Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 3888:4fe626cbf0bf
7066841: remove MacroAssembler::br_on_reg_cond() on sparc
Summary: Remove the macro assembler routine br_on_reg_cond() and replace the remaining calls to that routine with an equivalent.
Reviewed-by: kvn, iveresov
author | johnc |
---|---|
date | Wed, 31 Aug 2011 10:16:02 -0700 |
parents | ae73da50be4b |
children | 20213c8a3c40 |
rev | line source |
---|---|
342 | 1 /* |
2152 | 2 * Copyright (c) 2001, 2011, 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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
27 #include "gc_implementation/g1/concurrentMark.hpp" | |
28 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
30 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
31 #include "gc_implementation/g1/heapRegionRemSet.hpp" | |
32 #include "gc_implementation/shared/gcPolicyCounters.hpp" | |
33 #include "runtime/arguments.hpp" | |
34 #include "runtime/java.hpp" | |
35 #include "runtime/mutexLocker.hpp" | |
36 #include "utilities/debug.hpp" | |
342 | 37 |
38 #define PREDICTIONS_VERBOSE 0 | |
39 | |
40 // <NEW PREDICTION> | |
41 | |
42 // Different defaults for different number of GC threads | |
43 // They were chosen by running GCOld and SPECjbb on debris with different | |
44 // numbers of GC threads and choosing them based on the results | |
45 | |
46 // all the same | |
47 static double rs_length_diff_defaults[] = { | |
48 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 | |
49 }; | |
50 | |
51 static double cost_per_card_ms_defaults[] = { | |
52 0.01, 0.005, 0.005, 0.003, 0.003, 0.002, 0.002, 0.0015 | |
53 }; | |
54 | |
55 // all the same | |
56 static double fully_young_cards_per_entry_ratio_defaults[] = { | |
57 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 | |
58 }; | |
59 | |
60 static double cost_per_entry_ms_defaults[] = { | |
61 0.015, 0.01, 0.01, 0.008, 0.008, 0.0055, 0.0055, 0.005 | |
62 }; | |
63 | |
64 static double cost_per_byte_ms_defaults[] = { | |
65 0.00006, 0.00003, 0.00003, 0.000015, 0.000015, 0.00001, 0.00001, 0.000009 | |
66 }; | |
67 | |
68 // these should be pretty consistent | |
69 static double constant_other_time_ms_defaults[] = { | |
70 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0 | |
71 }; | |
72 | |
73 | |
74 static double young_other_cost_per_region_ms_defaults[] = { | |
75 0.3, 0.2, 0.2, 0.15, 0.15, 0.12, 0.12, 0.1 | |
76 }; | |
77 | |
78 static double non_young_other_cost_per_region_ms_defaults[] = { | |
79 1.0, 0.7, 0.7, 0.5, 0.5, 0.42, 0.42, 0.30 | |
80 }; | |
81 | |
82 // </NEW PREDICTION> | |
83 | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
84 // Help class for avoiding interleaved logging |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
85 class LineBuffer: public StackObj { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
86 |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
87 private: |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
88 static const int BUFFER_LEN = 1024; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
89 static const int INDENT_CHARS = 3; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
90 char _buffer[BUFFER_LEN]; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
91 int _indent_level; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
92 int _cur; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
93 |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
94 void vappend(const char* format, va_list ap) { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
95 int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
96 if (res != -1) { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
97 _cur += res; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
98 } else { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
99 DEBUG_ONLY(warning("buffer too small in LineBuffer");) |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
100 _buffer[BUFFER_LEN -1] = 0; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
101 _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
102 } |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
103 } |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
104 |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
105 public: |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
106 explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
107 for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
108 _buffer[_cur] = ' '; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
109 } |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
110 } |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
111 |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
112 #ifndef PRODUCT |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
113 ~LineBuffer() { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
114 assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?"); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
115 } |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
116 #endif |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
117 |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
118 void append(const char* format, ...) { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
119 va_list ap; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
120 va_start(ap, format); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
121 vappend(format, ap); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
122 va_end(ap); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
123 } |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
124 |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
125 void append_and_print_cr(const char* format, ...) { |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
126 va_list ap; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
127 va_start(ap, format); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
128 vappend(format, ap); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
129 va_end(ap); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
130 gclog_or_tty->print_cr("%s", _buffer); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
131 _cur = _indent_level * INDENT_CHARS; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
132 } |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
133 }; |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
134 |
342 | 135 G1CollectorPolicy::G1CollectorPolicy() : |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
136 _parallel_gc_threads(G1CollectedHeap::use_parallel_gc_threads() |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
137 ? ParallelGCThreads : 1), |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
138 |
342 | 139 _n_pauses(0), |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
140 _recent_rs_scan_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), |
342 | 141 _recent_pause_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), |
142 _recent_rs_sizes(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
143 _recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
144 _all_pause_times_ms(new NumberSeq()), | |
145 _stop_world_start(0.0), | |
146 _all_stop_world_times_ms(new NumberSeq()), | |
147 _all_yield_times_ms(new NumberSeq()), | |
148 | |
149 _all_mod_union_times_ms(new NumberSeq()), | |
150 | |
677 | 151 _summary(new Summary()), |
342 | 152 |
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
153 #ifndef PRODUCT |
342 | 154 _cur_clear_ct_time_ms(0.0), |
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
155 _min_clear_cc_time_ms(-1.0), |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
156 _max_clear_cc_time_ms(-1.0), |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
157 _cur_clear_cc_time_ms(0.0), |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
158 _cum_clear_cc_time_ms(0.0), |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
159 _num_cc_clears(0L), |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
160 #endif |
342 | 161 |
162 _region_num_young(0), | |
163 _region_num_tenured(0), | |
164 _prev_region_num_young(0), | |
165 _prev_region_num_tenured(0), | |
166 | |
167 _aux_num(10), | |
168 _all_aux_times_ms(new NumberSeq[_aux_num]), | |
169 _cur_aux_start_times_ms(new double[_aux_num]), | |
170 _cur_aux_times_ms(new double[_aux_num]), | |
171 _cur_aux_times_set(new bool[_aux_num]), | |
172 | |
173 _concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
174 _concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
175 | |
176 // <NEW PREDICTION> | |
177 | |
178 _alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
179 _prev_collection_pause_end_ms(0.0), | |
180 _pending_card_diff_seq(new TruncatedSeq(TruncatedSeqLength)), | |
181 _rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)), | |
182 _cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
183 _fully_young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)), | |
184 _partially_young_cards_per_entry_ratio_seq( | |
185 new TruncatedSeq(TruncatedSeqLength)), | |
186 _cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
187 _partially_young_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
188 _cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
189 _cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)), | |
190 _constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
191 _young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
192 _non_young_other_cost_per_region_ms_seq( | |
193 new TruncatedSeq(TruncatedSeqLength)), | |
194 | |
195 _pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)), | |
196 _scanned_cards_seq(new TruncatedSeq(TruncatedSeqLength)), | |
197 _rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)), | |
198 | |
751 | 199 _pause_time_target_ms((double) MaxGCPauseMillis), |
342 | 200 |
201 // </NEW PREDICTION> | |
202 | |
203 _full_young_gcs(true), | |
204 _full_young_pause_num(0), | |
205 _partial_young_pause_num(0), | |
206 | |
207 _during_marking(false), | |
208 _in_marking_window(false), | |
209 _in_marking_window_im(false), | |
210 | |
211 _known_garbage_ratio(0.0), | |
212 _known_garbage_bytes(0), | |
213 | |
214 _young_gc_eff_seq(new TruncatedSeq(TruncatedSeqLength)), | |
215 | |
216 _recent_prev_end_times_for_all_gcs_sec(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
217 | |
218 _recent_CS_bytes_used_before(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
219 _recent_CS_bytes_surviving(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
220 | |
221 _recent_avg_pause_time_ratio(0.0), | |
222 _num_markings(0), | |
223 _n_marks(0), | |
224 _n_pauses_at_mark_end(0), | |
225 | |
226 _all_full_gc_times_ms(new NumberSeq()), | |
227 | |
228 // G1PausesBtwnConcMark defaults to -1 | |
229 // so the hack is to do the cast QQQ FIXME | |
230 _pauses_btwn_concurrent_mark((size_t)G1PausesBtwnConcMark), | |
231 _n_marks_since_last_pause(0), | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
232 _initiate_conc_mark_if_possible(false), |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
233 _during_initial_mark_pause(false), |
342 | 234 _should_revert_to_full_young_gcs(false), |
235 _last_full_young_gc(false), | |
236 | |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
237 _eden_bytes_before_gc(0), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
238 _survivor_bytes_before_gc(0), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
239 _capacity_before_gc(0), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
240 |
342 | 241 _prev_collection_pause_used_at_end_bytes(0), |
242 | |
243 _collection_set(NULL), | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
244 _collection_set_size(0), |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
245 _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
|
246 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
247 // Incremental CSet attributes |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
248 _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
|
249 _inc_cset_head(NULL), |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
250 _inc_cset_tail(NULL), |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
251 _inc_cset_size(0), |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
252 _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
|
253 _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
|
254 _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
|
255 _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
|
256 _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
|
257 _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
|
258 _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
|
259 |
342 | 260 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
261 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
262 #endif // _MSC_VER | |
263 | |
264 _short_lived_surv_rate_group(new SurvRateGroup(this, "Short Lived", | |
265 G1YoungSurvRateNumRegionsSummary)), | |
266 _survivor_surv_rate_group(new SurvRateGroup(this, "Survivor", | |
545 | 267 G1YoungSurvRateNumRegionsSummary)), |
342 | 268 // add here any more surv rate groups |
545 | 269 _recorded_survivor_regions(0), |
270 _recorded_survivor_head(NULL), | |
271 _recorded_survivor_tail(NULL), | |
1356 | 272 _survivors_age_table(true), |
273 | |
274 _gc_overhead_perc(0.0) | |
545 | 275 |
342 | 276 { |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
277 // 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
|
278 // 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
|
279 // so it's done as soon as possible. |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
280 HeapRegion::setup_heap_region_size(Arguments::min_heap_size()); |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1111
diff
changeset
|
281 HeapRegionRemSet::setup_remset_size(); |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
282 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
283 // Verify PLAB sizes |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
284 const uint region_size = HeapRegion::GrainWords; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
285 if (YoungPLABSize > region_size || OldPLABSize > region_size) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
286 char buffer[128]; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
287 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
|
288 OldPLABSize > region_size ? "Old" : "Young", region_size); |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
289 vm_exit_during_initialization(buffer); |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
290 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1388
diff
changeset
|
291 |
342 | 292 _recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime()); |
293 _prev_collection_pause_end_ms = os::elapsedTime() * 1000.0; | |
294 | |
1611 | 295 _par_last_gc_worker_start_times_ms = new double[_parallel_gc_threads]; |
342 | 296 _par_last_ext_root_scan_times_ms = new double[_parallel_gc_threads]; |
