Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 1610:79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
Summary: First, change the guarantee to raising a vm error. Second, set the interval dynamically, and based on the pause time target, if it is not set explicitly.
Reviewed-by: ysr, johnc
| author | tonyp |
|---|---|
| date | Fri, 07 May 2010 13:14:41 -0400 |
| parents | e9ff18c4ace7 |
| children | 215576b54709 |
| rev | line source |
|---|---|
| 342 | 1 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| 342 | 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_g1CollectorPolicy.cpp.incl" | |
| 27 | |
| 28 #define PREDICTIONS_VERBOSE 0 | |
| 29 | |
| 30 // <NEW PREDICTION> | |
| 31 | |
| 32 // Different defaults for different number of GC threads | |
| 33 // They were chosen by running GCOld and SPECjbb on debris with different | |
| 34 // numbers of GC threads and choosing them based on the results | |
| 35 | |
| 36 // all the same | |
| 37 static double rs_length_diff_defaults[] = { | |
| 38 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 | |
| 39 }; | |
| 40 | |
| 41 static double cost_per_card_ms_defaults[] = { | |
| 42 0.01, 0.005, 0.005, 0.003, 0.003, 0.002, 0.002, 0.0015 | |
| 43 }; | |
| 44 | |
| 45 // all the same | |
| 46 static double fully_young_cards_per_entry_ratio_defaults[] = { | |
| 47 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 | |
| 48 }; | |
| 49 | |
| 50 static double cost_per_entry_ms_defaults[] = { | |
| 51 0.015, 0.01, 0.01, 0.008, 0.008, 0.0055, 0.0055, 0.005 | |
| 52 }; | |
| 53 | |
| 54 static double cost_per_byte_ms_defaults[] = { | |
| 55 0.00006, 0.00003, 0.00003, 0.000015, 0.000015, 0.00001, 0.00001, 0.000009 | |
| 56 }; | |
| 57 | |
| 58 // these should be pretty consistent | |
| 59 static double constant_other_time_ms_defaults[] = { | |
| 60 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0 | |
| 61 }; | |
| 62 | |
| 63 | |
| 64 static double young_other_cost_per_region_ms_defaults[] = { | |
| 65 0.3, 0.2, 0.2, 0.15, 0.15, 0.12, 0.12, 0.1 | |
| 66 }; | |
| 67 | |
| 68 static double non_young_other_cost_per_region_ms_defaults[] = { | |
| 69 1.0, 0.7, 0.7, 0.5, 0.5, 0.42, 0.42, 0.30 | |
| 70 }; | |
| 71 | |
| 72 // </NEW PREDICTION> | |
| 73 | |
| 74 G1CollectorPolicy::G1CollectorPolicy() : | |
| 75 _parallel_gc_threads((ParallelGCThreads > 0) ? ParallelGCThreads : 1), | |
| 76 _n_pauses(0), | |
| 77 _recent_CH_strong_roots_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 78 _recent_G1_strong_roots_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 79 _recent_evac_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 80 _recent_pause_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 81 _recent_rs_sizes(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 82 _recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 83 _all_pause_times_ms(new NumberSeq()), | |
| 84 _stop_world_start(0.0), | |
| 85 _all_stop_world_times_ms(new NumberSeq()), | |
| 86 _all_yield_times_ms(new NumberSeq()), | |
| 87 | |
| 88 _all_mod_union_times_ms(new NumberSeq()), | |
| 89 | |
| 677 | 90 _summary(new Summary()), |
| 91 _abandoned_summary(new AbandonedSummary()), | |
| 342 | 92 |
|
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
93 #ifndef PRODUCT |
| 342 | 94 _cur_clear_ct_time_ms(0.0), |
|
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
95 _min_clear_cc_time_ms(-1.0), |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
96 _max_clear_cc_time_ms(-1.0), |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
97 _cur_clear_cc_time_ms(0.0), |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
98 _cum_clear_cc_time_ms(0.0), |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
99 _num_cc_clears(0L), |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
100 #endif |
| 342 | 101 |
| 102 _region_num_young(0), | |
| 103 _region_num_tenured(0), | |
| 104 _prev_region_num_young(0), | |
| 105 _prev_region_num_tenured(0), | |
| 106 | |
| 107 _aux_num(10), | |
| 108 _all_aux_times_ms(new NumberSeq[_aux_num]), | |
| 109 _cur_aux_start_times_ms(new double[_aux_num]), | |
| 110 _cur_aux_times_ms(new double[_aux_num]), | |
| 111 _cur_aux_times_set(new bool[_aux_num]), | |
| 112 | |
| 113 _concurrent_mark_init_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 114 _concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 115 _concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 116 | |
| 117 // <NEW PREDICTION> | |
| 118 | |
| 119 _alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 120 _prev_collection_pause_end_ms(0.0), | |
| 121 _pending_card_diff_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 122 _rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 123 _cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 124 _fully_young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 125 _partially_young_cards_per_entry_ratio_seq( | |
| 126 new TruncatedSeq(TruncatedSeqLength)), | |
| 127 _cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 128 _partially_young_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 129 _cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 130 _cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 131 _constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 132 _young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 133 _non_young_other_cost_per_region_ms_seq( | |
| 134 new TruncatedSeq(TruncatedSeqLength)), | |
| 135 | |
| 136 _pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 137 _scanned_cards_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 138 _rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 139 | |
| 751 | 140 _pause_time_target_ms((double) MaxGCPauseMillis), |
| 342 | 141 |
| 142 // </NEW PREDICTION> | |
| 143 | |
| 144 _in_young_gc_mode(false), | |
| 145 _full_young_gcs(true), | |
| 146 _full_young_pause_num(0), | |
| 147 _partial_young_pause_num(0), | |
| 148 | |
| 149 _during_marking(false), | |
| 150 _in_marking_window(false), | |
| 151 _in_marking_window_im(false), | |
| 152 | |
| 153 _known_garbage_ratio(0.0), | |
| 154 _known_garbage_bytes(0), | |
| 155 | |
| 156 _young_gc_eff_seq(new TruncatedSeq(TruncatedSeqLength)), | |
| 157 _target_pause_time_ms(-1.0), | |
| 158 | |
| 159 _recent_prev_end_times_for_all_gcs_sec(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 160 | |
| 161 _recent_CS_bytes_used_before(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 162 _recent_CS_bytes_surviving(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
| 163 | |
| 164 _recent_avg_pause_time_ratio(0.0), | |
| 165 _num_markings(0), | |
| 166 _n_marks(0), | |
| 167 _n_pauses_at_mark_end(0), | |
| 168 | |
| 169 _all_full_gc_times_ms(new NumberSeq()), | |
| 170 | |
| 171 // G1PausesBtwnConcMark defaults to -1 | |
| 172 // so the hack is to do the cast QQQ FIXME | |
| 173 _pauses_btwn_concurrent_mark((size_t)G1PausesBtwnConcMark), | |
| 174 _n_marks_since_last_pause(0), | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
175 _initiate_conc_mark_if_possible(false), |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
176 _during_initial_mark_pause(false), |
| 342 | 177 _should_revert_to_full_young_gcs(false), |
| 178 _last_full_young_gc(false), | |
| 179 | |
| 180 _prev_collection_pause_used_at_end_bytes(0), | |
| 181 | |
| 182 _collection_set(NULL), | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
183 _collection_set_size(0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
184 _collection_set_bytes_used_before(0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
185 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
186 // Incremental CSet attributes |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
187 _inc_cset_build_state(Inactive), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
188 _inc_cset_head(NULL), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
189 _inc_cset_tail(NULL), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
190 _inc_cset_size(0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
191 _inc_cset_young_index(0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
192 _inc_cset_bytes_used_before(0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
193 _inc_cset_max_finger(NULL), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
194 _inc_cset_recorded_young_bytes(0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
195 _inc_cset_recorded_rs_lengths(0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
196 _inc_cset_predicted_elapsed_time_ms(0.0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
197 _inc_cset_predicted_bytes_to_copy(0), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
198 |
| 342 | 199 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
| 200 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 201 #endif // _MSC_VER | |
| 202 | |
| 203 _short_lived_surv_rate_group(new SurvRateGroup(this, "Short Lived", | |
| 204 G1YoungSurvRateNumRegionsSummary)), | |
| 205 _survivor_surv_rate_group(new SurvRateGroup(this, "Survivor", | |
| 545 | 206 G1YoungSurvRateNumRegionsSummary)), |
| 342 | 207 // add here any more surv rate groups |
| 545 | 208 _recorded_survivor_regions(0), |
| 209 _recorded_survivor_head(NULL), | |
| 210 _recorded_survivor_tail(NULL), | |
| 1356 | 211 _survivors_age_table(true), |
| 212 | |
| 213 _gc_overhead_perc(0.0) | |
| 545 | 214 |
| 342 | 215 { |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
216 // Set up the region size and associated fields. Given that the |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
217 // policy is created before the heap, we have to set this up here, |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
218 // so it's done as soon as possible. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
219 HeapRegion::setup_heap_region_size(Arguments::min_heap_size()); |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1111
diff
changeset
|
220 HeapRegionRemSet::setup_remset_size(); |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
221 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
222 // Verify PLAB sizes |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
223 const uint region_size = HeapRegion::GrainWords; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
224 if (YoungPLABSize > region_size || OldPLABSize > region_size) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
225 char buffer[128]; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
226 jio_snprintf(buffer, sizeof(buffer), "%sPLABSize should be at most %u", |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
227 OldPLABSize > region_size ? "Old" : "Young", region_size); |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
228 vm_exit_during_initialization(buffer); |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
229 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
230 |
| 342 | 231 _recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime()); |
| 232 _prev_collection_pause_end_ms = os::elapsedTime() * 1000.0; | |
| 233 | |
| 234 _par_last_ext_root_scan_times_ms = new double[_parallel_gc_threads]; | |
| 235 _par_last_mark_stack_scan_times_ms = new double[_parallel_gc_threads]; | |
| 236 | |
| 237 _par_last_update_rs_start_times_ms = new double[_parallel_gc_threads]; | |
| 238 _par_last_update_rs_times_ms = new double[_parallel_gc_threads]; | |
| 239 _par_last_update_rs_processed_buffers = new double[_parallel_gc_threads]; | |
| 240 | |
| 241 _par_last_scan_rs_start_times_ms = new double[_parallel_gc_threads]; | |
| 242 _par_last_scan_rs_times_ms = new double[_parallel_gc_threads]; | |
| 243 _par_last_scan_new_refs_times_ms = new double[_parallel_gc_threads]; | |
| 244 | |
| 245 _par_last_obj_copy_times_ms = new double[_parallel_gc_threads]; | |
| 246 | |
| 247 _par_last_termination_times_ms = new double[_parallel_gc_threads]; | |
| 248 | |
| 249 // start conservatively | |
| 751 | 250 _expensive_region_limit_ms = 0.5 * (double) MaxGCPauseMillis; |
| 342 | 251 |
| 252 // <NEW PREDICTION> | |
| 253 | |
| 254 int index; | |
| 255 if (ParallelGCThreads == 0) | |
| 256 index = 0; | |
| 257 else if (ParallelGCThreads > 8) | |
| 258 index = 7; | |
| 259 else | |
| 260 index = ParallelGCThreads - 1; | |
| 261 | |
| 262 _pending_card_diff_seq->add(0.0); | |
| 263 _rs_length_diff_seq->add(rs_length_diff_defaults[index]); | |
| 264 _cost_per_card_ms_seq->add(cost_per_card_ms_defaults[index]); | |
| 265 _fully_young_cards_per_entry_ratio_seq->add( | |
| 266 fully_young_cards_per_entry_ratio_defaults[index]); | |
| 267 _cost_per_entry_ms_seq->add(cost_per_entry_ms_defaults[index]); | |
| 268 _cost_per_byte_ms_seq->add(cost_per_byte_ms_defaults[index]); | |
| 269 _constant_other_time_ms_seq->add(constant_other_time_ms_defaults[index]); | |
| 270 _young_other_cost_per_region_ms_seq->add( | |
| 271 young_other_cost_per_region_ms_defaults[index]); | |
| 272 _non_young_other_cost_per_region_ms_seq->add( | |
| 273 non_young_other_cost_per_region_ms_defaults[index]); | |
| 274 | |
| 275 // </NEW PREDICTION> | |
| 276 | |
|
1610
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
277 // Below, we might need to calculate the pause time target based on |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
278 // the pause interval. When we do so we are going to give G1 maximum |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
279 // flexibility and allow it to do pauses when it needs to. So, we'll |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
280 // arrange that the pause interval to be pause time target + 1 to |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
281 // ensure that a) the pause time target is maximized with respect to |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
282 // the pause interval and b) we maintain the invariant that pause |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
283 // time target < pause interval. If the user does not want this |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
284 // maximum flexibility, they will have to set the pause interval |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
285 // explicitly. |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
286 |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
287 // First make sure that, if either parameter is set, its value is |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
288 // reasonable. |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
289 if (!FLAG_IS_DEFAULT(MaxGCPauseMillis)) { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
290 if (MaxGCPauseMillis < 1) { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
291 vm_exit_during_initialization("MaxGCPauseMillis should be " |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
292 "greater than 0"); |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
293 } |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
294 } |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
295 if (!FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
296 if (GCPauseIntervalMillis < 1) { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
297 vm_exit_during_initialization("GCPauseIntervalMillis should be " |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
298 "greater than 0"); |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
299 } |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
300 } |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
301 |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
302 // Then, if the pause time target parameter was not set, set it to |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
303 // the default value. |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
304 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
305 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
306 // The default pause time target in G1 is 200ms |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
307 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200); |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
308 } else { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
309 // We do not allow the pause interval to be set without the |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
310 // pause time target |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
311 vm_exit_during_initialization("GCPauseIntervalMillis cannot be set " |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
312 "without setting MaxGCPauseMillis"); |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
313 } |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
314 } |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
315 |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
316 // Then, if the interval parameter was not set, set it according to |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
317 // the pause time target (this will also deal with the case when the |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
318 // pause time target is the default value). |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
319 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
320 FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1); |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
321 } |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
322 |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
323 // Finally, make sure that the two parameters are consistent. |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
324 if (MaxGCPauseMillis >= GCPauseIntervalMillis) { |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
325 char buffer[256]; |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
326 jio_snprintf(buffer, 256, |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
327 "MaxGCPauseMillis (%u) should be less than " |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
328 "GCPauseIntervalMillis (%u)", |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
329 MaxGCPauseMillis, GCPauseIntervalMillis); |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
330 vm_exit_during_initialization(buffer); |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
331 } |
|
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
332 |
| 751 | 333 double max_gc_time = (double) MaxGCPauseMillis / 1000.0; |
|
1610
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents:
1579
diff
changeset
|
334 double time_slice = (double) GCPauseIntervalMillis / 1000.0; |
| 342 | 335 _mmu_tracker = new G1MMUTrackerQueue(time_slice, max_gc_time); |
| 751 | 336 _sigma = (double) G1ConfidencePercent / 100.0; |
| 342 | 337 |
| 338 // start conservatively (around 50ms is about right) | |
| 339 _concurrent_mark_init_times_ms->add(0.05); | |
| 340 _concurrent_mark_remark_times_ms->add(0.05); | |
| 341 _concurrent_mark_cleanup_times_ms->add(0.20); | |
| 342 _tenuring_threshold = MaxTenuringThreshold; | |
| 343 | |
| 1282 | 344 // if G1FixedSurvivorSpaceSize is 0 which means the size is not |
| 345 // fixed, then _max_survivor_regions will be calculated at | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
346 // calculate_young_list_target_length during initialization |
| 1282 | 347 _max_survivor_regions = G1FixedSurvivorSpaceSize / HeapRegion::GrainBytes; |
| 545 | 348 |
| 1356 | 349 assert(GCTimeRatio > 0, |
| 350 "we should have set it to a default value set_g1_gc_flags() " | |
| 351 "if a user set it to 0"); | |
| 352 _gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio)); | |
| 353 | |
| 342 | 354 initialize_all(); |
| 355 } | |
| 356 | |
| 357 // Increment "i", mod "len" | |
| 358 static void inc_mod(int& i, int len) { | |
| 359 i++; if (i == len) i = 0; | |
| 360 } | |
| 361 | |
| 362 void G1CollectorPolicy::initialize_flags() { | |
| 363 set_min_alignment(HeapRegion::GrainBytes); | |
| 364 set_max_alignment(GenRemSet::max_alignment_constraint(rem_set_name())); | |
|
547
1e458753107d
6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
apetrusenko
parents:
545
diff
changeset
|
365 if (SurvivorRatio < 1) { |
|
1e458753107d
6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
apetrusenko
parents:
545
diff
changeset
|
366 vm_exit_during_initialization("Invalid survivor ratio specified"); |
|
1e458753107d
6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
apetrusenko
parents:
545
diff
changeset
|
367 } |
| 342 | 368 CollectorPolicy::initialize_flags(); |
| 369 } | |
| 370 | |
|
1285
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
371 // The easiest way to deal with the parsing of the NewSize / |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
372 // MaxNewSize / etc. parameteres is to re-use the code in the |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
