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.JAVA_INT;
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(3)
52 public class LoopOverNonConstantShared 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 Arena arena;
60 MemorySegment segment;
61 long unsafe_addr;
62
63 ByteBuffer byteBuffer;
64
65 @Setup
66 public void setup() {
67 unsafe_addr = unsafe.allocateMemory(ALLOC_SIZE);
68 for (int i = 0; i < ELEM_SIZE; i++) {
69 unsafe.putInt(unsafe_addr + (i * CARRIER_SIZE) , i);
70 }
71 arena = Arena.ofConfined();
72 segment = arena.allocate(ALLOC_SIZE, CARRIER_SIZE);
73 for (int i = 0; i < ELEM_SIZE; i++) {
74 VH_INT.set(segment, (long) i, i);
75 }
76 byteBuffer = ByteBuffer.allocateDirect(ALLOC_SIZE).order(ByteOrder.nativeOrder());
77 for (int i = 0; i < ELEM_SIZE; i++) {
78 byteBuffer.putInt(i * CARRIER_SIZE , i);
79 }
80 }
81
82 @TearDown
83 public void tearDown() {
84 arena.close();
85 unsafe.invokeCleaner(byteBuffer);
86 unsafe.freeMemory(unsafe_addr);
87 }
88
89 @Benchmark
90 @OutputTimeUnit(TimeUnit.NANOSECONDS)
91 public int unsafe_get() {
92 return unsafe.getInt(unsafe_addr);
93 }
94
95 @Benchmark
96 @OutputTimeUnit(TimeUnit.NANOSECONDS)
97 public int segment_get() {
98 return (int) VH_INT.get(segment, 0L);
99 }
100
101 @Benchmark
102 @OutputTimeUnit(TimeUnit.NANOSECONDS)
103 public int BB_get() {
104 return byteBuffer.getInt(0);
105 }
106
107 @Benchmark
108 public int unsafe_loop() {
109 int res = 0;
110 for (int i = 0; i < ELEM_SIZE; i ++) {
111 res += unsafe.getInt(unsafe_addr + (i * CARRIER_SIZE));
112 }
113 return res;
114 }
115
116 @Benchmark
117 public int segment_loop_instance() {
118 int res = 0;
119 for (int i = 0; i < ELEM_SIZE; i ++) {
120 res += segment.get(JAVA_INT, i * CARRIER_SIZE);
121 }
122 return res;
123 }
124
125 @Benchmark
126 public int segment_loop_instance_address() {
127 int res = 0;
128 for (int i = 0; i < ELEM_SIZE; i ++) {
129 res += segment.get(JAVA_INT, i * CARRIER_SIZE);
130 }
131 return res;
132 }
133
134 @Benchmark
135 public int segment_loop() {
136 int sum = 0;
137 for (int i = 0; i < ELEM_SIZE; i++) {
138 sum += (int) VH_INT.get(segment, (long) i);
139 }
140 return sum;
141 }
142
143 @Benchmark
144 public int segment_loop_slice() {
145 int sum = 0;
146 MemorySegment base = segment.asSlice(0, segment.byteSize());
147 for (int i = 0; i < ELEM_SIZE; i++) {
148 sum += (int) VH_INT.get(base, (long) i);
149 }
150 return sum;
151 }
152
153 @Benchmark
154 public int segment_loop_readonly() {
155 int sum = 0;
156 MemorySegment base = segment.asReadOnly();
157 for (int i = 0; i < ELEM_SIZE; i++) {
158 sum += (int) VH_INT.get(base, (long) i);
159 }
160 return sum;
161 }
162
163 @Benchmark
164 public int BB_loop() {
165 int sum = 0;
166 ByteBuffer bb = byteBuffer;
167 for (int i = 0; i < ELEM_SIZE; i++) {
168 sum += bb.getInt(i * CARRIER_SIZE);
169 }
170 return sum;
171 }
172
173 }