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src/share/vm/gc_implementation/g1/g1GCPhaseTimes.hpp

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   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 template <class T>
  32 class WorkerDataArray  : public CHeapObj<mtGC> {
  33   T*          _data;
  34   uint        _length;
  35   const char* _print_format;
  36   bool        _print_sum;
  37 
  38   NOT_PRODUCT(static const T _uninitialized;)
  39 
  40   // We are caching the sum and average to only have to calculate them once.
  41   // This is not done in an MT-safe way. It is intended to allow single
  42   // threaded code to call sum() and average() multiple times in any order
  43   // without having to worry about the cost.
  44   bool   _has_new_data;
  45   T      _sum;
  46   double _average;
  47 
  48  public:
  49   WorkerDataArray(uint length, const char* print_format, bool print_sum = true) :
  50   _length(length), _print_format(print_format), _print_sum(print_sum), _has_new_data(true) {
  51     assert(length > 0, "Must have some workers to store data for");
  52     _data = NEW_C_HEAP_ARRAY(T, _length, mtGC);
  53   }
  54 
  55   ~WorkerDataArray() {
  56     FREE_C_HEAP_ARRAY(T, _data, mtGC);
  57   }
  58 
  59   void set(uint worker_i, T value) {
  60     assert(worker_i < _length, err_msg("Worker %d is greater than max: %d", worker_i, _length));
  61     assert(_data[worker_i] == (T)-1, err_msg("Overwriting data for worker %d", worker_i));
  62     _data[worker_i] = value;
  63     _has_new_data = true;
  64   }
  65 
  66   T get(uint worker_i) {
  67     assert(worker_i < _length, err_msg("Worker %d is greater than max: %d", worker_i, _length));
  68     assert(_data[worker_i] != (T)-1, err_msg("No data to add to for worker %d", worker_i));
  69     return _data[worker_i];
  70   }
  71 
  72   void add(uint worker_i, T value) {
  73     assert(worker_i < _length, err_msg("Worker %d is greater than max: %d", worker_i, _length));
  74     assert(_data[worker_i] != (T)-1, err_msg("No data to add to for worker %d", worker_i));
  75     _data[worker_i] += value;
  76     _has_new_data = true;
  77   }
  78 
  79   double average(){
  80     if (_has_new_data) {
  81       calculate_totals();
  82     }
  83     return _average;
  84   }
  85 
  86   T sum() {
  87     if (_has_new_data) {
  88       calculate_totals();
  89     }
  90     return _sum;
  91   }
  92 
  93   void print(int level, const char* title);
  94 
  95   void reset() PRODUCT_RETURN;
  96   void verify() PRODUCT_RETURN;
  97 
  98  private:
  99 
 100   void calculate_totals(){
 101     _sum = (T)0;
 102     for (uint i = 0; i < _length; ++i) {
 103       _sum += _data[i];
 104     }
 105     _average = (double)_sum / (double)_length;
 106     _has_new_data = false;
 107   }
 108 };
 109 
 110 class G1GCPhaseTimes : public CHeapObj<mtGC> {

 111 
 112  private:
 113   uint _active_gc_threads;
 114   uint _max_gc_threads;
 115 
 116   WorkerDataArray<double> _last_gc_worker_start_times_ms;
 117   WorkerDataArray<double> _last_ext_root_scan_times_ms;
 118   WorkerDataArray<double> _last_satb_filtering_times_ms;
 119   WorkerDataArray<double> _last_update_rs_times_ms;
 120   WorkerDataArray<int>    _last_update_rs_processed_buffers;
 121   WorkerDataArray<double> _last_scan_rs_times_ms;
 122   WorkerDataArray<double> _last_strong_code_root_scan_times_ms;
 123   WorkerDataArray<double> _last_obj_copy_times_ms;
 124   WorkerDataArray<double> _last_termination_times_ms;
 125   WorkerDataArray<size_t> _last_termination_attempts;
 126   WorkerDataArray<double> _last_gc_worker_end_times_ms;
 127   WorkerDataArray<double> _last_gc_worker_times_ms;
 128   WorkerDataArray<double> _last_gc_worker_other_times_ms;
