373 // TwoGenerationCollectorPolicy class. This is similar to what |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
374 // ParallelScavenge does with its GenerationSizer class (see |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
375 // ParallelScavengeHeap::initialize()). We might change this in the |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
376 // future, but it's a good start. |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
377 class G1YoungGenSizer : public TwoGenerationCollectorPolicy { |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
378 size_t size_to_region_num(size_t byte_size) { |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
379 return MAX2((size_t) 1, byte_size / HeapRegion::GrainBytes); |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
380 } |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
381 |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
382 public: |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
383 G1YoungGenSizer() { |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
384 initialize_flags(); |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
385 initialize_size_info(); |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
386 } |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
387 |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
388 size_t min_young_region_num() { |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
389 return size_to_region_num(_min_gen0_size); |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
390 } |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
391 size_t initial_young_region_num() { |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
392 return size_to_region_num(_initial_gen0_size); |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
393 } |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
394 size_t max_young_region_num() { |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
395 return size_to_region_num(_max_gen0_size); |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
396 } |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
397 }; |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
398 |
| 342 | 399 void G1CollectorPolicy::init() { |
| 400 // Set aside an initial future to_space. | |
| 401 _g1 = G1CollectedHeap::heap(); | |
| 402 | |
| 403 assert(Heap_lock->owned_by_self(), "Locking discipline."); | |
| 404 | |
| 545 | 405 initialize_gc_policy_counters(); |
| 406 | |
| 342 | 407 if (G1Gen) { |
| 408 _in_young_gc_mode = true; | |
| 409 | |
|
1285
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
410 G1YoungGenSizer sizer; |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
411 size_t initial_region_num = sizer.initial_young_region_num(); |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
412 |
|
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
413 if (UseAdaptiveSizePolicy) { |
| 342 | 414 set_adaptive_young_list_length(true); |
| 415 _young_list_fixed_length = 0; | |
| 416 } else { | |
| 417 set_adaptive_young_list_length(false); | |
|
1285
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
418 _young_list_fixed_length = initial_region_num; |
| 342 | 419 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
420 _free_regions_at_end_of_collection = _g1->free_regions(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
421 calculate_young_list_min_length(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
422 guarantee( _young_list_min_length == 0, "invariant, not enough info" ); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
423 calculate_young_list_target_length(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
424 } else { |
| 342 | 425 _young_list_fixed_length = 0; |
| 426 _in_young_gc_mode = false; | |
| 427 } | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
428 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
429 // We may immediately start allocating regions and placing them on the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
430 // collection set list. Initialize the per-collection set info |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
431 start_incremental_cset_building(); |
| 342 | 432 } |
| 433 | |
| 545 | 434 // Create the jstat counters for the policy. |
| 435 void G1CollectorPolicy::initialize_gc_policy_counters() | |
| 436 { | |
| 437 _gc_policy_counters = new GCPolicyCounters("GarbageFirst", 1, 2 + G1Gen); | |
| 438 } | |
| 439 | |
| 342 | 440 void G1CollectorPolicy::calculate_young_list_min_length() { |
| 441 _young_list_min_length = 0; | |
| 442 | |
| 443 if (!adaptive_young_list_length()) | |
| 444 return; | |
| 445 | |
| 446 if (_alloc_rate_ms_seq->num() > 3) { | |
| 447 double now_sec = os::elapsedTime(); | |
| 448 double when_ms = _mmu_tracker->when_max_gc_sec(now_sec) * 1000.0; | |
| 449 double alloc_rate_ms = predict_alloc_rate_ms(); | |
| 450 int min_regions = (int) ceil(alloc_rate_ms * when_ms); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
451 int current_region_num = (int) _g1->young_list()->length(); |
| 342 | 452 _young_list_min_length = min_regions + current_region_num; |
| 453 } | |
| 454 } | |
| 455 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
456 void G1CollectorPolicy::calculate_young_list_target_length() { |
| 342 | 457 if (adaptive_young_list_length()) { |
| 458 size_t rs_lengths = (size_t) get_new_prediction(_rs_lengths_seq); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
459 calculate_young_list_target_length(rs_lengths); |
| 342 | 460 } else { |
| 461 if (full_young_gcs()) | |
| 462 _young_list_target_length = _young_list_fixed_length; | |
| 463 else | |
| 464 _young_list_target_length = _young_list_fixed_length / 2; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
465 |
| 342 | 466 _young_list_target_length = MAX2(_young_list_target_length, (size_t)1); |
| 467 } | |
| 545 | 468 calculate_survivors_policy(); |
| 342 | 469 } |
| 470 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
471 void G1CollectorPolicy::calculate_young_list_target_length(size_t rs_lengths) { |
| 342 | 472 guarantee( adaptive_young_list_length(), "pre-condition" ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
473 guarantee( !_in_marking_window || !_last_full_young_gc, "invariant" ); |
| 342 | 474 |
| 475 double start_time_sec = os::elapsedTime(); | |
| 1282 | 476 size_t min_reserve_perc = MAX2((size_t)2, (size_t)G1ReservePercent); |
| 342 | 477 min_reserve_perc = MIN2((size_t) 50, min_reserve_perc); |
| 478 size_t reserve_regions = | |
| 479 (size_t) ((double) min_reserve_perc * (double) _g1->n_regions() / 100.0); | |
| 480 | |
| 481 if (full_young_gcs() && _free_regions_at_end_of_collection > 0) { | |
| 482 // we are in fully-young mode and there are free regions in the heap | |
| 483 | |
| 545 | 484 double survivor_regions_evac_time = |
| 485 predict_survivor_regions_evac_time(); | |
| 486 | |
| 342 | 487 double target_pause_time_ms = _mmu_tracker->max_gc_time() * 1000.0; |
| 488 size_t pending_cards = (size_t) get_new_prediction(_pending_cards_seq); | |
| 489 size_t adj_rs_lengths = rs_lengths + predict_rs_length_diff(); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
490 size_t scanned_cards = predict_young_card_num(adj_rs_lengths); |
| 545 | 491 double base_time_ms = predict_base_elapsed_time_ms(pending_cards, scanned_cards) |
| 492 + survivor_regions_evac_time; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
493 |
| 342 | 494 // the result |
| 495 size_t final_young_length = 0; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
496 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
497 size_t init_free_regions = |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
498 MAX2((size_t)0, _free_regions_at_end_of_collection - reserve_regions); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
499 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
500 // if we're still under the pause target... |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
501 if (base_time_ms <= target_pause_time_ms) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
502 // We make sure that the shortest young length that makes sense |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
503 // fits within the target pause time. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
504 size_t min_young_length = 1; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
505 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
506 if (predict_will_fit(min_young_length, base_time_ms, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
507 init_free_regions, target_pause_time_ms)) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
508 // The shortest young length will fit within the target pause time; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
509 // we'll now check whether the absolute maximum number of young |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
510 // regions will fit in the target pause time. If not, we'll do |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
511 // a binary search between min_young_length and max_young_length |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
512 size_t abs_max_young_length = _free_regions_at_end_of_collection - 1; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
513 size_t max_young_length = abs_max_young_length; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
514 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
515 if (max_young_length > min_young_length) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
516 // Let's check if the initial max young length will fit within the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
517 // target pause. If so then there is no need to search for a maximal |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
518 // young length - we'll return the initial maximum |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
519 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
520 if (predict_will_fit(max_young_length, base_time_ms, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
521 init_free_regions, target_pause_time_ms)) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
522 // The maximum young length will satisfy the target pause time. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
523 // We are done so set min young length to this maximum length. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
524 // The code after the loop will then set final_young_length using |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
525 // the value cached in the minimum length. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
526 min_young_length = max_young_length; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
527 } else { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
528 // The maximum possible number of young regions will not fit within |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
529 // the target pause time so let's search.... |
| 342 | 530 |
| 531 size_t diff = (max_young_length - min_young_length) / 2; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
532 max_young_length = min_young_length + diff; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
533 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
534 while (max_young_length > min_young_length) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
535 if (predict_will_fit(max_young_length, base_time_ms, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
536 init_free_regions, target_pause_time_ms)) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
537 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
538 // The current max young length will fit within the target |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
539 // pause time. Note we do not exit the loop here. By setting |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
540 // min = max, and then increasing the max below means that |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
541 // we will continue searching for an upper bound in the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
542 // range [max..max+diff] |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
543 min_young_length = max_young_length; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
544 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
545 diff = (max_young_length - min_young_length) / 2; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
546 max_young_length = min_young_length + diff; |
| 342 | 547 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
548 // the above loop found a maximal young length that will fit |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
549 // within the target pause time. |
| 342 | 550 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
551 assert(min_young_length <= abs_max_young_length, "just checking"); |
| 342 | 552 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
553 final_young_length = min_young_length; |
| 342 | 554 } |
| 555 } | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
556 // and we're done! |
| 342 | 557 |
| 558 // we should have at least one region in the target young length | |
| 545 | 559 _young_list_target_length = |
| 560 MAX2((size_t) 1, final_young_length + _recorded_survivor_regions); | |
| 342 | 561 |
| 562 // let's keep an eye of how long we spend on this calculation | |
| 563 // right now, I assume that we'll print it when we need it; we | |
| 564 // should really adde it to the breakdown of a pause | |
| 565 double end_time_sec = os::elapsedTime(); | |
| 566 double elapsed_time_ms = (end_time_sec - start_time_sec) * 1000.0; | |
| 567 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
568 #ifdef TRACE_CALC_YOUNG_LENGTH |
| 342 | 569 // leave this in for debugging, just in case |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
570 gclog_or_tty->print_cr("target = %1.1lf ms, young = " SIZE_FORMAT ", " |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
571 "elapsed %1.2lf ms, (%s%s) " SIZE_FORMAT SIZE_FORMAT, |
| 342 | 572 target_pause_time_ms, |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
573 _young_list_target_length |
| 342 | 574 elapsed_time_ms, |
| 575 full_young_gcs() ? "full" : "partial", | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
576 during_initial_mark_pause() ? " i-m" : "", |
| 545 | 577 _in_marking_window, |
| 578 _in_marking_window_im); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
579 #endif // TRACE_CALC_YOUNG_LENGTH |
| 342 | 580 |
| 581 if (_young_list_target_length < _young_list_min_length) { | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
582 // bummer; this means that, if we do a pause when the maximal |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
583 // length dictates, we'll violate the pause spacing target (the |
| 342 | 584 // min length was calculate based on the application's current |
| 585 // alloc rate); | |
| 586 | |
| 587 // so, we have to bite the bullet, and allocate the minimum | |
| 588 // number. We'll violate our target, but we just can't meet it. | |
| 589 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
590 #ifdef TRACE_CALC_YOUNG_LENGTH |
| 342 | 591 // leave this in for debugging, just in case |
| 592 gclog_or_tty->print_cr("adjusted target length from " | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
593 SIZE_FORMAT " to " SIZE_FORMAT, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
594 _young_list_target_length, _young_list_min_length); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
595 #endif // TRACE_CALC_YOUNG_LENGTH |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
596 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
597 _young_list_target_length = _young_list_min_length; |
| 342 | 598 } |
| 599 } else { | |
| 600 // we are in a partially-young mode or we've run out of regions (due | |
| 601 // to evacuation failure) | |
| 602 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
603 #ifdef TRACE_CALC_YOUNG_LENGTH |
| 342 | 604 // leave this in for debugging, just in case |
| 605 gclog_or_tty->print_cr("(partial) setting target to " SIZE_FORMAT | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
606 _young_list_min_length); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
607 #endif // TRACE_CALC_YOUNG_LENGTH |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
608 // we'll do the pause as soon as possible by choosing the minimum |
| 342 | 609 _young_list_target_length = |
| 610 MAX2(_young_list_min_length, (size_t) 1); | |
| 611 } | |
| 612 | |
| 613 _rs_lengths_prediction = rs_lengths; | |
| 614 } | |
| 615 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
616 // This is used by: calculate_young_list_target_length(rs_length). It |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
617 // returns true iff: |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
618 // the predicted pause time for the given young list will not overflow |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
619 // the target pause time |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
620 // and: |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
621 // the predicted amount of surviving data will not overflow the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
622 // the amount of free space available for survivor regions. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
623 // |
| 342 | 624 bool |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
625 G1CollectorPolicy::predict_will_fit(size_t young_length, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
626 double base_time_ms, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
627 size_t init_free_regions, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
628 double target_pause_time_ms) { |
| 342 | 629 |
| 630 if (young_length >= init_free_regions) | |
| 631 // end condition 1: not enough space for the young regions | |
| 632 return false; | |
| 633 | |
| 634 double accum_surv_rate_adj = 0.0; | |
| 635 double accum_surv_rate = | |
| 636 accum_yg_surv_rate_pred((int)(young_length - 1)) - accum_surv_rate_adj; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
637 |
| 342 | 638 size_t bytes_to_copy = |
| 639 (size_t) (accum_surv_rate * (double) HeapRegion::GrainBytes); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
640 |
| 342 | 641 double copy_time_ms = predict_object_copy_time_ms(bytes_to_copy); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
642 |
| 342 | 643 double young_other_time_ms = |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
644 predict_young_other_time_ms(young_length); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
645 |
| 342 | 646 double pause_time_ms = |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
647 base_time_ms + copy_time_ms + young_other_time_ms; |
| 342 | 648 |
| 649 if (pause_time_ms > target_pause_time_ms) | |
| 650 // end condition 2: over the target pause time | |
| 651 return false; | |
| 652 | |
| 653 size_t free_bytes = | |
| 654 (init_free_regions - young_length) * HeapRegion::GrainBytes; | |
| 655 | |
| 656 if ((2.0 + sigma()) * (double) bytes_to_copy > (double) free_bytes) | |
| 657 // end condition 3: out of to-space (conservatively) | |
| 658 return false; | |
| 659 | |
| 660 // success! | |
| 661 return true; | |
| 662 } | |
| 663 | |
| 545 | 664 double G1CollectorPolicy::predict_survivor_regions_evac_time() { |
| 665 double survivor_regions_evac_time = 0.0; | |
| 666 for (HeapRegion * r = _recorded_survivor_head; | |
| 667 r != NULL && r != _recorded_survivor_tail->get_next_young_region(); | |
| 668 r = r->get_next_young_region()) { | |
| 669 survivor_regions_evac_time += predict_region_elapsed_time_ms(r, true); | |
| 670 } | |
| 671 return survivor_regions_evac_time; | |
| 672 } | |
| 673 | |
| 342 | 674 void G1CollectorPolicy::check_prediction_validity() { |
| 675 guarantee( adaptive_young_list_length(), "should not call this otherwise" ); | |
| 676 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
677 size_t rs_lengths = _g1->young_list()->sampled_rs_lengths(); |
| 342 | 678 if (rs_lengths > _rs_lengths_prediction) { |
| 679 // add 10% to avoid having to recalculate often | |
| 680 size_t rs_lengths_prediction = rs_lengths * 1100 / 1000; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
681 calculate_young_list_target_length(rs_lengths_prediction); |
| 342 | 682 } |
| 683 } | |
| 684 | |
| 685 HeapWord* G1CollectorPolicy::mem_allocate_work(size_t size, | |
| 686 bool is_tlab, | |
| 687 bool* gc_overhead_limit_was_exceeded) { | |
| 688 guarantee(false, "Not using this policy feature yet."); | |
| 689 return NULL; | |
| 690 } | |
| 691 | |
| 692 // This method controls how a collector handles one or more | |
