--- a/hotspot/src/share/vm/gc/cms/concurrentMarkSweepGeneration.cpp	Thu May 19 11:43:21 2016 +0200
+++ b/hotspot/src/share/vm/gc/cms/concurrentMarkSweepGeneration.cpp	Thu May 19 10:48:28 2016 -0400
@@ -545,6 +545,8 @@
   }
   assert((_conc_workers != NULL) == (ConcGCThreads > 1),
          "Inconsistency");
+  log_debug(gc)("ConcGCThreads: %u", ConcGCThreads);
+  log_debug(gc)("ParallelGCThreads: %u", ParallelGCThreads);
 
   // Parallel task queues; these are shared for the
   // concurrent and stop-world phases of CMS, but