spawn_seeker.stp - List which processes spawning others

  This script once a minute prints out sorted lists showing which
  processes and executables are spawning the most additional tasks on
  the system.

$ stap ./spawn_seeker.stp 
^C
Sun Apr 19 22:57:02 2015 EDT

        execname(   PID)    spawned (percent)
            make( 18559)        576 ( 39%)
            make( 21070)        325 ( 22%)
            make( 18959)        176 ( 12%)
            make( 16030)        166 ( 11%)
            make( 20118)        119 (  8%)
            make( 20476)         59 (  4%)
            make( 20723)         16 (  1%)
             gcc( 20749)          3 (  0%)
             gcc( 20775)          3 (  0%)
             gcc( 20790)          3 (  0%)
             gcc( 20758)          2 (  0%)
             gcc( 20781)          2 (  0%)
             gcc( 20793)          2 (  0%)
            make( 12759)          1 (  0%)
              sh( 20748)          1 (  0%)
              sh( 20774)          1 (  0%)
              sh( 20789)          1 (  0%)
              sh( 20801)          1 (  0%)
             gcc( 20802)          1 (  0%)
             gcc( 20803)          1 (  0%)

        execname    spawned (percent)
              sh        637 ( 43%)
             gcc        605 ( 41%)
            make        217 ( 14%)