1 /*
2 * Copyright (c) 2017, 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 * @summary Test Shenandoah GC uses concurrent/parallel threads correctly
28 * @requires vm.gc.Shenandoah
29 *
30 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
31 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
32 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
33 * -Dtarget=1000
34 * TestGCThreadGroups
35 */
36
37 /**
38 * @test id=default
39 * @summary Test Shenandoah GC uses concurrent/parallel threads correctly
40 * @requires vm.gc.Shenandoah
41 *
42 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
43 * -XX:+UseShenandoahGC
44 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
45 * -Dtarget=1000
46 * TestGCThreadGroups
47 *
48 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
49 * -XX:+UseShenandoahGC
50 * -XX:-UseDynamicNumberOfGCThreads
51 * -Dtarget=1000
52 * TestGCThreadGroups
53 *
54 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
55 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
56 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
57 * -Dtarget=1000
58 * TestGCThreadGroups
59 *
60 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
61 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
62 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
63 * -Dtarget=1000
64 * TestGCThreadGroups
65 *
66 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
67 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
68 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
69 * -Dtarget=100
70 * TestGCThreadGroups
71 *
72 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
73 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
74 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
75 * -Dtarget=100
76 * TestGCThreadGroups
77 */
78
79 public class TestGCThreadGroups {
80
81 static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation, around 1K cycles to handle
82 static final long STRIDE = 100_000;
83
84 static volatile Object sink;
85
86 public static void main(String[] args) throws Exception {
87 long count = TARGET_MB * 1024 * 1024 / 16;
88 for (long c = 0; c < count; c += STRIDE) {
89 for (long s = 0; s < STRIDE; s++) {
90 sink = new Object();
91 }
92 Thread.sleep(1);
93 }
94 }
95
96 }