 129 
 130   double _cur_collection_par_time_ms;
 131   double _cur_collection_code_root_fixup_time_ms;
 132   double _cur_strong_code_root_purge_time_ms;
 133 
 134   double _cur_evac_fail_recalc_used;
 135   double _cur_evac_fail_restore_remsets;
 136   double _cur_evac_fail_remove_self_forwards;
 137 
 138   double                  _cur_string_dedup_fixup_time_ms;
 139   WorkerDataArray<double> _cur_string_dedup_queue_fixup_worker_times_ms;
 140   WorkerDataArray<double> _cur_string_dedup_table_fixup_worker_times_ms;
 141 
 142   double _cur_clear_ct_time_ms;
 143   double _cur_ref_proc_time_ms;
 144   double _cur_ref_enq_time_ms;
 145 
 146   double _cur_collection_start_sec;
 147   double _root_region_scan_wait_time_ms;
 148 
 149   double _recorded_young_cset_choice_time_ms;
 150   double _recorded_non_young_cset_choice_time_ms;
 151 
 152   WorkerDataArray<double> _last_redirty_logged_cards_time_ms;
 153   WorkerDataArray<size_t> _last_redirty_logged_cards_processed_cards;
 154   double _recorded_redirty_logged_cards_time_ms;
 155 
 156   double _recorded_young_free_cset_time_ms;
 157   double _recorded_non_young_free_cset_time_ms;
 158 
 159   double _cur_fast_reclaim_humongous_time_ms;
 160   size_t _cur_fast_reclaim_humongous_total;
 161   size_t _cur_fast_reclaim_humongous_candidates;
 162   size_t _cur_fast_reclaim_humongous_reclaimed;
 163 
 164   double _cur_verify_before_time_ms;
 165   double _cur_verify_after_time_ms;
 166 
 167   // Helper methods for detailed logging
 168   void print_stats(int level, const char* str, double value);
 169   void print_stats(int level, const char* str, size_t value);
 170   void print_stats(int level, const char* str, double value, uint workers);
 171 
 172  public:
 173   G1GCPhaseTimes(uint max_gc_threads);
 174   void note_gc_start(uint active_gc_threads);
 175   void note_gc_end();
 176   void print(double pause_time_sec);
 177 
 178   void record_gc_worker_start_time(uint worker_i, double ms) {
 179     _last_gc_worker_start_times_ms.set(worker_i, ms);
 180   }
 181 
 182   void record_ext_root_scan_time(uint worker_i, double ms) {
 183     _last_ext_root_scan_times_ms.set(worker_i, ms);
 184   }
 185 
 186   void record_satb_filtering_time(uint worker_i, double ms) {
 187     _last_satb_filtering_times_ms.set(worker_i, ms);
 188   }
 189 
 190   void record_update_rs_time(uint worker_i, double ms) {
 191     _last_update_rs_times_ms.set(worker_i, ms);
 192   }
 193 
 194   void record_update_rs_processed_buffers(uint worker_i, int processed_buffers) {
 195     _last_update_rs_processed_buffers.set(worker_i, processed_buffers);
 196   }
 197 
 198   void record_scan_rs_time(uint worker_i, double ms) {
 199     _last_scan_rs_times_ms.set(worker_i, ms);
 200   }
 201 
 202   void record_strong_code_root_scan_time(uint worker_i, double ms) {
 203     _last_strong_code_root_scan_times_ms.set(worker_i, ms);
 204   }
 205 
 206   void record_obj_copy_time(uint worker_i, double ms) {
 207     _last_obj_copy_times_ms.set(worker_i, ms);
 208   }
 209 
 210   void add_obj_copy_time(uint worker_i, double ms) {
 211     _last_obj_copy_times_ms.add(worker_i, ms);
 212   }
 213 
 214   void record_termination(uint worker_i, double ms, size_t attempts) {
 215     _last_termination_times_ms.set(worker_i, ms);
 216     _last_termination_attempts.set(worker_i, attempts);
 217   }





