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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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102
test/micro/org/openjdk/bench/java/io/RandomAccessWrite.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.io;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Level;
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 org.openjdk.jmh.annotations.TearDown;
/**
* Tests the overheads of I/O API.
* This test is known to depend heavily on disk subsystem performance.
*/
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Thread)
public class RandomAccessWrite {
@Param("1000000")
private int fileSize;
private File f;
private RandomAccessFile raf;
private long offset;
private int deltaIndex;
private int[] deltas;
@Setup(Level.Trial)
public void beforeRun() throws IOException {
f = File.createTempFile("RandomAccessBench", ".bin");
try (FileOutputStream fos = new FileOutputStream(f)) {
for (int i = 0; i < fileSize; i++) {
fos.write((byte) i);
}
}
deltas = new int[]{1, 2, 3, 5, 7, 11, 13, 17, 19, 23};
}
@TearDown(Level.Trial)
public void afterRun() throws IOException {
f.delete();
}
@Setup(Level.Iteration)
public void beforeIteration() throws IOException {
raf = new RandomAccessFile(f, "rw");
offset = 0;
deltaIndex = 0;
}
@TearDown(Level.Iteration)
public void afterIteration() throws IOException {
raf.close();
}
@Benchmark
public void test() throws IOException {
offset = offset + deltas[deltaIndex];
if (offset >= fileSize) {
offset = 0;
}
deltaIndex++;
if (deltaIndex >= deltas.length) {
deltaIndex = 0;
}
raf.seek(offset);
raf.write((byte) offset);
}
}