290 lines
9.1 KiB
Java
290 lines
9.1 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)Char(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.CharBuffers.testDirect.*"
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* Bulk only :- "org.openjdk.bench.java.nio.CharBuffers.test.*Bulk.*"
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* Loop Put Swapped Views: -
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* test(Direct|Heap)(Loop)(Put)Char(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 CharBuffers {
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static final int CARRIER_BYTE_WIDTH = 2;
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@Param({"16", "1024", "131072"})
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private int size;
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public char charValue;
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public char[] charArray;
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public CharBuffer heapCharBuffer;
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public CharBuffer heapCharBufferRO;
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public CharBuffer heapByteBufferAsCharBufferView;
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public CharBuffer heapByteBufferAsCharBufferViewRO;
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public CharBuffer heapByteBufferAsCharBufferViewSwap;
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public CharBuffer heapByteBufferAsCharBufferViewSwapRO;
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public CharBuffer directByteBufferAsCharBufferView;
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public CharBuffer directByteBufferAsCharBufferViewRO;
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public CharBuffer directByteBufferAsCharBufferViewSwap;
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public CharBuffer directByteBufferAsCharBufferViewSwapRO;
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@Setup
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public void setup() {
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charArray = new char[size / CARRIER_BYTE_WIDTH];
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// explicitly allocated heap carrier buffer
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heapCharBuffer = CharBuffer.allocate(size / CARRIER_BYTE_WIDTH);
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heapCharBufferRO = CharBuffer.allocate(size / CARRIER_BYTE_WIDTH).asReadOnlyBuffer();
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// ByteBuffer views
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heapByteBufferAsCharBufferView = ByteBuffer.allocate(size).order(nativeOrder()).asCharBuffer();
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heapByteBufferAsCharBufferViewRO = ByteBuffer.allocate(size).order(nativeOrder()).asCharBuffer().asReadOnlyBuffer();
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directByteBufferAsCharBufferView = ByteBuffer.allocateDirect(size).order(nativeOrder()).asCharBuffer();
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directByteBufferAsCharBufferViewRO = ByteBuffer.allocateDirect(size).order(nativeOrder()).asCharBuffer().asReadOnlyBuffer();
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// endianness swapped
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ByteOrder nonNativeOrder = nativeOrder() == BIG_ENDIAN ? LITTLE_ENDIAN : BIG_ENDIAN;
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heapByteBufferAsCharBufferViewSwap = ByteBuffer.allocate(size).order(nonNativeOrder).asCharBuffer();
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heapByteBufferAsCharBufferViewSwapRO = ByteBuffer.allocate(size).order(nonNativeOrder).asCharBuffer().asReadOnlyBuffer();
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directByteBufferAsCharBufferViewSwap = ByteBuffer.allocateDirect(size).order(nonNativeOrder).asCharBuffer();
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directByteBufferAsCharBufferViewSwapRO = ByteBuffer.allocateDirect(size).order(nonNativeOrder).asCharBuffer().asReadOnlyBuffer();
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}
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// ---------------- HELPER METHODS
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private char innerLoopGetChar(CharBuffer buf) {
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char 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 innerLoopPutChar(CharBuffer buf) {
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for (int i = 0; i < buf.capacity(); i++) {
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buf.put(i, charValue);
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}
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}
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// -- Heap___
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@Benchmark
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public char[] testHeapBulkPutChar() {
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heapCharBuffer.put(0, charArray);
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return charArray;
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}
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@Benchmark
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public char[] testHeapBulkGetChar() {
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heapCharBuffer.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public void testHeapLoopPutChar() {
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innerLoopPutChar(heapCharBuffer);
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}
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@Benchmark
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public char testHeapLoopGetChar() {
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return innerLoopGetChar(heapCharBuffer);
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}
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// -- Heap_View_Swap_RO
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@Benchmark
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public char[] testHeapBulkGetCharViewSwapRO() {
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heapByteBufferAsCharBufferViewSwapRO.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public char testHeapLoopGetCharViewSwapRO() {
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return innerLoopGetChar(heapByteBufferAsCharBufferViewSwapRO);
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}
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// -- Heap_View_Swap_
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@Benchmark
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public char[] testHeapBulkPutCharViewSwap() {
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heapByteBufferAsCharBufferViewSwap.put(0, charArray);
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return charArray;
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}
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@Benchmark
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public char[] testHeapBulkGetCharViewSwap() {
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heapByteBufferAsCharBufferViewSwap.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public void testHeapLoopPutCharViewSwap() {
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innerLoopPutChar(heapByteBufferAsCharBufferViewSwap);
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}
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@Benchmark
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public char testHeapLoopGetCharViewSwap() {
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return innerLoopGetChar(heapByteBufferAsCharBufferViewSwap);
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}
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// -- Heap_View__RO
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@Benchmark
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public char[] testHeapBulkGetCharViewRO() {
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heapByteBufferAsCharBufferViewRO.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public char testHeapLoopGetCharViewRO() {
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return innerLoopGetChar(heapByteBufferAsCharBufferViewRO);
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}
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// -- Heap_View__
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@Benchmark
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public char[] testHeapBulkPutCharView() {
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heapByteBufferAsCharBufferView.put(0, charArray);
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return charArray;
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}
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@Benchmark
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public char[] testHeapBulkGetCharView() {
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heapByteBufferAsCharBufferView.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public void testHeapLoopPutCharView() {
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innerLoopPutChar(heapByteBufferAsCharBufferView);
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}
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@Benchmark
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public char testHeapLoopGetCharView() {
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return innerLoopGetChar(heapByteBufferAsCharBufferView);
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}
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// -- Direct_View_Swap_RO
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@Benchmark
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public char[] testDirectBulkGetCharViewSwapRO() {
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directByteBufferAsCharBufferViewSwapRO.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public char testDirectLoopGetCharViewSwapRO() {
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return innerLoopGetChar(directByteBufferAsCharBufferViewSwapRO);
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}
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// -- Direct_View_Swap_
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@Benchmark
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public char[] testDirectBulkPutCharViewSwap() {
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directByteBufferAsCharBufferViewSwap.put(0, charArray);
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return charArray;
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}
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@Benchmark
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public char[] testDirectBulkGetCharViewSwap() {
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directByteBufferAsCharBufferViewSwap.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public void testDirectLoopPutCharViewSwap() {
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innerLoopPutChar(directByteBufferAsCharBufferViewSwap);
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}
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@Benchmark
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public char testDirectLoopGetCharViewSwap() {
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return innerLoopGetChar(directByteBufferAsCharBufferViewSwap);
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}
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// -- Direct_View__RO
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@Benchmark
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public char[] testDirectBulkGetCharViewRO() {
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directByteBufferAsCharBufferViewRO.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public char testDirectLoopGetCharViewRO() {
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return innerLoopGetChar(directByteBufferAsCharBufferViewRO);
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}
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// -- Direct_View__
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@Benchmark
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public char[] testDirectBulkPutCharView() {
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directByteBufferAsCharBufferView.put(0, charArray);
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return charArray;
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}
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@Benchmark
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public char[] testDirectBulkGetCharView() {
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directByteBufferAsCharBufferView.get(0, charArray);
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return charArray;
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}
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@Benchmark
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public void testDirectLoopPutCharView() {
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innerLoopPutChar(directByteBufferAsCharBufferView);
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}
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@Benchmark
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public char testDirectLoopGetCharView() {
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return innerLoopGetChar(directByteBufferAsCharBufferView);
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}
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}
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