Mercurial > hg > graal-compiler
diff src/share/vm/services/memoryManager.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | db0d5eba9d20 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/services/memoryManager.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,233 @@ +/* + * Copyright 2003-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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 + }; + + 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(); + +}; + +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]; + } + + 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 copy_stat(GCStatInfo* stat); +}; + +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; + 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(); + void gc_end(); + + void reset_gc_stat() { _num_collections = 0; _accumulated_timer.reset(); } + GCStatInfo* last_gc_stat() { return _last_gc_stat; } + + 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"; } +};