--- old/src/share/vm/gc/shared/referenceProcessor.cpp	2016-03-16 08:24:44.830807437 -0700
+++ new/src/share/vm/gc/shared/referenceProcessor.cpp	2016-03-16 08:24:44.730807433 -0700
@@ -696,6 +696,11 @@
 }
 #endif
 
+void ReferenceProcessor::set_active_mt_degree(uint v) {
+  _num_q = v;
+  _next_id = 0;
+}
+
 // Balances reference queues.
 // Move entries from all queues[0, 1, ..., _max_num_q-1] to
 // queues[0, 1, ..., _num_q-1] because only the first _num_q