1 /*
   2  * Copyright (c) 2002, 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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  24 
  25 #ifndef SHARE_GC_SHARED_GCPOLICYCOUNTERS_HPP
  26 #define SHARE_GC_SHARED_GCPOLICYCOUNTERS_HPP
  27 
  28 #include "runtime/perfData.hpp"
  29 
  30 // GCPolicyCounters is a holder class for performance counters
  31 // that track a generation
  32 
  33 class GCPolicyCounters: public CHeapObj<mtGC> {
  34   friend class VMStructs;
  35 
  36   // Constant PerfData types don't need to retain a reference.
  37   // However, it's a good idea to document them here.
  38   // PerfStringConstant* _name;
  39   // PerfStringConstant* _collector_size;
  40   // PerfStringConstant* _generation_size;
  41 
  42   PerfVariable* _tenuring_threshold;
  43   PerfVariable* _desired_survivor_size;
  44 
  45   const char* _name_space;
  46 
  47 public:
  48   enum Name {
  49     NONE,
  50     GCPolicyCountersKind,
  51     GCAdaptivePolicyCountersKind,
  52     PSGCAdaptivePolicyCountersKind
  53   };
  54 
  55   GCPolicyCounters(const char* name, int collectors, int generations);
  56 
  57   inline PerfVariable* tenuring_threshold() const  {
  58     return _tenuring_threshold;
  59   }
  60 
  61   inline PerfVariable* desired_survivor_size() const  {
  62     return _desired_survivor_size;
  63   }
  64 
  65   const char* name_space() const { return _name_space; }
  66 
  67   virtual void update_counters() {}
  68 
  69   virtual GCPolicyCounters::Name kind() const {
  70     return GCPolicyCounters::GCPolicyCountersKind;
  71   }
  72 };
  73 
  74 #endif // SHARE_GC_SHARED_GCPOLICYCOUNTERS_HPP