src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp

rev 6347 : 8042298: Remove the names gen0 and gen1 from the GC code
Summary: Renamed gen0 and gen1 to young and old throughout the GC code.
Reviewed-by:

*** 802,812 ****
    // since last pause.
    double end_sec = os::elapsedTime();
    double full_gc_time_sec = end_sec - _full_collection_start_sec;
    double full_gc_time_ms = full_gc_time_sec * 1000.0;
  
!   _trace_gen1_time_data.record_full_collection(full_gc_time_ms);
  
    update_recent_gc_times(end_sec, full_gc_time_ms);
  
    _g1->clear_full_collection();
  
--- 802,812 ----
    // since last pause.
    double end_sec = os::elapsedTime();
    double full_gc_time_sec = end_sec - _full_collection_start_sec;
    double full_gc_time_ms = full_gc_time_sec * 1000.0;
  
!   _trace_old_gen_time_data.record_full_collection(full_gc_time_ms);
  
    update_recent_gc_times(end_sec, full_gc_time_ms);
  
    _g1->clear_full_collection();
  
*** 844,854 ****
    assert(_g1->used() == _g1->recalculate_used(),
           err_msg("sanity, used: "SIZE_FORMAT" recalculate_used: "SIZE_FORMAT,
                   _g1->used(), _g1->recalculate_used()));
  
    double s_w_t_ms = (start_time_sec - _stop_world_start) * 1000.0;
!   _trace_gen0_time_data.record_start_collection(s_w_t_ms);
    _stop_world_start = 0.0;
  
    record_heap_size_info_at_start(false /* full */);
  
    phase_times()->record_cur_collection_start_sec(start_time_sec);
--- 844,854 ----
    assert(_g1->used() == _g1->recalculate_used(),
           err_msg("sanity, used: "SIZE_FORMAT" recalculate_used: "SIZE_FORMAT,
                   _g1->used(), _g1->recalculate_used()));
  
    double s_w_t_ms = (start_time_sec - _stop_world_start) * 1000.0;
!   _trace_young_gen_time_data.record_start_collection(s_w_t_ms);
    _stop_world_start = 0.0;
  
    record_heap_size_info_at_start(false /* full */);
  
    phase_times()->record_cur_collection_start_sec(start_time_sec);
*** 899,909 ****
  }
  
  void G1CollectorPolicy::record_concurrent_pause() {
    if (_stop_world_start > 0.0) {
      double yield_ms = (os::elapsedTime() - _stop_world_start) * 1000.0;
!     _trace_gen0_time_data.record_yield_time(yield_ms);
    }
  }
  
  bool G1CollectorPolicy::need_to_start_conc_mark(const char* source, size_t alloc_word_size) {
    if (_g1->concurrent_mark()->cmThread()->during_cycle()) {
--- 899,909 ----
  }
  
  void G1CollectorPolicy::record_concurrent_pause() {
    if (_stop_world_start > 0.0) {
      double yield_ms = (os::elapsedTime() - _stop_world_start) * 1000.0;
!     _trace_young_gen_time_data.record_yield_time(yield_ms);
    }
  }
  
  bool G1CollectorPolicy::need_to_start_conc_mark(const char* source, size_t alloc_word_size) {
    if (_g1->concurrent_mark()->cmThread()->during_cycle()) {
*** 986,996 ****
  
    evacuation_info.set_collectionset_used_before(_collection_set_bytes_used_before);
    evacuation_info.set_bytes_copied(_bytes_copied_during_gc);
  
    if (update_stats) {
!     _trace_gen0_time_data.record_end_collection(pause_time_ms, phase_times());
      // this is where we update the allocation rate of the application
      double app_time_ms =
        (phase_times()->cur_collection_start_sec() * 1000.0 - _prev_collection_pause_end_ms);
      if (app_time_ms < MIN_TIMER_GRANULARITY) {
        // This usually happens due to the timer not having the required
--- 986,996 ----
  
    evacuation_info.set_collectionset_used_before(_collection_set_bytes_used_before);
    evacuation_info.set_bytes_copied(_bytes_copied_during_gc);
  
