hotspot/src/share/vm/services/memoryManager.cpp - platform/libcore - Git at Google

 /*
  * 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.
  *
  */

 # include "incls/_precompiled.incl"
 # include "incls/_memoryManager.cpp.incl"

 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char*, int, char*, int,
   size_t, size_t, size_t, size_t);
 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char*, int, char*, int,
   size_t, size_t, size_t, size_t);

 MemoryManager::MemoryManager() {
   _num_pools = 0;
   _memory_mgr_obj = NULL;
 }

 void MemoryManager::add_pool(MemoryPool* pool) {
   assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max");
   if (_num_pools < MemoryManager::max_num_pools) {
     _pools[_num_pools] = pool;
     _num_pools++;
   }
   pool->add_manager(this);
 }

 MemoryManager* MemoryManager::get_code_cache_memory_manager() {
   return (MemoryManager*) new CodeCacheMemoryManager();
 }

 GCMemoryManager* MemoryManager::get_copy_memory_manager() {
   return (GCMemoryManager*) new CopyMemoryManager();
 }

 GCMemoryManager* MemoryManager::get_msc_memory_manager() {
   return (GCMemoryManager*) new MSCMemoryManager();
 }

 GCMemoryManager* MemoryManager::get_parnew_memory_manager() {
   return (GCMemoryManager*) new ParNewMemoryManager();
 }

 GCMemoryManager* MemoryManager::get_cms_memory_manager() {
   return (GCMemoryManager*) new CMSMemoryManager();
 }

 GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() {
   return (GCMemoryManager*) new PSScavengeMemoryManager();
 }

 GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() {
   return (GCMemoryManager*) new PSMarkSweepMemoryManager();
 }

 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) {
   // Must do an acquire so as to force ordering of subsequent
   // loads from anything _memory_mgr_obj points to or implies.
   instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj);
   if (mgr_obj == NULL) {
     // It's ok for more than one thread to execute the code up to the locked region.
     // Extra manager instances will just be gc'ed.
     klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_0);
     instanceKlassHandle ik(THREAD, k);

     Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0);

     JavaValue result(T_OBJECT);
     JavaCallArguments args;
     args.push_oop(mgr_name);    // Argument 1

     symbolHandle method_name;
     symbolHandle signature;
     if (is_gc_memory_manager()) {
       method_name = vmSymbolHandles::createGarbageCollector_name();
       signature = vmSymbolHandles::createGarbageCollector_signature();
       args.push_oop(Handle());      // Argument 2 (for future extension)
     } else {
       method_name = vmSymbolHandles::createMemoryManager_name();
       signature = vmSymbolHandles::createMemoryManager_signature();
     }

     JavaCalls::call_static(&result,
                            ik,
                            method_name,
                            signature,
                            &args,
                            CHECK_0);

     instanceOop m = (instanceOop) result.get_jobject();
     instanceHandle mgr(THREAD, m);

     {
       // Get lock before setting _memory_mgr_obj
       // since another thread may have created the instance
       MutexLocker ml(Management_lock);

       // Check if another thread has created the management object.  We reload
       // _memory_mgr_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.
       mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj);
       if (mgr_obj != NULL) {
          return mgr_obj;
       }

       // Get the address of the object we created via call_special.
       mgr_obj = mgr();

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

   return mgr_obj;
 }

 void MemoryManager::oops_do(OopClosure* f) {
   f->do_oop((oop*) &_memory_mgr_obj);
 }

 GCStatInfo::GCStatInfo(int num_pools) {
   // initialize the arrays for memory usage
   _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools);
   _after_gc_usage_array  = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools);
   size_t len = num_pools * sizeof(MemoryUsage);
   memset(_before_gc_usage_array, 0, len);
   memset(_after_gc_usage_array, 0, len);
   _usage_array_size = num_pools;
 }

 GCStatInfo::~GCStatInfo() {
   FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array);
   FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array);
 }

 void GCStatInfo::copy_stat(GCStatInfo* stat) {
   set_index(stat->gc_index());
   set_start_time(stat->start_time());
   set_end_time(stat->end_time());
   assert(_usage_array_size == stat->usage_array_size(), "Must have same array size");
   for (int i = 0; i < _usage_array_size; i++) {
     set_before_gc_usage(i, stat->before_gc_usage_for_pool(i));
     set_after_gc_usage(i, stat->after_gc_usage_for_pool(i));
   }
 }

 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) {
   MemoryUsage* gc_usage_array;
   if (before_gc) {
     gc_usage_array = _before_gc_usage_array;
   } else {
     gc_usage_array = _after_gc_usage_array;
   }
   gc_usage_array[pool_index] = usage;
 }

