1 /*
2 * Copyright (c) 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
39 import java.nio.ByteBuffer;
40 import java.nio.ByteOrder;
41 import java.nio.IntBuffer;
42 import java.util.Iterator;
43 import java.util.concurrent.TimeUnit;
44
45 import static java.lang.foreign.ValueLayout.JAVA_INT;
46
47 @BenchmarkMode(Mode.AverageTime)
48 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
49 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
50 @State(org.openjdk.jmh.annotations.Scope.Thread)
51 @OutputTimeUnit(TimeUnit.MILLISECONDS)
52 @Fork(value = 3, jvmArgsAppend = { "--enable-preview", "--enable-native-access=ALL-UNNAMED" })
53
54 public class LoopOverSlice {
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 nativeSegment, heapSegment;
62 IntBuffer nativeBuffer, heapBuffer;
63
64 @Setup
65 public void setup() {
66 arena = Arena.ofConfined();
67 nativeSegment = arena.allocate(ALLOC_SIZE, 1);
68 heapSegment = MemorySegment.ofArray(new int[ELEM_SIZE]);
69 nativeBuffer = ByteBuffer.allocateDirect(ALLOC_SIZE).order(ByteOrder.LITTLE_ENDIAN).asIntBuffer();
70 heapBuffer = IntBuffer.wrap(new int[ELEM_SIZE]);
71 }
72
73 @TearDown
74 public void tearDown() {
75 arena.close();
76 }
77
78 @Benchmark
79 public void native_segment_slice_loop() {
80 new NativeSegmentWrapper(nativeSegment).forEach(NativeSegmentWrapper.Element::get);
81 }
82
83 @Benchmark
84 public void native_buffer_slice_loop() {
85 new NativeBufferWrapper(nativeBuffer).forEach(NativeBufferWrapper.Element::get);
86 }
87
88 @Benchmark
89 public void heap_segment_slice_loop() {
90 new HeapSegmentWrapper(heapSegment).forEach(HeapSegmentWrapper.Element::get);
91 }
92
93 @Benchmark
94 public void heap_buffer_slice_loop() {
95 new HeapBufferWrapper(heapBuffer).forEach(HeapBufferWrapper.Element::get);
96 }
97
98 class HeapSegmentWrapper implements Iterable<HeapSegmentWrapper.Element> {
99 final MemorySegment segment;
100
101 public HeapSegmentWrapper(MemorySegment segment) {
102 this.segment = segment;
103 }
104
105 @Override
106 public Iterator<Element> iterator() {
107 return new Iterator<Element>() {
108
109 MemorySegment current = segment;
110
111 @Override
112 public boolean hasNext() {
113 return current.byteSize() > 4;
114 }
115
116 @Override
117 public Element next() {
118 Element element = new Element(current);
119 current = current.asSlice(4);
120 return element;
121 }
122 };
123 }
124
125 static class Element {
126 final MemorySegment segment;
127
128 public Element(MemorySegment segment) {
129 this.segment = segment;
130 }
131
132 int get() {
133 return segment.getAtIndex(JAVA_INT, 0);
134 }
135 }
136 }
137
138 class NativeSegmentWrapper implements Iterable<NativeSegmentWrapper.Element> {
139 final MemorySegment segment;
140
141 public NativeSegmentWrapper(MemorySegment segment) {
142 this.segment = segment;
143 }
144
145 @Override
146 public Iterator<Element> iterator() {
147 return new Iterator<Element>() {
148
149 MemorySegment current = segment;
150
151 @Override
152 public boolean hasNext() {
153 return current.byteSize() > 4;
154 }
155
156 @Override
157 public Element next() {
158 Element element = new Element(current);
159 current = current.asSlice(4);
160 return element;
161 }
162 };
163 }
164
165 static class Element {
166 final MemorySegment segment;
167
168 public Element(MemorySegment segment) {
169 this.segment = segment;
170 }
171
172 int get() {
173 return segment.getAtIndex(JAVA_INT, 0);
174 }
175 }
176 }
177
178 class NativeBufferWrapper implements Iterable<NativeBufferWrapper.Element> {
179 final IntBuffer buffer;
180
181 public NativeBufferWrapper(IntBuffer buffer) {
182 this.buffer = buffer;
183 }
184
185 @Override
186 public Iterator<Element> iterator() {
187 return new Iterator<Element>() {
188
189 IntBuffer current = buffer;
190
191 @Override
192 public boolean hasNext() {
193 return current.position() < current.limit();
194 }
195
196 @Override
197 public Element next() {
198 Element element = new Element(current);
199 int lim = current.limit();
200 current = current.slice(1, lim - 1);
201 return element;
202 }
203 };
204 }
205
206 static class Element {
207 final IntBuffer buffer;
208
209 public Element(IntBuffer segment) {
210 this.buffer = segment;
211 }
212
213 int get() {
214 return buffer.get( 0);
215 }
216 }
217 }
218
219 class HeapBufferWrapper implements Iterable<HeapBufferWrapper.Element> {
220 final IntBuffer buffer;
221
222 public HeapBufferWrapper(IntBuffer buffer) {
223 this.buffer = buffer;
224 }
225
226 @Override
227 public Iterator<Element> iterator() {
228 return new Iterator<Element>() {
229
230 IntBuffer current = buffer;
231
232 @Override
233 public boolean hasNext() {
234 return current.position() < current.limit();
235 }
236
237 @Override
238 public Element next() {
239 Element element = new Element(current);
240 int lim = current.limit();
241 current = current.slice(1, lim - 1);
242 return element;
243 }
244 };
245 }
246
247 static class Element {
248 final IntBuffer buffer;
249
250 public Element(IntBuffer segment) {
251 this.buffer = segment;
252 }
253
254 int get() {
255 return buffer.get( 0);
256 }
257 }
258 }
259 }