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 -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=passive -XX:-ShenandoahDegeneratedGC -XX:+ShenandoahVerify TestAllocHumongousFragment 31 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=passive -XX:+ShenandoahDegeneratedGC -XX:+ShenandoahVerify TestAllocHumongousFragment 32 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=passive -XX:-ShenandoahDegeneratedGC TestAllocHumongousFragment 33 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=passive -XX:+ShenandoahDegeneratedGC TestAllocHumongousFragment 34 * 35 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=aggressive -XX:+ShenandoahOOMDuringEvacALot -XX:+ShenandoahVerify TestAllocHumongousFragment 36 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=aggressive -XX:+ShenandoahAllocFailureALot -XX:+ShenandoahVerify TestAllocHumongousFragment 37 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=aggressive -XX:+ShenandoahOOMDuringEvacALot TestAllocHumongousFragment 38 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=aggressive -XX:+ShenandoahAllocFailureALot TestAllocHumongousFragment 39 * 40 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=adaptive -XX:+ShenandoahVerify TestAllocHumongousFragment 41 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=traversal -XX:+ShenandoahVerify TestAllocHumongousFragment 42 * 43 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=adaptive TestAllocHumongousFragment 44 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=static TestAllocHumongousFragment 45 * @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048 -XX:ShenandoahGCHeuristics=traversal TestAllocHumongousFragment 46 */ 47 48 import java.util.*; 49 import java.util.concurrent.*; 50 51 public class TestAllocHumongousFragment { 52 53 static final long TARGET_MB = Long.getLong("target", 30_000); // 30 Gb allocations 54 static final long LIVE_MB = Long.getLong("occupancy", 700); // 700 Mb alive 55 56 static volatile Object sink; 57 58 static List<int[]> objects; 59 60 public static void main(String[] args) throws Exception { 61 final int min = 128 * 1024; 62 final int max = 16 * 1024 * 1024; 63 final long count = TARGET_MB * 1024 * 1024 / (16 + 4 * (min + (max - min) / 2)); 64 65 objects = new ArrayList<>(); 66 long current = 0; 67 68 Random r = new Random(); 69 for (long c = 0; c < count; c++) { 70 while (current > LIVE_MB * 1024 * 1024) { 71 int idx = ThreadLocalRandom.current().nextInt(objects.size()); 72 int[] remove = objects.remove(idx); 73 current -= remove.length * 4 + 16; 74 } 75 76 int[] newObj = new int[min + r.nextInt(max - min)]; 77 current += newObj.length * 4 + 16; 78 objects.add(newObj); 79 sink = new Object(); 80 81 System.out.println("Allocated: " + (current / 1024 / 1024) + " Mb"); 82 } 83 } 84 85 }