src/hotspot/share/gc/g1/g1Analytics.cpp - platform/libcore - Git at Google

 /*
  * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */

 #include "precompiled.hpp"
 #include "gc/g1/g1Analytics.hpp"
 #include "gc/g1/g1Predictions.hpp"
 #include "runtime/os.hpp"
 #include "utilities/debug.hpp"
 #include "utilities/numberSeq.hpp"

 // Different defaults for different number of GC threads
 // They were chosen by running GCOld and SPECjbb on debris with different
 //   numbers of GC threads and choosing them based on the results

 // all the same
 static double rs_length_diff_defaults[] = {
   0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0
 };

 static double cost_per_card_ms_defaults[] = {
   0.01, 0.005, 0.005, 0.003, 0.003, 0.002, 0.002, 0.0015
 };

 // all the same
 static double young_cards_per_entry_ratio_defaults[] = {
   1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0
 };

 static double cost_per_entry_ms_defaults[] = {
   0.015, 0.01, 0.01, 0.008, 0.008, 0.0055, 0.0055, 0.005
 };

 static double cost_per_byte_ms_defaults[] = {
   0.00006, 0.00003, 0.00003, 0.000015, 0.000015, 0.00001, 0.00001, 0.000009
 };

 // these should be pretty consistent
 static double constant_other_time_ms_defaults[] = {
   5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0
 };


 static double young_other_cost_per_region_ms_defaults[] = {
   0.3, 0.2, 0.2, 0.15, 0.15, 0.12, 0.12, 0.1
 };

 static double non_young_other_cost_per_region_ms_defaults[] = {
   1.0, 0.7, 0.7, 0.5, 0.5, 0.42, 0.42, 0.30
 };

 G1Analytics::G1Analytics(const G1Predictions* predictor) :
     _predictor(predictor),
     _recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
     _concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
     _concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
     _alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
     _prev_collection_pause_end_ms(0.0),
     _rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)),
     _cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
     _cost_scan_hcc_seq(new TruncatedSeq(TruncatedSeqLength)),
     _young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
     _mixed_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
     _cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
     _mixed_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
     _cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
     _cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)),
     _constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
     _young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
     _non_young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
     _pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)),
     _rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)),
     _recent_prev_end_times_for_all_gcs_sec(new TruncatedSeq(NumPrevPausesForHeuristics)),
     _recent_avg_pause_time_ratio(0.0),
     _last_pause_time_ratio(0.0) {

   // Seed sequences with initial values.
   _recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime());
   _prev_collection_pause_end_ms = os::elapsedTime() * 1000.0;

   int index = MIN2(ParallelGCThreads - 1, 7u);

   _rs_length_diff_seq->add(rs_length_diff_defaults[index]);
   _cost_per_card_ms_seq->add(cost_per_card_ms_defaults[index]);
   _cost_scan_hcc_seq->add(0.0);
   _young_cards_per_entry_ratio_seq->add(young_cards_per_entry_ratio_defaults[index]);
   _cost_per_entry_ms_seq->add(cost_per_entry_ms_defaults[index]);
   _cost_per_byte_ms_seq->add(cost_per_byte_ms_defaults[index]);
   _constant_other_time_ms_seq->add(constant_other_time_ms_defaults[index]);
   _young_other_cost_per_region_ms_seq->add(young_other_cost_per_region_ms_defaults[index]);
   _non_young_other_cost_per_region_ms_seq->add(non_young_other_cost_per_region_ms_defaults[index]);

   // start conservatively (around 50ms is about right)
   _concurrent_mark_remark_times_ms->add(0.05);
   _concurrent_mark_cleanup_times_ms->add(0.20);
 }

 double G1Analytics::get_new_prediction(TruncatedSeq const* seq) const {
   return _predictor->get_new_prediction(seq);
 }

 size_t G1Analytics::get_new_size_prediction(TruncatedSeq const* seq) const {
   return (size_t)get_new_prediction(seq);
 }

 int G1Analytics::num_alloc_rate_ms() const {
   return _alloc_rate_ms_seq->num();
 }

 void G1Analytics::report_concurrent_mark_remark_times_ms(double ms) {
   _concurrent_mark_remark_times_ms->add(ms);
 }

