rev 48000 : [mq]: open.patch

   1 /*
   2  * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/systemDictionary.hpp"
  27 #include "classfile/vmSymbols.hpp"


  28 #include "memory/metaspace.hpp"
  29 #include "oops/oop.inline.hpp"
  30 #include "runtime/handles.inline.hpp"
  31 #include "runtime/javaCalls.hpp"
  32 #include "runtime/orderAccess.inline.hpp"
  33 #include "services/lowMemoryDetector.hpp"
  34 #include "services/management.hpp"
  35 #include "services/memoryManager.hpp"
  36 #include "services/memoryPool.hpp"
  37 #include "utilities/globalDefinitions.hpp"
  38 #include "utilities/macros.hpp"



  39 
  40 MemoryPool::MemoryPool(const char* name,
  41                        PoolType type,
  42                        size_t init_size,
  43                        size_t max_size,
  44                        bool support_usage_threshold,
  45                        bool support_gc_threshold) {
  46   _name = name;
  47   _initial_size = init_size;
  48   _max_size = max_size;
  49   (void)const_cast<instanceOop&>(_memory_pool_obj = instanceOop(NULL));
  50   _available_for_allocation = true;
  51   _num_managers = 0;
  52   _type = type;
  53 
  54   // initialize the max and init size of collection usage
  55   _after_gc_usage = MemoryUsage(_initial_size, 0, 0, _max_size);
  56 
  57   _usage_sensor = NULL;
  58   _gc_usage_sensor = NULL;
  59   // usage threshold supports both high and low threshold
  60   _usage_threshold = new ThresholdSupport(support_usage_threshold, support_usage_threshold);
  61   // gc usage threshold supports only high threshold
  62   _gc_usage_threshold = new ThresholdSupport(support_gc_threshold, support_gc_threshold);
  63 }
  64 
  65 void MemoryPool::add_manager(MemoryManager* mgr) {
  66   assert(_num_managers < MemoryPool::max_num_managers, "_num_managers exceeds the max");
  67   if (_num_managers < MemoryPool::max_num_managers) {
  68     _managers[_num_managers] = mgr;
  69     _num_managers++;
  70   }
  71 }
  72 
  73 
  74 // Returns an instanceHandle of a MemoryPool object.
  75 // It creates a MemoryPool instance when the first time
  76 // this function is called.
  77 instanceOop MemoryPool::get_memory_pool_instance(TRAPS) {
  78   // Must do an acquire so as to force ordering of subsequent
  79   // loads from anything _memory_pool_obj points to or implies.
  80   instanceOop pool_obj = OrderAccess::load_acquire(&_memory_pool_obj);
  81   if (pool_obj == NULL) {
  82     // It's ok for more than one thread to execute the code up to the locked region.
  83     // Extra pool instances will just be gc'ed.
  84     InstanceKlass* ik = Management::sun_management_ManagementFactoryHelper_klass(CHECK_NULL);
  85 
  86     Handle pool_name = java_lang_String::create_from_str(_name, CHECK_NULL);
  87     jlong usage_threshold_value = (_usage_threshold->is_high_threshold_supported() ? 0 : -1L);
  88     jlong gc_usage_threshold_value = (_gc_usage_threshold->is_high_threshold_supported() ? 0 : -1L);
  89 
  90     JavaValue result(T_OBJECT);
  91     JavaCallArguments args;
  92     args.push_oop(pool_name);           // Argument 1
  93     args.push_int((int) is_heap());     // Argument 2
  94 
  95     Symbol* method_name = vmSymbols::createMemoryPool_name();
  96     Symbol* signature = vmSymbols::createMemoryPool_signature();
  97 
  98     args.push_long(usage_threshold_value);    // Argument 3
  99     args.push_long(gc_usage_threshold_value); // Argument 4
 100 
 101     JavaCalls::call_static(&result,
 102                            ik,
 103                            method_name,
 104                            signature,
 105                            &args,
 106                            CHECK_NULL);
 107 
 108     instanceOop p = (instanceOop) result.get_jobject();
 109     instanceHandle pool(THREAD, p);
 110 
 111     {
 112       // Get lock since another thread may have create the instance
 113       MutexLocker ml(Management_lock);
 114 
 115       // Check if another thread has created the pool.  We reload
 116       // _memory_pool_obj here because some other thread may have
 117       // initialized it while we were executing the code before the lock.
 118       //
 119       // The lock has done an acquire, so the load can't float above it,
 120       // but we need to do a load_acquire as above.
 121       pool_obj = OrderAccess::load_acquire(&_memory_pool_obj);
 122       if (pool_obj != NULL) {
 123          return pool_obj;
 124       }
 125 
 126       // Get the address of the object we created via call_special.
 127       pool_obj = pool();
 128 
 129       // Use store barrier to make sure the memory accesses associated
 130       // with creating the pool are visible before publishing its address.
 131       // The unlock will publish the store to _memory_pool_obj because
 132       // it does a release first.
 133       OrderAccess::release_store(&_memory_pool_obj, pool_obj);
 134     }
 135   }
 136 
 137   return pool_obj;
 138 }
 139 
 140 inline static size_t get_max_value(size_t val1, size_t val2) {
 141     return (val1 > val2 ? val1 : val2);
 142 }
 143 
 144 void MemoryPool::record_peak_memory_usage() {
 145   // Caller in JDK is responsible for synchronization -
 146   // acquire the lock for this memory pool before calling VM
 147   MemoryUsage usage = get_memory_usage();
 148   size_t peak_used = get_max_value(usage.used(), _peak_usage.used());
 149   size_t peak_committed = get_max_value(usage.committed(), _peak_usage.committed());
 150   size_t peak_max_size = get_max_value(usage.max_size(), _peak_usage.max_size());
 151 
 152   _peak_usage = MemoryUsage(initial_size(), peak_used, peak_committed, peak_max_size);
 153 }
 154 
 155 static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) {
 156   assert(*sensor_ptr == NULL, "Should be called only once");
 157   SensorInfo* sensor = new SensorInfo();
 158   sensor->set_sensor(sh());
 159   *sensor_ptr = sensor;
 160 }
 161 
 162 void MemoryPool::set_usage_sensor_obj(instanceHandle sh) {
 163   set_sensor_obj_at(&_usage_sensor, sh);
 164 }
 165 
 166 void MemoryPool::set_gc_usage_sensor_obj(instanceHandle sh) {
 167   set_sensor_obj_at(&_gc_usage_sensor, sh);
 168 }
 169 
 170 void MemoryPool::oops_do(OopClosure* f) {
 171   f->do_oop((oop*) &_memory_pool_obj);
 172   if (_usage_sensor != NULL) {
 173     _usage_sensor->oops_do(f);
 174   }
 175   if (_gc_usage_sensor != NULL) {
 176     _gc_usage_sensor->oops_do(f);
 177   }

























































































