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/*
* Copyright (c) 2013, 2014, 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.
*/
import java.util.List;
import java.util.ArrayList;
import com.oracle.java.testlibrary.*;
import static com.oracle.java.testlibrary.Asserts.*;
/* @test TestMetaspacePerfCounters
* @bug 8014659
* @requires vm.gc=="null"
* @library /testlibrary
* @summary Tests that performance counters for metaspace and compressed class
* space exists and works.
*
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
*
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
*/
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 {
long minCapacity = getMinCapacity(ns);
long maxCapacity = getMaxCapacity(ns);
long capacity = getCapacity(ns);
long used = getUsed(ns);
assertGTE(minCapacity, 0L);
assertGTE(used, minCapacity);
assertGTE(capacity, used);
assertGTE(maxCapacity, 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 {
long before = getUsed(ns);
fooClass = compileAndLoad("Foo", "public class Foo { }");
System.gc();
long after = getUsed(ns);
assertGT(after, before);
}
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");
}
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();
}
}
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