| /* |
| * Copyright (c) 2003, 2013, 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. |
| * |
| */ |
| |
| #ifndef SHARE_VM_SERVICES_MEMORYMANAGER_HPP |
| #define SHARE_VM_SERVICES_MEMORYMANAGER_HPP |
| |
| #include "memory/allocation.hpp" |
| #include "runtime/timer.hpp" |
| #include "services/memoryUsage.hpp" |
| |
| // 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<mtInternal> { |
| private: |
| enum { |
| max_num_pools = 10 |
| }; |
| |
| MemoryPool* _pools[max_num_pools]; |
| int _num_pools; |
| |
| protected: |
| volatile instanceOop _memory_mgr_obj; |
| |
| public: |
| 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 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 MemoryManager* get_metaspace_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() {} |
| |
| const char* name() { return "CodeCacheManager"; } |
| }; |
| |
| class MetaspaceMemoryManager : public MemoryManager { |
| public: |
| MetaspaceMemoryManager() : MemoryManager() {} |
| |
| const char* name() { return "Metaspace Manager"; } |
| }; |
| |
| class GCStatInfo : public ResourceObj { |
| 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; |
| volatile bool _notification_enabled; |
| 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, GCCause::Cause cause); |
| |
| 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); |
| |
| void set_notification_enabled(bool enabled) { _notification_enabled = enabled; } |
| bool is_notification_enabled() { return _notification_enabled; } |
| }; |
| |
| // These subclasses of GCMemoryManager are defined to include |
| // GC-specific information. |
| // TODO: Add GC-specific information |
| class CopyMemoryManager : public GCMemoryManager { |
| private: |
| public: |
| CopyMemoryManager() : GCMemoryManager() {} |
| |
| const char* name() { return "Copy"; } |
| }; |
| |
| class MSCMemoryManager : public GCMemoryManager { |
| private: |
| public: |
| MSCMemoryManager() : GCMemoryManager() {} |
| |
| const char* name() { return "MarkSweepCompact"; } |
| }; |
| |
| class ParNewMemoryManager : public GCMemoryManager { |
| private: |
| public: |
| ParNewMemoryManager() : GCMemoryManager() {} |
| |
| const char* name() { return "ParNew"; } |
| }; |
| |
| class CMSMemoryManager : public GCMemoryManager { |
| private: |
| public: |
| CMSMemoryManager() : GCMemoryManager() {} |
| |
| const char* name() { return "ConcurrentMarkSweep";} |
| }; |
| |
| class PSScavengeMemoryManager : public GCMemoryManager { |
| private: |
| public: |
| PSScavengeMemoryManager() : GCMemoryManager() {} |
| |
| const char* name() { return "PS Scavenge"; } |
| }; |
| |
| class PSMarkSweepMemoryManager : public GCMemoryManager { |
| private: |
| public: |
| PSMarkSweepMemoryManager() : GCMemoryManager() {} |
| |
| const char* name() { return "PS MarkSweep"; } |
| }; |
| |
| class G1YoungGenMemoryManager : public GCMemoryManager { |
| private: |
| public: |
| G1YoungGenMemoryManager() : GCMemoryManager() {} |
| |
| const char* name() { return "G1 Young Generation"; } |
| }; |
| |
| class G1OldGenMemoryManager : public GCMemoryManager { |
| private: |
| public: |
| G1OldGenMemoryManager() : GCMemoryManager() {} |
| |
| const char* name() { return "G1 Old Generation"; } |
| }; |
| |
| #endif // SHARE_VM_SERVICES_MEMORYMANAGER_HPP |