jdk8-mips64-public/hotspot: src/share/vm/services/memoryPool.cpp@f90c822e73f8 (annotated)

src/share/vm/services/memoryPool.cpp@f90c822e73f8 (annotated)

src/share/vm/services/memoryPool.cpp

Wed, 27 Apr 2016 01:25:04 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:25:04 +0800
changeset 0: f90c822e73f8
child 6876: 710a3c8b516e
permissions: -rw-r--r--

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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

 /*
  * 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 "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());
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/memoryPool.cpp@f90c822e73f8 (annotated)

src/share/vm/services/memoryPool.cpp