duke@435: /*
duke@435:  * Copyright 2003-2005 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: # include "incls/_precompiled.incl"
duke@435: # include "incls/_memoryManager.cpp.incl"
duke@435: 
duke@435: HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char*, int, char*, int,
duke@435:   size_t, size_t, size_t, size_t);
duke@435: HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char*, int, char*, int,
duke@435:   size_t, size_t, size_t, size_t);
duke@435: 
duke@435: MemoryManager::MemoryManager() {
duke@435:   _num_pools = 0;
duke@435:   _memory_mgr_obj = NULL;
duke@435: }
duke@435: 
duke@435: void MemoryManager::add_pool(MemoryPool* pool) {
duke@435:   assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max");
duke@435:   if (_num_pools < MemoryManager::max_num_pools) {
duke@435:     _pools[_num_pools] = pool;
duke@435:     _num_pools++;
duke@435:   }
duke@435:   pool->add_manager(this);
duke@435: }
duke@435: 
duke@435: MemoryManager* MemoryManager::get_code_cache_memory_manager() {
duke@435:   return (MemoryManager*) new CodeCacheMemoryManager();
duke@435: }
duke@435: 
duke@435: GCMemoryManager* MemoryManager::get_copy_memory_manager() {
duke@435:   return (GCMemoryManager*) new CopyMemoryManager();
duke@435: }
duke@435: 
duke@435: GCMemoryManager* MemoryManager::get_msc_memory_manager() {
duke@435:   return (GCMemoryManager*) new MSCMemoryManager();
duke@435: }
duke@435: 
duke@435: GCMemoryManager* MemoryManager::get_parnew_memory_manager() {
duke@435:   return (GCMemoryManager*) new ParNewMemoryManager();
duke@435: }
duke@435: 
duke@435: GCMemoryManager* MemoryManager::get_cms_memory_manager() {
duke@435:   return (GCMemoryManager*) new CMSMemoryManager();
duke@435: }
duke@435: 
duke@435: GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() {
duke@435:   return (GCMemoryManager*) new PSScavengeMemoryManager();
duke@435: }
duke@435: 
duke@435: GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() {
duke@435:   return (GCMemoryManager*) new PSMarkSweepMemoryManager();
duke@435: }
duke@435: 
duke@435: instanceOop MemoryManager::get_memory_manager_instance(TRAPS) {
duke@435:   // Must do an acquire so as to force ordering of subsequent
duke@435:   // loads from anything _memory_mgr_obj points to or implies.
duke@435:   instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj);
duke@435:   if (mgr_obj == NULL) {
duke@435:     // It's ok for more than one thread to execute the code up to the locked region.
duke@435:     // Extra manager instances will just be gc'ed.
duke@435:     klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_0);
duke@435:     instanceKlassHandle ik(THREAD, k);
duke@435: 
duke@435:     Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0);
duke@435: 
duke@435:     JavaValue result(T_OBJECT);
duke@435:     JavaCallArguments args;
duke@435:     args.push_oop(mgr_name);    // Argument 1
duke@435: 
duke@435:     symbolHandle method_name;
duke@435:     symbolHandle signature;
duke@435:     if (is_gc_memory_manager()) {
duke@435:       method_name = vmSymbolHandles::createGarbageCollector_name();
duke@435:       signature = vmSymbolHandles::createGarbageCollector_signature();
duke@435:       args.push_oop(Handle());      // Argument 2 (for future extension)
duke@435:     } else {
duke@435:       method_name = vmSymbolHandles::createMemoryManager_name();
duke@435:       signature = vmSymbolHandles::createMemoryManager_signature();
duke@435:     }
duke@435: 
duke@435:     JavaCalls::call_static(&result,
duke@435:                            ik,
duke@435:                            method_name,
duke@435:                            signature,
duke@435:                            &args,
duke@435:                            CHECK_0);
duke@435: 
duke@435:     instanceOop m = (instanceOop) result.get_jobject();
duke@435:     instanceHandle mgr(THREAD, m);
duke@435: 
duke@435:     {
duke@435:       // Get lock before setting _memory_mgr_obj
duke@435:       // since another thread may have created the instance
duke@435:       MutexLocker ml(Management_lock);
duke@435: 
duke@435:       // Check if another thread has created the management object.  We reload
duke@435:       // _memory_mgr_obj here because some other thread may have initialized
duke@435:       // it while we were executing the code before the lock.
duke@435:       //
duke@435:       // The lock has done an acquire, so the load can't float above it, but
duke@435:       // we need to do a load_acquire as above.
duke@435:       mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj);
duke@435:       if (mgr_obj != NULL) {
duke@435:          return mgr_obj;
duke@435:       }
duke@435: 
duke@435:       // Get the address of the object we created via call_special.
duke@435:       mgr_obj = mgr();
duke@435: 
duke@435:       // Use store barrier to make sure the memory accesses associated
duke@435:       // with creating the management object are visible before publishing
duke@435:       // its address.  The unlock will publish the store to _memory_mgr_obj
duke@435:       // because it does a release first.
