--- old/src/share/vm/gc/serial/genMarkSweep.cpp	2017-08-03 16:11:12.189642958 -0700
+++ new/src/share/vm/gc/serial/genMarkSweep.cpp	2017-08-03 16:11:12.089642961 -0700
@@ -210,7 +210,7 @@
     GCTraceTime(Debug, gc, phases) tm_m("Reference Processing", gc_timer());
 
     ref_processor()->setup_policy(clear_all_softrefs);
-    ReferenceProcessorPhaseTimes pt(_gc_timer, ref_processor()->num_q(), ref_processor()->processing_is_mt());
+    ReferenceProcessorPhaseTimes pt(_gc_timer, ref_processor()->num_q());
     const ReferenceProcessorStats& stats =
       ref_processor()->process_discovered_references(
         &is_alive, &keep_alive, &follow_stack_closure, NULL, &pt);