Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * 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();

     }

 }