--- old/src/share/vm/gc/parallel/psScavenge.cpp	2017-09-01 13:03:02.002300149 +0200
+++ new/src/share/vm/gc/parallel/psScavenge.cpp	2017-09-01 13:03:01.866294744 +0200
@@ -307,7 +307,7 @@
     TraceCollectorStats tcs(counters());
     TraceMemoryManagerStats tms(false /* not full GC */,gc_cause);
 
-    if (TraceYoungGenTime) accumulated_time()->start();
+    if (log_is_enabled(Debug, gc, heap, exit)) accumulated_time()->start();
 
     // Let the size policy know we're starting
     size_policy->minor_collection_begin();
@@ -609,7 +609,7 @@
       CardTableExtension::verify_all_young_refs_imprecise();
     }
 
-    if (TraceYoungGenTime) accumulated_time()->stop();
+    if (log_is_enabled(Debug, gc, heap, exit)) accumulated_time()->stop();
 
     young_gen->print_used_change(pre_gc_values.young_gen_used());
     old_gen->print_used_change(pre_gc_values.old_gen_used());