*** old/src/share/vm/gc/shared/threadLocalAllocBuffer.hpp	Thu Apr 28 11:48:50 2016
--- new/src/share/vm/gc/shared/threadLocalAllocBuffer.hpp	Thu Apr 28 11:48:50 2016

*** 48,57 ****
--- 48,58 ----
    size_t    _desired_size;                       // desired size   (including alignment_reserve)
    size_t    _refill_waste_limit;                 // hold onto tlab if free() is larger than this
    size_t    _allocated_before_last_gc;           // total bytes allocated up until the last gc
  
    static size_t   _max_size;                          // maximum size of any TLAB
+   static int      _reserve_for_allocation_prefetch;   // Reserve at the end of the TLAB
    static unsigned _target_refills;                    // expected number of refills between GCs
  
    unsigned  _number_of_refills;
    unsigned  _fast_refill_waste;
    unsigned  _slow_refill_waste;

*** 127,137 ****
--- 128,138 ----
    inline HeapWord* allocate(size_t size);
  
    // Reserve space at the end of TLAB
    static size_t end_reserve() {
      int reserve_size = typeArrayOopDesc::header_size(T_INT);
!     return MAX2(reserve_size, VM_Version::reserve_for_allocation_prefetch());
!     return MAX2(reserve_size, _reserve_for_allocation_prefetch);
    }
    static size_t alignment_reserve()              { return align_object_size(end_reserve()); }
    static size_t alignment_reserve_in_bytes()     { return alignment_reserve() * HeapWordSize; }
  
    // Return tlab size or remaining space in eden such that the