1 /*

     2  * Copyright (c) 2012, 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_G1GCPHASETIMESLOG_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1GCPHASETIMESLOG_HPP

    27 

    28 #include "memory/allocation.hpp"

    29 #include "gc_interface/gcCause.hpp"

    30 

    31 class G1GCPhaseTimes : public CHeapObj {

    32   friend class G1CollectorPolicy;

    33   friend class TraceGen0TimeData;

    34 

    35  private:

    36   uint _active_gc_threads;

    37   uint _max_gc_threads;

    38 

    39   GCCause::Cause _gc_cause;

    40   bool           _is_young_gc;

    41   bool           _is_initial_mark_gc;

    42 

    43   double _pause_start_time_sec;

    44 

    45   double* _par_last_gc_worker_start_times_ms;

    46   double* _par_last_ext_root_scan_times_ms;

    47   double* _par_last_satb_filtering_times_ms;

    48   double* _par_last_update_rs_times_ms;

    49   double* _par_last_update_rs_processed_buffers;

    50   double* _par_last_scan_rs_times_ms;

    51   double* _par_last_obj_copy_times_ms;

    52   double* _par_last_termination_times_ms;

    53   double* _par_last_termination_attempts;

    54   double* _par_last_gc_worker_end_times_ms;

    55   double* _par_last_gc_worker_times_ms;

    56   double* _par_last_gc_worker_other_times_ms;

    57 

    58   double _cur_collection_par_time_ms;

    59 

    60   double _cur_collection_code_root_fixup_time_ms;

    61 

    62   double _cur_clear_ct_time_ms;

    63   double _cur_ref_proc_time_ms;

    64   double _cur_ref_enq_time_ms;

    65 

    66   // Helper methods for detailed logging

    67   void print_par_stats(int level, const char* str, double* data, bool showDecimals = true);

    68   void print_stats(int level, const char* str, double value);

    69   void print_stats(int level, const char* str, double value, int workers);

    70   void print_stats(int level, const char* str, int value);

    71   double avg_value(double* data);

    72   double max_value(double* data);

    73   double sum_of_values(double* data);

    74   double max_sum(double* data1, double* data2);

    75   double accounted_time_ms();

    76 

    77   // Card Table Count Cache stats

    78   double _min_clear_cc_time_ms;         // min

    79   double _max_clear_cc_time_ms;         // max

    80   double _cur_clear_cc_time_ms;         // clearing time during current pause

    81   double _cum_clear_cc_time_ms;         // cummulative clearing time

    82   jlong  _num_cc_clears;                // number of times the card count cache has been cleared

    83 

    84   // The following insance variables are directly accessed by G1CollectorPolicy

    85   // and TraceGen0TimeData. This is why those classes are declared friends.

    86   // An alternative is to add getters and setters for all of these fields.

    87   // It might also be possible to restructure the code to reduce these

    88   // dependencies.

    89   double _ext_root_scan_time;

    90   double _satb_filtering_time;

    91   double _update_rs_time;

    92   double _update_rs_processed_buffers;

    93   double _scan_rs_time;

    94   double _obj_copy_time;

    95   double _termination_time;

    96 

    97   double _cur_collection_start_sec;

    98   double _root_region_scan_wait_time_ms;

    99 

   100   double _recorded_young_cset_choice_time_ms;

   101   double _recorded_non_young_cset_choice_time_ms;

   102 

   103   double _recorded_young_free_cset_time_ms;

   104   double _recorded_non_young_free_cset_time_ms;

   105 

   106   void print(double pause_time_ms);

   107 

   108  public:

   109   G1GCPhaseTimes(uint max_gc_threads);

   110   void note_gc_start(double pause_start_time_sec, uint active_gc_threads,

   111     bool is_young_gc, bool is_initial_mark_gc, GCCause::Cause gc_cause);

   112   void note_gc_end(double pause_end_time_sec);

   113   void collapse_par_times();