 178 }
 179 
 180 CodeHeapPool::CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold) :
 181   MemoryPool(name, NonHeap, codeHeap->capacity(), codeHeap->max_capacity(),
 182              support_usage_threshold, false), _codeHeap(codeHeap) {
 183 }
 184 
 185 MemoryUsage CodeHeapPool::get_memory_usage() {
 186   size_t used      = used_in_bytes();
 187   size_t committed = _codeHeap->capacity();
 188   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
 189 
 190   return MemoryUsage(initial_size(), used, committed, maxSize);
 191 }
 192 
 193 MetaspacePool::MetaspacePool() :
 194   MemoryPool("Metaspace", NonHeap, 0, calculate_max_size(), true, false) { }
 195 
 196 MemoryUsage MetaspacePool::get_memory_usage() {
 197   size_t committed = MetaspaceAux::committed_bytes();
 198   return MemoryUsage(initial_size(), used_in_bytes(), committed, max_size());
 199 }
 200 
 201 size_t MetaspacePool::used_in_bytes() {
 202   return MetaspaceAux::used_bytes();
 203 }
 204 
 205 size_t MetaspacePool::calculate_max_size() const {
 206   return FLAG_IS_CMDLINE(MaxMetaspaceSize) ? MaxMetaspaceSize :
 207                                              MemoryUsage::undefined_size();
 208 }
 209 
 210 CompressedKlassSpacePool::CompressedKlassSpacePool() :
 211   MemoryPool("Compressed Class Space", NonHeap, 0, CompressedClassSpaceSize, true, false) { }
 212 
 213 size_t CompressedKlassSpacePool::used_in_bytes() {
 214   return MetaspaceAux::used_bytes(Metaspace::ClassType);
 215 }
 216 
 217 MemoryUsage CompressedKlassSpacePool::get_memory_usage() {
 218   size_t committed = MetaspaceAux::committed_bytes(Metaspace::ClassType);
 219   return MemoryUsage(initial_size(), used_in_bytes(), committed, max_size());
 220 }
--- EOF ---