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src/share/vm/services/memoryPool.cpp@a61af66fc99e (annotated)

src/share/vm/services/memoryPool.cpp

Sat, 01 Dec 2007 00:00:00 +0000

author

duke

date

Sat, 01 Dec 2007 00:00:00 +0000

changeset 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

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duke@435	1	/*
duke@435	2	* Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	# include "incls/_precompiled.incl"
duke@435	26	# include "incls/_memoryPool.cpp.incl"
duke@435	27
duke@435	28	MemoryPool::MemoryPool(const char* name,
duke@435	29	PoolType type,
duke@435	30	size_t init_size,
duke@435	31	size_t max_size,
duke@435	32	bool support_usage_threshold,
duke@435	33	bool support_gc_threshold) {
duke@435	34	_name = name;
duke@435	35	_initial_size = init_size;
duke@435	36	_max_size = max_size;
duke@435	37	_memory_pool_obj = NULL;
duke@435	38	_available_for_allocation = true;
duke@435	39	_num_managers = 0;
duke@435	40	_type = type;
duke@435	41
duke@435	42	// initialize the max and init size of collection usage
duke@435	43	_after_gc_usage = MemoryUsage(_initial_size, 0, 0, _max_size);
duke@435	44
duke@435	45	_usage_sensor = NULL;
duke@435	46	_gc_usage_sensor = NULL;
duke@435	47	// usage threshold supports both high and low threshold
duke@435	48	_usage_threshold = new ThresholdSupport(support_usage_threshold, support_usage_threshold);
duke@435	49	// gc usage threshold supports only high threshold
duke@435	50	_gc_usage_threshold = new ThresholdSupport(support_gc_threshold, support_gc_threshold);
duke@435	51	}
duke@435	52
duke@435	53	void MemoryPool::add_manager(MemoryManager* mgr) {
duke@435	54	assert(_num_managers < MemoryPool::max_num_managers, "_num_managers exceeds the max");
duke@435	55	if (_num_managers < MemoryPool::max_num_managers) {
duke@435	56	_managers[_num_managers] = mgr;
duke@435	57	_num_managers++;
duke@435	58	}
duke@435	59	}
duke@435	60
duke@435	61
duke@435	62	// Returns an instanceHandle of a MemoryPool object.
duke@435	63	// It creates a MemoryPool instance when the first time
duke@435	64	// this function is called.
duke@435	65	instanceOop MemoryPool::get_memory_pool_instance(TRAPS) {
duke@435	66	// Must do an acquire so as to force ordering of subsequent
duke@435	67	// loads from anything _memory_pool_obj points to or implies.
duke@435	68	instanceOop pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj);
duke@435	69	if (pool_obj == NULL) {
duke@435	70	// It's ok for more than one thread to execute the code up to the locked region.
duke@435	71	// Extra pool instances will just be gc'ed.
duke@435	72	klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_NULL);
duke@435	73	instanceKlassHandle ik(THREAD, k);
duke@435	74
duke@435	75	Handle pool_name = java_lang_String::create_from_str(_name, CHECK_NULL);
duke@435	76	jlong usage_threshold_value = (_usage_threshold->is_high_threshold_supported() ? 0 : -1L);
duke@435	77	jlong gc_usage_threshold_value = (_gc_usage_threshold->is_high_threshold_supported() ? 0 : -1L);
duke@435	78
duke@435	79	JavaValue result(T_OBJECT);
duke@435	80	JavaCallArguments args;
duke@435	81	args.push_oop(pool_name); // Argument 1
duke@435	82	args.push_int((int) is_heap()); // Argument 2
duke@435	83
duke@435	84	symbolHandle method_name = vmSymbolHandles::createMemoryPool_name();
duke@435	85	symbolHandle signature = vmSymbolHandles::createMemoryPool_signature();
duke@435	86
duke@435	87	args.push_long(usage_threshold_value); // Argument 3
