1 /*
  2  * Copyright (c) 2025, 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.array.walk;
 24 
 25 import jdk.internal.value.ValueClass;
 26 import jdk.internal.vm.annotation.LooselyConsistentValue;
 27 import org.openjdk.jmh.annotations.Benchmark;
 28 import org.openjdk.jmh.annotations.CompilerControl;
 29 import org.openjdk.jmh.annotations.Fork;
 30 import org.openjdk.jmh.annotations.Setup;
 31 
 32 @Fork(value = 3, jvmArgsAppend = {"--enable-preview", "--add-exports", "java.base/jdk.internal.value=ALL-UNNAMED"})
 33 public class Value128NullFreeNonAtomic extends WalkBase {
 34 
 35     public interface InterfaceInt {
 36         public int value();
 37     }
 38 
 39     @LooselyConsistentValue
 40     public static value class ValueInt4 implements InterfaceInt {
 41 
 42         public final int prevalue0;
 43         public final int prevalue1;
 44         public final int prevalue2;
 45         public final int value;
 46 
 47         public ValueInt4(int value) {
 48             this.prevalue0 = value;
 49             this.prevalue1 = value;
 50             this.prevalue2 = value;
 51             this.value = value;
 52         }
 53 
 54         public int value() {
 55             return value;
 56         }
 57 
 58     }
 59 
 60     public static class ValState extends SizeState {
 61         public ValueInt4[] arr;
 62 
 63         @Setup
 64         public void setup() {
 65             arr = (ValueInt4[]) ValueClass.newNullRestrictedNonAtomicArray(ValueInt4.class, size, new ValueInt4(0));
 66             int[] a = makeRandomRing(arr.length);
 67             for (int i = 0; i < a.length; i++) {
 68                 arr[i] = new ValueInt4(a[i]);
 69             }
 70         }
 71     }
 72 
 73     public static class IntState extends SizeState {
 74         public InterfaceInt[] arr;
 75 
 76         @Setup
 77         public void setup() {
 78             arr = new InterfaceInt[size];
 79             int[] a = makeRandomRing(arr.length);
 80             for (int i = 0; i < a.length; i++) {
 81                 arr[i] = new ValueInt4(a[i]);
 82             }
 83         }
 84     }
 85 
 86     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 87     private static int walk_val(ValueInt4[] values) {
 88         int steps = 0;
 89         for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
 90         return steps;
 91     }
 92 
 93     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 94     private static int walk_int(InterfaceInt[] values) {
 95         int steps = 0;
 96         for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
 97         return steps;
 98     }
 99 
100     @Benchmark
101     public int walk_val_as_val(ValState st) {
102         return walk_val(st.arr);
103     }
104 
105     @Benchmark
106     public int walk_int_as_int(IntState st) {
107         return walk_int(st.arr);
108     }
109 
110 }