TestPLABOutput.java revision 9727:f944761a3ce3 
1/*
2 * Copyright (c) 2015, 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 TestPLABOutput
26 * @bug 8140585
27 * @summary Check that G1 does not report empty PLAB statistics in the first evacuation.
28 * @requires vm.gc=="G1" | vm.gc=="null"
29 * @key gc
30 * @library /testlibrary /../../test/lib
31 * @build sun.hotspot.WhiteBox
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * @run driver TestPLABOutput
34 */
35
36import sun.hotspot.WhiteBox;
37
38import java.util.regex.Matcher;
39import java.util.regex.Pattern;
40
41import jdk.test.lib.OutputAnalyzer;
42import jdk.test.lib.Platform;
43import jdk.test.lib.ProcessTools;
44
45import static jdk.test.lib.Asserts.*;
46
47public class TestPLABOutput {
48
49    public static void runTest() throws Exception {
50        final String[] arguments = {
51            "-Xbootclasspath/a:.",
52            "-XX:+UnlockExperimentalVMOptions",
53            "-XX:+UnlockDiagnosticVMOptions",
54            "-XX:+WhiteBoxAPI",
55            "-XX:+UseG1GC",
56            "-Xmx10M",
57            "-Xlog:gc+plab=debug",
58            GCTest.class.getName()
59            };
60
61        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(arguments);
62        OutputAnalyzer output = new OutputAnalyzer(pb.start());
63
64        output.shouldHaveExitValue(0);
65
66        System.out.println(output.getStdout());
67
68        String pattern = ".*GC\\(0\\) .*allocated = (\\d+).*";
69        Pattern r = Pattern.compile(pattern);
70        Matcher m = r.matcher(output.getStdout());
71
72        if (!m.find()) {
73            throw new RuntimeException("Could not find any PLAB statistics output");
74        }
75        int allocated = Integer.parseInt(m.group(1));
76        assertGT(allocated, 0, "Did not allocate any memory during test");
77    }
78
79    public static void main(String[] args) throws Exception {
80        runTest();
81    }
82
83    static class GCTest {
84        private static final WhiteBox WB = WhiteBox.getWhiteBox();
85
86        public static Object holder;
87
88        public static void main(String [] args) {
89            holder = new byte[100];
90            WB.youngGC();
91            System.out.println(holder);
92        }
93    }
94}
95
96