| 693 // of its generations being fully allocated. | |
| 694 HeapWord* G1CollectorPolicy::satisfy_failed_allocation(size_t size, | |
| 695 bool is_tlab) { | |
| 696 guarantee(false, "Not using this policy feature yet."); | |
| 697 return NULL; | |
| 698 } | |
| 699 | |
| 700 | |
| 701 #ifndef PRODUCT | |
| 702 bool G1CollectorPolicy::verify_young_ages() { | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
703 HeapRegion* head = _g1->young_list()->first_region(); |
| 342 | 704 return |
| 705 verify_young_ages(head, _short_lived_surv_rate_group); | |
| 706 // also call verify_young_ages on any additional surv rate groups | |
| 707 } | |
| 708 | |
| 709 bool | |
| 710 G1CollectorPolicy::verify_young_ages(HeapRegion* head, | |
| 711 SurvRateGroup *surv_rate_group) { | |
| 712 guarantee( surv_rate_group != NULL, "pre-condition" ); | |
| 713 | |
| 714 const char* name = surv_rate_group->name(); | |
| 715 bool ret = true; | |
| 716 int prev_age = -1; | |
| 717 | |
| 718 for (HeapRegion* curr = head; | |
| 719 curr != NULL; | |
| 720 curr = curr->get_next_young_region()) { | |
| 721 SurvRateGroup* group = curr->surv_rate_group(); | |
| 722 if (group == NULL && !curr->is_survivor()) { | |
| 723 gclog_or_tty->print_cr("## %s: encountered NULL surv_rate_group", name); | |
| 724 ret = false; | |
| 725 } | |
| 726 | |
| 727 if (surv_rate_group == group) { | |
| 728 int age = curr->age_in_surv_rate_group(); | |
| 729 | |
| 730 if (age < 0) { | |
| 731 gclog_or_tty->print_cr("## %s: encountered negative age", name); | |
| 732 ret = false; | |
| 733 } | |
| 734 | |
| 735 if (age <= prev_age) { | |
| 736 gclog_or_tty->print_cr("## %s: region ages are not strictly increasing " | |
| 737 "(%d, %d)", name, age, prev_age); | |
| 738 ret = false; | |
| 739 } | |
| 740 prev_age = age; | |
| 741 } | |
| 742 } | |
| 743 | |
| 744 return ret; | |
| 745 } | |
| 746 #endif // PRODUCT | |
| 747 | |
| 748 void G1CollectorPolicy::record_full_collection_start() { | |
| 749 _cur_collection_start_sec = os::elapsedTime(); | |
| 750 // Release the future to-space so that it is available for compaction into. | |
| 751 _g1->set_full_collection(); | |
| 752 } | |
| 753 | |
| 754 void G1CollectorPolicy::record_full_collection_end() { | |
| 755 // Consider this like a collection pause for the purposes of allocation | |
| 756 // since last pause. | |
| 757 double end_sec = os::elapsedTime(); | |
| 758 double full_gc_time_sec = end_sec - _cur_collection_start_sec; | |
| 759 double full_gc_time_ms = full_gc_time_sec * 1000.0; | |
| 760 | |
| 761 _all_full_gc_times_ms->add(full_gc_time_ms); | |
| 762 | |
|
595
3698e8f47799
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
547
diff
changeset
|
763 update_recent_gc_times(end_sec, full_gc_time_ms); |
| 342 | 764 |
| 765 _g1->clear_full_collection(); | |
| 766 | |
| 767 // "Nuke" the heuristics that control the fully/partially young GC | |
| 768 // transitions and make sure we start with fully young GCs after the | |
| 769 // Full GC. | |
| 770 set_full_young_gcs(true); | |
| 771 _last_full_young_gc = false; | |
| 772 _should_revert_to_full_young_gcs = false; | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
773 clear_initiate_conc_mark_if_possible(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
774 clear_during_initial_mark_pause(); |
| 342 | 775 _known_garbage_bytes = 0; |
| 776 _known_garbage_ratio = 0.0; | |
| 777 _in_marking_window = false; | |
| 778 _in_marking_window_im = false; | |
| 779 | |
| 780 _short_lived_surv_rate_group->start_adding_regions(); | |
| 781 // also call this on any additional surv rate groups | |
| 782 | |
| 545 | 783 record_survivor_regions(0, NULL, NULL); |
| 784 | |
| 342 | 785 _prev_region_num_young = _region_num_young; |
| 786 _prev_region_num_tenured = _region_num_tenured; | |
| 787 | |
| 788 _free_regions_at_end_of_collection = _g1->free_regions(); | |
| 545 | 789 // Reset survivors SurvRateGroup. |
| 790 _survivor_surv_rate_group->reset(); | |
| 342 | 791 calculate_young_list_min_length(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
792 calculate_young_list_target_length(); |
| 342 | 793 } |
| 794 | |
| 795 void G1CollectorPolicy::record_before_bytes(size_t bytes) { | |
| 796 _bytes_in_to_space_before_gc += bytes; | |
| 797 } | |
| 798 | |
| 799 void G1CollectorPolicy::record_after_bytes(size_t bytes) { | |
| 800 _bytes_in_to_space_after_gc += bytes; | |
| 801 } | |
| 802 | |
| 803 void G1CollectorPolicy::record_stop_world_start() { | |
| 804 _stop_world_start = os::elapsedTime(); | |
| 805 } | |
| 806 | |
| 807 void G1CollectorPolicy::record_collection_pause_start(double start_time_sec, | |
| 808 size_t start_used) { | |
| 809 if (PrintGCDetails) { | |
| 810 gclog_or_tty->stamp(PrintGCTimeStamps); | |
| 811 gclog_or_tty->print("[GC pause"); | |
| 812 if (in_young_gc_mode()) | |
| 813 gclog_or_tty->print(" (%s)", full_young_gcs() ? "young" : "partial"); | |
| 814 } | |
| 815 | |
| 816 assert(_g1->used_regions() == _g1->recalculate_used_regions(), | |
| 817 "sanity"); | |
| 636 | 818 assert(_g1->used() == _g1->recalculate_used(), "sanity"); |
| 342 | 819 |
| 820 double s_w_t_ms = (start_time_sec - _stop_world_start) * 1000.0; | |
| 821 _all_stop_world_times_ms->add(s_w_t_ms); | |
| 822 _stop_world_start = 0.0; | |
| 823 | |
| 824 _cur_collection_start_sec = start_time_sec; | |
| 825 _cur_collection_pause_used_at_start_bytes = start_used; | |
| 826 _cur_collection_pause_used_regions_at_start = _g1->used_regions(); | |
| 827 _pending_cards = _g1->pending_card_num(); | |
| 828 _max_pending_cards = _g1->max_pending_card_num(); | |
| 829 | |
| 830 _bytes_in_to_space_before_gc = 0; | |
| 831 _bytes_in_to_space_after_gc = 0; | |
| 832 _bytes_in_collection_set_before_gc = 0; | |
| 833 | |
| 834 #ifdef DEBUG | |
| 835 // initialise these to something well known so that we can spot | |
| 836 // if they are not set properly | |
| 837 | |
| 838 for (int i = 0; i < _parallel_gc_threads; ++i) { | |
| 839 _par_last_ext_root_scan_times_ms[i] = -666.0; | |
| 840 _par_last_mark_stack_scan_times_ms[i] = -666.0; | |
| 841 _par_last_update_rs_start_times_ms[i] = -666.0; | |
| 842 _par_last_update_rs_times_ms[i] = -666.0; | |
| 843 _par_last_update_rs_processed_buffers[i] = -666.0; | |
| 844 _par_last_scan_rs_start_times_ms[i] = -666.0; | |
| 845 _par_last_scan_rs_times_ms[i] = -666.0; | |
| 846 _par_last_scan_new_refs_times_ms[i] = -666.0; | |
| 847 _par_last_obj_copy_times_ms[i] = -666.0; | |
| 848 _par_last_termination_times_ms[i] = -666.0; | |
| 849 } | |
| 850 #endif | |
| 851 | |
| 852 for (int i = 0; i < _aux_num; ++i) { | |
| 853 _cur_aux_times_ms[i] = 0.0; | |
| 854 _cur_aux_times_set[i] = false; | |
| 855 } | |
| 856 | |
| 857 _satb_drain_time_set = false; | |
| 858 _last_satb_drain_processed_buffers = -1; | |
| 859 | |
| 860 if (in_young_gc_mode()) | |
| 861 _last_young_gc_full = false; | |
| 862 | |
| 863 // do that for any other surv rate groups | |
| 864 _short_lived_surv_rate_group->stop_adding_regions(); | |
| 1282 | 865 _survivors_age_table.clear(); |
| 545 | 866 |
| 342 | 867 assert( verify_young_ages(), "region age verification" ); |
| 868 } | |
| 869 | |
| 870 void G1CollectorPolicy::record_mark_closure_time(double mark_closure_time_ms) { | |
| 871 _mark_closure_time_ms = mark_closure_time_ms; | |
| 872 } | |
| 873 | |
| 874 void G1CollectorPolicy::record_concurrent_mark_init_start() { | |
| 875 _mark_init_start_sec = os::elapsedTime(); | |
| 876 guarantee(!in_young_gc_mode(), "should not do be here in young GC mode"); | |
| 877 } | |
| 878 | |
| 879 void G1CollectorPolicy::record_concurrent_mark_init_end_pre(double | |
| 880 mark_init_elapsed_time_ms) { | |
| 881 _during_marking = true; | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
882 assert(!initiate_conc_mark_if_possible(), "we should have cleared it by now"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
883 clear_during_initial_mark_pause(); |
| 342 | 884 _cur_mark_stop_world_time_ms = mark_init_elapsed_time_ms; |
| 885 } | |
| 886 | |
| 887 void G1CollectorPolicy::record_concurrent_mark_init_end() { | |
| 888 double end_time_sec = os::elapsedTime(); | |
| 889 double elapsed_time_ms = (end_time_sec - _mark_init_start_sec) * 1000.0; | |
| 890 _concurrent_mark_init_times_ms->add(elapsed_time_ms); | |
| 891 record_concurrent_mark_init_end_pre(elapsed_time_ms); | |
| 892 | |
| 893 _mmu_tracker->add_pause(_mark_init_start_sec, end_time_sec, true); | |
| 894 } | |
| 895 | |
| 896 void G1CollectorPolicy::record_concurrent_mark_remark_start() { | |
| 897 _mark_remark_start_sec = os::elapsedTime(); | |
| 898 _during_marking = false; | |
| 899 } | |
| 900 | |
| 901 void G1CollectorPolicy::record_concurrent_mark_remark_end() { | |
| 902 double end_time_sec = os::elapsedTime(); | |
| 903 double elapsed_time_ms = (end_time_sec - _mark_remark_start_sec)*1000.0; | |
| 904 _concurrent_mark_remark_times_ms->add(elapsed_time_ms); | |
| 905 _cur_mark_stop_world_time_ms += elapsed_time_ms; | |
| 906 _prev_collection_pause_end_ms += elapsed_time_ms; | |
| 907 | |
| 908 _mmu_tracker->add_pause(_mark_remark_start_sec, end_time_sec, true); | |
| 909 } | |
| 910 | |
| 911 void G1CollectorPolicy::record_concurrent_mark_cleanup_start() { | |
| 912 _mark_cleanup_start_sec = os::elapsedTime(); | |
| 913 } | |
| 914 | |
| 915 void | |
| 916 G1CollectorPolicy::record_concurrent_mark_cleanup_end(size_t freed_bytes, | |
| 917 size_t max_live_bytes) { | |
| 918 record_concurrent_mark_cleanup_end_work1(freed_bytes, max_live_bytes); | |
| 919 record_concurrent_mark_cleanup_end_work2(); | |
| 920 } | |
| 921 | |
| 922 void | |
| 923 G1CollectorPolicy:: | |
| 924 record_concurrent_mark_cleanup_end_work1(size_t freed_bytes, | |
| 925 size_t max_live_bytes) { | |
| 926 if (_n_marks < 2) _n_marks++; | |
| 927 if (G1PolicyVerbose > 0) | |
| 928 gclog_or_tty->print_cr("At end of marking, max_live is " SIZE_FORMAT " MB " | |
| 929 " (of " SIZE_FORMAT " MB heap).", | |
| 930 max_live_bytes/M, _g1->capacity()/M); | |
| 931 } | |
| 932 | |
| 933 // The important thing about this is that it includes "os::elapsedTime". | |
| 934 void G1CollectorPolicy::record_concurrent_mark_cleanup_end_work2() { | |
| 935 double end_time_sec = os::elapsedTime(); | |
| 936 double elapsed_time_ms = (end_time_sec - _mark_cleanup_start_sec)*1000.0; | |
| 937 _concurrent_mark_cleanup_times_ms->add(elapsed_time_ms); | |
| 938 _cur_mark_stop_world_time_ms += elapsed_time_ms; | |
| 939 _prev_collection_pause_end_ms += elapsed_time_ms; | |
| 940 | |
| 941 _mmu_tracker->add_pause(_mark_cleanup_start_sec, end_time_sec, true); | |
| 942 | |
| 943 _num_markings++; | |
| 944 | |
| 945 // We did a marking, so reset the "since_last_mark" variables. | |
| 946 double considerConcMarkCost = 1.0; | |
| 947 // If there are available processors, concurrent activity is free... | |
| 948 if (Threads::number_of_non_daemon_threads() * 2 < | |
| 949 os::active_processor_count()) { | |
| 950 considerConcMarkCost = 0.0; | |
| 951 } | |
| 952 _n_pauses_at_mark_end = _n_pauses; | |
| 953 _n_marks_since_last_pause++; | |
| 954 } | |
| 955 | |
| 956 void | |
| 957 G1CollectorPolicy::record_concurrent_mark_cleanup_completed() { | |
| 958 if (in_young_gc_mode()) { | |
| 959 _should_revert_to_full_young_gcs = false; | |
| 960 _last_full_young_gc = true; | |
| 961 _in_marking_window = false; | |
| 962 if (adaptive_young_list_length()) | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
963 calculate_young_list_target_length(); |
| 342 | 964 } |
| 965 } | |
| 966 | |
| 967 void G1CollectorPolicy::record_concurrent_pause() { | |
| 968 if (_stop_world_start > 0.0) { | |
| 969 double yield_ms = (os::elapsedTime() - _stop_world_start) * 1000.0; | |
| 970 _all_yield_times_ms->add(yield_ms); | |
| 971 } | |
| 972 } | |
| 973 | |
| 974 void G1CollectorPolicy::record_concurrent_pause_end() { | |
| 975 } | |
| 976 | |
| 977 void G1CollectorPolicy::record_collection_pause_end_CH_strong_roots() { | |
| 978 _cur_CH_strong_roots_end_sec = os::elapsedTime(); | |
| 979 _cur_CH_strong_roots_dur_ms = | |
| 980 (_cur_CH_strong_roots_end_sec - _cur_collection_start_sec) * 1000.0; | |
| 981 } | |
| 982 | |
| 983 void G1CollectorPolicy::record_collection_pause_end_G1_strong_roots() { | |
| 984 _cur_G1_strong_roots_end_sec = os::elapsedTime(); | |
| 985 _cur_G1_strong_roots_dur_ms = | |
| 986 (_cur_G1_strong_roots_end_sec - _cur_CH_strong_roots_end_sec) * 1000.0; | |
| 987 } | |
| 988 | |
| 989 template<class T> | |
| 990 T sum_of(T* sum_arr, int start, int n, int N) { | |
| 991 T sum = (T)0; | |
| 992 for (int i = 0; i < n; i++) { | |
| 993 int j = (start + i) % N; | |
| 994 sum += sum_arr[j]; | |
| 995 } | |
| 996 return sum; | |
| 997 } | |
| 998 | |
| 999 void G1CollectorPolicy::print_par_stats (int level, | |
| 1000 const char* str, | |
| 1001 double* data, | |
| 1002 bool summary) { | |
| 1003 double min = data[0], max = data[0]; | |
| 1004 double total = 0.0; | |
| 1005 int j; | |
| 1006 for (j = 0; j < level; ++j) | |
| 1007 gclog_or_tty->print(" "); | |
| 1008 gclog_or_tty->print("[%s (ms):", str); | |
| 1009 for (uint i = 0; i < ParallelGCThreads; ++i) { | |
| 1010 double val = data[i]; | |
| 1011 if (val < min) | |
| 1012 min = val; | |
| 1013 if (val > max) | |
| 1014 max = val; | |
| 1015 total += val; | |
| 1016 gclog_or_tty->print(" %3.1lf", val); | |
| 1017 } | |
| 1018 if (summary) { | |
| 1019 gclog_or_tty->print_cr(""); | |
| 1020 double avg = total / (double) ParallelGCThreads; | |
| 1021 gclog_or_tty->print(" "); | |
| 1022 for (j = 0; j < level; ++j) | |
| 1023 gclog_or_tty->print(" "); | |
| 1024 gclog_or_tty->print("Avg: %5.1lf, Min: %5.1lf, Max: %5.1lf", | |
| 1025 avg, min, max); | |
| 1026 } | |
| 1027 gclog_or_tty->print_cr("]"); | |
| 1028 } | |
| 1029 | |
| 1030 void G1CollectorPolicy::print_par_buffers (int level, | |
| 1031 const char* str, | |
| 1032 double* data, | |
| 1033 bool summary) { | |
| 1034 double min = data[0], max = data[0]; | |
| 1035 double total = 0.0; | |
| 1036 int j; | |
| 1037 for (j = 0; j < level; ++j) | |
| 1038 gclog_or_tty->print(" "); | |
| 1039 gclog_or_tty->print("[%s :", str); | |
| 1040 for (uint i = 0; i < ParallelGCThreads; ++i) { | |
| 1041 double val = data[i]; | |
| 1042 if (val < min) | |
| 1043 min = val; | |
| 1044 if (val > max) | |
| 1045 max = val; | |
| 1046 total += val; | |
| 1047 gclog_or_tty->print(" %d", (int) val); | |
| 1048 } | |
| 1049 if (summary) { | |
| 1050 gclog_or_tty->print_cr(""); | |
| 1051 double avg = total / (double) ParallelGCThreads; | |
| 1052 gclog_or_tty->print(" "); | |
| 1053 for (j = 0; j < level; ++j) | |
| 1054 gclog_or_tty->print(" "); | |
| 1055 gclog_or_tty->print("Sum: %d, Avg: %d, Min: %d, Max: %d", | |
| 1056 (int)total, (int)avg, (int)min, (int)max); | |
| 1057 } | |
| 1058 gclog_or_tty->print_cr("]"); | |
| 1059 } | |
| 1060 | |
| 1061 void G1CollectorPolicy::print_stats (int level, | |
| 1062 const char* str, | |
| 1063 double value) { | |
| 1064 for (int j = 0; j < level; ++j) | |
| 1065 gclog_or_tty->print(" "); | |
| 1066 gclog_or_tty->print_cr("[%s: %5.1lf ms]", str, value); | |
| 1067 } | |
| 1068 | |
| 1069 void G1CollectorPolicy::print_stats (int level, | |
| 1070 const char* str, | |
| 1071 int value) { | |
| 1072 for (int j = 0; j < level; ++j) | |
| 1073 gclog_or_tty->print(" "); | |
| 1074 gclog_or_tty->print_cr("[%s: %d]", str, value); | |
| 1075 } | |
| 1076 | |
| 1077 double G1CollectorPolicy::avg_value (double* data) { | |
| 1078 if (ParallelGCThreads > 0) { | |
| 1079 double ret = 0.0; | |
| 1080 for (uint i = 0; i < ParallelGCThreads; ++i) | |
| 1081 ret += data[i]; | |
| 1082 return ret / (double) ParallelGCThreads; | |
| 1083 } else { | |
| 1084 return data[0]; | |
| 1085 } | |
| 1086 } | |
| 1087 | |
| 1088 double G1CollectorPolicy::max_value (double* data) { | |
| 1089 if (ParallelGCThreads > 0) { | |
| 1090 double ret = data[0]; | |
| 1091 for (uint i = 1; i < ParallelGCThreads; ++i) | |
| 1092 if (data[i] > ret) | |
| 1093 ret = data[i]; | |
| 1094 return ret; | |
| 1095 } else { | |
| 1096 return data[0]; | |
| 1097 } | |
| 1098 } | |
| 1099 | |
| 1100 double G1CollectorPolicy::sum_of_values (double* data) { | |
| 1101 if (ParallelGCThreads > 0) { | |
| 1102 double sum = 0.0; | |
| 1103 for (uint i = 0; i < ParallelGCThreads; i++) | |
| 1104 sum += data[i]; | |
| 1105 return sum; | |
| 1106 } else { | |
| 1107 return data[0]; | |
| 1108 } | |
| 1109 } | |
| 1110 | |
| 1111 double G1CollectorPolicy::max_sum (double* data1, | |
| 1112 double* data2) { | |
| 1113 double ret = data1[0] + data2[0]; | |
| 1114 | |
| 1115 if (ParallelGCThreads > 0) { | |
| 1116 for (uint i = 1; i < ParallelGCThreads; ++i) { | |
| 1117 double data = data1[i] + data2[i]; | |
| 1118 if (data > ret) | |
| 1119 ret = data; | |
| 1120 } | |
| 1121 } | |
| 1122 return ret; | |
| 1123 } | |
| 1124 | |
| 1125 // Anything below that is considered to be zero | |
| 1126 #define MIN_TIMER_GRANULARITY 0.0000001 | |
| 1127 | |
| 677 | 1128 void G1CollectorPolicy::record_collection_pause_end(bool abandoned) { |
| 342 | 1129 double end_time_sec = os::elapsedTime(); |
| 1130 double elapsed_ms = _last_pause_time_ms; | |
| 1131 bool parallel = ParallelGCThreads > 0; | |
| 1132 double evac_ms = (end_time_sec - _cur_G1_strong_roots_end_sec) * 1000.0; | |
| 1133 size_t rs_size = | |
| 1134 _cur_collection_pause_used_regions_at_start - collection_set_size(); | |
| 1135 size_t cur_used_bytes = _g1->used(); | |
| 1136 assert(cur_used_bytes == _g1->recalculate_used(), "It should!"); | |
| 1137 bool last_pause_included_initial_mark = false; | |
|
595
3698e8f47799
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
547
diff
changeset
|
1138 bool update_stats = !abandoned && !_g1->evacuation_failed(); |
| 342 | 1139 |
| 1140 #ifndef PRODUCT | |
| 1141 if (G1YoungSurvRateVerbose) { | |
| 1142 gclog_or_tty->print_cr(""); | |
| 1143 _short_lived_surv_rate_group->print(); | |
| 1144 // do that for any other surv rate groups too | |
| 1145 } | |
| 1146 #endif // PRODUCT | |
| 1147 | |
| 1148 if (in_young_gc_mode()) { | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1149 last_pause_included_initial_mark = during_initial_mark_pause(); |
| 342 | 1150 if (last_pause_included_initial_mark) |
| 1151 record_concurrent_mark_init_end_pre(0.0); | |
| 1152 | |
| 1153 size_t min_used_targ = | |
|
1283
1c72304f1885
6928073: G1: use existing command line parameters for marking cycle initiation
tonyp
parents:
1282
diff
changeset
|
1154 (_g1->capacity() / 100) * InitiatingHeapOccupancyPercent; |
| 342 | 1155 |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1156 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1157 if (!_g1->mark_in_progress() && !_last_full_young_gc) { |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1158 assert(!last_pause_included_initial_mark, "invariant"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1159 if (cur_used_bytes > min_used_targ && |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1160 cur_used_bytes > _prev_collection_pause_used_at_end_bytes) { |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1161 assert(!during_initial_mark_pause(), "we should not see this here"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1162 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1163 // Note: this might have already been set, if during the last |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1164 // pause we decided to start a cycle but at the beginning of |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1165 // this pause we decided to postpone it. That's OK. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1166 set_initiate_conc_mark_if_possible(); |
| 342 | 1167 } |
| 1168 } | |
| 1169 | |
| 1170 _prev_collection_pause_used_at_end_bytes = cur_used_bytes; | |
| 1171 } | |
| 1172 | |
| 1173 _mmu_tracker->add_pause(end_time_sec - elapsed_ms/1000.0, | |
| 1174 end_time_sec, false); | |
| 1175 | |
| 1176 guarantee(_cur_collection_pause_used_regions_at_start >= | |
| 1177 collection_set_size(), | |
| 1178 "Negative RS size?"); | |
| 1179 | |
| 1180 // This assert is exempted when we're doing parallel collection pauses, | |
| 1181 // because the fragmentation caused by the parallel GC allocation buffers | |
| 1182 // can lead to more memory being used during collection than was used | |
| 1183 // before. Best leave this out until the fragmentation problem is fixed. | |
| 1184 // Pauses in which evacuation failed can also lead to negative | |
| 1185 // collections, since no space is reclaimed from a region containing an | |
| 1186 // object whose evacuation failed. | |
| 1187 // Further, we're now always doing parallel collection. But I'm still | |
