1 /*
 2  * Copyright (c) 2013, 2019, Oracle and/or its affiliates. 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 package gc.g1;
25 
26 /*
27  * @test TestRemsetLoggingThreads
28  * @requires vm.gc.G1
29  * @bug 8025441 8145534
30  * @key gc
31  * @library /test/lib
32  * @modules java.base/jdk.internal.misc
33  *          java.management/sun.management
34  * @summary Ensure that various values of worker threads/concurrent
35  * refinement threads do not crash the VM.
36  * @run main gc.g1.TestRemsetLoggingThreads
37  */
38 
39 import java.util.regex.Matcher;
40 import java.util.regex.Pattern;
41 
42 import jdk.test.lib.process.OutputAnalyzer;
43 import jdk.test.lib.process.ProcessTools;
44 
45 public class TestRemsetLoggingThreads {
46 
47   private static void runTest(int refinementThreads, int workerThreads) throws Exception {
48     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
49                                                               "-XX:+UnlockDiagnosticVMOptions",
50                                                               "-Xlog:gc+remset+exit=trace",
51                                                               "-XX:G1ConcRefinementThreads=" + refinementThreads,
52                                                               "-XX:ParallelGCThreads=" + workerThreads,
53                                                               "-version");
54 
55     OutputAnalyzer output = new OutputAnalyzer(pb.start());
56 
57     String pattern = "Concurrent RS threads times \\(s\\)$";
58     Matcher m = Pattern.compile(pattern, Pattern.MULTILINE).matcher(output.getStdout());
59 
60     if (!m.find()) {
61       throw new Exception("Could not find correct output for concurrent RS threads times in stdout," +
62         " should match the pattern \"" + pattern + "\", but stdout is \n" + output.getStdout());
63     }
64     output.shouldHaveExitValue(0);
65   }
66 
67   public static void main(String[] args) throws Exception {
68     // different valid combinations of number of refinement and gc worker threads
69     runTest(1, 1);
70     runTest(1, 5);
71     runTest(5, 1);
72     runTest(10, 10);
73     runTest(1, 2);
74     runTest(4, 3);
75   }
76 }