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
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 }