 218 
 219   void record_gc_worker_end_time(uint worker_i, double ms) {
 220     _last_gc_worker_end_times_ms.set(worker_i, ms);
 221   }
 222 
 223   void record_clear_ct_time(double ms) {
 224     _cur_clear_ct_time_ms = ms;
 225   }
 226 
 227   void record_par_time(double ms) {
 228     _cur_collection_par_time_ms = ms;
 229   }
 230 
 231   void record_code_root_fixup_time(double ms) {
 232     _cur_collection_code_root_fixup_time_ms = ms;
 233   }
 234 
 235   void record_strong_code_root_purge_time(double ms) {
 236     _cur_strong_code_root_purge_time_ms = ms;
 237   }
 238 
 239   void record_evac_fail_recalc_used_time(double ms) {
 240     _cur_evac_fail_recalc_used = ms;
 241   }
 242 
 243   void record_evac_fail_restore_remsets(double ms) {
 244     _cur_evac_fail_restore_remsets = ms;
 245   }
 246 
 247   void record_evac_fail_remove_self_forwards(double ms) {
 248     _cur_evac_fail_remove_self_forwards = ms;
 249   }
 250 
 251   void note_string_dedup_fixup_start();
 252   void note_string_dedup_fixup_end();
 253 
 254   void record_string_dedup_fixup_time(double ms) {
 255     _cur_string_dedup_fixup_time_ms = ms;
 256   }
 257 
 258   void record_string_dedup_queue_fixup_worker_time(uint worker_id, double ms) {
 259     _cur_string_dedup_queue_fixup_worker_times_ms.set(worker_id, ms);
 260   }
 261 
 262   void record_string_dedup_table_fixup_worker_time(uint worker_id, double ms) {
 263     _cur_string_dedup_table_fixup_worker_times_ms.set(worker_id, ms);
 264   }
 265 
 266   void record_ref_proc_time(double ms) {
 267     _cur_ref_proc_time_ms = ms;
 268   }
 269 
 270   void record_ref_enq_time(double ms) {
 271     _cur_ref_enq_time_ms = ms;
 272   }
 273 
 274   void record_root_region_scan_wait_time(double time_ms) {
 275     _root_region_scan_wait_time_ms = time_ms;
 276   }
 277 
 278   void record_young_free_cset_time_ms(double time_ms) {
 279     _recorded_young_free_cset_time_ms = time_ms;
 280   }
 281 
 282   void record_non_young_free_cset_time_ms(double time_ms) {
 283     _recorded_non_young_free_cset_time_ms = time_ms;
 284   }
 285 
 286   void record_fast_reclaim_humongous_stats(size_t total, size_t candidates) {
 287     _cur_fast_reclaim_humongous_total = total;
 288     _cur_fast_reclaim_humongous_candidates = candidates;
 289   }
 290 
 291   void record_fast_reclaim_humongous_time_ms(double value, size_t reclaimed) {
 292     _cur_fast_reclaim_humongous_time_ms = value;
 293     _cur_fast_reclaim_humongous_reclaimed = reclaimed;
 294   }
 295 
 296   void record_young_cset_choice_time_ms(double time_ms) {
 297     _recorded_young_cset_choice_time_ms = time_ms;
 298   }
 299 
 300   void record_non_young_cset_choice_time_ms(double time_ms) {
 301     _recorded_non_young_cset_choice_time_ms = time_ms;
 302   }
 303 
 304   void record_redirty_logged_cards_time_ms(uint worker_i, double time_ms) {
 305     _last_redirty_logged_cards_time_ms.set(worker_i, time_ms);
 306   }
 307 
 308   void record_redirty_logged_cards_processed_cards(uint worker_i, size_t processed_buffers) {
 309     _last_redirty_logged_cards_processed_cards.set(worker_i, processed_buffers);
 310   }
 311 
 312   void record_redirty_logged_cards_time_ms(double time_ms) {
 313     _recorded_redirty_logged_cards_time_ms = time_ms;
 314   }
 315 
 316   void record_cur_collection_start_sec(double time_ms) {
 317     _cur_collection_start_sec = time_ms;
 318   }
 319 
 320   void record_verify_before_time_ms(double time_ms) {
 321     _cur_verify_before_time_ms = time_ms;
 322   }
 323 
 324   void record_verify_after_time_ms(double time_ms) {
 325     _cur_verify_after_time_ms = time_ms;
 326   }
 327 
 328   double accounted_time_ms();
 329 
 330   double cur_collection_start_sec() {
 331     return _cur_collection_start_sec;


