Hi Richard, I am running linuxptp in multiple boxes which sync to the same master clock and all have the same configuration. They've been running fine for weeks now, then I found on one of the box the system clock was like an hour ahead. I checked linuxptp log file and found: clockcheck: clock jumped backward or running slower than expected! Below is the snapshot of the log file.
Regards, Calvin Pham [442421.922] selected /dev/ptp0 as PTP clock [442421.922] uds: sendto failed: No such file or directory [442421.922] poll failed [442421.923] port 1: INITIALIZING to LISTENING on INIT_COMPLETE [442421.923] port 0: INITIALIZING to LISTENING on INIT_COMPLETE [442422.930] Waiting for ptp4l... [442423.323] port 1: new foreign master 00a069.fffe.018829-1 [442423.939] Waiting for ptp4l... [442424.955] Waiting for ptp4l... [442425.956] Waiting for ptp4l... [442426.969] Waiting for ptp4l... [442427.702] selected best master clock 00a069.fffe.018829 [442427.702] updating UTC offset to 37 [442427.702] port 1: LISTENING to UNCALIBRATED on RS_SLAVE [442427.980] Waiting for ptp4l... [442428.981] Waiting for ptp4l... [442429.891] master offset 1154982191489 s0 freq -900000000 path delay -29924626 [442429.984] Waiting for ptp4l... [442430.988] master offset 1155075494051 s1 freq -738210234 path delay -28434999 [442430.990] Waiting for ptp4l... [442432.075] Waiting for ptp4l... [442433.082] Waiting for ptp4l... [442434.084] Waiting for ptp4l... [442435.085] Waiting for ptp4l... [442436.087] Waiting for ptp4l... [442437.088] Waiting for ptp4l... [442438.090] Waiting for ptp4l... [442439.091] Waiting for ptp4l... [442440.093] Waiting for ptp4l... [442441.095] Waiting for ptp4l... [442442.098] Waiting for ptp4l... [442443.100] Waiting for ptp4l... [442443.496] port 1: UNCALIBRATED to LISTENING on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES [442443.496] selected local clock ac1f6b.fffe.600d84 as best master [442443.786] clockcheck: clock jumped backward or running slower than expected! [442444.107] clockcheck: clock jumped backward or running slower than expected! [442444.248] clockcheck: clock jumped backward or running slower than expected! [442444.468] clockcheck: clock jumped backward or running slower than expected! [442444.531] Waiting for ptp4l... [442444.886] clockcheck: clock jumped backward or running slower than expected! [442445.089] clockcheck: clock jumped backward or running slower than expected! [442445.243] clockcheck: clock jumped backward or running slower than expected! [442445.528] clockcheck: clock jumped backward or running slower than expected! [442445.570] Waiting for ptp4l... [442445.792] clockcheck: clock jumped backward or running slower than expected! [442445.902] clockcheck: clock jumped backward or running slower than expected! [442446.110] clockcheck: clock jumped backward or running slower than expected! [442446.221] clockcheck: clock jumped backward or running slower than expected! [442446.337] clockcheck: clock jumped backward or running slower than expected! [442446.526] clockcheck: clock jumped backward or running slower than expected! [442446.612] Waiting for ptp4l... [442446.739] clockcheck: clock jumped backward or running slower than expected! [442446.952] clockcheck: clock jumped backward or running slower than expected! [442447.084] clockcheck: clock jumped backward or running slower than expected! [442447.432] clockcheck: clock jumped backward or running slower than expected! [442447.434] selected best master clock 00a069.fffe.018829 [442447.434] updating UTC offset to 37 [442447.434] port 1: LISTENING to UNCALIBRATED on RS_SLAVE [442447.570] clockcheck: clock jumped backward or running slower than expected! [442447.658] Waiting for ptp4l...
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