1 /*
2 * Copyright (c) 2020, Red Hat, Inc. All rights reserved.
3 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 /*
27 * @test id=passive
28 * @requires vm.gc.Shenandoah
29 * @library /test/lib
30 *
31 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
32 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
33 * -XX:+ShenandoahDegeneratedGC
34 * -Dtarget=10000
35 * TestDynamicSoftMaxHeapSize
36 *
37 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
38 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
39 * -XX:-ShenandoahDegeneratedGC
40 * -Dtarget=10000
41 * TestDynamicSoftMaxHeapSize
42 */
43
44 /*
45 * @test id=aggressive
46 * @requires vm.gc.Shenandoah
47 * @library /test/lib
48 *
49 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
50 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
51 * -Dtarget=1000
52 * TestDynamicSoftMaxHeapSize
53 */
54
55 /*
56 * @test id=adaptive
57 * @requires vm.gc.Shenandoah
58 * @library /test/lib
59 *
60 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
61 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
62 * -Dtarget=10000
63 * TestDynamicSoftMaxHeapSize
64 */
65
66 /*
67 * @test id=generational
68 * @requires vm.gc.Shenandoah
69 * @library /test/lib
70 *
71 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
72 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive -XX:ShenandoahGCMode=generational
73 * -Dtarget=10000
74 * TestDynamicSoftMaxHeapSize
75 */
76
77 /*
78 * @test id=static
79 * @requires vm.gc.Shenandoah
80 * @library /test/lib
81 *
82 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
83 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
84 * -Dtarget=10000
85 * TestDynamicSoftMaxHeapSize
86 */
87
88 /*
89 * @test id=compact
90 * @requires vm.gc.Shenandoah
91 * @library /test/lib
92 *
93 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
94 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
95 * -Dtarget=1000
96 * TestDynamicSoftMaxHeapSize
97 */
98
99 import java.util.Random;
100 import jdk.test.lib.Utils;
101 import jdk.test.lib.process.OutputAnalyzer;
102 import jdk.test.lib.process.ProcessTools;
103 import jdk.test.lib.dcmd.PidJcmdExecutor;
104
105 public class TestDynamicSoftMaxHeapSize {
106
107 static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation
108 static final long STRIDE = 10_000_000;
109
110 static volatile Object sink;
111
112 public static void main(String[] args) throws Exception {
113 long count = TARGET_MB * 1024 * 1024 / 16;
114 Random r = Utils.getRandomInstance();
115 PidJcmdExecutor jcmd = new PidJcmdExecutor();
116
117 for (long c = 0; c < count; c += STRIDE) {
118 // Sizes specifically include heaps below Xms and above Xmx to test saturation code.
119 jcmd.execute("VM.set_flag SoftMaxHeapSize " + r.nextInt(768*1024*1024), true);
120 for (long s = 0; s < STRIDE; s++) {
121 sink = new Object();
122 }
123 Thread.sleep(1);
124 }
125 }
126
127 }