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 */
24
25 package org.openjdk.bench.java.lang.foreign;
26
27 import java.lang.foreign.MemorySegment;
28
29 import org.openjdk.jmh.annotations.Benchmark;
30 import org.openjdk.jmh.annotations.BenchmarkMode;
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.Setup;
36 import org.openjdk.jmh.annotations.State;
37 import org.openjdk.jmh.annotations.Warmup;
38
39 import java.lang.invoke.MethodHandle;
40 import java.lang.invoke.MethodHandles;
41 import java.lang.invoke.MethodType;
42 import java.lang.invoke.VarHandle;
43 import java.util.concurrent.TimeUnit;
44
45 @BenchmarkMode(Mode.AverageTime)
46 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
47 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
48 @State(org.openjdk.jmh.annotations.Scope.Thread)
49 @OutputTimeUnit(TimeUnit.MILLISECONDS)
50 @Fork(3)
51 public class TestAdaptVarHandles extends JavaLayouts {
52
53 static class IntBox {
54
55 private final int value;
56
57 IntBox(int value) {
58 this.value = value;
59 }
60
61 int intValue() {
62 return value;
63 }
64 }
65
66 static final int ELEM_SIZE = 1_000_000;
67
68 static final MethodHandle INT_TO_INTBOX;
69 static final MethodHandle INTBOX_TO_INT;
70
71 static {
72 try {
73 INT_TO_INTBOX = MethodHandles.lookup()
74 .findConstructor(IntBox.class, MethodType.methodType(void.class, int.class));
75 INTBOX_TO_INT = MethodHandles.lookup()
76 .findVirtual(IntBox.class, "intValue", MethodType.methodType(int.class));
77 } catch (Throwable ex) {
78 throw new ExceptionInInitializerError(ex);
79 }
80 }
81
82 static final VarHandle VH_ARR_INT = MethodHandles.arrayElementVarHandle(int[].class);
83
84 static final VarHandle VH_BOX_ARR_INT = MethodHandles.filterValue(VH_ARR_INT, INTBOX_TO_INT, INT_TO_INTBOX);
85
86 static final VarHandle VH_BOX_INT = MethodHandles.filterValue(VH_INT, INTBOX_TO_INT, INT_TO_INTBOX);
87
88 static final MethodHandle MH_INT = VH_ARR_INT.toMethodHandle(VarHandle.AccessMode.GET);
89
90 static final MethodHandle MH_BOX_INT = MethodHandles.filterReturnValue(MH_INT, INT_TO_INTBOX);
91
92 int[] base = new int[ELEM_SIZE];
93 MemorySegment segment = MemorySegment.ofArray(base);
94
95 @Setup
96 public void setup() {
97 for (int i = 0; i < ELEM_SIZE; i++) {
98 base[i] = i;
99 }
100 }
101
102 @Benchmark
103 public int vh_loop() throws Throwable {
104 int sum = 0;
105 for (int i = 0; i < ELEM_SIZE; i++) {
106 sum += (int) VH_ARR_INT.get(base, i);
107 }
108 return sum;
109 }
110
111 @Benchmark
112 public int vh_box_loop() throws Throwable {
113 int sum = 0;
114 for (int i = 0; i < ELEM_SIZE; i++) {
115 sum += ((IntBox) VH_BOX_ARR_INT.get(base, i)).intValue();
116 }
117 return sum;
118 }
119
120 @Benchmark
121 public int mh_loop() throws Throwable {
122 int sum = 0;
123 for (int i = 0; i < ELEM_SIZE; i++) {
124 sum += (int) MH_INT.invokeExact(base, i);
125 }
126 return sum;
127 }
128
129 @Benchmark
130 public int mh_box_loop() throws Throwable {
131 int sum = 0;
132 for (int i = 0; i < ELEM_SIZE; i++) {
133 sum += ((IntBox) MH_BOX_INT.invokeExact(base, i)).intValue();
134 }
135 return sum;
136 }
137
138 @Benchmark
139 public int segment_loop() throws Throwable {
140 int sum = 0;
141 for (int i = 0; i < ELEM_SIZE; i++) {
142 sum += (int)VH_INT.get(segment, (long)i);
143 }
144 return sum;
145 }
146
147 @Benchmark
148 public int segment_box_loop() throws Throwable {
149 int sum = 0;
150 for (int i = 0; i < ELEM_SIZE; i++) {
151 sum += ((IntBox)VH_BOX_INT.get(segment, (long)i)).intValue();
152 }
153 return sum;
154 }
155 }