[Webkit-unassigned] [Bug 49146] REGRESSION: Hang loading Flash ads at Mac Ach and Hulu

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=49146





--- Comment #4 from Jon <jon at jonshier.com>  2010-11-08 13:37:16 PST ---
Sure, here's the Flash plugin process sample: 

Sampling process 99569 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling WebKitPluginHost (pid 99569) every 1 millisecond
Call graph:
    2483 Thread_259086   DispatchQueue_1: com.apple.main-thread  (serial)
      2483 0x6d2fb04d
        2483 0x6d2fb40f
          2483 -[NSApplication run]
            2483 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
              2483 _DPSNextEvent
                2483 BlockUntilNextEventMatchingListInMode
                  2483 ReceiveNextEventCommon
                    2483 RunCurrentEventLoopInMode
                      2483 CFRunLoopRunInMode
                        2483 CFRunLoopRunSpecific
                          2482 __CFRunLoopRun
                            2473 mach_msg
                              2473 mach_msg_trap
                            7 __CFRunLoopDoSources0
                              7 main
                                7 0x1416031c
                                  3 0x1415fc9b
                                    3 0x14068757
                                      1 0x1406b700
                                        1 0x14066a31
                                      1 0x1406bf25
                                        1 0x14062825
                                          1 0x1415180c
                                            1 0x14147702
                                              1 0x140f0227
                                      1 0x1414aa1c
                                        1 0x141499ae
                                          1 main
                                  2 0x1415faa6
                                    1 0x140518f2
                                    1 0x140518f5
                                  1 0x1415f9c2
                                    1 0x1404fa6a
                                      1 0x13f7f5f0
                                  1 0x1415fa98
                                    1 0x14112985
                                      1 0x1410f131
                            1 __CFRunLoopDoObservers
                              1 CFQSortArray
                                1 CFSortIndexes
                                  1 malloc_default_zone
                            1 mach_port_extract_member
                              1 mach_msg
                                1 mach_msg_trap
                          1 CFRunLoopRunSpecific
    2483 Thread_259087   DispatchQueue_2: com.apple.libdispatch-manager  (serial)
      2483 start_wqthread
        2483 _pthread_wqthread
          2483 _dispatch_worker_thread2
            2483 _dispatch_queue_invoke
              2483 _dispatch_mgr_invoke
                2483 kevent
    2483 Thread_259093
      2483 thread_start
        2483 _pthread_start
          2483 unregister_ShockwaveFlash
            2483 unregister_ShockwaveFlash
              2483 0x13e18d34
                2483 unregister_ShockwaveFlash
                  2483 pthread_cond_wait$UNIX2003
                    2483 _pthread_cond_wait
                      2483 __semwait_signal
    2483 Thread_259094
      2483 thread_start
        2483 _pthread_start
          2483 unregister_ShockwaveFlash
            2483 unregister_ShockwaveFlash
              2483 0x13e18d34
                2483 unregister_ShockwaveFlash
                  2483 pthread_cond_wait$UNIX2003
                    2483 _pthread_cond_wait
                      2483 __semwait_signal
    2483 Thread_259095
      2483 thread_start
        2483 _pthread_start
          2483 unregister_ShockwaveFlash
            2483 unregister_ShockwaveFlash
              2483 0x13e18d34
                2483 unregister_ShockwaveFlash
                  2483 pthread_cond_wait$UNIX2003
                    2483 _pthread_cond_wait
                      2483 __semwait_signal
    2483 Thread_259096
      2483 thread_start
        2483 _pthread_start
          2483 unregister_ShockwaveFlash
            2483 unregister_ShockwaveFlash
              2483 0x13e18d34
                2483 unregister_ShockwaveFlash
                  2483 pthread_cond_wait$UNIX2003
                    2483 _pthread_cond_wait
                      2483 __semwait_signal
    2483 Thread_259123
      2483 thread_start
        2483 _pthread_start
          2483 unregister_ShockwaveFlash
            2483 unregister_ShockwaveFlash
              2466 0x14134822
                2466 unregister_ShockwaveFlash
                  2465 pthread_cond_timedwait_relative_np
                    2465 _pthread_cond_wait
                      2459 semaphore_timedwait_signal_trap
                      5 _pthread_cond_remove
                        5 __spin_lock
                      1 _pthread_cond_wait
                  1 pthread_mutex_unlock
              17 0x141348b8
                17 unregister_ShockwaveFlash
                  17 pthread_cond_timedwait_relative_np
                    17 _pthread_cond_wait
                      17 semaphore_timedwait_signal_trap

Total number in stack (recursive counted multiple, when >=5):
        16       unregister_ShockwaveFlash
        6       _pthread_cond_wait
        5       _pthread_start
        5       thread_start

Sort by top of stack, same collapsed (when >= 5):
        __semwait_signal        9932
        kevent        2483
        semaphore_timedwait_signal_trap        2476
        mach_msg_trap        2474
        __spin_lock        5
Sample analysis of process 99569 written to file /dev/stdout

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