Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * 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);

   }

 }