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8061281: Microbenchmark suite build support, directory layout and sample benchmarks

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8061282: Migrate jmh-jdk-microbenchmarks into the JDK

Co-authored-by: Magnus Ihse Bursie <magnus.ihse.bursie@oracle.com>
Co-authored-by: Erik Joelsson <erik.joelsson@oracle.com>
Co-authored-by: Staffan Friberg <sfriberg@kth.se>
Reviewed-by: ecaspole, mchung, erikj, ihse
This commit is contained in:
Claes Redestad 2018-11-16 23:39:51 +01:00
parent 14b7467279
commit 7a30c97753
247 changed files with 26097 additions and 13 deletions
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90
test/micro/org/openjdk/bench/java/nio/CharsetEncodeDecode.java Normal file
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/*
* Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package org.openjdk.bench.java.nio;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.util.concurrent.TimeUnit;
/**
* This benchmark tests the encode/decode loops on different Charsets. It was created from an adhoc benchmark addressing
* a performance issue which in the end boiled down to the encode/decode loops. This is the reason for the values on the
* char and byte arrays.
*/
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@State(Scope.Thread)
public class CharsetEncodeDecode {
private byte[] BYTES;
private char[] CHARS;
private CharsetEncoder encoder;
private CharsetDecoder decoder;
@Param({"BIG5", "ISO-8859-15", "ASCII", "UTF-16"})
private String type;
@Param("16384")
private int size;
@Setup
public void prepare() {
BYTES = new byte[size];
CHARS = new char[size];
for (int i = 0; i < size; ++i) {
int val = 48 + (i % 16);
BYTES[i] = (byte) val;
CHARS[i] = (char) val;
}
encoder = Charset.forName(type).newEncoder();
decoder = Charset.forName(type).newDecoder();
}
@Benchmark
public ByteBuffer encode() throws CharacterCodingException {
CharBuffer charBuffer = CharBuffer.wrap(CHARS);
return encoder.encode(charBuffer);
}
@Benchmark
public CharBuffer decode() throws CharacterCodingException {
ByteBuffer byteBuffer = ByteBuffer.wrap(BYTES);
return decoder.decode(byteBuffer);
}
}