297 _par_last_mark_stack_scan_times_ms = new double[_parallel_gc_threads]; | |
298 | |
299 _par_last_update_rs_times_ms = new double[_parallel_gc_threads]; | |
300 _par_last_update_rs_processed_buffers = new double[_parallel_gc_threads]; | |
301 | |
302 _par_last_scan_rs_times_ms = new double[_parallel_gc_threads]; | |
303 | |
304 _par_last_obj_copy_times_ms = new double[_parallel_gc_threads]; | |
305 | |
306 _par_last_termination_times_ms = new double[_parallel_gc_threads]; | |
1611 | 307 _par_last_termination_attempts = new double[_parallel_gc_threads]; |
308 _par_last_gc_worker_end_times_ms = new double[_parallel_gc_threads]; | |
2430 | 309 _par_last_gc_worker_times_ms = new double[_parallel_gc_threads]; |
342 | 310 |
311 // start conservatively | |
751 | 312 _expensive_region_limit_ms = 0.5 * (double) MaxGCPauseMillis; |
342 | 313 |
314 // <NEW PREDICTION> | |
315 | |
316 int index; | |
317 if (ParallelGCThreads == 0) | |
318 index = 0; | |
319 else if (ParallelGCThreads > 8) | |
320 index = 7; | |
321 else | |
322 index = ParallelGCThreads - 1; | |
323 | |
324 _pending_card_diff_seq->add(0.0); | |
325 _rs_length_diff_seq->add(rs_length_diff_defaults[index]); | |
326 _cost_per_card_ms_seq->add(cost_per_card_ms_defaults[index]); | |
327 _fully_young_cards_per_entry_ratio_seq->add( | |
328 fully_young_cards_per_entry_ratio_defaults[index]); | |
329 _cost_per_entry_ms_seq->add(cost_per_entry_ms_defaults[index]); | |
330 _cost_per_byte_ms_seq->add(cost_per_byte_ms_defaults[index]); | |
331 _constant_other_time_ms_seq->add(constant_other_time_ms_defaults[index]); | |
332 _young_other_cost_per_region_ms_seq->add( | |
333 young_other_cost_per_region_ms_defaults[index]); | |
334 _non_young_other_cost_per_region_ms_seq->add( | |
335 non_young_other_cost_per_region_ms_defaults[index]); | |
336 | |
337 // </NEW PREDICTION> | |
338 | |
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
|
339 // 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
|
340 // 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
|
341 // 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
|
342 // 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
|
343 // 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
|
344 // 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
|
345 // 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
|
346 // 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
|
347 // 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
|
348 |
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
|
349 // 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
|
350 // 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
|
351 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
|
352 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
|
353 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
|
354 "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
|
355 } |
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
|
356 } |
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
|
357 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
|
358 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
|
359 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
|
360 "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
|
361 } |
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
|
362 } |
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
|
363 |
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
|
364 // 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
|
365 // 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
|
366 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
|
367 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
|
368 // 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
|
369 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
|
370 } 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
|
371 // 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
|
372 // 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
|
373 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
|
374 "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
|
375 } |
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
|
376 } |
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
|
377 |
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
|
378 // 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
|
379 // 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
|
380 // 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
|
381 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
|
382 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
|
383 } |
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
|
384 |
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
|
385 // 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
|
386 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
|
387 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
|
388 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
|
389 "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
|
390 "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
|
391 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
|
392 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
|
393 } |
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
|
394 |
751 | 395 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
|
396 double time_slice = (double) GCPauseIntervalMillis / 1000.0; |
342 | 397 _mmu_tracker = new G1MMUTrackerQueue(time_slice, max_gc_time); |
751 | 398 _sigma = (double) G1ConfidencePercent / 100.0; |
342 | 399 |
400 // start conservatively (around 50ms is about right) | |
401 _concurrent_mark_remark_times_ms->add(0.05); | |
402 _concurrent_mark_cleanup_times_ms->add(0.20); | |
403 _tenuring_threshold = MaxTenuringThreshold; | |
3868
ae73da50be4b
7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents:
3867
diff
changeset
|
404 // _max_survivor_regions will be calculated by |
ae73da50be4b
7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents:
3867
diff
changeset
|
405 // calculate_young_list_target_length() during initialization. |
ae73da50be4b
7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents:
3867
diff
changeset
|
406 _max_survivor_regions = 0; |
545 | 407 |
1356 | 408 assert(GCTimeRatio > 0, |
409 "we should have set it to a default value set_g1_gc_flags() " | |
410 "if a user set it to 0"); | |
411 _gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio)); | |
412 | |
342 | 413 initialize_all(); |
414 } | |
415 | |
416 // Increment "i", mod "len" | |
417 static void inc_mod(int& i, int len) { | |
418 i++; if (i == len) i = 0; | |
419 } | |
420 | |
421 void G1CollectorPolicy::initialize_flags() { | |
422 set_min_alignment(HeapRegion::GrainBytes); | |
423 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
|
424 if (SurvivorRatio < 1) { |
1e458753107d
6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
apetrusenko
parents:
545
diff
changeset
|
425 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
|
426 } |
342 | 427 CollectorPolicy::initialize_flags(); |
428 } | |
429 | |
1285
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
430 // 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
|
431 // 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
|
432 // 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
|
433 // 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
|
434 // 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
|
435 // 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
|
436 class G1YoungGenSizer : public TwoGenerationCollectorPolicy { |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
437 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
|
438 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
|
439 } |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
440 |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
441 public: |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
442 G1YoungGenSizer() { |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
443 initialize_flags(); |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
444 initialize_size_info(); |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
445 } |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
446 |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
447 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
|
448 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
|
449 } |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
450 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
|
451 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
|
452 } |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
453 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
|
454 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
|
455 } |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
456 }; |
a1c410de27e4
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
1283
diff
changeset
|
457 |
342 | 458 void G1CollectorPolicy::init() { |
459 // Set aside an initial future to_space. | |
460 _g1 = G1CollectedHeap::heap(); | |
461 | |
462 assert(Heap_lock->owned_by_self(), "Locking discipline."); | |
463 | |
545 | 464 initialize_gc_policy_counters(); |
465 | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
466 G1YoungGenSizer sizer; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
467 size_t initial_region_num = sizer.initial_young_region_num(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
468 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
469 if (UseAdaptiveSizePolicy) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
470 set_adaptive_young_list_length(true); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
471 _young_list_fixed_length = 0; |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
472 } else { |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
473 set_adaptive_young_list_length(false); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
474 _young_list_fixed_length = initial_region_num; |
342 | 475 } |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
476 _free_regions_at_end_of_collection = _g1->free_regions(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
477 calculate_young_list_min_length(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
478 guarantee( _young_list_min_length == 0, "invariant, not enough info" ); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
479 calculate_young_list_target_length(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
480 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
481 // 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
|
482 // 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
|
483 start_incremental_cset_building(); |
342 | 484 } |
485 | |
545 | 486 // Create the jstat counters for the policy. |
487 void G1CollectorPolicy::initialize_gc_policy_counters() | |
488 { | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
489 _gc_policy_counters = new GCPolicyCounters("GarbageFirst", 1, 3); |
545 | 490 } |
491 | |
342 | 492 void G1CollectorPolicy::calculate_young_list_min_length() { |
493 _young_list_min_length = 0; | |
494 | |
495 if (!adaptive_young_list_length()) | |
496 return; | |
497 | |
498 if (_alloc_rate_ms_seq->num() > 3) { | |
499 double now_sec = os::elapsedTime(); | |
500 double when_ms = _mmu_tracker->when_max_gc_sec(now_sec) * 1000.0; | |
501 double alloc_rate_ms = predict_alloc_rate_ms(); | |
1973 | 502 size_t min_regions = (size_t) ceil(alloc_rate_ms * when_ms); |
503 size_t current_region_num = _g1->young_list()->length(); | |
342 | 504 _young_list_min_length = min_regions + current_region_num; |
505 } | |
506 } | |
507 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
508 void G1CollectorPolicy::calculate_young_list_target_length() { |
342 | 509 if (adaptive_young_list_length()) { |
510 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
|
511 calculate_young_list_target_length(rs_lengths); |
342 | 512 } else { |
513 if (full_young_gcs()) | |
514 _young_list_target_length = _young_list_fixed_length; | |
515 else | |
516 _young_list_target_length = _young_list_fixed_length / 2; | |
517 } | |
1973 | 518 |
519 // Make sure we allow the application to allocate at least one | |
520 // region before we need to do a collection again. | |
521 size_t min_length = _g1->young_list()->length() + 1; | |
522 _young_list_target_length = MAX2(_young_list_target_length, min_length); | |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
523 calculate_max_gc_locker_expansion(); |
545 | 524 calculate_survivors_policy(); |
342 | 525 } |
526 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
527 void G1CollectorPolicy::calculate_young_list_target_length(size_t rs_lengths) { |
342 | 528 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
|
529 guarantee( !_in_marking_window || !_last_full_young_gc, "invariant" ); |
342 | 530 |
531 double start_time_sec = os::elapsedTime(); | |
1282 | 532 size_t min_reserve_perc = MAX2((size_t)2, (size_t)G1ReservePercent); |
342 | 533 min_reserve_perc = MIN2((size_t) 50, min_reserve_perc); |
534 size_t reserve_regions = | |
535 (size_t) ((double) min_reserve_perc * (double) _g1->n_regions() / 100.0); | |
536 | |
537 if (full_young_gcs() && _free_regions_at_end_of_collection > 0) { | |
538 // we are in fully-young mode and there are free regions in the heap | |
539 | |
545 | 540 double survivor_regions_evac_time = |
541 predict_survivor_regions_evac_time(); | |
542 | |
342 | 543 double target_pause_time_ms = _mmu_tracker->max_gc_time() * 1000.0; |
544 size_t pending_cards = (size_t) get_new_prediction(_pending_cards_seq); | |
545 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
|
546 size_t scanned_cards = predict_young_card_num(adj_rs_lengths); |
545 | 547 double base_time_ms = predict_base_elapsed_time_ms(pending_cards, scanned_cards) |
548 + 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
|
549 |
342 | 550 // the result |
551 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
|
552 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
553 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
|
554 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
|
555 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
556 // 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
|
557 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
|
558 // 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
|
559 // 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
|
560 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
|
561 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
562 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
|
563 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
|
564 // 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
|
565 // 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
|