 void G1Analytics::report_alloc_rate_ms(double alloc_rate) {
   _alloc_rate_ms_seq->add(alloc_rate);
 }

 void G1Analytics::compute_pause_time_ratio(double interval_ms, double pause_time_ms) {
   _recent_avg_pause_time_ratio = _recent_gc_times_ms->sum() / interval_ms;
   if (_recent_avg_pause_time_ratio < 0.0 ||
       (_recent_avg_pause_time_ratio - 1.0 > 0.0)) {
     // Clip ratio between 0.0 and 1.0, and continue. This will be fixed in
     // CR 6902692 by redoing the manner in which the ratio is incrementally computed.
     if (_recent_avg_pause_time_ratio < 0.0) {
       _recent_avg_pause_time_ratio = 0.0;
     } else {
       assert(_recent_avg_pause_time_ratio - 1.0 > 0.0, "Ctl-point invariant");
       _recent_avg_pause_time_ratio = 1.0;
     }
   }

   // Compute the ratio of just this last pause time to the entire time range stored
   // in the vectors. Comparing this pause to the entire range, rather than only the
   // most recent interval, has the effect of smoothing over a possible transient 'burst'
   // of more frequent pauses that don't really reflect a change in heap occupancy.
   // This reduces the likelihood of a needless heap expansion being triggered.
   _last_pause_time_ratio =
     (pause_time_ms * _recent_prev_end_times_for_all_gcs_sec->num()) / interval_ms;
 }

 void G1Analytics::report_cost_per_card_ms(double cost_per_card_ms) {
   _cost_per_card_ms_seq->add(cost_per_card_ms);
 }

 void G1Analytics::report_cost_scan_hcc(double cost_scan_hcc) {
   _cost_scan_hcc_seq->add(cost_scan_hcc);
 }

 void G1Analytics::report_cost_per_entry_ms(double cost_per_entry_ms, bool for_young_gc) {
   if (for_young_gc) {
     _cost_per_entry_ms_seq->add(cost_per_entry_ms);
   } else {
     _mixed_cost_per_entry_ms_seq->add(cost_per_entry_ms);
   }
 }

 void G1Analytics::report_cards_per_entry_ratio(double cards_per_entry_ratio, bool for_young_gc) {
   if (for_young_gc) {
     _young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio);
   } else {
     _mixed_cards_per_entry_ratio_seq->add(cards_per_entry_ratio);
   }
 }

 void G1Analytics::report_rs_length_diff(double rs_length_diff) {
   _rs_length_diff_seq->add(rs_length_diff);
 }

 void G1Analytics::report_cost_per_byte_ms(double cost_per_byte_ms, bool mark_or_rebuild_in_progress) {
   if (mark_or_rebuild_in_progress) {
     _cost_per_byte_ms_during_cm_seq->add(cost_per_byte_ms);
   } else {
     _cost_per_byte_ms_seq->add(cost_per_byte_ms);
   }
 }

 void G1Analytics::report_young_other_cost_per_region_ms(double other_cost_per_region_ms) {
   _young_other_cost_per_region_ms_seq->add(other_cost_per_region_ms);
 }

 void G1Analytics::report_non_young_other_cost_per_region_ms(double other_cost_per_region_ms) {
   _non_young_other_cost_per_region_ms_seq->add(other_cost_per_region_ms);
 }

 void G1Analytics::report_constant_other_time_ms(double constant_other_time_ms) {
   _constant_other_time_ms_seq->add(constant_other_time_ms);
 }

 void G1Analytics::report_pending_cards(double pending_cards) {
   _pending_cards_seq->add(pending_cards);
 }

 void G1Analytics::report_rs_lengths(double rs_lengths) {
   _rs_lengths_seq->add(rs_lengths);
 }

 size_t G1Analytics::predict_rs_length_diff() const {
   return get_new_size_prediction(_rs_length_diff_seq);
 }

 double G1Analytics::predict_alloc_rate_ms() const {
   return get_new_prediction(_alloc_rate_ms_seq);
 }

 double G1Analytics::predict_cost_per_card_ms() const {
   return get_new_prediction(_cost_per_card_ms_seq);
 }

