1 /*
2 * Copyright (c) 2013, 2018, 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
28 import jdk.test.lib.ByteCodeLoader;
29 import jdk.test.lib.compiler.InMemoryJavaCompiler;
30 import jdk.test.lib.Platform;
31
32 import sun.management.ManagementFactoryHelper;
33
34 import static jdk.test.lib.Asserts.*;
35 import gc.testlibrary.PerfCounter;
36 import gc.testlibrary.PerfCounters;
37
38 /* @test TestMetaspacePerfCounters
39 * @bug 8014659
40 * @requires vm.gc=="null"
41 * @library /test/lib /
42 * @summary Tests that performance counters for metaspace and compressed class
43 * space exists and works.
44 * @modules java.base/jdk.internal.misc
45 * java.compiler
46 * java.management/sun.management
47 * jdk.internal.jvmstat/sun.jvmstat.monitor
48 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
49 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
50 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
51 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC TestMetaspacePerfCounters
52 *
53 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
54 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
55 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
56 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC TestMetaspacePerfCounters
57 */
58 public class TestMetaspacePerfCounters {
59 public static Class fooClass = null;
60 private static final String[] counterNames = {"minCapacity", "maxCapacity", "capacity", "used"};
61 private static final List<GarbageCollectorMXBean> gcBeans = ManagementFactoryHelper.getGarbageCollectorMXBeans();
62
63 public static void main(String[] args) throws Exception {
64 String metaspace = "sun.gc.metaspace";
65 String ccs = "sun.gc.compressedclassspace";
66
67 checkPerfCounters(metaspace);
68
69 if (isUsingCompressedClassPointers()) {
70 checkPerfCounters(ccs);
71 checkUsedIncreasesWhenLoadingClass(ccs);
72 } else {
73 checkEmptyPerfCounters(ccs);
74 checkUsedIncreasesWhenLoadingClass(metaspace);
75 }
76 }
77
78 private static void checkPerfCounters(String ns) throws Exception {
79 long gcCountBefore;
80 long gcCountAfter;
81 long minCapacity;
82 long maxCapacity;
83 long capacity;
84 long used;
85
86 // The perf counter values are updated during GC and to be able to
87 // do the assertions below we need to ensure that the values are from
88 // the same GC cycle.
89 do {
90 gcCountBefore = currentGCCount();
91
92 minCapacity = getMinCapacity(ns);
93 maxCapacity = getMaxCapacity(ns);
94 capacity = getCapacity(ns);
95 used = getUsed(ns);
96
97 gcCountAfter = currentGCCount();
98 assertGTE(gcCountAfter, gcCountBefore);
99 } while(gcCountAfter > gcCountBefore);
100
101 assertGTE(minCapacity, 0L);
102 assertGTE(used, minCapacity);
103 assertGTE(capacity, used);
104 assertGTE(maxCapacity, capacity);
105 }
106
107 private static void checkEmptyPerfCounters(String ns) throws Exception {
108 for (PerfCounter counter : countersInNamespace(ns)) {
109 String msg = "Expected " + counter.getName() + " to equal 0";
110 assertEQ(counter.longValue(), 0L, msg);
111 }
112 }
113
114 private static void checkUsedIncreasesWhenLoadingClass(String ns) throws Exception {
115 // Need to ensure that used is up to date and that all unreachable
116 // classes are unloaded before doing this check.
117 System.gc();
118 long before = getUsed(ns);
119 fooClass = compileAndLoad("Foo", "public class Foo { }");
120 System.gc();
121 long after = getUsed(ns);
122
123 assertGT(after, before);
124 }
125
126 private static List<PerfCounter> countersInNamespace(String ns) throws Exception {
127 List<PerfCounter> counters = new ArrayList<>();
128 for (String name : counterNames) {
129 counters.add(PerfCounters.findByName(ns + "." + name));
130 }
131 return counters;
132 }
133
134 private static Class<?> compileAndLoad(String name, String source) throws Exception {
135 byte[] byteCode = InMemoryJavaCompiler.compile(name, source);
136 return ByteCodeLoader.load(name, byteCode);
137 }
138
139 private static boolean isUsingCompressedClassPointers() {
140 return Platform.is64bit() && InputArguments.contains("-XX:+UseCompressedClassPointers");
141 }
142
143 private static long getMinCapacity(String ns) throws Exception {
144 return PerfCounters.findByName(ns + ".minCapacity").longValue();
145 }
146
147 private static long getCapacity(String ns) throws Exception {
148 return PerfCounters.findByName(ns + ".capacity").longValue();
149 }
150
151 private static long getMaxCapacity(String ns) throws Exception {
152 return PerfCounters.findByName(ns + ".maxCapacity").longValue();
153 }
154
155 private static long getUsed(String ns) throws Exception {
156 return PerfCounters.findByName(ns + ".used").longValue();
157 }
158
159 private static long currentGCCount() {
160 long gcCount = 0;
161 for (GarbageCollectorMXBean bean : gcBeans) {
162 gcCount += bean.getCollectionCount();
163 }
164 return gcCount;
165 }
166 }