duke@435:       OrderAccess::release_store_ptr(&_memory_mgr_obj, mgr_obj);
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   return mgr_obj;
duke@435: }
duke@435: 
duke@435: void MemoryManager::oops_do(OopClosure* f) {
duke@435:   f->do_oop((oop*) &_memory_mgr_obj);
duke@435: }
duke@435: 
duke@435: GCStatInfo::GCStatInfo(int num_pools) {
duke@435:   // initialize the arrays for memory usage
duke@435:   _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools);
duke@435:   _after_gc_usage_array  = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools);
duke@435:   size_t len = num_pools * sizeof(MemoryUsage);
duke@435:   memset(_before_gc_usage_array, 0, len);
duke@435:   memset(_after_gc_usage_array, 0, len);
duke@435:   _usage_array_size = num_pools;
duke@435: }
duke@435: 
duke@435: GCStatInfo::~GCStatInfo() {
duke@435:   FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array);
duke@435:   FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array);
duke@435: }
duke@435: 
duke@435: void GCStatInfo::copy_stat(GCStatInfo* stat) {
duke@435:   set_index(stat->gc_index());
duke@435:   set_start_time(stat->start_time());
duke@435:   set_end_time(stat->end_time());
duke@435:   assert(_usage_array_size == stat->usage_array_size(), "Must have same array size");
duke@435:   for (int i = 0; i < _usage_array_size; i++) {
duke@435:     set_before_gc_usage(i, stat->before_gc_usage_for_pool(i));
duke@435:     set_after_gc_usage(i, stat->after_gc_usage_for_pool(i));
duke@435:   }
duke@435: }
duke@435: 
duke@435: void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) {
duke@435:   MemoryUsage* gc_usage_array;
duke@435:   if (before_gc) {
duke@435:     gc_usage_array = _before_gc_usage_array;
duke@435:   } else {
duke@435:     gc_usage_array = _after_gc_usage_array;
duke@435:   }
duke@435:   gc_usage_array[pool_index] = usage;
duke@435: }
duke@435: 
duke@435: GCMemoryManager::GCMemoryManager() : MemoryManager() {
duke@435:   _num_collections = 0;
duke@435:   _last_gc_stat = NULL;
duke@435:   _num_gc_threads = 1;
duke@435: }
duke@435: 
duke@435: GCMemoryManager::~GCMemoryManager() {
duke@435:   delete _last_gc_stat;
duke@435: }
duke@435: 
duke@435: void GCMemoryManager::initialize_gc_stat_info() {
duke@435:   assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
duke@435:   _last_gc_stat = new GCStatInfo(MemoryService::num_memory_pools());
duke@435: }
duke@435: 
duke@435: void GCMemoryManager::gc_begin() {
duke@435:   assert(_last_gc_stat != NULL, "Just checking");
duke@435:   _accumulated_timer.start();
duke@435:   _num_collections++;
duke@435:   _last_gc_stat->set_index(_num_collections);
duke@435:   _last_gc_stat->set_start_time(Management::timestamp());
duke@435: 
duke@435:   // Keep memory usage of all memory pools
duke@435:   for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
duke@435:     MemoryPool* pool = MemoryService::get_memory_pool(i);
duke@435:     MemoryUsage usage = pool->get_memory_usage();
duke@435:     _last_gc_stat->set_before_gc_usage(i, usage);
duke@435:     HS_DTRACE_PROBE8(hotspot, mem__pool__gc__begin,
duke@435:       name(), strlen(name()),
duke@435:       pool->name(), strlen(pool->name()),
duke@435:       usage.init_size(), usage.used(),
duke@435:       usage.committed(), usage.max_size());
duke@435:   }
duke@435: }
duke@435: 
duke@435: void GCMemoryManager::gc_end() {
duke@435:   _accumulated_timer.stop();
duke@435:   _last_gc_stat->set_end_time(Management::timestamp());
duke@435: 
duke@435:   int i;
duke@435:   // keep the last gc statistics for all memory pools
duke@435:   for (i = 0; i < MemoryService::num_memory_pools(); i++) {
duke@435:     MemoryPool* pool = MemoryService::get_memory_pool(i);
duke@435:     MemoryUsage usage = pool->get_memory_usage();
duke@435: 
duke@435:     HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end,
duke@435:       name(), strlen(name()),
duke@435:       pool->name(), strlen(pool->name()),
duke@435:       usage.init_size(), usage.used(),
duke@435:       usage.committed(), usage.max_size());
duke@435: 
duke@435:     _last_gc_stat->set_after_gc_usage(i, usage);
duke@435:   }
duke@435: 
duke@435:   // Set last collection usage of the memory pools managed by this collector
duke@435:   for (i = 0; i < num_memory_pools(); i++) {
duke@435:     MemoryPool* pool = get_memory_pool(i);
duke@435:     MemoryUsage usage = pool->get_memory_usage();
duke@435: 
duke@435:     // Compare with GC usage threshold
duke@435:     pool->set_last_collection_usage(usage);
duke@435:     LowMemoryDetector::detect_after_gc_memory(pool);
duke@435:   }
duke@435: }