--- old/src/hotspot/share/runtime/globals.hpp	2018-02-03 14:27:20.891193931 +0900
+++ new/src/hotspot/share/runtime/globals.hpp	2018-02-03 14:27:20.595192992 +0900
@@ -3867,6 +3867,9 @@
           "0=off, 1=conservative, 2=aggressive")                            \
           range(0, 2)                                                       \
                                                                             \
+  product(bool, EnableConcGCPerfCounter, false,                             \
+          "Enable PerfCounter for STW in CMS GC")                           \
+                                                                            \
   /* Serviceability Support */                                              \
                                                                             \
   product(bool, ManagementServer, false,                                    \