1 /*
   2  * Copyright (c) 2007, 2010, 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 "gc_implementation/parallelScavenge/psPermGen.hpp"
  29 #include "oops/oop.inline.hpp"
  30 #include "runtime/handles.inline.hpp"
  31 #include "runtime/javaCalls.hpp"
  32 #include "services/lowMemoryDetector.hpp"
  33 #include "services/management.hpp"
  34 #include "services/memoryManager.hpp"
  35 #include "services/psMemoryPool.hpp"
  36 
  37 PSGenerationPool::PSGenerationPool(PSOldGen* gen,
  38                                    const char* name,
  39                                    PoolType type,
  40                                    bool support_usage_threshold) :
  41   CollectedMemoryPool(name, type, gen->capacity_in_bytes(),
  42                       gen->reserved().byte_size(), support_usage_threshold), _gen(gen) {
  43 }
  44 
  45 PSGenerationPool::PSGenerationPool(PSPermGen* gen,
  46                                    const char* name,
  47                                    PoolType type,
  48                                    bool support_usage_threshold) :
  49   CollectedMemoryPool(name, type, gen->capacity_in_bytes(),
  50                       gen->reserved().byte_size(), support_usage_threshold), _gen(gen) {
  51 }
  52 
  53 MemoryUsage PSGenerationPool::get_memory_usage() {
  54   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
  55   size_t used      = used_in_bytes();
  56   size_t committed = _gen->capacity_in_bytes();
  57 
  58   return MemoryUsage(initial_size(), used, committed, maxSize);
  59 }
  60 
  61 // The max size of EdenMutableSpacePool =
  62 //     max size of the PSYoungGen - capacity of two survivor spaces
  63 //
  64 // Max size of PS eden space is changing due to ergonomic.
  65 // PSYoungGen, PSOldGen, Eden, Survivor spaces are all resizable.
  66 //
  67 EdenMutableSpacePool::EdenMutableSpacePool(PSYoungGen* gen,
  68                                            MutableSpace* space,
  69                                            const char* name,
  70                                            PoolType type,
  71                                            bool support_usage_threshold) :
  72   CollectedMemoryPool(name, type, space->capacity_in_bytes(),
  73                       (gen->max_size() - gen->from_space()->capacity_in_bytes() - gen->to_space()->capacity_in_bytes()),
  74                        support_usage_threshold),
  75   _gen(gen), _space(space) {
  76 }
  77 
  78 MemoryUsage EdenMutableSpacePool::get_memory_usage() {
  79   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
  80   size_t used = used_in_bytes();
  81   size_t committed = _space->capacity_in_bytes();
  82 
  83   return MemoryUsage(initial_size(), used, committed, maxSize);
  84 }
  85 
  86 // The max size of SurvivorMutableSpacePool =
  87 //     current capacity of the from-space
  88 //
  89 // PS from and to survivor spaces could have different sizes.
  90 //
  91 SurvivorMutableSpacePool::SurvivorMutableSpacePool(PSYoungGen* gen,
  92                                                    const char* name,
  93                                                    PoolType type,
  94                                                    bool support_usage_threshold) :
  95   CollectedMemoryPool(name, type, gen->from_space()->capacity_in_bytes(),
  96                       gen->from_space()->capacity_in_bytes(),
  97                       support_usage_threshold), _gen(gen) {
  98 }
  99 
 100 MemoryUsage SurvivorMutableSpacePool::get_memory_usage() {
 101   size_t maxSize = (available_for_allocation() ? max_size() : 0);
 102   size_t used    = used_in_bytes();
 103   size_t committed = committed_in_bytes();
 104   return MemoryUsage(initial_size(), used, committed, maxSize);
 105 }