 345 
 346   double young_cset_choice_time_ms() {
 347     return _recorded_young_cset_choice_time_ms;
 348   }
 349 
 350   double young_free_cset_time_ms() {
 351     return _recorded_young_free_cset_time_ms;
 352   }
 353 
 354   double non_young_cset_choice_time_ms() {
 355     return _recorded_non_young_cset_choice_time_ms;
 356   }
 357 
 358   double non_young_free_cset_time_ms() {
 359     return _recorded_non_young_free_cset_time_ms;
 360   }
 361 
 362   double fast_reclaim_humongous_time_ms() {
 363     return _cur_fast_reclaim_humongous_time_ms;
 364   }

 365 
 366   double average_last_update_rs_time() {
 367     return _last_update_rs_times_ms.average();
 368   }
 369 
 370   int sum_last_update_rs_processed_buffers() {
 371     return _last_update_rs_processed_buffers.sum();
 372   }
 373 
 374   double average_last_scan_rs_time(){
 375     return _last_scan_rs_times_ms.average();
 376   }
 377 
 378   double average_last_strong_code_root_scan_time(){
 379     return _last_strong_code_root_scan_times_ms.average();
 380   }
 381 
 382   double average_last_obj_copy_time() {
 383     return _last_obj_copy_times_ms.average();
 384   }
 385 
 386   double average_last_termination_time() {
 387     return _last_termination_times_ms.average();
 388   }
 389 
 390   double average_last_ext_root_scan_time() {
 391     return _last_ext_root_scan_times_ms.average();
 392   }
 393 
 394   double average_last_satb_filtering_times_ms() {
 395     return _last_satb_filtering_times_ms.average();
 396   }
 397 };
 398 
 399 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1GCPHASETIMESLOG_HPP


   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 
  30 class LineBuffer;















  31 
  32 template <class T> class WorkerDataArray;




























































  33 
  34 class G1GCPhaseTimes : public CHeapObj<mtGC> {
  35   friend class G1GCParPhasePrinter;
  36 

  37   uint _active_gc_threads;
  38   uint _max_gc_threads;
  39 
  40  public:
  41   enum GCParPhases {
  42     GCWorkerStart,
  43     ExtRootScan,
  44     SATBFiltering,
  45     UpdateRS,
  46     ScanRS,
  47     CodeRoots,
  48     ObjCopy,
  49     Termination,
  50     Other,
  51     GCWorkerTotal,
  52     GCWorkerEnd,
  53     StringDedupQueueFixup,
  54     StringDedupTableFixup,
  55     RedirtyCards,
  56     GCParPhasesSentinel
  57   };
  58 
  59  private:
  60   // Markers for grouping the phases in the GCPhases enum above
  61   static const int GCMainParPhasesLast = GCWorkerEnd;
  62   static const int StringDedupPhasesFirst = StringDedupQueueFixup;
  63   static const int StringDedupPhasesLast = StringDedupTableFixup;
  64 
  65   WorkerDataArray<double>* _gc_par_phases[GCParPhasesSentinel];
  66   WorkerDataArray<size_t>* _update_rs_processed_buffers;
  67   WorkerDataArray<size_t>* _termination_attempts;
  68   WorkerDataArray<size_t>* _redirtied_cards;
  69 
  70   double _cur_collection_par_time_ms;
  71   double _cur_collection_code_root_fixup_time_ms;
  72   double _cur_strong_code_root_purge_time_ms;
  73 
  74   double _cur_evac_fail_recalc_used;
  75   double _cur_evac_fail_restore_remsets;
  76   double _cur_evac_fail_remove_self_forwards;
  77 
  78   double _cur_string_dedup_fixup_time_ms;


