Hi,
I am Kuralamudhan Ramakrishnan working in NetApp, Munich. I am currently
working in a project to get hardware time stamping between source and
destination server using Linux time stamping options. I am using i40e (Driver:
Intel(R) Ethernet Connection XL710 Network Driver - version 1.0.11-k) Intel
Network Interface Controller. The linux 3.18 support bytestream time stamping,
that is Transmit Hardware Timestamping and it doesn't support the Receive
Hardware Time stamping for TCP socket. I like to know the vendor specific API's
which could support the Hardware timestamping for the TCP packets(like
i40e_ptp_gettime?).
My NIC support the following time stamp capabilities.
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: 2
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-event (HWTSTAMP_FILTER_PTP_V2_L4_EVENT)
ptpv2-l4-sync (HWTSTAMP_FILTER_PTP_V2_L4_SYNC)
ptpv2-l4-delay-req (HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ)
ptpv2-l2-event (HWTSTAMP_FILTER_PTP_V2_L2_EVENT)
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)
ptpv2-sync (HWTSTAMP_FILTER_PTP_V2_SYNC)
ptpv2-delay-req (HWTSTAMP_FILTER_PTP_V2_DELAY_REQ)
I like to know whether there is any other Intel NIC which have the capability
for SOF_TIMESTAMPING_TX_ACK, I require this time stamping to calculate the
precise RTT measurement between source and destination.
With kind regards,
Kuralamudhan Ramakrishnan
NetApp
Sonnenallee 1
D-85551 Kirchheim-Heimstetten
Munich
+49(89)900.59-6242 Direct Phone
+49(0176)4156.1259 Mobile Phone
kuralamudhan.ramakrish...@netapp.com
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