566 // 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
|
567 // 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
|
568 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
|
569 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
|
570 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
571 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
|
572 // 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
|
573 // 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
|
574 // 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
|
575 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
576 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
|
577 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
|
578 // 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
|
579 // 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
|
580 // 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
|
581 // 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
|
582 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
|
583 } else { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
584 // 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
|
585 // the target pause time so let's search.... |
342 | 586 |
587 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
|
588 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
|
589 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
590 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
|
591 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
|
592 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
|
593 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
594 // 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
|
595 // 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
|
596 // 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
|
597 // 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
|
598 // range [max..max+diff] |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
599 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
|
600 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
601 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
|
602 max_young_length = min_young_length + diff; |
342 | 603 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
604 // 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
|
605 // within the target pause time. |
342 | 606 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
607 assert(min_young_length <= abs_max_young_length, "just checking"); |
342 | 608 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
609 final_young_length = min_young_length; |
342 | 610 } |
611 } | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
612 // and we're done! |
342 | 613 |
614 // we should have at least one region in the target young length | |
545 | 615 _young_list_target_length = |
1973 | 616 final_young_length + _recorded_survivor_regions; |
342 | 617 |
618 // let's keep an eye of how long we spend on this calculation | |
619 // right now, I assume that we'll print it when we need it; we | |
620 // should really adde it to the breakdown of a pause | |
621 double end_time_sec = os::elapsedTime(); | |
622 double elapsed_time_ms = (end_time_sec - start_time_sec) * 1000.0; | |
623 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
624 #ifdef TRACE_CALC_YOUNG_LENGTH |
342 | 625 // 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
|
626 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
|
627 "elapsed %1.2lf ms, (%s%s) " SIZE_FORMAT SIZE_FORMAT, |
342 | 628 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
|
629 _young_list_target_length |
342 | 630 elapsed_time_ms, |
631 full_young_gcs() ? "full" : "partial", | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
632 during_initial_mark_pause() ? " i-m" : "", |
545 | 633 _in_marking_window, |
634 _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
|
635 #endif // TRACE_CALC_YOUNG_LENGTH |
342 | 636 |
637 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
|
638 // 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
|
639 // length dictates, we'll violate the pause spacing target (the |
342 | 640 // min length was calculate based on the application's current |
641 // alloc rate); | |
642 | |
643 // so, we have to bite the bullet, and allocate the minimum | |
644 // number. We'll violate our target, but we just can't meet it. | |
645 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
646 #ifdef TRACE_CALC_YOUNG_LENGTH |
342 | 647 // leave this in for debugging, just in case |
648 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
|
649 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
|
650 _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
|
651 #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
|
652 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
653 _young_list_target_length = _young_list_min_length; |
342 | 654 } |
655 } else { | |
656 // we are in a partially-young mode or we've run out of regions (due | |
657 // to evacuation failure) | |
658 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
659 #ifdef TRACE_CALC_YOUNG_LENGTH |
342 | 660 // leave this in for debugging, just in case |
661 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
|
662 _young_list_min_length); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
663 #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
|
664 // we'll do the pause as soon as possible by choosing the minimum |
1973 | 665 _young_list_target_length = _young_list_min_length; |
342 | 666 } |
667 | |
668 _rs_lengths_prediction = rs_lengths; | |
669 } | |
670 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
671 // 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
|
672 // returns true iff: |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
673 // 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
|
674 // the target pause time |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
675 // and: |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
676 // 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
|
677 // 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
|
678 // |
342 | 679 bool |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
680 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
|
681 double base_time_ms, |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
682 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
|
683 double target_pause_time_ms) { |
342 | 684 |
685 if (young_length >= init_free_regions) | |
686 // end condition 1: not enough space for the young regions | |
687 return false; | |
688 | |
689 double accum_surv_rate_adj = 0.0; | |
690 double accum_surv_rate = | |
691 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
|
692 |
342 | 693 size_t bytes_to_copy = |
694 (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
|
695 |
342 | 696 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
|
697 |
342 | 698 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
|
699 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
|
700 |
342 | 701 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
|
702 base_time_ms + copy_time_ms + young_other_time_ms; |
342 | 703 |
704 if (pause_time_ms > target_pause_time_ms) | |
705 // end condition 2: over the target pause time | |
706 return false; | |
707 | |
708 size_t free_bytes = | |
709 (init_free_regions - young_length) * HeapRegion::GrainBytes; | |
710 | |
711 if ((2.0 + sigma()) * (double) bytes_to_copy > (double) free_bytes) | |
712 // end condition 3: out of to-space (conservatively) | |
713 return false; | |
714 | |
715 // success! | |
716 return true; | |
717 } | |
718 | |
545 | 719 double G1CollectorPolicy::predict_survivor_regions_evac_time() { |
720 double survivor_regions_evac_time = 0.0; | |
721 for (HeapRegion * r = _recorded_survivor_head; | |
722 r != NULL && r != _recorded_survivor_tail->get_next_young_region(); | |
723 r = r->get_next_young_region()) { | |
724 survivor_regions_evac_time += predict_region_elapsed_time_ms(r, true); | |
725 } | |
726 return survivor_regions_evac_time; | |
727 } | |
728 | |
342 | 729 void G1CollectorPolicy::check_prediction_validity() { |
730 guarantee( adaptive_young_list_length(), "should not call this otherwise" ); | |
731 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
732 size_t rs_lengths = _g1->young_list()->sampled_rs_lengths(); |
342 | 733 if (rs_lengths > _rs_lengths_prediction) { |
734 // add 10% to avoid having to recalculate often | |
735 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
|
736 calculate_young_list_target_length(rs_lengths_prediction); |
342 | 737 } |
738 } | |
739 | |
740 HeapWord* G1CollectorPolicy::mem_allocate_work(size_t size, | |
741 bool is_tlab, | |
742 bool* gc_overhead_limit_was_exceeded) { | |
743 guarantee(false, "Not using this policy feature yet."); | |
744 return NULL; | |
745 } | |
746 | |
747 // This method controls how a collector handles one or more | |
748 // of its generations being fully allocated. | |
749 HeapWord* G1CollectorPolicy::satisfy_failed_allocation(size_t size, | |
750 bool is_tlab) { | |
751 guarantee(false, "Not using this policy feature yet."); | |
752 return NULL; | |
753 } | |
754 | |
755 | |
756 #ifndef PRODUCT | |
757 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
|
758 HeapRegion* head = _g1->young_list()->first_region(); |
342 | 759 return |
760 verify_young_ages(head, _short_lived_surv_rate_group); | |
761 // also call verify_young_ages on any additional surv rate groups | |
762 } | |
763 | |
764 bool | |
765 G1CollectorPolicy::verify_young_ages(HeapRegion* head, | |
766 SurvRateGroup *surv_rate_group) { | |
767 guarantee( surv_rate_group != NULL, "pre-condition" ); | |
768 | |
769 const char* name = surv_rate_group->name(); | |
770 bool ret = true; | |
771 int prev_age = -1; | |
772 | |
773 for (HeapRegion* curr = head; | |
774 curr != NULL; | |
775 curr = curr->get_next_young_region()) { | |
776 SurvRateGroup* group = curr->surv_rate_group(); | |
777 if (group == NULL && !curr->is_survivor()) { | |
778 gclog_or_tty->print_cr("## %s: encountered NULL surv_rate_group", name); | |
779 ret = false; | |
780 } | |
781 | |
782 if (surv_rate_group == group) { | |
783 int age = curr->age_in_surv_rate_group(); | |
784 | |
785 if (age < 0) { | |
786 gclog_or_tty->print_cr("## %s: encountered negative age", name); | |
787 ret = false; | |
788 } | |
789 | |
790 if (age <= prev_age) { | |
791 gclog_or_tty->print_cr("## %s: region ages are not strictly increasing " | |
792 "(%d, %d)", name, age, prev_age); | |
793 ret = false; | |
794 } | |
795 prev_age = age; | |
796 } | |
797 } | |
798 | |
799 return ret; | |
800 } | |
801 #endif // PRODUCT | |
802 | |
803 void G1CollectorPolicy::record_full_collection_start() { | |
804 _cur_collection_start_sec = os::elapsedTime(); | |
805 // Release the future to-space so that it is available for compaction into. | |
806 _g1->set_full_collection(); | |
807 } | |
808 | |
809 void G1CollectorPolicy::record_full_collection_end() { | |
810 // Consider this like a collection pause for the purposes of allocation | |
811 // since last pause. | |
812 double end_sec = os::elapsedTime(); | |
813 double full_gc_time_sec = end_sec - _cur_collection_start_sec; | |
814 double full_gc_time_ms = full_gc_time_sec * 1000.0; | |
815 | |
816 _all_full_gc_times_ms->add(full_gc_time_ms); | |
817 | |
595
3698e8f47799
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
547
diff
changeset
|
818 update_recent_gc_times(end_sec, full_gc_time_ms); |
342 | 819 |
820 _g1->clear_full_collection(); | |
821 | |
822 // "Nuke" the heuristics that control the fully/partially young GC | |
823 // transitions and make sure we start with fully young GCs after the | |
824 // Full GC. | |
825 set_full_young_gcs(true); | |
826 _last_full_young_gc = false; | |
827 _should_revert_to_full_young_gcs = false; | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
828 clear_initiate_conc_mark_if_possible(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
829 clear_during_initial_mark_pause(); |
342 | 830 _known_garbage_bytes = 0; |
831 _known_garbage_ratio = 0.0; | |
832 _in_marking_window = false; | |
833 _in_marking_window_im = false; | |
834 | |
835 _short_lived_surv_rate_group->start_adding_regions(); | |
836 // also call this on any additional surv rate groups | |
837 | |
545 | 838 record_survivor_regions(0, NULL, NULL); |
839 | |
342 | 840 _prev_region_num_young = _region_num_young; |
841 _prev_region_num_tenured = _region_num_tenured; | |
842 | |
843 _free_regions_at_end_of_collection = _g1->free_regions(); | |
545 | 844 // Reset survivors SurvRateGroup. |
845 _survivor_surv_rate_group->reset(); | |
342 | 846 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
|
847 calculate_young_list_target_length(); |
1973 | 848 } |
342 | 849 |
850 void G1CollectorPolicy::record_stop_world_start() { | |
851 _stop_world_start = os::elapsedTime(); | |
852 } | |
853 | |
854 void G1CollectorPolicy::record_collection_pause_start(double start_time_sec, | |
855 size_t start_used) { | |
856 if (PrintGCDetails) { | |
857 gclog_or_tty->stamp(PrintGCTimeStamps); | |
858 gclog_or_tty->print("[GC pause"); | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
859 gclog_or_tty->print(" (%s)", full_young_gcs() ? "young" : "partial"); |
342 | 860 } |
861 | |
1973 | 862 assert(_g1->used() == _g1->recalculate_used(), |
863 err_msg("sanity, used: "SIZE_FORMAT" recalculate_used: "SIZE_FORMAT, | |
864 _g1->used(), _g1->recalculate_used())); | |
342 | 865 |
866 double s_w_t_ms = (start_time_sec - _stop_world_start) * 1000.0; | |
867 _all_stop_world_times_ms->add(s_w_t_ms); | |
868 _stop_world_start = 0.0; | |
869 | |
870 _cur_collection_start_sec = start_time_sec; | |
871 _cur_collection_pause_used_at_start_bytes = start_used; | |
872 _cur_collection_pause_used_regions_at_start = _g1->used_regions(); | |
873 _pending_cards = _g1->pending_card_num(); | |
874 _max_pending_cards = _g1->max_pending_card_num(); | |
875 | |
876 _bytes_in_collection_set_before_gc = 0; | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
877 _bytes_copied_during_gc = 0; |
342 | 878 |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
879 YoungList* young_list = _g1->young_list(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
880 _eden_bytes_before_gc = young_list->eden_used_bytes(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
881 _survivor_bytes_before_gc = young_list->survivor_used_bytes(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
882 _capacity_before_gc = _g1->capacity(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
883 |
342 | 884 #ifdef DEBUG |
885 // initialise these to something well known so that we can spot | |
886 // if they are not set properly | |
887 | |
888 for (int i = 0; i < _parallel_gc_threads; ++i) { | |
1611 | 889 _par_last_gc_worker_start_times_ms[i] = -1234.0; |
890 _par_last_ext_root_scan_times_ms[i] = -1234.0; | |
