1 /*
2 * Copyright (c) 2013, 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 import java.util.List;
25 import java.util.ArrayList;
26
27 import jdk.test.lib.*;
28 import static jdk.test.lib.Asserts.*;
29
30 /* @test TestMetaspacePerfCounters
31 * @bug 8014659
32 * @requires vm.gc=="null"
33 * @library /testlibrary
34 * @summary Tests that performance counters for metaspace and compressed class
35 * space exists and works.
36 * @modules java.base/sun.misc
37 * java.compiler
38 * java.management
39 * jdk.jvmstat/sun.jvmstat.monitor
40 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
41 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
42 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
43 *
44 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
45 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
46 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
47 */
48 public class TestMetaspacePerfCounters {
49 public static Class fooClass = null;
50 private static final String[] counterNames = {"minCapacity", "maxCapacity", "capacity", "used"};
51
52 public static void main(String[] args) throws Exception {
53 String metaspace = "sun.gc.metaspace";
54 String ccs = "sun.gc.compressedclassspace";
55
56 checkPerfCounters(metaspace);
57
58 if (isUsingCompressedClassPointers()) {
59 checkPerfCounters(ccs);
60 checkUsedIncreasesWhenLoadingClass(ccs);
61 } else {
62 checkEmptyPerfCounters(ccs);
63 checkUsedIncreasesWhenLoadingClass(metaspace);
64 }
65 }
66
67 private static void checkPerfCounters(String ns) throws Exception {
68 long minCapacity = getMinCapacity(ns);
69 long maxCapacity = getMaxCapacity(ns);
70 long capacity = getCapacity(ns);
71 long used = getUsed(ns);
72
73 assertGTE(minCapacity, 0L);
74 assertGTE(used, minCapacity);
75 assertGTE(capacity, used);
76 assertGTE(maxCapacity, capacity);
77 }
78
79 private static void checkEmptyPerfCounters(String ns) throws Exception {
80 for (PerfCounter counter : countersInNamespace(ns)) {
81 String msg = "Expected " + counter.getName() + " to equal 0";
82 assertEQ(counter.longValue(), 0L, msg);
83 }
84 }
85
86 private static void checkUsedIncreasesWhenLoadingClass(String ns) throws Exception {
87 // Need to ensure that used is up to date and that all unreachable
88 // classes are unloaded before doing this check.
89 System.gc();
90 long before = getUsed(ns);
91 fooClass = compileAndLoad("Foo", "public class Foo { }");
92 System.gc();
93 long after = getUsed(ns);
94
95 assertGT(after, before);
96 }
97
98 private static List<PerfCounter> countersInNamespace(String ns) throws Exception {
99 List<PerfCounter> counters = new ArrayList<>();
100 for (String name : counterNames) {
101 counters.add(PerfCounters.findByName(ns + "." + name));
102 }
103 return counters;
104 }
105
106 private static Class<?> compileAndLoad(String name, String source) throws Exception {
107 byte[] byteCode = InMemoryJavaCompiler.compile(name, source);
108 return ByteCodeLoader.load(name, byteCode);
109 }
110
111 private static boolean isUsingCompressedClassPointers() {
112 return Platform.is64bit() && InputArguments.contains("-XX:+UseCompressedClassPointers");
113 }
114
115 private static long getMinCapacity(String ns) throws Exception {
116 return PerfCounters.findByName(ns + ".minCapacity").longValue();
117 }
118
119 private static long getCapacity(String ns) throws Exception {
120 return PerfCounters.findByName(ns + ".capacity").longValue();
121 }
122
123 private static long getMaxCapacity(String ns) throws Exception {
124 return PerfCounters.findByName(ns + ".maxCapacity").longValue();
125 }
126
127 private static long getUsed(String ns) throws Exception {
128 return PerfCounters.findByName(ns + ".used").longValue();
129 }
130 }