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 *
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 }
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1 /*
2 * Copyright (c) 2017, 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 *
60 *
61 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
62 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
63 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
64 * -Dtarget=1000
65 * TestGCThreadGroups
66 *
67 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
68 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
69 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
70 * -Dtarget=100
71 * TestGCThreadGroups
72 *
73 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
74 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
75 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
76 * -Dtarget=100
77 * TestGCThreadGroups
78 */
79
80 /**
81 * @test id=generational
82 * @summary Test Shenandoah GC uses concurrent/parallel threads correctly
83 * @requires vm.gc.Shenandoah
84 *
85 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
86 * -XX:+UseShenandoahGC
87 * -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
88 * -Dtarget=1000 -XX:ShenandoahGCMode=generational
89 * TestGCThreadGroups
90 *
91 * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
92 * -XX:+UseShenandoahGC
93 * -XX:-UseDynamicNumberOfGCThreads
94 * -Dtarget=1000 -XX:ShenandoahGCMode=generational
95 * TestGCThreadGroups
96 */
97
98 public class TestGCThreadGroups {
99
100 static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation, around 1K cycles to handle
101 static final long STRIDE = 100_000;
102
103 static volatile Object sink;
104
105 public static void main(String[] args) throws Exception {
106 long count = TARGET_MB * 1024 * 1024 / 16;
107 for (long c = 0; c < count; c += STRIDE) {
108 for (long s = 0; s < STRIDE; s++) {
109 sink = new Object();
110 }
111 Thread.sleep(1);
112 }
113 }
114
115 }
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