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

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rev 7854 : imported patch 8027962-per-phase-timing-measurements-for-strong-roots-processing
rev 7855 : [mq]: 8027962-bengt-suggestions
   1 /*
   2  * Copyright (c) 2013, 2014 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  *


 141 template <> const size_t WorkerDataArray<size_t>::_uninitialized = (size_t)-1;
 142 
 143 template <class T>
 144 void WorkerDataArray<T>::reset() {
 145   for (uint i = 0; i < _length; i++) {
 146     _data[i] = (T)_uninitialized;
 147   }
 148 }
 149 
 150 template <class T>
 151 void WorkerDataArray<T>::verify() {
 152   for (uint i = 0; i < _length; i++) {
 153     assert(_data[i] != _uninitialized,
 154         err_msg("Invalid data for worker %u, data: %lf, uninitialized: %lf",
 155             i, (double)_data[i], (double)_uninitialized));
 156   }
 157 }
 158 
 159 #endif
 160 
 161 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
 162   _max_gc_threads(max_gc_threads),

 163   _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false),
 164   _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"),

 165   _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"),
 166   _last_update_rs_times_ms(_max_gc_threads, "%.1lf"),
 167   _last_update_rs_processed_buffers(_max_gc_threads, "%d"),
 168   _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"),
 169   _last_strong_code_root_scan_times_ms(_max_gc_threads, "%.1lf"),
 170   _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"),
 171   _last_termination_times_ms(_max_gc_threads, "%.1lf"),
 172   _last_termination_attempts(_max_gc_threads, SIZE_FORMAT),
 173   _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false),
 174   _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"),
 175   _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf"),
 176   _last_redirty_logged_cards_time_ms(_max_gc_threads, "%.1lf"),
 177   _last_redirty_logged_cards_processed_cards(_max_gc_threads, SIZE_FORMAT),
 178   _cur_string_dedup_queue_fixup_worker_times_ms(_max_gc_threads, "%.1lf"),
 179   _cur_string_dedup_table_fixup_worker_times_ms(_max_gc_threads, "%.1lf")
 180 {
 181   assert(max_gc_threads > 0, "Must have some GC threads");















 182 }
 183 
 184 void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) {
 185   assert(active_gc_threads > 0, "The number of threads must be > 0");
 186   assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads");
 187   _active_gc_threads = active_gc_threads;
 188 
 189   _last_gc_worker_start_times_ms.reset();
 190   _last_ext_root_scan_times_ms.reset();
 191   _last_satb_filtering_times_ms.reset();
 192   _last_update_rs_times_ms.reset();
 193   _last_update_rs_processed_buffers.reset();
 194   _last_scan_rs_times_ms.reset();
 195   _last_strong_code_root_scan_times_ms.reset();
 196   _last_obj_copy_times_ms.reset();
 197   _last_termination_times_ms.reset();
 198   _last_termination_attempts.reset();
 199   _last_gc_worker_end_times_ms.reset();
 200   _last_gc_worker_times_ms.reset();
 201   _last_gc_worker_other_times_ms.reset();
 202 
 203   _last_redirty_logged_cards_time_ms.reset();
 204   _last_redirty_logged_cards_processed_cards.reset();
 205 



 206 }
 207 
 208 void G1GCPhaseTimes::note_gc_end() {
 209   _last_gc_worker_start_times_ms.verify();
 210   _last_ext_root_scan_times_ms.verify();
 211   _last_satb_filtering_times_ms.verify();
 212   _last_update_rs_times_ms.verify();
 213   _last_update_rs_processed_buffers.verify();
 214   _last_scan_rs_times_ms.verify();
 215   _last_strong_code_root_scan_times_ms.verify();
 216   _last_obj_copy_times_ms.verify();
 217   _last_termination_times_ms.verify();
 218   _last_termination_attempts.verify();
 219   _last_gc_worker_end_times_ms.verify();
 220 
 221   for (uint i = 0; i < _active_gc_threads; i++) {
 222     double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i);
 223     _last_gc_worker_times_ms.set(i, worker_time);
 224 
 225     double worker_known_time = _last_ext_root_scan_times_ms.get(i) +


