/* * Copyright (c) 2013, 2022, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package gc.metaspace; import java.lang.invoke.VarHandle; import java.util.List; import java.util.ArrayList; import jdk.test.lib.ByteCodeLoader; import jdk.test.lib.compiler.InMemoryJavaCompiler; import jdk.test.lib.Platform; import sun.management.ManagementFactoryHelper; import static jdk.test.lib.Asserts.*; import gc.testlibrary.PerfCounter; import gc.testlibrary.PerfCounters; /* @test id=Serial-64 * @bug 8014659 * @requires vm.gc.Serial * @requires vm.bits == "64" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC gc.metaspace.TestMetaspacePerfCounters * @run main/othervm -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=Parallel-64 * @bug 8014659 * @requires vm.gc.Parallel * @requires vm.bits == "64" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC gc.metaspace.TestMetaspacePerfCounters * @run main/othervm -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=G1-64 * @bug 8014659 * @requires vm.gc.G1 * @requires vm.bits == "64" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC gc.metaspace.TestMetaspacePerfCounters * @run main/othervm -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=Shenandoah-64 * @bug 8014659 * @requires vm.gc.Shenandoah * @requires vm.bits == "64" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseShenandoahGC gc.metaspace.TestMetaspacePerfCounters * @run main/othervm -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseShenandoahGC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=Epsilon-64 * @bug 8014659 * @requires vm.gc.Epsilon * @requires vm.bits == "64" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseEpsilonGC gc.metaspace.TestMetaspacePerfCounters * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseEpsilonGC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=Serial-32 * @bug 8014659 * @requires vm.gc.Serial * @requires vm.bits == "32" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:+UsePerfData -XX:+UseSerialGC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=Parallel-32 * @bug 8014659 * @requires vm.gc.Parallel * @requires vm.bits == "32" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:+UsePerfData -XX:+UseParallelGC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=G1-32 * @bug 8014659 * @requires vm.gc.G1 * @requires vm.bits == "32" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:+UsePerfData -XX:+UseG1GC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=Shenandoah-32 * @bug 8014659 * @requires vm.gc.Shenandoah * @requires vm.bits == "32" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:+UsePerfData -XX:+UseShenandoahGC gc.metaspace.TestMetaspacePerfCounters */ /* @test id=Epsilon-32 * @bug 8014659 * @requires vm.gc.Epsilon * @requires vm.bits == "32" * @library /test/lib / * @summary Tests that performance counters for metaspace and compressed class * space exists and works. * @modules java.base/jdk.internal.misc * java.compiler * java.management/sun.management * jdk.internal.jvmstat/sun.jvmstat.monitor * @run main/othervm -XX:+UsePerfData -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC gc.metaspace.TestMetaspacePerfCounters */ class PerfCounterSnapshot { private static long getMinCapacity(String ns) throws Exception { return PerfCounters.findByName(ns + ".minCapacity").longValue(); } private static long getCapacity(String ns) throws Exception { return PerfCounters.findByName(ns + ".capacity").longValue(); } private static long getMaxCapacity(String ns) throws Exception { return PerfCounters.findByName(ns + ".maxCapacity").longValue(); } private static long getUsed(String ns) throws Exception { return PerfCounters.findByName(ns + ".used").longValue(); } public long minCapacity; public long maxCapacity; public long capacity; public long used; public void get(String ns) throws Exception { minCapacity = getMinCapacity(ns); maxCapacity = getMaxCapacity(ns); used = getUsed(ns); capacity = getCapacity(ns); } public boolean consistentWith(PerfCounterSnapshot other) { return (minCapacity == other.minCapacity) && (maxCapacity == other.maxCapacity) && (used == other.used) && (capacity == other.capacity); } } public class TestMetaspacePerfCounters { public static Class fooClass = null; private static final String[] counterNames = {"minCapacity", "maxCapacity", "capacity", "used"}; public static void main(String[] args) throws Exception { String metaspace = "sun.gc.metaspace"; String ccs = "sun.gc.compressedclassspace"; checkPerfCounters(metaspace); if (isUsingCompressedClassPointers()) { checkPerfCounters(ccs); checkUsedIncreasesWhenLoadingClass(ccs); } else { checkEmptyPerfCounters(ccs); checkUsedIncreasesWhenLoadingClass(metaspace); } } private static void checkPerfCounters(String ns) throws Exception { PerfCounterSnapshot snap1 = new PerfCounterSnapshot(); PerfCounterSnapshot snap2 = new PerfCounterSnapshot(); final int MaxAttempts = 10; for (int attempts = 0; ; attempts++) { snap1.get(ns); VarHandle.fullFence(); snap2.get(ns); if (snap1.consistentWith(snap2)) { // Got a consistent snapshot for examination. break; } else if (attempts == MaxAttempts) { throw new Exception("Failed to get stable reading of metaspace performance counters after " + attempts + " tries"); } } assertGTE(snap1.minCapacity, 0L); assertGTE(snap1.used, snap1.minCapacity); assertGTE(snap1.capacity, snap1.used); assertGTE(snap1.maxCapacity, snap1.capacity); } private static void checkEmptyPerfCounters(String ns) throws Exception { for (PerfCounter counter : countersInNamespace(ns)) { String msg = "Expected " + counter.getName() + " to equal 0"; assertEQ(counter.longValue(), 0L, msg); } } private static void checkUsedIncreasesWhenLoadingClass(String ns) throws Exception { // Need to ensure that used is up to date and that all unreachable // classes are unloaded before doing this check. System.gc(); PerfCounterSnapshot before = new PerfCounterSnapshot(); before.get(ns); fooClass = compileAndLoad("Foo", "public class Foo { }"); System.gc(); PerfCounterSnapshot after = new PerfCounterSnapshot(); after.get(ns); assertGT(after.used, before.used); } private static List countersInNamespace(String ns) throws Exception { List counters = new ArrayList<>(); for (String name : counterNames) { counters.add(PerfCounters.findByName(ns + "." + name)); } return counters; } private static Class compileAndLoad(String name, String source) throws Exception { byte[] byteCode = InMemoryJavaCompiler.compile(name, source); return ByteCodeLoader.load(name, byteCode); } private static boolean isUsingCompressedClassPointers() { return Platform.is64bit() && InputArguments.contains("-XX:+UseCompressedClassPointers"); } }