1 /*
   2  * Copyright (c) 2007, 2015, 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 "oops/oop.inline.hpp"
  29 #include "runtime/handles.inline.hpp"
  30 #include "runtime/javaCalls.hpp"
  31 #include "services/lowMemoryDetector.hpp"
  32 #include "services/management.hpp"
  33 #include "services/memoryManager.hpp"
  34 #include "services/psMemoryPool.hpp"
  35 
  36 PSGenerationPool::PSGenerationPool(PSOldGen* old_gen,
  37                                    const char* name,
  38                                    PoolType type,
  39                                    bool support_usage_threshold) :
  40   CollectedMemoryPool(name, type, old_gen->capacity_in_bytes(),
  41                       old_gen->reserved().byte_size(), support_usage_threshold), _old_gen(old_gen) {
  42 }
  43 
  44 MemoryUsage PSGenerationPool::get_memory_usage() {
  45   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
  46   size_t used      = used_in_bytes();
  47   size_t committed = _old_gen->capacity_in_bytes();
  48 
  49   return MemoryUsage(initial_size(), used, committed, maxSize);
  50 }
  51 
  52 // The max size of EdenMutableSpacePool =
  53 //     max size of the PSYoungGen - capacity of two survivor spaces
  54 //
  55 // Max size of PS eden space is changing due to ergonomic.
  56 // PSYoungGen, PSOldGen, Eden, Survivor spaces are all resizable.
  57 //
  58 EdenMutableSpacePool::EdenMutableSpacePool(PSYoungGen* young_gen,
  59                                            MutableSpace* space,
  60                                            const char* name,
  61                                            PoolType type,
  62                                            bool support_usage_threshold) :
  63   CollectedMemoryPool(name, type, space->capacity_in_bytes(),
  64                       (young_gen->max_size() - young_gen->from_space()->capacity_in_bytes() - young_gen->to_space()->capacity_in_bytes()),
  65                        support_usage_threshold),
  66   _young_gen(young_gen),
  67   _space(space) {
  68 }
  69 
  70 MemoryUsage EdenMutableSpacePool::get_memory_usage() {
  71   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
  72   size_t used = used_in_bytes();
  73   size_t committed = _space->capacity_in_bytes();
  74 
  75   return MemoryUsage(initial_size(), used, committed, maxSize);
  76 }
  77 
  78 // The max size of SurvivorMutableSpacePool =
  79 //     current capacity of the from-space
  80 //
  81 // PS from and to survivor spaces could have different sizes.
  82 //
  83 SurvivorMutableSpacePool::SurvivorMutableSpacePool(PSYoungGen* young_gen,
  84                                                    const char* name,
  85                                                    PoolType type,
  86                                                    bool support_usage_threshold) :
  87   CollectedMemoryPool(name, type, young_gen->from_space()->capacity_in_bytes(),
  88                       young_gen->from_space()->capacity_in_bytes(),
  89                       support_usage_threshold), _young_gen(young_gen) {
  90 }
  91 
  92 MemoryUsage SurvivorMutableSpacePool::get_memory_usage() {
  93   size_t maxSize = (available_for_allocation() ? max_size() : 0);
  94   size_t used    = used_in_bytes();
  95   size_t committed = committed_in_bytes();
  96   return MemoryUsage(initial_size(), used, committed, maxSize);
  97 }