1 /*
   2  * Copyright (c) 2013, 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.
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  23  */
  24 
  25 #ifndef SHARE_GC_G1_G1REMSETSUMMARY_HPP
  26 #define SHARE_GC_G1_G1REMSETSUMMARY_HPP
  27 
  28 #include "utilities/globalDefinitions.hpp"
  29 #include "utilities/ostream.hpp"
  30 
  31 class G1RemSet;
  32 
  33 // A G1RemSetSummary manages statistical information about the G1RemSet
  34 
  35 class G1RemSetSummary {
  36 private:
  37   friend class GetRSThreadVTimeClosure;
  38 
  39   size_t _total_mutator_refined_cards;
  40   size_t _total_concurrent_refined_cards;
  41 
  42   size_t _num_coarsenings;
  43 
  44   size_t _num_vtimes;
  45   double* _rs_threads_vtimes;
  46 
  47   double _sampling_thread_vtime;
  48 
  49   void set_rs_thread_vtime(uint thread, double value);
  50   void set_sampling_thread_vtime(double value) {
  51     _sampling_thread_vtime = value;
  52   }
  53 
  54   // update this summary with current data from various places
  55   void update();
  56 
  57 public:
  58   G1RemSetSummary(bool should_update = true);
  59 
  60   ~G1RemSetSummary();
  61 
  62   // set the counters in this summary to the values of the others
  63   void set(G1RemSetSummary* other);
  64   // subtract all counters from the other summary, and set them in the current
  65   void subtract_from(G1RemSetSummary* other);
  66 
  67   void print_on(outputStream* out);
  68 
  69   double rs_thread_vtime(uint thread) const;
  70 
  71   double sampling_thread_vtime() const {
  72     return _sampling_thread_vtime;
  73   }
  74 
  75   size_t total_mutator_refined_cards() const {
  76     return _total_mutator_refined_cards;
  77   }
  78 
  79   size_t total_concurrent_refined_cards() const {
  80     return _total_concurrent_refined_cards;
  81   }
  82 
  83   size_t total_refined_cards() const {
  84     return total_mutator_refined_cards() + total_concurrent_refined_cards();
  85   }
  86 
  87   size_t num_coarsenings() const {
  88     return _num_coarsenings;
  89   }
  90 };
  91 
  92 #endif // SHARE_GC_G1_G1REMSETSUMMARY_HPP