66 
  67   enum SafepointingThread {
  68       _null_thread  = 0,
  69       _vm_thread    = 1,
  70       _other_thread = 2
  71   };
  72 
  73   enum SafepointTimeoutReason {
  74     _spinning_timeout = 0,
  75     _blocking_timeout = 1
  76   };
  77 
  78   // The enums are listed in the order of the tasks when done serially.
  79   enum SafepointCleanupTasks {
  80     SAFEPOINT_CLEANUP_DEFLATE_MONITORS,
  81     SAFEPOINT_CLEANUP_UPDATE_INLINE_CACHES,
  82     SAFEPOINT_CLEANUP_COMPILATION_POLICY,
  83     SAFEPOINT_CLEANUP_SYMBOL_TABLE_REHASH,
  84     SAFEPOINT_CLEANUP_STRING_TABLE_REHASH,
  85     SAFEPOINT_CLEANUP_CLD_PURGE,

  86     // Leave this one last.
  87     SAFEPOINT_CLEANUP_NUM_TASKS
  88   };
  89 
  90   typedef struct {
  91     float  _time_stamp;                        // record when the current safepoint occurs in seconds
  92     int    _vmop_type;                         // type of VM operation triggers the safepoint
  93     int    _nof_total_threads;                 // total number of Java threads
  94     int    _nof_initial_running_threads;       // total number of initially seen running threads
  95     int    _nof_threads_wait_to_block;         // total number of threads waiting for to block
  96     bool   _page_armed;                        // true if polling page is armed, false otherwise
  97     int    _nof_threads_hit_page_trap;         // total number of threads hitting the page trap
  98     jlong  _time_to_spin;                      // total time in millis spent in spinning
  99     jlong  _time_to_wait_to_block;             // total time in millis spent in waiting for to block
 100     jlong  _time_to_do_cleanups;               // total time in millis spent in performing cleanups
 101     jlong  _time_to_sync;                      // total time in millis spent in getting to _synchronized
 102     jlong  _time_to_exec_vmop;                 // total time in millis spent in vm operation itself
 103   } SafepointStats;
 104 
 105  private:

  66 
  67   enum SafepointingThread {
  68       _null_thread  = 0,
  69       _vm_thread    = 1,
  70       _other_thread = 2
  71   };
  72 
  73   enum SafepointTimeoutReason {
  74     _spinning_timeout = 0,
  75     _blocking_timeout = 1
  76   };
  77 
  78   // The enums are listed in the order of the tasks when done serially.
  79   enum SafepointCleanupTasks {
  80     SAFEPOINT_CLEANUP_DEFLATE_MONITORS,
  81     SAFEPOINT_CLEANUP_UPDATE_INLINE_CACHES,
  82     SAFEPOINT_CLEANUP_COMPILATION_POLICY,
  83     SAFEPOINT_CLEANUP_SYMBOL_TABLE_REHASH,
  84     SAFEPOINT_CLEANUP_STRING_TABLE_REHASH,
  85     SAFEPOINT_CLEANUP_CLD_PURGE,
  86     SAFEPOINT_CLEANUP_SYSTEM_DICTIONARY_RESIZE,
  87     // Leave this one last.
  88     SAFEPOINT_CLEANUP_NUM_TASKS
  89   };
  90 
  91   typedef struct {
  92     float  _time_stamp;                        // record when the current safepoint occurs in seconds
  93     int    _vmop_type;                         // type of VM operation triggers the safepoint
  94     int    _nof_total_threads;                 // total number of Java threads
  95     int    _nof_initial_running_threads;       // total number of initially seen running threads
  96     int    _nof_threads_wait_to_block;         // total number of threads waiting for to block
  97     bool   _page_armed;                        // true if polling page is armed, false otherwise
  98     int    _nof_threads_hit_page_trap;         // total number of threads hitting the page trap
  99     jlong  _time_to_spin;                      // total time in millis spent in spinning
 100     jlong  _time_to_wait_to_block;             // total time in millis spent in waiting for to block
 101     jlong  _time_to_do_cleanups;               // total time in millis spent in performing cleanups
 102     jlong  _time_to_sync;                      // total time in millis spent in getting to _synchronized
 103     jlong  _time_to_exec_vmop;                 // total time in millis spent in vm operation itself
 104   } SafepointStats;
 105 
 106  private: