1 /* 2 * Copyright (c) 2020, 2025, 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 org.openjdk.jmh.annotations.Benchmark; 28 import org.openjdk.jmh.annotations.BenchmarkMode; 29 import org.openjdk.jmh.annotations.CompilerControl; 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 jdk.internal.misc.Unsafe; 39 40 import java.lang.foreign.Arena; 41 import java.lang.foreign.MemorySegment; 42 import java.nio.ByteBuffer; 43 import java.nio.IntBuffer; 44 import java.util.concurrent.TimeUnit; 45 46 import static java.lang.foreign.ValueLayout.JAVA_INT; 47 import static java.lang.foreign.ValueLayout.JAVA_INT_UNALIGNED; 48 49 @BenchmarkMode(Mode.AverageTime) 50 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS) 51 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS) 52 @State(org.openjdk.jmh.annotations.Scope.Thread) 53 @OutputTimeUnit(TimeUnit.MILLISECONDS) 54 @Fork(value = 3, jvmArgs = { "--add-opens=java.base/jdk.internal.misc=ALL-UNNAMED" }) 55 public class BulkOps { 56 57 static final Unsafe unsafe = Utils.unsafe; 58 59 static final int ELEM_SIZE = 1_000_000; 60 static final int CARRIER_SIZE = (int)JAVA_INT.byteSize(); 61 static final int ALLOC_SIZE = ELEM_SIZE * CARRIER_SIZE; 62 63 final Arena arena = Arena.ofShared(); 64 65 final long unsafe_addr = unsafe.allocateMemory(ALLOC_SIZE); 66 final MemorySegment segment = arena.allocate(ALLOC_SIZE, 1); 67 68 final IntBuffer buffer = IntBuffer.allocate(ELEM_SIZE); 69 70 final int[] ints = new int[ELEM_SIZE]; 71 @SuppressWarnings("initialization") 72 final MemorySegment bytesSegment = MemorySegment.ofArray(ints); 73 final long UNSAFE_INT_OFFSET = unsafe.arrayBaseOffset(int[].class); 74 75 // large(ish) segments/buffers with same content, 0, for mismatch, non-multiple-of-8 sized 76 static final int SIZE_WITH_TAIL = (1024 * 1024) + 7; 77 final MemorySegment mismatchSegmentLarge1; 78 79 { 80 mismatchSegmentLarge1 = arena.allocate(SIZE_WITH_TAIL, 1); 81 } 82 83 final MemorySegment mismatchSegmentLarge2 = arena.allocate(SIZE_WITH_TAIL, 1); 84 final ByteBuffer mismatchBufferLarge1 = ByteBuffer.allocateDirect(SIZE_WITH_TAIL); 85 final ByteBuffer mismatchBufferLarge2 = ByteBuffer.allocateDirect(SIZE_WITH_TAIL); 86 87 // mismatch at first byte 88 final MemorySegment mismatchSegmentSmall1 = arena.allocate(7, 1); 89 final MemorySegment mismatchSegmentSmall2 = arena.allocate(7, 1); 90 final ByteBuffer mismatchBufferSmall1 = ByteBuffer.allocateDirect(7); 91 final ByteBuffer mismatchBufferSmall2 = ByteBuffer.allocateDirect(7); 92 93 @Setup 94 public void setup() { 95 mismatchSegmentSmall1.fill((byte) 0xFF); 96 mismatchBufferSmall1.put((byte) 0xFF).clear(); 97 // verify expected mismatch indices 98 long si = mismatchSegmentLarge1.mismatch(mismatchSegmentLarge2); 99 if (si != -1) 100 throw new AssertionError("Unexpected mismatch index:" + si); 101 int bi = mismatchBufferLarge1.mismatch(mismatchBufferLarge2); 102 if (bi != -1) 103 throw new AssertionError("Unexpected mismatch index:" + bi); 104 si = mismatchSegmentSmall1.mismatch(mismatchSegmentSmall2); 