src/share/vm/services/memoryPool.cpp - platform/external/jetbrains/jdk8u_hotspot - Git at Google

 /*
  * 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.
  *
  */

 #include "precompiled.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "memory/metaspace.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/javaCalls.hpp"
 #include "runtime/orderAccess.inline.hpp"
 #include "services/lowMemoryDetector.hpp"
 #include "services/management.hpp"
 #include "services/memoryManager.hpp"
 #include "services/memoryPool.hpp"
 #include "utilities/macros.hpp"
 #include "utilities/globalDefinitions.hpp"

 MemoryPool::MemoryPool(const char* name,
                        PoolType type,
                        size_t init_size,
                        size_t max_size,
                        bool support_usage_threshold,
                        bool support_gc_threshold) {
   _name = name;
   _initial_size = init_size;
   _max_size = max_size;
   (void)const_cast<instanceOop&>(_memory_pool_obj = NULL);
   _available_for_allocation = true;
   _num_managers = 0;
   _type = type;

   // initialize the max and init size of collection usage
   _after_gc_usage = MemoryUsage(_initial_size, 0, 0, _max_size);

   _usage_sensor = NULL;
   _gc_usage_sensor = NULL;
   // usage threshold supports both high and low threshold
   _usage_threshold = new ThresholdSupport(support_usage_threshold, support_usage_threshold);
   // gc usage threshold supports only high threshold
   _gc_usage_threshold = new ThresholdSupport(support_gc_threshold, support_gc_threshold);
 }

 void MemoryPool::add_manager(MemoryManager* mgr) {
   assert(_num_managers < MemoryPool::max_num_managers, "_num_managers exceeds the max");
   if (_num_managers < MemoryPool::max_num_managers) {
     _managers[_num_managers] = mgr;
     _num_managers++;
   }
 }


 // Returns an instanceHandle of a MemoryPool object.
 // It creates a MemoryPool instance when the first time
 // this function is called.
 instanceOop MemoryPool::get_memory_pool_instance(TRAPS) {
   // Must do an acquire so as to force ordering of subsequent
   // loads from anything _memory_pool_obj points to or implies.
   instanceOop pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj);
   if (pool_obj == NULL) {
     // It's ok for more than one thread to execute the code up to the locked region.
     // Extra pool instances will just be gc'ed.
     Klass* k = Management::sun_management_ManagementFactory_klass(CHECK_NULL);
     instanceKlassHandle ik(THREAD, k);

     Handle pool_name = java_lang_String::create_from_str(_name, CHECK_NULL);
     jlong usage_threshold_value = (_usage_threshold->is_high_threshold_supported() ? 0 : -1L);
     jlong gc_usage_threshold_value = (_gc_usage_threshold->is_high_threshold_supported() ? 0 : -1L);

     JavaValue result(T_OBJECT);
     JavaCallArguments args;
     args.push_oop(pool_name);           // Argument 1
     args.push_int((int) is_heap());     // Argument 2

     Symbol* method_name = vmSymbols::createMemoryPool_name();
     Symbol* signature = vmSymbols::createMemoryPool_signature();

     args.push_long(usage_threshold_value);    // Argument 3
     args.push_long(gc_usage_threshold_value); // Argument 4

     JavaCalls::call_static(&result,
                            ik,
                            method_name,
                            signature,
                            &args,
                            CHECK_NULL);

     instanceOop p = (instanceOop) result.get_jobject();
     instanceHandle pool(THREAD, p);

     {
       // Get lock since another thread may have create the instance
       MutexLocker ml(Management_lock);

       // Check if another thread has created the pool.  We reload
       // _memory_pool_obj here because some other thread may have
       // initialized it while we were executing the code before the lock.
       //
       // The lock has done an acquire, so the load can't float above it,
       // but we need to do a load_acquire as above.
       pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj);
       if (pool_obj != NULL) {
          return pool_obj;
       }

       // Get the address of the object we created via call_special.
       pool_obj = pool();