 double G1Analytics::predict_scan_hcc_ms() const {
   return get_new_prediction(_cost_scan_hcc_seq);
 }

 double G1Analytics::predict_rs_update_time_ms(size_t pending_cards) const {
   return pending_cards * predict_cost_per_card_ms() + predict_scan_hcc_ms();
 }

 double G1Analytics::predict_young_cards_per_entry_ratio() const {
   return get_new_prediction(_young_cards_per_entry_ratio_seq);
 }

 double G1Analytics::predict_mixed_cards_per_entry_ratio() const {
   if (_mixed_cards_per_entry_ratio_seq->num() < 2) {
     return predict_young_cards_per_entry_ratio();
   } else {
     return get_new_prediction(_mixed_cards_per_entry_ratio_seq);
   }
 }

 size_t G1Analytics::predict_card_num(size_t rs_length, bool for_young_gc) const {
   if (for_young_gc) {
     return (size_t) (rs_length * predict_young_cards_per_entry_ratio());
   } else {
     return (size_t) (rs_length * predict_mixed_cards_per_entry_ratio());
   }
 }

 double G1Analytics::predict_rs_scan_time_ms(size_t card_num, bool for_young_gc) const {
   if (for_young_gc) {
     return card_num * get_new_prediction(_cost_per_entry_ms_seq);
   } else {
     return predict_mixed_rs_scan_time_ms(card_num);
   }
 }

 double G1Analytics::predict_mixed_rs_scan_time_ms(size_t card_num) const {
   if (_mixed_cost_per_entry_ms_seq->num() < 3) {
     return card_num * get_new_prediction(_cost_per_entry_ms_seq);
   } else {
     return card_num * get_new_prediction(_mixed_cost_per_entry_ms_seq);
   }
 }

 double G1Analytics::predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) const {
   if (_cost_per_byte_ms_during_cm_seq->num() < 3) {
     return (1.1 * bytes_to_copy) * get_new_prediction(_cost_per_byte_ms_seq);
   } else {
     return bytes_to_copy * get_new_prediction(_cost_per_byte_ms_during_cm_seq);
   }
 }

 double G1Analytics::predict_object_copy_time_ms(size_t bytes_to_copy, bool during_concurrent_mark) const {
   if (during_concurrent_mark) {
     return predict_object_copy_time_ms_during_cm(bytes_to_copy);
   } else {
     return bytes_to_copy * get_new_prediction(_cost_per_byte_ms_seq);
   }
 }

 double G1Analytics::predict_cost_per_byte_ms() const {
   return get_new_prediction(_cost_per_byte_ms_seq);
 }

 double G1Analytics::predict_constant_other_time_ms() const {
   return get_new_prediction(_constant_other_time_ms_seq);
 }

 double G1Analytics::predict_young_other_time_ms(size_t young_num) const {
   return young_num * get_new_prediction(_young_other_cost_per_region_ms_seq);
 }

 double G1Analytics::predict_non_young_other_time_ms(size_t non_young_num) const {
   return non_young_num * get_new_prediction(_non_young_other_cost_per_region_ms_seq);
 }

 double G1Analytics::predict_remark_time_ms() const {
   return get_new_prediction(_concurrent_mark_remark_times_ms);
 }

 double G1Analytics::predict_cleanup_time_ms() const {
   return get_new_prediction(_concurrent_mark_cleanup_times_ms);
 }

 size_t G1Analytics::predict_rs_lengths() const {
   return get_new_size_prediction(_rs_lengths_seq);
 }

 size_t G1Analytics::predict_pending_cards() const {
   return get_new_size_prediction(_pending_cards_seq);
 }

 double G1Analytics::last_known_gc_end_time_sec() const {
   return _recent_prev_end_times_for_all_gcs_sec->oldest();
 }

 void G1Analytics::update_recent_gc_times(double end_time_sec,
                                          double pause_time_ms) {
   _recent_gc_times_ms->add(pause_time_ms);
   _recent_prev_end_times_for_all_gcs_sec->add(end_time_sec);
   _prev_collection_pause_end_ms = end_time_sec * 1000.0;
 }

 void G1Analytics::report_concurrent_mark_cleanup_times_ms(double ms) {
   _concurrent_mark_cleanup_times_ms->add(ms);
 }
	/*
	* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*
	*/

