/* * Copyright (c) 2007, 2018, 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 vm.gc.compact; import java.util.*; import java.util.concurrent.atomic.AtomicInteger; import nsk.share.test.*; import nsk.share.gc.*; import nsk.share.gc.gp.*; /** * Test garbage collector compaction. * * The test starts several threads which create objects using * given garbage producer until OOM. The references are kept * in an array. The references to even elements are cleared * and objects of larger size are created until OOM. The garbage * collector will have to compact free space to free memory for * new objects. * * The size of the second half of created objects could be set explictly. * * This process is repeated. */ public class Compact extends ThreadedGCTest implements GarbageProducerAware, GarbageProducer1Aware, MemoryStrategyAware { private GarbageProducer garbageProducer; private GarbageProducer garbageProducer1; private MemoryStrategy memoryStrategy; private long size; private long size2; private static long customSize = 0; static AtomicInteger allocations = new AtomicInteger(); private class Worker implements Runnable { private List bricks; private ExecutionController stresser; public void run() { if (stresser == null) { stresser = getExecutionController(); } try { bricks = new ArrayList(); while (stresser.continueExecution()) { bricks.add(garbageProducer.create(size)); } } catch (OutOfMemoryError e) { } if (bricks == null) { return; } int count = bricks.size(); for (int i = 0; stresser.continueExecution() && i < count; i += 2) { bricks.set(i, null); } try { for (int i = 0; stresser.continueExecution() && i < count; i += 2) { bricks.set(i, garbageProducer1.create(size2)); allocations.incrementAndGet(); } } catch (OutOfMemoryError e) { } bricks = null; } } public Runnable createRunnable(int i) { return new Worker(); } public void run() { size = memoryStrategy.getSize(runParams.getTestMemory()); size2 = customSize == 0 ? size2 = size * 2 : customSize; super.run(); } public final void setGarbageProducer(GarbageProducer garbageProducer) { this.garbageProducer = garbageProducer; } public final void setGarbageProducer1(GarbageProducer garbageProducer1) { this.garbageProducer1 = garbageProducer1; } public final void setMemoryStrategy(MemoryStrategy memoryStrategy) { this.memoryStrategy = memoryStrategy; } static void setHumongousSizeFromParams(String[] args) { for (int i = 0; i < args.length; ++i) { if (args[i].equals("-size2")) { customSize = Long.parseLong(args[i + 1]); return; } } } public static void main(String[] args) { setHumongousSizeFromParams(args); GC.runTest(new Compact(), args); } }