891 _par_last_mark_stack_scan_times_ms[i] = -1234.0; | |
892 _par_last_update_rs_times_ms[i] = -1234.0; | |
893 _par_last_update_rs_processed_buffers[i] = -1234.0; | |
894 _par_last_scan_rs_times_ms[i] = -1234.0; | |
895 _par_last_obj_copy_times_ms[i] = -1234.0; | |
896 _par_last_termination_times_ms[i] = -1234.0; | |
897 _par_last_termination_attempts[i] = -1234.0; | |
898 _par_last_gc_worker_end_times_ms[i] = -1234.0; | |
2430 | 899 _par_last_gc_worker_times_ms[i] = -1234.0; |
342 | 900 } |
901 #endif | |
902 | |
903 for (int i = 0; i < _aux_num; ++i) { | |
904 _cur_aux_times_ms[i] = 0.0; | |
905 _cur_aux_times_set[i] = false; | |
906 } | |
907 | |
908 _satb_drain_time_set = false; | |
909 _last_satb_drain_processed_buffers = -1; | |
910 | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
911 _last_young_gc_full = false; |
342 | 912 |
913 // do that for any other surv rate groups | |
914 _short_lived_surv_rate_group->stop_adding_regions(); | |
1282 | 915 _survivors_age_table.clear(); |
545 | 916 |
342 | 917 assert( verify_young_ages(), "region age verification" ); |
918 } | |
919 | |
920 void G1CollectorPolicy::record_mark_closure_time(double mark_closure_time_ms) { | |
921 _mark_closure_time_ms = mark_closure_time_ms; | |
922 } | |
923 | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
924 void G1CollectorPolicy::record_concurrent_mark_init_end(double |
342 | 925 mark_init_elapsed_time_ms) { |
926 _during_marking = true; | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
927 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
|
928 clear_during_initial_mark_pause(); |
342 | 929 _cur_mark_stop_world_time_ms = mark_init_elapsed_time_ms; |
930 } | |
931 | |
932 void G1CollectorPolicy::record_concurrent_mark_remark_start() { | |
933 _mark_remark_start_sec = os::elapsedTime(); | |
934 _during_marking = false; | |
935 } | |
936 | |
937 void G1CollectorPolicy::record_concurrent_mark_remark_end() { | |
938 double end_time_sec = os::elapsedTime(); | |
939 double elapsed_time_ms = (end_time_sec - _mark_remark_start_sec)*1000.0; | |
940 _concurrent_mark_remark_times_ms->add(elapsed_time_ms); | |
941 _cur_mark_stop_world_time_ms += elapsed_time_ms; | |
942 _prev_collection_pause_end_ms += elapsed_time_ms; | |
943 | |
944 _mmu_tracker->add_pause(_mark_remark_start_sec, end_time_sec, true); | |
945 } | |
946 | |
947 void G1CollectorPolicy::record_concurrent_mark_cleanup_start() { | |
948 _mark_cleanup_start_sec = os::elapsedTime(); | |
949 } | |
950 | |
951 void | |
952 G1CollectorPolicy::record_concurrent_mark_cleanup_end(size_t freed_bytes, | |
953 size_t max_live_bytes) { | |
954 record_concurrent_mark_cleanup_end_work1(freed_bytes, max_live_bytes); | |
955 record_concurrent_mark_cleanup_end_work2(); | |
956 } | |
957 | |
958 void | |
959 G1CollectorPolicy:: | |
960 record_concurrent_mark_cleanup_end_work1(size_t freed_bytes, | |
961 size_t max_live_bytes) { | |
962 if (_n_marks < 2) _n_marks++; | |
963 if (G1PolicyVerbose > 0) | |
964 gclog_or_tty->print_cr("At end of marking, max_live is " SIZE_FORMAT " MB " | |
965 " (of " SIZE_FORMAT " MB heap).", | |
966 max_live_bytes/M, _g1->capacity()/M); | |
967 } | |
968 | |
969 // The important thing about this is that it includes "os::elapsedTime". | |
970 void G1CollectorPolicy::record_concurrent_mark_cleanup_end_work2() { | |
971 double end_time_sec = os::elapsedTime(); | |
972 double elapsed_time_ms = (end_time_sec - _mark_cleanup_start_sec)*1000.0; | |
973 _concurrent_mark_cleanup_times_ms->add(elapsed_time_ms); | |
974 _cur_mark_stop_world_time_ms += elapsed_time_ms; | |
975 _prev_collection_pause_end_ms += elapsed_time_ms; | |
976 | |
977 _mmu_tracker->add_pause(_mark_cleanup_start_sec, end_time_sec, true); | |
978 | |
979 _num_markings++; | |
980 | |
981 // We did a marking, so reset the "since_last_mark" variables. | |
982 double considerConcMarkCost = 1.0; | |
983 // If there are available processors, concurrent activity is free... | |
984 if (Threads::number_of_non_daemon_threads() * 2 < | |
985 os::active_processor_count()) { | |
986 considerConcMarkCost = 0.0; | |
987 } | |
988 _n_pauses_at_mark_end = _n_pauses; | |
989 _n_marks_since_last_pause++; | |
990 } | |
991 | |
992 void | |
993 G1CollectorPolicy::record_concurrent_mark_cleanup_completed() { | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
994 _should_revert_to_full_young_gcs = false; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
995 _last_full_young_gc = true; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
996 _in_marking_window = false; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
997 if (adaptive_young_list_length()) |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
998 calculate_young_list_target_length(); |
342 | 999 } |
1000 | |
1001 void G1CollectorPolicy::record_concurrent_pause() { | |
1002 if (_stop_world_start > 0.0) { | |
1003 double yield_ms = (os::elapsedTime() - _stop_world_start) * 1000.0; | |
1004 _all_yield_times_ms->add(yield_ms); | |
1005 } | |
1006 } | |
1007 | |
1008 void G1CollectorPolicy::record_concurrent_pause_end() { | |
1009 } | |
1010 | |
1011 template<class T> | |
1012 T sum_of(T* sum_arr, int start, int n, int N) { | |
1013 T sum = (T)0; | |
1014 for (int i = 0; i < n; i++) { | |
1015 int j = (start + i) % N; | |
1016 sum += sum_arr[j]; | |
1017 } | |
1018 return sum; | |
1019 } | |
1020 | |
1611 | 1021 void G1CollectorPolicy::print_par_stats(int level, |
1022 const char* str, | |
2430 | 1023 double* data) { |
342 | 1024 double min = data[0], max = data[0]; |
1025 double total = 0.0; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
1026 LineBuffer buf(level); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
1027 buf.append("[%s (ms):", str); |
342 | 1028 for (uint i = 0; i < ParallelGCThreads; ++i) { |
1029 double val = data[i]; | |
1030 if (val < min) | |
1031 min = val; | |
1032 if (val > max) | |
1033 max = val; | |
1034 total += val; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
1035 buf.append(" %3.1lf", val); |
342 | 1036 } |
2430 | 1037 buf.append_and_print_cr(""); |
1038 double avg = total / (double) ParallelGCThreads; | |
1039 buf.append_and_print_cr(" Avg: %5.1lf, Min: %5.1lf, Max: %5.1lf, Diff: %5.1lf]", | |
1040 avg, min, max, max - min); | |
342 | 1041 } |
1042 | |
1611 | 1043 void G1CollectorPolicy::print_par_sizes(int level, |
1044 const char* str, | |
2430 | 1045 double* data) { |
342 | 1046 double min = data[0], max = data[0]; |
1047 double total = 0.0; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
1048 LineBuffer buf(level); |
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
1049 buf.append("[%s :", str); |
342 | 1050 for (uint i = 0; i < ParallelGCThreads; ++i) { |
1051 double val = data[i]; | |
1052 if (val < min) | |
1053 min = val; | |
1054 if (val > max) | |
1055 max = val; | |
1056 total += val; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
1057 buf.append(" %d", (int) val); |
342 | 1058 } |
2430 | 1059 buf.append_and_print_cr(""); |
1060 double avg = total / (double) ParallelGCThreads; | |
1061 buf.append_and_print_cr(" Sum: %d, Avg: %d, Min: %d, Max: %d, Diff: %d]", | |
1062 (int)total, (int)avg, (int)min, (int)max, (int)max - (int)min); | |
342 | 1063 } |
1064 | |
1065 void G1CollectorPolicy::print_stats (int level, | |
1066 const char* str, | |
1067 double value) { | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
1068 LineBuffer(level).append_and_print_cr("[%s: %5.1lf ms]", str, value); |
342 | 1069 } |
1070 | |
1071 void G1CollectorPolicy::print_stats (int level, | |
1072 const char* str, | |
1073 int value) { | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
1074 LineBuffer(level).append_and_print_cr("[%s: %d]", str, value); |
342 | 1075 } |
1076 | |
1077 double G1CollectorPolicy::avg_value (double* data) { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
1078 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 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) { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
1089 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 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) { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
1101 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 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 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
1115 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 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 | |
1707 | 1128 void G1CollectorPolicy::record_collection_pause_end() { |
342 | 1129 double end_time_sec = os::elapsedTime(); |
1130 double elapsed_ms = _last_pause_time_ms; | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
1131 bool parallel = G1CollectedHeap::use_parallel_gc_threads(); |
342 | 1132 size_t rs_size = |
1133 _cur_collection_pause_used_regions_at_start - collection_set_size(); | |
1134 size_t cur_used_bytes = _g1->used(); | |
1135 assert(cur_used_bytes == _g1->recalculate_used(), "It should!"); | |
1136 bool last_pause_included_initial_mark = false; | |
1707 | 1137 bool update_stats = !_g1->evacuation_failed(); |
342 | 1138 |
1139 #ifndef PRODUCT | |
1140 if (G1YoungSurvRateVerbose) { | |
1141 gclog_or_tty->print_cr(""); | |
1142 _short_lived_surv_rate_group->print(); | |
1143 // do that for any other surv rate groups too | |
1144 } | |
1145 #endif // PRODUCT | |
1146 | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1147 last_pause_included_initial_mark = during_initial_mark_pause(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1148 if (last_pause_included_initial_mark) |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1149 record_concurrent_mark_init_end(0.0); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1150 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1151 size_t min_used_targ = |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1152 (_g1->capacity() / 100) * InitiatingHeapOccupancyPercent; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1153 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1154 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1155 if (!_g1->mark_in_progress() && !_last_full_young_gc) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1156 assert(!last_pause_included_initial_mark, "invariant"); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1157 if (cur_used_bytes > min_used_targ && |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1158 cur_used_bytes > _prev_collection_pause_used_at_end_bytes) { |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1159 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
|
1160 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1161 // 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
|
1162 // 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
|
1163 // 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
|
1164 set_initiate_conc_mark_if_possible(); |
342 | 1165 } |
1166 } | |
1167 | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1168 _prev_collection_pause_used_at_end_bytes = cur_used_bytes; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1169 |
342 | 1170 _mmu_tracker->add_pause(end_time_sec - elapsed_ms/1000.0, |
1171 end_time_sec, false); | |
1172 | |
1173 guarantee(_cur_collection_pause_used_regions_at_start >= | |
1174 collection_set_size(), | |
1175 "Negative RS size?"); | |
1176 | |
1177 // This assert is exempted when we're doing parallel collection pauses, | |
1178 // because the fragmentation caused by the parallel GC allocation buffers | |
1179 // can lead to more memory being used during collection than was used | |
1180 // before. Best leave this out until the fragmentation problem is fixed. | |
1181 // Pauses in which evacuation failed can also lead to negative | |
1182 // collections, since no space is reclaimed from a region containing an | |
1183 // object whose evacuation failed. | |
1184 // Further, we're now always doing parallel collection. But I'm still | |
1185 // leaving this here as a placeholder for a more precise assertion later. | |
1186 // (DLD, 10/05.) | |
1187 assert((true || parallel) // Always using GC LABs now. | |
1188 || _g1->evacuation_failed() | |
1189 || _cur_collection_pause_used_at_start_bytes >= cur_used_bytes, | |
1190 "Negative collection"); | |
1191 | |
1192 size_t freed_bytes = | |
1193 _cur_collection_pause_used_at_start_bytes - cur_used_bytes; | |
1194 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
|
1195 |
342 | 1196 double survival_fraction = |
1197 (double)surviving_bytes/ | |
1198 (double)_collection_set_bytes_used_before; | |
1199 | |
1200 _n_pauses++; | |
1201 | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1202 double ext_root_scan_time = avg_value(_par_last_ext_root_scan_times_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1203 double mark_stack_scan_time = avg_value(_par_last_mark_stack_scan_times_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1204 double update_rs_time = avg_value(_par_last_update_rs_times_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1205 double update_rs_processed_buffers = |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1206 sum_of_values(_par_last_update_rs_processed_buffers); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1207 double scan_rs_time = avg_value(_par_last_scan_rs_times_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1208 double obj_copy_time = avg_value(_par_last_obj_copy_times_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1209 double termination_time = avg_value(_par_last_termination_times_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1210 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1211 double parallel_known_time = update_rs_time + |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1212 ext_root_scan_time + |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1213 mark_stack_scan_time + |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1214 scan_rs_time + |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1215 obj_copy_time + |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1216 termination_time; |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1217 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1218 double parallel_other_time = _cur_collection_par_time_ms - parallel_known_time; |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1219 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1220 PauseSummary* summary = _summary; |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1221 |
595
3698e8f47799
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
547
diff
changeset
|
1222 if (update_stats) { |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1223 _recent_rs_scan_times_ms->add(scan_rs_time); |
342 | 1224 _recent_pause_times_ms->add(elapsed_ms); |
1225 _recent_rs_sizes->add(rs_size); | |
