src/hotspot/share/gc/shenandoah/shenandoahHeuristics.hpp

rev 58150 : 8239904: Shenandoah: accumulated penalties should not be over 100% of capacity
Reviewed-by: XXX

*** 65,75 ****
  
  class ShenandoahCollectionSet;
  class ShenandoahHeapRegion;
  
  class ShenandoahHeuristics : public CHeapObj<mtGC> {
!   static const intx Concurrent_Adjust   =  1; // recover from penalties
    static const intx Degenerated_Penalty = 10; // how much to penalize average GC duration history on Degenerated GC
    static const intx Full_Penalty        = 20; // how much to penalize average GC duration history on Full GC
  
  protected:
    typedef struct {
--- 65,75 ----
  
  class ShenandoahCollectionSet;
  class ShenandoahHeapRegion;
  
  class ShenandoahHeuristics : public CHeapObj<mtGC> {
!   static const intx Concurrent_Adjust   = -1; // recover from penalties
    static const intx Degenerated_Penalty = 10; // how much to penalize average GC duration history on Degenerated GC
    static const intx Full_Penalty        = 20; // how much to penalize average GC duration history on Full GC
  
  protected:
    typedef struct {
*** 91,101 ****
  
    double _cycle_start;
    double _last_cycle_end;
  
    size_t _gc_times_learned;
!   size_t _gc_time_penalties;
    TruncatedSeq* _gc_time_history;
  
    // There may be many threads that contend to set this flag
    ShenandoahSharedFlag _metaspace_oom;
  
--- 91,101 ----
  
    double _cycle_start;
    double _last_cycle_end;
  
    size_t _gc_times_learned;
!   intx _gc_time_penalties;
    TruncatedSeq* _gc_time_history;
  
    // There may be many threads that contend to set this flag
    ShenandoahSharedFlag _metaspace_oom;
  
*** 108,117 ****
--- 108,119 ----
  
    virtual void choose_collection_set_from_regiondata(ShenandoahCollectionSet* set,
                                                       RegionData* data, size_t data_size,
                                                       size_t free) = 0;
  
+   void adjust_penalty(intx step);
+ 
  public:
    ShenandoahHeuristics();
    virtual ~ShenandoahHeuristics();
  
    void record_gc_start();