1 /*
   2  * Copyright (c) 2013, 2020, 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
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  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   size_t _num_coarsenings;
  37 
  38   size_t _num_vtimes;
  39   double* _rs_threads_vtimes;
  40 
  41   double _sampling_thread_vtime;
  42 
  43   void set_rs_thread_vtime(uint thread, double value);
  44   void set_sampling_thread_vtime(double value) {
  45     _sampling_thread_vtime = value;
  46   }
  47 
  48   // update this summary with current data from various places
  49   void update();
  50 
  51 public:
  52   G1RemSetSummary(bool should_update = true);
  53 
  54   ~G1RemSetSummary();
  55 
  56   // set the counters in this summary to the values of the others
  57   void set(G1RemSetSummary* other);
  58   // subtract all counters from the other summary, and set them in the current
  59   void subtract_from(G1RemSetSummary* other);
  60 
  61   void print_on(outputStream* out);
  62 
  63   double rs_thread_vtime(uint thread) const;
  64 
  65   double sampling_thread_vtime() const {
  66     return _sampling_thread_vtime;
  67   }
  68 
  69   size_t num_coarsenings() const {
  70     return _num_coarsenings;
  71   }
  72 };
  73 
  74 #endif // SHARE_GC_G1_G1REMSETSUMMARY_HPP