Hello, I have been running ptp4l on various intel FPGA Arria 10 SoC implementations, including one with the 10Gb MAC and a few with the HPS EMAC (stmmicro 1GbE) and it's all working very well. One issue we're seeing is, if our A10 slave has been sync'd with a GM clock, and then that GM goes away (power cycled or even cable disconnected/reconnected) - our A10 ptp4l app won't resync to that same GM. When the cable is reconnected, ptp4l does indeed select that same GM briefly as the BMC, but then it loses it upon announce receipt timeout expires and it never comes back. I tried higher thresholds for annoucereceipttimeout, but it didn't help. Here is a print at logging level 6 of the sequence. It starts synchronized then at ptp4l[1320.551] I disconnect the cable - and then reconnect it about 15 seconds later.
Any help or insight would be greatly appreciated. Thank you, John ptp4l[1288.410]: rms 9 max 18 freq -12944 +/- 12 delay 258 +/- 0 ptp4l[1292.430]: rms 8 max 18 freq -12946 +/- 10 delay 258 +/- 1 ptp4l[1296.450]: rms 8 max 19 freq -12944 +/- 11 delay 259 +/- 0 ptp4l[1300.455]: rms 8 max 18 freq -12943 +/- 11 delay 258 +/- 1 ptp4l[1304.478]: rms 8 max 15 freq -12945 +/- 11 delay 256 +/- 1 ptp4l[1308.498]: rms 9 max 20 freq -12941 +/- 12 delay 256 +/- 0 ptp4l[1312.514]: rms 9 max 15 freq -12942 +/- 12 delay 259 +/- 1 ptp4l[1316.532]: rms 7 max 17 freq -12942 +/- 9 delay 260 +/- 0 ptp4l[1320.551]: port 1: SLAVE to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES ptp4l[1320.551]: selected best master clock d88039.fffe.d8b76f ptp4l[1320.551]: assuming the grand master role [ 1320.839868] stmmaceth ff800000.ethernet eth0: Link is Down ptp4l[1320.840]: port 1: link down ptp4l[1320.840]: port 1: MASTER to FAULTY on FAULT_DETECTED (FT_UNSPECIFIED) ptp4l[1320.940]: selected best master clock d88039.fffe.d8b76f ptp4l[1320.940]: assuming the grand master role [ 1337.840004] stmmaceth ff800000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off ptp4l[1337.838]: port 1: link up ptp4l[1337.926]: port 1: FAULTY to LISTENING on INIT_COMPLETE ptp4l[1338.200]: clockcheck: clock jumped forward or running faster than expected! ptp4l[1340.936]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES ptp4l[1340.936]: selected best master clock d88039.fffe.d8b76f ptp4l[1340.936]: assuming the grand master role ptp4l[1341.238]: port 1: new foreign master 000496.fffe.9abb7f-4 ptp4l[1343.241]: selected best master clock 000496.fffe.9abb7f ptp4l[1343.241]: running in a temporal vortex ptp4l[1343.241]: port 1: MASTER to UNCALIBRATED on RS_SLAVE ptp4l[1344.110]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED ptp4l[1344.228]: rms 17456413559 max 57012408588 freq +1011056 +/- 5703716 delay 261 +/- 2 ptp4l[1345.607]: port 1: SLAVE to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES ptp4l[1345.607]: selected best master clock d88039.fffe.d8b76f ptp4l[1345.607]: assuming the grand master role
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