1226 | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1227 MainBodySummary* body_summary = summary->main_body_summary(); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1228 guarantee(body_summary != NULL, "should not be null!"); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1229 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1230 if (_satb_drain_time_set) |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1231 body_summary->record_satb_drain_time_ms(_cur_satb_drain_time_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1232 else |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1233 body_summary->record_satb_drain_time_ms(0.0); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1234 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1235 body_summary->record_ext_root_scan_time_ms(ext_root_scan_time); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1236 body_summary->record_mark_stack_scan_time_ms(mark_stack_scan_time); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1237 body_summary->record_update_rs_time_ms(update_rs_time); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1238 body_summary->record_scan_rs_time_ms(scan_rs_time); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1239 body_summary->record_obj_copy_time_ms(obj_copy_time); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1240 if (parallel) { |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1241 body_summary->record_parallel_time_ms(_cur_collection_par_time_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1242 body_summary->record_clear_ct_time_ms(_cur_clear_ct_time_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1243 body_summary->record_termination_time_ms(termination_time); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1244 body_summary->record_parallel_other_time_ms(parallel_other_time); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1245 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1246 body_summary->record_mark_closure_time_ms(_mark_closure_time_ms); |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1247 |
342 | 1248 // We exempt parallel collection from this check because Alloc Buffer |
1249 // fragmentation can produce negative collections. Same with evac | |
1250 // failure. | |
1251 // Further, we're now always doing parallel collection. But I'm still | |
1252 // leaving this here as a placeholder for a more precise assertion later. | |
1253 // (DLD, 10/05. | |
1254 assert((true || parallel) | |
1255 || _g1->evacuation_failed() | |
1256 || surviving_bytes <= _collection_set_bytes_used_before, | |
1257 "Or else negative collection!"); | |
1258 _recent_CS_bytes_used_before->add(_collection_set_bytes_used_before); | |
1259 _recent_CS_bytes_surviving->add(surviving_bytes); | |
1260 | |
1261 // this is where we update the allocation rate of the application | |
1262 double app_time_ms = | |
1263 (_cur_collection_start_sec * 1000.0 - _prev_collection_pause_end_ms); | |
1264 if (app_time_ms < MIN_TIMER_GRANULARITY) { | |
1265 // This usually happens due to the timer not having the required | |
1266 // granularity. Some Linuxes are the usual culprits. | |
1267 // We'll just set it to something (arbitrarily) small. | |
1268 app_time_ms = 1.0; | |
1269 } | |
1270 size_t regions_allocated = | |
1271 (_region_num_young - _prev_region_num_young) + | |
1272 (_region_num_tenured - _prev_region_num_tenured); | |
1273 double alloc_rate_ms = (double) regions_allocated / app_time_ms; | |
1274 _alloc_rate_ms_seq->add(alloc_rate_ms); | |
1275 _prev_region_num_young = _region_num_young; | |
1276 _prev_region_num_tenured = _region_num_tenured; | |
1277 | |
1278 double interval_ms = | |
1279 (end_time_sec - _recent_prev_end_times_for_all_gcs_sec->oldest()) * 1000.0; | |
1280 update_recent_gc_times(end_time_sec, elapsed_ms); | |
1281 _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
|
1282 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
|
1283 (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
|
1284 #ifndef PRODUCT |
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1285 // 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
|
1286 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
|
1287 gclog_or_tty->print_cr("-------------------------------------------"); |
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1288 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
|
1289 _recent_gc_times_ms->dump(); |
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1290 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
|
1291 _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
|
1292 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
|
1293 _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
|
1294 // 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
|
1295 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
|
1296 #endif // !PRODUCT |
23b9a8d315fc
6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents:
1086
diff
changeset
|
1297 // 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
|
1298 // 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
|
1299 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
|
1300 _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
|
1301 } else { |
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1302 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
|
1303 _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
|
1304 } |
89f1b9ae8991
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
1043
diff
changeset
|
1305 } |
342 | 1306 } |
1307 | |
1308 if (G1PolicyVerbose > 1) { | |
1309 gclog_or_tty->print_cr(" Recording collection pause(%d)", _n_pauses); | |
1310 } | |
1311 | |
1312 if (G1PolicyVerbose > 1) { | |
1313 gclog_or_tty->print_cr(" ET: %10.6f ms (avg: %10.6f ms)\n" | |
1314 " ET-RS: %10.6f ms (avg: %10.6f ms)\n" | |
1315 " |RS|: " SIZE_FORMAT, | |
1316 elapsed_ms, recent_avg_time_for_pauses_ms(), | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1317 scan_rs_time, recent_avg_time_for_rs_scan_ms(), |
342 | 1318 rs_size); |
1319 | |
1320 gclog_or_tty->print_cr(" Used at start: " SIZE_FORMAT"K" | |
1321 " At end " SIZE_FORMAT "K\n" | |
1322 " garbage : " SIZE_FORMAT "K" | |
1323 " of " SIZE_FORMAT "K\n" | |
1324 " survival : %6.2f%% (%6.2f%% avg)", | |
1325 _cur_collection_pause_used_at_start_bytes/K, | |
1326 _g1->used()/K, freed_bytes/K, | |
1327 _collection_set_bytes_used_before/K, | |
1328 survival_fraction*100.0, | |
1329 recent_avg_survival_fraction()*100.0); | |
1330 gclog_or_tty->print_cr(" Recent %% gc pause time: %6.2f", | |
1331 recent_avg_pause_time_ratio() * 100.0); | |
1332 } | |
1333 | |
1334 double other_time_ms = elapsed_ms; | |
1335 | |
1707 | 1336 if (_satb_drain_time_set) { |
1337 other_time_ms -= _cur_satb_drain_time_ms; | |
1338 } | |
1339 | |
1340 if (parallel) { | |
1341 other_time_ms -= _cur_collection_par_time_ms + _cur_clear_ct_time_ms; | |
1342 } else { | |
1343 other_time_ms -= | |
1344 update_rs_time + | |
1345 ext_root_scan_time + mark_stack_scan_time + | |
1346 scan_rs_time + obj_copy_time; | |
342 | 1347 } |
1348 | |
1349 if (PrintGCDetails) { | |
1707 | 1350 gclog_or_tty->print_cr("%s, %1.8lf secs]", |
342 | 1351 (last_pause_included_initial_mark) ? " (initial-mark)" : "", |
1352 elapsed_ms / 1000.0); | |
1353 | |
1707 | 1354 if (_satb_drain_time_set) { |
1355 print_stats(1, "SATB Drain Time", _cur_satb_drain_time_ms); | |
1356 } | |
1357 if (_last_satb_drain_processed_buffers >= 0) { | |
1358 print_stats(2, "Processed Buffers", _last_satb_drain_processed_buffers); | |
1359 } | |
1360 if (parallel) { | |
1361 print_stats(1, "Parallel Time", _cur_collection_par_time_ms); | |
2430 | 1362 print_par_stats(2, "GC Worker Start Time", _par_last_gc_worker_start_times_ms); |
1707 | 1363 print_par_stats(2, "Update RS", _par_last_update_rs_times_ms); |
2430 | 1364 print_par_sizes(3, "Processed Buffers", _par_last_update_rs_processed_buffers); |
1365 print_par_stats(2, "Ext Root Scanning", _par_last_ext_root_scan_times_ms); | |
1366 print_par_stats(2, "Mark Stack Scanning", _par_last_mark_stack_scan_times_ms); | |
1707 | 1367 print_par_stats(2, "Scan RS", _par_last_scan_rs_times_ms); |
1368 print_par_stats(2, "Object Copy", _par_last_obj_copy_times_ms); | |
1369 print_par_stats(2, "Termination", _par_last_termination_times_ms); | |
2430 | 1370 print_par_sizes(3, "Termination Attempts", _par_last_termination_attempts); |
1371 print_par_stats(2, "GC Worker End Time", _par_last_gc_worker_end_times_ms); | |
1372 | |
1373 for (int i = 0; i < _parallel_gc_threads; i++) { | |
1374 _par_last_gc_worker_times_ms[i] = _par_last_gc_worker_end_times_ms[i] - _par_last_gc_worker_start_times_ms[i]; | |
1375 } | |
1376 print_par_stats(2, "GC Worker Times", _par_last_gc_worker_times_ms); | |
1377 | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1378 print_stats(2, "Parallel Other", parallel_other_time); |
1707 | 1379 print_stats(1, "Clear CT", _cur_clear_ct_time_ms); |
1380 } else { | |
1381 print_stats(1, "Update RS", update_rs_time); | |
1382 print_stats(2, "Processed Buffers", | |
1383 (int)update_rs_processed_buffers); | |
1384 print_stats(1, "Ext Root Scanning", ext_root_scan_time); | |
1385 print_stats(1, "Mark Stack Scanning", mark_stack_scan_time); | |
1386 print_stats(1, "Scan RS", scan_rs_time); | |
1387 print_stats(1, "Object Copying", obj_copy_time); | |
342 | 1388 } |
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1389 #ifndef PRODUCT |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1390 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
|
1391 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
|
1392 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
|
1393 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
|
1394 if (_num_cc_clears > 0) { |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1395 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
|
1396 } |
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
845
diff
changeset
|
1397 #endif |
342 | 1398 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
|
1399 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
|
1400 |
342 | 1401 for (int i = 0; i < _aux_num; ++i) { |
1402 if (_cur_aux_times_set[i]) { | |
1403 char buffer[96]; | |
1404 sprintf(buffer, "Aux%d", i); | |
1405 print_stats(1, buffer, _cur_aux_times_ms[i]); | |
1406 } | |
1407 } | |
1408 } | |
1409 | |
1410 _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
|
1411 if (update_stats) { |
2314b7336582
6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents:
640
diff
changeset
|
1412 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
|
1413 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
|
1414 } |
342 | 1415 for (int i = 0; i < _aux_num; ++i) |
1416 if (_cur_aux_times_set[i]) | |
1417 _all_aux_times_ms[i].add(_cur_aux_times_ms[i]); | |
1418 | |
1419 // Reset marks-between-pauses counter. | |
1420 _n_marks_since_last_pause = 0; | |
1421 | |
1422 // Update the efficiency-since-mark vars. | |
1423 double proc_ms = elapsed_ms * (double) _parallel_gc_threads; | |
1424 if (elapsed_ms < MIN_TIMER_GRANULARITY) { | |
1425 // This usually happens due to the timer not having the required | |
1426 // granularity. Some Linuxes are the usual culprits. | |
1427 // We'll just set it to something (arbitrarily) small. | |
1428 proc_ms = 1.0; | |
1429 } | |
1430 double cur_efficiency = (double) freed_bytes / proc_ms; | |
1431 | |
1432 bool new_in_marking_window = _in_marking_window; | |
1433 bool new_in_marking_window_im = false; | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
1434 if (during_initial_mark_pause()) { |
342 | 1435 new_in_marking_window = true; |
1436 new_in_marking_window_im = true; | |
1437 } | |
1438 | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1439 if (_last_full_young_gc) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1440 set_full_young_gcs(false); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1441 _last_full_young_gc = false; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1442 } |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1443 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1444 if ( !_last_young_gc_full ) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1445 if ( _should_revert_to_full_young_gcs || |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1446 _known_garbage_ratio < 0.05 || |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1447 (adaptive_young_list_length() && |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1448 (get_gc_eff_factor() * cur_efficiency < predict_young_gc_eff())) ) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1449 set_full_young_gcs(true); |
342 | 1450 } |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1451 } |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1452 _should_revert_to_full_young_gcs = false; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1453 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1454 if (_last_young_gc_full && !_during_marking) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1455 _young_gc_eff_seq->add(cur_efficiency); |
342 | 1456 } |
1457 | |
1458 _short_lived_surv_rate_group->start_adding_regions(); | |
1459 // do that for any other surv rate groupsx | |
1460 | |
1461 // <NEW PREDICTION> | |
1462 | |
677 | 1463 if (update_stats) { |
342 | 1464 double pause_time_ms = elapsed_ms; |
1465 | |
1466 size_t diff = 0; | |
1467 if (_max_pending_cards >= _pending_cards) | |
1468 diff = _max_pending_cards - _pending_cards; | |
1469 _pending_card_diff_seq->add((double) diff); | |
1470 | |
1471 double cost_per_card_ms = 0.0; | |
1472 if (_pending_cards > 0) { | |
1473 cost_per_card_ms = update_rs_time / (double) _pending_cards; | |
1474 _cost_per_card_ms_seq->add(cost_per_card_ms); | |
1475 } | |
1476 | |
1477 size_t cards_scanned = _g1->cards_scanned(); | |
1478 | |
1479 double cost_per_entry_ms = 0.0; | |
1480 if (cards_scanned > 10) { | |
1481 cost_per_entry_ms = scan_rs_time / (double) cards_scanned; | |
1482 if (_last_young_gc_full) | |
1483 _cost_per_entry_ms_seq->add(cost_per_entry_ms); | |
1484 else | |
1485 _partially_young_cost_per_entry_ms_seq->add(cost_per_entry_ms); | |
1486 } | |
1487 | |
1488 if (_max_rs_lengths > 0) { | |
1489 double cards_per_entry_ratio = | |
1490 (double) cards_scanned / (double) _max_rs_lengths; | |
1491 if (_last_young_gc_full) | |
1492 _fully_young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio); | |
1493 else | |
1494 _partially_young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio); | |
1495 } | |
1496 | |
1497 size_t rs_length_diff = _max_rs_lengths - _recorded_rs_lengths; | |
1498 if (rs_length_diff >= 0) | |
1499 _rs_length_diff_seq->add((double) rs_length_diff); | |
1500 | |
1501 size_t copied_bytes = surviving_bytes; | |
1502 double cost_per_byte_ms = 0.0; | |
1503 if (copied_bytes > 0) { | |
1504 cost_per_byte_ms = obj_copy_time / (double) copied_bytes; | |
1505 if (_in_marking_window) | |
1506 _cost_per_byte_ms_during_cm_seq->add(cost_per_byte_ms); | |
