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comparison test/gc/g1/TestSummarizeRSetStatsThreads.java @ 12344:7ec10139bf37

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8025441: G1: assert "assert(thread < _num_vtimes) failed: just checking" fails when G1ConcRefinementThreads > ParallelGCThreads Summary: The initialization for the remembered set summary data structures used the wrong thread count, i.e. number of worker threads instead of number of refinement threads. Reviewed-by: brutisso
author tschatzl
date Mon, 30 Sep 2013 12:43:59 +0200
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children 05b726bce3e6
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12343:d55c004e1d4d 12344:7ec10139bf37
1 /*
2 * Copyright (c) 2013, 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 /*
25 * @test TestSummarizeRSetStatsThreads
26 * @bug 8025441
27 * @summary Ensure that various values of worker threads/concurrent
28 * refinement threads do not crash the VM.
29 * @key gc
30 * @library /testlibrary
31 */
32
33 import java.util.regex.Matcher;
34 import java.util.regex.Pattern;
35
36 import com.oracle.java.testlibrary.ProcessTools;
37 import com.oracle.java.testlibrary.OutputAnalyzer;
38
39 public class TestSummarizeRSetStatsThreads {
40
41 private static void runTest(int refinementThreads, int workerThreads) throws Exception {
42 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
43 "-XX:+UnlockDiagnosticVMOptions",
44 "-XX:+G1SummarizeRSetStats",
45 "-XX:G1ConcRefinementThreads=" + refinementThreads,
46 "-XX:ParallelGCThreads=" + workerThreads,
47 "-version");
48
49 OutputAnalyzer output = new OutputAnalyzer(pb.start());
50
51 // check output to contain the string "Concurrent RS threads times (s)" followed by
52 // the correct number of values in the next line.
53
54 // a zero in refinement thread numbers indicates that the value in ParallelGCThreads should be used.
55 // Additionally use at least one thread.
56 int expectedNumRefinementThreads = refinementThreads == 0 ? workerThreads : refinementThreads;
57 expectedNumRefinementThreads = Math.max(1, expectedNumRefinementThreads);
58 // create the pattern made up of n copies of a floating point number pattern
59 String numberPattern = String.format("%0" + expectedNumRefinementThreads + "d", 0)
60 .replace("0", "\\s+\\d+\\.\\d+");
61 String pattern = "Concurrent RS threads times \\(s\\)$" + numberPattern + "$";
62 Matcher m = Pattern.compile(pattern, Pattern.MULTILINE).matcher(output.getStdout());
63
64 if (!m.find()) {
65 throw new Exception("Could not find correct output for concurrent RS threads times in stdout," +
66 " should match the pattern \"" + pattern + "\", but stdout is \n" + output.getStdout());
67 }
68 output.shouldHaveExitValue(0);
69 }
70
71 public static void main(String[] args) throws Exception {
72 if (!TestSummarizeRSetStatsTools.testingG1GC()) {
73 return;
74 }
75 // different valid combinations of number of refinement and gc worker threads
76 runTest(0, 0);
77 runTest(0, 5);
78 runTest(5, 0);
79 runTest(10, 10);
80 runTest(1, 2);
81 runTest(4, 3);
82 }
83 }