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

NAME
probe::signal.send_sig_queue.return - Queuing a signal to a process completed
SYNOPSIS
signal.send_sig_queue.return
VALUES
name
Name of the probe point
retstr
Return value as a string
SystemTap Tapset Reference March 2016 PROBE::SIGNAL.SEND(3stap)