1.1 --- a/src/share/vm/memory/threadLocalAllocBuffer.hpp Wed Apr 07 10:35:56 2010 -0700
1.2 +++ b/src/share/vm/memory/threadLocalAllocBuffer.hpp Wed Apr 07 12:39:27 2010 -0700
1.3 @@ -111,7 +111,22 @@
1.4
1.5 // Allocate size HeapWords. The memory is NOT initialized to zero.
1.6 inline HeapWord* allocate(size_t size);
1.7 - static size_t alignment_reserve() { return align_object_size(typeArrayOopDesc::header_size(T_INT)); }
1.8 +
1.9 + // Reserve space at the end of TLAB
1.10 + static size_t end_reserve() {
1.11 + int reserve_size = typeArrayOopDesc::header_size(T_INT);
1.12 + if (AllocatePrefetchStyle == 3) {
1.13 + // BIS is used to prefetch - we need a space for it.
1.14 + // +1 for rounding up to next cache line +1 to be safe
1.15 + int lines = AllocatePrefetchLines + 2;
1.16 + int step_size = AllocatePrefetchStepSize;
1.17 + int distance = AllocatePrefetchDistance;
1.18 + int prefetch_end = (distance + step_size*lines)/(int)HeapWordSize;
1.19 + reserve_size = MAX2(reserve_size, prefetch_end);
1.20 + }
1.21 + return reserve_size;
1.22 + }
1.23 + static size_t alignment_reserve() { return align_object_size(end_reserve()); }
1.24 static size_t alignment_reserve_in_bytes() { return alignment_reserve() * HeapWordSize; }
1.25
1.26 // Return tlab size or remaining space in eden such that the
