src/share/vm/gc_implementation/shared/parGCAllocBuffer.hpp

rev 7903 : imported patch 8073013-add-detailed-information-about-plab-memory-usage
rev 7905 : imported patch 8067336-allow-that-plab-allocations-at-the-end-of-regions-are-flexible

*** 33,42 ****
--- 33,44 ----
  // Forward declarations.
  class PLABStats;
  
  // A per-thread allocation buffer used during GC.
  class ParGCAllocBuffer: public CHeapObj<mtGC> {
+ public:
+   static size_t AlignmentReserve;
  protected:
    char      head[32];
    size_t    _word_sz;          // In HeapWord units
    HeapWord* _bottom;
    HeapWord* _top;
*** 44,54 ****
    HeapWord* _hard_end;      // _end + AlignmentReserve
    // In support of ergonomic sizing of PLAB's
    size_t    _allocated;     // in HeapWord units
    size_t    _wasted;        // in HeapWord units
    char      tail[32];
-   static size_t AlignmentReserve;
  
    // Force future allocations to fail and queries for contains()
    // to return false. Returns the amount of unused space in this PLAB.
    size_t invalidate() {
      _end    = _hard_end;
--- 46,55 ----
*** 142,159 ****
    void print() PRODUCT_RETURN;
  };
  
  // PLAB book-keeping.
  class PLABStats VALUE_OBJ_CLASS_SPEC {
    size_t _allocated;      // Total allocated
    size_t _wasted;         // of which wasted (internal fragmentation)
    size_t _unused;         // Unused in last buffer
    size_t _desired_plab_sz;// Output of filter (below), suitably trimmed and quantized
    AdaptiveWeightedAverage
           _filter;         // Integrator with decay
  
!   void reset() {
      _allocated = 0;
      _wasted    = 0;
      _unused    = 0;
    }
   public:
--- 143,161 ----
    void print() PRODUCT_RETURN;
  };
  
  // PLAB book-keeping.
  class PLABStats VALUE_OBJ_CLASS_SPEC {
+  protected:
    size_t _allocated;      // Total allocated
    size_t _wasted;         // of which wasted (internal fragmentation)
    size_t _unused;         // Unused in last buffer
    size_t _desired_plab_sz;// Output of filter (below), suitably trimmed and quantized
    AdaptiveWeightedAverage
           _filter;         // Integrator with decay
  
!   virtual void reset() {
      _allocated = 0;
      _wasted    = 0;
      _unused    = 0;
    }
   public: