diff -r 52672a450193 -r 76df293e57aa src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp
--- a/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp	Fri Apr 29 12:46:05 2016 -0400
+++ b/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp	Tue May 03 13:57:12 2016 -0400
@@ -3233,6 +3233,13 @@
     if (new_block != cur_block) {
       cur_block = new_block;
       sd.block(cur_block)->set_offset(bitmap->bits_to_words(live_bits));
+
+#ifdef MIPS64
+      /* 2016/5/4 Jin: On 3A2000-B, when multiple threads write to
+         the same memory location without explict synchronization,
+         sync is required for access correctness. */
+      OrderAccess::fence();
+#endif
     }
 
     const size_t end_bit = bitmap->find_obj_end(beg_bit, range_end);