Analysis of sampling qemu-control (pid 587) every 1 millisecond
Call graph:
    5493 Thread_2903
      5493 0x249d
        5493 0x2576
          5493 NSApplicationMain
            5493 -[NSApplication run]
              5493 -[NSApplication sendEvent:]
                5493 -[NSNotificationCenter postNotificationName:object:]
                  5493 -[NSNotificationCenter postNotificationName:object:userInfo:]
                    5493 _CFXNotificationPostNotification
                      5493 __CFXNotificationPost
                        5493 _nsnote_callback
                          5493 0x3810
                            5493 _CF_forwarding_prep_0
                              5493 ___forwarding___
                                5493 -[NSDistantObject methodSignatureForSelector:]
                                  5493 -[NSConnection sendInvocation:internal:]
                                    5493 CFRunLoopRunInMode
                                      5493 CFRunLoopRunSpecific
                                        5493 mach_msg
                                          5493 mach_msg_trap
                                            5493 mach_msg_trap
    5493 Thread_2a03
      5493 thread_start
        5493 _pthread_start
          5493 __NSThread__main__
            5493 -[NSThread main]
              5493 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:]
                5493 CFRunLoopRunInMode
                  5493 CFRunLoopRunSpecific
                    5493 mach_msg
                      5493 mach_msg_trap
                        5493 mach_msg_trap
    5493 Thread_2b03
      5493 thread_start
        5493 _pthread_start
          5493 select$DARWIN_EXTSN
            5493 select$DARWIN_EXTSN
    5493 Thread_2c03
      5493 thread_start
        5493 _pthread_start
          5493 CFURLCacheWorkerThread(void*)
            5493 CFRunLoopRunInMode
              5493 CFRunLoopRunSpecific
                5493 mach_msg
                  5493 mach_msg_trap
                    5493 mach_msg_trap
    5493 Thread_2d03
      5493 thread_start
        5493 _pthread_start
          5492 kevent
            5492 kevent
          1 __monitor_file_descriptor__
            1 __monitor_file_descriptor__

Total number in stack (recursive counted multiple, when >=5):

Sort by top of stack, same collapsed (when >= 5):
        mach_msg_trap        16479
        select$DARWIN_EXTSN        5493
        kevent        5492