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 IdentityIsCmpResult  -wmb IdentityIsCmpResult.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 IdentityIsCmpResult extends StatesR64long {
51 
52     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
53     private static boolean cmp_Obj(Object[] objects1, Object[] objects2) {
54         boolean s = false;
55         for (int i = 0; i < SIZE; i++) {
56             s ^= objects1[i] == objects2[i];
57         }
58         return s;
59     }
60 
61     @Benchmark
62     @OperationsPerInvocation(SIZE)
63     @CompilerControl(CompilerControl.Mode.INLINE)
64     public boolean Obj_equals000(ObjState00 st) {
65         return cmp_Obj(st.arr1, st.arr2);
66     }
67 
68     @Benchmark
69     @OperationsPerInvocation(SIZE)
70     @CompilerControl(CompilerControl.Mode.INLINE)
71     public boolean Obj_equals025(ObjState25 st) {
72         return cmp_Obj(st.arr1, st.arr2);
73     }
74 
75     @Benchmark
76     @OperationsPerInvocation(SIZE)
77     @CompilerControl(CompilerControl.Mode.INLINE)
78     public boolean Obj_equals050(ObjState50 st) {
79         return cmp_Obj(st.arr1, st.arr2);
80     }
81 
82     @Benchmark
83     @OperationsPerInvocation(SIZE)
84     @CompilerControl(CompilerControl.Mode.INLINE)
85     public boolean Obj_equals075(ObjState75 st) {
86         return cmp_Obj(st.arr1, st.arr2);
87     }
88 
89     @Benchmark
90     @OperationsPerInvocation(SIZE)
91     @CompilerControl(CompilerControl.Mode.INLINE)
92     public boolean Obj_equals100(ObjState100 st) {
93         return cmp_Obj(st.arr1, st.arr2);
94     }
95 
96 }