Hi I use linuxptp with the following settings: master: [global] dataset_comparison G.8275.x masterOnly 1 logAnnounceInterval -3 logSyncInterval -4 logMinDelayReqInterval -4 tx_timestamp_timeout 5 clockClass 6 clockAccuracy 0x21 offsetScaledLogVariance 0x4e5d domainNumber 24 network_transport L2
slave: [global] dataset_comparison G.8275.x logAnnounceInterval -3 logSyncInterval -4 logMinDelayReqInterval -4 tx_timestamp_timeout 5 domainNumber 24 network_transport L2 >From time to time there is a problem with ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES on the slave side: ptp4l[427119.431]: rms 16303 max 43131 freq -16891 +/- 3592 delay 15888 +/- 2066 ptp4l[427120.550]: rms 10060 max 19890 freq -17425 +/- 2254 delay 16322 +/- 2517 ptp4l[427121.691]: rms 9415 max 23956 freq -18151 +/- 2154 delay 17059 +/- 594 ptp4l[427122.810]: rms 10578 max 20124 freq -17774 +/- 2426 delay 14718 +/- 2239 ptp4l[427123.472]: port 1: SLAVE to LISTENING on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES ptp4l[427123.472]: selected local clock 48df37.fffe.52407d as best master ptp4l[427123.972]: selected local clock 48df37.fffe.52407d as best master ptp4l[427124.460]: selected local clock 48df37.fffe.52407d as best master ptp4l[427124.844]: selected local clock 48df37.fffe.52407d as best master ptp4l[427125.248]: selected local clock 48df37.fffe.52407d as best master ptp4l[427125.688]: selected local clock 48df37.fffe.52407d as best master .... If I enable debugging on the master, I see an error: ptp4l[402.740]: timed out while polling for tx timestamp ptp4l[402.740]: increasing tx_timestamp_timeout may correct this issue, but it is likely caused by a driver bug The problem with the tx timestamp is not frequent, about once every 20 minutes. You can help by answering a few questions: 1) Are ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES errors normal? Or there shouldn't be any? 2) Maybe someone has encountered such errors and knows how to fix them? To set the tx_timestamp I use the code https://elixir.bootlin.com/linux/v4.9.322/source/drivers/net/ethernet/intel/e1000e/netdev.c#L1198 Best regards, Vyasheslav
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