Provided by:
systemtap-doc_0.0.20090214-1ubuntu1_all 
NAME
probe_signal.sys_tgkill - Fires when the kernel function
<command>tgkill</command>
SYNOPSIS
probe signal.sys_tgkill
VALUES
sig
The specific kill signal sent to the process The
<command>tgkill</command> call is similar to
<command>tkill</command>, except that it also allows the caller to
specify the thread group ID of the thread to be signalled. This
protects against TID reuse.
pid
The PID of the thread receiving the kill signal
tgid
The thread group ID of the thread receiving the kill signal
DESCRIPTION
sends a kill signal to a specific thread group
AUTHOR
William Cohen <wcohen@redhat.com>