| 1188 // leaving this here as a placeholder for a more precise assertion later. | |
| 1189 // (DLD, 10/05.) | |
| 1190 assert((true || parallel) // Always using GC LABs now. | |
| 1191 || _g1->evacuation_failed() | |
| 1192 || _cur_collection_pause_used_at_start_bytes >= cur_used_bytes, | |
| 1193 "Negative collection"); | |
| 1194 | |
| 1195 size_t freed_bytes = | |
| 1196 _cur_collection_pause_used_at_start_bytes - cur_used_bytes; | |
| 1197 size_t surviving_bytes = _collection_set_bytes_used_before - freed_bytes; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1198 |
| 342 | 1199 double survival_fraction = |
| 1200 (double)surviving_bytes/ | |
| 1201 (double)_collection_set_bytes_used_before; | |
| 1202 | |
| 1203 _n_pauses++; | |
| 1204 | |
|
595
3698e8f47799
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
547
diff
changeset
|
1205 if (update_stats) { |
| 342 | 1206 _recent_CH_strong_roots_times_ms->add(_cur_CH_strong_roots_dur_ms); |
| 1207 _recent_G1_strong_roots_times_ms->add(_cur_G1_strong_roots_dur_ms); | |
| 1208 _recent_evac_times_ms->add(evac_ms); | |
| 1209 _recent_pause_times_ms->add(elapsed_ms); | |
| 1210 | |
| 1211 _recent_rs_sizes->add(rs_size); | |
| 1212 | |
| 1213 // We exempt parallel collection from this check because Alloc Buffer | |
| 1214 // fragmentation can produce negative collections. Same with evac | |
| 1215 // failure. | |
| 1216 // Further, we're now always doing parallel collection. But I'm still | |
| 1217 // leaving this here as a placeholder for a more precise assertion later. | |
| 1218 // (DLD, 10/05. | |
| 1219 assert((true || parallel) | |
| 1220 || _g1->evacuation_failed() | |
| 1221 || surviving_bytes <= _collection_set_bytes_used_before, | |
| 1222 "Or else negative collection!"); | |
| 1223 _recent_CS_bytes_used_before->add(_collection_set_bytes_used_before); | |
| 1224 _recent_CS_bytes_surviving->add(surviving_bytes); | |
| 1225 | |
| 1226 // this is where we update the allocation rate of the application | |
| 1227 double app_time_ms = | |
| 1228 (_cur_collection_start_sec * 1000.0 - _prev_collection_pause_end_ms); | |
| 1229 if (app_time_ms < MIN_TIMER_GRANULARITY) { | |
| 1230 // This usually happens due to the timer not having the required | |
| 1231 // granularity. Some Linuxes are the usual culprits. | |
| 1232 // We'll just set it to something (arbitrarily) small. | |
| 1233 app_time_ms = 1.0; | |
| 1234 } | |
| 1235 size_t regions_allocated = | |
| 1236 (_region_num_young - _prev_region_num_young) + | |
| 1237 (_region_num_tenured - _prev_region_num_tenured); | |
| 1238 double alloc_rate_ms = (double) regions_allocated / app_time_ms; | |
| 1239 _alloc_rate_ms_seq->add(alloc_rate_ms); | |
| 1240 _prev_region_num_young = _region_num_young; | |
| 1241 _prev_region_num_tenured = _region_num_tenured; | |
| 1242 | |
| 1243 double interval_ms = | |
| 1244 (end_time_sec - _recent_prev_end_times_for_all_gcs_sec->oldest()) * 1000.0; | |
| 1245 update_recent_gc_times(end_time_sec, elapsed_ms); | |
| 1246 _recent_avg_pause_time_ratio = _recent_gc_times_ms->sum()/interval_ms; | |
|
1086
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1247 if (recent_avg_pause_time_ratio() < 0.0 || |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1248 (recent_avg_pause_time_ratio() - 1.0 > 0.0)) { |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1249 #ifndef PRODUCT |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1250 // Dump info to allow post-facto debugging |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1251 gclog_or_tty->print_cr("recent_avg_pause_time_ratio() out of bounds"); |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1252 gclog_or_tty->print_cr("-------------------------------------------"); |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1253 gclog_or_tty->print_cr("Recent GC Times (ms):"); |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1254 _recent_gc_times_ms->dump(); |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1255 gclog_or_tty->print_cr("(End Time=%3.3f) Recent GC End Times (s):", end_time_sec); |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1256 _recent_prev_end_times_for_all_gcs_sec->dump(); |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1257 gclog_or_tty->print_cr("GC = %3.3f, Interval = %3.3f, Ratio = %3.3f", |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1258 _recent_gc_times_ms->sum(), interval_ms, recent_avg_pause_time_ratio()); |
|
1087
23b9a8d315fc
6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents:
1086
diff
changeset
|
1259 // In debug mode, terminate the JVM if the user wants to debug at this point. |
|
23b9a8d315fc
6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents:
1086
diff
changeset
|
1260 assert(!G1FailOnFPError, "Debugging data for CR 6898948 has been dumped above"); |
|
23b9a8d315fc
6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents:
1086
diff
changeset
|
1261 #endif // !PRODUCT |
|
23b9a8d315fc
6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents:
1086
diff
changeset
|
1262 // Clip ratio between 0.0 and 1.0, and continue. This will be fixed in |
|
23b9a8d315fc
6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents:
1086
diff
changeset
|
1263 // CR 6902692 by redoing the manner in which the ratio is incrementally computed. |
|
1086
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1264 if (_recent_avg_pause_time_ratio < 0.0) { |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1265 _recent_avg_pause_time_ratio = 0.0; |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1266 } else { |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1267 assert(_recent_avg_pause_time_ratio - 1.0 > 0.0, "Ctl-point invariant"); |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1268 _recent_avg_pause_time_ratio = 1.0; |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1269 } |
|
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1270 } |
| 342 | 1271 } |
| 1272 | |
| 1273 if (G1PolicyVerbose > 1) { | |
| 1274 gclog_or_tty->print_cr(" Recording collection pause(%d)", _n_pauses); | |
| 1275 } | |
| 1276 | |
| 1277 PauseSummary* summary; | |
| 677 | 1278 if (abandoned) { |
| 1279 summary = _abandoned_summary; | |
| 1280 } else { | |
| 1281 summary = _summary; | |
| 342 | 1282 } |
| 1283 | |
| 1284 double ext_root_scan_time = avg_value(_par_last_ext_root_scan_times_ms); | |
| 1285 double mark_stack_scan_time = avg_value(_par_last_mark_stack_scan_times_ms); | |
| 1286 double update_rs_time = avg_value(_par_last_update_rs_times_ms); | |
| 1287 double update_rs_processed_buffers = | |
| 1288 sum_of_values(_par_last_update_rs_processed_buffers); | |
| 1289 double scan_rs_time = avg_value(_par_last_scan_rs_times_ms); | |
| 1290 double obj_copy_time = avg_value(_par_last_obj_copy_times_ms); | |
| 1291 double termination_time = avg_value(_par_last_termination_times_ms); | |
| 1292 | |
|
648
2314b7336582
6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents:
640
diff
changeset
|
1293 double parallel_other_time = _cur_collection_par_time_ms - |
|
2314b7336582
6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents:
640
diff
changeset
|
1294 (update_rs_time + ext_root_scan_time + mark_stack_scan_time + |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1295 scan_rs_time + obj_copy_time + termination_time); |
|
595
3698e8f47799
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
547
diff
changeset
|
1296 if (update_stats) { |
| 342 | 1297 MainBodySummary* body_summary = summary->main_body_summary(); |
| 1298 guarantee(body_summary != NULL, "should not be null!"); | |
| 1299 | |
| 1300 if (_satb_drain_time_set) | |
| 1301 body_summary->record_satb_drain_time_ms(_cur_satb_drain_time_ms); | |
| 1302 else | |
| 1303 body_summary->record_satb_drain_time_ms(0.0); | |
| 1304 body_summary->record_ext_root_scan_time_ms(ext_root_scan_time); | |
| 1305 body_summary->record_mark_stack_scan_time_ms(mark_stack_scan_time); | |
| 1306 body_summary->record_update_rs_time_ms(update_rs_time); | |
| 1307 body_summary->record_scan_rs_time_ms(scan_rs_time); | |
| 1308 body_summary->record_obj_copy_time_ms(obj_copy_time); | |
| 1309 if (parallel) { | |
| 1310 body_summary->record_parallel_time_ms(_cur_collection_par_time_ms); | |
| 1311 body_summary->record_clear_ct_time_ms(_cur_clear_ct_time_ms); | |
| 1312 body_summary->record_termination_time_ms(termination_time); | |
| 1313 body_summary->record_parallel_other_time_ms(parallel_other_time); | |
| 1314 } | |
| 1315 body_summary->record_mark_closure_time_ms(_mark_closure_time_ms); | |
| 1316 } | |
| 1317 | |
| 1318 if (G1PolicyVerbose > 1) { | |
| 1319 gclog_or_tty->print_cr(" ET: %10.6f ms (avg: %10.6f ms)\n" | |
| 1320 " CH Strong: %10.6f ms (avg: %10.6f ms)\n" | |
| 1321 " G1 Strong: %10.6f ms (avg: %10.6f ms)\n" | |
| 1322 " Evac: %10.6f ms (avg: %10.6f ms)\n" | |
| 1323 " ET-RS: %10.6f ms (avg: %10.6f ms)\n" | |
| 1324 " |RS|: " SIZE_FORMAT, | |
| 1325 elapsed_ms, recent_avg_time_for_pauses_ms(), | |
| 1326 _cur_CH_strong_roots_dur_ms, recent_avg_time_for_CH_strong_ms(), | |
| 1327 _cur_G1_strong_roots_dur_ms, recent_avg_time_for_G1_strong_ms(), | |
| 1328 evac_ms, recent_avg_time_for_evac_ms(), | |
| 1329 scan_rs_time, | |
| 1330 recent_avg_time_for_pauses_ms() - | |
| 1331 recent_avg_time_for_G1_strong_ms(), | |
| 1332 rs_size); | |
| 1333 | |
| 1334 gclog_or_tty->print_cr(" Used at start: " SIZE_FORMAT"K" | |
| 1335 " At end " SIZE_FORMAT "K\n" | |
| 1336 " garbage : " SIZE_FORMAT "K" | |
| 1337 " of " SIZE_FORMAT "K\n" | |
| 1338 " survival : %6.2f%% (%6.2f%% avg)", | |
| 1339 _cur_collection_pause_used_at_start_bytes/K, | |
| 1340 _g1->used()/K, freed_bytes/K, | |
| 1341 _collection_set_bytes_used_before/K, | |
| 1342 survival_fraction*100.0, | |
| 1343 recent_avg_survival_fraction()*100.0); | |
| 1344 gclog_or_tty->print_cr(" Recent %% gc pause time: %6.2f", | |
| 1345 recent_avg_pause_time_ratio() * 100.0); | |
| 1346 } | |
| 1347 | |
| 1348 double other_time_ms = elapsed_ms; | |
| 1349 | |
| 1350 if (!abandoned) { | |
| 1351 if (_satb_drain_time_set) | |
| 1352 other_time_ms -= _cur_satb_drain_time_ms; | |
| 1353 | |
| 1354 if (parallel) | |
| 1355 other_time_ms -= _cur_collection_par_time_ms + _cur_clear_ct_time_ms; | |
| 1356 else | |
| 1357 other_time_ms -= | |
| 1358 update_rs_time + | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1359 ext_root_scan_time + mark_stack_scan_time + |
| 342 | 1360 scan_rs_time + obj_copy_time; |
| 1361 } | |
| 1362 | |
| 1363 if (PrintGCDetails) { | |
| 1364 gclog_or_tty->print_cr("%s%s, %1.8lf secs]", | |
| 677 | 1365 abandoned ? " (abandoned)" : "", |
| 342 | 1366 (last_pause_included_initial_mark) ? " (initial-mark)" : "", |
| 1367 elapsed_ms / 1000.0); | |
| 1368 | |
| 1369 if (!abandoned) { | |
| 677 | 1370 if (_satb_drain_time_set) { |
| 342 | 1371 print_stats(1, "SATB Drain Time", _cur_satb_drain_time_ms); |
| 677 | 1372 } |
| 1373 if (_last_satb_drain_processed_buffers >= 0) { | |
| 342 | 1374 print_stats(2, "Processed Buffers", _last_satb_drain_processed_buffers); |
| 677 | 1375 } |
| 1376 if (parallel) { | |
| 1377 print_stats(1, "Parallel Time", _cur_collection_par_time_ms); | |
| 1378 print_par_stats(2, "Update RS (Start)", _par_last_update_rs_start_times_ms, false); | |
| 1379 print_par_stats(2, "Update RS", _par_last_update_rs_times_ms); | |
| 794 | 1380 print_par_buffers(3, "Processed Buffers", |
| 1381 _par_last_update_rs_processed_buffers, true); | |
| 342 | 1382 print_par_stats(2, "Ext Root Scanning", _par_last_ext_root_scan_times_ms); |
| 1383 print_par_stats(2, "Mark Stack Scanning", _par_last_mark_stack_scan_times_ms); | |
| 1384 print_par_stats(2, "Scan RS", _par_last_scan_rs_times_ms); | |
| 1385 print_par_stats(2, "Object Copy", _par_last_obj_copy_times_ms); | |
| 1386 print_par_stats(2, "Termination", _par_last_termination_times_ms); | |
| 1387 print_stats(2, "Other", parallel_other_time); | |
| 1388 print_stats(1, "Clear CT", _cur_clear_ct_time_ms); | |
| 677 | 1389 } else { |
| 1390 print_stats(1, "Update RS", update_rs_time); | |
| 794 | 1391 print_stats(2, "Processed Buffers", |
| 1392 (int)update_rs_processed_buffers); | |
| 342 | 1393 print_stats(1, "Ext Root Scanning", ext_root_scan_time); |
| 1394 print_stats(1, "Mark Stack Scanning", mark_stack_scan_time); | |
| 1395 print_stats(1, "Scan RS", scan_rs_time); | |
| 1396 print_stats(1, "Object Copying", obj_copy_time); | |
| 1397 } | |
| 1398 } | |
|
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1399 #ifndef PRODUCT |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1400 print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms); |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1401 print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms); |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1402 print_stats(1, "Min Clear CC", _min_clear_cc_time_ms); |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1403 print_stats(1, "Max Clear CC", _max_clear_cc_time_ms); |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1404 if (_num_cc_clears > 0) { |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1405 print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears)); |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1406 } |
|
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1407 #endif |
| 342 | 1408 print_stats(1, "Other", other_time_ms); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1409 print_stats(2, "Choose CSet", _recorded_young_cset_choice_time_ms); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1410 |
| 342 | 1411 for (int i = 0; i < _aux_num; ++i) { |
| 1412 if (_cur_aux_times_set[i]) { | |
| 1413 char buffer[96]; | |
| 1414 sprintf(buffer, "Aux%d", i); | |
| 1415 print_stats(1, buffer, _cur_aux_times_ms[i]); | |
| 1416 } | |
| 1417 } | |
| 1418 } | |
| 1419 if (PrintGCDetails) | |
| 1420 gclog_or_tty->print(" ["); | |
| 1421 if (PrintGC || PrintGCDetails) | |
| 1422 _g1->print_size_transition(gclog_or_tty, | |
| 1423 _cur_collection_pause_used_at_start_bytes, | |
| 1424 _g1->used(), _g1->capacity()); | |
| 1425 if (PrintGCDetails) | |
| 1426 gclog_or_tty->print_cr("]"); | |
| 1427 | |
| 1428 _all_pause_times_ms->add(elapsed_ms); | |
|
648
2314b7336582
6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents:
640
diff
changeset
|
1429 if (update_stats) { |
|
2314b7336582
6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents:
640
diff
changeset
|
1430 summary->record_total_time_ms(elapsed_ms); |
|
2314b7336582
6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents:
640
diff
changeset
|
1431 summary->record_other_time_ms(other_time_ms); |
|
2314b7336582
6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents:
640
diff
changeset
|
1432 } |
| 342 | 1433 for (int i = 0; i < _aux_num; ++i) |
| 1434 if (_cur_aux_times_set[i]) | |
| 1435 _all_aux_times_ms[i].add(_cur_aux_times_ms[i]); | |
| 1436 | |
| 1437 // Reset marks-between-pauses counter. | |
| 1438 _n_marks_since_last_pause = 0; | |
| 1439 | |
| 1440 // Update the efficiency-since-mark vars. | |
| 1441 double proc_ms = elapsed_ms * (double) _parallel_gc_threads; | |
| 1442 if (elapsed_ms < MIN_TIMER_GRANULARITY) { | |
| 1443 // This usually happens due to the timer not having the required | |
| 1444 // granularity. Some Linuxes are the usual culprits. | |
| 1445 // We'll just set it to something (arbitrarily) small. | |
| 1446 proc_ms = 1.0; | |
| 1447 } | |
| 1448 double cur_efficiency = (double) freed_bytes / proc_ms; | |
| 1449 | |
| 1450 bool new_in_marking_window = _in_marking_window; | |
| 1451 bool new_in_marking_window_im = false; | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1452 if (during_initial_mark_pause()) { |
| 342 | 1453 new_in_marking_window = true; |
| 1454 new_in_marking_window_im = true; | |
| 1455 } | |
| 1456 | |
| 1457 if (in_young_gc_mode()) { | |
| 1458 if (_last_full_young_gc) { | |
| 1459 set_full_young_gcs(false); | |
| 1460 _last_full_young_gc = false; | |
| 1461 } | |
| 1462 | |
| 1463 if ( !_last_young_gc_full ) { | |
| 1464 if ( _should_revert_to_full_young_gcs || | |
| 1465 _known_garbage_ratio < 0.05 || | |
| 1466 (adaptive_young_list_length() && | |
| 1467 (get_gc_eff_factor() * cur_efficiency < predict_young_gc_eff())) ) { | |
| 1468 set_full_young_gcs(true); | |
| 1469 } | |
| 1470 } | |
| 1471 _should_revert_to_full_young_gcs = false; | |
| 1472 | |
| 1473 if (_last_young_gc_full && !_during_marking) | |
| 1474 _young_gc_eff_seq->add(cur_efficiency); | |
| 1475 } | |
| 1476 | |
| 1477 _short_lived_surv_rate_group->start_adding_regions(); | |
| 1478 // do that for any other surv rate groupsx | |
| 1479 | |
| 1480 // <NEW PREDICTION> | |
| 1481 | |
| 677 | 1482 if (update_stats) { |
| 342 | 1483 double pause_time_ms = elapsed_ms; |
| 1484 | |
| 1485 size_t diff = 0; | |
| 1486 if (_max_pending_cards >= _pending_cards) | |
| 1487 diff = _max_pending_cards - _pending_cards; | |
| 1488 _pending_card_diff_seq->add((double) diff); | |
| 1489 | |
| 1490 double cost_per_card_ms = 0.0; | |
| 1491 if (_pending_cards > 0) { | |
| 1492 cost_per_card_ms = update_rs_time / (double) _pending_cards; | |
| 1493 _cost_per_card_ms_seq->add(cost_per_card_ms); | |
| 1494 } | |
| 1495 | |
| 1496 size_t cards_scanned = _g1->cards_scanned(); | |
| 1497 | |
| 1498 double cost_per_entry_ms = 0.0; | |
| 1499 if (cards_scanned > 10) { | |
| 1500 cost_per_entry_ms = scan_rs_time / (double) cards_scanned; | |
| 1501 if (_last_young_gc_full) | |
| 1502 _cost_per_entry_ms_seq->add(cost_per_entry_ms); | |
| 1503 else | |
| 1504 _partially_young_cost_per_entry_ms_seq->add(cost_per_entry_ms); | |
| 1505 } | |
| 1506 | |
| 1507 if (_max_rs_lengths > 0) { | |
| 1508 double cards_per_entry_ratio = | |
| 1509 (double) cards_scanned / (double) _max_rs_lengths; | |
| 1510 if (_last_young_gc_full) | |
| 1511 _fully_young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio); | |
| 1512 else | |
| 1513 _partially_young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio); | |
| 1514 } | |
| 1515 | |
| 1516 size_t rs_length_diff = _max_rs_lengths - _recorded_rs_lengths; | |
| 1517 if (rs_length_diff >= 0) | |
| 1518 _rs_length_diff_seq->add((double) rs_length_diff); | |
| 1519 | |
| 1520 size_t copied_bytes = surviving_bytes; | |
| 1521 double cost_per_byte_ms = 0.0; | |
| 1522 if (copied_bytes > 0) { | |
| 1523 cost_per_byte_ms = obj_copy_time / (double) copied_bytes; | |
| 1524 if (_in_marking_window) | |
| 1525 _cost_per_byte_ms_during_cm_seq->add(cost_per_byte_ms); | |
| 1526 else | |
| 1527 _cost_per_byte_ms_seq->add(cost_per_byte_ms); | |
| 1528 } | |
| 1529 | |
| 1530 double all_other_time_ms = pause_time_ms - | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1531 (update_rs_time + scan_rs_time + obj_copy_time + |
| 342 | 1532 _mark_closure_time_ms + termination_time); |
| 1533 | |
| 1534 double young_other_time_ms = 0.0; | |
| 1535 if (_recorded_young_regions > 0) { | |
| 1536 young_other_time_ms = | |
| 1537 _recorded_young_cset_choice_time_ms + | |
| 1538 _recorded_young_free_cset_time_ms; | |
| 1539 _young_other_cost_per_region_ms_seq->add(young_other_time_ms / | |
| 1540 (double) _recorded_young_regions); | |
| 1541 } | |
| 1542 double non_young_other_time_ms = 0.0; | |
| 1543 if (_recorded_non_young_regions > 0) { | |
| 1544 non_young_other_time_ms = | |
| 1545 _recorded_non_young_cset_choice_time_ms + | |
| 1546 _recorded_non_young_free_cset_time_ms; | |
| 1547 | |
| 1548 _non_young_other_cost_per_region_ms_seq->add(non_young_other_time_ms / | |
| 1549 (double) _recorded_non_young_regions); | |
| 1550 } | |
| 1551 | |
| 1552 double constant_other_time_ms = all_other_time_ms - | |
| 1553 (young_other_time_ms + non_young_other_time_ms); | |
| 1554 _constant_other_time_ms_seq->add(constant_other_time_ms); | |
| 1555 | |
| 1556 double survival_ratio = 0.0; | |
| 1557 if (_bytes_in_collection_set_before_gc > 0) { | |
| 1558 survival_ratio = (double) bytes_in_to_space_during_gc() / | |
| 1559 (double) _bytes_in_collection_set_before_gc; | |
| 1560 } | |
| 1561 | |
| 1562 _pending_cards_seq->add((double) _pending_cards); | |
| 1563 _scanned_cards_seq->add((double) cards_scanned); | |
| 1564 _rs_lengths_seq->add((double) _max_rs_lengths); | |
| 1565 | |
| 1566 double expensive_region_limit_ms = | |
| 751 | 1567 (double) MaxGCPauseMillis - predict_constant_other_time_ms(); |
| 342 | 1568 if (expensive_region_limit_ms < 0.0) { |
| 1569 // this means that the other time was predicted to be longer than | |
| 1570 // than the max pause time | |
| 751 | 1571 expensive_region_limit_ms = (double) MaxGCPauseMillis; |
| 342 | 1572 } |
| 1573 _expensive_region_limit_ms = expensive_region_limit_ms; | |
| 1574 | |
| 1575 if (PREDICTIONS_VERBOSE) { | |
| 1576 gclog_or_tty->print_cr(""); | |
