1 /*
   2  * Copyright (c) 2013, 2014, 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  * @requires vm.gc=="null"
  33  * @library /testlibrary
  34  * @build com.oracle.java.testlibrary.*
  35  * @summary Tests that performance counters for metaspace and compressed class
  36  *          space exists and works.
  37  *
  38  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
  39  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
  40  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
  41  *
  42  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
  43  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
  44  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
  45  */
  46 public class TestMetaspacePerfCounters {
  47     public static Class fooClass = null;
  48     private static final String[] counterNames = {"minCapacity", "maxCapacity", "capacity", "used"};
  49 
  50     public static void main(String[] args) throws Exception {
  51         String metaspace = "sun.gc.metaspace";
  52         String ccs = "sun.gc.compressedclassspace";
  53 
  54         checkPerfCounters(metaspace);
  55 
  56         if (isUsingCompressedClassPointers()) {
  57             checkPerfCounters(ccs);
  58             checkUsedIncreasesWhenLoadingClass(ccs);
  59         } else {
  60             checkEmptyPerfCounters(ccs);
  61             checkUsedIncreasesWhenLoadingClass(metaspace);
  62         }
  63     }
  64 
  65     private static void checkPerfCounters(String ns) throws Exception {
  66         long minCapacity = getMinCapacity(ns);
  67         long maxCapacity = getMaxCapacity(ns);
  68         long capacity = getCapacity(ns);
  69         long used = getUsed(ns);
  70 
  71         assertGTE(minCapacity, 0L);
  72         assertGTE(used, minCapacity);
  73         assertGTE(capacity, used);
  74         assertGTE(maxCapacity, capacity);
  75     }
  76 
  77     private static void checkEmptyPerfCounters(String ns) throws Exception {
  78         for (PerfCounter counter : countersInNamespace(ns)) {
  79             String msg = "Expected " + counter.getName() + " to equal 0";
  80             assertEQ(counter.longValue(), 0L, msg);
  81         }
  82     }
  83 
  84     private static void checkUsedIncreasesWhenLoadingClass(String ns) throws Exception {
  85         long before = getUsed(ns);
  86         fooClass = compileAndLoad("Foo", "public class Foo { }");
  87         System.gc();
  88         long after = getUsed(ns);
  89 
  90         assertGT(after, before);
  91     }
  92 
  93     private static List<PerfCounter> countersInNamespace(String ns) throws Exception {
  94         List<PerfCounter> counters = new ArrayList<>();
  95         for (String name : counterNames) {
  96             counters.add(PerfCounters.findByName(ns + "." + name));
  97         }
  98         return counters;
  99     }
 100 
 101     private static Class<?> compileAndLoad(String name, String source) throws Exception {
 102         byte[] byteCode = InMemoryJavaCompiler.compile(name, source);
 103         return ByteCodeLoader.load(name, byteCode);
 104     }
 105 
 106     private static boolean isUsingCompressedClassPointers() {
 107         return Platform.is64bit() && InputArguments.contains("-XX:+UseCompressedClassPointers");
 108     }
 109 
 110     private static long getMinCapacity(String ns) throws Exception {
 111         return PerfCounters.findByName(ns + ".minCapacity").longValue();
 112     }
 113 
 114     private static long getCapacity(String ns) throws Exception {
 115         return PerfCounters.findByName(ns + ".capacity").longValue();
 116     }
 117 
 118     private static long getMaxCapacity(String ns) throws Exception {
 119         return PerfCounters.findByName(ns + ".maxCapacity").longValue();
 120     }
 121 
 122     private static long getUsed(String ns) throws Exception {
 123         return PerfCounters.findByName(ns + ".used").longValue();
 124     }
 125 }