  79 
  80   double _cur_clear_ct_time_ms;
  81   double _cur_ref_proc_time_ms;
  82   double _cur_ref_enq_time_ms;
  83 
  84   double _cur_collection_start_sec;
  85   double _root_region_scan_wait_time_ms;
  86 
  87   double _recorded_young_cset_choice_time_ms;
  88   double _recorded_non_young_cset_choice_time_ms;
  89 


  90   double _recorded_redirty_logged_cards_time_ms;
  91 
  92   double _recorded_young_free_cset_time_ms;
  93   double _recorded_non_young_free_cset_time_ms;
  94 
  95   double _cur_fast_reclaim_humongous_time_ms;
  96   size_t _cur_fast_reclaim_humongous_total;
  97   size_t _cur_fast_reclaim_humongous_candidates;
  98   size_t _cur_fast_reclaim_humongous_reclaimed;
  99 
 100   double _cur_verify_before_time_ms;
 101   double _cur_verify_after_time_ms;
 102 
 103   // Helper methods for detailed logging
 104   void print_stats(int level, const char* str, double value);
 105   void print_stats(int level, const char* str, size_t value);
 106   void print_stats(int level, const char* str, double value, uint workers);
 107 
 108  public:
 109   G1GCPhaseTimes(uint max_gc_threads);
 110   void note_gc_start(uint active_gc_threads, bool mark_in_progress);
 111   void note_gc_end();
 112   void print(double pause_time_sec);
 113 
 114   // record the time a phase took in seconds
 115   void record_time_secs(GCParPhases phase, uint worker_i, double secs);

















 116 
 117   // add a number of seconds to a phase
 118   void add_time_secs(GCParPhases phase, uint worker_i, double secs);

 119 
 120   void record_thread_work_item(GCParPhases phase, uint worker_i, size_t count);


 121 
 122   // return the average time for a phase in milliseconds
 123   double average_time_ms(GCParPhases phase);

 124 
 125   size_t sum_thread_work_items(GCParPhases phase);


 126 
 127  private:
 128   double get_time_ms(GCParPhases phase, uint worker_i);
 129   double sum_time_ms(GCParPhases phase);
 130   double min_time_ms(GCParPhases phase);
 131   double max_time_ms(GCParPhases phase);
 132   size_t get_thread_work_item(GCParPhases phase, uint worker_i);
 133   double average_thread_work_items(GCParPhases phase);
 134   size_t min_thread_work_items(GCParPhases phase);
 135   size_t max_thread_work_items(GCParPhases phase);
 136 
 137  public:


 138 
 139   void record_clear_ct_time(double ms) {
 140     _cur_clear_ct_time_ms = ms;
 141   }
 142 
 143   void record_par_time(double ms) {
 144     _cur_collection_par_time_ms = ms;
 145   }
 146 
 147   void record_code_root_fixup_time(double ms) {
 148     _cur_collection_code_root_fixup_time_ms = ms;
 149   }
 150 
 151   void record_strong_code_root_purge_time(double ms) {
 152     _cur_strong_code_root_purge_time_ms = ms;
 153   }
 154 
 155   void record_evac_fail_recalc_used_time(double ms) {
 156     _cur_evac_fail_recalc_used = ms;
 157   }
 158 
 159   void record_evac_fail_restore_remsets(double ms) {
 160     _cur_evac_fail_restore_remsets = ms;
 161   }
 162 
 163   void record_evac_fail_remove_self_forwards(double ms) {
 164     _cur_evac_fail_remove_self_forwards = ms;
 165   }
 166 



