jdk8-mips64-public/hotspot: src/share/vm/services/memoryManager.hpp@f6f3eef8a521 (annotated)

src/share/vm/services/memoryManager.hpp@f6f3eef8a521 (annotated)

src/share/vm/services/memoryManager.hpp

Fri, 30 Jul 2010 22:43:50 +0100

author: kevinw
date: Fri, 30 Jul 2010 22:43:50 +0100
changeset 2058: f6f3eef8a521
parent 1907: c18cbe5936b8
child 2314: f95d63e2154a
permissions: -rw-r--r--

6581734: CMS Old Gen's collection usage is zero after GC which is incorrect
Summary: Management code enabled for use by a concurrent collector.
Reviewed-by: mchung, ysr

 /*
  * Copyright (c) 2003, 2005, 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.
  *
  */
 // A memory manager is responsible for managing one or more memory pools.
 // The garbage collector is one type of memory managers responsible
 // for reclaiming memory occupied by unreachable objects.  A Java virtual
 // machine may have one or more memory managers.   It may
 // add or remove memory managers during execution.
 // A memory pool can be managed by more than one memory managers.
 class MemoryPool;
 class GCMemoryManager;
 class OopClosure;
 class MemoryManager : public CHeapObj {
 private:
   enum {
     max_num_pools = 10
   };
   MemoryPool* _pools[max_num_pools];
   int         _num_pools;
 protected:
   volatile instanceOop _memory_mgr_obj;
 public:
   enum Name {
     Abstract,
     CodeCache,
     Copy,
     MarkSweepCompact,
     ParNew,
     ConcurrentMarkSweep,
     PSScavenge,
     PSMarkSweep,
     G1YoungGen,
     G1OldGen
   };
   MemoryManager();
   int num_memory_pools() const           { return _num_pools; }
   MemoryPool* get_memory_pool(int index) {
     assert(index >= 0 && index < _num_pools, "Invalid index");
     return _pools[index];
   }
   void add_pool(MemoryPool* pool);
   bool is_manager(instanceHandle mh)     { return mh() == _memory_mgr_obj; }
   virtual instanceOop get_memory_manager_instance(TRAPS);
   virtual MemoryManager::Name kind()     { return MemoryManager::Abstract; }
   virtual bool is_gc_memory_manager()    { return false; }
   virtual const char* name() = 0;
   // GC support
   void oops_do(OopClosure* f);
   // Static factory methods to get a memory manager of a specific type
   static MemoryManager*   get_code_cache_memory_manager();
   static GCMemoryManager* get_copy_memory_manager();
   static GCMemoryManager* get_msc_memory_manager();
   static GCMemoryManager* get_parnew_memory_manager();
   static GCMemoryManager* get_cms_memory_manager();
   static GCMemoryManager* get_psScavenge_memory_manager();
   static GCMemoryManager* get_psMarkSweep_memory_manager();
   static GCMemoryManager* get_g1YoungGen_memory_manager();
   static GCMemoryManager* get_g1OldGen_memory_manager();
 };
 class CodeCacheMemoryManager : public MemoryManager {
 private:
 public:
   CodeCacheMemoryManager() : MemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::CodeCache; }
   const char* name()         { return "CodeCacheManager"; }
 };
 class GCStatInfo : public CHeapObj {
 private:
   size_t _index;
   jlong  _start_time;
   jlong  _end_time;
   // We keep memory usage of all memory pools
   MemoryUsage* _before_gc_usage_array;
   MemoryUsage* _after_gc_usage_array;
   int          _usage_array_size;
   void set_gc_usage(int pool_index, MemoryUsage, bool before_gc);
 public:
   GCStatInfo(int num_pools);
   ~GCStatInfo();
   size_t gc_index()               { return _index; }
   jlong  start_time()             { return _start_time; }
   jlong  end_time()               { return _end_time; }
   int    usage_array_size()       { return _usage_array_size; }
   MemoryUsage before_gc_usage_for_pool(int pool_index) {
     assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
     return _before_gc_usage_array[pool_index];
   }
   MemoryUsage after_gc_usage_for_pool(int pool_index) {
     assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
     return _after_gc_usage_array[pool_index];
   }
   MemoryUsage* before_gc_usage_array() { return _before_gc_usage_array; }
   MemoryUsage* after_gc_usage_array()  { return _after_gc_usage_array; }
   void set_index(size_t index)    { _index = index; }
