71   TruncatedSeq* _rs_length_seq;
  72 
  73   TruncatedSeq* _cost_per_byte_ms_during_cm_seq;
  74 
  75   // Statistics kept per GC stoppage, pause or full.
  76   TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec;
  77 
  78   // Cached values for long and short term pause time ratios. See
  79   // compute_pause_time_ratios() for how they are computed.
  80   double _long_term_pause_time_ratio;
  81   double _short_term_pause_time_ratio;
  82 
  83   // Returns whether the sequence have enough samples to get a "good" prediction.
  84   // The constant used is random but "small".
  85   bool enough_samples_available(TruncatedSeq const* seq) const;
  86 
  87   double predict_in_unit_interval(TruncatedSeq const* seq) const;
  88   size_t predict_size(TruncatedSeq const* seq) const;
  89   double predict_zero_bounded(TruncatedSeq const* seq) const;
  90 



  91 public:
  92   G1Analytics(const G1Predictions* predictor);
  93 
  94   double prev_collection_pause_end_ms() const {
  95     return _prev_collection_pause_end_ms;
  96   }
  97 
  98   double long_term_pause_time_ratio() const {
  99     return _long_term_pause_time_ratio;
 100   }
 101 
 102   double short_term_pause_time_ratio() const {
 103     return _short_term_pause_time_ratio;
 104   }
 105 
 106   uint number_of_recorded_pause_times() const {
 107     return NumPrevPausesForHeuristics;
 108   }
 109 
 110   void append_prev_collection_pause_end_ms(double ms) {

 143 
 144   double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) const;
 145 
 146   double predict_object_copy_time_ms(size_t bytes_to_copy, bool during_concurrent_mark) const;
 147 
 148   double predict_constant_other_time_ms() const;
 149 
 150   double predict_young_other_time_ms(size_t young_num) const;
 151 
 152   double predict_non_young_other_time_ms(size_t non_young_num) const;
 153 
 154   double predict_remark_time_ms() const;
 155 
 156   double predict_cleanup_time_ms() const;
 157 
 158   size_t predict_rs_length() const;
 159   size_t predict_pending_cards() const;
 160 
 161   // Add a new GC of the given duration and end time to the record.
 162   void update_recent_gc_times(double end_time_sec, double elapsed_ms);
 163   void compute_pause_time_ratio(double interval_ms, double pause_time_ms);
 164 
 165   double last_known_gc_end_time_sec() const;
 166 };
 167 
 168 #endif // SHARE_GC_G1_G1ANALYTICS_HPP

  71   TruncatedSeq* _rs_length_seq;
  72 
  73   TruncatedSeq* _cost_per_byte_ms_during_cm_seq;
  74 
  75   // Statistics kept per GC stoppage, pause or full.
  76   TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec;
  77 
  78   // Cached values for long and short term pause time ratios. See
  79   // compute_pause_time_ratios() for how they are computed.
  80   double _long_term_pause_time_ratio;
  81   double _short_term_pause_time_ratio;
  82 
  83   // Returns whether the sequence have enough samples to get a "good" prediction.
  84   // The constant used is random but "small".
  85   bool enough_samples_available(TruncatedSeq const* seq) const;
  86 
  87   double predict_in_unit_interval(TruncatedSeq const* seq) const;
  88   size_t predict_size(TruncatedSeq const* seq) const;
  89   double predict_zero_bounded(TruncatedSeq const* seq) const;
  90 
  91   double oldest_known_gc_end_time_sec() const;
  92   double most_recent_gc_end_time_sec() const;
  93 
  94 public:
  95   G1Analytics(const G1Predictions* predictor);
  96 
  97   double prev_collection_pause_end_ms() const {
  98     return _prev_collection_pause_end_ms;
  99   }
 100 
 101   double long_term_pause_time_ratio() const {
 102     return _long_term_pause_time_ratio;
 103   }
 104 
 105   double short_term_pause_time_ratio() const {
 106     return _short_term_pause_time_ratio;
 107   }
 108 
 109   uint number_of_recorded_pause_times() const {
 110     return NumPrevPausesForHeuristics;
 111   }
 112 
 113   void append_prev_collection_pause_end_ms(double ms) {

 146 
 147   double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) const;
 148 
 149   double predict_object_copy_time_ms(size_t bytes_to_copy, bool during_concurrent_mark) const;
 150 
 151   double predict_constant_other_time_ms() const;
 152 
 153   double predict_young_other_time_ms(size_t young_num) const;
 154 
 155   double predict_non_young_other_time_ms(size_t non_young_num) const;
 156 
 157   double predict_remark_time_ms() const;
 158 
 159   double predict_cleanup_time_ms() const;
 160 
 161   size_t predict_rs_length() const;
 162   size_t predict_pending_cards() const;
 163 
 164   // Add a new GC of the given duration and end time to the record.
 165   void update_recent_gc_times(double end_time_sec, double elapsed_ms);
 166   void compute_pause_time_ratios(double end_time_sec, double pause_time_ms);


 167 };
 168 
 169 #endif // SHARE_GC_G1_G1ANALYTICS_HPP