1 /* 2 * Copyright (c) 2020, 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.jdk.incubator.foreign; 26 27 import jdk.incubator.foreign.MemoryAddress; 28 import jdk.incubator.foreign.MemoryHandles; 29 import jdk.incubator.foreign.MemoryLayout; 30 import jdk.incubator.foreign.MemoryLayouts; 31 import jdk.incubator.foreign.MemorySegment; 32 import org.openjdk.jmh.annotations.Benchmark; 33 import org.openjdk.jmh.annotations.BenchmarkMode; 34 import org.openjdk.jmh.annotations.Fork; 35 import org.openjdk.jmh.annotations.Measurement; 36 import org.openjdk.jmh.annotations.Mode; 37 import org.openjdk.jmh.annotations.OutputTimeUnit; 38 import org.openjdk.jmh.annotations.Setup; 39 import org.openjdk.jmh.annotations.State; 40 import org.openjdk.jmh.annotations.Warmup; 41 42 import java.lang.invoke.MethodHandle; 43 import java.lang.invoke.MethodHandles; 44 import java.lang.invoke.MethodType; 45 import java.lang.invoke.VarHandle; 46 import java.util.concurrent.TimeUnit; 47 48 @BenchmarkMode(Mode.AverageTime) 49 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS) 50 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS) 51 @State(org.openjdk.jmh.annotations.Scope.Thread) 52 @OutputTimeUnit(TimeUnit.MILLISECONDS) 53 @Fork(value = 3, jvmArgsAppend = { "--add-modules=jdk.incubator.foreign" }) 54 public class TestAdaptVarHandles { 55 56 static class IntBox { 57 58 private final int value; 59 IntBox(int value)60 IntBox(int value) { 61 this.value = value; 62 } 63 intValue()64 int intValue() { 65 return value; 66 } 67 } 68 69 static final int ELEM_SIZE = 1_000_000; 70 71 static final MethodHandle INT_TO_INTBOX; 72 static final MethodHandle INTBOX_TO_INT; 73 74 static { 75 try { 76 INT_TO_INTBOX = MethodHandles.lookup() 77 .findConstructor(IntBox.class, MethodType.methodType(void.class, int.class)); 78 INTBOX_TO_INT = MethodHandles.lookup() 79 .findVirtual(IntBox.class, "intValue", MethodType.methodType(int.class)); 80 } catch (Throwable ex) { 81 throw new ExceptionInInitializerError(ex); 82 } 83 } 84 85 static final VarHandle VH_int = MethodHandles.arrayElementVarHandle(int[].class); 86 87 static final VarHandle VH_box_int = MemoryHandles.filterValue(VH_int, INTBOX_TO_INT, INT_TO_INTBOX); 88 89 static final VarHandle VH_addr_int = MemoryLayout.ofSequence(MemoryLayouts.JAVA_INT) 90 .varHandle(int.class, MemoryLayout.PathElement.sequenceElement()); 91 92 static final VarHandle VH_addr_box_int = MemoryHandles.filterValue(VH_addr_int, INTBOX_TO_INT, INT_TO_INTBOX); 93 94 static final MethodHandle MH_int = VH_int.toMethodHandle(VarHandle.AccessMode.GET); 95 96 static final MethodHandle MH_box_int = MethodHandles.filterReturnValue(MH_int, INT_TO_INTBOX); 97 98 int[] base = new int[ELEM_SIZE]; 99 MemorySegment segment = MemorySegment.ofArray(base); 100 101 @Setup setup()102 public void setup() { 103 for (int i = 0; i < ELEM_SIZE; i++) { 104 base[i] = i; 105 } 106 } 107 108 @Benchmark vh_loop()109 public int vh_loop() throws Throwable { 110 int sum = 0; 111 for (int i = 0; i < ELEM_SIZE; i++) { 112 sum += (int)VH_int.get(base, i); 113 } 114 return sum; 115 } 116 117 @Benchmark vh_box_loop()118 public int vh_box_loop() throws Throwable { 119 int sum = 0; 120 for (int i = 0; i < ELEM_SIZE; i++) { 121 sum += ((IntBox)VH_box_int.get(base, i)).intValue(); 122 } 123 return sum; 124 } 125 126 @Benchmark mh_loop()127 public int mh_loop() throws Throwable { 128 int sum = 0; 129 for (int i = 0; i < ELEM_SIZE; i++) { 130 sum += (int)MH_int.invokeExact(base, i); 131 } 132 return sum; 133 } 134 135 @Benchmark mh_box_loop()136 public int mh_box_loop() throws Throwable { 137 int sum = 0; 138 for (int i = 0; i < ELEM_SIZE; i++) { 139 sum += ((IntBox)MH_box_int.invokeExact(base, i)).intValue(); 140 } 141 return sum; 142 } 143 144 @Benchmark segment_loop()145 public int segment_loop() throws Throwable { 146 int sum = 0; 147 for (int i = 0; i < ELEM_SIZE; i++) { 148 sum += (int)VH_addr_int.get(segment, (long)i); 149 } 150 return sum; 151 } 152 153 @Benchmark segment_box_loop()154 public int segment_box_loop() throws Throwable { 155 int sum = 0; 156 for (int i = 0; i < ELEM_SIZE; i++) { 157 sum += ((IntBox)VH_addr_box_int.get(segment, (long)i)).intValue(); 158 } 159 return sum; 160 } 161 } 162