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 #include "precompiled.hpp"
  26 #include "gc/g1/concurrentG1Refine.hpp"
  27 #include "gc/g1/g1CollectedHeap.inline.hpp"
  28 #include "gc/g1/g1GCPhaseTimes.hpp"
  29 #include "gc/g1/g1Log.hpp"
  30 #include "gc/g1/g1StringDedup.hpp"
  31 #include "gc/g1/workerDataArray.inline.hpp"
  32 #include "memory/allocation.hpp"

  33 #include "runtime/os.hpp"
  34 
  35 // Helper class for avoiding interleaved logging
  36 class LineBuffer: public StackObj {
  37 
  38 private:
  39   static const int BUFFER_LEN = 1024;
  40   static const int INDENT_CHARS = 3;
  41   char _buffer[BUFFER_LEN];
  42   int _indent_level;
  43   int _cur;
  44 
  45   void vappend(const char* format, va_list ap)  ATTRIBUTE_PRINTF(2, 0) {
  46     int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap);
  47     if (res != -1) {
  48       _cur += res;
  49     } else {
  50       DEBUG_ONLY(warning("buffer too small in LineBuffer");)
  51       _buffer[BUFFER_LEN -1] = 0;
  52       _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again
  53     }
  54   }
  55 
  56 public:
  57   explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) {
  58     for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) {
  59       _buffer[_cur] = ' ';
  60     }
  61   }
  62 
  63 #ifndef PRODUCT
  64   ~LineBuffer() {
  65     assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?");
  66   }
  67 #endif
  68 
  69   void append(const char* format, ...)  ATTRIBUTE_PRINTF(2, 3) {
  70     va_list ap;
  71     va_start(ap, format);
  72     vappend(format, ap);
  73     va_end(ap);
  74   }
  75 
  76   void print_cr() {
  77     gclog_or_tty->print_cr("%s", _buffer);
  78     _cur = _indent_level * INDENT_CHARS;
  79   }
  80 
  81   void append_and_print_cr(const char* format, ...)  ATTRIBUTE_PRINTF(2, 3) {
  82     va_list ap;
  83     va_start(ap, format);
  84     vappend(format, ap);
  85     va_end(ap);
  86     print_cr();
  87   }
  88 };
  89 


  90 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
  91   _max_gc_threads(max_gc_threads)
  92 {
  93   assert(max_gc_threads > 0, "Must have some GC threads");
  94 
  95   _gc_par_phases[GCWorkerStart] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Start (ms)", false, G1Log::LevelFiner, 2);
  96   _gc_par_phases[ExtRootScan] = new WorkerDataArray<double>(max_gc_threads, "Ext Root Scanning (ms)", true, G1Log::LevelFiner, 2);
  97 
  98   // Root scanning phases
  99   _gc_par_phases[ThreadRoots] = new WorkerDataArray<double>(max_gc_threads, "Thread Roots (ms)", true, G1Log::LevelFinest, 3);
 100   _gc_par_phases[StringTableRoots] = new WorkerDataArray<double>(max_gc_threads, "StringTable Roots (ms)", true, G1Log::LevelFinest, 3);
 101   _gc_par_phases[UniverseRoots] = new WorkerDataArray<double>(max_gc_threads, "Universe Roots (ms)", true, G1Log::LevelFinest, 3);
 102   _gc_par_phases[JNIRoots] = new WorkerDataArray<double>(max_gc_threads, "JNI Handles Roots (ms)", true, G1Log::LevelFinest, 3);
 103   _gc_par_phases[ObjectSynchronizerRoots] = new WorkerDataArray<double>(max_gc_threads, "ObjectSynchronizer Roots (ms)", true, G1Log::LevelFinest, 3);
 104   _gc_par_phases[FlatProfilerRoots] = new WorkerDataArray<double>(max_gc_threads, "FlatProfiler Roots (ms)", true, G1Log::LevelFinest, 3);
