1 /*
2 * Copyright (c) 2017, 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 id=passive
27 * @requires vm.gc.Shenandoah
28 *
29 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahRegionSampling
30 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
31 * -XX:+ShenandoahDegeneratedGC
32 * TestRegionSampling
33 *
34 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahRegionSampling
35 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
36 * -XX:-ShenandoahDegeneratedGC
37 * TestRegionSampling
38 */
39
40 /*
41 * @test id=adaptive
42 * @requires vm.gc.Shenandoah
43 *
44 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahRegionSampling
45 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
46 * TestRegionSampling
47 */
48
49 /*
50 * @test id=static
51 * @requires vm.gc.Shenandoah
52 *
53 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahRegionSampling
54 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
55 * TestRegionSampling
56 */
57
58 /*
59 * @test id=compact
60 * @requires vm.gc.Shenandoah
61 *
62 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahRegionSampling
63 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
64 * TestRegionSampling
65 */
66
67 /*
68 * @test id=aggressive
69 * @requires vm.gc.Shenandoah
70 *
71 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahRegionSampling
72 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
73 * TestRegionSampling
74 */
75
76 /*
77 * @test id=iu-aggressive
78 * @requires vm.gc.Shenandoah
79 *
80 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahRegionSampling
81 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive
82 * TestRegionSampling
83 */
84
85 /*
86 * @test id=iu
87 * @requires vm.gc.Shenandoah
88 *
89 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahRegionSampling
90 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
91 * TestRegionSampling
92 *
93 */
94
95 public class TestRegionSampling {
96
97 static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation
98
99 static volatile Object sink;
100
101 public static void main(String[] args) throws Exception {
102 long count = TARGET_MB * 1024 * 1024 / 16;
103 for (long c = 0; c < count; c++) {
104 sink = new Object();
105 }
106 }
107
108 }