150 lines
6.4 KiB
Plaintext
150 lines
6.4 KiB
Plaintext
/*
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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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#if[byte]
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* test(Direct|Heap)(Bulk|Loop)(Get|Put)(Byte|Char|Short|Int|Long|Float|Double)(Swap)?(RO)?
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#else[byte]
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* test(Direct|Heap)(Bulk|Loop)(Get|Put)$Type$(View)?(Swap)?(RO)?
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#end[byte]
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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.$Type$Buffers.testDirect.*"
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* Bulk only :- "org.openjdk.bench.java.nio.$Type$Buffers.test.*Bulk.*"
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* Loop Put Swapped Views: -
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* test(Direct|Heap)(Loop)(Put)$Type$(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 $Type$Buffers {
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static final int CARRIER_BYTE_WIDTH = $CarrierBW$;
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@Param({"16", "1024", "131072"})
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private int size;
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public $type$ $type$Value;
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#if[byte]
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public char charValue;
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public short shortValue;
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public int intValue;
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public long longValue;
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public float floatValue;
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public double doubleValue;
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#end[byte]
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public $type$[] $type$Array;
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public $Type$Buffer heap$Type$Buffer;
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public $Type$Buffer heap$Type$BufferRO;
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#if[byte]
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public ByteBuffer directByteBuffer;
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public ByteBuffer directByteBufferRO;
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public ByteBuffer heapByteBufferSwap;
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public ByteBuffer heapByteBufferSwapRO;
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public ByteBuffer directByteBufferSwap;
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public ByteBuffer directByteBufferSwapRO;
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#else[byte]
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public $Type$Buffer heapByteBufferAs$Type$BufferView;
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public $Type$Buffer heapByteBufferAs$Type$BufferViewRO;
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public $Type$Buffer heapByteBufferAs$Type$BufferViewSwap;
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public $Type$Buffer heapByteBufferAs$Type$BufferViewSwapRO;
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public $Type$Buffer directByteBufferAs$Type$BufferView;
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public $Type$Buffer directByteBufferAs$Type$BufferViewRO;
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public $Type$Buffer directByteBufferAs$Type$BufferViewSwap;
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public $Type$Buffer directByteBufferAs$Type$BufferViewSwapRO;
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#end[byte]
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@Setup
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public void setup() {
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$type$Array = new $type$[size / CARRIER_BYTE_WIDTH];
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// explicitly allocated heap carrier buffer
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heap$Type$Buffer = $Type$Buffer.allocate(size / CARRIER_BYTE_WIDTH);
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heap$Type$BufferRO = $Type$Buffer.allocate(size / CARRIER_BYTE_WIDTH).asReadOnlyBuffer();
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#if[byte]
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heapByteBufferSwap = ByteBuffer.allocate(size / CARRIER_BYTE_WIDTH).order(LITTLE_ENDIAN);
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heapByteBufferSwapRO = ByteBuffer.allocate(size / CARRIER_BYTE_WIDTH).order(LITTLE_ENDIAN).asReadOnlyBuffer();
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directByteBuffer = ByteBuffer.allocateDirect(size / CARRIER_BYTE_WIDTH);
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directByteBufferRO = ByteBuffer.allocateDirect(size / CARRIER_BYTE_WIDTH).asReadOnlyBuffer();
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directByteBufferSwap = ByteBuffer.allocateDirect(size / CARRIER_BYTE_WIDTH).order(LITTLE_ENDIAN);
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directByteBufferSwapRO = ByteBuffer.allocateDirect(size / CARRIER_BYTE_WIDTH).order(LITTLE_ENDIAN).asReadOnlyBuffer();
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#else[byte]
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// ByteBuffer views
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heapByteBufferAs$Type$BufferView = ByteBuffer.allocate(size).order(nativeOrder()).as$Type$Buffer();
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heapByteBufferAs$Type$BufferViewRO = ByteBuffer.allocate(size).order(nativeOrder()).as$Type$Buffer().asReadOnlyBuffer();
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directByteBufferAs$Type$BufferView = ByteBuffer.allocateDirect(size).order(nativeOrder()).as$Type$Buffer();
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directByteBufferAs$Type$BufferViewRO = ByteBuffer.allocateDirect(size).order(nativeOrder()).as$Type$Buffer().asReadOnlyBuffer();
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// endianness swapped
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ByteOrder nonNativeOrder = nativeOrder() == BIG_ENDIAN ? LITTLE_ENDIAN : BIG_ENDIAN;
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heapByteBufferAs$Type$BufferViewSwap = ByteBuffer.allocate(size).order(nonNativeOrder).as$Type$Buffer();
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heapByteBufferAs$Type$BufferViewSwapRO = ByteBuffer.allocate(size).order(nonNativeOrder).as$Type$Buffer().asReadOnlyBuffer();
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directByteBufferAs$Type$BufferViewSwap = ByteBuffer.allocateDirect(size).order(nonNativeOrder).as$Type$Buffer();
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directByteBufferAs$Type$BufferViewSwapRO = ByteBuffer.allocateDirect(size).order(nonNativeOrder).as$Type$Buffer().asReadOnlyBuffer();
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#end[byte]
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}
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#if[!byte]
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// ---------------- HELPER METHODS
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private $type$ innerLoopGet$Type$($Type$Buffer buf) {
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$type$ 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 innerLoopPut$Type$($Type$Buffer buf) {
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for (int i = 0; i < buf.capacity(); i++) {
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buf.put(i, $type$Value);
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}
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}
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#end[byte]
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