Analysis of sampling i386-softmmu (pid 310) every 1 millisecond
Call graph:
    5770 Thread_2503
      5770 0x3a2bd
        5770 0x14f3d
          5770 __sigwait
            5770 __sigwait
    5770 Thread_2603
      5770 thread_start
        5770 _pthread_start
          5770 __NSThread__main__
            5770 -[NSThread main]
              5770 -[NSUIHeartBeat _heartBeatThread:]
                5770 -[NSConditionLock lockWhenCondition:]
                  5770 -[NSConditionLock lockWhenCondition:beforeDate:]
                    5764 -[NSCondition waitUntilDate:]
                      5734 pthread_cond_timedwait_relative_np
                        3378 _pthread_cond_wait
                          3307 semaphore_timedwait_signal_trap
                            3307 semaphore_timedwait_signal_trap
                          60 pthread_mutex_lock
                            56 semaphore_wait_trap
                              56 semaphore_wait_trap
                            3 pthread_mutex_lock
                            1 __spin_lock
                              1 __spin_lock
                          8 _pthread_cond_wait
                          3 _pthread_cond_remove
                            2 __spin_lock
                              2 __spin_lock
                            1 _pthread_cond_remove
                        2354 0xffffffff
                          2354 _sigtramp
                            2344 _sigtramp
                            9 0x78f8
                              7 0x2e04
                                7 0x2dbd
                                  5 gettimeofday
                                    5 __gettimeofday
                                      3 __gettimeofday
                                      2 __nanotime
                                        2 __nanotime
                                  2 __commpage_gettimeofday
                                    2 __commpage_gettimeofday
                              1 0x2fd1
                                1 0x2fd1
                              1 0x2fdb
                                1 0x2fdb
                            1 0x7922
                              1 0x8c549
                                1 0x8c549
                        1 __spin_lock
                          1 __spin_lock
                        1 semaphore_timedwait_signal_trap
                          1 semaphore_timedwait_signal_trap
                      24 CFDateGetAbsoluteTime
                        24 CFDateGetAbsoluteTime
                      3 CFAbsoluteTimeGetCurrent
                        1 CFAbsoluteTimeGetCurrent
                        1 __commpage_gettimeofday
                          1 __commpage_gettimeofday
                        1 dyld_stub___commpage_gettimeofday
                          1 dyld_stub___commpage_gettimeofday
                      1 -[NSCondition waitUntilDate:]
                      1 -[__NSCFDate timeIntervalSinceReferenceDate]
                        1 -[__NSCFDate timeIntervalSinceReferenceDate]
                      1 pthread_self
                        1 pthread_self
                    3 -[NSConditionLock lockWhenCondition:beforeDate:]
                    2 objc_msgSend_fpret
                      2 objc_msgSend_fpret
                    1 floor$fenv_access_off
                      1 floor$fenv_access_off
    5770 Thread_2703
      5770 thread_start
        5770 _pthread_start
          5770 fe_fragment_thread
            5770 pthread_cond_wait$UNIX2003
              5770 __semwait_signal
                5770 __semwait_signal
    5770 Thread_2803
      5770 thread_start
        5770 _pthread_start
          5770 CMMConvTask(void*)
            5770 pthreadSemaphoreWait(t_pthreadSemaphore*)
              5770 pthread_cond_wait$UNIX2003
                5770 __semwait_signal
                  5770 __semwait_signal

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

Sort by top of stack, same collapsed (when >= 5):
        __semwait_signal        11540
        __sigwait        5770
        semaphore_timedwait_signal_trap        3308
        _sigtramp        2344
        semaphore_wait_trap        56
        CFDateGetAbsoluteTime        24
        _pthread_cond_wait        8