--- old/src/share/vm/gc/g1/g1ConcurrentMark.hpp	2016-11-22 11:22:17.066094238 +0100
+++ new/src/share/vm/gc/g1/g1ConcurrentMark.hpp	2016-11-22 11:22:16.976091514 +0100
@@ -26,6 +26,7 @@
 #define SHARE_VM_GC_G1_G1CONCURRENTMARK_HPP
 
 #include "classfile/javaClasses.hpp"
+#include "gc/g1/g1ConcurrentMarkObjArrayProcessor.hpp"
 #include "gc/g1/g1RegionToSpaceMapper.hpp"
 #include "gc/g1/heapRegionSet.hpp"
 #include "gc/shared/taskqueue.hpp"
@@ -706,11 +707,13 @@
     words_scanned_period          = 12*1024,
     // The regular clock call is called once the number of visited
     // references reaches this limit
-    refs_reached_period           = 384,
+    refs_reached_period           = 1024,
     // Initial value for the hash seed, used in the work stealing code
     init_hash_seed                = 17
   };
 
+  G1CMObjArrayProcessor       _objArray_processor;
+
   uint                        _worker_id;
   G1CollectedHeap*            _g1h;
   G1ConcurrentMark*           _cm;
@@ -827,7 +830,11 @@
 
   template<bool scan> void process_grey_object(oop obj);
 
+  void process_object(oop obj);
 public:
+  // Apply the closure on the given area of the objArray. Return the number of words
+  // scanned.
+  inline size_t scan_objArray(objArrayOop const obj, MemRegion mr);
   // It resets the task; it should be called right at the beginning of
   // a marking phase.
   void reset(G1CMBitMap* _nextMarkBitMap);