	#include "precompiled.hpp"
	#include "gc/g1/g1Analytics.hpp"
	#include "gc/g1/g1Predictions.hpp"
	#include "runtime/os.hpp"
	#include "utilities/debug.hpp"
	#include "utilities/numberSeq.hpp"

	// Different defaults for different number of GC threads
	// They were chosen by running GCOld and SPECjbb on debris with different
	// numbers of GC threads and choosing them based on the results

	// all the same
	static double rs_length_diff_defaults[] = {
	0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0
	};

	static double cost_per_card_ms_defaults[] = {
	0.01, 0.005, 0.005, 0.003, 0.003, 0.002, 0.002, 0.0015
	};

	// all the same
	static double young_cards_per_entry_ratio_defaults[] = {
	1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0
	};

	static double cost_per_entry_ms_defaults[] = {
	0.015, 0.01, 0.01, 0.008, 0.008, 0.0055, 0.0055, 0.005
	};

	static double cost_per_byte_ms_defaults[] = {
	0.00006, 0.00003, 0.00003, 0.000015, 0.000015, 0.00001, 0.00001, 0.000009
	};

	// these should be pretty consistent
	static double constant_other_time_ms_defaults[] = {
	5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0
	};


	static double young_other_cost_per_region_ms_defaults[] = {
	0.3, 0.2, 0.2, 0.15, 0.15, 0.12, 0.12, 0.1
	};

	static double non_young_other_cost_per_region_ms_defaults[] = {
	1.0, 0.7, 0.7, 0.5, 0.5, 0.42, 0.42, 0.30
	};

	G1Analytics::G1Analytics(const G1Predictions* predictor) :
	_predictor(predictor),
	_recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
	_concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
	_concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
	_alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
	_prev_collection_pause_end_ms(0.0),
	_rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)),
	_cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
	_cost_scan_hcc_seq(new TruncatedSeq(TruncatedSeqLength)),
	_young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
	_mixed_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
	_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
	_mixed_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
	_cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
	_cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)),
	_constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
	_young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
	_non_young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
	_pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)),
	_rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)),
	_recent_prev_end_times_for_all_gcs_sec(new TruncatedSeq(NumPrevPausesForHeuristics)),
	_recent_avg_pause_time_ratio(0.0),
	_last_pause_time_ratio(0.0) {

	// Seed sequences with initial values.
	_recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime());
	_prev_collection_pause_end_ms = os::elapsedTime() * 1000.0;

	int index = MIN2(ParallelGCThreads - 1, 7u);

	_rs_length_diff_seq->add(rs_length_diff_defaults[index]);
	_cost_per_card_ms_seq->add(cost_per_card_ms_defaults[index]);
	_cost_scan_hcc_seq->add(0.0);
	_young_cards_per_entry_ratio_seq->add(young_cards_per_entry_ratio_defaults[index]);
	_cost_per_entry_ms_seq->add(cost_per_entry_ms_defaults[index]);
	_cost_per_byte_ms_seq->add(cost_per_byte_ms_defaults[index]);
	_constant_other_time_ms_seq->add(constant_other_time_ms_defaults[index]);
	_young_other_cost_per_region_ms_seq->add(young_other_cost_per_region_ms_defaults[index]);
	_non_young_other_cost_per_region_ms_seq->add(non_young_other_cost_per_region_ms_defaults[index]);

	// start conservatively (around 50ms is about right)
	_concurrent_mark_remark_times_ms->add(0.05);
	_concurrent_mark_cleanup_times_ms->add(0.20);
	}

	double G1Analytics::get_new_prediction(TruncatedSeq const* seq) const {
	return _predictor->get_new_prediction(seq);
	}

	size_t G1Analytics::get_new_size_prediction(TruncatedSeq const* seq) const {
	return (size_t)get_new_prediction(seq);
	}

	int G1Analytics::num_alloc_rate_ms() const {
	return _alloc_rate_ms_seq->num();
	}

	void G1Analytics::report_concurrent_mark_remark_times_ms(double ms) {
	_concurrent_mark_remark_times_ms->add(ms);
	}

