Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
probe::tcp.sendmsg - Sending a tcp message
SYNOPSIS
tcp.sendmsg
VALUES
sock
Network socket
name
Name of this probe
size
Number of bytes to send
family
IP address family
CONTEXT
The process which sends a tcp message
SystemTap Tapset Reference March 2016 PROBE::TCP.SENDMSG(3stap)