/*
* Copyright (c) 1999, 2008, 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 bench.serial;
import bench.Benchmark;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
/**
* Benchmark for testing speed of reads/writes of repeated objects.
*/
public class RepeatObjs implements Benchmark {
static class Node implements Serializable {
}
/**
* Write and read repeated objects to/from a stream. The benchmark is run
* for a given number of batches. Within each batch, a set of objects
* is written to and read from the stream. The set of objects remains the
* same between batches (and the serialization streams are not reset) in
* order to test the speed of object -> wire handle lookup, and vice versa.
* Arguments: <# objects> <# cycles>
*/
public long run(String[] args) throws Exception {
int size = Integer.parseInt(args[0]);
int nbatches = Integer.parseInt(args[1]);
Node[] objs = genObjs(size);
StreamBuffer sbuf = new StreamBuffer();
ObjectOutputStream oout =
new ObjectOutputStream(sbuf.getOutputStream());
ObjectInputStream oin =
new ObjectInputStream(sbuf.getInputStream());
doReps(oout, oin, sbuf, objs, 1); // warmup
long start = System.currentTimeMillis();
doReps(oout, oin, sbuf, objs, nbatches);
return System.currentTimeMillis() - start;
}
/**
* Generate objects.
*/
Node[] genObjs(int nobjs) {
Node[] objs = new Node[nobjs];
for (int i = 0; i < nobjs; i++)
objs[i] = new Node();
return objs;
}
/**
* Run benchmark for given number of batches.
*/
void doReps(ObjectOutputStream oout, ObjectInputStream oin,
StreamBuffer sbuf, Node[] objs, int nbatches)
throws Exception
{
int nobjs = objs.length;
for (int i = 0; i < nbatches; i++) {
sbuf.reset();
for (int j = 0; j < nobjs; j++) {
oout.writeObject(objs[j]);
}
oout.flush();
for (int j = 0; j < nobjs; j++) {
oin.readObject();
}
}
}
}