	void G1Analytics::report_alloc_rate_ms(double alloc_rate) {
	_alloc_rate_ms_seq->add(alloc_rate);
	}

	void G1Analytics::compute_pause_time_ratio(double interval_ms, double pause_time_ms) {
	_recent_avg_pause_time_ratio = _recent_gc_times_ms->sum() / interval_ms;
	if (_recent_avg_pause_time_ratio < 0.0 \|\|
	(_recent_avg_pause_time_ratio - 1.0 > 0.0)) {
	// Clip ratio between 0.0 and 1.0, and continue. This will be fixed in
	// CR 6902692 by redoing the manner in which the ratio is incrementally computed.
	if (_recent_avg_pause_time_ratio < 0.0) {
	_recent_avg_pause_time_ratio = 0.0;
	} else {
	assert(_recent_avg_pause_time_ratio - 1.0 > 0.0, "Ctl-point invariant");
	_recent_avg_pause_time_ratio = 1.0;
	}
	}

	// Compute the ratio of just this last pause time to the entire time range stored
	// in the vectors. Comparing this pause to the entire range, rather than only the
	// most recent interval, has the effect of smoothing over a possible transient 'burst'
	// of more frequent pauses that don't really reflect a change in heap occupancy.
	// This reduces the likelihood of a needless heap expansion being triggered.
	_last_pause_time_ratio =
	(pause_time_ms * _recent_prev_end_times_for_all_gcs_sec->num()) / interval_ms;
	}

	void G1Analytics::report_cost_per_card_ms(double cost_per_card_ms) {
	_cost_per_card_ms_seq->add(cost_per_card_ms);
	}

	void G1Analytics::report_cost_scan_hcc(double cost_scan_hcc) {
	_cost_scan_hcc_seq->add(cost_scan_hcc);
	}

	void G1Analytics::report_cost_per_entry_ms(double cost_per_entry_ms, bool for_young_gc) {
	if (for_young_gc) {
	_cost_per_entry_ms_seq->add(cost_per_entry_ms);
	} else {
	_mixed_cost_per_entry_ms_seq->add(cost_per_entry_ms);
	}
	}

	void G1Analytics::report_cards_per_entry_ratio(double cards_per_entry_ratio, bool for_young_gc) {
	if (for_young_gc) {
	_young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio);
	} else {
	_mixed_cards_per_entry_ratio_seq->add(cards_per_entry_ratio);
	}
	}

	void G1Analytics::report_rs_length_diff(double rs_length_diff) {
	_rs_length_diff_seq->add(rs_length_diff);
	}

	void G1Analytics::report_cost_per_byte_ms(double cost_per_byte_ms, bool mark_or_rebuild_in_progress) {
	if (mark_or_rebuild_in_progress) {
	_cost_per_byte_ms_during_cm_seq->add(cost_per_byte_ms);
	} else {
	_cost_per_byte_ms_seq->add(cost_per_byte_ms);
	}
	}

	void G1Analytics::report_young_other_cost_per_region_ms(double other_cost_per_region_ms) {
	_young_other_cost_per_region_ms_seq->add(other_cost_per_region_ms);
	}

	void G1Analytics::report_non_young_other_cost_per_region_ms(double other_cost_per_region_ms) {
	_non_young_other_cost_per_region_ms_seq->add(other_cost_per_region_ms);
	}

	void G1Analytics::report_constant_other_time_ms(double constant_other_time_ms) {
	_constant_other_time_ms_seq->add(constant_other_time_ms);
	}

	void G1Analytics::report_pending_cards(double pending_cards) {
	_pending_cards_seq->add(pending_cards);
	}

	void G1Analytics::report_rs_lengths(double rs_lengths) {
	_rs_lengths_seq->add(rs_lengths);
	}

	size_t G1Analytics::predict_rs_length_diff() const {
	return get_new_size_prediction(_rs_length_diff_seq);
	}

	double G1Analytics::predict_alloc_rate_ms() const {
	return get_new_prediction(_alloc_rate_ms_seq);
	}

	double G1Analytics::predict_cost_per_card_ms() const {
	return get_new_prediction(_cost_per_card_ms_seq);
	}