 278 
 279     if (G1StringDedup::is_enabled()) {
 280       // String dedup fixup time
 281       misc_time_ms += _cur_string_dedup_fixup_time_ms;
 282     }
 283 
 284     // Subtract the time taken to clean the card table from the
 285     // current value of "other time"
 286     misc_time_ms += _cur_clear_ct_time_ms;
 287 
 288     return misc_time_ms;
 289 }
 290 
 291 void G1GCPhaseTimes::print(double pause_time_sec) {
 292   if (_root_region_scan_wait_time_ms > 0.0) {
 293     print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
 294   }
 295   print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
 296   _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)");
 297   _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)");






 298   if (_last_satb_filtering_times_ms.sum() > 0.0) {
 299     _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)");
 300   }
 301   _last_update_rs_times_ms.print(2, "Update RS (ms)");
 302     _last_update_rs_processed_buffers.print(3, "Processed Buffers");
 303   _last_scan_rs_times_ms.print(2, "Scan RS (ms)");
 304   _last_strong_code_root_scan_times_ms.print(2, "Code Root Scanning (ms)");
 305   _last_obj_copy_times_ms.print(2, "Object Copy (ms)");
 306   _last_termination_times_ms.print(2, "Termination (ms)");
 307   if (G1Log::finest()) {
 308     _last_termination_attempts.print(3, "Termination Attempts");
 309   }
 310   _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)");
 311   _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)");
 312   _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)");
 313 
 314   print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
 315   print_stats(1, "Code Root Purge", _cur_strong_code_root_purge_time_ms);
 316   if (G1StringDedup::is_enabled()) {
 317     print_stats(1, "String Dedup Fixup", _cur_string_dedup_fixup_time_ms, _active_gc_threads);


   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  *


 141 template <> const size_t WorkerDataArray<size_t>::_uninitialized = (size_t)-1;
 142 
 143 template <class T>
 144 void WorkerDataArray<T>::reset() {
 145   for (uint i = 0; i < _length; i++) {
 146     _data[i] = (T)_uninitialized;
 147   }
 148 }
 149 
 150 template <class T>
 151 void WorkerDataArray<T>::verify() {
 152   for (uint i = 0; i < _length; i++) {
 153     assert(_data[i] != _uninitialized,
 154         err_msg("Invalid data for worker %u, data: %lf, uninitialized: %lf",
 155             i, (double)_data[i], (double)_uninitialized));
 156   }
 157 }
 158 
 159 #endif
 160 
 161 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads, uint num_ext_root_scan_phases) :
 162   _max_gc_threads(max_gc_threads),
 163   _num_ext_root_scan_phases(num_ext_root_scan_phases),
 164   _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false),
 165   _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"),
 166   _last_ext_root_scan_phase_times_ms(NULL),
 167   _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"),
 168   _last_update_rs_times_ms(_max_gc_threads, "%.1lf"),
 169   _last_update_rs_processed_buffers(_max_gc_threads, "%d"),
 170   _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"),
 171   _last_strong_code_root_scan_times_ms(_max_gc_threads, "%.1lf"),
 172   _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"),
 173   _last_termination_times_ms(_max_gc_threads, "%.1lf"),
 174   _last_termination_attempts(_max_gc_threads, SIZE_FORMAT),
 175   _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false),
 176   _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"),
 177   _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf"),
 178   _last_redirty_logged_cards_time_ms(_max_gc_threads, "%.1lf"),
 179   _last_redirty_logged_cards_processed_cards(_max_gc_threads, SIZE_FORMAT),
 180   _cur_string_dedup_queue_fixup_worker_times_ms(_max_gc_threads, "%.1lf"),
 181   _cur_string_dedup_table_fixup_worker_times_ms(_max_gc_threads, "%.1lf")
 182 {
 183   assert(max_gc_threads > 0, "Must have some GC threads");
 184   if (track_ext_root_scan_phases()) {
 185     _last_ext_root_scan_phase_times_ms = NEW_C_HEAP_ARRAY(WorkerDataArray<double>*, num_ext_root_scan_phases, mtGC);
 186     for (uint i = 0; i < num_ext_root_scan_phases; i++) {
 187       _last_ext_root_scan_phase_times_ms[i] = new WorkerDataArray<double>(_max_gc_threads, "%.1lf");
 188     }
 189   }
 190 }
 191 
 192 G1GCPhaseTimes::~G1GCPhaseTimes() {
 193   if (track_ext_root_scan_phases()) {
 194     for (uint i = 0; i < _num_ext_root_scan_phases; i++) {
 195       delete _last_ext_root_scan_phase_times_ms[i];
 196     }
 197     FREE_C_HEAP_ARRAY(WorkerDataArray<double>*, _last_ext_root_scan_phase_times_ms);
 198   }
 199 }
 200 
 201 void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) {
 202   assert(active_gc_threads > 0, "The number of threads must be > 0");
 203   assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads");
 204   _active_gc_threads = active_gc_threads;
 205 
 206   _last_gc_worker_start_times_ms.reset();
 207   _last_ext_root_scan_times_ms.reset();
 208   _last_satb_filtering_times_ms.reset();
 209   _last_update_rs_times_ms.reset();
 210   _last_update_rs_processed_buffers.reset();
 211   _last_scan_rs_times_ms.reset();
 212   _last_strong_code_root_scan_times_ms.reset();
 213   _last_obj_copy_times_ms.reset();
 214   _last_termination_times_ms.reset();
 215   _last_termination_attempts.reset();
 216   _last_gc_worker_end_times_ms.reset();
 217   _last_gc_worker_times_ms.reset();
 218   _last_gc_worker_other_times_ms.reset();
 219 
 220   _last_redirty_logged_cards_time_ms.reset();
 221   _last_redirty_logged_cards_processed_cards.reset();
 222 
 223   for (uint i = 0; i < _num_ext_root_scan_phases; i++) {
 224     _last_ext_root_scan_phase_times_ms[i]->reset();
 225   }
 226 }
 227 
 228 void G1GCPhaseTimes::note_gc_end() {
 229   _last_gc_worker_start_times_ms.verify();
 230   _last_ext_root_scan_times_ms.verify();
 231   _last_satb_filtering_times_ms.verify();
 232   _last_update_rs_times_ms.verify();
 233   _last_update_rs_processed_buffers.verify();
 234   _last_scan_rs_times_ms.verify();
 235   _last_strong_code_root_scan_times_ms.verify();
 236   _last_obj_copy_times_ms.verify();
 237   _last_termination_times_ms.verify();
 238   _last_termination_attempts.verify();
 239   _last_gc_worker_end_times_ms.verify();
 240 
 241   for (uint i = 0; i < _active_gc_threads; i++) {
 242     double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i);
 243     _last_gc_worker_times_ms.set(i, worker_time);
 244 
 245     double worker_known_time = _last_ext_root_scan_times_ms.get(i) +


