1 /*
   2  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2020 SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP
  27 #define SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP
  28 
  29 #include "memory/allocation.hpp"
  30 #include "memory/metaspace/counter.hpp"
  31 
  32 namespace metaspace {
  33 
  34 // This class is a convenience interface for accessing global metaspace counters.
  35 class RunningCounters : public AllStatic {
  36 
  37   static SizeAtomicCounter _used_class_counter;
  38   static SizeAtomicCounter _used_nonclass_counter;
  39 
  40 public:
  41 
  42   // ---- virtual memory -----
  43 
  44   // Return reserved size, in words, for Metaspace
  45   static size_t reserved_words();
  46   static size_t reserved_words_class();
  47   static size_t reserved_words_nonclass();
  48 
  49   // Return total committed size, in words, for Metaspace
  50   static size_t committed_words();
  51   static size_t committed_words_class();
  52   static size_t committed_words_nonclass();
  53 
  54 
  55   // ---- used chunks -----
  56 
  57   // Returns size, in words, used for metadata.
  58   static size_t used_words();
  59   static size_t used_words_class();
  60   static size_t used_words_nonclass();
  61 
  62   // ---- free chunks -----
  63 
  64   // Returns size, in words, of all chunks in all freelists.
  65   static size_t free_chunks_words();
  66   static size_t free_chunks_words_class();
  67   static size_t free_chunks_words_nonclass();
  68 
  69   // Direct access to the counters.
  70   static SizeAtomicCounter* used_nonclass_counter()     { return &_used_nonclass_counter; }
  71   static SizeAtomicCounter* used_class_counter()        { return &_used_class_counter; }
  72 
  73 };
  74 
  75 } // namespace metaspace
  76 
  77 #endif // SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP
  78 
  79