       // Use store barrier to make sure the memory accesses associated
       // with creating the pool are visible before publishing its address.
       // The unlock will publish the store to _memory_pool_obj because
       // it does a release first.
       OrderAccess::release_store_ptr(&_memory_pool_obj, pool_obj);
     }
   }

   return pool_obj;
 }

 inline static size_t get_max_value(size_t val1, size_t val2) {
     return (val1 > val2 ? val1 : val2);
 }

 void MemoryPool::record_peak_memory_usage() {
   // Caller in JDK is responsible for synchronization -
   // acquire the lock for this memory pool before calling VM
   MemoryUsage usage = get_memory_usage();
   size_t peak_used = get_max_value(usage.used(), _peak_usage.used());
   size_t peak_committed = get_max_value(usage.committed(), _peak_usage.committed());
   size_t peak_max_size = get_max_value(usage.max_size(), _peak_usage.max_size());

   _peak_usage = MemoryUsage(initial_size(), peak_used, peak_committed, peak_max_size);
 }

 static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) {
   assert(*sensor_ptr == NULL, "Should be called only once");
   SensorInfo* sensor = new SensorInfo();
   sensor->set_sensor(sh());
   *sensor_ptr = sensor;
 }

 void MemoryPool::set_usage_sensor_obj(instanceHandle sh) {
   set_sensor_obj_at(&_usage_sensor, sh);
 }

 void MemoryPool::set_gc_usage_sensor_obj(instanceHandle sh) {
   set_sensor_obj_at(&_gc_usage_sensor, sh);
 }

 void MemoryPool::oops_do(OopClosure* f) {
   f->do_oop((oop*) &_memory_pool_obj);
   if (_usage_sensor != NULL) {
     _usage_sensor->oops_do(f);
   }
   if (_gc_usage_sensor != NULL) {
     _gc_usage_sensor->oops_do(f);
   }
 }

 ContiguousSpacePool::ContiguousSpacePool(ContiguousSpace* space,
                                          const char* name,
                                          PoolType type,
                                          size_t max_size,
                                          bool support_usage_threshold) :
   CollectedMemoryPool(name, type, space->capacity(), max_size,
                       support_usage_threshold), _space(space) {
 }

 MemoryUsage ContiguousSpacePool::get_memory_usage() {
   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
   size_t used      = used_in_bytes();
   size_t committed = _space->capacity();

   return MemoryUsage(initial_size(), used, committed, maxSize);
 }

 SurvivorContiguousSpacePool::SurvivorContiguousSpacePool(DefNewGeneration* gen,
                                                          const char* name,
                                                          PoolType type,
                                                          size_t max_size,
                                                          bool support_usage_threshold) :
   CollectedMemoryPool(name, type, gen->from()->capacity(), max_size,
                       support_usage_threshold), _gen(gen) {
 }

 MemoryUsage SurvivorContiguousSpacePool::get_memory_usage() {
   size_t maxSize = (available_for_allocation() ? max_size() : 0);
   size_t used    = used_in_bytes();
   size_t committed = committed_in_bytes();

   return MemoryUsage(initial_size(), used, committed, maxSize);
 }

 #if INCLUDE_ALL_GCS
 CompactibleFreeListSpacePool::CompactibleFreeListSpacePool(CompactibleFreeListSpace* space,
                                                            const char* name,
                                                            PoolType type,
                                                            size_t max_size,
                                                            bool support_usage_threshold) :
   CollectedMemoryPool(name, type, space->capacity(), max_size,
                       support_usage_threshold), _space(space) {
 }

 MemoryUsage CompactibleFreeListSpacePool::get_memory_usage() {
   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
   size_t used      = used_in_bytes();
   size_t committed = _space->capacity();

   return MemoryUsage(initial_size(), used, committed, maxSize);
 }
 #endif // INCLUDE_ALL_GCS

 GenerationPool::GenerationPool(Generation* gen,
                                const char* name,
                                PoolType type,
                                bool support_usage_threshold) :
   CollectedMemoryPool(name, type, gen->capacity(), gen->max_capacity(),
                       support_usage_threshold), _gen(gen) {
 }

