Mercurial > jdk8-mips64-public > hotspot / changeset

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/test/gc/7168848/HumongousAlloc.java	Mon May 21 14:59:59 2012 +0200
     1.3 @@ -0,0 +1,74 @@
     1.4 +/*
     1.5 + * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.23 + * or visit www.oracle.com if you need additional information or have any
    1.24 + * questions.
    1.25 + */
    1.26 +
    1.27 +/*
    1.28 + * @test Humongous.java
    1.29 + * @bug 7168848
    1.30 + * @summary G1: humongous object allocations should initiate marking cycles when necessary
    1.31 + * @run main/othervm -Xms100m -Xmx100m -XX:+PrintGC -XX:G1HeapRegionSize=1m -XX:+UseG1GC  HumongousAlloc
    1.32 + *
    1.33 + */
    1.34 +import java.lang.management.GarbageCollectorMXBean;
    1.35 +import java.lang.management.ManagementFactory;
    1.36 +import java.util.List;
    1.37 +
    1.38 +public class HumongousAlloc {
    1.39 +
    1.40 +    public static byte[] dummy;
    1.41 +    private static int sleepFreq = 40;
    1.42 +    private static int sleepTime = 1000;
    1.43 +    private static double size = 0.75;
    1.44 +    private static int iterations = 50;
    1.45 +    private static int MB = 1024 * 1024;
    1.46 +
    1.47 +    public static void allocate(int size, int sleepTime, int sleepFreq) throws InterruptedException {
    1.48 +        System.out.println("Will allocate objects of size: " + size
    1.49 +                + " bytes and sleep for " + sleepTime
    1.50 +                + " ms after every " + sleepFreq + "th allocation.");
    1.51 +        int count = 0;
    1.52 +        while (count < iterations) {
    1.53 +            for (int i = 0; i < sleepFreq; i++) {
    1.54 +                dummy = new byte[size - 16];
    1.55 +            }
    1.56 +            Thread.sleep(sleepTime);
    1.57 +            count++;
    1.58 +        }
    1.59 +    }
    1.60 +
    1.61 +    public static void main(String[] args) throws InterruptedException {
    1.62 +        allocate((int) (size * MB), sleepTime, sleepFreq);
    1.63 +        List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans();
    1.64 +        for (GarbageCollectorMXBean collector : collectors) {
    1.65 +            if (collector.getName().contains("G1 Old")) {
    1.66 +               long count = collector.getCollectionCount();
    1.67 +                if (count > 0) {
    1.68 +                    throw new RuntimeException("Failed: FullGCs should not have happened. The number of FullGC run is " + count);
    1.69 +                }
    1.70 +                else {
    1.71 +                    System.out.println("Passed.");
    1.72 +                }
    1.73 +            }
    1.74 +        }
    1.75 +    }
    1.76 +}
    1.77 +