1507 else | |
1508 _cost_per_byte_ms_seq->add(cost_per_byte_ms); | |
1509 } | |
1510 | |
1511 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
|
1512 (update_rs_time + scan_rs_time + obj_copy_time + |
342 | 1513 _mark_closure_time_ms + termination_time); |
1514 | |
1515 double young_other_time_ms = 0.0; | |
1516 if (_recorded_young_regions > 0) { | |
1517 young_other_time_ms = | |
1518 _recorded_young_cset_choice_time_ms + | |
1519 _recorded_young_free_cset_time_ms; | |
1520 _young_other_cost_per_region_ms_seq->add(young_other_time_ms / | |
1521 (double) _recorded_young_regions); | |
1522 } | |
1523 double non_young_other_time_ms = 0.0; | |
1524 if (_recorded_non_young_regions > 0) { | |
1525 non_young_other_time_ms = | |
1526 _recorded_non_young_cset_choice_time_ms + | |
1527 _recorded_non_young_free_cset_time_ms; | |
1528 | |
1529 _non_young_other_cost_per_region_ms_seq->add(non_young_other_time_ms / | |
1530 (double) _recorded_non_young_regions); | |
1531 } | |
1532 | |
1533 double constant_other_time_ms = all_other_time_ms - | |
1534 (young_other_time_ms + non_young_other_time_ms); | |
1535 _constant_other_time_ms_seq->add(constant_other_time_ms); | |
1536 | |
1537 double survival_ratio = 0.0; | |
1538 if (_bytes_in_collection_set_before_gc > 0) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
1539 survival_ratio = (double) _bytes_copied_during_gc / |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
1540 (double) _bytes_in_collection_set_before_gc; |
342 | 1541 } |
1542 | |
1543 _pending_cards_seq->add((double) _pending_cards); | |
1544 _scanned_cards_seq->add((double) cards_scanned); | |
1545 _rs_lengths_seq->add((double) _max_rs_lengths); | |
1546 | |
1547 double expensive_region_limit_ms = | |
751 | 1548 (double) MaxGCPauseMillis - predict_constant_other_time_ms(); |
342 | 1549 if (expensive_region_limit_ms < 0.0) { |
1550 // this means that the other time was predicted to be longer than | |
1551 // than the max pause time | |
751 | 1552 expensive_region_limit_ms = (double) MaxGCPauseMillis; |
342 | 1553 } |
1554 _expensive_region_limit_ms = expensive_region_limit_ms; | |
1555 | |
1556 if (PREDICTIONS_VERBOSE) { | |
1557 gclog_or_tty->print_cr(""); | |
1558 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
|
1559 "REGIONS %d %d %d " |
342 | 1560 "PENDING_CARDS %d %d " |
1561 "CARDS_SCANNED %d %d " | |
1562 "RS_LENGTHS %d %d " | |
1563 "RS_UPDATE %1.6lf %1.6lf RS_SCAN %1.6lf %1.6lf " | |
1564 "SURVIVAL_RATIO %1.6lf %1.6lf " | |
1565 "OBJECT_COPY %1.6lf %1.6lf OTHER_CONSTANT %1.6lf %1.6lf " | |
1566 "OTHER_YOUNG %1.6lf %1.6lf " | |
1567 "OTHER_NON_YOUNG %1.6lf %1.6lf " | |
1568 "VTIME_DIFF %1.6lf TERMINATION %1.6lf " | |
1569 "ELAPSED %1.6lf %1.6lf ", | |
1570 _cur_collection_start_sec, | |
1571 (!_last_young_gc_full) ? 2 : | |
1572 (last_pause_included_initial_mark) ? 1 : 0, | |
1573 _recorded_region_num, | |
1574 _recorded_young_regions, | |
1575 _recorded_non_young_regions, | |
1576 _predicted_pending_cards, _pending_cards, | |
1577 _predicted_cards_scanned, cards_scanned, | |
1578 _predicted_rs_lengths, _max_rs_lengths, | |
1579 _predicted_rs_update_time_ms, update_rs_time, | |
1580 _predicted_rs_scan_time_ms, scan_rs_time, | |
1581 _predicted_survival_ratio, survival_ratio, | |
1582 _predicted_object_copy_time_ms, obj_copy_time, | |
1583 _predicted_constant_other_time_ms, constant_other_time_ms, | |
1584 _predicted_young_other_time_ms, young_other_time_ms, | |
1585 _predicted_non_young_other_time_ms, | |
1586 non_young_other_time_ms, | |
1587 _vtime_diff_ms, termination_time, | |
1588 _predicted_pause_time_ms, elapsed_ms); | |
1589 } | |
1590 | |
1591 if (G1PolicyVerbose > 0) { | |
1592 gclog_or_tty->print_cr("Pause Time, predicted: %1.4lfms (predicted %s), actual: %1.4lfms", | |
1593 _predicted_pause_time_ms, | |
1594 (_within_target) ? "within" : "outside", | |
1595 elapsed_ms); | |
1596 } | |
1597 | |
1598 } | |
1599 | |
1600 _in_marking_window = new_in_marking_window; | |
1601 _in_marking_window_im = new_in_marking_window_im; | |
1602 _free_regions_at_end_of_collection = _g1->free_regions(); | |
1603 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
|
1604 calculate_young_list_target_length(); |
342 | 1605 |
1111 | 1606 // Note that _mmu_tracker->max_gc_time() returns the time in seconds. |
1282 | 1607 double update_rs_time_goal_ms = _mmu_tracker->max_gc_time() * MILLIUNITS * G1RSetUpdatingPauseTimePercent / 100.0; |
1111 | 1608 adjust_concurrent_refinement(update_rs_time, update_rs_processed_buffers, update_rs_time_goal_ms); |
342 | 1609 // </NEW PREDICTION> |
1610 } | |
1611 | |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1612 #define EXT_SIZE_FORMAT "%d%s" |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1613 #define EXT_SIZE_PARAMS(bytes) \ |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1614 byte_size_in_proper_unit((bytes)), \ |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1615 proper_unit_for_byte_size((bytes)) |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1616 |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1617 void G1CollectorPolicy::print_heap_transition() { |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1618 if (PrintGCDetails) { |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1619 YoungList* young_list = _g1->young_list(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1620 size_t eden_bytes = young_list->eden_used_bytes(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1621 size_t survivor_bytes = young_list->survivor_used_bytes(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1622 size_t used_before_gc = _cur_collection_pause_used_at_start_bytes; |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1623 size_t used = _g1->used(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1624 size_t capacity = _g1->capacity(); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1625 |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1626 gclog_or_tty->print_cr( |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1627 " [Eden: "EXT_SIZE_FORMAT"->"EXT_SIZE_FORMAT" " |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1628 "Survivors: "EXT_SIZE_FORMAT"->"EXT_SIZE_FORMAT" " |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1629 "Heap: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->" |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1630 EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")]", |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1631 EXT_SIZE_PARAMS(_eden_bytes_before_gc), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1632 EXT_SIZE_PARAMS(eden_bytes), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1633 EXT_SIZE_PARAMS(_survivor_bytes_before_gc), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1634 EXT_SIZE_PARAMS(survivor_bytes), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1635 EXT_SIZE_PARAMS(used_before_gc), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1636 EXT_SIZE_PARAMS(_capacity_before_gc), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1637 EXT_SIZE_PARAMS(used), |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1638 EXT_SIZE_PARAMS(capacity)); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1639 } else if (PrintGC) { |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1640 _g1->print_size_transition(gclog_or_tty, |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1641 _cur_collection_pause_used_at_start_bytes, |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1642 _g1->used(), _g1->capacity()); |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1643 } |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1644 } |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
1645 |
342 | 1646 // <NEW PREDICTION> |
1647 | |
1111 | 1648 void G1CollectorPolicy::adjust_concurrent_refinement(double update_rs_time, |
1649 double update_rs_processed_buffers, | |
1650 double goal_ms) { | |
1651 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
1652 ConcurrentG1Refine *cg1r = G1CollectedHeap::heap()->concurrent_g1_refine(); | |
1653 | |
1282 | 1654 if (G1UseAdaptiveConcRefinement) { |
1111 | 1655 const int k_gy = 3, k_gr = 6; |
1656 const double inc_k = 1.1, dec_k = 0.9; | |
1657 | |
1658 int g = cg1r->green_zone(); | |
1659 if (update_rs_time > goal_ms) { | |
1660 g = (int)(g * dec_k); // Can become 0, that's OK. That would mean a mutator-only processing. | |
1661 } else { | |
1662 if (update_rs_time < goal_ms && update_rs_processed_buffers > g) { | |
1663 g = (int)MAX2(g * inc_k, g + 1.0); | |
1664 } | |
1665 } | |
1666 // Change the refinement threads params | |
1667 cg1r->set_green_zone(g); | |
1668 cg1r->set_yellow_zone(g * k_gy); | |
1669 cg1r->set_red_zone(g * k_gr); | |
1670 cg1r->reinitialize_threads(); | |
1671 | |
1672 int processing_threshold_delta = MAX2((int)(cg1r->green_zone() * sigma()), 1); | |
1673 int processing_threshold = MIN2(cg1r->green_zone() + processing_threshold_delta, | |
1674 cg1r->yellow_zone()); | |
1675 // Change the barrier params | |
1676 dcqs.set_process_completed_threshold(processing_threshold); | |
1677 dcqs.set_max_completed_queue(cg1r->red_zone()); | |
1678 } | |
1679 | |
1680 int curr_queue_size = dcqs.completed_buffers_num(); | |
1681 if (curr_queue_size >= cg1r->yellow_zone()) { | |
1682 dcqs.set_completed_queue_padding(curr_queue_size); | |
1683 } else { | |
1684 dcqs.set_completed_queue_padding(0); | |
1685 } | |
1686 dcqs.notify_if_necessary(); | |
1687 } | |
1688 | |
342 | 1689 double |
1690 G1CollectorPolicy:: | |
1691 predict_young_collection_elapsed_time_ms(size_t adjustment) { | |
1692 guarantee( adjustment == 0 || adjustment == 1, "invariant" ); | |
1693 | |
1694 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
|
1695 size_t young_num = g1h->young_list()->length(); |
342 | 1696 if (young_num == 0) |
1697 return 0.0; | |
1698 | |
1699 young_num += adjustment; | |
1700 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
|
1701 size_t rs_lengths = g1h->young_list()->sampled_rs_lengths() + |
342 | 1702 predict_rs_length_diff(); |
1703 size_t card_num; | |
1704 if (full_young_gcs()) | |
1705 card_num = predict_young_card_num(rs_lengths); | |
1706 else | |
1707 card_num = predict_non_young_card_num(rs_lengths); | |
1708 size_t young_byte_size = young_num * HeapRegion::GrainBytes; | |
1709 double accum_yg_surv_rate = | |
1710 _short_lived_surv_rate_group->accum_surv_rate(adjustment); | |
1711 | |
1712 size_t bytes_to_copy = | |
1713 (size_t) (accum_yg_surv_rate * (double) HeapRegion::GrainBytes); | |
1714 | |
1715 return | |
1716 predict_rs_update_time_ms(pending_cards) + | |
1717 predict_rs_scan_time_ms(card_num) + | |
1718 predict_object_copy_time_ms(bytes_to_copy) + | |
1719 predict_young_other_time_ms(young_num) + | |
1720 predict_constant_other_time_ms(); | |
1721 } | |
1722 | |
1723 double | |
1724 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards) { | |
1725 size_t rs_length = predict_rs_length_diff(); | |
1726 size_t card_num; | |
1727 if (full_young_gcs()) | |
1728 card_num = predict_young_card_num(rs_length); | |
1729 else | |
1730 card_num = predict_non_young_card_num(rs_length); | |
1731 return predict_base_elapsed_time_ms(pending_cards, card_num); | |
1732 } | |
1733 | |
1734 double | |
1735 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards, | |
1736 size_t scanned_cards) { | |
1737 return | |
1738 predict_rs_update_time_ms(pending_cards) + | |
1739 predict_rs_scan_time_ms(scanned_cards) + | |
1740 predict_constant_other_time_ms(); | |
1741 } | |
1742 | |
1743 double | |
1744 G1CollectorPolicy::predict_region_elapsed_time_ms(HeapRegion* hr, | |
1745 bool young) { | |
1746 size_t rs_length = hr->rem_set()->occupied(); | |
1747 size_t card_num; | |
1748 if (full_young_gcs()) | |
1749 card_num = predict_young_card_num(rs_length); | |
1750 else | |
1751 card_num = predict_non_young_card_num(rs_length); | |
1752 size_t bytes_to_copy = predict_bytes_to_copy(hr); | |
1753 | |
1754 double region_elapsed_time_ms = | |
1755 predict_rs_scan_time_ms(card_num) + | |
1756 predict_object_copy_time_ms(bytes_to_copy); | |
1757 | |
1758 if (young) | |
1759 region_elapsed_time_ms += predict_young_other_time_ms(1); | |
1760 else | |
1761 region_elapsed_time_ms += predict_non_young_other_time_ms(1); | |
1762 | |
1763 return region_elapsed_time_ms; | |
1764 } | |
1765 | |
1766 size_t | |
1767 G1CollectorPolicy::predict_bytes_to_copy(HeapRegion* hr) { | |
1768 size_t bytes_to_copy; | |
1769 if (hr->is_marked()) | |
1770 bytes_to_copy = hr->max_live_bytes(); | |
1771 else { | |
1772 guarantee( hr->is_young() && hr->age_in_surv_rate_group() != -1, | |
1773 "invariant" ); | |
1774 int age = hr->age_in_surv_rate_group(); | |
545 | 1775 double yg_surv_rate = predict_yg_surv_rate(age, hr->surv_rate_group()); |
342 | 1776 bytes_to_copy = (size_t) ((double) hr->used() * yg_surv_rate); |
1777 } | |
1778 | |
1779 return bytes_to_copy; | |
1780 } | |
1781 | |
1782 void | |
1783 G1CollectorPolicy::start_recording_regions() { | |
1784 _recorded_rs_lengths = 0; | |
1785 _recorded_young_regions = 0; | |
1786 _recorded_non_young_regions = 0; | |
1787 | |
1788 #if PREDICTIONS_VERBOSE | |
1789 _recorded_marked_bytes = 0; | |
1790 _recorded_young_bytes = 0; | |
1791 _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
|
1792 _predicted_rs_lengths = 0; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1793 _predicted_cards_scanned = 0; |
342 | 1794 #endif // PREDICTIONS_VERBOSE |
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_cset_region_info(HeapRegion* hr, bool young) { |
342 | 1799 #if PREDICTIONS_VERBOSE |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1800 if (!young) { |
342 | 1801 _recorded_marked_bytes += hr->max_live_bytes(); |
1802 } | |
1803 _predicted_bytes_to_copy += predict_bytes_to_copy(hr); | |
1804 #endif // PREDICTIONS_VERBOSE | |
1805 | |
1806 size_t rs_length = hr->rem_set()->occupied(); | |
1807 _recorded_rs_lengths += rs_length; | |
1808 } | |
1809 | |
1810 void | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1811 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
|
1812 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
|
1813 ++_recorded_non_young_regions; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1814 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
|
1815 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1816 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1817 void |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1818 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
|
1819 _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
|
1820 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1821 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1822 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
|
