--- old/src/share/vm/services/diagnosticCommand.cpp	2015-05-28 12:12:06.771783379 +0900
+++ new/src/share/vm/services/diagnosticCommand.cpp	2015-05-28 12:12:06.634200999 +0900
@@ -315,7 +315,7 @@
 
 void SystemGCDCmd::execute(DCmdSource source, TRAPS) {
   if (!DisableExplicitGC) {
-    Universe::heap()->collect(GCCause::_java_lang_system_gc);
+    Universe::heap()->collect(GCCause::_dcmd_gc_run);
   } else {
     output()->print_cr("Explicit GC is disabled, no GC has been performed.");
   }