1 /*
   2  * Copyright (c) 2003, 2006, 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 class GCStats : public CHeapObj {
  26  protected:
  27   // Avg amount promoted; used for avoiding promotion undo
  28   // This class does not update deviations if the sample is zero.
  29   AdaptivePaddedNoZeroDevAverage*   _avg_promoted;
  30 
  31  public:
  32   GCStats();
  33 
  34   enum Name {
  35     GCStatsKind,
  36     CMSGCStatsKind
  37   };
  38 
  39   virtual Name kind() {
  40     return GCStatsKind;
  41   }
  42 
  43   AdaptivePaddedNoZeroDevAverage*  avg_promoted() const { return _avg_promoted; }
  44 
  45   // Average in bytes
  46   size_t average_promoted_in_bytes() const {
  47     return (size_t)_avg_promoted->average();
  48   }
  49 
  50   // Padded average in bytes
  51   size_t padded_average_promoted_in_bytes() const {
  52     return (size_t)_avg_promoted->padded_average();
  53   }
  54 };
  55 
  56 class CMSGCStats : public GCStats {
  57  public:
  58   CMSGCStats();
  59 
  60   virtual Name kind() {
  61     return CMSGCStatsKind;
  62   }
  63 };