 105   _gc_par_phases[ManagementRoots] = new WorkerDataArray<double>(max_gc_threads, "Management Roots (ms)", true, G1Log::LevelFinest, 3);
 106   _gc_par_phases[SystemDictionaryRoots] = new WorkerDataArray<double>(max_gc_threads, "SystemDictionary Roots (ms)", true, G1Log::LevelFinest, 3);
 107   _gc_par_phases[CLDGRoots] = new WorkerDataArray<double>(max_gc_threads, "CLDG Roots (ms)", true, G1Log::LevelFinest, 3);
 108   _gc_par_phases[JVMTIRoots] = new WorkerDataArray<double>(max_gc_threads, "JVMTI Roots (ms)", true, G1Log::LevelFinest, 3);
 109   _gc_par_phases[CMRefRoots] = new WorkerDataArray<double>(max_gc_threads, "CM RefProcessor Roots (ms)", true, G1Log::LevelFinest, 3);
 110   _gc_par_phases[WaitForStrongCLD] = new WorkerDataArray<double>(max_gc_threads, "Wait For Strong CLD (ms)", true, G1Log::LevelFinest, 3);
 111   _gc_par_phases[WeakCLDRoots] = new WorkerDataArray<double>(max_gc_threads, "Weak CLD Roots (ms)", true, G1Log::LevelFinest, 3);
 112   _gc_par_phases[SATBFiltering] = new WorkerDataArray<double>(max_gc_threads, "SATB Filtering (ms)", true, G1Log::LevelFinest, 3);
 113 
 114   _gc_par_phases[UpdateRS] = new WorkerDataArray<double>(max_gc_threads, "Update RS (ms)", true, G1Log::LevelFiner, 2);
 115   _gc_par_phases[ScanHCC] = new WorkerDataArray<double>(max_gc_threads, "Scan HCC (ms)", true, G1Log::LevelFiner, 3);
 116   _gc_par_phases[ScanHCC]->set_enabled(ConcurrentG1Refine::hot_card_cache_enabled());
 117   _gc_par_phases[ScanRS] = new WorkerDataArray<double>(max_gc_threads, "Scan RS (ms)", true, G1Log::LevelFiner, 2);
 118   _gc_par_phases[CodeRoots] = new WorkerDataArray<double>(max_gc_threads, "Code Root Scanning (ms)", true, G1Log::LevelFiner, 2);
 119   _gc_par_phases[ObjCopy] = new WorkerDataArray<double>(max_gc_threads, "Object Copy (ms)", true, G1Log::LevelFiner, 2);
 120   _gc_par_phases[Termination] = new WorkerDataArray<double>(max_gc_threads, "Termination (ms)", true, G1Log::LevelFiner, 2);
 121   _gc_par_phases[GCWorkerTotal] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Total (ms)", true, G1Log::LevelFiner, 2);
 122   _gc_par_phases[GCWorkerEnd] = new WorkerDataArray<double>(max_gc_threads, "GC Worker End (ms)", false, G1Log::LevelFiner, 2);
 123   _gc_par_phases[Other] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Other (ms)", true, G1Log::LevelFiner, 2);
 124 
 125   _update_rs_processed_buffers = new WorkerDataArray<size_t>(max_gc_threads, "Processed Buffers", true, G1Log::LevelFiner, 3);
 126   _gc_par_phases[UpdateRS]->link_thread_work_items(_update_rs_processed_buffers);
 127 
 128   _termination_attempts = new WorkerDataArray<size_t>(max_gc_threads, "Termination Attempts", true, G1Log::LevelFinest, 3);
 129   _gc_par_phases[Termination]->link_thread_work_items(_termination_attempts);
 130 
 131   _gc_par_phases[StringDedupQueueFixup] = new WorkerDataArray<double>(max_gc_threads, "Queue Fixup (ms)", true, G1Log::LevelFiner, 2);
 132   _gc_par_phases[StringDedupTableFixup] = new WorkerDataArray<double>(max_gc_threads, "Table Fixup (ms)", true, G1Log::LevelFiner, 2);
 133 
 134   _gc_par_phases[RedirtyCards] = new WorkerDataArray<double>(max_gc_threads, "Parallel Redirty", true, G1Log::LevelFinest, 3);
 135   _redirtied_cards = new WorkerDataArray<size_t>(max_gc_threads, "Redirtied Cards", true, G1Log::LevelFinest, 3);
 136   _gc_par_phases[RedirtyCards]->link_thread_work_items(_redirtied_cards);
 137 }
 138 
