--- old/src/share/vm/gc/parallel/psScavenge.cpp	2017-08-03 16:11:10.893643003 -0700
+++ new/src/share/vm/gc/parallel/psScavenge.cpp	2017-08-03 16:11:10.793643007 -0700
@@ -415,9 +415,7 @@
       PSKeepAliveClosure keep_alive(promotion_manager);
       PSEvacuateFollowersClosure evac_followers(promotion_manager);
       ReferenceProcessorStats stats;
-      ReferenceProcessorPhaseTimes pt(&_gc_timer,
-                                      reference_processor()->num_q(),
-                                      reference_processor()->processing_is_mt());
+      ReferenceProcessorPhaseTimes pt(&_gc_timer, reference_processor()->num_q());
       if (reference_processor()->processing_is_mt()) {
         PSRefProcTaskExecutor task_executor;
         stats = reference_processor()->process_discovered_references(