 298 
 299     if (G1StringDedup::is_enabled()) {
 300       // String dedup fixup time
 301       misc_time_ms += _cur_string_dedup_fixup_time_ms;
 302     }
 303 
 304     // Subtract the time taken to clean the card table from the
 305     // current value of "other time"
 306     misc_time_ms += _cur_clear_ct_time_ms;
 307 
 308     return misc_time_ms;
 309 }
 310 
 311 void G1GCPhaseTimes::print(double pause_time_sec) {
 312   if (_root_region_scan_wait_time_ms > 0.0) {
 313     print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
 314   }
 315   print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
 316   _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)");
 317   _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)");
 318   if (track_ext_root_scan_phases()) {
 319     for (uint i = 0; i < _num_ext_root_scan_phases; i++) {
 320       WorkerDataArray<double>* data = _last_ext_root_scan_phase_times_ms[i];
 321       data->print(3, G1CollectedHeap::ext_roots_task_string(i));
 322     }
 323   }
 324   if (_last_satb_filtering_times_ms.sum() > 0.0) {
 325     _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)");
 326   }
 327   _last_update_rs_times_ms.print(2, "Update RS (ms)");
 328     _last_update_rs_processed_buffers.print(3, "Processed Buffers");
 329   _last_scan_rs_times_ms.print(2, "Scan RS (ms)");
 330   _last_strong_code_root_scan_times_ms.print(2, "Code Root Scanning (ms)");
 331   _last_obj_copy_times_ms.print(2, "Object Copy (ms)");
 332   _last_termination_times_ms.print(2, "Termination (ms)");
 333   if (G1Log::finest()) {
 334     _last_termination_attempts.print(3, "Termination Attempts");
 335   }
 336   _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)");
 337   _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)");
 338   _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)");
 339 
 340   print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
 341   print_stats(1, "Code Root Purge", _cur_strong_code_root_purge_time_ms);
 342   if (G1StringDedup::is_enabled()) {
 343     print_stats(1, "String Dedup Fixup", _cur_string_dedup_fixup_time_ms, _active_gc_threads);


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