1 /*
   2  * Copyright (c) 2012, 2013, 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 
  25 #include "precompiled.hpp"
  26 #include "memory/metaspaceCounters.hpp"
  27 #include "memory/resourceArea.hpp"
  28 #include "runtime/globals.hpp"
  29 #include "runtime/perfData.hpp"
  30 #include "utilities/exceptions.hpp"
  31 
  32 class MetaspacePerfCounters: public CHeapObj<mtInternal> {
  33   friend class VMStructs;
  34   PerfVariable*      _capacity;
  35   PerfVariable*      _used;
  36   PerfVariable*      _max_capacity;
  37 
  38   PerfVariable* create_variable(const char *ns, const char *name, size_t value, TRAPS) {
  39     const char *path = PerfDataManager::counter_name(ns, name);
  40     return PerfDataManager::create_variable(SUN_GC, path, PerfData::U_Bytes, value, THREAD);
  41   }
  42 
  43   void create_constant(const char *ns, const char *name, size_t value, TRAPS) {
  44     const char *path = PerfDataManager::counter_name(ns, name);
  45     PerfDataManager::create_constant(SUN_GC, path, PerfData::U_Bytes, value, THREAD);
  46   }
  47 
  48  public:
  49   MetaspacePerfCounters(const char* ns, size_t min_capacity, size_t curr_capacity, size_t max_capacity, size_t used) {
  50     EXCEPTION_MARK;
  51     ResourceMark rm;
  52 
  53     create_constant(ns, "minCapacity", min_capacity, THREAD);
  54     _capacity = create_variable(ns, "capacity", curr_capacity, THREAD);
  55     _max_capacity = create_variable(ns, "maxCapacity", max_capacity, THREAD);
  56     _used = create_variable(ns, "used", used, THREAD);
  57   }
  58 
  59   void update(size_t capacity, size_t max_capacity, size_t used) {
  60     _capacity->set_value(capacity);
  61     _max_capacity->set_value(max_capacity);
  62     _used->set_value(used);
  63   }
  64 };
  65 
  66 MetaspacePerfCounters* MetaspaceCounters::_perf_counters = NULL;
  67 
  68 size_t MetaspaceCounters::used() {
  69   return MetaspaceAux::used_bytes();
  70 }
  71 
  72 size_t MetaspaceCounters::capacity() {
  73   return MetaspaceAux::committed_bytes();
  74 }
  75 
  76 size_t MetaspaceCounters::max_capacity() {
  77   return MetaspaceAux::reserved_bytes();
  78 }
  79 
  80 void MetaspaceCounters::initialize_performance_counters() {
  81   if (UsePerfData) {
  82     assert(_perf_counters == NULL, "Should only be initialized once");
  83 
  84     size_t min_capacity = 0;
  85     _perf_counters = new MetaspacePerfCounters("metaspace", min_capacity,
  86                                                capacity(), max_capacity(), used());
  87   }
  88 }
  89 
  90 void MetaspaceCounters::update_performance_counters() {
  91   if (UsePerfData) {
  92     assert(_perf_counters != NULL, "Should be initialized");
  93 
  94     _perf_counters->update(capacity(), max_capacity(), used());
  95   }
  96 }
  97 
  98 MetaspacePerfCounters* CompressedClassSpaceCounters::_perf_counters = NULL;
  99 
 100 size_t CompressedClassSpaceCounters::used() {
 101   return MetaspaceAux::used_bytes(Metaspace::ClassType);
 102 }
 103 
 104 size_t CompressedClassSpaceCounters::capacity() {
 105   return MetaspaceAux::committed_bytes(Metaspace::ClassType);
 106 }
 107 
 108 size_t CompressedClassSpaceCounters::max_capacity() {
 109   return MetaspaceAux::reserved_bytes(Metaspace::ClassType);
 110 }
 111 
 112 void CompressedClassSpaceCounters::update_performance_counters() {
 113   if (UsePerfData && UseCompressedClassPointers) {
 114     assert(_perf_counters != NULL, "Should be initialized");
 115 
 116     _perf_counters->update(capacity(), max_capacity(), used());
 117   }
 118 }
 119 
 120 void CompressedClassSpaceCounters::initialize_performance_counters() {
 121   if (UsePerfData) {
 122     assert(_perf_counters == NULL, "Should only be initialized once");
 123     const char* ns = "compressedclassspace";
 124 
 125     if (UseCompressedClassPointers) {
 126       size_t min_capacity = 0;
 127       _perf_counters = new MetaspacePerfCounters(ns, min_capacity, capacity(),
 128                                                  max_capacity(), used());
 129     } else {
 130       _perf_counters = new MetaspacePerfCounters(ns, 0, 0, 0, 0);
 131     }
 132   }
 133 }