105 if (si != 0) 106 throw new AssertionError("Unexpected mismatch index:" + si); 107 bi = mismatchBufferSmall1.mismatch(mismatchBufferSmall2); 108 if (bi != 0) 109 throw new AssertionError("Unexpected mismatch index:" + bi); 110 111 for (int i = 0; i < ints.length ; i++) { 112 ints[i] = i; 113 } 114 } 115 116 @TearDown 117 public void tearDown() { 118 arena.close(); 119 } 120 121 @Benchmark 122 @OutputTimeUnit(TimeUnit.NANOSECONDS) 123 public void unsafe_fill() { 124 unsafe.setMemory(unsafe_addr, ALLOC_SIZE, (byte)42); 125 } 126 127 @Benchmark 128 @OutputTimeUnit(TimeUnit.NANOSECONDS) 129 public void segment_fill() { 130 segment.fill((byte)42); 131 } 132 133 @Benchmark 134 @OutputTimeUnit(TimeUnit.NANOSECONDS) 135 public void unsafe_copy() { 136 unsafe.copyMemory(ints, UNSAFE_INT_OFFSET, null, unsafe_addr, ALLOC_SIZE); 137 } 138 139 @Benchmark 140 @OutputTimeUnit(TimeUnit.NANOSECONDS) 141 public void segment_copy() { 142 segment.copyFrom(bytesSegment); 143 } 144 145 @Benchmark 146 @OutputTimeUnit(TimeUnit.NANOSECONDS) 147 public void segment_copy_static() { 148 MemorySegment.copy(ints, 0, segment, JAVA_INT_UNALIGNED, 0, ints.length); 149 } 150 151 @Benchmark 152 @OutputTimeUnit(TimeUnit.NANOSECONDS) 153 public void segment_copy_static_small() { 154 MemorySegment.copy(ints, 0, segment, JAVA_INT_UNALIGNED, 0, 10); 155 } 156 157 @Benchmark 158 @CompilerControl(CompilerControl.Mode.DONT_INLINE) 159 @OutputTimeUnit(TimeUnit.NANOSECONDS) 160 public void segment_copy_static_small_dontinline() { 161 MemorySegment.copy(ints, 0, segment, JAVA_INT_UNALIGNED, 0, 10); 162 } 163 164 @Benchmark 165 @OutputTimeUnit(TimeUnit.NANOSECONDS) 166 public void unsafe_copy_small() { 167 unsafe.copyMemory(ints, UNSAFE_INT_OFFSET, null, unsafe_addr, 10 * CARRIER_SIZE); 168 } 169 170 @Benchmark 171 @OutputTimeUnit(TimeUnit.NANOSECONDS) 172 public void buffer_copy_small() { 173 buffer.put(0, ints, 0, 10); 174 } 175 176 @Benchmark 177 @OutputTimeUnit(TimeUnit.NANOSECONDS) 178 public void buffer_copy() { 179 buffer.put(0, ints, 0, ints.length); 180 } 181 182 @Benchmark 183 @CompilerControl(CompilerControl.Mode.DONT_INLINE) 184 @OutputTimeUnit(TimeUnit.NANOSECONDS) 185 public void segment_copy_static_dontinline() { 186 MemorySegment.copy(ints, 0, segment, JAVA_INT_UNALIGNED, 0, ints.length); 187 } 188 189 @Benchmark 190 @OutputTimeUnit(TimeUnit.NANOSECONDS) 191 public long mismatch_large_segment() { 192 return mismatchSegmentLarge1.mismatch(mismatchSegmentLarge2); 193 } 194 195 @Benchmark 196 @OutputTimeUnit(TimeUnit.NANOSECONDS) 197 public int mismatch_large_bytebuffer() { 198 return mismatchBufferLarge1.mismatch(mismatchBufferLarge2); 199 } 200 201 @Benchmark 202 @OutputTimeUnit(TimeUnit.NANOSECONDS) 203 public long mismatch_small_segment() { 204 return mismatchSegmentSmall1.mismatch(mismatchSegmentSmall2); 205 } 206 207 @Benchmark 208 @OutputTimeUnit(TimeUnit.NANOSECONDS) 209 public int mismatch_small_bytebuffer() { 210 return mismatchBufferSmall1.mismatch(mismatchBufferSmall2); 211 } 212 }