rev 48000 : [mq]: open.patch

   1 /*
   2  * Copyright (c) 2003, 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 #ifndef SHARE_VM_SERVICES_MEMORYMANAGER_HPP
  26 #define SHARE_VM_SERVICES_MEMORYMANAGER_HPP
  27 
  28 #include "gc/shared/gcCause.hpp"
  29 #include "memory/allocation.hpp"
  30 #include "oops/oopsHierarchy.hpp"
  31 #include "runtime/handles.hpp"
  32 #include "runtime/timer.hpp"
  33 #include "services/memoryUsage.hpp"
  34 
  35 // A memory manager is responsible for managing one or more memory pools.
  36 // The garbage collector is one type of memory managers responsible
  37 // for reclaiming memory occupied by unreachable objects.  A Java virtual
  38 // machine may have one or more memory managers.   It may
  39 // add or remove memory managers during execution.
  40 // A memory pool can be managed by more than one memory managers.
  41 
  42 class MemoryPool;
  43 class GCMemoryManager;
  44 class OopClosure;
  45 
  46 class MemoryManager : public CHeapObj<mtInternal> {
  47 private:
  48   enum {
  49     max_num_pools = 10
  50   };
  51 
  52   MemoryPool* _pools[max_num_pools];
  53   int         _num_pools;
  54 


  55 protected:
  56   volatile instanceOop _memory_mgr_obj;
  57 
  58 public:
  59   MemoryManager();
  60 
  61   int num_memory_pools() const           { return _num_pools; }
  62   MemoryPool* get_memory_pool(int index) {
  63     assert(index >= 0 && index < _num_pools, "Invalid index");
  64     return _pools[index];
  65   }
  66 
  67   void add_pool(MemoryPool* pool);
  68 
  69   bool is_manager(instanceHandle mh)     { return mh() == _memory_mgr_obj; }
  70 
  71   virtual instanceOop get_memory_manager_instance(TRAPS);
  72   virtual bool is_gc_memory_manager()    { return false; }
  73   virtual const char* name() = 0;

  74 
  75   // GC support
  76   void oops_do(OopClosure* f);
  77 
  78   // Static factory methods to get a memory manager of a specific type
  79   static MemoryManager*   get_code_cache_memory_manager();
  80   static MemoryManager*   get_metaspace_memory_manager();
  81   static GCMemoryManager* get_copy_memory_manager();
  82   static GCMemoryManager* get_msc_memory_manager();
  83   static GCMemoryManager* get_parnew_memory_manager();
  84   static GCMemoryManager* get_cms_memory_manager();
  85   static GCMemoryManager* get_psScavenge_memory_manager();
  86   static GCMemoryManager* get_psMarkSweep_memory_manager();
  87   static GCMemoryManager* get_g1YoungGen_memory_manager();
  88   static GCMemoryManager* get_g1OldGen_memory_manager();
  89 };
  90 
  91 class CodeCacheMemoryManager : public MemoryManager {
  92 private:
  93 public:
  94   CodeCacheMemoryManager() : MemoryManager() {}
  95 
  96   const char* name() { return "CodeCacheManager"; }
  97 };
  98 
  99 class MetaspaceMemoryManager : public MemoryManager {
 100 public:
 101   MetaspaceMemoryManager() : MemoryManager() {}
 102 
 103   const char* name() { return "Metaspace Manager"; }
 104 };
 105 
 106 class GCStatInfo : public ResourceObj {
 107 private:
 108   size_t _index;
 109   jlong  _start_time;
 110   jlong  _end_time;
 111 
 112   // We keep memory usage of all memory pools
 113   MemoryUsage* _before_gc_usage_array;
 114   MemoryUsage* _after_gc_usage_array;
 115   int          _usage_array_size;
 116 
 117   void set_gc_usage(int pool_index, MemoryUsage, bool before_gc);
 118 
 119 public:
 120   GCStatInfo(int num_pools);
 121   ~GCStatInfo();
 122 
 123   size_t gc_index()               { return _index; }
 124   jlong  start_time()             { return _start_time; }
 125   jlong  end_time()               { return _end_time; }
 126   int    usage_array_size()       { return _usage_array_size; }
 127   MemoryUsage before_gc_usage_for_pool(int pool_index) {
 128     assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
 129     return _before_gc_usage_array[pool_index];
 130   }
 131   MemoryUsage after_gc_usage_for_pool(int pool_index) {
 132     assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
 133     return _after_gc_usage_array[pool_index];
 134   }
 135 
 136   MemoryUsage* before_gc_usage_array() { return _before_gc_usage_array; }
 137   MemoryUsage* after_gc_usage_array()  { return _after_gc_usage_array; }
 138 
 139   void set_index(size_t index)    { _index = index; }
 140   void set_start_time(jlong time) { _start_time = time; }
 141   void set_end_time(jlong time)   { _end_time = time; }
 142   void set_before_gc_usage(int pool_index, MemoryUsage usage) {
 143     assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
 144     set_gc_usage(pool_index, usage, true /* before gc */);
 145   }
 146   void set_after_gc_usage(int pool_index, MemoryUsage usage) {
 147     assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
 148     set_gc_usage(pool_index, usage, false /* after gc */);
 149   }
 150 
 151   void clear();
 152 };
 153 
 154 class GCMemoryManager : public MemoryManager {
 155 private:
 156   // TODO: We should unify the GCCounter and GCMemoryManager statistic
 157   size_t       _num_collections;
 158   elapsedTimer _accumulated_timer;
 159   elapsedTimer _gc_timer;         // for measuring every GC duration
 160   GCStatInfo*  _last_gc_stat;
 161   Mutex*       _last_gc_lock;
 162   GCStatInfo*  _current_gc_stat;
 163   int          _num_gc_threads;
 164   volatile bool _notification_enabled;