 139 void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) {
 140   assert(active_gc_threads > 0, "The number of threads must be > 0");
 141   assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max number of threads");
 142   _active_gc_threads = active_gc_threads;
 143   _cur_expand_heap_time_ms = 0.0;
 144 
 145   for (int i = 0; i < GCParPhasesSentinel; i++) {
 146     _gc_par_phases[i]->reset();
 147   }
 148 
 149   _gc_par_phases[StringDedupQueueFixup]->set_enabled(G1StringDedup::is_enabled());
 150   _gc_par_phases[StringDedupTableFixup]->set_enabled(G1StringDedup::is_enabled());
 151 }
 152 
 153 void G1GCPhaseTimes::note_gc_end() {
 154   for (uint i = 0; i < _active_gc_threads; i++) {
 155     double worker_time = _gc_par_phases[GCWorkerEnd]->get(i) - _gc_par_phases[GCWorkerStart]->get(i);
 156     record_time_secs(GCWorkerTotal, i , worker_time);
 157 
 158     double worker_known_time =
 159         _gc_par_phases[ExtRootScan]->get(i) +
 160         _gc_par_phases[SATBFiltering]->get(i) +
 161         _gc_par_phases[UpdateRS]->get(i) +
 162         _gc_par_phases[ScanRS]->get(i) +
 163         _gc_par_phases[CodeRoots]->get(i) +
 164         _gc_par_phases[ObjCopy]->get(i) +
 165         _gc_par_phases[Termination]->get(i);
 166 
 167     record_time_secs(Other, i, worker_time - worker_known_time);
 168   }
 169 
 170   for (int i = 0; i < GCParPhasesSentinel; i++) {
 171     _gc_par_phases[i]->verify(_active_gc_threads);
 172   }
 173 }
 174 
 175 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) {
 176   LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value);
 177 }
 178 
 179 void G1GCPhaseTimes::print_stats(int level, const char* str, size_t value) {
 180   LineBuffer(level).append_and_print_cr("[%s: " SIZE_FORMAT "]", str, value);
 181 }
 182 
 183 void G1GCPhaseTimes::print_stats(int level, const char* str, double value, uint workers) {
 184   LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %u]", str, value, workers);
 185 }
 186 
 187 double G1GCPhaseTimes::accounted_time_ms() {
 188     // Subtract the root region scanning wait time. It's initialized to
 189     // zero at the start of the pause.
 190     double misc_time_ms = _root_region_scan_wait_time_ms;
 191 
 192     misc_time_ms += _cur_collection_par_time_ms;
 193 
 194     // Now subtract the time taken to fix up roots in generated code
 195     misc_time_ms += _cur_collection_code_root_fixup_time_ms;
 196 
 197     // Strong code root purge time
 198     misc_time_ms += _cur_strong_code_root_purge_time_ms;
 199 
 200     if (G1StringDedup::is_enabled()) {
 201       // String dedup fixup time
 202       misc_time_ms += _cur_string_dedup_fixup_time_ms;
 203     }
 204 
 205     // Subtract the time taken to clean the card table from the
 206     // current value of "other time"
 207     misc_time_ms += _cur_clear_ct_time_ms;
 208 
 209     // Remove expand heap time from "other time"
 210     misc_time_ms += _cur_expand_heap_time_ms;
 211 
 212     return misc_time_ms;
 213 }
 214 
 215 // record the time a phase took in seconds
 216 void G1GCPhaseTimes::record_time_secs(GCParPhases phase, uint worker_i, double secs) {
 217   _gc_par_phases[phase]->set(worker_i, secs);
 218 }
 219 
 220 // add a number of seconds to a phase
 221 void G1GCPhaseTimes::add_time_secs(GCParPhases phase, uint worker_i, double secs) {
