1 /*
   2  * Copyright (c) 2013, 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_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP
  26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP
  27 
  28 #include "utilities/ostream.hpp"
  29 
  30 class G1RemSet;
  31 
  32 // A G1RemSetSummary manages statistical information about the G1RemSet
  33 
  34 class G1RemSetSummary VALUE_OBJ_CLASS_SPEC {
  35 private:
  36   friend class GetRSThreadVTimeClosure;
  37 
  38   G1RemSet * _remset;
  39 
  40   G1RemSet * remset() const {
  41     return _remset;
  42   }
  43 
  44   size_t _num_refined_cards;
  45   size_t _num_processed_buf_mutator;
  46   size_t _num_processed_buf_rs_threads;
  47 
  48   size_t _num_coarsenings;
  49 
  50   double * _rs_threads_vtimes;
  51   size_t _num_vtimes;
  52 
  53   double _sampling_thread_vtime;
  54 
  55   void set_rs_thread_vtime(uint thread, double value);
  56   void set_sampling_thread_vtime(double value) {
  57     _sampling_thread_vtime = value;
  58   }
  59 
  60   void free_and_null() {
  61     if (_rs_threads_vtimes) {
  62       FREE_C_HEAP_ARRAY(double, _rs_threads_vtimes, mtGC);
  63       _rs_threads_vtimes = NULL;
  64       _num_vtimes = 0;
  65     }
  66   }
  67 
  68   // update this summary with current data from various places
  69   void update();
  70 
  71 public:
  72   G1RemSetSummary() : _remset(NULL), _num_refined_cards(0),
  73     _num_processed_buf_mutator(0), _num_processed_buf_rs_threads(0), _num_coarsenings(0),
  74     _rs_threads_vtimes(NULL), _num_vtimes(0), _sampling_thread_vtime(0.0f) {
  75   }
  76 
  77   ~G1RemSetSummary() {
  78     free_and_null();
  79   }
  80 
  81   // set the counters in this summary to the values of the others
  82   void set(G1RemSetSummary * other);
  83   // subtract all counters from the other summary, and set them in the current
  84   void subtract_from(G1RemSetSummary * other);
  85 
  86   // initialize and get the first sampling
  87   void initialize(G1RemSet * remset, uint num_workers);
  88 
  89   void print_on(outputStream * out);
  90 
  91   double rs_thread_vtime(uint thread) const;
  92 
  93   double sampling_thread_vtime() const {
  94     return _sampling_thread_vtime;
  95   }
  96 
  97   size_t num_concurrent_refined_cards() const {
  98     return _num_refined_cards;
  99   }
 100 
 101   size_t num_processed_buf_mutator() const {
 102     return _num_processed_buf_mutator;
 103   }
 104 
 105   size_t num_processed_buf_rs_threads() const {
 106     return _num_processed_buf_rs_threads;
 107   }
 108 
 109   size_t num_processed_buf_total() const {
 110     return num_processed_buf_mutator() + num_processed_buf_rs_threads();
 111   }
 112 
 113   size_t num_coarsenings() const {
 114     return _num_coarsenings;
 115   }
 116 };
 117 
 118 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP