818597ae4f
Added test that checks humongous object allocation path also check the heap occupancy and initiate a marking cycle when / if needed. Reviewed-by: brutisso, jwilhelm
75 lines
2.9 KiB
Java
75 lines
2.9 KiB
Java
/*
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* Copyright (c) 2012, 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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/*
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* @test Humongous.java
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* @bug 7168848
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* @summary G1: humongous object allocations should initiate marking cycles when necessary
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* @run main/othervm -Xms100m -Xmx100m -XX:+PrintGC -XX:G1HeapRegionSize=1m -XX:+UseG1GC HumongousAlloc
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*
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*/
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import java.lang.management.GarbageCollectorMXBean;
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import java.lang.management.ManagementFactory;
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import java.util.List;
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public class HumongousAlloc {
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public static byte[] dummy;
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private static int sleepFreq = 40;
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private static int sleepTime = 1000;
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private static double size = 0.75;
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private static int iterations = 50;
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private static int MB = 1024 * 1024;
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public static void allocate(int size, int sleepTime, int sleepFreq) throws InterruptedException {
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System.out.println("Will allocate objects of size: " + size
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+ " bytes and sleep for " + sleepTime
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+ " ms after every " + sleepFreq + "th allocation.");
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int count = 0;
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while (count < iterations) {
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for (int i = 0; i < sleepFreq; i++) {
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dummy = new byte[size - 16];
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}
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Thread.sleep(sleepTime);
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count++;
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}
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}
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public static void main(String[] args) throws InterruptedException {
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allocate((int) (size * MB), sleepTime, sleepFreq);
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List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans();
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for (GarbageCollectorMXBean collector : collectors) {
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if (collector.getName().contains("G1 Old")) {
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long count = collector.getCollectionCount();
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if (count > 0) {
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throw new RuntimeException("Failed: FullGCs should not have happened. The number of FullGC run is " + count);
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}
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else {
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System.out.println("Passed.");
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}
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}
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}
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}
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}
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