Re: [Linuxptp-users] Hardware PTP clock synchronization

[Гаврилов А. <le...@im...>]

Thanks for your interest in my problem!

lspci output:
Intel 82576 Gigabit ethernet controller (rev 01)
Intel 82576 Gigabit ethernet controller (rev 01)

ethtool output:
ethtool -T p16p1
Time stamping parameters for p16p1:
Capabilities:
        hardware-transmit     (SOF_TIMESTAMPING_TX_HARDWARE)
        software-transmit     (SOF_TIMESTAMPING_TX_SOFTWARE)
        hardware-receive      (SOF_TIMESTAMPING_RX_HARDWARE)
        software-receive      (SOF_TIMESTAMPING_RX_SOFTWARE)
        software-system-clock (SOF_TIMESTAMPING_SOFTWARE)
        hardware-raw-clock    (SOF_TIMESTAMPING_RAW_HARDWARE)
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
        off                   (HWTSTAMP_TX_OFF)
        on                    (HWTSTAMP_TX_ON)
Hardware Receive Filter Modes:
        none                  (HWTSTAMP_FILTER_NONE)
        ptpv1-l4-sync         (HWTSTAMP_FILTER_PTP_V1_L4_SYNC)
        ptpv1-l4-delay-req    (HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ)
        ptpv2-l4-sync         (HWTSTAMP_FILTER_PTP_V2_L4_SYNC)
        ptpv2-l4-delay-req    (HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ)
        ptpv2-l2-sync         (HWTSTAMP_FILTER_PTP_V2_L2_SYNC)
        ptpv2-l2-delay-req    (HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ)
        ptpv2-event           (HWTSTAMP_FILTER_PTP_V2_EVENT)

> You are on a modern kernel. Please do not use -p /dev/ptpX option. Let the program automatically determine it.

Ok, it works.

> How about just increasing the tx_timestamp_timeout configuration option to 100 or 1000?

Set a tx_timestamp_timeout value to 1000 in configuration file.

> Also please re-try with -P, for peer to peer delay mechanism.

ptp4l -2 -i p16p1 -P -m -H -s
ptp4l[728.271]: selected /dev/ptp0 as PTP clock
ptp4l[728.288]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[728.288]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[729.462]: port 1: new foreign master ece555.fffe.2de639-2
ptp4l[733.452]: selected best master clock ece555.fffe.2de639
ptp4l[733.452]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l[734.458]: recvmsg tx timestamp failed: Resource temporarily unavailable
ptp4l[734.458]: port 1: send peer delay request failed
ptp4l[734.458]: port 1: UNCALIBRATED to FAULTY on FAULT_DETECTED

> I wrote the original igb ptp code, but I never tested the 82576
because I don't have one. I am not sure if Intel tested this either.

Richard, you are an employee Intel?
Or a driver for Intel card are developing people who do not work in Intel?
I wrote to tech support intel two months ago, they said that my question is redirected to a deeper level.
To this day there is no response from Intel.

> Basically, the 82576 is not a very reliable part for timestamping...
What kind of adapter would you recommend instead of 82576? (gigabit).


In any case, thank you very much!