src/share/vm/gc/shared/plab.cpp

*** 43,54 ****
    _end(NULL), _hard_end(NULL), _allocated(0), _wasted(0), _undo_wasted(0)
  {
    // ArrayOopDesc::header_size depends on command line initialization.
    AlignmentReserve = oopDesc::header_size() > MinObjAlignment ? align_object_size(arrayOopDesc::header_size(T_INT)) : 0;
    assert(min_size() > AlignmentReserve,
!          err_msg("Minimum PLAB size " SIZE_FORMAT " must be larger than alignment reserve " SIZE_FORMAT " "
!                  "to be able to contain objects", min_size(), AlignmentReserve));
  }
  
  // If the minimum object size is greater than MinObjAlignment, we can
  // end up with a shard at the end of the buffer that's smaller than
  // the smallest object.  We can't allow that because the buffer must
--- 43,54 ----
    _end(NULL), _hard_end(NULL), _allocated(0), _wasted(0), _undo_wasted(0)
  {
    // ArrayOopDesc::header_size depends on command line initialization.
    AlignmentReserve = oopDesc::header_size() > MinObjAlignment ? align_object_size(arrayOopDesc::header_size(T_INT)) : 0;
    assert(min_size() > AlignmentReserve,
!          "Minimum PLAB size " SIZE_FORMAT " must be larger than alignment reserve " SIZE_FORMAT " "
!          "to be able to contain objects", min_size(), AlignmentReserve);
  }
  
  // If the minimum object size is greater than MinObjAlignment, we can
  // end up with a shard at the end of the buffer that's smaller than
  // the smallest object.  We can't allow that because the buffer must
*** 123,138 ****
    assert(is_object_aligned(max_size()) && min_size() <= max_size(),
           "PLAB clipping computation may be incorrect");
  
    if (_allocated == 0) {
      assert(_unused == 0,
!            err_msg("Inconsistency in PLAB stats: "
                     "_allocated: " SIZE_FORMAT ", "
                     "_wasted: " SIZE_FORMAT ", "
                     "_unused: " SIZE_FORMAT ", "
                     "_undo_wasted: " SIZE_FORMAT,
!                    _allocated, _wasted, _unused, _undo_wasted));
  
      _allocated = 1;
    }
    double wasted_frac    = (double)_unused / (double)_allocated;
    size_t target_refills = (size_t)((wasted_frac * TargetSurvivorRatio) / TargetPLABWastePct);
--- 123,138 ----
    assert(is_object_aligned(max_size()) && min_size() <= max_size(),
           "PLAB clipping computation may be incorrect");
  
    if (_allocated == 0) {
      assert(_unused == 0,
!            "Inconsistency in PLAB stats: "
             "_allocated: " SIZE_FORMAT ", "
             "_wasted: " SIZE_FORMAT ", "
             "_unused: " SIZE_FORMAT ", "
             "_undo_wasted: " SIZE_FORMAT,
!            _allocated, _wasted, _unused, _undo_wasted);
  
      _allocated = 1;
    }
    double wasted_frac    = (double)_unused / (double)_allocated;
    size_t target_refills = (size_t)((wasted_frac * TargetSurvivorRatio) / TargetPLABWastePct);