src/share/vm/gc_implementation/g1/heapRegion.hpp

rev 5921 : 8027295: Free CSet takes ~50% of young pause time
Summary: Improve fast card cache iteration and avoid taking locks when freeing the collection set.
Reviewed-by:

*** 594,604 ****
  
    // Allows logical separation between objects allocated before and after.
    void save_marks();
  
    // Reset HR stuff to default values.
!   void hr_clear(bool par, bool clear_space);
    void par_clear();
  
    // Get the start of the unmarked area in this region.
    HeapWord* prev_top_at_mark_start() const { return _prev_top_at_mark_start; }
    HeapWord* next_top_at_mark_start() const { return _next_top_at_mark_start; }
--- 594,604 ----
  
    // Allows logical separation between objects allocated before and after.
    void save_marks();
  
    // Reset HR stuff to default values.
!   void hr_clear(bool par, bool clear_space, bool locked = false);
    void par_clear();
  
    // Get the start of the unmarked area in this region.
    HeapWord* prev_top_at_mark_start() const { return _prev_top_at_mark_start; }
    HeapWord* next_top_at_mark_start() const { return _next_top_at_mark_start; }