1 /*
2 * Copyright (c) 2020, 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 package org.openjdk.bench.java.lang.foreign;
24
25 import java.lang.foreign.Arena;
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.Fork;
31 import org.openjdk.jmh.annotations.Measurement;
32 import org.openjdk.jmh.annotations.Mode;
33 import org.openjdk.jmh.annotations.OutputTimeUnit;
34 import org.openjdk.jmh.annotations.Setup;
35 import org.openjdk.jmh.annotations.State;
36 import org.openjdk.jmh.annotations.TearDown;
37 import org.openjdk.jmh.annotations.Warmup;
38 import sun.misc.Unsafe;
39
40 import java.nio.ByteBuffer;
41 import java.nio.ByteOrder;
42 import java.util.concurrent.TimeUnit;
43
44 import static java.lang.foreign.ValueLayout.*;
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.MILLISECONDS)
51 @Fork(value = 3, jvmArgsAppend = { "--enable-native-access=ALL-UNNAMED" })
52 public class LoopOverNonConstant extends JavaLayouts {
53
54 static final Unsafe unsafe = Utils.unsafe;
55
56 static final int ELEM_SIZE = 1_000_000;
57 static final int CARRIER_SIZE = (int)JAVA_INT.byteSize();
58 static final int ALLOC_SIZE = ELEM_SIZE * CARRIER_SIZE;
59
60 Arena arena;
61 MemorySegment segment;
62 long unsafe_addr;
63
64 ByteBuffer byteBuffer;
65
66 @Setup
67 public void setup() {
68 unsafe_addr = unsafe.allocateMemory(ALLOC_SIZE);
69 for (int i = 0; i < ELEM_SIZE; i++) {
70 unsafe.putInt(unsafe_addr + (i * CARRIER_SIZE) , i);
71 }
72 arena = Arena.ofConfined();
73 segment = arena.allocate(ALLOC_SIZE, 1);
74 for (int i = 0; i < ELEM_SIZE; i++) {
75 VH_INT.set(segment, (long) i, i);
76 }
77 byteBuffer = ByteBuffer.allocateDirect(ALLOC_SIZE).order(ByteOrder.nativeOrder());
78 for (int i = 0; i < ELEM_SIZE; i++) {
79 byteBuffer.putInt(i * CARRIER_SIZE , i);
80 }
81 }
82
83 @TearDown
84 public void tearDown() {
85 arena.close();
86 unsafe.invokeCleaner(byteBuffer);
87 unsafe.freeMemory(unsafe_addr);
88 }
89
90 @Benchmark
91 @OutputTimeUnit(TimeUnit.NANOSECONDS)
92 public int unsafe_get() {
93 return unsafe.getInt(unsafe_addr);
94 }
95
96 @Benchmark
97 @OutputTimeUnit(TimeUnit.NANOSECONDS)
98 public int segment_get() {
99 return (int) VH_INT.get(segment, 0L);
100 }
101
102 @Benchmark
103 @OutputTimeUnit(TimeUnit.NANOSECONDS)
104 public int BB_get() {
105 return byteBuffer.getInt(0);
106 }
107
108 @Benchmark
109 public int unsafe_loop() {
110 int res = 0;
111 for (int i = 0; i < ELEM_SIZE; i ++) {
112 res += unsafe.getInt(unsafe_addr + (i * CARRIER_SIZE));
113 }
114 return res;
115 }
116
117 @Benchmark
118 public int segment_loop() {
119 int sum = 0;
120 for (int i = 0; i < ELEM_SIZE; i++) {
121 sum += (int) VH_INT.get(segment, (long) i);
122 }
123 return sum;
124 }
125
126 @Benchmark
127 public int segment_loop_unaligned() {
128 int sum = 0;
129 for (int i = 0; i < ELEM_SIZE; i++) {
130 sum += (int) VH_INT_UNALIGNED.get(segment, (long) i);
131 }
132 return sum;
133 }
134
135 @Benchmark
136 public int segment_loop_instance() {
137 int sum = 0;
138 for (int i = 0; i < ELEM_SIZE; i++) {
139 sum += segment.get(JAVA_INT, i * CARRIER_SIZE);
140
141 }
142 return sum;
143 }
144
145 @Benchmark
146 public int segment_loop_instance_index() {
147 int sum = 0;
148 for (int i = 0; i < ELEM_SIZE; i++) {
149 sum += segment.getAtIndex(JAVA_INT, i);
150
151 }
152 return sum;
153 }
154
155 @Benchmark
156 public int segment_loop_instance_unaligned() {
157 int res = 0;
158 for (int i = 0; i < ELEM_SIZE; i ++) {
159 res += segment.get(JAVA_INT_UNALIGNED, i * CARRIER_SIZE);
160 }
161 return res;
162 }
163
164 @Benchmark
165 public int segment_loop_slice() {
166 int sum = 0;
167 MemorySegment base = segment.asSlice(0, segment.byteSize());
168 for (int i = 0; i < ELEM_SIZE; i++) {
169 sum += (int) VH_INT.get(base, (long) i);
170 }
171 return sum;
172 }
173
174 @Benchmark
175 public int segment_loop_readonly() {
176 int sum = 0;
177 MemorySegment base = segment.asReadOnly();
178 for (int i = 0; i < ELEM_SIZE; i++) {
179 sum += (int) VH_INT.get(base, (long) i);
180 }
181 return sum;
182 }
183
184 @Benchmark
185 public int BB_loop() {
186 int sum = 0;
187 ByteBuffer bb = byteBuffer;
188 for (int i = 0; i < ELEM_SIZE; i++) {
189 sum += bb.getInt(i * CARRIER_SIZE);
190 }
191 return sum;
192 }
193
194 }