1 /*
   2  * Copyright (c) 2002, 2005, 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 // GCPolicyCounters is a holder class for performance counters
  26 // that track a generation
  27 
  28 class GCPolicyCounters: public CHeapObj {
  29   friend class VMStructs;
  30 
  31   private:
  32 
  33     // Constant PerfData types don't need to retain a reference.
  34     // However, it's a good idea to document them here.
  35     // PerfStringConstant*     _name;
  36     // PerfStringConstant*     _collector_size;
  37     // PerfStringConstant*     _generation_size;
  38 
  39     PerfVariable*     _tenuring_threshold;
  40     PerfVariable*     _desired_survivor_size;
  41 
  42     const char* _name_space;
  43 
  44  public:
  45 
  46   enum Name {
  47     NONE,
  48     GCPolicyCountersKind,
  49     GCAdaptivePolicyCountersKind,
  50     PSGCAdaptivePolicyCountersKind,
  51     CMSGCAdaptivePolicyCountersKind
  52   };
  53 
  54   GCPolicyCounters(const char* name, int collectors, int generations);
  55 
  56     inline PerfVariable* tenuring_threshold() const  {
  57       return _tenuring_threshold;
  58     }
  59 
  60     inline PerfVariable* desired_survivor_size() const  {
  61       return _desired_survivor_size;
  62     }
  63 
  64     const char* name_space() const { return _name_space; }
  65 
  66     virtual void update_counters() {}
  67 
  68     virtual GCPolicyCounters::Name kind() const {
  69       return GCPolicyCounters::GCPolicyCountersKind;
  70     }
  71 };