| /* |
| * Copyright (c) 2011, 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. |
| */ |
| |
| /* |
| * @test |
| * @key stress gc |
| * |
| * @summary converted from VM Testbase gc/gctests/AllocateWithoutOomTest. |
| * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, jrockit] |
| * VM Testbase readme: |
| * DESCRIPTION |
| * Small stress test that should be able to run for a specified |
| * time without hitting an OOM. |
| * |
| * COMMENTS |
| * This test was ported from JRockit test suite. |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm |
| * -XX:-UseGCOverheadLimit |
| * gc.gctests.AllocateWithoutOomTest.AllocateWithoutOomTest |
| */ |
| |
| package gc.gctests.AllocateWithoutOomTest; |
| |
| import java.util.ArrayList; |
| import java.util.Random; |
| import nsk.share.TestFailure; |
| import nsk.share.gc.GC; |
| import nsk.share.gc.GCTestBase; |
| import nsk.share.test.Stresser; |
| |
| /** |
| * Small stress test that should be able to run for a specified |
| * time without hitting an OOM. |
| */ |
| public class AllocateWithoutOomTest extends GCTestBase { |
| |
| /** |
| * Small stress test that allocates objects in a certain interval |
| * and runs for a specified time. It should not throw any OOM during |
| * the execution. |
| * |
| * @return success if the test runs for the specified time without |
| * and exceptions being thrown. |
| */ |
| @Override |
| public void run() { |
| int minSize; |
| int maxSize; |
| |
| |
| |
| minSize = 2048; |
| maxSize = 32768; |
| |
| |
| ArrayList placeholder = new ArrayList(); |
| long multiplier = maxSize - minSize; |
| Random rndGenerator = new Random(runParams.getSeed()); |
| |
| long memoryUpperLimit = runParams.getTestMemory(); |
| long memoryLowerLimit = runParams.getTestMemory() / 3; |
| long memoryAllocatedLowerLimit = memoryUpperLimit |
| - memoryLowerLimit; |
| |
| |
| long totalAllocatedMemory = 0; |
| long totalAllocatedObjects = 0; |
| int allocationSize = -1; |
| long roundCounter = 1; |
| |
| try { |
| Stresser stresser = new Stresser(runParams.getStressOptions()); |
| stresser.start(0); |
| while (stresser.continueExecution()) { |
| while (totalAllocatedMemory < memoryUpperLimit) { |
| allocationSize = ((int) (rndGenerator.nextDouble() |
| * multiplier)) + minSize; |
| byte[] tmp = new byte[allocationSize]; |
| totalAllocatedMemory += allocationSize; |
| totalAllocatedObjects++; |
| placeholder.add(tmp); |
| tmp = null; |
| } |
| |
| // NOTE: Start on index 1 to make sure we don't remove to many |
| // consecutive objects in the beginning |
| int indexToRemove = 1; |
| |
| while (totalAllocatedMemory > memoryAllocatedLowerLimit) { |
| // NOTE: Terminate if we only have zero objects left |
| if (placeholder.size() == 0) { |
| throw new TestFailure("No more objects to free, " |
| + "so we can't continue"); |
| } |
| |
| if (indexToRemove >= placeholder.size()) { |
| indexToRemove = (placeholder.size() == 1) ? 0 : 1; |
| } |
| |
| byte[] tmp = (byte[]) placeholder.remove(indexToRemove); |
| |
| totalAllocatedMemory -= tmp.length; |
| totalAllocatedObjects--; |
| |
| tmp = null; |
| // NOTE: Since we removed one object, we only need to |
| // increment index by 1 to move two steps. We want to |
| // remove every other object to create fragmentation |
| indexToRemove++; |
| } |
| |
| roundCounter++; |
| } |
| placeholder = null; |
| log.info("Passed. Completed " + roundCounter |
| + " rounds during the test"); |
| } catch (OutOfMemoryError oome) { |
| placeholder = null; |
| throw new TestFailure("OOM thrown when allocating an object of size " |
| + allocationSize, oome); |
| } finally { |
| placeholder = null; |
| } |
| } |
| |
| public static void main(String[] args) { |
| GC.runTest(new AllocateWithoutOomTest(), args); |
| } |
| } |