 222   _gc_par_phases[phase]->add(worker_i, secs);
 223 }
 224 
 225 void G1GCPhaseTimes::record_thread_work_item(GCParPhases phase, uint worker_i, size_t count) {
 226   _gc_par_phases[phase]->set_thread_work_item(worker_i, count);
 227 }
 228 
 229 // return the average time for a phase in milliseconds
 230 double G1GCPhaseTimes::average_time_ms(GCParPhases phase) {
 231   return _gc_par_phases[phase]->average(_active_gc_threads) * 1000.0;
 232 }
 233 
 234 double G1GCPhaseTimes::get_time_ms(GCParPhases phase, uint worker_i) {
 235   return _gc_par_phases[phase]->get(worker_i) * 1000.0;
 236 }
 237 
 238 double G1GCPhaseTimes::sum_time_ms(GCParPhases phase) {
 239   return _gc_par_phases[phase]->sum(_active_gc_threads) * 1000.0;
 240 }
 241 
 242 double G1GCPhaseTimes::min_time_ms(GCParPhases phase) {
 243   return _gc_par_phases[phase]->minimum(_active_gc_threads) * 1000.0;
 244 }
 245 
 246 double G1GCPhaseTimes::max_time_ms(GCParPhases phase) {
 247   return _gc_par_phases[phase]->maximum(_active_gc_threads) * 1000.0;
 248 }
 249 
 250 size_t G1GCPhaseTimes::get_thread_work_item(GCParPhases phase, uint worker_i) {
 251   assert(_gc_par_phases[phase]->thread_work_items() != NULL, "No sub count");
 252   return _gc_par_phases[phase]->thread_work_items()->get(worker_i);
 253 }
 254 
 255 size_t G1GCPhaseTimes::sum_thread_work_items(GCParPhases phase) {
 256   assert(_gc_par_phases[phase]->thread_work_items() != NULL, "No sub count");
 257   return _gc_par_phases[phase]->thread_work_items()->sum(_active_gc_threads);
 258 }
 259 
 260 double G1GCPhaseTimes::average_thread_work_items(GCParPhases phase) {
 261   assert(_gc_par_phases[phase]->thread_work_items() != NULL, "No sub count");
 262   return _gc_par_phases[phase]->thread_work_items()->average(_active_gc_threads);
 263 }
 264 
 265 size_t G1GCPhaseTimes::min_thread_work_items(GCParPhases phase) {
 266   assert(_gc_par_phases[phase]->thread_work_items() != NULL, "No sub count");
 267   return _gc_par_phases[phase]->thread_work_items()->minimum(_active_gc_threads);
 268 }
 269 
 270 size_t G1GCPhaseTimes::max_thread_work_items(GCParPhases phase) {
 271   assert(_gc_par_phases[phase]->thread_work_items() != NULL, "No sub count");
 272   return _gc_par_phases[phase]->thread_work_items()->maximum(_active_gc_threads);
 273 }
 274 
 275 class G1GCParPhasePrinter : public StackObj {
 276   G1GCPhaseTimes* _phase_times;
 277  public:
 278   G1GCParPhasePrinter(G1GCPhaseTimes* phase_times) : _phase_times(phase_times) {}
 279 
 280   void print(G1GCPhaseTimes::GCParPhases phase_id) {
 281     WorkerDataArray<double>* phase = _phase_times->_gc_par_phases[phase_id];
 282 
 283     if (phase->_log_level > G1Log::level() || !phase->_enabled) {
 284       return;
 285     }
 286 
 287     if (phase->_length == 1) {
 288       print_single_length(phase_id, phase);
 289     } else {
 290       print_multi_length(phase_id, phase);
 291     }
 292   }
 293 
 294  private:
 295 

 296   void print_single_length(G1GCPhaseTimes::GCParPhases phase_id, WorkerDataArray<double>* phase) {
 297     // No need for min, max, average and sum for only one worker
 298     LineBuffer buf(phase->_indent_level);
 299     buf.append_and_print_cr("[%s:  %.1lf]", phase->_title, _phase_times->get_time_ms(phase_id, 0));
 300 
 301     if (phase->_thread_work_items != NULL) {
 302       LineBuffer buf2(phase->_thread_work_items->_indent_level);