| 1577 gclog_or_tty->print_cr("PREDICTIONS %1.4lf %d " | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1578 "REGIONS %d %d %d " |
| 342 | 1579 "PENDING_CARDS %d %d " |
| 1580 "CARDS_SCANNED %d %d " | |
| 1581 "RS_LENGTHS %d %d " | |
| 1582 "RS_UPDATE %1.6lf %1.6lf RS_SCAN %1.6lf %1.6lf " | |
| 1583 "SURVIVAL_RATIO %1.6lf %1.6lf " | |
| 1584 "OBJECT_COPY %1.6lf %1.6lf OTHER_CONSTANT %1.6lf %1.6lf " | |
| 1585 "OTHER_YOUNG %1.6lf %1.6lf " | |
| 1586 "OTHER_NON_YOUNG %1.6lf %1.6lf " | |
| 1587 "VTIME_DIFF %1.6lf TERMINATION %1.6lf " | |
| 1588 "ELAPSED %1.6lf %1.6lf ", | |
| 1589 _cur_collection_start_sec, | |
| 1590 (!_last_young_gc_full) ? 2 : | |
| 1591 (last_pause_included_initial_mark) ? 1 : 0, | |
| 1592 _recorded_region_num, | |
| 1593 _recorded_young_regions, | |
| 1594 _recorded_non_young_regions, | |
| 1595 _predicted_pending_cards, _pending_cards, | |
| 1596 _predicted_cards_scanned, cards_scanned, | |
| 1597 _predicted_rs_lengths, _max_rs_lengths, | |
| 1598 _predicted_rs_update_time_ms, update_rs_time, | |
| 1599 _predicted_rs_scan_time_ms, scan_rs_time, | |
| 1600 _predicted_survival_ratio, survival_ratio, | |
| 1601 _predicted_object_copy_time_ms, obj_copy_time, | |
| 1602 _predicted_constant_other_time_ms, constant_other_time_ms, | |
| 1603 _predicted_young_other_time_ms, young_other_time_ms, | |
| 1604 _predicted_non_young_other_time_ms, | |
| 1605 non_young_other_time_ms, | |
| 1606 _vtime_diff_ms, termination_time, | |
| 1607 _predicted_pause_time_ms, elapsed_ms); | |
| 1608 } | |
| 1609 | |
| 1610 if (G1PolicyVerbose > 0) { | |
| 1611 gclog_or_tty->print_cr("Pause Time, predicted: %1.4lfms (predicted %s), actual: %1.4lfms", | |
| 1612 _predicted_pause_time_ms, | |
| 1613 (_within_target) ? "within" : "outside", | |
| 1614 elapsed_ms); | |
| 1615 } | |
| 1616 | |
| 1617 } | |
| 1618 | |
| 1619 _in_marking_window = new_in_marking_window; | |
| 1620 _in_marking_window_im = new_in_marking_window_im; | |
| 1621 _free_regions_at_end_of_collection = _g1->free_regions(); | |
| 1622 calculate_young_list_min_length(); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1623 calculate_young_list_target_length(); |
| 342 | 1624 |
| 1111 | 1625 // Note that _mmu_tracker->max_gc_time() returns the time in seconds. |
| 1282 | 1626 double update_rs_time_goal_ms = _mmu_tracker->max_gc_time() * MILLIUNITS * G1RSetUpdatingPauseTimePercent / 100.0; |
| 1111 | 1627 adjust_concurrent_refinement(update_rs_time, update_rs_processed_buffers, update_rs_time_goal_ms); |
| 342 | 1628 // </NEW PREDICTION> |
| 1629 | |
| 1630 _target_pause_time_ms = -1.0; | |
| 1631 } | |
| 1632 | |
| 1633 // <NEW PREDICTION> | |
| 1634 | |
| 1111 | 1635 void G1CollectorPolicy::adjust_concurrent_refinement(double update_rs_time, |
| 1636 double update_rs_processed_buffers, | |
| 1637 double goal_ms) { | |
| 1638 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 1639 ConcurrentG1Refine *cg1r = G1CollectedHeap::heap()->concurrent_g1_refine(); | |
| 1640 | |
| 1282 | 1641 if (G1UseAdaptiveConcRefinement) { |
| 1111 | 1642 const int k_gy = 3, k_gr = 6; |
| 1643 const double inc_k = 1.1, dec_k = 0.9; | |
| 1644 | |
| 1645 int g = cg1r->green_zone(); | |
| 1646 if (update_rs_time > goal_ms) { | |
| 1647 g = (int)(g * dec_k); // Can become 0, that's OK. That would mean a mutator-only processing. | |
| 1648 } else { | |
| 1649 if (update_rs_time < goal_ms && update_rs_processed_buffers > g) { | |
| 1650 g = (int)MAX2(g * inc_k, g + 1.0); | |
| 1651 } | |
| 1652 } | |
| 1653 // Change the refinement threads params | |
| 1654 cg1r->set_green_zone(g); | |
| 1655 cg1r->set_yellow_zone(g * k_gy); | |
| 1656 cg1r->set_red_zone(g * k_gr); | |
| 1657 cg1r->reinitialize_threads(); | |
| 1658 | |
| 1659 int processing_threshold_delta = MAX2((int)(cg1r->green_zone() * sigma()), 1); | |
| 1660 int processing_threshold = MIN2(cg1r->green_zone() + processing_threshold_delta, | |
| 1661 cg1r->yellow_zone()); | |
| 1662 // Change the barrier params | |
| 1663 dcqs.set_process_completed_threshold(processing_threshold); | |
| 1664 dcqs.set_max_completed_queue(cg1r->red_zone()); | |
| 1665 } | |
| 1666 | |
| 1667 int curr_queue_size = dcqs.completed_buffers_num(); | |
| 1668 if (curr_queue_size >= cg1r->yellow_zone()) { | |
| 1669 dcqs.set_completed_queue_padding(curr_queue_size); | |
| 1670 } else { | |
| 1671 dcqs.set_completed_queue_padding(0); | |
| 1672 } | |
| 1673 dcqs.notify_if_necessary(); | |
| 1674 } | |
| 1675 | |
| 342 | 1676 double |
| 1677 G1CollectorPolicy:: | |
| 1678 predict_young_collection_elapsed_time_ms(size_t adjustment) { | |
| 1679 guarantee( adjustment == 0 || adjustment == 1, "invariant" ); | |
| 1680 | |
| 1681 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1682 size_t young_num = g1h->young_list()->length(); |
| 342 | 1683 if (young_num == 0) |
| 1684 return 0.0; | |
| 1685 | |
| 1686 young_num += adjustment; | |
| 1687 size_t pending_cards = predict_pending_cards(); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1688 size_t rs_lengths = g1h->young_list()->sampled_rs_lengths() + |
| 342 | 1689 predict_rs_length_diff(); |
| 1690 size_t card_num; | |
| 1691 if (full_young_gcs()) | |
| 1692 card_num = predict_young_card_num(rs_lengths); | |
| 1693 else | |
| 1694 card_num = predict_non_young_card_num(rs_lengths); | |
| 1695 size_t young_byte_size = young_num * HeapRegion::GrainBytes; | |
| 1696 double accum_yg_surv_rate = | |
| 1697 _short_lived_surv_rate_group->accum_surv_rate(adjustment); | |
| 1698 | |
| 1699 size_t bytes_to_copy = | |
| 1700 (size_t) (accum_yg_surv_rate * (double) HeapRegion::GrainBytes); | |
| 1701 | |
| 1702 return | |
| 1703 predict_rs_update_time_ms(pending_cards) + | |
| 1704 predict_rs_scan_time_ms(card_num) + | |
| 1705 predict_object_copy_time_ms(bytes_to_copy) + | |
| 1706 predict_young_other_time_ms(young_num) + | |
| 1707 predict_constant_other_time_ms(); | |
| 1708 } | |
| 1709 | |
| 1710 double | |
| 1711 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards) { | |
| 1712 size_t rs_length = predict_rs_length_diff(); | |
| 1713 size_t card_num; | |
| 1714 if (full_young_gcs()) | |
| 1715 card_num = predict_young_card_num(rs_length); | |
| 1716 else | |
| 1717 card_num = predict_non_young_card_num(rs_length); | |
| 1718 return predict_base_elapsed_time_ms(pending_cards, card_num); | |
| 1719 } | |
| 1720 | |
| 1721 double | |
| 1722 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards, | |
| 1723 size_t scanned_cards) { | |
| 1724 return | |
| 1725 predict_rs_update_time_ms(pending_cards) + | |
| 1726 predict_rs_scan_time_ms(scanned_cards) + | |
| 1727 predict_constant_other_time_ms(); | |
| 1728 } | |
| 1729 | |
| 1730 double | |
| 1731 G1CollectorPolicy::predict_region_elapsed_time_ms(HeapRegion* hr, | |
| 1732 bool young) { | |
| 1733 size_t rs_length = hr->rem_set()->occupied(); | |
| 1734 size_t card_num; | |
| 1735 if (full_young_gcs()) | |
| 1736 card_num = predict_young_card_num(rs_length); | |
| 1737 else | |
| 1738 card_num = predict_non_young_card_num(rs_length); | |
| 1739 size_t bytes_to_copy = predict_bytes_to_copy(hr); | |
| 1740 | |
| 1741 double region_elapsed_time_ms = | |
| 1742 predict_rs_scan_time_ms(card_num) + | |
| 1743 predict_object_copy_time_ms(bytes_to_copy); | |
| 1744 | |
| 1745 if (young) | |
| 1746 region_elapsed_time_ms += predict_young_other_time_ms(1); | |
| 1747 else | |
| 1748 region_elapsed_time_ms += predict_non_young_other_time_ms(1); | |
| 1749 | |
| 1750 return region_elapsed_time_ms; | |
| 1751 } | |
| 1752 | |
| 1753 size_t | |
| 1754 G1CollectorPolicy::predict_bytes_to_copy(HeapRegion* hr) { | |
| 1755 size_t bytes_to_copy; | |
| 1756 if (hr->is_marked()) | |
| 1757 bytes_to_copy = hr->max_live_bytes(); | |
| 1758 else { | |
| 1759 guarantee( hr->is_young() && hr->age_in_surv_rate_group() != -1, | |
| 1760 "invariant" ); | |
| 1761 int age = hr->age_in_surv_rate_group(); | |
| 545 | 1762 double yg_surv_rate = predict_yg_surv_rate(age, hr->surv_rate_group()); |
| 342 | 1763 bytes_to_copy = (size_t) ((double) hr->used() * yg_surv_rate); |
| 1764 } | |
| 1765 | |
| 1766 return bytes_to_copy; | |
| 1767 } | |
| 1768 | |
| 1769 void | |
| 1770 G1CollectorPolicy::start_recording_regions() { | |
| 1771 _recorded_rs_lengths = 0; | |
| 1772 _recorded_young_regions = 0; | |
| 1773 _recorded_non_young_regions = 0; | |
| 1774 | |
| 1775 #if PREDICTIONS_VERBOSE | |
| 1776 _recorded_marked_bytes = 0; | |
| 1777 _recorded_young_bytes = 0; | |
| 1778 _predicted_bytes_to_copy = 0; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1779 _predicted_rs_lengths = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1780 _predicted_cards_scanned = 0; |
| 342 | 1781 #endif // PREDICTIONS_VERBOSE |
| 1782 } | |
| 1783 | |
| 1784 void | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1785 G1CollectorPolicy::record_cset_region_info(HeapRegion* hr, bool young) { |
| 342 | 1786 #if PREDICTIONS_VERBOSE |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1787 if (!young) { |
| 342 | 1788 _recorded_marked_bytes += hr->max_live_bytes(); |
| 1789 } | |
| 1790 _predicted_bytes_to_copy += predict_bytes_to_copy(hr); | |
| 1791 #endif // PREDICTIONS_VERBOSE | |
| 1792 | |
| 1793 size_t rs_length = hr->rem_set()->occupied(); | |
| 1794 _recorded_rs_lengths += rs_length; | |
| 1795 } | |
| 1796 | |
| 1797 void | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1798 G1CollectorPolicy::record_non_young_cset_region(HeapRegion* hr) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1799 assert(!hr->is_young(), "should not call this"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1800 ++_recorded_non_young_regions; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1801 record_cset_region_info(hr, false); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1802 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1803 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1804 void |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1805 G1CollectorPolicy::set_recorded_young_regions(size_t n_regions) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1806 _recorded_young_regions = n_regions; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1807 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1808 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1809 void G1CollectorPolicy::set_recorded_young_bytes(size_t bytes) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1810 #if PREDICTIONS_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1811 _recorded_young_bytes = bytes; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1812 #endif // PREDICTIONS_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1813 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1814 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1815 void G1CollectorPolicy::set_recorded_rs_lengths(size_t rs_lengths) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1816 _recorded_rs_lengths = rs_lengths; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1817 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1818 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1819 void G1CollectorPolicy::set_predicted_bytes_to_copy(size_t bytes) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1820 _predicted_bytes_to_copy = bytes; |
| 342 | 1821 } |
| 1822 | |
| 1823 void | |
| 1824 G1CollectorPolicy::end_recording_regions() { | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1825 // The _predicted_pause_time_ms field is referenced in code |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1826 // not under PREDICTIONS_VERBOSE. Let's initialize it. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1827 _predicted_pause_time_ms = -1.0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1828 |
| 342 | 1829 #if PREDICTIONS_VERBOSE |
| 1830 _predicted_pending_cards = predict_pending_cards(); | |
| 1831 _predicted_rs_lengths = _recorded_rs_lengths + predict_rs_length_diff(); | |
| 1832 if (full_young_gcs()) | |
| 1833 _predicted_cards_scanned += predict_young_card_num(_predicted_rs_lengths); | |
| 1834 else | |
| 1835 _predicted_cards_scanned += | |
| 1836 predict_non_young_card_num(_predicted_rs_lengths); | |
| 1837 _recorded_region_num = _recorded_young_regions + _recorded_non_young_regions; | |
| 1838 | |
| 1839 _predicted_rs_update_time_ms = | |
| 1840 predict_rs_update_time_ms(_g1->pending_card_num()); | |
| 1841 _predicted_rs_scan_time_ms = | |
| 1842 predict_rs_scan_time_ms(_predicted_cards_scanned); | |
| 1843 _predicted_object_copy_time_ms = | |
| 1844 predict_object_copy_time_ms(_predicted_bytes_to_copy); | |
| 1845 _predicted_constant_other_time_ms = | |
| 1846 predict_constant_other_time_ms(); | |
| 1847 _predicted_young_other_time_ms = | |
| 1848 predict_young_other_time_ms(_recorded_young_regions); | |
| 1849 _predicted_non_young_other_time_ms = | |
| 1850 predict_non_young_other_time_ms(_recorded_non_young_regions); | |
| 1851 | |
| 1852 _predicted_pause_time_ms = | |
| 1853 _predicted_rs_update_time_ms + | |
| 1854 _predicted_rs_scan_time_ms + | |
| 1855 _predicted_object_copy_time_ms + | |
| 1856 _predicted_constant_other_time_ms + | |
| 1857 _predicted_young_other_time_ms + | |
| 1858 _predicted_non_young_other_time_ms; | |
| 1859 #endif // PREDICTIONS_VERBOSE | |
| 1860 } | |
| 1861 | |
| 1862 void G1CollectorPolicy::check_if_region_is_too_expensive(double | |
| 1863 predicted_time_ms) { | |
| 1864 // I don't think we need to do this when in young GC mode since | |
| 1865 // marking will be initiated next time we hit the soft limit anyway... | |
| 1866 if (predicted_time_ms > _expensive_region_limit_ms) { | |
| 1867 if (!in_young_gc_mode()) { | |
| 1868 set_full_young_gcs(true); | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1869 // We might want to do something different here. However, |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1870 // right now we don't support the non-generational G1 mode |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1871 // (and in fact we are planning to remove the associated code, |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1872 // see CR 6814390). So, let's leave it as is and this will be |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1873 // removed some time in the future |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1874 ShouldNotReachHere(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1875 set_during_initial_mark_pause(); |
| 342 | 1876 } else |
| 1877 // no point in doing another partial one | |
| 1878 _should_revert_to_full_young_gcs = true; | |
| 1879 } | |
| 1880 } | |
| 1881 | |
| 1882 // </NEW PREDICTION> | |
| 1883 | |
| 1884 | |
| 1885 void G1CollectorPolicy::update_recent_gc_times(double end_time_sec, | |
| 1886 double elapsed_ms) { | |
| 1887 _recent_gc_times_ms->add(elapsed_ms); | |
| 1888 _recent_prev_end_times_for_all_gcs_sec->add(end_time_sec); | |
| 1889 _prev_collection_pause_end_ms = end_time_sec * 1000.0; | |
| 1890 } | |
| 1891 | |
| 1892 double G1CollectorPolicy::recent_avg_time_for_pauses_ms() { | |
| 751 | 1893 if (_recent_pause_times_ms->num() == 0) return (double) MaxGCPauseMillis; |
| 342 | 1894 else return _recent_pause_times_ms->avg(); |
| 1895 } | |
| 1896 | |
| 1897 double G1CollectorPolicy::recent_avg_time_for_CH_strong_ms() { | |
| 1898 if (_recent_CH_strong_roots_times_ms->num() == 0) | |
| 751 | 1899 return (double)MaxGCPauseMillis/3.0; |
| 342 | 1900 else return _recent_CH_strong_roots_times_ms->avg(); |
| 1901 } | |
| 1902 | |
| 1903 double G1CollectorPolicy::recent_avg_time_for_G1_strong_ms() { | |
| 1904 if (_recent_G1_strong_roots_times_ms->num() == 0) | |
| 751 | 1905 return (double)MaxGCPauseMillis/3.0; |
| 342 | 1906 else return _recent_G1_strong_roots_times_ms->avg(); |
| 1907 } | |
| 1908 | |
| 1909 double G1CollectorPolicy::recent_avg_time_for_evac_ms() { | |
| 751 | 1910 if (_recent_evac_times_ms->num() == 0) return (double)MaxGCPauseMillis/3.0; |
| 342 | 1911 else return _recent_evac_times_ms->avg(); |
| 1912 } | |
| 1913 | |
| 1914 int G1CollectorPolicy::number_of_recent_gcs() { | |
| 1915 assert(_recent_CH_strong_roots_times_ms->num() == | |
| 1916 _recent_G1_strong_roots_times_ms->num(), "Sequence out of sync"); | |
| 1917 assert(_recent_G1_strong_roots_times_ms->num() == | |
| 1918 _recent_evac_times_ms->num(), "Sequence out of sync"); | |
| 1919 assert(_recent_evac_times_ms->num() == | |
| 1920 _recent_pause_times_ms->num(), "Sequence out of sync"); | |
| 1921 assert(_recent_pause_times_ms->num() == | |
| 1922 _recent_CS_bytes_used_before->num(), "Sequence out of sync"); | |
| 1923 assert(_recent_CS_bytes_used_before->num() == | |
| 1924 _recent_CS_bytes_surviving->num(), "Sequence out of sync"); | |
| 1925 return _recent_pause_times_ms->num(); | |
| 1926 } | |
| 1927 | |
| 1928 double G1CollectorPolicy::recent_avg_survival_fraction() { | |
| 1929 return recent_avg_survival_fraction_work(_recent_CS_bytes_surviving, | |
| 1930 _recent_CS_bytes_used_before); | |
| 1931 } | |
| 1932 | |
| 1933 double G1CollectorPolicy::last_survival_fraction() { | |
| 1934 return last_survival_fraction_work(_recent_CS_bytes_surviving, | |
| 1935 _recent_CS_bytes_used_before); | |
| 1936 } | |
| 1937 | |
| 1938 double | |
| 1939 G1CollectorPolicy::recent_avg_survival_fraction_work(TruncatedSeq* surviving, | |
| 1940 TruncatedSeq* before) { | |
| 1941 assert(surviving->num() == before->num(), "Sequence out of sync"); | |
| 1942 if (before->sum() > 0.0) { | |
| 1943 double recent_survival_rate = surviving->sum() / before->sum(); | |
| 1944 // We exempt parallel collection from this check because Alloc Buffer | |
| 1945 // fragmentation can produce negative collections. | |
| 1946 // Further, we're now always doing parallel collection. But I'm still | |
| 1947 // leaving this here as a placeholder for a more precise assertion later. | |
| 1948 // (DLD, 10/05.) | |
| 1949 assert((true || ParallelGCThreads > 0) || | |
| 1950 _g1->evacuation_failed() || | |
| 1951 recent_survival_rate <= 1.0, "Or bad frac"); | |
| 1952 return recent_survival_rate; | |
| 1953 } else { | |
| 1954 return 1.0; // Be conservative. | |
| 1955 } | |
| 1956 } | |
| 1957 | |
| 1958 double | |
| 1959 G1CollectorPolicy::last_survival_fraction_work(TruncatedSeq* surviving, | |
| 1960 TruncatedSeq* before) { | |
| 1961 assert(surviving->num() == before->num(), "Sequence out of sync"); | |
| 1962 if (surviving->num() > 0 && before->last() > 0.0) { | |
| 1963 double last_survival_rate = surviving->last() / before->last(); | |
| 1964 // We exempt parallel collection from this check because Alloc Buffer | |
| 1965 // fragmentation can produce negative collections. | |
| 1966 // Further, we're now always doing parallel collection. But I'm still | |
| 1967 // leaving this here as a placeholder for a more precise assertion later. | |
| 1968 // (DLD, 10/05.) | |
| 1969 assert((true || ParallelGCThreads > 0) || | |
| 1970 last_survival_rate <= 1.0, "Or bad frac"); | |
| 1971 return last_survival_rate; | |
| 1972 } else { | |
| 1973 return 1.0; | |
| 1974 } | |
| 1975 } | |
| 1976 | |
| 1977 static const int survival_min_obs = 5; | |
| 1978 static double survival_min_obs_limits[] = { 0.9, 0.7, 0.5, 0.3, 0.1 }; | |
| 1979 static const double min_survival_rate = 0.1; | |
| 1980 | |
| 1981 double | |
| 1982 G1CollectorPolicy::conservative_avg_survival_fraction_work(double avg, | |
| 1983 double latest) { | |
| 1984 double res = avg; | |
| 1985 if (number_of_recent_gcs() < survival_min_obs) { | |
| 1986 res = MAX2(res, survival_min_obs_limits[number_of_recent_gcs()]); | |
| 1987 } | |
| 1988 res = MAX2(res, latest); | |
| 1989 res = MAX2(res, min_survival_rate); | |
| 1990 // In the parallel case, LAB fragmentation can produce "negative | |
| 1991 // collections"; so can evac failure. Cap at 1.0 | |
| 1992 res = MIN2(res, 1.0); | |
| 1993 return res; | |
| 1994 } | |
| 1995 | |
| 1996 size_t G1CollectorPolicy::expansion_amount() { | |
| 1356 | 1997 if ((recent_avg_pause_time_ratio() * 100.0) > _gc_overhead_perc) { |
| 751 | 1998 // We will double the existing space, or take |
| 1999 // G1ExpandByPercentOfAvailable % of the available expansion | |
| 2000 // space, whichever is smaller, bounded below by a minimum | |
| 2001 // expansion (unless that's all that's left.) | |
| 342 | 2002 const size_t min_expand_bytes = 1*M; |
| 2003 size_t reserved_bytes = _g1->g1_reserved_obj_bytes(); | |
| 2004 size_t committed_bytes = _g1->capacity(); | |
| 2005 size_t uncommitted_bytes = reserved_bytes - committed_bytes; | |
| 2006 size_t expand_bytes; | |
| 2007 size_t expand_bytes_via_pct = | |
| 751 | 2008 uncommitted_bytes * G1ExpandByPercentOfAvailable / 100; |