 MemoryUsage GenerationPool::get_memory_usage() {
   size_t used      = used_in_bytes();
   size_t committed = _gen->capacity();
   size_t maxSize   = (available_for_allocation() ? max_size() : 0);

   return MemoryUsage(initial_size(), used, committed, maxSize);
 }

 CodeHeapPool::CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold) :
   MemoryPool(name, NonHeap, codeHeap->capacity(), codeHeap->max_capacity(),
              support_usage_threshold, false), _codeHeap(codeHeap) {
 }

 MemoryUsage CodeHeapPool::get_memory_usage() {
   size_t used      = used_in_bytes();
   size_t committed = _codeHeap->capacity();
   size_t maxSize   = (available_for_allocation() ? max_size() : 0);

   return MemoryUsage(initial_size(), used, committed, maxSize);
 }

 MetaspacePool::MetaspacePool() :
   MemoryPool("Metaspace", NonHeap, 0, calculate_max_size(), true, false) { }

 MemoryUsage MetaspacePool::get_memory_usage() {
   size_t committed = MetaspaceAux::committed_bytes();
   return MemoryUsage(initial_size(), used_in_bytes(), committed, max_size());
 }

 size_t MetaspacePool::used_in_bytes() {
   return MetaspaceAux::used_bytes();
 }

 size_t MetaspacePool::calculate_max_size() const {
   return FLAG_IS_CMDLINE(MaxMetaspaceSize) ? MaxMetaspaceSize :
                                              MemoryUsage::undefined_size();
 }

 CompressedKlassSpacePool::CompressedKlassSpacePool() :
   MemoryPool("Compressed Class Space", NonHeap, 0, CompressedClassSpaceSize, true, false) { }

 size_t CompressedKlassSpacePool::used_in_bytes() {
   return MetaspaceAux::used_bytes(Metaspace::ClassType);
 }

 MemoryUsage CompressedKlassSpacePool::get_memory_usage() {
   size_t committed = MetaspaceAux::committed_bytes(Metaspace::ClassType);
   return MemoryUsage(initial_size(), used_in_bytes(), committed, max_size());
 }
	/*
	* 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.
	*
	*/

	#include "precompiled.hpp"
	#include "classfile/systemDictionary.hpp"
	#include "classfile/vmSymbols.hpp"
	#include "memory/metaspace.hpp"
	#include "oops/oop.inline.hpp"
	#include "runtime/handles.inline.hpp"
	#include "runtime/javaCalls.hpp"
	#include "runtime/orderAccess.inline.hpp"
	#include "services/lowMemoryDetector.hpp"
	#include "services/management.hpp"
	#include "services/memoryManager.hpp"
	#include "services/memoryPool.hpp"
	#include "utilities/macros.hpp"
	#include "utilities/globalDefinitions.hpp"

	MemoryPool::MemoryPool(const char* name,
	PoolType type,
	size_t init_size,
	size_t max_size,
	bool support_usage_threshold,
	bool support_gc_threshold) {
	_name = name;
	_initial_size = init_size;
	_max_size = max_size;
	(void)const_cast<instanceOop&>(_memory_pool_obj = NULL);
	_available_for_allocation = true;
	_num_managers = 0;
	_type = type;

	// initialize the max and init size of collection usage
	_after_gc_usage = MemoryUsage(_initial_size, 0, 0, _max_size);

	_usage_sensor = NULL;
	_gc_usage_sensor = NULL;
	// usage threshold supports both high and low threshold
	_usage_threshold = new ThresholdSupport(support_usage_threshold, support_usage_threshold);
	// gc usage threshold supports only high threshold
	_gc_usage_threshold = new ThresholdSupport(support_gc_threshold, support_gc_threshold);
	}

	void MemoryPool::add_manager(MemoryManager* mgr) {
	assert(_num_managers < MemoryPool::max_num_managers, "_num_managers exceeds the max");
	if (_num_managers < MemoryPool::max_num_managers) {
	_managers[_num_managers] = mgr;
	_num_managers++;
	}
	}


	// Returns an instanceHandle of a MemoryPool object.
	// It creates a MemoryPool instance when the first time
	// this function is called.
	instanceOop MemoryPool::get_memory_pool_instance(TRAPS) {
	// Must do an acquire so as to force ordering of subsequent
	// loads from anything _memory_pool_obj points to or implies.
	instanceOop pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj);
	if (pool_obj == NULL) {
	// It's ok for more than one thread to execute the code up to the locked region.
	// Extra pool instances will just be gc'ed.
	Klass* k = Management::sun_management_ManagementFactory_klass(CHECK_NULL);
	instanceKlassHandle ik(THREAD, k);

	Handle pool_name = java_lang_String::create_from_str(_name, CHECK_NULL);
	jlong usage_threshold_value = (_usage_threshold->is_high_threshold_supported() ? 0 : -1L);
	jlong gc_usage_threshold_value = (_gc_usage_threshold->is_high_threshold_supported() ? 0 : -1L);

	JavaValue result(T_OBJECT);
	JavaCallArguments args;
	args.push_oop(pool_name); // Argument 1
	args.push_int((int) is_heap()); // Argument 2

	Symbol* method_name = vmSymbols::createMemoryPool_name();
	Symbol* signature = vmSymbols::createMemoryPool_signature();

	args.push_long(usage_threshold_value); // Argument 3
	args.push_long(gc_usage_threshold_value); // Argument 4

	JavaCalls::call_static(&result,
	ik,
	method_name,
	signature,
	&args,
	CHECK_NULL);

	instanceOop p = (instanceOop) result.get_jobject();
	instanceHandle pool(THREAD, p);

	{
	// Get lock since another thread may have create the instance
	MutexLocker ml(Management_lock);

	// Check if another thread has created the pool. We reload
	// _memory_pool_obj here because some other thread may have
	// initialized it while we were executing the code before the lock.
	//
	// The lock has done an acquire, so the load can't float above it,
	// but we need to do a load_acquire as above.
	pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj);
	if (pool_obj != NULL) {
	return pool_obj;
	}

	// Get the address of the object we created via call_special.
	pool_obj = pool();

	// Use store barrier to make sure the memory accesses associated
	// with creating the pool are visible before publishing its address.
	// The unlock will publish the store to _memory_pool_obj because
	// it does a release first.
	OrderAccess::release_store_ptr(&_memory_pool_obj, pool_obj);
	}
	}

	return pool_obj;
	}

	inline static size_t get_max_value(size_t val1, size_t val2) {
	return (val1 > val2 ? val1 : val2);
	}

	void MemoryPool::record_peak_memory_usage() {
	// Caller in JDK is responsible for synchronization -
	// acquire the lock for this memory pool before calling VM
	MemoryUsage usage = get_memory_usage();
	size_t peak_used = get_max_value(usage.used(), _peak_usage.used());
	size_t peak_committed = get_max_value(usage.committed(), _peak_usage.committed());
	size_t peak_max_size = get_max_value(usage.max_size(), _peak_usage.max_size());

	_peak_usage = MemoryUsage(initial_size(), peak_used, peak_committed, peak_max_size);
	}

	static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) {
	assert(*sensor_ptr == NULL, "Should be called only once");
	SensorInfo* sensor = new SensorInfo();
	sensor->set_sensor(sh());
	*sensor_ptr = sensor;
	}

	void MemoryPool::set_usage_sensor_obj(instanceHandle sh) {
	set_sensor_obj_at(&_usage_sensor, sh);
	}

	void MemoryPool::set_gc_usage_sensor_obj(instanceHandle sh) {
	set_sensor_obj_at(&_gc_usage_sensor, sh);
	}

	void MemoryPool::oops_do(OopClosure* f) {
	f->do_oop((oop*) &_memory_pool_obj);
	if (_usage_sensor != NULL) {
	_usage_sensor->oops_do(f);
	}
	if (_gc_usage_sensor != NULL) {
	_gc_usage_sensor->oops_do(f);
	}
	}

	ContiguousSpacePool::ContiguousSpacePool(ContiguousSpace* space,
	const char* name,
	PoolType type,
	size_t max_size,
	bool support_usage_threshold) :
	CollectedMemoryPool(name, type, space->capacity(), max_size,
	support_usage_threshold), _space(space) {
	}

