Provided by: systemtap-doc_3.1-3ubuntu0.1_all 

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