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.lang.management.GarbageCollectorMXBean;
25 import java.util.List;
26 import java.util.ArrayList;
27 import jdk.test.lib.*;
28 import sun.management.ManagementFactoryHelper;
29
30 import static jdk.test.lib.Asserts.*;
31
32 /* @test TestMetaspacePerfCounters
33 * @bug 8014659
34 * @requires vm.gc=="null"
35 * @library /testlibrary
36 * @summary Tests that performance counters for metaspace and compressed class
37 * space exists and works.
38 * @modules java.base/jdk.internal.misc
39 * java.compiler
40 * java.management/sun.management
41 * jdk.jvmstat/sun.jvmstat.monitor
42 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
43 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
44 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
45 *
46 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
47 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
48 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
49 */
50 public class TestMetaspacePerfCounters {
51 public static Class fooClass = null;
52 private static final String[] counterNames = {"minCapacity", "maxCapacity", "capacity", "used"};
53 private static final List<GarbageCollectorMXBean> gcBeans = ManagementFactoryHelper.getGarbageCollectorMXBeans();
54
55 public static void main(String[] args) throws Exception {
56 String metaspace = "sun.gc.metaspace";
57 String ccs = "sun.gc.compressedclassspace";
58
59 checkPerfCounters(metaspace);
60
61 if (isUsingCompressedClassPointers()) {
62 checkPerfCounters(ccs);
63 checkUsedIncreasesWhenLoadingClass(ccs);
64 } else {
65 checkEmptyPerfCounters(ccs);
66 checkUsedIncreasesWhenLoadingClass(metaspace);
67 }
68 }
69
70 private static void checkPerfCounters(String ns) throws Exception {
71 long gcCountBefore;
72 long gcCountAfter;
73 long minCapacity;
74 long maxCapacity;
75 long capacity;
76 long used;
77
78 // The perf counter values are updated during GC and to be able to
79 // do the assertions below we need to ensure that the values are from
80 // the same GC cycle.
81 do {
82 gcCountBefore = currentGCCount();
83
84 minCapacity = getMinCapacity(ns);
85 maxCapacity = getMaxCapacity(ns);
86 capacity = getCapacity(ns);
87 used = getUsed(ns);
88
89 gcCountAfter = currentGCCount();
90 assertGTE(gcCountAfter, gcCountBefore);
91 } while(gcCountAfter > gcCountBefore);
92
93 assertGTE(minCapacity, 0L);
94 assertGTE(used, minCapacity);
95 assertGTE(capacity, used);
96 assertGTE(maxCapacity, capacity);
97 }
98
99 private static void checkEmptyPerfCounters(String ns) throws Exception {
100 for (PerfCounter counter : countersInNamespace(ns)) {
101 String msg = "Expected " + counter.getName() + " to equal 0";
102 assertEQ(counter.longValue(), 0L, msg);
103 }
104 }
105
106 private static void checkUsedIncreasesWhenLoadingClass(String ns) throws Exception {
107 // Need to ensure that used is up to date and that all unreachable
108 // classes are unloaded before doing this check.
109 System.gc();
110 long before = getUsed(ns);
111 fooClass = compileAndLoad("Foo", "public class Foo { }");
112 System.gc();
113 long after = getUsed(ns);
114
115 assertGT(after, before);
116 }
117
118 private static List<PerfCounter> countersInNamespace(String ns) throws Exception {
119 List<PerfCounter> counters = new ArrayList<>();
120 for (String name : counterNames) {
121 counters.add(PerfCounters.findByName(ns + "." + name));
122 }
123 return counters;
124 }
125
126 private static Class<?> compileAndLoad(String name, String source) throws Exception {
127 byte[] byteCode = InMemoryJavaCompiler.compile(name, source);
128 return ByteCodeLoader.load(name, byteCode);
129 }
130
131 private static boolean isUsingCompressedClassPointers() {
132 return Platform.is64bit() && InputArguments.contains("-XX:+UseCompressedClassPointers");
133 }
134
135 private static long getMinCapacity(String ns) throws Exception {
136 return PerfCounters.findByName(ns + ".minCapacity").longValue();
137 }
138
139 private static long getCapacity(String ns) throws Exception {
140 return PerfCounters.findByName(ns + ".capacity").longValue();
141 }
142
143 private static long getMaxCapacity(String ns) throws Exception {
144 return PerfCounters.findByName(ns + ".maxCapacity").longValue();
145 }
146
147 private static long getUsed(String ns) throws Exception {
148 return PerfCounters.findByName(ns + ".used").longValue();
149 }
150
151 private static long currentGCCount() {
152 long gcCount = 0;
153 for (GarbageCollectorMXBean bean : gcBeans) {
154 gcCount += bean.getCollectionCount();
155 }
156 return gcCount;
157 }
158 }