1 /*
2 * Copyright (c) 2021, 2022, 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
24 package org.openjdk.bench.java.lang.foreign;
25
26 import java.lang.foreign.MemorySegment;
27
28 import org.openjdk.jmh.annotations.Benchmark;
29 import org.openjdk.jmh.annotations.BenchmarkMode;
30 import org.openjdk.jmh.annotations.CompilerControl;
31 import org.openjdk.jmh.annotations.Fork;
32 import org.openjdk.jmh.annotations.Measurement;
33 import org.openjdk.jmh.annotations.Mode;
34 import org.openjdk.jmh.annotations.OutputTimeUnit;
35 import org.openjdk.jmh.annotations.Param;
36 import org.openjdk.jmh.annotations.Setup;
37 import org.openjdk.jmh.annotations.State;
38 import org.openjdk.jmh.annotations.Warmup;
39
40 import java.lang.foreign.Arena;
41 import java.nio.ByteBuffer;
42 import java.util.concurrent.TimeUnit;
43
44 import static java.lang.foreign.ValueLayout.JAVA_BYTE;
45
46 @BenchmarkMode(Mode.AverageTime)
47 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
48 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
49 @State(org.openjdk.jmh.annotations.Scope.Thread)
50 @OutputTimeUnit(TimeUnit.NANOSECONDS)
51 @Fork(value = 1, jvmArgsAppend = {
52 "-Dforeign.restricted=permit",
53 "--enable-native-access", "ALL-UNNAMED",
54 "--enable-preview"})
55 public class TestLoadBytes {
56 @Param("1024")
57 private int size;
58
59 private byte[] srcArray;
60 private ByteBuffer srcBufferNative;
61 private MemorySegment srcSegmentImplicit;
62
63 @Setup
64 public void setup() {
65 srcArray = new byte[size];
66 for (int i = 0; i < srcArray.length; i++) {
67 srcArray[i] = (byte) i;
68 }
69
70 srcBufferNative = ByteBuffer.allocateDirect(size);
71 Arena scope = Arena.ofAuto();
72 srcSegmentImplicit = scope.allocate(size, 1);
73 }
74
75 @Benchmark
76 public int arrayScalar() {
77 int size = 0;
78 for (int i = 0; i < srcArray.length; i ++) {
79 var v = srcArray[i];
80 size += v;
81 }
82 return size;
83 }
84
85 @Benchmark
86 public int arrayScalarConst() {
87 int size = 0;
88 for (int i = 0; i < 1024; i ++) {
89 var v = srcArray[i];
90 size += v;
91 }
92 return size;
93 }
94
95 @Benchmark
96 public int bufferNativeScalar() {
97 int size = 0;
98 for (int i = 0; i < srcArray.length; i++) {
99 var v = srcBufferNative.get(i);
100 size += v;
101 }
102 return size;
103 }
104
105 @Benchmark
106 public int bufferNativeScalarConst() {
107 int size = 0;
108 for (int i = 0; i < 1024; i++) {
109 var v = srcBufferNative.get(i);
110 size += v;
111 }
112 return size;
113 }
114
115 @Benchmark
116 public int segmentNativeScalar() {
117 int size = 0;
118 for (int i = 0; i < srcArray.length; i++) {
119 var v = srcSegmentImplicit.get(JAVA_BYTE, i);
120 size += v;
121 }
122 return size;
123 }
124
125 @Benchmark
126 public int segmentNativeScalarConst() {
127 int size = 0;
128 for (int i = 0; i < 1024; i++) {
129 var v = srcSegmentImplicit.get(JAVA_BYTE, i);
130 size += v;
131 }
132 return size;
133 }
134 }