tx_timestamping Example

This demonstrates the tx_timestamping example application.

From Onload 8.1 onwards this example defaults to using Linux format timestamps for TCP. Use the --stream option to instead use the Onload proprietary format.

# EF_TX_TIMESTAMPING=3 onload ./tx_timestamping --proto tcp --ioctl eth4
oo:tx_timestamping[16139]: Using OpenOnload 201509 Copyright 2006-2015 Solarflare Communications, 2002-2005 Level 5 Networks [4]
TCP listening on port 9000
 TCP connection accepted
Accepted SIOCHWTSTAMP ioctl.
Selecting hardware timestamping mode.
Packet 1 - 27 bytes
Timestamp for 27 bytes:
First sent timestamp 1453436034.615029223
Last sent timestamp 0.000000000

# nc <server1 ip> 9000
abcdefghijklmnopqrstuvwxyz
abcdefghijklmnopqrstuvwxyz  (echoed back from server 1)