1823 #if PREDICTIONS_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1824 _recorded_young_bytes = bytes; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1825 #endif // PREDICTIONS_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1826 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1827 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1828 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
|
1829 _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
|
1830 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1831 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1832 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
|
1833 _predicted_bytes_to_copy = bytes; |
342 | 1834 } |
1835 | |
1836 void | |
1837 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
|
1838 // 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
|
1839 // 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
|
1840 _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
|
1841 |
342 | 1842 #if PREDICTIONS_VERBOSE |
1843 _predicted_pending_cards = predict_pending_cards(); | |
1844 _predicted_rs_lengths = _recorded_rs_lengths + predict_rs_length_diff(); | |
1845 if (full_young_gcs()) | |
1846 _predicted_cards_scanned += predict_young_card_num(_predicted_rs_lengths); | |
1847 else | |
1848 _predicted_cards_scanned += | |
1849 predict_non_young_card_num(_predicted_rs_lengths); | |
1850 _recorded_region_num = _recorded_young_regions + _recorded_non_young_regions; | |
1851 | |
1852 _predicted_rs_update_time_ms = | |
1853 predict_rs_update_time_ms(_g1->pending_card_num()); | |
1854 _predicted_rs_scan_time_ms = | |
1855 predict_rs_scan_time_ms(_predicted_cards_scanned); | |
1856 _predicted_object_copy_time_ms = | |
1857 predict_object_copy_time_ms(_predicted_bytes_to_copy); | |
1858 _predicted_constant_other_time_ms = | |
1859 predict_constant_other_time_ms(); | |
1860 _predicted_young_other_time_ms = | |
1861 predict_young_other_time_ms(_recorded_young_regions); | |
1862 _predicted_non_young_other_time_ms = | |
1863 predict_non_young_other_time_ms(_recorded_non_young_regions); | |
1864 | |
1865 _predicted_pause_time_ms = | |
1866 _predicted_rs_update_time_ms + | |
1867 _predicted_rs_scan_time_ms + | |
1868 _predicted_object_copy_time_ms + | |
1869 _predicted_constant_other_time_ms + | |
1870 _predicted_young_other_time_ms + | |
1871 _predicted_non_young_other_time_ms; | |
1872 #endif // PREDICTIONS_VERBOSE | |
1873 } | |
1874 | |
1875 void G1CollectorPolicy::check_if_region_is_too_expensive(double | |
1876 predicted_time_ms) { | |
1877 // I don't think we need to do this when in young GC mode since | |
1878 // marking will be initiated next time we hit the soft limit anyway... | |
1879 if (predicted_time_ms > _expensive_region_limit_ms) { | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1880 // no point in doing another partial one |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
1881 _should_revert_to_full_young_gcs = true; |
342 | 1882 } |
1883 } | |
1884 | |
1885 // </NEW PREDICTION> | |
1886 | |
1887 | |
1888 void G1CollectorPolicy::update_recent_gc_times(double end_time_sec, | |
1889 double elapsed_ms) { | |
1890 _recent_gc_times_ms->add(elapsed_ms); | |
1891 _recent_prev_end_times_for_all_gcs_sec->add(end_time_sec); | |
1892 _prev_collection_pause_end_ms = end_time_sec * 1000.0; | |
1893 } | |
1894 | |
1895 double G1CollectorPolicy::recent_avg_time_for_pauses_ms() { | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1896 if (_recent_pause_times_ms->num() == 0) { |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1897 return (double) MaxGCPauseMillis; |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1898 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1899 return _recent_pause_times_ms->avg(); |
342 | 1900 } |
1901 | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1902 double G1CollectorPolicy::recent_avg_time_for_rs_scan_ms() { |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1903 if (_recent_rs_scan_times_ms->num() == 0) { |
751 | 1904 return (double)MaxGCPauseMillis/3.0; |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1905 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1906 return _recent_rs_scan_times_ms->avg(); |
342 | 1907 } |
1908 | |
1909 int G1CollectorPolicy::number_of_recent_gcs() { | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1910 assert(_recent_rs_scan_times_ms->num() == |
342 | 1911 _recent_pause_times_ms->num(), "Sequence out of sync"); |
1912 assert(_recent_pause_times_ms->num() == | |
1913 _recent_CS_bytes_used_before->num(), "Sequence out of sync"); | |
1914 assert(_recent_CS_bytes_used_before->num() == | |
1915 _recent_CS_bytes_surviving->num(), "Sequence out of sync"); | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
1916 |
342 | 1917 return _recent_pause_times_ms->num(); |
1918 } | |
1919 | |
1920 double G1CollectorPolicy::recent_avg_survival_fraction() { | |
1921 return recent_avg_survival_fraction_work(_recent_CS_bytes_surviving, | |
1922 _recent_CS_bytes_used_before); | |
1923 } | |
1924 | |
1925 double G1CollectorPolicy::last_survival_fraction() { | |
1926 return last_survival_fraction_work(_recent_CS_bytes_surviving, | |
1927 _recent_CS_bytes_used_before); | |
1928 } | |
1929 | |
1930 double | |
1931 G1CollectorPolicy::recent_avg_survival_fraction_work(TruncatedSeq* surviving, | |
1932 TruncatedSeq* before) { | |
1933 assert(surviving->num() == before->num(), "Sequence out of sync"); | |
1934 if (before->sum() > 0.0) { | |
1935 double recent_survival_rate = surviving->sum() / before->sum(); | |
1936 // We exempt parallel collection from this check because Alloc Buffer | |
1937 // fragmentation can produce negative collections. | |
1938 // Further, we're now always doing parallel collection. But I'm still | |
1939 // leaving this here as a placeholder for a more precise assertion later. | |
1940 // (DLD, 10/05.) | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
1941 assert((true || G1CollectedHeap::use_parallel_gc_threads()) || |
342 | 1942 _g1->evacuation_failed() || |
1943 recent_survival_rate <= 1.0, "Or bad frac"); | |
1944 return recent_survival_rate; | |
1945 } else { | |
1946 return 1.0; // Be conservative. | |
1947 } | |
1948 } | |
1949 | |
1950 double | |
1951 G1CollectorPolicy::last_survival_fraction_work(TruncatedSeq* surviving, | |
1952 TruncatedSeq* before) { | |
1953 assert(surviving->num() == before->num(), "Sequence out of sync"); | |
1954 if (surviving->num() > 0 && before->last() > 0.0) { | |
1955 double last_survival_rate = surviving->last() / before->last(); | |
1956 // We exempt parallel collection from this check because Alloc Buffer | |
1957 // fragmentation can produce negative collections. | |
1958 // Further, we're now always doing parallel collection. But I'm still | |
1959 // leaving this here as a placeholder for a more precise assertion later. | |
1960 // (DLD, 10/05.) | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
1961 assert((true || G1CollectedHeap::use_parallel_gc_threads()) || |
342 | 1962 last_survival_rate <= 1.0, "Or bad frac"); |
1963 return last_survival_rate; | |
1964 } else { | |
1965 return 1.0; | |
1966 } | |
1967 } | |
1968 | |
1969 static const int survival_min_obs = 5; | |
1970 static double survival_min_obs_limits[] = { 0.9, 0.7, 0.5, 0.3, 0.1 }; | |
1971 static const double min_survival_rate = 0.1; | |
1972 | |
1973 double | |
1974 G1CollectorPolicy::conservative_avg_survival_fraction_work(double avg, | |
1975 double latest) { | |
1976 double res = avg; | |
1977 if (number_of_recent_gcs() < survival_min_obs) { | |
1978 res = MAX2(res, survival_min_obs_limits[number_of_recent_gcs()]); | |
1979 } | |
1980 res = MAX2(res, latest); | |
1981 res = MAX2(res, min_survival_rate); | |
1982 // In the parallel case, LAB fragmentation can produce "negative | |
1983 // collections"; so can evac failure. Cap at 1.0 | |
1984 res = MIN2(res, 1.0); | |
1985 return res; | |
1986 } | |
1987 | |
1988 size_t G1CollectorPolicy::expansion_amount() { | |
1356 | 1989 if ((recent_avg_pause_time_ratio() * 100.0) > _gc_overhead_perc) { |
751 | 1990 // We will double the existing space, or take |
1991 // G1ExpandByPercentOfAvailable % of the available expansion | |
1992 // space, whichever is smaller, bounded below by a minimum | |
1993 // expansion (unless that's all that's left.) | |
342 | 1994 const size_t min_expand_bytes = 1*M; |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2152
diff
changeset
|
1995 size_t reserved_bytes = _g1->max_capacity(); |
342 | 1996 size_t committed_bytes = _g1->capacity(); |
1997 size_t uncommitted_bytes = reserved_bytes - committed_bytes; | |
1998 size_t expand_bytes; | |
1999 size_t expand_bytes_via_pct = | |
751 | 2000 uncommitted_bytes * G1ExpandByPercentOfAvailable / 100; |
342 | 2001 expand_bytes = MIN2(expand_bytes_via_pct, committed_bytes); |
2002 expand_bytes = MAX2(expand_bytes, min_expand_bytes); | |
2003 expand_bytes = MIN2(expand_bytes, uncommitted_bytes); | |
2004 if (G1PolicyVerbose > 1) { | |
2005 gclog_or_tty->print("Decided to expand: ratio = %5.2f, " | |
2006 "committed = %d%s, uncommited = %d%s, via pct = %d%s.\n" | |
2007 " Answer = %d.\n", | |
2008 recent_avg_pause_time_ratio(), | |
2009 byte_size_in_proper_unit(committed_bytes), | |
2010 proper_unit_for_byte_size(committed_bytes), | |
2011 byte_size_in_proper_unit(uncommitted_bytes), | |
2012 proper_unit_for_byte_size(uncommitted_bytes), | |
2013 byte_size_in_proper_unit(expand_bytes_via_pct), | |
2014 proper_unit_for_byte_size(expand_bytes_via_pct), | |
2015 byte_size_in_proper_unit(expand_bytes), | |
2016 proper_unit_for_byte_size(expand_bytes)); | |
2017 } | |
2018 return expand_bytes; | |
2019 } else { | |
2020 return 0; | |
2021 } | |
2022 } | |
2023 | |
2024 void G1CollectorPolicy::note_start_of_mark_thread() { | |
2025 _mark_thread_startup_sec = os::elapsedTime(); | |
2026 } | |
2027 | |
2028 class CountCSClosure: public HeapRegionClosure { | |
2029 G1CollectorPolicy* _g1_policy; | |
2030 public: | |
2031 CountCSClosure(G1CollectorPolicy* g1_policy) : | |
2032 _g1_policy(g1_policy) {} | |
2033 bool doHeapRegion(HeapRegion* r) { | |
2034 _g1_policy->_bytes_in_collection_set_before_gc += r->used(); | |
2035 return false; | |
2036 } | |
2037 }; | |
2038 | |
2039 void G1CollectorPolicy::count_CS_bytes_used() { | |
2040 CountCSClosure cs_closure(this); | |
2041 _g1->collection_set_iterate(&cs_closure); | |
2042 } | |
2043 | |
2044 void G1CollectorPolicy::print_summary (int level, | |
2045 const char* str, | |
2046 NumberSeq* seq) const { | |
2047 double sum = seq->sum(); | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2048 LineBuffer(level + 1).append_and_print_cr("%-24s = %8.2lf s (avg = %8.2lf ms)", |
342 | 2049 str, sum / 1000.0, seq->avg()); |
2050 } | |
2051 | |
2052 void G1CollectorPolicy::print_summary_sd (int level, | |
2053 const char* str, | |
2054 NumberSeq* seq) const { | |
2055 print_summary(level, str, seq); | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2056 LineBuffer(level + 6).append_and_print_cr("(num = %5d, std dev = %8.2lf ms, max = %8.2lf ms)", |
342 | 2057 seq->num(), seq->sd(), seq->maximum()); |
2058 } | |
2059 | |
2060 void G1CollectorPolicy::check_other_times(int level, | |
2061 NumberSeq* other_times_ms, | |
2062 NumberSeq* calc_other_times_ms) const { | |
2063 bool should_print = false; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2064 LineBuffer buf(level + 2); |
342 | 2065 |
2066 double max_sum = MAX2(fabs(other_times_ms->sum()), | |
2067 fabs(calc_other_times_ms->sum())); | |
2068 double min_sum = MIN2(fabs(other_times_ms->sum()), | |
2069 fabs(calc_other_times_ms->sum())); | |
2070 double sum_ratio = max_sum / min_sum; | |
2071 if (sum_ratio > 1.1) { | |
2072 should_print = true; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2073 buf.append_and_print_cr("## CALCULATED OTHER SUM DOESN'T MATCH RECORDED ###"); |
342 | 2074 } |
2075 | |
2076 double max_avg = MAX2(fabs(other_times_ms->avg()), | |
2077 fabs(calc_other_times_ms->avg())); | |
2078 double min_avg = MIN2(fabs(other_times_ms->avg()), | |
2079 fabs(calc_other_times_ms->avg())); | |
2080 double avg_ratio = max_avg / min_avg; | |
2081 if (avg_ratio > 1.1) { | |
2082 should_print = true; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2083 buf.append_and_print_cr("## CALCULATED OTHER AVG DOESN'T MATCH RECORDED ###"); |
342 | 2084 } |
2085 | |
2086 if (other_times_ms->sum() < -0.01) { | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2087 buf.append_and_print_cr("## RECORDED OTHER SUM IS NEGATIVE ###"); |
342 | 2088 } |
2089 | |
2090 if (other_times_ms->avg() < -0.01) { | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2091 buf.append_and_print_cr("## RECORDED OTHER AVG IS NEGATIVE ###"); |
342 | 2092 } |
2093 | |
2094 if (calc_other_times_ms->sum() < -0.01) { | |
2095 should_print = true; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2096 buf.append_and_print_cr("## CALCULATED OTHER SUM IS NEGATIVE ###"); |
342 | 2097 } |
2098 | |
2099 if (calc_other_times_ms->avg() < -0.01) { | |
2100 should_print = true; | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2101 buf.append_and_print_cr("## CALCULATED OTHER AVG IS NEGATIVE ###"); |
342 | 2102 } |
2103 | |
2104 if (should_print) | |
2105 print_summary(level, "Other(Calc)", calc_other_times_ms); | |
2106 } | |
2107 | |
2108 void G1CollectorPolicy::print_summary(PauseSummary* summary) const { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
2109 bool parallel = G1CollectedHeap::use_parallel_gc_threads(); |
342 | 2110 MainBodySummary* body_summary = summary->main_body_summary(); |
2111 if (summary->get_total_seq()->num() > 0) { | |
677 | 2112 print_summary_sd(0, "Evacuation Pauses", summary->get_total_seq()); |
342 | 2113 if (body_summary != NULL) { |
2114 print_summary(1, "SATB Drain", body_summary->get_satb_drain_seq()); | |
2115 if (parallel) { | |
2116 print_summary(1, "Parallel Time", body_summary->get_parallel_seq()); | |
2117 print_summary(2, "Update RS", body_summary->get_update_rs_seq()); | |
2118 print_summary(2, "Ext Root Scanning", | |
2119 body_summary->get_ext_root_scan_seq()); | |
2120 print_summary(2, "Mark Stack Scanning", | |
2121 body_summary->get_mark_stack_scan_seq()); | |
2122 print_summary(2, "Scan RS", body_summary->get_scan_rs_seq()); | |
2123 print_summary(2, "Object Copy", body_summary->get_obj_copy_seq()); | |
2124 print_summary(2, "Termination", body_summary->get_termination_seq()); | |
2125 print_summary(2, "Other", body_summary->get_parallel_other_seq()); | |
2126 { | |
2127 NumberSeq* other_parts[] = { | |
2128 body_summary->get_update_rs_seq(), | |
2129 body_summary->get_ext_root_scan_seq(), | |
2130 body_summary->get_mark_stack_scan_seq(), | |
2131 body_summary->get_scan_rs_seq(), | |
2132 body_summary->get_obj_copy_seq(), | |
2133 body_summary->get_termination_seq() | |
2134 }; | |
2135 NumberSeq calc_other_times_ms(body_summary->get_parallel_seq(), | |
1779 | 2136 6, other_parts); |
342 | 2137 check_other_times(2, body_summary->get_parallel_other_seq(), |
