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 org.openjdk.jmh.annotations.Benchmark; 28 import org.openjdk.jmh.annotations.BenchmarkMode; 29 import org.openjdk.jmh.annotations.Fork; 30 import org.openjdk.jmh.annotations.Measurement; 31 import org.openjdk.jmh.annotations.Mode; 32 import org.openjdk.jmh.annotations.OutputTimeUnit; 33 import org.openjdk.jmh.annotations.State; 34 import org.openjdk.jmh.annotations.Warmup; 35 import sun.misc.Unsafe; 36 37 import jdk.incubator.foreign.MemorySegment; 38 import java.util.concurrent.TimeUnit; 39 40 import static jdk.incubator.foreign.MemoryLayouts.JAVA_INT; 41 42 @BenchmarkMode(Mode.AverageTime) 43 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS) 44 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS) 45 @State(org.openjdk.jmh.annotations.Scope.Thread) 46 @OutputTimeUnit(TimeUnit.MILLISECONDS) 47 @Fork(3) 48 public class BulkOps { 49 50 static final Unsafe unsafe = Utils.unsafe; 51 52 static final int ELEM_SIZE = 1_000_000; 53 static final int CARRIER_SIZE = (int)JAVA_INT.byteSize(); 54 static final int ALLOC_SIZE = ELEM_SIZE * CARRIER_SIZE; 55 56 static final long unsafe_addr = unsafe.allocateMemory(ALLOC_SIZE); 57 static final MemorySegment segment = MemorySegment.allocateNative(ALLOC_SIZE); 58 59 static final int[] bytes = new int[ELEM_SIZE]; 60 static final MemorySegment bytesSegment = MemorySegment.ofArray(bytes); 61 static final int UNSAFE_INT_OFFSET = unsafe.arrayBaseOffset(int[].class); 62 63 static { 64 for (int i = 0 ; i < bytes.length ; i++) { 65 bytes[i] = i; 66 } 67 } 68 69 @Benchmark 70 @OutputTimeUnit(TimeUnit.NANOSECONDS) 71 public void unsafe_fill() { 72 unsafe.setMemory(unsafe_addr, ALLOC_SIZE, (byte)0); 73 } 74 75 @Benchmark 76 @OutputTimeUnit(TimeUnit.NANOSECONDS) 77 public void segment_fill() { 78 segment.fill((byte)0); 79 } 80 81 @Benchmark 82 @OutputTimeUnit(TimeUnit.NANOSECONDS) 83 public void unsafe_copy() { 84 unsafe.copyMemory(bytes, UNSAFE_INT_OFFSET, null, unsafe_addr, ALLOC_SIZE); 85 } 86 87 @Benchmark 88 @OutputTimeUnit(TimeUnit.NANOSECONDS) 89 public void segment_copy() { 90 segment.copyFrom(bytesSegment); 91 } 92 }