77 lines
2.4 KiB
Java
77 lines
2.4 KiB
Java
/*
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* Copyright (c) 2010, 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 gc.lock;
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import jdk.test.whitebox.WhiteBox;
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import nsk.share.runner.*;
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import nsk.share.gc.*;
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import nsk.share.gc.gp.GarbageUtils;
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import nsk.share.gc.lock.*;
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import nsk.share.test.ExecutionController;
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/**
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* Test how GC is affected by locking.
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*
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* A number of threads is started. Each one locks and eats memory.
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*/
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public class LockerTest extends ThreadedGCTest implements LockersAware {
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private Lockers lockers;
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private long objectSize = 1000;
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private class Worker implements Runnable {
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byte[] rezerve = new byte[1024];
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private Locker locker = lockers.createLocker(rezerve);
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public Worker() {
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locker.enable();
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}
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public void run() {
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ExecutionController stresser = getExecutionController();
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// Use only 30% of the heap.
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final long testMemorySize = 3 * Runtime.getRuntime().maxMemory() / 10;
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while (stresser.continueExecution()) {
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locker.lock();
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GarbageUtils.engageGC(testMemorySize);
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locker.unlock();
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}
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}
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}
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protected Runnable createRunnable(int i) {
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return new Worker();
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}
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public void setLockers(Lockers lockers) {
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this.lockers = lockers;
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}
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public static void main(String[] args) {
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RunParams.getInstance().setRunMemDiagThread(false);
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GC.runTest(new LockerTest(), args);
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}
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}
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