	double G1Analytics::predict_scan_hcc_ms() const {
	return get_new_prediction(_cost_scan_hcc_seq);
	}

	double G1Analytics::predict_rs_update_time_ms(size_t pending_cards) const {
	return pending_cards * predict_cost_per_card_ms() + predict_scan_hcc_ms();
	}

	double G1Analytics::predict_young_cards_per_entry_ratio() const {
	return get_new_prediction(_young_cards_per_entry_ratio_seq);
	}

	double G1Analytics::predict_mixed_cards_per_entry_ratio() const {
	if (_mixed_cards_per_entry_ratio_seq->num() < 2) {
	return predict_young_cards_per_entry_ratio();
	} else {
	return get_new_prediction(_mixed_cards_per_entry_ratio_seq);
	}
	}

	size_t G1Analytics::predict_card_num(size_t rs_length, bool for_young_gc) const {
	if (for_young_gc) {
	return (size_t) (rs_length * predict_young_cards_per_entry_ratio());
	} else {
	return (size_t) (rs_length * predict_mixed_cards_per_entry_ratio());
	}
	}

	double G1Analytics::predict_rs_scan_time_ms(size_t card_num, bool for_young_gc) const {
	if (for_young_gc) {
	return card_num * get_new_prediction(_cost_per_entry_ms_seq);
	} else {
	return predict_mixed_rs_scan_time_ms(card_num);
	}
	}

	double G1Analytics::predict_mixed_rs_scan_time_ms(size_t card_num) const {
	if (_mixed_cost_per_entry_ms_seq->num() < 3) {
	return card_num * get_new_prediction(_cost_per_entry_ms_seq);
	} else {
	return card_num * get_new_prediction(_mixed_cost_per_entry_ms_seq);
	}
	}

	double G1Analytics::predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) const {
	if (_cost_per_byte_ms_during_cm_seq->num() < 3) {
	return (1.1 * bytes_to_copy) * get_new_prediction(_cost_per_byte_ms_seq);
	} else {
	return bytes_to_copy * get_new_prediction(_cost_per_byte_ms_during_cm_seq);
	}
	}

	double G1Analytics::predict_object_copy_time_ms(size_t bytes_to_copy, bool during_concurrent_mark) const {
	if (during_concurrent_mark) {
	return predict_object_copy_time_ms_during_cm(bytes_to_copy);
	} else {
	return bytes_to_copy * get_new_prediction(_cost_per_byte_ms_seq);
	}
	}

	double G1Analytics::predict_cost_per_byte_ms() const {
	return get_new_prediction(_cost_per_byte_ms_seq);
	}

	double G1Analytics::predict_constant_other_time_ms() const {
	return get_new_prediction(_constant_other_time_ms_seq);
	}

	double G1Analytics::predict_young_other_time_ms(size_t young_num) const {
	return young_num * get_new_prediction(_young_other_cost_per_region_ms_seq);
	}

	double G1Analytics::predict_non_young_other_time_ms(size_t non_young_num) const {
	return non_young_num * get_new_prediction(_non_young_other_cost_per_region_ms_seq);
	}

	double G1Analytics::predict_remark_time_ms() const {
	return get_new_prediction(_concurrent_mark_remark_times_ms);
	}

	double G1Analytics::predict_cleanup_time_ms() const {
	return get_new_prediction(_concurrent_mark_cleanup_times_ms);
	}

	size_t G1Analytics::predict_rs_lengths() const {
	return get_new_size_prediction(_rs_lengths_seq);
	}

	size_t G1Analytics::predict_pending_cards() const {
	return get_new_size_prediction(_pending_cards_seq);
	}

	double G1Analytics::last_known_gc_end_time_sec() const {
	return _recent_prev_end_times_for_all_gcs_sec->oldest();
	}

	void G1Analytics::update_recent_gc_times(double end_time_sec,
	double pause_time_ms) {
	_recent_gc_times_ms->add(pause_time_ms);
	_recent_prev_end_times_for_all_gcs_sec->add(end_time_sec);
	_prev_collection_pause_end_ms = end_time_sec * 1000.0;
	}

	void G1Analytics::report_concurrent_mark_cleanup_times_ms(double ms) {
	_concurrent_mark_cleanup_times_ms->add(ms);
	}