset   -8410324 s1 freq -415350 path delay    150756
ptp4l[20036.773]: master offset    -158698 s2 freq -431379 path delay    145125
ptp4l[20036.773]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[20037.773]: master offset    -217699 s2 freq -437496 path delay    145125
ptp4l[20038.773]: master offset    -242286 s2 freq -440197 path delay    118919

Regards

Christian
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