   void set_start_time(jlong time) { _start_time = time; }
   void set_end_time(jlong time)   { _end_time = time; }
   void set_before_gc_usage(int pool_index, MemoryUsage usage) {
     assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
     set_gc_usage(pool_index, usage, true /* before gc */);
   }
   void set_after_gc_usage(int pool_index, MemoryUsage usage) {
     assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
     set_gc_usage(pool_index, usage, false /* after gc */);
   }
   void clear();
 };
 class GCMemoryManager : public MemoryManager {
 private:
   // TODO: We should unify the GCCounter and GCMemoryManager statistic
   size_t       _num_collections;
   elapsedTimer _accumulated_timer;
   elapsedTimer _gc_timer;         // for measuring every GC duration
   GCStatInfo*  _last_gc_stat;
   Mutex*       _last_gc_lock;
   GCStatInfo*  _current_gc_stat;
   int          _num_gc_threads;
 public:
   GCMemoryManager();
   ~GCMemoryManager();
   void   initialize_gc_stat_info();
   bool   is_gc_memory_manager()         { return true; }
   jlong  gc_time_ms()                   { return _accumulated_timer.milliseconds(); }
   size_t gc_count()                     { return _num_collections; }
   int    num_gc_threads()               { return _num_gc_threads; }
   void   set_num_gc_threads(int count)  { _num_gc_threads = count; }
   void   gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
                   bool recordAccumulatedGCTime);
   void   gc_end(bool recordPostGCUsage, bool recordAccumulatedGCTime,
                 bool recordGCEndTime, bool countCollection);
   void        reset_gc_stat()   { _num_collections = 0; _accumulated_timer.reset(); }
   // Copy out _last_gc_stat to the given destination, returning
   // the collection count. Zero signifies no gc has taken place.
   size_t get_last_gc_stat(GCStatInfo* dest);
   virtual MemoryManager::Name kind() = 0;
 };
 // These subclasses of GCMemoryManager are defined to include
 // GC-specific information.
 // TODO: Add GC-specific information
 class CopyMemoryManager : public GCMemoryManager {
 private:
 public:
   CopyMemoryManager() : GCMemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::Copy; }
   const char* name()         { return "Copy"; }
 };
 class MSCMemoryManager : public GCMemoryManager {
 private:
 public:
   MSCMemoryManager() : GCMemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::MarkSweepCompact; }
   const char* name()         { return "MarkSweepCompact"; }
 };
 class ParNewMemoryManager : public GCMemoryManager {
 private:
 public:
   ParNewMemoryManager() : GCMemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::ParNew; }
   const char* name()         { return "ParNew"; }
 };
 class CMSMemoryManager : public GCMemoryManager {
 private:
 public:
   CMSMemoryManager() : GCMemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::ConcurrentMarkSweep; }
   const char* name()         { return "ConcurrentMarkSweep";}
 };
 class PSScavengeMemoryManager : public GCMemoryManager {
 private:
 public:
   PSScavengeMemoryManager() : GCMemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::PSScavenge; }
   const char* name()         { return "PS Scavenge"; }
 };
 class PSMarkSweepMemoryManager : public GCMemoryManager {
 private:
 public:
   PSMarkSweepMemoryManager() : GCMemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::PSMarkSweep; }
   const char* name()         { return "PS MarkSweep"; }
 };
 class G1YoungGenMemoryManager : public GCMemoryManager {
 private:
 public:
   G1YoungGenMemoryManager() : GCMemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::G1YoungGen; }
   const char* name()         { return "G1 Young Generation"; }
 };
 class G1OldGenMemoryManager : public GCMemoryManager {
 private:
 public:
   G1OldGenMemoryManager() : GCMemoryManager() {}
   MemoryManager::Name kind() { return MemoryManager::G1OldGen; }
   const char* name()         { return "G1 Old Generation"; }
 };

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/memoryManager.hpp@f6f3eef8a521 (annotated)

src/share/vm/services/memoryManager.hpp