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annotate test/gc/7168848/HumongousAlloc.java @ 7531:3417a9177425
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author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 23 Jan 2013 16:39:56 +0100 |
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1 /* |
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /* |
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25 * @test Humongous.java |
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26 * @bug 7168848 |
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27 * @summary G1: humongous object allocations should initiate marking cycles when necessary |
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28 * @run main/othervm -Xms100m -Xmx100m -XX:+PrintGC -XX:G1HeapRegionSize=1m -XX:+UseG1GC HumongousAlloc |
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29 * |
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30 */ |
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31 import java.lang.management.GarbageCollectorMXBean; |
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32 import java.lang.management.ManagementFactory; |
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33 import java.util.List; |
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34 |
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35 public class HumongousAlloc { |
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36 |
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37 public static byte[] dummy; |
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38 private static int sleepFreq = 40; |
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39 private static int sleepTime = 1000; |
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40 private static double size = 0.75; |
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41 private static int iterations = 50; |
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42 private static int MB = 1024 * 1024; |
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43 |
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44 public static void allocate(int size, int sleepTime, int sleepFreq) throws InterruptedException { |
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45 System.out.println("Will allocate objects of size: " + size |
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46 + " bytes and sleep for " + sleepTime |
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47 + " ms after every " + sleepFreq + "th allocation."); |
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48 int count = 0; |
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49 while (count < iterations) { |
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50 for (int i = 0; i < sleepFreq; i++) { |
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51 dummy = new byte[size - 16]; |
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52 } |
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53 Thread.sleep(sleepTime); |
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54 count++; |
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55 } |
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56 } |
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57 |
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58 public static void main(String[] args) throws InterruptedException { |
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59 allocate((int) (size * MB), sleepTime, sleepFreq); |
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60 List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans(); |
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61 for (GarbageCollectorMXBean collector : collectors) { |
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62 if (collector.getName().contains("G1 Old")) { |
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63 long count = collector.getCollectionCount(); |
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64 if (count > 0) { |
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65 throw new RuntimeException("Failed: FullGCs should not have happened. The number of FullGC run is " + count); |
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66 } |
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67 else { |
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68 System.out.println("Passed."); |
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69 } |
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70 } |
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71 } |
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72 } |
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73 } |
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74 |