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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 * 25 */ 26 27 package org.openjdk.bench.jdk.incubator.foreign; 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.State; 36 import org.openjdk.jmh.annotations.Warmup; 37 import sun.misc.Unsafe; 38 39 import jdk.incubator.foreign.MemorySegment; 40 import java.util.concurrent.TimeUnit; 41 42 import static jdk.incubator.foreign.MemoryLayouts.JAVA_INT; 43 44 @BenchmarkMode(Mode.AverageTime) 45 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS) 46 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS) 47 @State(org.openjdk.jmh.annotations.Scope.Thread) 48 @OutputTimeUnit(TimeUnit.MILLISECONDS) 49 @Fork(3) 50 public class BulkOps { 51 52 static final Unsafe unsafe = Utils.unsafe; 53 54 static final int ELEM_SIZE = 1_000_000; 55 static final int CARRIER_SIZE = (int)JAVA_INT.byteSize(); 56 static final int ALLOC_SIZE = ELEM_SIZE * CARRIER_SIZE; 57 58 static final long unsafe_addr = unsafe.allocateMemory(ALLOC_SIZE); 59 static final MemorySegment segment = MemorySegment.allocateNative(ALLOC_SIZE); 60 61 static final int[] bytes = new int[ELEM_SIZE]; 62 static final MemorySegment bytesSegment = MemorySegment.ofArray(bytes); 63 static final int UNSAFE_INT_OFFSET = unsafe.arrayBaseOffset(int[].class); 64 65 static { 66 for (int i = 0 ; i < bytes.length ; i++) { 67 bytes[i] = i; 68 } 69 } 70 71 @Benchmark 72 @OutputTimeUnit(TimeUnit.NANOSECONDS) 73 public void unsafe_fill() { 74 unsafe.setMemory(unsafe_addr, ALLOC_SIZE, (byte)0); 75 } 76 77 @Benchmark 78 @OutputTimeUnit(TimeUnit.NANOSECONDS) 79 public void segment_fill() { 80 segment.fill((byte)0); 81 } 82 83 @Benchmark 84 @OutputTimeUnit(TimeUnit.NANOSECONDS) 85 public void unsafe_copy() { 86 unsafe.copyMemory(bytes, UNSAFE_INT_OFFSET, null, unsafe_addr, ALLOC_SIZE); 87 } 88 89 @Benchmark 90 @OutputTimeUnit(TimeUnit.NANOSECONDS) 91 public void segment_copy() { 92 segment.copyFrom(bytesSegment); 93 } 94 }