290 lines
9.5 KiB
Java
290 lines
9.5 KiB
Java
/*
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* Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.java.nio;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Param;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.Warmup;
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import java.nio.*;
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import java.util.concurrent.TimeUnit;
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import static java.nio.ByteOrder.*;
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/**
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* Benchmark for memory access operations on java.nio.Buffer ( and its views )
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*
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* A large number of variants are covered. The individual benchmarks conform to
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* the following convention:
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* test(Direct|Heap)(Bulk|Loop)(Get|Put)Double(View)?(Swap)?(RO)?
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*
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* This allows to easily run a subset of particular interest. For example:
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* Direct only :- "org.openjdk.bench.java.nio.DoubleBuffers.testDirect.*"
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* Bulk only :- "org.openjdk.bench.java.nio.DoubleBuffers.test.*Bulk.*"
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* Loop Put Swapped Views: -
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* test(Direct|Heap)(Loop)(Put)Double(View)+(Swap)+"
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*/
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@BenchmarkMode(Mode.AverageTime)
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@Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
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@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Thread)
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@Fork(3)
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public class DoubleBuffers {
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static final int CARRIER_BYTE_WIDTH = 8;
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@Param({"16", "1024", "131072"})
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private int size;
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public double doubleValue;
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public double[] doubleArray;
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public DoubleBuffer heapDoubleBuffer;
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public DoubleBuffer heapDoubleBufferRO;
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public DoubleBuffer heapByteBufferAsDoubleBufferView;
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public DoubleBuffer heapByteBufferAsDoubleBufferViewRO;
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public DoubleBuffer heapByteBufferAsDoubleBufferViewSwap;
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public DoubleBuffer heapByteBufferAsDoubleBufferViewSwapRO;
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public DoubleBuffer directByteBufferAsDoubleBufferView;
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public DoubleBuffer directByteBufferAsDoubleBufferViewRO;
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public DoubleBuffer directByteBufferAsDoubleBufferViewSwap;
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public DoubleBuffer directByteBufferAsDoubleBufferViewSwapRO;
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@Setup
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public void setup() {
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doubleArray = new double[size / CARRIER_BYTE_WIDTH];
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// explicitly allocated heap carrier buffer
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heapDoubleBuffer = DoubleBuffer.allocate(size / CARRIER_BYTE_WIDTH);
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heapDoubleBufferRO = DoubleBuffer.allocate(size / CARRIER_BYTE_WIDTH).asReadOnlyBuffer();
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// ByteBuffer views
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heapByteBufferAsDoubleBufferView = ByteBuffer.allocate(size).order(nativeOrder()).asDoubleBuffer();
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heapByteBufferAsDoubleBufferViewRO = ByteBuffer.allocate(size).order(nativeOrder()).asDoubleBuffer().asReadOnlyBuffer();
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directByteBufferAsDoubleBufferView = ByteBuffer.allocateDirect(size).order(nativeOrder()).asDoubleBuffer();
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directByteBufferAsDoubleBufferViewRO = ByteBuffer.allocateDirect(size).order(nativeOrder()).asDoubleBuffer().asReadOnlyBuffer();
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// endianness swapped
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ByteOrder nonNativeOrder = nativeOrder() == BIG_ENDIAN ? LITTLE_ENDIAN : BIG_ENDIAN;
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heapByteBufferAsDoubleBufferViewSwap = ByteBuffer.allocate(size).order(nonNativeOrder).asDoubleBuffer();
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heapByteBufferAsDoubleBufferViewSwapRO = ByteBuffer.allocate(size).order(nonNativeOrder).asDoubleBuffer().asReadOnlyBuffer();
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directByteBufferAsDoubleBufferViewSwap = ByteBuffer.allocateDirect(size).order(nonNativeOrder).asDoubleBuffer();
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directByteBufferAsDoubleBufferViewSwapRO = ByteBuffer.allocateDirect(size).order(nonNativeOrder).asDoubleBuffer().asReadOnlyBuffer();
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}
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// ---------------- HELPER METHODS
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private double innerLoopGetDouble(DoubleBuffer buf) {
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double r = 0;
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for (int i = 0; i < buf.capacity(); i++) {
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r += buf.get(i);
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}
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return r;
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}
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private void innerLoopPutDouble(DoubleBuffer buf) {
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for (int i = 0; i < buf.capacity(); i++) {
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buf.put(i, doubleValue);
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}
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}
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// -- Heap___
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@Benchmark
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public double[] testHeapBulkPutDouble() {
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heapDoubleBuffer.put(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double[] testHeapBulkGetDouble() {
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heapDoubleBuffer.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public void testHeapLoopPutDouble() {
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innerLoopPutDouble(heapDoubleBuffer);