 GCMemoryManager::GCMemoryManager() : MemoryManager() {
   _num_collections = 0;
   _last_gc_stat = NULL;
   _num_gc_threads = 1;
 }

 GCMemoryManager::~GCMemoryManager() {
   delete _last_gc_stat;
 }

 void GCMemoryManager::initialize_gc_stat_info() {
   assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
   _last_gc_stat = new GCStatInfo(MemoryService::num_memory_pools());
 }

 void GCMemoryManager::gc_begin() {
   assert(_last_gc_stat != NULL, "Just checking");
   _accumulated_timer.start();
   _num_collections++;
   _last_gc_stat->set_index(_num_collections);
   _last_gc_stat->set_start_time(Management::timestamp());

   // Keep memory usage of all memory pools
   for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
     MemoryPool* pool = MemoryService::get_memory_pool(i);
     MemoryUsage usage = pool->get_memory_usage();
     _last_gc_stat->set_before_gc_usage(i, usage);
     HS_DTRACE_PROBE8(hotspot, mem__pool__gc__begin,
       name(), strlen(name()),
       pool->name(), strlen(pool->name()),
       usage.init_size(), usage.used(),
       usage.committed(), usage.max_size());
   }
 }

 void GCMemoryManager::gc_end() {
   _accumulated_timer.stop();
   _last_gc_stat->set_end_time(Management::timestamp());

   int i;
   // keep the last gc statistics for all memory pools
   for (i = 0; i < MemoryService::num_memory_pools(); i++) {
     MemoryPool* pool = MemoryService::get_memory_pool(i);
     MemoryUsage usage = pool->get_memory_usage();

     HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end,
       name(), strlen(name()),
       pool->name(), strlen(pool->name()),
       usage.init_size(), usage.used(),
       usage.committed(), usage.max_size());

     _last_gc_stat->set_after_gc_usage(i, usage);
   }

   // Set last collection usage of the memory pools managed by this collector
   for (i = 0; i < num_memory_pools(); i++) {
     MemoryPool* pool = get_memory_pool(i);
     MemoryUsage usage = pool->get_memory_usage();

     // Compare with GC usage threshold
     pool->set_last_collection_usage(usage);
     LowMemoryDetector::detect_after_gc_memory(pool);
   }
 }
	/*
	* 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.
	*
	*/

	# include "incls/_precompiled.incl"
	# include "incls/_memoryManager.cpp.incl"

	HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char, int, char, int,
	size_t, size_t, size_t, size_t);
	HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char, int, char, int,
	size_t, size_t, size_t, size_t);

	MemoryManager::MemoryManager() {
	_num_pools = 0;
	_memory_mgr_obj = NULL;
	}

	void MemoryManager::add_pool(MemoryPool* pool) {
	assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max");
	if (_num_pools < MemoryManager::max_num_pools) {
	_pools[_num_pools] = pool;
	_num_pools++;
	}
	pool->add_manager(this);
	}

	MemoryManager* MemoryManager::get_code_cache_memory_manager() {
	return (MemoryManager*) new CodeCacheMemoryManager();
	}

	GCMemoryManager* MemoryManager::get_copy_memory_manager() {
	return (GCMemoryManager*) new CopyMemoryManager();
	}

	GCMemoryManager* MemoryManager::get_msc_memory_manager() {
	return (GCMemoryManager*) new MSCMemoryManager();
	}

	GCMemoryManager* MemoryManager::get_parnew_memory_manager() {
	return (GCMemoryManager*) new ParNewMemoryManager();
	}

	GCMemoryManager* MemoryManager::get_cms_memory_manager() {
	return (GCMemoryManager*) new CMSMemoryManager();
	}

	GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() {
	return (GCMemoryManager*) new PSScavengeMemoryManager();
	}

	GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() {
	return (GCMemoryManager*) new PSMarkSweepMemoryManager();
	}

	instanceOop MemoryManager::get_memory_manager_instance(TRAPS) {
	// Must do an acquire so as to force ordering of subsequent
	// loads from anything _memory_mgr_obj points to or implies.
	instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj);
	if (mgr_obj == NULL) {
	// It's ok for more than one thread to execute the code up to the locked region.
	// Extra manager instances will just be gc'ed.
	klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_0);
	instanceKlassHandle ik(THREAD, k);

	Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0);

