1 /*
   2  * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 /*
  25  * @test TestAllocHumongousFragment
  26  * @summary Make sure Shenandoah can recover from humongous allocation fragmentation
  27  * @key gc
  28  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  29  *
  30  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  31  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
  32  *      -XX:-ShenandoahDegeneratedGC -XX:+ShenandoahVerify
  33  *      TestAllocHumongousFragment
  34  *
  35  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  36  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
  37  *      -XX:+ShenandoahDegeneratedGC -XX:+ShenandoahVerify
  38  *      TestAllocHumongousFragment
  39  *
  40  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  41  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
  42  *      -XX:-ShenandoahDegeneratedGC
  43  *      TestAllocHumongousFragment
  44  *
  45  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  46  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
  47  *      -XX:+ShenandoahDegeneratedGC
  48  *      TestAllocHumongousFragment
  49  */
  50 
  51 /*
  52  * @test TestAllocHumongousFragment
  53  * @summary Make sure Shenandoah can recover from humongous allocation fragmentation
  54  * @key gc
  55  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  56  *
  57  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  58  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
  59  *      -XX:+ShenandoahOOMDuringEvacALot -XX:+ShenandoahVerify
  60  *      TestAllocHumongousFragment
  61  *
  62  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  63  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
  64  *      -XX:+ShenandoahAllocFailureALot -XX:+ShenandoahVerify
  65  *      TestAllocHumongousFragment
  66  *
  67  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  68  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
  69  *      -XX:+ShenandoahOOMDuringEvacALot
  70  *      TestAllocHumongousFragment
  71  *
  72  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  73  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
  74  *      -XX:+ShenandoahAllocFailureALot
  75  *      TestAllocHumongousFragment
  76  *
  77  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  78  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
  79  *      -XX:+ShenandoahVerify
  80  *      TestAllocHumongousFragment
  81  *
  82  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  83  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
  84  *      TestAllocHumongousFragment
  85  *
  86  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  87  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
  88  *      TestAllocHumongousFragment
  89  *
  90  * @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
  91  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
  92  *      TestAllocHumongousFragment
  93  */
  94 
  95 /*
  96  * @test TestAllocHumongousFragment
  97  * @summary Make sure Shenandoah can recover from humongous allocation fragmentation
  98  * @key gc
  99  * @requires vm.gc.Shenandoah & !vm.graal.enabled
 100  *
 101  * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
 102  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
 103  *      -XX:+ShenandoahOOMDuringEvacALot -XX:+ShenandoahVerify
 104  *      TestAllocHumongousFragment
 105  *
 106  * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
 107  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
 108  *      -XX:+ShenandoahAllocFailureALot -XX:+ShenandoahVerify
 109  *      TestAllocHumongousFragment
 110  *
 111  * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
 112  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
 113  *      -XX:+ShenandoahOOMDuringEvacALot
 114  *      TestAllocHumongousFragment
 115  *
 116  * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
 117  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
 118  *      -XX:+ShenandoahAllocFailureALot
 119  *      TestAllocHumongousFragment
 120  *
 121  * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
 122  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal
 123  *      -XX:+ShenandoahVerify
 124  *      TestAllocHumongousFragment
 125  *
 126  * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
 127  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal
 128  *      TestAllocHumongousFragment
 129  */
 130 
 131 import java.util.*;
 132 import java.util.concurrent.*;
 133 
 134 public class TestAllocHumongousFragment {
 135 
 136     static final long TARGET_MB = Long.getLong("target", 30_000); // 30 Gb allocations
 137     static final long LIVE_MB   = Long.getLong("occupancy", 700); // 700 Mb alive
 138 
 139     static volatile Object sink;
 140 
 141     static List<int[]> objects;
 142 
 143     public static void main(String[] args) throws Exception {
 144         final int min = 128 * 1024;
 145         final int max = 16 * 1024 * 1024;
 146         final long count = TARGET_MB * 1024 * 1024 / (16 + 4 * (min + (max - min) / 2));
 147 
 148         objects = new ArrayList<>();
 149         long current = 0;
 150 
 151         Random r = new Random();
 152         for (long c = 0; c < count; c++) {
 153             while (current > LIVE_MB * 1024 * 1024) {
 154                 int idx = ThreadLocalRandom.current().nextInt(objects.size());
 155                 int[] remove = objects.remove(idx);
 156                 current -= remove.length * 4 + 16;
 157             }
 158 
 159             int[] newObj = new int[min + r.nextInt(max - min)];
 160             current += newObj.length * 4 + 16;
 161             objects.add(newObj);
 162             sink = new Object();
 163 
 164             System.out.println("Allocated: " + (current / 1024 / 1024) + " Mb");
 165         }
 166     }
 167 
 168 }