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}
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@Benchmark
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public double testHeapLoopGetDouble() {
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return innerLoopGetDouble(heapDoubleBuffer);
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}
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// -- Heap_View_Swap_RO
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@Benchmark
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public double[] testHeapBulkGetDoubleViewSwapRO() {
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heapByteBufferAsDoubleBufferViewSwapRO.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double testHeapLoopGetDoubleViewSwapRO() {
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return innerLoopGetDouble(heapByteBufferAsDoubleBufferViewSwapRO);
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}
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// -- Heap_View_Swap_
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@Benchmark
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public double[] testHeapBulkPutDoubleViewSwap() {
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heapByteBufferAsDoubleBufferViewSwap.put(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double[] testHeapBulkGetDoubleViewSwap() {
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heapByteBufferAsDoubleBufferViewSwap.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public void testHeapLoopPutDoubleViewSwap() {
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innerLoopPutDouble(heapByteBufferAsDoubleBufferViewSwap);
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}
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@Benchmark
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public double testHeapLoopGetDoubleViewSwap() {
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return innerLoopGetDouble(heapByteBufferAsDoubleBufferViewSwap);
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}
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// -- Heap_View__RO
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@Benchmark
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public double[] testHeapBulkGetDoubleViewRO() {
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heapByteBufferAsDoubleBufferViewRO.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double testHeapLoopGetDoubleViewRO() {
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return innerLoopGetDouble(heapByteBufferAsDoubleBufferViewRO);
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}
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// -- Heap_View__
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@Benchmark
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public double[] testHeapBulkPutDoubleView() {
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heapByteBufferAsDoubleBufferView.put(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double[] testHeapBulkGetDoubleView() {
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heapByteBufferAsDoubleBufferView.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public void testHeapLoopPutDoubleView() {
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innerLoopPutDouble(heapByteBufferAsDoubleBufferView);
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}
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@Benchmark
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public double testHeapLoopGetDoubleView() {
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return innerLoopGetDouble(heapByteBufferAsDoubleBufferView);
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}
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// -- Direct_View_Swap_RO
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@Benchmark
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public double[] testDirectBulkGetDoubleViewSwapRO() {
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directByteBufferAsDoubleBufferViewSwapRO.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double testDirectLoopGetDoubleViewSwapRO() {
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return innerLoopGetDouble(directByteBufferAsDoubleBufferViewSwapRO);
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}
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// -- Direct_View_Swap_
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@Benchmark
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public double[] testDirectBulkPutDoubleViewSwap() {
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directByteBufferAsDoubleBufferViewSwap.put(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double[] testDirectBulkGetDoubleViewSwap() {
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directByteBufferAsDoubleBufferViewSwap.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public void testDirectLoopPutDoubleViewSwap() {
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innerLoopPutDouble(directByteBufferAsDoubleBufferViewSwap);
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}
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@Benchmark
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public double testDirectLoopGetDoubleViewSwap() {
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return innerLoopGetDouble(directByteBufferAsDoubleBufferViewSwap);
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}
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// -- Direct_View__RO
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@Benchmark
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public double[] testDirectBulkGetDoubleViewRO() {
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directByteBufferAsDoubleBufferViewRO.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double testDirectLoopGetDoubleViewRO() {
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return innerLoopGetDouble(directByteBufferAsDoubleBufferViewRO);
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}
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// -- Direct_View__
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@Benchmark
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public double[] testDirectBulkPutDoubleView() {
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directByteBufferAsDoubleBufferView.put(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public double[] testDirectBulkGetDoubleView() {
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directByteBufferAsDoubleBufferView.get(0, doubleArray);
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return doubleArray;
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}
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@Benchmark
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public void testDirectLoopPutDoubleView() {
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innerLoopPutDouble(directByteBufferAsDoubleBufferView);
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}
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@Benchmark
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public double testDirectLoopGetDoubleView() {
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return innerLoopGetDouble(directByteBufferAsDoubleBufferView);
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}
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}
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