| 342 | 2009 expand_bytes = MIN2(expand_bytes_via_pct, committed_bytes); |
| 2010 expand_bytes = MAX2(expand_bytes, min_expand_bytes); | |
| 2011 expand_bytes = MIN2(expand_bytes, uncommitted_bytes); | |
| 2012 if (G1PolicyVerbose > 1) { | |
| 2013 gclog_or_tty->print("Decided to expand: ratio = %5.2f, " | |
| 2014 "committed = %d%s, uncommited = %d%s, via pct = %d%s.\n" | |
| 2015 " Answer = %d.\n", | |
| 2016 recent_avg_pause_time_ratio(), | |
| 2017 byte_size_in_proper_unit(committed_bytes), | |
| 2018 proper_unit_for_byte_size(committed_bytes), | |
| 2019 byte_size_in_proper_unit(uncommitted_bytes), | |
| 2020 proper_unit_for_byte_size(uncommitted_bytes), | |
| 2021 byte_size_in_proper_unit(expand_bytes_via_pct), | |
| 2022 proper_unit_for_byte_size(expand_bytes_via_pct), | |
| 2023 byte_size_in_proper_unit(expand_bytes), | |
| 2024 proper_unit_for_byte_size(expand_bytes)); | |
| 2025 } | |
| 2026 return expand_bytes; | |
| 2027 } else { | |
| 2028 return 0; | |
| 2029 } | |
| 2030 } | |
| 2031 | |
| 2032 void G1CollectorPolicy::note_start_of_mark_thread() { | |
| 2033 _mark_thread_startup_sec = os::elapsedTime(); | |
| 2034 } | |
| 2035 | |
| 2036 class CountCSClosure: public HeapRegionClosure { | |
| 2037 G1CollectorPolicy* _g1_policy; | |
| 2038 public: | |
| 2039 CountCSClosure(G1CollectorPolicy* g1_policy) : | |
| 2040 _g1_policy(g1_policy) {} | |
| 2041 bool doHeapRegion(HeapRegion* r) { | |
| 2042 _g1_policy->_bytes_in_collection_set_before_gc += r->used(); | |
| 2043 return false; | |
| 2044 } | |
| 2045 }; | |
| 2046 | |
| 2047 void G1CollectorPolicy::count_CS_bytes_used() { | |
| 2048 CountCSClosure cs_closure(this); | |
| 2049 _g1->collection_set_iterate(&cs_closure); | |
| 2050 } | |
| 2051 | |
| 2052 static void print_indent(int level) { | |
| 2053 for (int j = 0; j < level+1; ++j) | |
| 2054 gclog_or_tty->print(" "); | |
| 2055 } | |
| 2056 | |
| 2057 void G1CollectorPolicy::print_summary (int level, | |
| 2058 const char* str, | |
| 2059 NumberSeq* seq) const { | |
| 2060 double sum = seq->sum(); | |
| 2061 print_indent(level); | |
| 2062 gclog_or_tty->print_cr("%-24s = %8.2lf s (avg = %8.2lf ms)", | |
| 2063 str, sum / 1000.0, seq->avg()); | |
| 2064 } | |
| 2065 | |
| 2066 void G1CollectorPolicy::print_summary_sd (int level, | |
| 2067 const char* str, | |
| 2068 NumberSeq* seq) const { | |
| 2069 print_summary(level, str, seq); | |
| 2070 print_indent(level + 5); | |
| 2071 gclog_or_tty->print_cr("(num = %5d, std dev = %8.2lf ms, max = %8.2lf ms)", | |
| 2072 seq->num(), seq->sd(), seq->maximum()); | |
| 2073 } | |
| 2074 | |
| 2075 void G1CollectorPolicy::check_other_times(int level, | |
| 2076 NumberSeq* other_times_ms, | |
| 2077 NumberSeq* calc_other_times_ms) const { | |
| 2078 bool should_print = false; | |
| 2079 | |
| 2080 double max_sum = MAX2(fabs(other_times_ms->sum()), | |
| 2081 fabs(calc_other_times_ms->sum())); | |
| 2082 double min_sum = MIN2(fabs(other_times_ms->sum()), | |
| 2083 fabs(calc_other_times_ms->sum())); | |
| 2084 double sum_ratio = max_sum / min_sum; | |
| 2085 if (sum_ratio > 1.1) { | |
| 2086 should_print = true; | |
| 2087 print_indent(level + 1); | |
| 2088 gclog_or_tty->print_cr("## CALCULATED OTHER SUM DOESN'T MATCH RECORDED ###"); | |
| 2089 } | |
| 2090 | |
| 2091 double max_avg = MAX2(fabs(other_times_ms->avg()), | |
| 2092 fabs(calc_other_times_ms->avg())); | |
| 2093 double min_avg = MIN2(fabs(other_times_ms->avg()), | |
| 2094 fabs(calc_other_times_ms->avg())); | |
| 2095 double avg_ratio = max_avg / min_avg; | |
| 2096 if (avg_ratio > 1.1) { | |
| 2097 should_print = true; | |
| 2098 print_indent(level + 1); | |
| 2099 gclog_or_tty->print_cr("## CALCULATED OTHER AVG DOESN'T MATCH RECORDED ###"); | |
| 2100 } | |
| 2101 | |
| 2102 if (other_times_ms->sum() < -0.01) { | |
| 2103 print_indent(level + 1); | |
| 2104 gclog_or_tty->print_cr("## RECORDED OTHER SUM IS NEGATIVE ###"); | |
| 2105 } | |
| 2106 | |
| 2107 if (other_times_ms->avg() < -0.01) { | |
| 2108 print_indent(level + 1); | |
| 2109 gclog_or_tty->print_cr("## RECORDED OTHER AVG IS NEGATIVE ###"); | |
| 2110 } | |
| 2111 | |
| 2112 if (calc_other_times_ms->sum() < -0.01) { | |
| 2113 should_print = true; | |
| 2114 print_indent(level + 1); | |
| 2115 gclog_or_tty->print_cr("## CALCULATED OTHER SUM IS NEGATIVE ###"); | |
| 2116 } | |
| 2117 | |
| 2118 if (calc_other_times_ms->avg() < -0.01) { | |
| 2119 should_print = true; | |
| 2120 print_indent(level + 1); | |
| 2121 gclog_or_tty->print_cr("## CALCULATED OTHER AVG IS NEGATIVE ###"); | |
| 2122 } | |
| 2123 | |
| 2124 if (should_print) | |
| 2125 print_summary(level, "Other(Calc)", calc_other_times_ms); | |
| 2126 } | |
| 2127 | |
| 2128 void G1CollectorPolicy::print_summary(PauseSummary* summary) const { | |
| 2129 bool parallel = ParallelGCThreads > 0; | |
| 2130 MainBodySummary* body_summary = summary->main_body_summary(); | |
| 2131 if (summary->get_total_seq()->num() > 0) { | |
| 677 | 2132 print_summary_sd(0, "Evacuation Pauses", summary->get_total_seq()); |
| 342 | 2133 if (body_summary != NULL) { |
| 2134 print_summary(1, "SATB Drain", body_summary->get_satb_drain_seq()); | |
| 2135 if (parallel) { | |
| 2136 print_summary(1, "Parallel Time", body_summary->get_parallel_seq()); | |
| 2137 print_summary(2, "Update RS", body_summary->get_update_rs_seq()); | |
| 2138 print_summary(2, "Ext Root Scanning", | |
| 2139 body_summary->get_ext_root_scan_seq()); | |
| 2140 print_summary(2, "Mark Stack Scanning", | |
| 2141 body_summary->get_mark_stack_scan_seq()); | |
| 2142 print_summary(2, "Scan RS", body_summary->get_scan_rs_seq()); | |
| 2143 print_summary(2, "Object Copy", body_summary->get_obj_copy_seq()); | |
| 2144 print_summary(2, "Termination", body_summary->get_termination_seq()); | |
| 2145 print_summary(2, "Other", body_summary->get_parallel_other_seq()); | |
| 2146 { | |
| 2147 NumberSeq* other_parts[] = { | |
| 2148 body_summary->get_update_rs_seq(), | |
| 2149 body_summary->get_ext_root_scan_seq(), | |
| 2150 body_summary->get_mark_stack_scan_seq(), | |
| 2151 body_summary->get_scan_rs_seq(), | |
| 2152 body_summary->get_obj_copy_seq(), | |
| 2153 body_summary->get_termination_seq() | |
| 2154 }; | |
| 2155 NumberSeq calc_other_times_ms(body_summary->get_parallel_seq(), | |
| 2156 7, other_parts); | |
| 2157 check_other_times(2, body_summary->get_parallel_other_seq(), | |
| 2158 &calc_other_times_ms); | |
| 2159 } | |
| 2160 print_summary(1, "Mark Closure", body_summary->get_mark_closure_seq()); | |
| 2161 print_summary(1, "Clear CT", body_summary->get_clear_ct_seq()); | |
| 2162 } else { | |
| 2163 print_summary(1, "Update RS", body_summary->get_update_rs_seq()); | |
| 2164 print_summary(1, "Ext Root Scanning", | |
| 2165 body_summary->get_ext_root_scan_seq()); | |
| 2166 print_summary(1, "Mark Stack Scanning", | |
| 2167 body_summary->get_mark_stack_scan_seq()); | |
| 2168 print_summary(1, "Scan RS", body_summary->get_scan_rs_seq()); | |
| 2169 print_summary(1, "Object Copy", body_summary->get_obj_copy_seq()); | |
| 2170 } | |
| 2171 } | |
| 2172 print_summary(1, "Other", summary->get_other_seq()); | |
| 2173 { | |
| 2174 NumberSeq calc_other_times_ms; | |
| 2175 if (body_summary != NULL) { | |
| 2176 // not abandoned | |
| 2177 if (parallel) { | |
| 2178 // parallel | |
| 2179 NumberSeq* other_parts[] = { | |
| 2180 body_summary->get_satb_drain_seq(), | |
| 2181 body_summary->get_parallel_seq(), | |
| 2182 body_summary->get_clear_ct_seq() | |
| 2183 }; | |
| 677 | 2184 calc_other_times_ms = NumberSeq(summary->get_total_seq(), |
| 2185 3, other_parts); | |
| 342 | 2186 } else { |
| 2187 // serial | |
| 2188 NumberSeq* other_parts[] = { | |
| 2189 body_summary->get_satb_drain_seq(), | |
| 2190 body_summary->get_update_rs_seq(), | |
| 2191 body_summary->get_ext_root_scan_seq(), | |
| 2192 body_summary->get_mark_stack_scan_seq(), | |
| 2193 body_summary->get_scan_rs_seq(), | |
| 2194 body_summary->get_obj_copy_seq() | |
| 2195 }; | |
| 2196 calc_other_times_ms = NumberSeq(summary->get_total_seq(), | |
| 677 | 2197 7, other_parts); |
| 342 | 2198 } |
| 2199 } else { | |
| 2200 // abandoned | |
| 677 | 2201 calc_other_times_ms = NumberSeq(); |
| 342 | 2202 } |
| 2203 check_other_times(1, summary->get_other_seq(), &calc_other_times_ms); | |
| 2204 } | |
| 2205 } else { | |
| 2206 print_indent(0); | |
| 2207 gclog_or_tty->print_cr("none"); | |
| 2208 } | |
| 2209 gclog_or_tty->print_cr(""); | |
| 2210 } | |
| 2211 | |
| 2212 void | |
| 677 | 2213 G1CollectorPolicy::print_abandoned_summary(PauseSummary* summary) const { |
| 342 | 2214 bool printed = false; |
| 677 | 2215 if (summary->get_total_seq()->num() > 0) { |
| 342 | 2216 printed = true; |
| 677 | 2217 print_summary(summary); |
| 342 | 2218 } |
| 2219 if (!printed) { | |
| 2220 print_indent(0); | |
| 2221 gclog_or_tty->print_cr("none"); | |
| 2222 gclog_or_tty->print_cr(""); | |
| 2223 } | |
| 2224 } | |
| 2225 | |
| 2226 void G1CollectorPolicy::print_tracing_info() const { | |
| 2227 if (TraceGen0Time) { | |
| 2228 gclog_or_tty->print_cr("ALL PAUSES"); | |
| 2229 print_summary_sd(0, "Total", _all_pause_times_ms); | |
| 2230 gclog_or_tty->print_cr(""); | |
| 2231 gclog_or_tty->print_cr(""); | |
| 2232 gclog_or_tty->print_cr(" Full Young GC Pauses: %8d", _full_young_pause_num); | |
| 2233 gclog_or_tty->print_cr(" Partial Young GC Pauses: %8d", _partial_young_pause_num); | |
| 2234 gclog_or_tty->print_cr(""); | |
| 2235 | |
| 677 | 2236 gclog_or_tty->print_cr("EVACUATION PAUSES"); |
| 2237 print_summary(_summary); | |
| 342 | 2238 |
| 2239 gclog_or_tty->print_cr("ABANDONED PAUSES"); | |
| 677 | 2240 print_abandoned_summary(_abandoned_summary); |
| 342 | 2241 |
| 2242 gclog_or_tty->print_cr("MISC"); | |
| 2243 print_summary_sd(0, "Stop World", _all_stop_world_times_ms); | |
| 2244 print_summary_sd(0, "Yields", _all_yield_times_ms); | |
| 2245 for (int i = 0; i < _aux_num; ++i) { | |
| 2246 if (_all_aux_times_ms[i].num() > 0) { | |
| 2247 char buffer[96]; | |
| 2248 sprintf(buffer, "Aux%d", i); | |
| 2249 print_summary_sd(0, buffer, &_all_aux_times_ms[i]); | |
| 2250 } | |
| 2251 } | |
| 2252 | |
| 2253 size_t all_region_num = _region_num_young + _region_num_tenured; | |
| 2254 gclog_or_tty->print_cr(" New Regions %8d, Young %8d (%6.2lf%%), " | |
| 2255 "Tenured %8d (%6.2lf%%)", | |
| 2256 all_region_num, | |
| 2257 _region_num_young, | |
| 2258 (double) _region_num_young / (double) all_region_num * 100.0, | |
| 2259 _region_num_tenured, | |
| 2260 (double) _region_num_tenured / (double) all_region_num * 100.0); | |
| 2261 } | |
| 2262 if (TraceGen1Time) { | |
| 2263 if (_all_full_gc_times_ms->num() > 0) { | |
| 2264 gclog_or_tty->print("\n%4d full_gcs: total time = %8.2f s", | |
| 2265 _all_full_gc_times_ms->num(), | |
| 2266 _all_full_gc_times_ms->sum() / 1000.0); | |
| 2267 gclog_or_tty->print_cr(" (avg = %8.2fms).", _all_full_gc_times_ms->avg()); | |
| 2268 gclog_or_tty->print_cr(" [std. dev = %8.2f ms, max = %8.2f ms]", | |
| 2269 _all_full_gc_times_ms->sd(), | |
| 2270 _all_full_gc_times_ms->maximum()); | |
| 2271 } | |
| 2272 } | |
| 2273 } | |
| 2274 | |
| 2275 void G1CollectorPolicy::print_yg_surv_rate_info() const { | |
| 2276 #ifndef PRODUCT | |
| 2277 _short_lived_surv_rate_group->print_surv_rate_summary(); | |
| 2278 // add this call for any other surv rate groups | |
| 2279 #endif // PRODUCT | |
| 2280 } | |
| 2281 | |
| 2282 bool | |
| 2283 G1CollectorPolicy::should_add_next_region_to_young_list() { | |
| 2284 assert(in_young_gc_mode(), "should be in young GC mode"); | |
| 2285 bool ret; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2286 size_t young_list_length = _g1->young_list()->length(); |
| 545 | 2287 size_t young_list_max_length = _young_list_target_length; |
| 2288 if (G1FixedEdenSize) { | |
| 2289 young_list_max_length -= _max_survivor_regions; | |
| 2290 } | |
| 2291 if (young_list_length < young_list_max_length) { | |
| 342 | 2292 ret = true; |
| 2293 ++_region_num_young; | |
| 2294 } else { | |
| 2295 ret = false; | |
| 2296 ++_region_num_tenured; | |
| 2297 } | |
| 2298 | |
| 2299 return ret; | |
| 2300 } | |
| 2301 | |
| 2302 #ifndef PRODUCT | |
| 2303 // for debugging, bit of a hack... | |
| 2304 static char* | |
| 2305 region_num_to_mbs(int length) { | |
| 2306 static char buffer[64]; | |
| 2307 double bytes = (double) (length * HeapRegion::GrainBytes); | |
| 2308 double mbs = bytes / (double) (1024 * 1024); | |
| 2309 sprintf(buffer, "%7.2lfMB", mbs); | |
| 2310 return buffer; | |
| 2311 } | |
| 2312 #endif // PRODUCT | |
| 2313 | |
| 545 | 2314 size_t G1CollectorPolicy::max_regions(int purpose) { |
| 342 | 2315 switch (purpose) { |
| 2316 case GCAllocForSurvived: | |
| 545 | 2317 return _max_survivor_regions; |
| 342 | 2318 case GCAllocForTenured: |
| 545 | 2319 return REGIONS_UNLIMITED; |
| 342 | 2320 default: |
| 545 | 2321 ShouldNotReachHere(); |
| 2322 return REGIONS_UNLIMITED; | |
| 342 | 2323 }; |
| 2324 } | |
| 2325 | |
| 545 | 2326 // Calculates survivor space parameters. |
| 2327 void G1CollectorPolicy::calculate_survivors_policy() | |
| 2328 { | |
| 2329 if (G1FixedSurvivorSpaceSize == 0) { | |
| 2330 _max_survivor_regions = _young_list_target_length / SurvivorRatio; | |
| 2331 } else { | |
|
547
1e458753107d
6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
apetrusenko
parents:
545
diff
changeset
|
2332 _max_survivor_regions = G1FixedSurvivorSpaceSize / HeapRegion::GrainBytes; |
| 545 | 2333 } |
| 2334 | |
| 2335 if (G1FixedTenuringThreshold) { | |
| 2336 _tenuring_threshold = MaxTenuringThreshold; | |
| 2337 } else { | |
| 2338 _tenuring_threshold = _survivors_age_table.compute_tenuring_threshold( | |
| 2339 HeapRegion::GrainWords * _max_survivor_regions); | |
| 2340 } | |
| 2341 } | |
| 2342 | |
| 342 | 2343 bool |
| 2344 G1CollectorPolicy_BestRegionsFirst::should_do_collection_pause(size_t | |
| 2345 word_size) { | |
| 2346 assert(_g1->regions_accounted_for(), "Region leakage!"); | |
| 2347 double max_pause_time_ms = _mmu_tracker->max_gc_time() * 1000.0; | |
| 2348 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2349 size_t young_list_length = _g1->young_list()->length(); |
| 545 | 2350 size_t young_list_max_length = _young_list_target_length; |
| 2351 if (G1FixedEdenSize) { | |
| 2352 young_list_max_length -= _max_survivor_regions; | |
| 2353 } | |
| 2354 bool reached_target_length = young_list_length >= young_list_max_length; | |
| 342 | 2355 |
| 2356 if (in_young_gc_mode()) { | |
| 2357 if (reached_target_length) { | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2358 assert( young_list_length > 0 && _g1->young_list()->length() > 0, |
| 342 | 2359 "invariant" ); |
| 2360 _target_pause_time_ms = max_pause_time_ms; | |
| 2361 return true; | |
| 2362 } | |
| 2363 } else { | |
| 2364 guarantee( false, "should not reach here" ); | |
| 2365 } | |
| 2366 | |
| 2367 return false; | |
| 2368 } | |
| 2369 | |
| 2370 #ifndef PRODUCT | |
| 2371 class HRSortIndexIsOKClosure: public HeapRegionClosure { | |
| 2372 CollectionSetChooser* _chooser; | |
| 2373 public: | |
| 2374 HRSortIndexIsOKClosure(CollectionSetChooser* chooser) : | |
| 2375 _chooser(chooser) {} | |
| 2376 | |
| 2377 bool doHeapRegion(HeapRegion* r) { | |
| 2378 if (!r->continuesHumongous()) { | |
| 2379 assert(_chooser->regionProperlyOrdered(r), "Ought to be."); | |
| 2380 } | |
| 2381 return false; | |
| 2382 } | |
| 2383 }; | |
| 2384 | |
| 2385 bool G1CollectorPolicy_BestRegionsFirst::assertMarkedBytesDataOK() { | |
| 2386 HRSortIndexIsOKClosure cl(_collectionSetChooser); | |
| 2387 _g1->heap_region_iterate(&cl); | |
| 2388 return true; | |
| 2389 } | |
| 2390 #endif | |
| 2391 | |
| 2392 void | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2393 G1CollectorPolicy::decide_on_conc_mark_initiation() { |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2394 // We are about to decide on whether this pause will be an |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2395 // initial-mark pause. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2396 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2397 // First, during_initial_mark_pause() should not be already set. We |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2398 // will set it here if we have to. However, it should be cleared by |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2399 // the end of the pause (it's only set for the duration of an |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2400 // initial-mark pause). |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2401 assert(!during_initial_mark_pause(), "pre-condition"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2402 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2403 if (initiate_conc_mark_if_possible()) { |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2404 // We had noticed on a previous pause that the heap occupancy has |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2405 // gone over the initiating threshold and we should start a |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2406 // concurrent marking cycle. So we might initiate one. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2407 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2408 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2409 if (!during_cycle) { |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2410 // The concurrent marking thread is not "during a cycle", i.e., |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2411 // it has completed the last one. So we can go ahead and |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2412 // initiate a new cycle. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2413 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2414 set_during_initial_mark_pause(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2415 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2416 // And we can now clear initiate_conc_mark_if_possible() as |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2417 // we've already acted on it. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2418 clear_initiate_conc_mark_if_possible(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2419 } else { |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2420 // The concurrent marking thread is still finishing up the |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2421 // previous cycle. If we start one right now the two cycles |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2422 // overlap. In particular, the concurrent marking thread might |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2423 // be in the process of clearing the next marking bitmap (which |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2424 // we will use for the next cycle if we start one). Starting a |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2425 // cycle now will be bad given that parts of the marking |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2426 // information might get cleared by the marking thread. And we |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2427 // cannot wait for the marking thread to finish the cycle as it |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2428 // periodically yields while clearing the next marking bitmap |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2429 // and, if it's in a yield point, it's waiting for us to |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2430 // finish. So, at this point we will not start a cycle and we'll |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2431 // let the concurrent marking thread complete the last one. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2432 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2433 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2434 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2435 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2436 void |
| 342 | 2437 G1CollectorPolicy_BestRegionsFirst:: |
| 2438 record_collection_pause_start(double start_time_sec, size_t start_used) { | |
| 2439 G1CollectorPolicy::record_collection_pause_start(start_time_sec, start_used); | |
| 2440 } | |
| 2441 | |
| 2442 class NextNonCSElemFinder: public HeapRegionClosure { | |
| 2443 HeapRegion* _res; | |
| 2444 public: | |
| 2445 NextNonCSElemFinder(): _res(NULL) {} | |
| 2446 bool doHeapRegion(HeapRegion* r) { | |
| 2447 if (!r->in_collection_set()) { | |
| 2448 _res = r; | |
| 2449 return true; | |
| 2450 } else { | |
| 2451 return false; | |
| 2452 } | |
| 2453 } | |
| 2454 HeapRegion* res() { return _res; } | |
| 2455 }; | |
| 2456 | |
| 2457 class KnownGarbageClosure: public HeapRegionClosure { | |
| 2458 CollectionSetChooser* _hrSorted; | |
| 2459 | |
