--- old/src/hotspot/share/runtime/globals.hpp	2017-09-27 00:03:27.533296892 +0900
+++ new/src/hotspot/share/runtime/globals.hpp	2017-09-27 00:03:27.333296631 +0900
@@ -3866,6 +3866,9 @@
           "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,                                    \