1 /*
   2  * Copyright (c) 2007, 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 "gc/parallel/psMemoryPool.hpp"
  27 
  28 PSGenerationPool::PSGenerationPool(PSOldGen* old_gen,
  29                                    const char* name,
  30                                    bool support_usage_threshold) :
  31   CollectedMemoryPool(name, old_gen->capacity_in_bytes(),
  32                       old_gen->reserved().byte_size(), support_usage_threshold), _old_gen(old_gen) {
  33 }
  34 
  35 MemoryUsage PSGenerationPool::get_memory_usage() {
  36   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
  37   size_t used      = used_in_bytes();
  38   size_t committed = _old_gen->capacity_in_bytes();
  39 
  40   return MemoryUsage(initial_size(), used, committed, maxSize);
  41 }
  42 
  43 // The max size of EdenMutableSpacePool =
  44 //     max size of the PSYoungGen - capacity of two survivor spaces
  45 //
  46 // Max size of PS eden space is changing due to ergonomic.
  47 // PSYoungGen, PSOldGen, Eden, Survivor spaces are all resizable.
  48 //
  49 EdenMutableSpacePool::EdenMutableSpacePool(PSYoungGen* young_gen,
  50                                            MutableSpace* space,
  51                                            const char* name,
  52                                            bool support_usage_threshold) :
  53   CollectedMemoryPool(name, space->capacity_in_bytes(),
  54                       (young_gen->max_size() - young_gen->from_space()->capacity_in_bytes() - young_gen->to_space()->capacity_in_bytes()),
  55                        support_usage_threshold),
  56   _young_gen(young_gen),
  57   _space(space) {
  58 }
  59 
  60 MemoryUsage EdenMutableSpacePool::get_memory_usage() {
  61   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
  62   size_t used = used_in_bytes();
  63   size_t committed = _space->capacity_in_bytes();
  64 
  65   return MemoryUsage(initial_size(), used, committed, maxSize);
  66 }
  67 
  68 // The max size of SurvivorMutableSpacePool =
  69 //     current capacity of the from-space
  70 //
  71 // PS from and to survivor spaces could have different sizes.
  72 //
  73 SurvivorMutableSpacePool::SurvivorMutableSpacePool(PSYoungGen* young_gen,
  74                                                    const char* name,
  75                                                    bool support_usage_threshold) :
  76   CollectedMemoryPool(name, young_gen->from_space()->capacity_in_bytes(),
  77                       young_gen->from_space()->capacity_in_bytes(),
  78                       support_usage_threshold), _young_gen(young_gen) {
  79 }
  80 
  81 MemoryUsage SurvivorMutableSpacePool::get_memory_usage() {
  82   size_t maxSize = (available_for_allocation() ? max_size() : 0);
  83   size_t used    = used_in_bytes();
  84   size_t committed = committed_in_bytes();
  85   return MemoryUsage(initial_size(), used, committed, maxSize);
  86 }