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.
  22  *
  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   size_t _total_mutator_refined_cards;
  38   size_t _total_concurrent_refined_cards;
  39 
  40   size_t _num_coarsenings;
  41 
  42   size_t _num_vtimes;
  43   double* _rs_threads_vtimes;
  44 
  45   double _sampling_thread_vtime;
  46 
  47   // Snapshot of counters from G1EpochSynchronizerCounters
  48   size_t _num_fast_sync;
  49   size_t _num_no_handshake_sync;
  50   size_t _num_handshake_sync;
  51   size_t _no_handshake_accum_time_ms;
  52   size_t _handshake_accum_time_ms;
  53   size_t _num_handshake_no_safepoint;
  54   size_t _num_handshake_safepoint;
  55 
  56   void set_rs_thread_vtime(uint thread, double value);
  57   void set_sampling_thread_vtime(double value) {
  58     _sampling_thread_vtime = value;
  59   }
  60 
  61   // update this summary with current data from various places
  62   void update();
  63 
  64 public:
  65   G1RemSetSummary(bool should_update = true);
  66 
  67   ~G1RemSetSummary();
  68 
  69   // set the counters in this summary to the values of the others
  70   void set(G1RemSetSummary* other);
  71   // subtract all counters from the other summary, and set them in the current
  72   void subtract_from(G1RemSetSummary* other);
  73 
  74   void print_on(outputStream* out);
  75 
  76   double rs_thread_vtime(uint thread) const;
  77 
  78   double sampling_thread_vtime() const {
  79     return _sampling_thread_vtime;
  80   }
  81 
  82   size_t total_mutator_refined_cards() const {
  83     return _total_mutator_refined_cards;
  84   }
  85 
  86   size_t total_concurrent_refined_cards() const {
  87     return _total_concurrent_refined_cards;
  88   }
  89 
  90   size_t total_refined_cards() const {
  91     return total_mutator_refined_cards() + total_concurrent_refined_cards();
  92   }
  93 
  94   size_t num_coarsenings() const {
  95     return _num_coarsenings;
  96   }
  97 
  98   size_t num_fast_sync() const {
  99     return _num_fast_sync;
 100   }
 101 
 102   size_t num_no_handshake_sync() const {
 103     return _num_no_handshake_sync;
 104   }
 105 
 106   size_t num_handshake_sync() const {
 107     return _num_handshake_sync;
 108   }
 109 
 110   size_t no_handshake_accum_time_ms() const {
 111     return _no_handshake_accum_time_ms;
 112   }
 113 
 114   size_t handshake_accum_time_ms() const {
 115     return _handshake_accum_time_ms;
 116   }
 117 
 118   size_t num_handshake_no_safepoint() const {
 119     return _num_handshake_no_safepoint;
 120   }
 121 
 122   size_t num_handshake_safepoint() const {
 123     return _num_handshake_safepoint;
 124   }
 125 };
 126 
 127 #endif // SHARE_GC_G1_G1REMSETSUMMARY_HPP