duke@435	88	args.push_long(gc_usage_threshold_value); // Argument 4
duke@435	89
duke@435	90	JavaCalls::call_static(&result,
duke@435	91	ik,
duke@435	92	method_name,
duke@435	93	signature,
duke@435	94	&args,
duke@435	95	CHECK_NULL);
duke@435	96
duke@435	97	instanceOop p = (instanceOop) result.get_jobject();
duke@435	98	instanceHandle pool(THREAD, p);
duke@435	99
duke@435	100	{
duke@435	101	// Get lock since another thread may have create the instance
duke@435	102	MutexLocker ml(Management_lock);
duke@435	103
duke@435	104	// Check if another thread has created the pool. We reload
duke@435	105	// _memory_pool_obj here because some other thread may have
duke@435	106	// initialized it while we were executing the code before the lock.
duke@435	107	//
duke@435	108	// The lock has done an acquire, so the load can't float above it,
duke@435	109	// but we need to do a load_acquire as above.
duke@435	110	pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj);
duke@435	111	if (pool_obj != NULL) {
duke@435	112	return pool_obj;
duke@435	113	}
duke@435	114
duke@435	115	// Get the address of the object we created via call_special.
duke@435	116	pool_obj = pool();
duke@435	117
duke@435	118	// Use store barrier to make sure the memory accesses associated
duke@435	119	// with creating the pool are visible before publishing its address.
duke@435	120	// The unlock will publish the store to _memory_pool_obj because
duke@435	121	// it does a release first.
duke@435	122	OrderAccess::release_store_ptr(&_memory_pool_obj, pool_obj);
duke@435	123	}
duke@435	124	}
duke@435	125
duke@435	126	return pool_obj;
duke@435	127	}
duke@435	128
duke@435	129	inline static size_t get_max_value(size_t val1, size_t val2) {
duke@435	130	return (val1 > val2 ? val1 : val2);
duke@435	131	}
duke@435	132
duke@435	133	void MemoryPool::record_peak_memory_usage() {
duke@435	134	// Caller in JDK is responsible for synchronization -
duke@435	135	// acquire the lock for this memory pool before calling VM
duke@435	136	MemoryUsage usage = get_memory_usage();
duke@435	137	size_t peak_used = get_max_value(usage.used(), _peak_usage.used());
duke@435	138	size_t peak_committed = get_max_value(usage.committed(), _peak_usage.committed());
duke@435	139	size_t peak_max_size = get_max_value(usage.max_size(), _peak_usage.max_size());
duke@435	140
duke@435	141	_peak_usage = MemoryUsage(initial_size(), peak_used, peak_committed, peak_max_size);
duke@435	142	}
duke@435	143
duke@435	144	static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) {
duke@435	145	assert(*sensor_ptr == NULL, "Should be called only once");
duke@435	146	SensorInfo* sensor = new SensorInfo();
duke@435	147	sensor->set_sensor(sh());
duke@435	148	*sensor_ptr = sensor;
duke@435	149	}
duke@435	150
duke@435	151	void MemoryPool::set_usage_sensor_obj(instanceHandle sh) {
duke@435	152	set_sensor_obj_at(&_usage_sensor, sh);
duke@435	153	}
duke@435	154
duke@435	155	void MemoryPool::set_gc_usage_sensor_obj(instanceHandle sh) {
duke@435	156	set_sensor_obj_at(&_gc_usage_sensor, sh);
duke@435	157	}
duke@435	158
duke@435	159	void MemoryPool::oops_do(OopClosure* f) {
duke@435	160	f->do_oop((oop*) &_memory_pool_obj);
duke@435	161	if (_usage_sensor != NULL) {
duke@435	162	_usage_sensor->oops_do(f);
duke@435	163	}
duke@435	164	if (_gc_usage_sensor != NULL) {
duke@435	165	_gc_usage_sensor->oops_do(f);
duke@435	166	}
duke@435	167	}
duke@435	168
duke@435	169	ContiguousSpacePool::ContiguousSpacePool(ContiguousSpace* space,
duke@435	170	const char* name,
