1 /*
   2  * Copyright (c) 2007, 2019, 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
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  23  */
  24 
  25 #ifndef SHARE_GC_PARALLEL_PSMEMORYPOOL_HPP
  26 #define SHARE_GC_PARALLEL_PSMEMORYPOOL_HPP
  27 
  28 #include "gc/parallel/mutableSpace.hpp"
  29 #include "gc/parallel/psOldGen.hpp"
  30 #include "gc/parallel/psYoungGen.hpp"
  31 #include "services/memoryPool.hpp"
  32 #include "services/memoryUsage.hpp"
  33 
  34 class PSGenerationPool : public CollectedMemoryPool {
  35 private:
  36   PSOldGen* _old_gen;
  37 
  38 public:
  39   PSGenerationPool(PSOldGen* pool, const char* name, bool support_usage_threshold);
  40 
  41   MemoryUsage get_memory_usage();
  42   size_t used_in_bytes() { return _old_gen->used_in_bytes(); }
  43   size_t max_size() const { return _old_gen->reserved().byte_size(); }
  44 };
  45 
  46 class EdenMutableSpacePool : public CollectedMemoryPool {
  47 private:
  48   PSYoungGen*   _young_gen;
  49   MutableSpace* _space;
  50 
  51 public:
  52   EdenMutableSpacePool(PSYoungGen* young_gen,
  53                        MutableSpace* space,
  54                        const char* name,
  55                        bool support_usage_threshold);
  56 
  57   MutableSpace* space()                     { return _space; }
  58   MemoryUsage get_memory_usage();
  59   size_t used_in_bytes()                    { return space()->used_in_bytes(); }
  60   size_t max_size() const {
  61     // Eden's max_size = max_size of Young Gen - the current committed size of survivor spaces
  62     return _young_gen->max_size() - _young_gen->from_space()->capacity_in_bytes() - _young_gen->to_space()->capacity_in_bytes();
  63   }
  64 };
  65 
  66 class SurvivorMutableSpacePool : public CollectedMemoryPool {
  67 private:
  68   PSYoungGen*   _young_gen;
  69 
  70 public:
  71   SurvivorMutableSpacePool(PSYoungGen* young_gen,
  72                            const char* name,
  73                            bool support_usage_threshold);
  74 
  75   MemoryUsage get_memory_usage();
  76 
  77   size_t used_in_bytes() {
  78     return _young_gen->from_space()->used_in_bytes();
  79   }
  80   size_t committed_in_bytes() {
  81     return _young_gen->from_space()->capacity_in_bytes();
  82   }
  83   size_t max_size() const {
  84     // Return current committed size of the from-space
  85     return _young_gen->from_space()->capacity_in_bytes();
  86   }
  87 };
  88 
  89 #endif // SHARE_GC_PARALLEL_PSMEMORYPOOL_HPP