| /* |
| * Copyright (c) 2016, 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. |
| * |
| */ |
| |
| #ifndef SHARE_VM_GC_G1_G1MEASUREMENTS_HPP |
| #define SHARE_VM_GC_G1_G1MEASUREMENTS_HPP |
| |
| #include "memory/allocation.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| |
| class TruncatedSeq; |
| class G1Predictions; |
| |
| class G1Analytics: public CHeapObj<mtGC> { |
| const static int TruncatedSeqLength = 10; |
| const static int NumPrevPausesForHeuristics = 10; |
| const G1Predictions* _predictor; |
| |
| // These exclude marking times. |
| TruncatedSeq* _recent_gc_times_ms; |
| |
| TruncatedSeq* _concurrent_mark_remark_times_ms; |
| TruncatedSeq* _concurrent_mark_cleanup_times_ms; |
| |
| TruncatedSeq* _alloc_rate_ms_seq; |
| double _prev_collection_pause_end_ms; |
| |
| TruncatedSeq* _rs_length_diff_seq; |
| TruncatedSeq* _cost_per_card_ms_seq; |
| TruncatedSeq* _cost_scan_hcc_seq; |
| TruncatedSeq* _young_cards_per_entry_ratio_seq; |
| TruncatedSeq* _mixed_cards_per_entry_ratio_seq; |
| TruncatedSeq* _cost_per_entry_ms_seq; |
| TruncatedSeq* _mixed_cost_per_entry_ms_seq; |
| TruncatedSeq* _cost_per_byte_ms_seq; |
| TruncatedSeq* _constant_other_time_ms_seq; |
| TruncatedSeq* _young_other_cost_per_region_ms_seq; |
| TruncatedSeq* _non_young_other_cost_per_region_ms_seq; |
| |
| TruncatedSeq* _pending_cards_seq; |
| TruncatedSeq* _rs_lengths_seq; |
| |
| TruncatedSeq* _cost_per_byte_ms_during_cm_seq; |
| |
| // Statistics kept per GC stoppage, pause or full. |
| TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec; |
| |
| // The ratio of gc time to elapsed time, computed over recent pauses, |
| // and the ratio for just the last pause. |
| double _recent_avg_pause_time_ratio; |
| double _last_pause_time_ratio; |
| |
| double get_new_prediction(TruncatedSeq const* seq) const; |
| size_t get_new_size_prediction(TruncatedSeq const* seq) const; |
| |
| public: |
| G1Analytics(const G1Predictions* predictor); |
| |
| double prev_collection_pause_end_ms() const { |
| return _prev_collection_pause_end_ms; |
| } |
| |
| double recent_avg_pause_time_ratio() const { |
| return _recent_avg_pause_time_ratio; |
| } |
| |
| double last_pause_time_ratio() const { |
| return _last_pause_time_ratio; |
| } |
| |
| uint number_of_recorded_pause_times() const { |
| return NumPrevPausesForHeuristics; |
| } |
| |
| void append_prev_collection_pause_end_ms(double ms) { |
| _prev_collection_pause_end_ms += ms; |
| } |
| |
| void report_concurrent_mark_remark_times_ms(double ms); |
| void report_concurrent_mark_cleanup_times_ms(double ms); |
| void report_alloc_rate_ms(double alloc_rate); |
| void report_cost_per_card_ms(double cost_per_card_ms); |
| void report_cost_scan_hcc(double cost_scan_hcc); |
| void report_cost_per_entry_ms(double cost_per_entry_ms, bool last_gc_was_young); |
| void report_cards_per_entry_ratio(double cards_per_entry_ratio, bool last_gc_was_young); |
| void report_rs_length_diff(double rs_length_diff); |
| void report_cost_per_byte_ms(double cost_per_byte_ms, bool in_marking_window); |
| void report_young_other_cost_per_region_ms(double other_cost_per_region_ms); |
| void report_non_young_other_cost_per_region_ms(double other_cost_per_region_ms); |
| void report_constant_other_time_ms(double constant_other_time_ms); |
| void report_pending_cards(double pending_cards); |
| void report_rs_lengths(double rs_lengths); |
| |
| size_t predict_rs_length_diff() const; |
| |
| double predict_alloc_rate_ms() const; |
| int num_alloc_rate_ms() const; |
| |
| double predict_cost_per_card_ms() const; |
| |
| double predict_scan_hcc_ms() const; |
| |
| double predict_rs_update_time_ms(size_t pending_cards) const; |
| |
| double predict_young_cards_per_entry_ratio() const; |
| |
| double predict_mixed_cards_per_entry_ratio() const; |
| |
| size_t predict_card_num(size_t rs_length, bool gcs_are_young) const; |
| |
| double predict_rs_scan_time_ms(size_t card_num, bool gcs_are_young) const; |
| |
| double predict_mixed_rs_scan_time_ms(size_t card_num) const; |
| |
| double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) const; |
| |
| double predict_object_copy_time_ms(size_t bytes_to_copy, bool during_concurrent_mark) const; |
| |
| double predict_constant_other_time_ms() const; |
| |
| double predict_young_other_time_ms(size_t young_num) const; |
| |
| double predict_non_young_other_time_ms(size_t non_young_num) const; |
| |
| double predict_remark_time_ms() const; |
| |
| double predict_cleanup_time_ms() const; |
| |
| size_t predict_rs_lengths() const; |
| size_t predict_pending_cards() const; |
| |
| double predict_cost_per_byte_ms() const; |
| |
| // Add a new GC of the given duration and end time to the record. |
| void update_recent_gc_times(double end_time_sec, double elapsed_ms); |
| void compute_pause_time_ratio(double interval_ms, double pause_time_ms); |
| |
| double last_known_gc_end_time_sec() const; |
| }; |
| |
| #endif // SHARE_VM_GC_G1_G1MEASUREMENTS_HPP |