duke@435	171	PoolType type,
duke@435	172	size_t max_size,
duke@435	173	bool support_usage_threshold) :
duke@435	174	CollectedMemoryPool(name, type, space->capacity(), max_size,
duke@435	175	support_usage_threshold), _space(space) {
duke@435	176	}
duke@435	177
duke@435	178	MemoryUsage ContiguousSpacePool::get_memory_usage() {
duke@435	179	size_t maxSize = (available_for_allocation() ? max_size() : 0);
duke@435	180	size_t used = used_in_bytes();
duke@435	181	size_t committed = _space->capacity();
duke@435	182
duke@435	183	return MemoryUsage(initial_size(), used, committed, maxSize);
duke@435	184	}
duke@435	185
duke@435	186	SurvivorContiguousSpacePool::SurvivorContiguousSpacePool(DefNewGeneration* gen,
duke@435	187	const char* name,
duke@435	188	PoolType type,
duke@435	189	size_t max_size,
duke@435	190	bool support_usage_threshold) :
duke@435	191	CollectedMemoryPool(name, type, gen->from()->capacity(), max_size,
duke@435	192	support_usage_threshold), _gen(gen) {
duke@435	193	}
duke@435	194
duke@435	195	MemoryUsage SurvivorContiguousSpacePool::get_memory_usage() {
duke@435	196	size_t maxSize = (available_for_allocation() ? max_size() : 0);
duke@435	197	size_t used = used_in_bytes();
duke@435	198	size_t committed = committed_in_bytes();
duke@435	199
duke@435	200	return MemoryUsage(initial_size(), used, committed, maxSize);
duke@435	201	}
duke@435	202
duke@435	203	#ifndef SERIALGC
duke@435	204	CompactibleFreeListSpacePool::CompactibleFreeListSpacePool(CompactibleFreeListSpace* space,
duke@435	205	const char* name,
duke@435	206	PoolType type,
duke@435	207	size_t max_size,
duke@435	208	bool support_usage_threshold) :
duke@435	209	CollectedMemoryPool(name, type, space->capacity(), max_size,
duke@435	210	support_usage_threshold), _space(space) {
duke@435	211	}
duke@435	212
duke@435	213	MemoryUsage CompactibleFreeListSpacePool::get_memory_usage() {
duke@435	214	size_t maxSize = (available_for_allocation() ? max_size() : 0);
duke@435	215	size_t used = used_in_bytes();
duke@435	216	size_t committed = _space->capacity();
duke@435	217
duke@435	218	return MemoryUsage(initial_size(), used, committed, maxSize);
duke@435	219	}
duke@435	220	#endif // SERIALGC
duke@435	221
duke@435	222	GenerationPool::GenerationPool(Generation* gen,
duke@435	223	const char* name,
duke@435	224	PoolType type,
duke@435	225	bool support_usage_threshold) :
duke@435	226	CollectedMemoryPool(name, type, gen->capacity(), gen->max_capacity(),
duke@435	227	support_usage_threshold), _gen(gen) {
duke@435	228	}
duke@435	229
duke@435	230	MemoryUsage GenerationPool::get_memory_usage() {
duke@435	231	size_t used = used_in_bytes();
duke@435	232	size_t committed = _gen->capacity();
duke@435	233	size_t maxSize = (available_for_allocation() ? max_size() : 0);
duke@435	234
duke@435	235	return MemoryUsage(initial_size(), used, committed, maxSize);
duke@435	236	}
duke@435	237
duke@435	238	CodeHeapPool::CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold) :
duke@435	239	MemoryPool(name, NonHeap, codeHeap->capacity(), codeHeap->max_capacity(),
duke@435	240	support_usage_threshold, false), _codeHeap(codeHeap) {
duke@435	241	}
duke@435	242
duke@435	243	MemoryUsage CodeHeapPool::get_memory_usage() {
duke@435	244	size_t used = used_in_bytes();
duke@435	245	size_t committed = _codeHeap->capacity();
duke@435	246	size_t maxSize = (available_for_allocation() ? max_size() : 0);
duke@435	247
duke@435	248	return MemoryUsage(initial_size(), used, committed, maxSize);
duke@435	249	}