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