Provided by: systemtap-doc_2.9-2ubuntu2_all 

NAME
probe::netdev.hard_transmit - Called when the devices is going to TX (hard)
SYNOPSIS
netdev.hard_transmit
VALUES
protocol
The protocol used in the transmission
dev_name
The device scheduled to transmit
truesize
The size of the data to be transmitted.
length
The length of the transmit buffer.
SEE ALSO
tapset::networking(3stap)
SystemTap Tapset Reference April 2016 PROBE::NETDEV.HARD(3stap)