1 /*
2 * Copyright (c) 2020, 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 id=passive
27 * @requires vm.gc.Shenandoah
28 * @library /test/lib
29 *
30 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
31 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
32 * -XX:+ShenandoahDegeneratedGC
33 * -Dtarget=10000
34 * TestDynamicSoftMaxHeapSize
35 *
36 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
37 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
38 * -XX:-ShenandoahDegeneratedGC
39 * -Dtarget=10000
40 * TestDynamicSoftMaxHeapSize
41 */
42
43 /*
44 * @test id=aggressive
45 * @requires vm.gc.Shenandoah
46 * @library /test/lib
47 *
48 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
49 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
50 * -Dtarget=1000
51 * TestDynamicSoftMaxHeapSize
52 */
53
54 /*
55 * @test id=adaptive
56 * @requires vm.gc.Shenandoah
57 * @library /test/lib
58 *
59 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
60 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
61 * -Dtarget=10000
62 * TestDynamicSoftMaxHeapSize
63 */
64
65 /*
66 * @test id=static
67 * @requires vm.gc.Shenandoah
68 * @library /test/lib
69 *
70 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
71 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
72 * -Dtarget=10000
73 * TestDynamicSoftMaxHeapSize
74 */
75
76 /*
77 * @test id=compact
78 * @requires vm.gc.Shenandoah
79 * @library /test/lib
80 *
81 * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
82 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
83 * -Dtarget=1000
84 * TestDynamicSoftMaxHeapSize
85 */
86
87 import java.util.Random;
88 import jdk.test.lib.Utils;
89 import jdk.test.lib.process.OutputAnalyzer;
90 import jdk.test.lib.process.ProcessTools;
91 import jdk.test.lib.dcmd.PidJcmdExecutor;
92
93 public class TestDynamicSoftMaxHeapSize {
94
95 static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation
96 static final long STRIDE = 10_000_000;
97
98 static volatile Object sink;
99
100 public static void main(String[] args) throws Exception {
101 long count = TARGET_MB * 1024 * 1024 / 16;
102 Random r = Utils.getRandomInstance();
103 PidJcmdExecutor jcmd = new PidJcmdExecutor();
104
105 for (long c = 0; c < count; c += STRIDE) {
106 // Sizes specifically include heaps below Xms and above Xmx to test saturation code.
107 jcmd.execute("VM.set_flag SoftMaxHeapSize " + r.nextInt(768*1024*1024), true);
108 for (long s = 0; s < STRIDE; s++) {
109 sink = new Object();
110 }
111 Thread.sleep(1);
112 }
113 }
114
115 }