 165 public:
 166   GCMemoryManager();
 167   ~GCMemoryManager();
 168 
 169   void   initialize_gc_stat_info();
 170 
 171   bool   is_gc_memory_manager()         { return true; }
 172   jlong  gc_time_ms()                   { return _accumulated_timer.milliseconds(); }
 173   size_t gc_count()                     { return _num_collections; }
 174   int    num_gc_threads()               { return _num_gc_threads; }
 175   void   set_num_gc_threads(int count)  { _num_gc_threads = count; }
 176 
 177   void   gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
 178                   bool recordAccumulatedGCTime);
 179   void   gc_end(bool recordPostGCUsage, bool recordAccumulatedGCTime,
 180                 bool recordGCEndTime, bool countCollection, GCCause::Cause cause);
 181 
 182   void        reset_gc_stat()   { _num_collections = 0; _accumulated_timer.reset(); }
 183 
 184   // Copy out _last_gc_stat to the given destination, returning
 185   // the collection count. Zero signifies no gc has taken place.
 186   size_t get_last_gc_stat(GCStatInfo* dest);
 187 
 188   void set_notification_enabled(bool enabled) { _notification_enabled = enabled; }
 189   bool is_notification_enabled() { return _notification_enabled; }
 190 };
 191 
 192 // These subclasses of GCMemoryManager are defined to include
 193 // GC-specific information.
 194 // TODO: Add GC-specific information
 195 class CopyMemoryManager : public GCMemoryManager {
 196 private:
 197 public:
 198   CopyMemoryManager() : GCMemoryManager() {}
 199 
 200   const char* name() { return "Copy"; }
 201 };
 202 
 203 class MSCMemoryManager : public GCMemoryManager {
 204 private:
 205 public:
 206   MSCMemoryManager() : GCMemoryManager() {}
 207 
 208   const char* name() { return "MarkSweepCompact"; }
 209 };
 210 
 211 class ParNewMemoryManager : public GCMemoryManager {
 212 private:
 213 public:
 214   ParNewMemoryManager() : GCMemoryManager() {}
 215 
 216   const char* name() { return "ParNew"; }
 217 };
 218 
 219 class CMSMemoryManager : public GCMemoryManager {
 220 private:
 221 public:
 222   CMSMemoryManager() : GCMemoryManager() {}
 223 
 224   const char* name() { return "ConcurrentMarkSweep";}
 225 };
 226 
 227 class PSScavengeMemoryManager : public GCMemoryManager {
 228 private:
 229 public:
 230   PSScavengeMemoryManager() : GCMemoryManager() {}
 231 
 232   const char* name() { return "PS Scavenge"; }
 233 };
 234 
 235 class PSMarkSweepMemoryManager : public GCMemoryManager {
 236 private:
 237 public:
 238   PSMarkSweepMemoryManager() : GCMemoryManager() {}
 239 
 240   const char* name() { return "PS MarkSweep"; }
 241 };
 242 
 243 class G1YoungGenMemoryManager : public GCMemoryManager {
 244 private:
 245 public:
 246   G1YoungGenMemoryManager() : GCMemoryManager() {}
 247 
 248   const char* name() { return "G1 Young Generation"; }
 249 };
 250 
 251 class G1OldGenMemoryManager : public GCMemoryManager {
 252 private:
 253 public:
 254   G1OldGenMemoryManager() : GCMemoryManager() {}
 255 
 256   const char* name() { return "G1 Old Generation"; }
 257 };
 258 
 259 #endif // SHARE_VM_SERVICES_MEMORYMANAGER_HPP
--- EOF ---