88 lines
2.7 KiB
Java
88 lines
2.7 KiB
Java
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/*
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* Copyright 1999 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/*
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*
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*/
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package bench.serial;
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import bench.Benchmark;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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/**
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* Benchmark for testing speed of long array reads/writes.
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*/
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public class LongArrays implements Benchmark {
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/**
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* Write and read long arrays to/from a stream. The benchmark is run in
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* batches, with each batch consisting of a fixed number of read/write
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* cycles. The ObjectOutputStream is reset after each batch of cycles has
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* completed.
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* Arguments: <array size> <# batches> <# cycles per batch>
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*/
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public long run(String[] args) throws Exception {
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int size = Integer.parseInt(args[0]);
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int nbatches = Integer.parseInt(args[1]);
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int ncycles = Integer.parseInt(args[2]);
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long[][] arrays = new long[ncycles][size];
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StreamBuffer sbuf = new StreamBuffer();
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ObjectOutputStream oout =
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new ObjectOutputStream(sbuf.getOutputStream());
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ObjectInputStream oin =
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new ObjectInputStream(sbuf.getInputStream());
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doReps(oout, oin, sbuf, arrays, 1); // warmup
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long start = System.currentTimeMillis();
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doReps(oout, oin, sbuf, arrays, nbatches);
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return System.currentTimeMillis() - start;
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}
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/**
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* Run benchmark for given number of batches, with given number of cycles
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* for each batch.
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*/
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void doReps(ObjectOutputStream oout, ObjectInputStream oin,
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StreamBuffer sbuf, long[][] arrays, int nbatches)
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throws Exception
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{
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int ncycles = arrays.length;
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for (int i = 0; i < nbatches; i++) {
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sbuf.reset();
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oout.reset();
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for (int j = 0; j < ncycles; j++) {
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oout.writeObject(arrays[j]);
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}
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oout.flush();
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for (int j = 0; j < ncycles; j++) {
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oin.readObject();
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}
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}
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}
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}
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