	JavaValue result(T_OBJECT);
	JavaCallArguments args;
	args.push_oop(mgr_name); // Argument 1

	symbolHandle method_name;
	symbolHandle signature;
	if (is_gc_memory_manager()) {
	method_name = vmSymbolHandles::createGarbageCollector_name();
	signature = vmSymbolHandles::createGarbageCollector_signature();
	args.push_oop(Handle()); // Argument 2 (for future extension)
	} else {
	method_name = vmSymbolHandles::createMemoryManager_name();
	signature = vmSymbolHandles::createMemoryManager_signature();
	}

	JavaCalls::call_static(&result,
	ik,
	method_name,
	signature,
	&args,
	CHECK_0);

	instanceOop m = (instanceOop) result.get_jobject();
	instanceHandle mgr(THREAD, m);

	{
	// Get lock before setting _memory_mgr_obj
	// since another thread may have created the instance
	MutexLocker ml(Management_lock);

	// Check if another thread has created the management object. We reload
	// _memory_mgr_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.
	mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj);
	if (mgr_obj != NULL) {
	return mgr_obj;
	}

	// Get the address of the object we created via call_special.
	mgr_obj = mgr();

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

	return mgr_obj;
	}

	void MemoryManager::oops_do(OopClosure* f) {
	f->do_oop((oop*) &_memory_mgr_obj);
	}

	GCStatInfo::GCStatInfo(int num_pools) {
	// initialize the arrays for memory usage
	_before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools);
	_after_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools);
	size_t len = num_pools * sizeof(MemoryUsage);
	memset(_before_gc_usage_array, 0, len);
	memset(_after_gc_usage_array, 0, len);
	_usage_array_size = num_pools;
	}

	GCStatInfo::~GCStatInfo() {
	FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array);
	FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array);
	}

	void GCStatInfo::copy_stat(GCStatInfo* stat) {
	set_index(stat->gc_index());
	set_start_time(stat->start_time());
	set_end_time(stat->end_time());
	assert(_usage_array_size == stat->usage_array_size(), "Must have same array size");
	for (int i = 0; i < _usage_array_size; i++) {
	set_before_gc_usage(i, stat->before_gc_usage_for_pool(i));
	set_after_gc_usage(i, stat->after_gc_usage_for_pool(i));
	}
	}

	void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) {
	MemoryUsage* gc_usage_array;
	if (before_gc) {
	gc_usage_array = _before_gc_usage_array;
	} else {
	gc_usage_array = _after_gc_usage_array;
	}
	gc_usage_array[pool_index] = usage;
	}

	GCMemoryManager::GCMemoryManager() : MemoryManager() {
	_num_collections = 0;
	_last_gc_stat = NULL;
	_num_gc_threads = 1;
	}

	GCMemoryManager::~GCMemoryManager() {
	delete _last_gc_stat;
	}

	void GCMemoryManager::initialize_gc_stat_info() {
	assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
	_last_gc_stat = new GCStatInfo(MemoryService::num_memory_pools());
	}

	void GCMemoryManager::gc_begin() {
	assert(_last_gc_stat != NULL, "Just checking");
	_accumulated_timer.start();
	_num_collections++;
	_last_gc_stat->set_index(_num_collections);
	_last_gc_stat->set_start_time(Management::timestamp());

	// Keep memory usage of all memory pools
	for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
	MemoryPool* pool = MemoryService::get_memory_pool(i);
	MemoryUsage usage = pool->get_memory_usage();
	_last_gc_stat->set_before_gc_usage(i, usage);
	HS_DTRACE_PROBE8(hotspot, mem__pool__gc__begin,
	name(), strlen(name()),
	pool->name(), strlen(pool->name()),
	usage.init_size(), usage.used(),
	usage.committed(), usage.max_size());
	}
	}

	void GCMemoryManager::gc_end() {
	_accumulated_timer.stop();
	_last_gc_stat->set_end_time(Management::timestamp());

	int i;
	// keep the last gc statistics for all memory pools
	for (i = 0; i < MemoryService::num_memory_pools(); i++) {
	MemoryPool* pool = MemoryService::get_memory_pool(i);
	MemoryUsage usage = pool->get_memory_usage();

	HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end,
	name(), strlen(name()),
	pool->name(), strlen(pool->name()),
	usage.init_size(), usage.used(),
	usage.committed(), usage.max_size());

	_last_gc_stat->set_after_gc_usage(i, usage);
	}

	// Set last collection usage of the memory pools managed by this collector
	for (i = 0; i < num_memory_pools(); i++) {
	MemoryPool* pool = get_memory_pool(i);
	MemoryUsage usage = pool->get_memory_usage();

	// Compare with GC usage threshold
	pool->set_last_collection_usage(usage);
	LowMemoryDetector::detect_after_gc_memory(pool);
	}
	}