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 package org.openjdk.bench.jdk.incubator.foreign; 24 25 import jdk.incubator.foreign.MemoryAccess; 26 import jdk.incubator.foreign.MemoryAddress; 27 import jdk.incubator.foreign.MemoryLayout; 28 import jdk.incubator.foreign.MemorySegment; 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.Param; 36 import org.openjdk.jmh.annotations.Setup; 37 import org.openjdk.jmh.annotations.State; 38 import org.openjdk.jmh.annotations.TearDown; 39 import org.openjdk.jmh.annotations.Warmup; 40 import sun.misc.Unsafe; 41 42 import java.lang.invoke.VarHandle; 43 import java.nio.ByteBuffer; 44 import java.nio.ByteOrder; 45 import java.util.concurrent.TimeUnit; 46 47 import static jdk.incubator.foreign.MemoryLayout.PathElement.sequenceElement; 48 import static jdk.incubator.foreign.MemoryLayouts.JAVA_INT; 49 50 @BenchmarkMode(Mode.AverageTime) 51 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS) 52 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS) 53 @State(org.openjdk.jmh.annotations.Scope.Thread) 54 @OutputTimeUnit(TimeUnit.MILLISECONDS) 55 @Fork(value = 3, jvmArgsAppend = { "--add-modules=jdk.incubator.foreign" }) 56 public class LoopOverNonConstantHeap { 57 58 static final Unsafe unsafe = Utils.unsafe; 59 60 static final int ELEM_SIZE = 1_000_000; 61 static final int CARRIER_SIZE = (int)JAVA_INT.byteSize(); 62 static final int ALLOC_SIZE = ELEM_SIZE * CARRIER_SIZE; 63 static final int UNSAFE_BYTE_BASE = unsafe.arrayBaseOffset(byte[].class); 64 65 static final VarHandle VH_int = MemoryLayout.ofSequence(JAVA_INT).varHandle(int.class, sequenceElement()); 66 MemorySegment segment; 67 byte[] base; 68 69 ByteBuffer byteBuffer; 70 71 @Param(value = {"false", "true"}) 72 boolean polluteProfile; 73 74 @Setup setup()75 public void setup() { 76 if (polluteProfile) { 77 MemorySegment intB = MemorySegment.ofArray(new byte[ALLOC_SIZE]); 78 MemorySegment intI = MemorySegment.ofArray(new int[ALLOC_SIZE]); 79 MemorySegment intD = MemorySegment.ofArray(new double[ALLOC_SIZE]); 80 MemorySegment intF = MemorySegment.ofArray(new float[ALLOC_SIZE]); 81 try (MemorySegment s = MemorySegment.allocateNative(ALLOC_SIZE)) { 82 for (int i = 0; i < ALLOC_SIZE; i++) { 83 MemoryAccess.setByteAtOffset(intB, i, (byte)i); 84 MemoryAccess.setIntAtIndex(intI, i, i); 85 MemoryAccess.setDoubleAtIndex(intD, i, i); 86 MemoryAccess.setFloatAtIndex(intF, i, i); 87 MemoryAccess.setByteAtOffset(s, i, (byte) i); 88 } 89 } 90 } 91 92 base = new byte[ALLOC_SIZE]; 93 for (int i = 0; i < ELEM_SIZE; i++) { 94 unsafe.putInt(base, UNSAFE_BYTE_BASE + (i * CARRIER_SIZE) , i); 95 } 96 segment = MemorySegment.ofArray(base); 97 byteBuffer = ByteBuffer.wrap(base).order(ByteOrder.nativeOrder()); 98 } 99 100 @TearDown tearDown()101 public void tearDown() { 102 segment.close(); 103 } 104 105 @Benchmark 106 @OutputTimeUnit(TimeUnit.NANOSECONDS) unsafe_get()107 public int unsafe_get() { 108 return unsafe.getInt(base, UNSAFE_BYTE_BASE); 109 } 110 111 @Benchmark 112 @OutputTimeUnit(TimeUnit.NANOSECONDS) segment_get()113 public int segment_get() { 114 return (int) VH_int.get(segment, 0L); 115 } 116 117 @Benchmark 118 @OutputTimeUnit(TimeUnit.NANOSECONDS) BB_get()119 public int BB_get() { 120 return byteBuffer.getInt(0); 121 } 122 123 @Benchmark unsafe_loop()124 public int unsafe_loop() { 125 int res = 0; 126 for (int i = 0; i < ELEM_SIZE; i ++) { 127 res += unsafe.getInt(base, UNSAFE_BYTE_BASE + (i * CARRIER_SIZE)); 128 } 129 return res; 130 } 131 132 @Benchmark segment_loop()133 public int segment_loop() { 134 int sum = 0; 135 for (int i = 0; i < ELEM_SIZE; i++) { 136 sum += (int) VH_int.get(segment, (long) i); 137 } 138 return sum; 139 } 140 141 @Benchmark segment_loop_static()142 public int segment_loop_static() { 143 int res = 0; 144 for (int i = 0; i < ELEM_SIZE; i ++) { 145 res += MemoryAccess.getIntAtIndex(segment, i); 146 } 147 return res; 148 } 149 150 @Benchmark segment_loop_slice()151 public int segment_loop_slice() { 152 int sum = 0; 153 MemorySegment base = segment.asSlice(0, segment.byteSize()); 154 for (int i = 0; i < ELEM_SIZE; i++) { 155 sum += (int) VH_int.get(base, (long) i); 156 } 157 return sum; 158 } 159 160 @Benchmark segment_loop_readonly()161 public int segment_loop_readonly() { 162 int sum = 0; 163 MemorySegment base = segment.withAccessModes(MemorySegment.READ); 164 for (int i = 0; i < ELEM_SIZE; i++) { 165 sum += (int) VH_int.get(base, (long) i); 166 } 167 return sum; 168 } 169 170 @Benchmark BB_loop()171 public int BB_loop() { 172 int sum = 0; 173 ByteBuffer bb = byteBuffer; 174 for (int i = 0; i < ELEM_SIZE; i++) { 175 sum += bb.getInt(i * CARRIER_SIZE); 176 } 177 return sum; 178 } 179 180 } 181