1 /*
  2  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
  3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  4  *
  5  * This code is free software; you can redistribute it and/or modify it
  6  * under the terms of the GNU General Public License version 2 only, as
  7  * published by the Free Software Foundation.
  8  *
  9  * This code is distributed in the hope that it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 12  * version 2 for more details (a copy is included in the LICENSE file that
 13  * accompanied this code).
 14  *
 15  * You should have received a copy of the GNU General Public License version
 16  * 2 along with this work; if not, write to the Free Software Foundation,
 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  */
 23 package org.openjdk.bench.valhalla.acmp.array;
 24 
 25 import org.openjdk.jmh.annotations.Benchmark;
 26 import org.openjdk.jmh.annotations.BenchmarkMode;
 27 import org.openjdk.jmh.annotations.CompilerControl;
 28 import org.openjdk.jmh.annotations.Fork;
 29 import org.openjdk.jmh.annotations.Measurement;
 30 import org.openjdk.jmh.annotations.Mode;
 31 import org.openjdk.jmh.annotations.OperationsPerInvocation;
 32 import org.openjdk.jmh.annotations.OutputTimeUnit;
 33 import org.openjdk.jmh.annotations.Scope;
 34 import org.openjdk.jmh.annotations.State;
 35 import org.openjdk.jmh.annotations.Warmup;
 36 
 37 import java.util.concurrent.TimeUnit;
 38 
 39 /*
 40  *  For proper results it should be executed:
 41  *  java -jar target/benchmarks.jar IdentityIsNotCmpBranch  -wmb IdentityIsNotCmpBranch.Obj_equals050
 42  */
 43 
 44 @Fork(3)
 45 @Warmup(iterations = 3, time = 1)
 46 @Measurement(iterations = 5, time = 1)
 47 @OutputTimeUnit(TimeUnit.NANOSECONDS)
 48 @BenchmarkMode(Mode.AverageTime)
 49 @State(Scope.Thread)
 50 public class IdentityIsNotCmpBranch extends StatesR64long {
 51 
 52     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 53     private static int cmp_Obj(Object[] objects1, Object[] objects2) {
 54         int s = 0;
 55         for (int i = 0; i < SIZE; i++) {
 56             if (objects1[i] != objects2[i]) {
 57                 s += 1;
 58             } else {
 59                 s -= 1;
 60             }
 61         }
 62         return s;
 63     }
 64 
 65     @Benchmark
 66     @OperationsPerInvocation(SIZE)
 67     @CompilerControl(CompilerControl.Mode.INLINE)
 68     public int Obj_equals000(ObjState00 st) {
 69         return cmp_Obj(st.arr1, st.arr2);
 70     }
 71 
 72     @Benchmark
 73     @OperationsPerInvocation(SIZE)
 74     @CompilerControl(CompilerControl.Mode.INLINE)
 75     public int Obj_equals025(ObjState25 st) {
 76         return cmp_Obj(st.arr1, st.arr2);
 77     }
 78 
 79     @Benchmark
 80     @OperationsPerInvocation(SIZE)
 81     @CompilerControl(CompilerControl.Mode.INLINE)
 82     public int Obj_equals050(ObjState50 st) {
 83         return cmp_Obj(st.arr1, st.arr2);
 84     }
 85 
 86     @Benchmark
 87     @OperationsPerInvocation(SIZE)
 88     @CompilerControl(CompilerControl.Mode.INLINE)
 89     public int Obj_equals075(ObjState75 st) {
 90         return cmp_Obj(st.arr1, st.arr2);
 91     }
 92 
 93     @Benchmark
 94     @OperationsPerInvocation(SIZE)
 95     @CompilerControl(CompilerControl.Mode.INLINE)
 96     public int Obj_equals100(ObjState100 st) {
 97         return cmp_Obj(st.arr1, st.arr2);
 98     }
 99 
100 }