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 public class TestLoadBytes {
55 @Param("1024")
56 private int size;
57
58 private byte[] srcArray;
59 private ByteBuffer srcBufferNative;
60 private MemorySegment srcSegmentImplicit;
61
62 @Setup
63 public void setup() {
64 srcArray = new byte[size];
65 for (int i = 0; i < srcArray.length; i++) {
66 srcArray[i] = (byte) i;
67 }
68
69 srcBufferNative = ByteBuffer.allocateDirect(size);
70 Arena scope = Arena.ofAuto();
71 srcSegmentImplicit = scope.allocate(size, 1);
72 }
73
74 @Benchmark
75 public int arrayScalar() {
76 int size = 0;
77 for (int i = 0; i < srcArray.length; i ++) {
78 var v = srcArray[i];
79 size += v;
80 }
81 return size;
82 }
83
84 @Benchmark
85 public int arrayScalarConst() {
86 int size = 0;
87 for (int i = 0; i < 1024; i ++) {
88 var v = srcArray[i];
89 size += v;
90 }
91 return size;
92 }
93
94 @Benchmark
95 public int bufferNativeScalar() {
96 int size = 0;
97 for (int i = 0; i < srcArray.length; i++) {
98 var v = srcBufferNative.get(i);
99 size += v;
100 }
101 return size;
102 }
103
104 @Benchmark
105 public int bufferNativeScalarConst() {
106 int size = 0;
107 for (int i = 0; i < 1024; i++) {
108 var v = srcBufferNative.get(i);
109 size += v;
110 }
111 return size;
112 }
113
114 @Benchmark
115 public int segmentNativeScalar() {
116 int size = 0;
117 for (int i = 0; i < srcArray.length; i++) {
118 var v = srcSegmentImplicit.get(JAVA_BYTE, i);
119 size += v;
120 }
121 return size;
122 }
123
124 @Benchmark
125 public int segmentNativeScalarConst() {
126 int size = 0;
127 for (int i = 0; i < 1024; i++) {
128 var v = srcSegmentImplicit.get(JAVA_BYTE, i);
129 size += v;
130 }
131 return size;
132 }
133 }