1 /*

     2  * Copyright (c) 2013, 2015, 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_G1_G1REMSETSUMMARY_HPP

    26 #define SHARE_VM_GC_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);

    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);

    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_G1_G1REMSETSUMMARY_HPP