author | rkennke |
Thu, 30 Nov 2017 13:40:07 +0100 | |
changeset 48168 | cb5d2d4453d0 |
parent 47216 | 71c04702a3d5 |
child 49658 | 8237a91c1cca |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_SERVICES_MEMORYPOOL_HPP |
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#define SHARE_VM_SERVICES_MEMORYPOOL_HPP |
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#include "memory/heap.hpp" |
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#include "services/memoryUsage.hpp" |
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#include "utilities/macros.hpp" |
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// A memory pool represents the memory area that the VM manages. |
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// The Java virtual machine has at least one memory pool |
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// and it may create or remove memory pools during execution. |
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// A memory pool can belong to the heap or the non-heap memory. |
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// A Java virtual machine may also have memory pools belonging to |
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// both heap and non-heap memory. |
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// Forward declaration |
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class MemoryManager; |
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class SensorInfo; |
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class ThresholdSupport; |
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class MemoryPool : public CHeapObj<mtInternal> { |
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friend class MemoryManager; |
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public: |
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enum PoolType { |
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Heap = 1, |
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NonHeap = 2 |
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}; |
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private: |
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enum { |
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max_num_managers = 5 |
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}; |
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// We could make some of the following as performance counters |
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// for external monitoring. |
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const char* _name; |
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PoolType _type; |
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size_t _initial_size; |
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size_t _max_size; |
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bool _available_for_allocation; // Default is true |
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MemoryManager* _managers[max_num_managers]; |
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int _num_managers; |
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MemoryUsage _peak_usage; // Peak memory usage |
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MemoryUsage _after_gc_usage; // After GC memory usage |
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ThresholdSupport* _usage_threshold; |
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ThresholdSupport* _gc_usage_threshold; |
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SensorInfo* _usage_sensor; |
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SensorInfo* _gc_usage_sensor; |
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volatile instanceOop _memory_pool_obj; |
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void add_manager(MemoryManager* mgr); |
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public: |
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MemoryPool(const char* name, |
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PoolType type, |
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size_t init_size, |
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size_t max_size, |
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bool support_usage_threshold, |
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bool support_gc_threshold); |
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const char* name() { return _name; } |
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bool is_heap() { return _type == Heap; } |
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bool is_non_heap() { return _type == NonHeap; } |
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size_t initial_size() const { return _initial_size; } |
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int num_memory_managers() const { return _num_managers; } |
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// max size could be changed |
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virtual size_t max_size() const { return _max_size; } |
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bool is_pool(instanceHandle pool) { return (pool() == _memory_pool_obj); } |
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bool available_for_allocation() { return _available_for_allocation; } |
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bool set_available_for_allocation(bool value) { |
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bool prev = _available_for_allocation; |
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_available_for_allocation = value; |
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return prev; |
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} |
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MemoryManager* get_memory_manager(int index) { |
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assert(index >= 0 && index < _num_managers, "Invalid index"); |
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return _managers[index]; |
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} |
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// Records current memory usage if it's a peak usage |
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void record_peak_memory_usage(); |
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MemoryUsage get_peak_memory_usage() { |
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// check current memory usage first and then return peak usage |
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record_peak_memory_usage(); |
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return _peak_usage; |
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} |
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void reset_peak_memory_usage() { |
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_peak_usage = get_memory_usage(); |
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} |
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ThresholdSupport* usage_threshold() { return _usage_threshold; } |
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ThresholdSupport* gc_usage_threshold() { return _gc_usage_threshold; } |
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SensorInfo* usage_sensor() { return _usage_sensor; } |
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SensorInfo* gc_usage_sensor() { return _gc_usage_sensor; } |
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void set_usage_sensor_obj(instanceHandle s); |
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void set_gc_usage_sensor_obj(instanceHandle s); |
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void set_last_collection_usage(MemoryUsage u) { _after_gc_usage = u; } |
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virtual instanceOop get_memory_pool_instance(TRAPS); |
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virtual MemoryUsage get_memory_usage() = 0; |
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virtual size_t used_in_bytes() = 0; |
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virtual bool is_collected_pool() { return false; } |
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virtual MemoryUsage get_last_collection_usage() { return _after_gc_usage; } |
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// GC support |
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void oops_do(OopClosure* f); |
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}; |
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class CollectedMemoryPool : public MemoryPool { |
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public: |
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CollectedMemoryPool(const char* name, size_t init_size, size_t max_size, bool support_usage_threshold) : |
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MemoryPool(name, MemoryPool::Heap, init_size, max_size, support_usage_threshold, true) {}; |
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bool is_collected_pool() { return true; } |
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}; |
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class CodeHeapPool: public MemoryPool { |
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private: |
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CodeHeap* _codeHeap; |
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public: |
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CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold); |
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MemoryUsage get_memory_usage(); |
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size_t used_in_bytes() { return _codeHeap->allocated_capacity(); } |
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}; |
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class MetaspacePool : public MemoryPool { |
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size_t calculate_max_size() const; |
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public: |
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MetaspacePool(); |
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MemoryUsage get_memory_usage(); |
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size_t used_in_bytes(); |
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}; |
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class CompressedKlassSpacePool : public MemoryPool { |
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public: |
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CompressedKlassSpacePool(); |
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MemoryUsage get_memory_usage(); |
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size_t used_in_bytes(); |
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}; |
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#endif // SHARE_VM_SERVICES_MEMORYPOOL_HPP |