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