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

NAME
function::task_stime - System time of the current task
SYNOPSIS
task_stime:long()
ARGUMENTS
None
DESCRIPTION
Returns the system time of the current task in cputime. Does not include any time used by other tasks in
this process, nor does it include any time of the children of this task.
SystemTap Tapset Reference March 2016 FUNCTION::TASK_STIME(3stap)