src/hotspot/share/runtime/sweeper.cpp

*** 162,173 ****
  Tickspan NMethodSweeper::_total_time_sweeping;                 // Accumulated time sweeping
  Tickspan NMethodSweeper::_total_time_this_sweep;               // Total time this sweep
  Tickspan NMethodSweeper::_peak_sweep_time;                     // Peak time for a full sweep
  Tickspan NMethodSweeper::_peak_sweep_fraction_time;            // Peak time sweeping one fraction
  
- Monitor* NMethodSweeper::_stat_lock = new Monitor(Mutex::special, "Sweeper::Statistics", true, Monitor::_safepoint_check_sometimes);
- 
  class MarkActivationClosure: public CodeBlobClosure {
  public:
    virtual void do_code_blob(CodeBlob* cb) {
      assert(cb->is_nmethod(), "CodeBlob should be nmethod");
      nmethod* nm = (nmethod*)cb;
--- 162,171 ----
*** 576,586 ****
    assert(_current.end(), "must have scanned the whole cache");
  
    const Ticks sweep_end_counter = Ticks::now();
    const Tickspan sweep_time = sweep_end_counter - sweep_start_counter;
    {
!     MutexLockerEx mu(_stat_lock, Mutex::_no_safepoint_check_flag);
      _total_time_sweeping  += sweep_time;
      _total_time_this_sweep += sweep_time;
      _peak_sweep_fraction_time = MAX2(sweep_time, _peak_sweep_fraction_time);
      _total_flushed_size += freed_memory;
      _total_nof_methods_reclaimed += flushed_count;
--- 574,584 ----
    assert(_current.end(), "must have scanned the whole cache");
  
    const Ticks sweep_end_counter = Ticks::now();
    const Tickspan sweep_time = sweep_end_counter - sweep_start_counter;
    {
!     MutexLockerEx mu(NMethodSweeper_stat_lock, Mutex::_no_safepoint_check_flag);
      _total_time_sweeping  += sweep_time;
      _total_time_this_sweep += sweep_time;
      _peak_sweep_fraction_time = MAX2(sweep_time, _peak_sweep_fraction_time);
      _total_flushed_size += freed_memory;
      _total_nof_methods_reclaimed += flushed_count;