	MemoryUsage ContiguousSpacePool::get_memory_usage() {
	size_t maxSize = (available_for_allocation() ? max_size() : 0);
	size_t used = used_in_bytes();
	size_t committed = _space->capacity();

	return MemoryUsage(initial_size(), used, committed, maxSize);
	}

	SurvivorContiguousSpacePool::SurvivorContiguousSpacePool(DefNewGeneration* gen,
	const char* name,
	PoolType type,
	size_t max_size,
	bool support_usage_threshold) :
	CollectedMemoryPool(name, type, gen->from()->capacity(), max_size,
	support_usage_threshold), _gen(gen) {
	}

	MemoryUsage SurvivorContiguousSpacePool::get_memory_usage() {
	size_t maxSize = (available_for_allocation() ? max_size() : 0);
	size_t used = used_in_bytes();
	size_t committed = committed_in_bytes();

	return MemoryUsage(initial_size(), used, committed, maxSize);
	}

	#if INCLUDE_ALL_GCS
	CompactibleFreeListSpacePool::CompactibleFreeListSpacePool(CompactibleFreeListSpace* space,
	const char* name,
	PoolType type,
	size_t max_size,
	bool support_usage_threshold) :
	CollectedMemoryPool(name, type, space->capacity(), max_size,
	support_usage_threshold), _space(space) {
	}

	MemoryUsage CompactibleFreeListSpacePool::get_memory_usage() {
	size_t maxSize = (available_for_allocation() ? max_size() : 0);
	size_t used = used_in_bytes();
	size_t committed = _space->capacity();

	return MemoryUsage(initial_size(), used, committed, maxSize);
	}
	#endif // INCLUDE_ALL_GCS

	GenerationPool::GenerationPool(Generation* gen,
	const char* name,
	PoolType type,
	bool support_usage_threshold) :
	CollectedMemoryPool(name, type, gen->capacity(), gen->max_capacity(),
	support_usage_threshold), _gen(gen) {
	}

	MemoryUsage GenerationPool::get_memory_usage() {
	size_t used = used_in_bytes();
	size_t committed = _gen->capacity();
	size_t maxSize = (available_for_allocation() ? max_size() : 0);

	return MemoryUsage(initial_size(), used, committed, maxSize);
	}

	CodeHeapPool::CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold) :
	MemoryPool(name, NonHeap, codeHeap->capacity(), codeHeap->max_capacity(),
	support_usage_threshold, false), _codeHeap(codeHeap) {
	}

	MemoryUsage CodeHeapPool::get_memory_usage() {
	size_t used = used_in_bytes();
	size_t committed = _codeHeap->capacity();
	size_t maxSize = (available_for_allocation() ? max_size() : 0);

	return MemoryUsage(initial_size(), used, committed, maxSize);
	}

	MetaspacePool::MetaspacePool() :
	MemoryPool("Metaspace", NonHeap, 0, calculate_max_size(), true, false) { }

	MemoryUsage MetaspacePool::get_memory_usage() {
	size_t committed = MetaspaceAux::committed_bytes();
	return MemoryUsage(initial_size(), used_in_bytes(), committed, max_size());
	}

	size_t MetaspacePool::used_in_bytes() {
	return MetaspaceAux::used_bytes();
	}

	size_t MetaspacePool::calculate_max_size() const {
	return FLAG_IS_CMDLINE(MaxMetaspaceSize) ? MaxMetaspaceSize :
	MemoryUsage::undefined_size();
	}

	CompressedKlassSpacePool::CompressedKlassSpacePool() :
	MemoryPool("Compressed Class Space", NonHeap, 0, CompressedClassSpaceSize, true, false) { }

	size_t CompressedKlassSpacePool::used_in_bytes() {
	return MetaspaceAux::used_bytes(Metaspace::ClassType);
	}

	MemoryUsage CompressedKlassSpacePool::get_memory_usage() {
	size_t committed = MetaspaceAux::committed_bytes(Metaspace::ClassType);
	return MemoryUsage(initial_size(), used_in_bytes(), committed, max_size());
	}