/*
* 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
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* 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<PerfCounter> countersInNamespace(String ns) throws Exception {
List<PerfCounter> 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");
}
}