    if (update_stats) {
!     _trace_young_gen_time_data.record_end_collection(pause_time_ms, phase_times());
      // this is where we update the allocation rate of the application
      double app_time_ms =
        (phase_times()->cur_collection_start_sec() * 1000.0 - _prev_collection_pause_end_ms);
      if (app_time_ms < MIN_TIMER_GRANULARITY) {
        // This usually happens due to the timer not having the required
*** 1408,1419 ****
      return 0;
    }
  }
  
  void G1CollectorPolicy::print_tracing_info() const {
!   _trace_gen0_time_data.print();
!   _trace_gen1_time_data.print();
  }
  
  void G1CollectorPolicy::print_yg_surv_rate_info() const {
  #ifndef PRODUCT
    _short_lived_surv_rate_group->print_surv_rate_summary();
--- 1408,1419 ----
      return 0;
    }
  }
  
  void G1CollectorPolicy::print_tracing_info() const {
!   _trace_young_gen_time_data.print();
!   _trace_old_gen_time_data.print();
  }
  
  void G1CollectorPolicy::print_yg_surv_rate_info() const {
  #ifndef PRODUCT
    _short_lived_surv_rate_group->print_surv_rate_summary();
*** 1966,1978 ****
                  _pending_cards, base_time_ms, time_remaining_ms, target_pause_time_ms);
  
    _last_gc_was_young = gcs_are_young() ? true : false;
  
    if (_last_gc_was_young) {
!     _trace_gen0_time_data.increment_young_collection_count();
    } else {
!     _trace_gen0_time_data.increment_mixed_collection_count();
    }
  
    // The young list is laid with the survivor regions from the previous
    // pause are appended to the RHS of the young list, i.e.
    //   [Newly Young Regions ++ Survivors from last pause].
--- 1966,1978 ----
                  _pending_cards, base_time_ms, time_remaining_ms, target_pause_time_ms);
  
    _last_gc_was_young = gcs_are_young() ? true : false;
  
    if (_last_gc_was_young) {
!     _trace_young_gen_time_data.increment_young_collection_count();
    } else {
!     _trace_young_gen_time_data.increment_mixed_collection_count();
    }
  
    // The young list is laid with the survivor regions from the previous
    // pause are appended to the RHS of the young list, i.e.
    //   [Newly Young Regions ++ Survivors from last pause].
*** 2149,2171 ****
    double non_young_end_time_sec = os::elapsedTime();
    phase_times()->record_non_young_cset_choice_time_ms((non_young_end_time_sec - non_young_start_time_sec) * 1000.0);
    evacuation_info.set_collectionset_regions(cset_region_length());
  }
  
! void TraceGen0TimeData::record_start_collection(double time_to_stop_the_world_ms) {
    if(TraceGen0Time) {
      _all_stop_world_times_ms.add(time_to_stop_the_world_ms);
    }
  }
  
! void TraceGen0TimeData::record_yield_time(double yield_time_ms) {
    if(TraceGen0Time) {
      _all_yield_times_ms.add(yield_time_ms);
    }
  }
  
! void TraceGen0TimeData::record_end_collection(double pause_time_ms, G1GCPhaseTimes* phase_times) {
    if(TraceGen0Time) {
      _total.add(pause_time_ms);
      _other.add(pause_time_ms - phase_times->accounted_time_ms());
      _root_region_scan_wait.add(phase_times->root_region_scan_wait_time_ms());
      _parallel.add(phase_times->cur_collection_par_time_ms());
--- 2149,2171 ----
    double non_young_end_time_sec = os::elapsedTime();
    phase_times()->record_non_young_cset_choice_time_ms((non_young_end_time_sec - non_young_start_time_sec) * 1000.0);
    evacuation_info.set_collectionset_regions(cset_region_length());
  }
  
! void TraceYoungGenTimeData::record_start_collection(double time_to_stop_the_world_ms) {
    if(TraceGen0Time) {
      _all_stop_world_times_ms.add(time_to_stop_the_world_ms);
    }
  }
  
! void TraceYoungGenTimeData::record_yield_time(double yield_time_ms) {
    if(TraceGen0Time) {
      _all_yield_times_ms.add(yield_time_ms);
    }
  }
  