| 2460 public: | |
| 2461 KnownGarbageClosure(CollectionSetChooser* hrSorted) : | |
| 2462 _hrSorted(hrSorted) | |
| 2463 {} | |
| 2464 | |
| 2465 bool doHeapRegion(HeapRegion* r) { | |
| 2466 // We only include humongous regions in collection | |
| 2467 // sets when concurrent mark shows that their contained object is | |
| 2468 // unreachable. | |
| 2469 | |
| 2470 // Do we have any marking information for this region? | |
| 2471 if (r->is_marked()) { | |
| 2472 // We don't include humongous regions in collection | |
| 2473 // sets because we collect them immediately at the end of a marking | |
| 2474 // cycle. We also don't include young regions because we *must* | |
| 2475 // include them in the next collection pause. | |
| 2476 if (!r->isHumongous() && !r->is_young()) { | |
| 2477 _hrSorted->addMarkedHeapRegion(r); | |
| 2478 } | |
| 2479 } | |
| 2480 return false; | |
| 2481 } | |
| 2482 }; | |
| 2483 | |
| 2484 class ParKnownGarbageHRClosure: public HeapRegionClosure { | |
| 2485 CollectionSetChooser* _hrSorted; | |
| 2486 jint _marked_regions_added; | |
| 2487 jint _chunk_size; | |
| 2488 jint _cur_chunk_idx; | |
| 2489 jint _cur_chunk_end; // Cur chunk [_cur_chunk_idx, _cur_chunk_end) | |
| 2490 int _worker; | |
| 2491 int _invokes; | |
| 2492 | |
| 2493 void get_new_chunk() { | |
| 2494 _cur_chunk_idx = _hrSorted->getParMarkedHeapRegionChunk(_chunk_size); | |
| 2495 _cur_chunk_end = _cur_chunk_idx + _chunk_size; | |
| 2496 } | |
| 2497 void add_region(HeapRegion* r) { | |
| 2498 if (_cur_chunk_idx == _cur_chunk_end) { | |
| 2499 get_new_chunk(); | |
| 2500 } | |
| 2501 assert(_cur_chunk_idx < _cur_chunk_end, "postcondition"); | |
| 2502 _hrSorted->setMarkedHeapRegion(_cur_chunk_idx, r); | |
| 2503 _marked_regions_added++; | |
| 2504 _cur_chunk_idx++; | |
| 2505 } | |
| 2506 | |
| 2507 public: | |
| 2508 ParKnownGarbageHRClosure(CollectionSetChooser* hrSorted, | |
| 2509 jint chunk_size, | |
| 2510 int worker) : | |
| 2511 _hrSorted(hrSorted), _chunk_size(chunk_size), _worker(worker), | |
| 2512 _marked_regions_added(0), _cur_chunk_idx(0), _cur_chunk_end(0), | |
| 2513 _invokes(0) | |
| 2514 {} | |
| 2515 | |
| 2516 bool doHeapRegion(HeapRegion* r) { | |
| 2517 // We only include humongous regions in collection | |
| 2518 // sets when concurrent mark shows that their contained object is | |
| 2519 // unreachable. | |
| 2520 _invokes++; | |
| 2521 | |
| 2522 // Do we have any marking information for this region? | |
| 2523 if (r->is_marked()) { | |
| 2524 // We don't include humongous regions in collection | |
| 2525 // sets because we collect them immediately at the end of a marking | |
| 2526 // cycle. | |
| 2527 // We also do not include young regions in collection sets | |
| 2528 if (!r->isHumongous() && !r->is_young()) { | |
| 2529 add_region(r); | |
| 2530 } | |
| 2531 } | |
| 2532 return false; | |
| 2533 } | |
| 2534 jint marked_regions_added() { return _marked_regions_added; } | |
| 2535 int invokes() { return _invokes; } | |
| 2536 }; | |
| 2537 | |
| 2538 class ParKnownGarbageTask: public AbstractGangTask { | |
| 2539 CollectionSetChooser* _hrSorted; | |
| 2540 jint _chunk_size; | |
| 2541 G1CollectedHeap* _g1; | |
| 2542 public: | |
| 2543 ParKnownGarbageTask(CollectionSetChooser* hrSorted, jint chunk_size) : | |
| 2544 AbstractGangTask("ParKnownGarbageTask"), | |
| 2545 _hrSorted(hrSorted), _chunk_size(chunk_size), | |
| 2546 _g1(G1CollectedHeap::heap()) | |
| 2547 {} | |
| 2548 | |
| 2549 void work(int i) { | |
| 2550 ParKnownGarbageHRClosure parKnownGarbageCl(_hrSorted, _chunk_size, i); | |
| 2551 // Back to zero for the claim value. | |
| 355 | 2552 _g1->heap_region_par_iterate_chunked(&parKnownGarbageCl, i, |
| 2553 HeapRegion::InitialClaimValue); | |
| 342 | 2554 jint regions_added = parKnownGarbageCl.marked_regions_added(); |
| 2555 _hrSorted->incNumMarkedHeapRegions(regions_added); | |
| 2556 if (G1PrintParCleanupStats) { | |
| 2557 gclog_or_tty->print(" Thread %d called %d times, added %d regions to list.\n", | |
| 2558 i, parKnownGarbageCl.invokes(), regions_added); | |
| 2559 } | |
| 2560 } | |
| 2561 }; | |
| 2562 | |
| 2563 void | |
| 2564 G1CollectorPolicy_BestRegionsFirst:: | |
| 2565 record_concurrent_mark_cleanup_end(size_t freed_bytes, | |
| 2566 size_t max_live_bytes) { | |
| 2567 double start; | |
| 2568 if (G1PrintParCleanupStats) start = os::elapsedTime(); | |
| 2569 record_concurrent_mark_cleanup_end_work1(freed_bytes, max_live_bytes); | |
| 2570 | |
| 2571 _collectionSetChooser->clearMarkedHeapRegions(); | |
| 2572 double clear_marked_end; | |
| 2573 if (G1PrintParCleanupStats) { | |
| 2574 clear_marked_end = os::elapsedTime(); | |
| 2575 gclog_or_tty->print_cr(" clear marked regions + work1: %8.3f ms.", | |
| 2576 (clear_marked_end - start)*1000.0); | |
| 2577 } | |
| 2578 if (ParallelGCThreads > 0) { | |
| 2579 const size_t OverpartitionFactor = 4; | |
|
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1394
diff
changeset
|
2580 const size_t MinWorkUnit = 8; |
|
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1394
diff
changeset
|
2581 const size_t WorkUnit = |
| 342 | 2582 MAX2(_g1->n_regions() / (ParallelGCThreads * OverpartitionFactor), |
|
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1394
diff
changeset
|
2583 MinWorkUnit); |
| 342 | 2584 _collectionSetChooser->prepareForAddMarkedHeapRegionsPar(_g1->n_regions(), |
|
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1394
diff
changeset
|
2585 WorkUnit); |
| 342 | 2586 ParKnownGarbageTask parKnownGarbageTask(_collectionSetChooser, |
|
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1394
diff
changeset
|
2587 (int) WorkUnit); |
| 342 | 2588 _g1->workers()->run_task(&parKnownGarbageTask); |
| 355 | 2589 |
| 2590 assert(_g1->check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 2591 "sanity check"); | |
| 342 | 2592 } else { |
| 2593 KnownGarbageClosure knownGarbagecl(_collectionSetChooser); | |
| 2594 _g1->heap_region_iterate(&knownGarbagecl); | |
| 2595 } | |
| 2596 double known_garbage_end; | |
| 2597 if (G1PrintParCleanupStats) { | |
| 2598 known_garbage_end = os::elapsedTime(); | |
| 2599 gclog_or_tty->print_cr(" compute known garbage: %8.3f ms.", | |
| 2600 (known_garbage_end - clear_marked_end)*1000.0); | |
| 2601 } | |
| 2602 _collectionSetChooser->sortMarkedHeapRegions(); | |
| 2603 double sort_end; | |
| 2604 if (G1PrintParCleanupStats) { | |
| 2605 sort_end = os::elapsedTime(); | |
| 2606 gclog_or_tty->print_cr(" sorting: %8.3f ms.", | |
| 2607 (sort_end - known_garbage_end)*1000.0); | |
| 2608 } | |
| 2609 | |
| 2610 record_concurrent_mark_cleanup_end_work2(); | |
| 2611 double work2_end; | |
| 2612 if (G1PrintParCleanupStats) { | |
| 2613 work2_end = os::elapsedTime(); | |
| 2614 gclog_or_tty->print_cr(" work2: %8.3f ms.", | |
| 2615 (work2_end - sort_end)*1000.0); | |
| 2616 } | |
| 2617 } | |
| 2618 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2619 // Add the heap region at the head of the non-incremental collection set |
| 342 | 2620 void G1CollectorPolicy:: |
| 2621 add_to_collection_set(HeapRegion* hr) { | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2622 assert(_inc_cset_build_state == Active, "Precondition"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2623 assert(!hr->is_young(), "non-incremental add of young region"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2624 |
| 1282 | 2625 if (G1PrintHeapRegions) { |
| 1388 | 2626 gclog_or_tty->print_cr("added region to cset " |
| 2627 "%d:["PTR_FORMAT", "PTR_FORMAT"], " | |
| 2628 "top "PTR_FORMAT", %s", | |
| 2629 hr->hrs_index(), hr->bottom(), hr->end(), | |
| 2630 hr->top(), hr->is_young() ? "YOUNG" : "NOT_YOUNG"); | |
| 342 | 2631 } |
| 2632 | |
| 2633 if (_g1->mark_in_progress()) | |
| 2634 _g1->concurrent_mark()->registerCSetRegion(hr); | |
| 2635 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2636 assert(!hr->in_collection_set(), "should not already be in the CSet"); |
| 342 | 2637 hr->set_in_collection_set(true); |
| 2638 hr->set_next_in_collection_set(_collection_set); | |
| 2639 _collection_set = hr; | |
| 2640 _collection_set_size++; | |
| 2641 _collection_set_bytes_used_before += hr->used(); | |
| 526 | 2642 _g1->register_region_with_in_cset_fast_test(hr); |
| 342 | 2643 } |
| 2644 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2645 // Initialize the per-collection-set information |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2646 void G1CollectorPolicy::start_incremental_cset_building() { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2647 assert(_inc_cset_build_state == Inactive, "Precondition"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2648 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2649 _inc_cset_head = NULL; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2650 _inc_cset_tail = NULL; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2651 _inc_cset_size = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2652 _inc_cset_bytes_used_before = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2653 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2654 if (in_young_gc_mode()) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2655 _inc_cset_young_index = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2656 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2657 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2658 _inc_cset_max_finger = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2659 _inc_cset_recorded_young_bytes = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2660 _inc_cset_recorded_rs_lengths = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2661 _inc_cset_predicted_elapsed_time_ms = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2662 _inc_cset_predicted_bytes_to_copy = 0; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2663 _inc_cset_build_state = Active; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2664 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2665 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2666 void G1CollectorPolicy::add_to_incremental_cset_info(HeapRegion* hr, size_t rs_length) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2667 // This routine is used when: |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2668 // * adding survivor regions to the incremental cset at the end of an |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2669 // evacuation pause, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2670 // * adding the current allocation region to the incremental cset |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2671 // when it is retired, and |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2672 // * updating existing policy information for a region in the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2673 // incremental cset via young list RSet sampling. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2674 // Therefore this routine may be called at a safepoint by the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2675 // VM thread, or in-between safepoints by mutator threads (when |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2676 // retiring the current allocation region) or a concurrent |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2677 // refine thread (RSet sampling). |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2678 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2679 double region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, true); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2680 size_t used_bytes = hr->used(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2681 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2682 _inc_cset_recorded_rs_lengths += rs_length; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2683 _inc_cset_predicted_elapsed_time_ms += region_elapsed_time_ms; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2684 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2685 _inc_cset_bytes_used_before += used_bytes; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2686 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2687 // Cache the values we have added to the aggregated informtion |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2688 // in the heap region in case we have to remove this region from |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2689 // the incremental collection set, or it is updated by the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2690 // rset sampling code |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2691 hr->set_recorded_rs_length(rs_length); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2692 hr->set_predicted_elapsed_time_ms(region_elapsed_time_ms); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2693 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2694 #if PREDICTIONS_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2695 size_t bytes_to_copy = predict_bytes_to_copy(hr); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2696 _inc_cset_predicted_bytes_to_copy += bytes_to_copy; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2697 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2698 // Record the number of bytes used in this region |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2699 _inc_cset_recorded_young_bytes += used_bytes; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2700 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2701 // Cache the values we have added to the aggregated informtion |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2702 // in the heap region in case we have to remove this region from |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2703 // the incremental collection set, or it is updated by the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2704 // rset sampling code |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2705 hr->set_predicted_bytes_to_copy(bytes_to_copy); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2706 #endif // PREDICTIONS_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2707 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2708 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2709 void G1CollectorPolicy::remove_from_incremental_cset_info(HeapRegion* hr) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2710 // This routine is currently only called as part of the updating of |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2711 // existing policy information for regions in the incremental cset that |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2712 // is performed by the concurrent refine thread(s) as part of young list |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2713 // RSet sampling. Therefore we should not be at a safepoint. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2714 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2715 assert(!SafepointSynchronize::is_at_safepoint(), "should not be at safepoint"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2716 assert(hr->is_young(), "it should be"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2717 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2718 size_t used_bytes = hr->used(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2719 size_t old_rs_length = hr->recorded_rs_length(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2720 double old_elapsed_time_ms = hr->predicted_elapsed_time_ms(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2721 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2722 // Subtract the old recorded/predicted policy information for |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2723 // the given heap region from the collection set info. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2724 _inc_cset_recorded_rs_lengths -= old_rs_length; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2725 _inc_cset_predicted_elapsed_time_ms -= old_elapsed_time_ms; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2726 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2727 _inc_cset_bytes_used_before -= used_bytes; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2728 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2729 // Clear the values cached in the heap region |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2730 hr->set_recorded_rs_length(0); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2731 hr->set_predicted_elapsed_time_ms(0); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2732 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2733 #if PREDICTIONS_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2734 size_t old_predicted_bytes_to_copy = hr->predicted_bytes_to_copy(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2735 _inc_cset_predicted_bytes_to_copy -= old_predicted_bytes_to_copy; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2736 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2737 // Subtract the number of bytes used in this region |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2738 _inc_cset_recorded_young_bytes -= used_bytes; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2739 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2740 // Clear the values cached in the heap region |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2741 hr->set_predicted_bytes_to_copy(0); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2742 #endif // PREDICTIONS_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2743 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2744 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2745 void G1CollectorPolicy::update_incremental_cset_info(HeapRegion* hr, size_t new_rs_length) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2746 // Update the collection set information that is dependent on the new RS length |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2747 assert(hr->is_young(), "Precondition"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2748 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2749 remove_from_incremental_cset_info(hr); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2750 add_to_incremental_cset_info(hr, new_rs_length); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2751 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2752 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2753 void G1CollectorPolicy::add_region_to_incremental_cset_common(HeapRegion* hr) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2754 assert( hr->is_young(), "invariant"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2755 assert( hr->young_index_in_cset() == -1, "invariant" ); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2756 assert(_inc_cset_build_state == Active, "Precondition"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2757 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2758 // We need to clear and set the cached recorded/cached collection set |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2759 // information in the heap region here (before the region gets added |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2760 // to the collection set). An individual heap region's cached values |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2761 // are calculated, aggregated with the policy collection set info, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2762 // and cached in the heap region here (initially) and (subsequently) |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2763 // by the Young List sampling code. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2764 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2765 size_t rs_length = hr->rem_set()->occupied(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2766 add_to_incremental_cset_info(hr, rs_length); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2767 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2768 HeapWord* hr_end = hr->end(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2769 _inc_cset_max_finger = MAX2(_inc_cset_max_finger, hr_end); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2770 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2771 assert(!hr->in_collection_set(), "invariant"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2772 hr->set_in_collection_set(true); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2773 assert( hr->next_in_collection_set() == NULL, "invariant"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2774 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2775 _inc_cset_size++; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2776 _g1->register_region_with_in_cset_fast_test(hr); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2777 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2778 hr->set_young_index_in_cset((int) _inc_cset_young_index); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2779 ++_inc_cset_young_index; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2780 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2781 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2782 // Add the region at the RHS of the incremental cset |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2783 void G1CollectorPolicy::add_region_to_incremental_cset_rhs(HeapRegion* hr) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2784 // We should only ever be appending survivors at the end of a pause |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2785 assert( hr->is_survivor(), "Logic"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2786 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2787 // Do the 'common' stuff |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2788 add_region_to_incremental_cset_common(hr); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2789 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2790 // Now add the region at the right hand side |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2791 if (_inc_cset_tail == NULL) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2792 assert(_inc_cset_head == NULL, "invariant"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2793 _inc_cset_head = hr; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2794 } else { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2795 _inc_cset_tail->set_next_in_collection_set(hr); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2796 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2797 _inc_cset_tail = hr; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2798 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2799 if (G1PrintHeapRegions) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2800 gclog_or_tty->print_cr(" added region to incremental cset (RHS) " |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2801 "%d:["PTR_FORMAT", "PTR_FORMAT"], " |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2802 "top "PTR_FORMAT", young %s", |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2803 hr->hrs_index(), hr->bottom(), hr->end(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2804 hr->top(), (hr->is_young()) ? "YES" : "NO"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2805 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2806 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2807 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2808 // Add the region to the LHS of the incremental cset |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2809 void G1CollectorPolicy::add_region_to_incremental_cset_lhs(HeapRegion* hr) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2810 // Survivors should be added to the RHS at the end of a pause |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2811 assert(!hr->is_survivor(), "Logic"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2812 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2813 // Do the 'common' stuff |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2814 add_region_to_incremental_cset_common(hr); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2815 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2816 // Add the region at the left hand side |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2817 hr->set_next_in_collection_set(_inc_cset_head); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2818 if (_inc_cset_head == NULL) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2819 assert(_inc_cset_tail == NULL, "Invariant"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2820 _inc_cset_tail = hr; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2821 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2822 _inc_cset_head = hr; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2823 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2824 if (G1PrintHeapRegions) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2825 gclog_or_tty->print_cr(" added region to incremental cset (LHS) " |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2826 "%d:["PTR_FORMAT", "PTR_FORMAT"], " |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2827 "top "PTR_FORMAT", young %s", |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2828 hr->hrs_index(), hr->bottom(), hr->end(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2829 hr->top(), (hr->is_young()) ? "YES" : "NO"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2830 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2831 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2832 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2833 #ifndef PRODUCT |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2834 void G1CollectorPolicy::print_collection_set(HeapRegion* list_head, outputStream* st) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2835 assert(list_head == inc_cset_head() || list_head == collection_set(), "must be"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2836 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2837 st->print_cr("\nCollection_set:"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2838 HeapRegion* csr = list_head; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2839 while (csr != NULL) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2840 HeapRegion* next = csr->next_in_collection_set(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2841 assert(csr->in_collection_set(), "bad CS"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2842 st->print_cr(" [%08x-%08x], t: %08x, P: %08x, N: %08x, C: %08x, " |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2843 "age: %4d, y: %d, surv: %d", |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2844 csr->bottom(), csr->end(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2845 csr->top(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2846 csr->prev_top_at_mark_start(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2847 csr->next_top_at_mark_start(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2848 csr->top_at_conc_mark_count(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2849 csr->age_in_surv_rate_group_cond(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2850 csr->is_young(), |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2851 csr->is_survivor()); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2852 csr = next; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2853 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2854 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2855 #endif // !PRODUCT |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2856 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2857 bool |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2858 G1CollectorPolicy_BestRegionsFirst::choose_collection_set() { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2859 // Set this here - in case we're not doing young collections. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2860 double non_young_start_time_sec = os::elapsedTime(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2861 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2862 // The result that this routine will return. This will be set to |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2863 // false if: |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2864 // * we're doing a young or partially young collection and we |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2865 // have added the youg regions to collection set, or |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2866 // * we add old regions to the collection set. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2867 bool abandon_collection = true; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2868 |
| 342 | 2869 start_recording_regions(); |
| 2870 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1087
diff
changeset
|
2871 guarantee(_target_pause_time_ms > -1.0 |
|
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1087
diff
changeset
|
2872 NOT_PRODUCT(|| Universe::heap()->gc_cause() == GCCause::_scavenge_alot), |
| 677 | 2873 "_target_pause_time_ms should have been set!"); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1087
diff
changeset
|
2874 #ifndef PRODUCT |
|
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1087
diff
changeset
|
2875 if (_target_pause_time_ms <= -1.0) { |
|
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1087
diff
changeset
|
2876 assert(ScavengeALot && Universe::heap()->gc_cause() == GCCause::_scavenge_alot, "Error"); |
|
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1087
diff
changeset
|
2877 _target_pause_time_ms = _mmu_tracker->max_gc_time() * 1000.0; |
|
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1087
diff
changeset
|
2878 } |
|
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1087
diff
changeset
|
2879 #endif |
| 677 | 2880 assert(_collection_set == NULL, "Precondition"); |
| 342 | 2881 |
| 2882 double base_time_ms = predict_base_elapsed_time_ms(_pending_cards); | |
| 2883 double predicted_pause_time_ms = base_time_ms; | |
| 2884 | |
| 2885 double target_time_ms = _target_pause_time_ms; | |
| 2886 double time_remaining_ms = target_time_ms - base_time_ms; | |
| 2887 | |
| 2888 // the 10% and 50% values are arbitrary... | |
| 2889 if (time_remaining_ms < 0.10*target_time_ms) { | |
| 2890 time_remaining_ms = 0.50 * target_time_ms; | |
| 2891 _within_target = false; | |
| 2892 } else { | |
| 2893 _within_target = true; | |
| 2894 } | |
| 2895 | |
| 2896 // We figure out the number of bytes available for future to-space. | |
| 2897 // For new regions without marking information, we must assume the | |
| 2898 // worst-case of complete survival. If we have marking information for a | |
| 2899 // region, we can bound the amount of live data. We can add a number of | |
| 2900 // such regions, as long as the sum of the live data bounds does not | |
| 2901 // exceed the available evacuation space. | |
| 2902 size_t max_live_bytes = _g1->free_regions() * HeapRegion::GrainBytes; | |
| 2903 | |
| 2904 size_t expansion_bytes = | |
| 2905 _g1->expansion_regions() * HeapRegion::GrainBytes; | |
| 2906 | |
| 677 | 2907 _collection_set_bytes_used_before = 0; |
| 2908 _collection_set_size = 0; | |
| 342 | 2909 |
| 2910 // Adjust for expansion and slop. | |
| 2911 max_live_bytes = max_live_bytes + expansion_bytes; | |
| 2912 | |
| 677 | 2913 assert(_g1->regions_accounted_for(), "Region leakage!"); |
| 342 | 2914 |
| 2915 HeapRegion* hr; | |
| 2916 if (in_young_gc_mode()) { | |
| 2917 double young_start_time_sec = os::elapsedTime(); | |
| 2918 | |
| 2919 if (G1PolicyVerbose > 0) { | |
| 2920 gclog_or_tty->print_cr("Adding %d young regions to the CSet", | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2921 _g1->young_list()->length()); |
| 342 | 2922 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2923 |
| 342 | 2924 _young_cset_length = 0; |
| 2925 _last_young_gc_full = full_young_gcs() ? true : false; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2926 |
| 342 | 2927 if (_last_young_gc_full) |
| 2928 ++_full_young_pause_num; | |
| 2929 else | |
| 2930 ++_partial_young_pause_num; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2931 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2932 // The young list is laid with the survivor regions from the previous |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2933 // pause are appended to the RHS of the young list, i.e. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2934 // [Newly Young Regions ++ Survivors from last pause]. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2935 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2936 hr = _g1->young_list()->first_survivor_region(); |
| 342 | 2937 while (hr != NULL) { |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2938 assert(hr->is_survivor(), "badly formed young list"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2939 hr->set_young(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2940 hr = hr->get_next_young_region(); |
| 342 | 2941 } |
| 2942 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2943 // Clear the fields that point to the survivor list - they are |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2944 // all young now. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2945 _g1->young_list()->clear_survivors(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2946 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2947 if (_g1->mark_in_progress()) |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2948 _g1->concurrent_mark()->register_collection_set_finger(_inc_cset_max_finger); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2949 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2950 _young_cset_length = _inc_cset_young_index; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2951 _collection_set = _inc_cset_head; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2952 _collection_set_size = _inc_cset_size; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2953 _collection_set_bytes_used_before = _inc_cset_bytes_used_before; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2954 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2955 // For young regions in the collection set, we assume the worst |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2956 // case of complete survival |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2957 max_live_bytes -= _inc_cset_size * HeapRegion::GrainBytes; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2958 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2959 time_remaining_ms -= _inc_cset_predicted_elapsed_time_ms; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2960 predicted_pause_time_ms += _inc_cset_predicted_elapsed_time_ms; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2961 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2962 // The number of recorded young regions is the incremental |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2963 // collection set's current size |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2964 set_recorded_young_regions(_inc_cset_size); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2965 set_recorded_rs_lengths(_inc_cset_recorded_rs_lengths); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2966 set_recorded_young_bytes(_inc_cset_recorded_young_bytes); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2967 #if PREDICTIONS_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2968 set_predicted_bytes_to_copy(_inc_cset_predicted_bytes_to_copy); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2969 #endif // PREDICTIONS_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2970 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2971 if (G1PolicyVerbose > 0) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2972 gclog_or_tty->print_cr(" Added " PTR_FORMAT " Young Regions to CS.", |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2973 _inc_cset_size); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2974 gclog_or_tty->print_cr(" (" SIZE_FORMAT " KB left in heap.)", |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2975 max_live_bytes/K); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2976 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2977 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2978 assert(_inc_cset_size == _g1->young_list()->length(), "Invariant"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2979 if (_inc_cset_size > 0) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2980 assert(_collection_set != NULL, "Invariant"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2981 abandon_collection = false; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2982 } |
| 342 | 2983 |
| 2984 double young_end_time_sec = os::elapsedTime(); | |
| 2985 _recorded_young_cset_choice_time_ms = | |
| 2986 (young_end_time_sec - young_start_time_sec) * 1000.0; | |
| 2987 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2988 // We are doing young collections so reset this. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2989 non_young_start_time_sec = young_end_time_sec; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2990 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2991 // Note we can use either _collection_set_size or |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2992 // _young_cset_length here |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2993 if (_collection_set_size > 0 && _last_young_gc_full) { |
| 342 | 2994 // don't bother adding more regions... |
| 2995 goto choose_collection_set_end; | |
| 2996 } | |
| 2997 } | |
| 2998 | |
| 2999 if (!in_young_gc_mode() || !full_young_gcs()) { | |
| 3000 bool should_continue = true; | |
| 3001 NumberSeq seq; | |
| 3002 double avg_prediction = 100000000000000000.0; // something very large | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3003 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3004 // Save the current size of the collection set to detect |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3005 // if we actually added any old regions. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3006 size_t n_young_regions = _collection_set_size; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3007 |
| 342 | 3008 do { |
| 3009 hr = _collectionSetChooser->getNextMarkedRegion(time_remaining_ms, | |
| 3010 avg_prediction); | |
| 677 | 3011 if (hr != NULL) { |
| 342 | 3012 double predicted_time_ms = predict_region_elapsed_time_ms(hr, false); |
| 3013 time_remaining_ms -= predicted_time_ms; | |
| 3014 predicted_pause_time_ms += predicted_time_ms; | |
| 3015 add_to_collection_set(hr); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3016 record_non_young_cset_region(hr); |
| 342 | 3017 max_live_bytes -= MIN2(hr->max_live_bytes(), max_live_bytes); |
| 3018 if (G1PolicyVerbose > 0) { | |
| 3019 gclog_or_tty->print_cr(" (" SIZE_FORMAT " KB left in heap.)", | |
| 3020 max_live_bytes/K); | |
| 3021 } | |
| 3022 seq.add(predicted_time_ms); | |
| 3023 avg_prediction = seq.avg() + seq.sd(); | |
| 3024 } | |
| 3025 should_continue = | |
| 3026 ( hr != NULL) && | |
| 3027 ( (adaptive_young_list_length()) ? time_remaining_ms > 0.0 | |
| 3028 : _collection_set_size < _young_list_fixed_length ); | |
| 3029 } while (should_continue); | |
| 3030 | |
| 3031 if (!adaptive_young_list_length() && | |
| 3032 _collection_set_size < _young_list_fixed_length) | |
| 3033 _should_revert_to_full_young_gcs = true; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3034 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3035 if (_collection_set_size > n_young_regions) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3036 // We actually added old regions to the collection set |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3037 // so we are not abandoning this collection. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3038 abandon_collection = false; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3039 } |
| 342 | 3040 } |
| 3041 | |
| 3042 choose_collection_set_end: | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3043 stop_incremental_cset_building(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3044 |
| 342 | 3045 count_CS_bytes_used(); |
| 3046 | |
| 3047 end_recording_regions(); | |
| 3048 | |
| 3049 double non_young_end_time_sec = os::elapsedTime(); | |
| 3050 _recorded_non_young_cset_choice_time_ms = | |
| 3051 (non_young_end_time_sec - non_young_start_time_sec) * 1000.0; | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3052 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3053 return abandon_collection; |
| 342 | 3054 } |
| 3055 | |
| 3056 void G1CollectorPolicy_BestRegionsFirst::record_full_collection_end() { | |
| 3057 G1CollectorPolicy::record_full_collection_end(); | |
| 3058 _collectionSetChooser->updateAfterFullCollection(); | |
| 3059 } | |
| 3060 | |
| 3061 void G1CollectorPolicy_BestRegionsFirst:: | |
| 3062 expand_if_possible(size_t numRegions) { | |
| 3063 size_t expansion_bytes = numRegions * HeapRegion::GrainBytes; | |
| 3064 _g1->expand(expansion_bytes); | |
| 3065 } | |
| 3066 | |
| 3067 void G1CollectorPolicy_BestRegionsFirst:: | |
| 677 | 3068 record_collection_pause_end(bool abandoned) { |
| 3069 G1CollectorPolicy::record_collection_pause_end(abandoned); | |
| 342 | 3070 assert(assertMarkedBytesDataOK(), "Marked regions not OK at pause end."); |
| 3071 } |