   114 

   115   void record_gc_worker_start_time(uint worker_i, double ms) {

   116     assert(worker_i >= 0, "worker index must be > 0");

   117     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   118     _par_last_gc_worker_start_times_ms[worker_i] = ms;

   119   }

   120 

   121   void record_ext_root_scan_time(uint worker_i, double ms) {

   122     assert(worker_i >= 0, "worker index must be > 0");

   123     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   124     _par_last_ext_root_scan_times_ms[worker_i] = ms;

   125   }

   126 

   127   void record_satb_filtering_time(uint worker_i, double ms) {

   128     assert(worker_i >= 0, "worker index must be > 0");

   129     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   130     _par_last_satb_filtering_times_ms[worker_i] = ms;

   131   }

   132 

   133   void record_update_rs_time(uint worker_i, double ms) {

   134     assert(worker_i >= 0, "worker index must be > 0");

   135     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   136     _par_last_update_rs_times_ms[worker_i] = ms;

   137   }

   138 

   139   void record_update_rs_processed_buffers (uint worker_i,

   140                                            double processed_buffers) {

   141     assert(worker_i >= 0, "worker index must be > 0");

   142     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   143     _par_last_update_rs_processed_buffers[worker_i] = processed_buffers;

   144   }

   145 

   146   void record_scan_rs_time(uint worker_i, double ms) {

   147     assert(worker_i >= 0, "worker index must be > 0");

   148     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   149     _par_last_scan_rs_times_ms[worker_i] = ms;

   150   }

   151 

   152   void reset_obj_copy_time(uint worker_i) {

   153     assert(worker_i >= 0, "worker index must be > 0");

   154     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   155     _par_last_obj_copy_times_ms[worker_i] = 0.0;

   156   }

   157 

   158   void reset_obj_copy_time() {

   159     reset_obj_copy_time(0);

   160   }

   161 

   162   void record_obj_copy_time(uint worker_i, double ms) {

   163     assert(worker_i >= 0, "worker index must be > 0");

   164     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   165     _par_last_obj_copy_times_ms[worker_i] += ms;

   166   }

   167 

   168   void record_termination(uint worker_i, double ms, size_t attempts) {

   169     assert(worker_i >= 0, "worker index must be > 0");

   170     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   171     _par_last_termination_times_ms[worker_i] = ms;

   172     _par_last_termination_attempts[worker_i] = (double) attempts;

   173   }

   174 

   175   void record_gc_worker_end_time(uint worker_i, double ms) {

   176     assert(worker_i >= 0, "worker index must be > 0");

   177     assert(worker_i < _active_gc_threads, "worker index out of bounds");

   178     _par_last_gc_worker_end_times_ms[worker_i] = ms;

   179   }

   180 

   181   void record_clear_ct_time(double ms) {

   182     _cur_clear_ct_time_ms = ms;

   183   }

   184 

   185   void record_par_time(double ms) {

   186     _cur_collection_par_time_ms = ms;

   187   }

   188 

   189   void record_code_root_fixup_time(double ms) {

   190     _cur_collection_code_root_fixup_time_ms = ms;

   191   }

   192 

   193   void record_ref_proc_time(double ms) {

   194     _cur_ref_proc_time_ms = ms;

   195   }

   196 

   197   void record_ref_enq_time(double ms) {

   198     _cur_ref_enq_time_ms = ms;

   199   }

   200 

   201   void record_root_region_scan_wait_time(double time_ms) {

   202     _root_region_scan_wait_time_ms = time_ms;

   203   }

   204 

   205   void record_cc_clear_time_ms(double ms);

   206 

   207   void record_young_free_cset_time_ms(double time_ms) {

   208     _recorded_young_free_cset_time_ms = time_ms;

   209   }

   210 

   211   void record_non_young_free_cset_time_ms(double time_ms) {

   212     _recorded_non_young_free_cset_time_ms = time_ms;

   213   }

   214 };

   215 

   216 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1GCPHASETIMESLOG_HPP