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annotate test/gc/g1/TestHumongousAllocInitialMark.java @ 17524:89152779163c

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Merge with jdk8-b132
author Gilles Duboscq <duboscq@ssw.jku.at>
date Wed, 15 Oct 2014 11:59:32 +0200
parents 4ca6dc0799b6
children
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1 /*
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Gilles Duboscq <duboscq@ssw.jku.at>
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2 * Copyright (c) 2012, 2013, 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
9a344d88dc22 7168848: Add test to check that humongous object allocation path also checks the heap occupancy.
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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 TestHumongousAllocInitialMark
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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 * @library /testlibrary
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29 */
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30
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31 import com.oracle.java.testlibrary.*;
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32
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33 public class TestHumongousAllocInitialMark {
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34 private static final int heapSize = 200; // MB
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35 private static final int heapRegionSize = 1; // MB
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36 private static final int initiatingHeapOccupancyPercent = 50; // %
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37
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38 public static void main(String[] args) throws Exception {
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39 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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40 "-XX:+UseG1GC",
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41 "-Xms" + heapSize + "m",
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42 "-Xmx" + heapSize + "m",
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43 "-XX:G1HeapRegionSize=" + heapRegionSize + "m",
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44 "-XX:InitiatingHeapOccupancyPercent=" + initiatingHeapOccupancyPercent,
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45 "-XX:+PrintGC",
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46 HumongousObjectAllocator.class.getName());
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47
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48 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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49 output.shouldContain("GC pause (G1 Humongous Allocation) (young) (initial-mark)");
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50 output.shouldNotContain("Full GC");
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51 output.shouldHaveExitValue(0);
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52 }
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53
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54 static class HumongousObjectAllocator {
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55 private static byte[] dummy;
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56
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57 public static void main(String [] args) throws Exception {
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58 // Make object size 75% of region size
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59 final int humongousObjectSize =
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60 (int)(heapRegionSize * 1024 * 1024 * 0.75);
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61
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62 // Number of objects to allocate to go above IHOP
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63 final int humongousObjectAllocations =
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64 (int)((heapSize * initiatingHeapOccupancyPercent / 100.0) / heapRegionSize) + 1;
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65
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66 // Allocate
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67 for (int i = 1; i <= humongousObjectAllocations; i++) {
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68 System.out.println("Allocating humongous object " + i + "/" + humongousObjectAllocations +
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69 " of size " + humongousObjectSize + " bytes");
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70 dummy = new byte[humongousObjectSize];
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71 }
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72 }
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73 }
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74 }
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75