 303       buf2.append_and_print_cr("[%s:  " SIZE_FORMAT "]", phase->_thread_work_items->_title, _phase_times->sum_thread_work_items(phase_id));
 304     }
 305   }
 306 
 307   void print_time_values(LineBuffer& buf, G1GCPhaseTimes::GCParPhases phase_id, WorkerDataArray<double>* phase) {


 308     uint active_length = _phase_times->_active_gc_threads;
 309     for (uint i = 0; i < active_length; ++i) {
 310       buf.append("  %.1lf", _phase_times->get_time_ms(phase_id, i));



 311     }
 312     buf.print_cr();
 313   }
 314 
 315   void print_count_values(LineBuffer& buf, G1GCPhaseTimes::GCParPhases phase_id, WorkerDataArray<size_t>* thread_work_items) {


 316     uint active_length = _phase_times->_active_gc_threads;
 317     for (uint i = 0; i < active_length; ++i) {
 318       buf.append("  " SIZE_FORMAT, _phase_times->get_thread_work_item(phase_id, i));
 319     }
 320     buf.print_cr();


 321   }
 322 
 323   void print_thread_work_items(G1GCPhaseTimes::GCParPhases phase_id, WorkerDataArray<size_t>* thread_work_items) {
 324     LineBuffer buf(thread_work_items->_indent_level);
 325     buf.append("[%s:", thread_work_items->_title);
 326 
 327     if (G1Log::finest()) {
 328       print_count_values(buf, phase_id, thread_work_items);
 329     }
 330 
 331     assert(thread_work_items->_print_sum, "%s does not have print sum true even though it is a count", thread_work_items->_title);
 332 
 333     buf.append_and_print_cr(" Min: " SIZE_FORMAT ", Avg: %.1lf, Max: " SIZE_FORMAT ", Diff: " SIZE_FORMAT ", Sum: " SIZE_FORMAT "]",

 334         _phase_times->min_thread_work_items(phase_id), _phase_times->average_thread_work_items(phase_id), _phase_times->max_thread_work_items(phase_id),
 335         _phase_times->max_thread_work_items(phase_id) - _phase_times->min_thread_work_items(phase_id), _phase_times->sum_thread_work_items(phase_id));


 336   }
 337 
 338   void print_multi_length(G1GCPhaseTimes::GCParPhases phase_id, WorkerDataArray<double>* phase) {
 339     LineBuffer buf(phase->_indent_level);
 340     buf.append("[%s:", phase->_title);
 341 
 342     if (G1Log::finest()) {
 343       print_time_values(buf, phase_id, phase);
 344     }
 345 
 346     buf.append(" Min: %.1lf, Avg: %.1lf, Max: %.1lf, Diff: %.1lf",



 347         _phase_times->min_time_ms(phase_id), _phase_times->average_time_ms(phase_id), _phase_times->max_time_ms(phase_id),
 348         _phase_times->max_time_ms(phase_id) - _phase_times->min_time_ms(phase_id));
 349 
 350     if (phase->_print_sum) {
 351       // for things like the start and end times the sum is not
 352       // that relevant
 353       buf.append(", Sum: %.1lf", _phase_times->sum_time_ms(phase_id));
 354     }
 355 
 356     buf.append_and_print_cr("]");
 357 
 358     if (phase->_thread_work_items != NULL) {
 359       print_thread_work_items(phase_id, phase->_thread_work_items);
 360     }
 361   }
 362 };
 363 
 364 void G1GCPhaseTimes::print(double pause_time_sec) {
 365   note_gc_end();
 366 
 367   G1GCParPhasePrinter par_phase_printer(this);
 368 
 369   if (_root_region_scan_wait_time_ms > 0.0) {
 370     print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
 371   }
 372 
 373   print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
 374   for (int i = 0; i <= GCMainParPhasesLast; i++) {
 375     par_phase_printer.print((GCParPhases) i);