 167   void record_string_dedup_fixup_time(double ms) {
 168     _cur_string_dedup_fixup_time_ms = ms;
 169   }
 170 








 171   void record_ref_proc_time(double ms) {
 172     _cur_ref_proc_time_ms = ms;
 173   }
 174 
 175   void record_ref_enq_time(double ms) {
 176     _cur_ref_enq_time_ms = ms;
 177   }
 178 
 179   void record_root_region_scan_wait_time(double time_ms) {
 180     _root_region_scan_wait_time_ms = time_ms;
 181   }
 182 
 183   void record_young_free_cset_time_ms(double time_ms) {
 184     _recorded_young_free_cset_time_ms = time_ms;
 185   }
 186 
 187   void record_non_young_free_cset_time_ms(double time_ms) {
 188     _recorded_non_young_free_cset_time_ms = time_ms;
 189   }
 190 
 191   void record_fast_reclaim_humongous_stats(size_t total, size_t candidates) {
 192     _cur_fast_reclaim_humongous_total = total;
 193     _cur_fast_reclaim_humongous_candidates = candidates;
 194   }
 195 
 196   void record_fast_reclaim_humongous_time_ms(double value, size_t reclaimed) {
 197     _cur_fast_reclaim_humongous_time_ms = value;
 198     _cur_fast_reclaim_humongous_reclaimed = reclaimed;
 199   }
 200 
 201   void record_young_cset_choice_time_ms(double time_ms) {
 202     _recorded_young_cset_choice_time_ms = time_ms;
 203   }
 204 
 205   void record_non_young_cset_choice_time_ms(double time_ms) {
 206     _recorded_non_young_cset_choice_time_ms = time_ms;
 207   }
 208 








 209   void record_redirty_logged_cards_time_ms(double time_ms) {
 210     _recorded_redirty_logged_cards_time_ms = time_ms;
 211   }
 212 
 213   void record_cur_collection_start_sec(double time_ms) {
 214     _cur_collection_start_sec = time_ms;
 215   }
 216 
 217   void record_verify_before_time_ms(double time_ms) {
 218     _cur_verify_before_time_ms = time_ms;
 219   }
 220 
 221   void record_verify_after_time_ms(double time_ms) {
 222     _cur_verify_after_time_ms = time_ms;
 223   }
 224 
 225   double accounted_time_ms();
 226 
 227   double cur_collection_start_sec() {
 228     return _cur_collection_start_sec;


 242 
 243   double young_cset_choice_time_ms() {
 244     return _recorded_young_cset_choice_time_ms;
 245   }
 246 
 247   double young_free_cset_time_ms() {
 248     return _recorded_young_free_cset_time_ms;
 249   }
 250 
 251   double non_young_cset_choice_time_ms() {
 252     return _recorded_non_young_cset_choice_time_ms;
 253   }
 254 
 255   double non_young_free_cset_time_ms() {
 256     return _recorded_non_young_free_cset_time_ms;
 257   }
 258 
 259   double fast_reclaim_humongous_time_ms() {
 260     return _cur_fast_reclaim_humongous_time_ms;
 261   }
 262 };
 263 
 264 class G1GCParPhaseTimesTracker : public StackObj {
 265   double _start_time;
 266   G1GCPhaseTimes::GCParPhases _phase;
 267   G1GCPhaseTimes* _phase_times;
 268   uint _worker_id;
 269 public:
 270   G1GCParPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1GCPhaseTimes::GCParPhases phase, uint worker_id);
 271   ~G1GCParPhaseTimesTracker();























 272 };
 273 
 274 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1GCPHASETIMESLOG_HPP
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