# HG changeset patch
# User coleenp
# Date 1519240106 18000
# Node ID ebdbf7f901993030eaa7cc0eac5a5d1527a95db7
# Parent  dc68aeea4840db0d1adae30d58645cedf0af63b4
8068593: Remove or repurpose unused PerfCounters from objectMonitor
Reviewed-by: redestad, dcubed

diff -r dc68aeea4840 -r ebdbf7f90199 src/hotspot/share/runtime/objectMonitor.cpp
--- a/src/hotspot/share/runtime/objectMonitor.cpp	Wed Feb 21 11:18:52 2018 -0500
+++ b/src/hotspot/share/runtime/objectMonitor.cpp	Wed Feb 21 14:08:26 2018 -0500
@@ -102,8 +102,6 @@
 int ObjectMonitor::Knob_VerifyInUse = 0;
 int ObjectMonitor::Knob_VerifyMatch = 0;
 int ObjectMonitor::Knob_SpinLimit   = 5000;    // derived by an external tool -
-static int Knob_LogSpins            = 0;       // enable jvmstat tally for spins
-static int Knob_HandOff             = 0;
 static int Knob_ReportSettings      = 0;
 
 static int Knob_SpinBase            = 0;       // Floor AKA SpinMin
@@ -2229,18 +2227,7 @@
 PerfCounter * ObjectMonitor::_sync_ContendedLockAttempts       = NULL;
 PerfCounter * ObjectMonitor::_sync_FutileWakeups               = NULL;
 PerfCounter * ObjectMonitor::_sync_Parks                       = NULL;
-PerfCounter * ObjectMonitor::_sync_EmptyNotifications          = NULL;
 PerfCounter * ObjectMonitor::_sync_Notifications               = NULL;
-PerfCounter * ObjectMonitor::_sync_PrivateA                    = NULL;
-PerfCounter * ObjectMonitor::_sync_PrivateB                    = NULL;
-PerfCounter * ObjectMonitor::_sync_SlowExit                    = NULL;
-PerfCounter * ObjectMonitor::_sync_SlowEnter                   = NULL;
-PerfCounter * ObjectMonitor::_sync_SlowNotify                  = NULL;
-PerfCounter * ObjectMonitor::_sync_SlowNotifyAll               = NULL;
-PerfCounter * ObjectMonitor::_sync_FailedSpins                 = NULL;
-PerfCounter * ObjectMonitor::_sync_SuccessfulSpins             = NULL;
-PerfCounter * ObjectMonitor::_sync_MonInCirculation            = NULL;
-PerfCounter * ObjectMonitor::_sync_MonScavenged                = NULL;
 PerfCounter * ObjectMonitor::_sync_Inflations                  = NULL;
 PerfCounter * ObjectMonitor::_sync_Deflations                  = NULL;
 PerfLongVariable * ObjectMonitor::_sync_MonExtant              = NULL;
@@ -2271,18 +2258,7 @@
     NEWPERFCOUNTER(_sync_ContendedLockAttempts);
     NEWPERFCOUNTER(_sync_FutileWakeups);
     NEWPERFCOUNTER(_sync_Parks);
-    NEWPERFCOUNTER(_sync_EmptyNotifications);
     NEWPERFCOUNTER(_sync_Notifications);
-    NEWPERFCOUNTER(_sync_SlowEnter);
-    NEWPERFCOUNTER(_sync_SlowExit);
-    NEWPERFCOUNTER(_sync_SlowNotify);
-    NEWPERFCOUNTER(_sync_SlowNotifyAll);
-    NEWPERFCOUNTER(_sync_FailedSpins);
-    NEWPERFCOUNTER(_sync_SuccessfulSpins);
-    NEWPERFCOUNTER(_sync_PrivateA);
-    NEWPERFCOUNTER(_sync_PrivateB);
-    NEWPERFCOUNTER(_sync_MonInCirculation);
-    NEWPERFCOUNTER(_sync_MonScavenged);
     NEWPERFVARIABLE(_sync_MonExtant);
 #undef NEWPERFCOUNTER
 #undef NEWPERFVARIABLE
@@ -2351,7 +2327,6 @@
   SETKNOB(SpinBackOff);
   SETKNOB(CASPenalty);
   SETKNOB(OXPenalty);
-  SETKNOB(LogSpins);
   SETKNOB(SpinSetSucc);
   SETKNOB(SuccEnabled);
   SETKNOB(SuccRestrict);
@@ -2389,10 +2364,6 @@
     Knob_FixedSpin = -1;
   }
 
-  if (Knob_LogSpins == 0) {
-    ObjectMonitor::_sync_FailedSpins = NULL;
-  }
-
   os::free(knobs);
   OrderAccess::fence();
   InitDone = 1;
diff -r dc68aeea4840 -r ebdbf7f90199 src/hotspot/share/runtime/objectMonitor.hpp
--- a/src/hotspot/share/runtime/objectMonitor.hpp	Wed Feb 21 11:18:52 2018 -0500
+++ b/src/hotspot/share/runtime/objectMonitor.hpp	Wed Feb 21 14:08:26 2018 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -191,18 +191,7 @@
   static PerfCounter * _sync_ContendedLockAttempts;
   static PerfCounter * _sync_FutileWakeups;
   static PerfCounter * _sync_Parks;
-  static PerfCounter * _sync_EmptyNotifications;
   static PerfCounter * _sync_Notifications;
-  static PerfCounter * _sync_SlowEnter;
-  static PerfCounter * _sync_SlowExit;
-  static PerfCounter * _sync_SlowNotify;
-  static PerfCounter * _sync_SlowNotifyAll;
-  static PerfCounter * _sync_FailedSpins;
-  static PerfCounter * _sync_SuccessfulSpins;
-  static PerfCounter * _sync_PrivateA;
-  static PerfCounter * _sync_PrivateB;
-  static PerfCounter * _sync_MonInCirculation;
-  static PerfCounter * _sync_MonScavenged;
   static PerfCounter * _sync_Inflations;
   static PerfCounter * _sync_Deflations;
   static PerfLongVariable * _sync_MonExtant;