! void TraceYoungGenTimeData::record_end_collection(double pause_time_ms, G1GCPhaseTimes* phase_times) {
    if(TraceGen0Time) {
      _total.add(pause_time_ms);
      _other.add(pause_time_ms - phase_times->accounted_time_ms());
      _root_region_scan_wait.add(phase_times->root_region_scan_wait_time_ms());
      _parallel.add(phase_times->cur_collection_par_time_ms());
*** 2187,2223 ****
      _parallel_other.add(parallel_other_time);
      _clear_ct.add(phase_times->cur_clear_ct_time_ms());
    }
  }
  
! void TraceGen0TimeData::increment_young_collection_count() {
    if(TraceGen0Time) {
      ++_young_pause_num;
    }
  }
  
! void TraceGen0TimeData::increment_mixed_collection_count() {
    if(TraceGen0Time) {
      ++_mixed_pause_num;
    }
  }
  
! void TraceGen0TimeData::print_summary(const char* str,
                                        const NumberSeq* seq) const {
    double sum = seq->sum();
    gclog_or_tty->print_cr("%-27s = %8.2lf s (avg = %8.2lf ms)",
                  str, sum / 1000.0, seq->avg());
  }
  
! void TraceGen0TimeData::print_summary_sd(const char* str,
                                           const NumberSeq* seq) const {
    print_summary(str, seq);
    gclog_or_tty->print_cr("%+45s = %5d, std dev = %8.2lf ms, max = %8.2lf ms)",
                  "(num", seq->num(), seq->sd(), seq->maximum());
  }
  
! void TraceGen0TimeData::print() const {
    if (!TraceGen0Time) {
      return;
    }
  
    gclog_or_tty->print_cr("ALL PAUSES");
--- 2187,2223 ----
      _parallel_other.add(parallel_other_time);
      _clear_ct.add(phase_times->cur_clear_ct_time_ms());
    }
  }
  
! void TraceYoungGenTimeData::increment_young_collection_count() {
    if(TraceGen0Time) {
      ++_young_pause_num;
    }
  }
  
! void TraceYoungGenTimeData::increment_mixed_collection_count() {
    if(TraceGen0Time) {
      ++_mixed_pause_num;
    }
  }
  
! void TraceYoungGenTimeData::print_summary(const char* str,
                                        const NumberSeq* seq) const {
    double sum = seq->sum();
    gclog_or_tty->print_cr("%-27s = %8.2lf s (avg = %8.2lf ms)",
                  str, sum / 1000.0, seq->avg());
  }
  
! void TraceYoungGenTimeData::print_summary_sd(const char* str,
                                           const NumberSeq* seq) const {
    print_summary(str, seq);
    gclog_or_tty->print_cr("%+45s = %5d, std dev = %8.2lf ms, max = %8.2lf ms)",
                  "(num", seq->num(), seq->sd(), seq->maximum());
  }
  
! void TraceYoungGenTimeData::print() const {
    if (!TraceGen0Time) {
      return;
    }
  
    gclog_or_tty->print_cr("ALL PAUSES");
*** 2251,2267 ****
    gclog_or_tty->print_cr("MISC");
    print_summary_sd("   Stop World", &_all_stop_world_times_ms);
    print_summary_sd("   Yields", &_all_yield_times_ms);
  }
  
! void TraceGen1TimeData::record_full_collection(double full_gc_time_ms) {
    if (TraceGen1Time) {
      _all_full_gc_times.add(full_gc_time_ms);
    }
  }
  
! void TraceGen1TimeData::print() const {
    if (!TraceGen1Time) {
      return;
    }
  
    if (_all_full_gc_times.num() > 0) {
--- 2251,2267 ----
    gclog_or_tty->print_cr("MISC");
    print_summary_sd("   Stop World", &_all_stop_world_times_ms);
    print_summary_sd("   Yields", &_all_yield_times_ms);
  }
  
! void TraceOldGenTimeData::record_full_collection(double full_gc_time_ms) {
    if (TraceGen1Time) {
      _all_full_gc_times.add(full_gc_time_ms);
    }
  }
  
! void TraceOldGenTimeData::print() const {
    if (!TraceGen1Time) {
      return;
    }
  
    if (_all_full_gc_times.num() > 0) {