1 /*
   2  * Copyright (c) 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
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_UTILITIES_TABLE_STATISTICS_HPP
  26 #define SHARE_UTILITIES_TABLE_STATISTICS_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "utilities/debug.hpp"
  30 #include "utilities/globalDefinitions.hpp"
  31 #include "utilities/numberSeq.hpp"
  32 
  33 class TableRateStatistics : CHeapObj<mtStatistics> {
  34 
  35   friend class TableStatistics;
  36 
  37 private:
  38   volatile size_t _added_items;
  39   volatile size_t _removed_items;
  40 
  41   jlong _time_stamp;
  42   double _seconds_stamp;
  43   size_t _added_items_stamp;
  44   size_t _added_items_stamp_prev;
  45   size_t _removed_items_stamp;
  46   size_t _removed_items_stamp_prev;
  47 
  48 public:
  49   TableRateStatistics();
  50   ~TableRateStatistics();
  51 
  52   void add();
  53   void remove();
  54 
  55 protected:
  56   void stamp();
  57   float get_add_rate();
  58   float get_remove_rate();
  59 };
  60 
  61 class TableStatistics : CHeapObj<mtStatistics> {
  62 
  63 public:
  64   size_t _literal_bytes;
  65 
  66   size_t _number_of_buckets;
  67   size_t _number_of_entries;
  68 
  69   size_t _maximum_bucket_size;
  70   float _average_bucket_size;
  71   float _variance_of_bucket_size;
  72   float _stddev_of_bucket_size;
  73 
  74   size_t _bucket_bytes;
  75   size_t _entry_bytes;
  76   size_t _total_footprint;
  77 
  78   size_t _bucket_size;
  79   size_t _entry_size;
  80 
  81   float _add_rate;
  82   float _remove_rate;
  83 
  84   TableStatistics();
  85   TableStatistics(TableRateStatistics& rate_stats, NumberSeq summary, size_t literal_bytes, size_t bucket_bytes, size_t node_bytes);
  86   ~TableStatistics();
  87 
  88   void print(outputStream* st, const char *table_name);
  89 };
  90 
  91 #endif // SHARE_UTILITIES_TABLE_STATISTICS_HPP