 376   }
 377 
 378   print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
 379   print_stats(1, "Code Root Purge", _cur_strong_code_root_purge_time_ms);
 380   if (G1StringDedup::is_enabled()) {
 381     print_stats(1, "String Dedup Fixup", _cur_string_dedup_fixup_time_ms, _active_gc_threads);
 382     for (int i = StringDedupPhasesFirst; i <= StringDedupPhasesLast; i++) {
 383       par_phase_printer.print((GCParPhases) i);
 384     }
 385   }
 386   print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
 387   print_stats(1, "Expand Heap After Collection", _cur_expand_heap_time_ms);
 388 
 389   double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms();
 390   print_stats(1, "Other", misc_time_ms);
 391   if (_cur_verify_before_time_ms > 0.0) {
 392     print_stats(2, "Verify Before", _cur_verify_before_time_ms);
 393   }
 394   if (G1CollectedHeap::heap()->evacuation_failed()) {
 395     double evac_fail_handling = _cur_evac_fail_recalc_used + _cur_evac_fail_remove_self_forwards +
 396       _cur_evac_fail_restore_remsets;
 397     print_stats(2, "Evacuation Failure", evac_fail_handling);
 398     if (G1Log::finest()) {
 399       print_stats(3, "Recalculate Used", _cur_evac_fail_recalc_used);
 400       print_stats(3, "Remove Self Forwards", _cur_evac_fail_remove_self_forwards);
 401       print_stats(3, "Restore RemSet", _cur_evac_fail_restore_remsets);
 402     }
 403   }
 404   print_stats(2, "Choose CSet",
 405     (_recorded_young_cset_choice_time_ms +
 406     _recorded_non_young_cset_choice_time_ms));
 407   print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
 408   print_stats(2, "Ref Enq", _cur_ref_enq_time_ms);
 409   print_stats(2, "Redirty Cards", _recorded_redirty_logged_cards_time_ms);
 410   par_phase_printer.print(RedirtyCards);
 411   if (G1EagerReclaimHumongousObjects) {
 412     print_stats(2, "Humongous Register", _cur_fast_reclaim_humongous_register_time_ms);
 413     if (G1Log::finest()) {
 414       print_stats(3, "Humongous Total", _cur_fast_reclaim_humongous_total);
 415       print_stats(3, "Humongous Candidate", _cur_fast_reclaim_humongous_candidates);
 416     }
 417     print_stats(2, "Humongous Reclaim", _cur_fast_reclaim_humongous_time_ms);
 418     if (G1Log::finest()) {
 419       print_stats(3, "Humongous Reclaimed", _cur_fast_reclaim_humongous_reclaimed);
 420     }
 421   }
 422   print_stats(2, "Free CSet",
 423     (_recorded_young_free_cset_time_ms +
 424     _recorded_non_young_free_cset_time_ms));
 425   if (G1Log::finest()) {
 426     print_stats(3, "Young Free CSet", _recorded_young_free_cset_time_ms);
 427     print_stats(3, "Non-Young Free CSet", _recorded_non_young_free_cset_time_ms);
 428   }
 429   if (_cur_verify_after_time_ms > 0.0) {
 430     print_stats(2, "Verify After", _cur_verify_after_time_ms);
 431   }
 432 }
 433 
 434 G1GCParPhaseTimesTracker::G1GCParPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1GCPhaseTimes::GCParPhases phase, uint worker_id) :
 435     _phase_times(phase_times), _phase(phase), _worker_id(worker_id) {
 436   if (_phase_times != NULL) {
 437     _start_time = os::elapsedTime();
 438   }
 439 }
 440 
 441 G1GCParPhaseTimesTracker::~G1GCParPhaseTimesTracker() {
 442   if (_phase_times != NULL) {
 443     _phase_times->record_time_secs(_phase, _worker_id, os::elapsedTime() - _start_time);
 444   }
 445 }
 446 
--- EOF ---