test/micro/org/openjdk/bench/vm/lang/LockUnlock.java

rev 53235 : 8216350: AArch64: monitor unlock fast path not called
Reviewed-by: aph, drwhite, fyang

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2019, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -28,10 +28,11 @@
 import org.openjdk.jmh.annotations.OutputTimeUnit;
 import org.openjdk.jmh.annotations.Param;
 import org.openjdk.jmh.annotations.Scope;
 import org.openjdk.jmh.annotations.Setup;
 import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Threads;
 
 import java.util.concurrent.TimeUnit;
 
 
 /**

@@ -114,6 +115,18 @@
             return 1;
         } else {
             return fact(n - 1) * n;
         }
     }
+
+    /**
+     * With two threads lockObject1 will be contended so should be
+     * inflated.
+     */
+    @Threads(2)
+    @Benchmark
+    public void testContendedLock() {
+        synchronized (lockObject1) {
+            dummyInt1++;
+        }
+    }
 }