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src/share/vm/runtime/globals.hpp

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@@ -1449,10 +1449,14 @@
           "limiter (a number between 0-100)")                               \
                                                                             \
   product(uintx, ParallelGCThreads, 0,                                      \
           "Number of parallel threads parallel gc will use")                \
                                                                             \
+  diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true,              \
+            "Use semaphore synchronization for the GC Threads, "            \
+            "instead of synchronization based on mutexes")                  \
+                                                                            \
   product(bool, UseDynamicNumberOfGCThreads, false,                         \
           "Dynamically choose the number of parallel threads "              \
           "parallel gc will use")                                           \
                                                                             \
   diagnostic(bool, ForceDynamicNumberOfGCThreads, false,                    \
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