src/share/vm/gc/g1/g1CollectedHeap.cpp

*** 5313,5322 ****
--- 5313,5332 ----
  
    double ref_enq_time = os::elapsedTime() - ref_enq_start;
    g1_policy()->phase_times()->record_ref_enq_time(ref_enq_time * 1000.0);
  }
  
+ class TimedTask : public AbstractGangTask {
+  public:
+   TimedTask() : AbstractGangTask("TimedTask") {}
+   void work(uint worker_id) {
+     // Do nothing.
+   }
+ };
+ 
+ #include "utilities/ticks.inline.hpp"
+ 
  void G1CollectedHeap::evacuate_collection_set(EvacuationInfo& evacuation_info) {
    _expand_heap_after_alloc_failure = true;
    _evacuation_failed = false;
  
    // Should G1EvacuationFailureALot be in effect for this GC?
*** 5335,5344 ****
--- 5345,5366 ----
  
    assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty");
    double start_par_time_sec = os::elapsedTime();
    double end_par_time_sec;
  
+   for (int i = 0; i < NewCodeParameter; i++) {
+     TimedTask task;
+     jlong start = os::elapsed_counter();
+     workers()->run_task(&task);
+     jlong end = os::elapsed_counter();
+ 
+     gclog_or_tty->print_cr("TimedTask %f ms (%f - %f)",
+         TimeHelper::counter_to_millis(end - start),
+         TimeHelper::counter_to_millis(start),
+         TimeHelper::counter_to_millis(end));
+   }
+ 
    {
      G1RootProcessor root_processor(this, n_workers);
      G1ParTask g1_par_task(this, _task_queues, &root_processor, n_workers);
      // InitialMark needs claim bits to keep track of the marked-through CLDs.
      if (g1_policy()->during_initial_mark_pause()) {