2138 &calc_other_times_ms); | |
2139 } | |
2140 print_summary(1, "Mark Closure", body_summary->get_mark_closure_seq()); | |
2141 print_summary(1, "Clear CT", body_summary->get_clear_ct_seq()); | |
2142 } else { | |
2143 print_summary(1, "Update RS", body_summary->get_update_rs_seq()); | |
2144 print_summary(1, "Ext Root Scanning", | |
2145 body_summary->get_ext_root_scan_seq()); | |
2146 print_summary(1, "Mark Stack Scanning", | |
2147 body_summary->get_mark_stack_scan_seq()); | |
2148 print_summary(1, "Scan RS", body_summary->get_scan_rs_seq()); | |
2149 print_summary(1, "Object Copy", body_summary->get_obj_copy_seq()); | |
2150 } | |
2151 } | |
2152 print_summary(1, "Other", summary->get_other_seq()); | |
2153 { | |
1779 | 2154 if (body_summary != NULL) { |
2155 NumberSeq calc_other_times_ms; | |
2156 if (parallel) { | |
2157 // parallel | |
2158 NumberSeq* other_parts[] = { | |
2159 body_summary->get_satb_drain_seq(), | |
2160 body_summary->get_parallel_seq(), | |
2161 body_summary->get_clear_ct_seq() | |
2162 }; | |
2163 calc_other_times_ms = NumberSeq(summary->get_total_seq(), | |
2164 3, other_parts); | |
2165 } else { | |
2166 // serial | |
2167 NumberSeq* other_parts[] = { | |
2168 body_summary->get_satb_drain_seq(), | |
2169 body_summary->get_update_rs_seq(), | |
2170 body_summary->get_ext_root_scan_seq(), | |
2171 body_summary->get_mark_stack_scan_seq(), | |
2172 body_summary->get_scan_rs_seq(), | |
2173 body_summary->get_obj_copy_seq() | |
2174 }; | |
2175 calc_other_times_ms = NumberSeq(summary->get_total_seq(), | |
2176 6, other_parts); | |
2177 } | |
2178 check_other_times(1, summary->get_other_seq(), &calc_other_times_ms); | |
342 | 2179 } |
2180 } | |
2181 } else { | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2182 LineBuffer(1).append_and_print_cr("none"); |
342 | 2183 } |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2184 LineBuffer(0).append_and_print_cr(""); |
342 | 2185 } |
2186 | |
2187 void G1CollectorPolicy::print_tracing_info() const { | |
2188 if (TraceGen0Time) { | |
2189 gclog_or_tty->print_cr("ALL PAUSES"); | |
2190 print_summary_sd(0, "Total", _all_pause_times_ms); | |
2191 gclog_or_tty->print_cr(""); | |
2192 gclog_or_tty->print_cr(""); | |
2193 gclog_or_tty->print_cr(" Full Young GC Pauses: %8d", _full_young_pause_num); | |
2194 gclog_or_tty->print_cr(" Partial Young GC Pauses: %8d", _partial_young_pause_num); | |
2195 gclog_or_tty->print_cr(""); | |
2196 | |
677 | 2197 gclog_or_tty->print_cr("EVACUATION PAUSES"); |
2198 print_summary(_summary); | |
342 | 2199 |
2200 gclog_or_tty->print_cr("MISC"); | |
2201 print_summary_sd(0, "Stop World", _all_stop_world_times_ms); | |
2202 print_summary_sd(0, "Yields", _all_yield_times_ms); | |
2203 for (int i = 0; i < _aux_num; ++i) { | |
2204 if (_all_aux_times_ms[i].num() > 0) { | |
2205 char buffer[96]; | |
2206 sprintf(buffer, "Aux%d", i); | |
2207 print_summary_sd(0, buffer, &_all_aux_times_ms[i]); | |
2208 } | |
2209 } | |
2210 | |
2211 size_t all_region_num = _region_num_young + _region_num_tenured; | |
2212 gclog_or_tty->print_cr(" New Regions %8d, Young %8d (%6.2lf%%), " | |
2213 "Tenured %8d (%6.2lf%%)", | |
2214 all_region_num, | |
2215 _region_num_young, | |
2216 (double) _region_num_young / (double) all_region_num * 100.0, | |
2217 _region_num_tenured, | |
2218 (double) _region_num_tenured / (double) all_region_num * 100.0); | |
2219 } | |
2220 if (TraceGen1Time) { | |
2221 if (_all_full_gc_times_ms->num() > 0) { | |
2222 gclog_or_tty->print("\n%4d full_gcs: total time = %8.2f s", | |
2223 _all_full_gc_times_ms->num(), | |
2224 _all_full_gc_times_ms->sum() / 1000.0); | |
2225 gclog_or_tty->print_cr(" (avg = %8.2fms).", _all_full_gc_times_ms->avg()); | |
2226 gclog_or_tty->print_cr(" [std. dev = %8.2f ms, max = %8.2f ms]", | |
2227 _all_full_gc_times_ms->sd(), | |
2228 _all_full_gc_times_ms->maximum()); | |
2229 } | |
2230 } | |
2231 } | |
2232 | |
2233 void G1CollectorPolicy::print_yg_surv_rate_info() const { | |
2234 #ifndef PRODUCT | |
2235 _short_lived_surv_rate_group->print_surv_rate_summary(); | |
2236 // add this call for any other surv rate groups | |
2237 #endif // PRODUCT | |
2238 } | |
2239 | |
1973 | 2240 void |
2241 G1CollectorPolicy::update_region_num(bool young) { | |
2242 if (young) { | |
342 | 2243 ++_region_num_young; |
2244 } else { | |
2245 ++_region_num_tenured; | |
2246 } | |
2247 } | |
2248 | |
2249 #ifndef PRODUCT | |
2250 // for debugging, bit of a hack... | |
2251 static char* | |
2252 region_num_to_mbs(int length) { | |
2253 static char buffer[64]; | |
2254 double bytes = (double) (length * HeapRegion::GrainBytes); | |
2255 double mbs = bytes / (double) (1024 * 1024); | |
2256 sprintf(buffer, "%7.2lfMB", mbs); | |
2257 return buffer; | |
2258 } | |
2259 #endif // PRODUCT | |
2260 | |
545 | 2261 size_t G1CollectorPolicy::max_regions(int purpose) { |
342 | 2262 switch (purpose) { |
2263 case GCAllocForSurvived: | |
545 | 2264 return _max_survivor_regions; |
342 | 2265 case GCAllocForTenured: |
545 | 2266 return REGIONS_UNLIMITED; |
342 | 2267 default: |
545 | 2268 ShouldNotReachHere(); |
2269 return REGIONS_UNLIMITED; | |
342 | 2270 }; |
2271 } | |
2272 | |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2273 void G1CollectorPolicy::calculate_max_gc_locker_expansion() { |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2274 size_t expansion_region_num = 0; |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2275 if (GCLockerEdenExpansionPercent > 0) { |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2276 double perc = (double) GCLockerEdenExpansionPercent / 100.0; |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2277 double expansion_region_num_d = perc * (double) _young_list_target_length; |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2278 // We use ceiling so that if expansion_region_num_d is > 0.0 (but |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2279 // less than 1.0) we'll get 1. |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2280 expansion_region_num = (size_t) ceil(expansion_region_num_d); |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2281 } else { |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2282 assert(expansion_region_num == 0, "sanity"); |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2283 } |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2284 _young_list_max_length = _young_list_target_length + expansion_region_num; |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2285 assert(_young_list_target_length <= _young_list_max_length, "post-condition"); |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2286 } |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
2287 |
545 | 2288 // Calculates survivor space parameters. |
2289 void G1CollectorPolicy::calculate_survivors_policy() | |
2290 { | |
3868
ae73da50be4b
7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents:
3867
diff
changeset
|
2291 _max_survivor_regions = _young_list_target_length / SurvivorRatio; |
ae73da50be4b
7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents:
3867
diff
changeset
|
2292 _tenuring_threshold = _survivors_age_table.compute_tenuring_threshold( |
545 | 2293 HeapRegion::GrainWords * _max_survivor_regions); |
2294 } | |
2295 | |
342 | 2296 #ifndef PRODUCT |
2297 class HRSortIndexIsOKClosure: public HeapRegionClosure { | |
2298 CollectionSetChooser* _chooser; | |
2299 public: | |
2300 HRSortIndexIsOKClosure(CollectionSetChooser* chooser) : | |
2301 _chooser(chooser) {} | |
2302 | |
2303 bool doHeapRegion(HeapRegion* r) { | |
2304 if (!r->continuesHumongous()) { | |
2305 assert(_chooser->regionProperlyOrdered(r), "Ought to be."); | |
2306 } | |
2307 return false; | |
2308 } | |
2309 }; | |
2310 | |
2311 bool G1CollectorPolicy_BestRegionsFirst::assertMarkedBytesDataOK() { | |
2312 HRSortIndexIsOKClosure cl(_collectionSetChooser); | |
2313 _g1->heap_region_iterate(&cl); | |
2314 return true; | |
2315 } | |
2316 #endif | |
2317 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2318 bool |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2319 G1CollectorPolicy::force_initial_mark_if_outside_cycle() { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2320 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2321 if (!during_cycle) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2322 set_initiate_conc_mark_if_possible(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2323 return true; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2324 } else { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2325 return false; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2326 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2327 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2328 |
342 | 2329 void |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2330 G1CollectorPolicy::decide_on_conc_mark_initiation() { |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2331 // 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
|
2332 // initial-mark pause. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2333 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2334 // 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
|
2335 // 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
|
2336 // 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
|
2337 // initial-mark pause). |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2338 assert(!during_initial_mark_pause(), "pre-condition"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2339 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2340 if (initiate_conc_mark_if_possible()) { |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2341 // 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
|
2342 // 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
|
2343 // concurrent marking cycle. So we might initiate one. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2344 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2345 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2346 if (!during_cycle) { |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2347 // 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
|
2348 // 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
|
2349 // initiate a new cycle. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2350 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2351 set_during_initial_mark_pause(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2352 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2353 // 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
|
2354 // we've already acted on it. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2355 clear_initiate_conc_mark_if_possible(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2356 } else { |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2357 // The concurrent marking thread is still finishing up the |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2358 // 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
|
2359 // overlap. In particular, the concurrent marking thread might |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2360 // 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
|
2361 // 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
|
2362 // 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
|
2363 // 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
|
2364 // 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
|
2365 // periodically yields while clearing the next marking bitmap |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2366 // 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
|
2367 // 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
|
2368 // let the concurrent marking thread complete the last one. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2369 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2370 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2371 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2372 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
2373 void |
342 | 2374 G1CollectorPolicy_BestRegionsFirst:: |
2375 record_collection_pause_start(double start_time_sec, size_t start_used) { | |
2376 G1CollectorPolicy::record_collection_pause_start(start_time_sec, start_used); | |
2377 } | |
2378 | |
2379 class KnownGarbageClosure: public HeapRegionClosure { | |
2380 CollectionSetChooser* _hrSorted; | |
2381 | |
2382 public: | |
2383 KnownGarbageClosure(CollectionSetChooser* hrSorted) : | |
2384 _hrSorted(hrSorted) | |
2385 {} | |
2386 | |
2387 bool doHeapRegion(HeapRegion* r) { | |
2388 // We only include humongous regions in collection | |
2389 // sets when concurrent mark shows that their contained object is | |
2390 // unreachable. | |
2391 | |
2392 // Do we have any marking information for this region? | |
2393 if (r->is_marked()) { | |
2394 // We don't include humongous regions in collection | |
2395 // sets because we collect them immediately at the end of a marking | |
2396 // cycle. We also don't include young regions because we *must* | |
2397 // include them in the next collection pause. | |
2398 if (!r->isHumongous() && !r->is_young()) { | |
2399 _hrSorted->addMarkedHeapRegion(r); | |
2400 } | |
2401 } | |
2402 return false; | |
2403 } | |
2404 }; | |
2405 | |
2406 class ParKnownGarbageHRClosure: public HeapRegionClosure { | |
2407 CollectionSetChooser* _hrSorted; | |
2408 jint _marked_regions_added; | |
2409 jint _chunk_size; | |
2410 jint _cur_chunk_idx; | |
2411 jint _cur_chunk_end; // Cur chunk [_cur_chunk_idx, _cur_chunk_end) | |
2412 int _worker; | |
2413 int _invokes; | |
2414 | |
2415 void get_new_chunk() { | |
2416 _cur_chunk_idx = _hrSorted->getParMarkedHeapRegionChunk(_chunk_size); | |
2417 _cur_chunk_end = _cur_chunk_idx + _chunk_size; | |
2418 } | |
2419 void add_region(HeapRegion* r) { | |
2420 if (_cur_chunk_idx == _cur_chunk_end) { | |
2421 get_new_chunk(); | |
2422 } | |
2423 assert(_cur_chunk_idx < _cur_chunk_end, "postcondition"); | |
2424 _hrSorted->setMarkedHeapRegion(_cur_chunk_idx, r); | |
2425 _marked_regions_added++; | |
2426 _cur_chunk_idx++; | |
2427 } | |
2428 | |
2429 public: | |
2430 ParKnownGarbageHRClosure(CollectionSetChooser* hrSorted, | |
2431 jint chunk_size, | |
2432 int worker) : | |
2433 _hrSorted(hrSorted), _chunk_size(chunk_size), _worker(worker), | |
2434 _marked_regions_added(0), _cur_chunk_idx(0), _cur_chunk_end(0), | |
2435 _invokes(0) | |
2436 {} | |
2437 | |
2438 bool doHeapRegion(HeapRegion* r) { | |
2439 // We only include humongous regions in collection | |
2440 // sets when concurrent mark shows that their contained object is | |
2441 // unreachable. | |
2442 _invokes++; | |
2443 | |
2444 // Do we have any marking information for this region? | |
2445 if (r->is_marked()) { | |
2446 // We don't include humongous regions in collection | |
2447 // sets because we collect them immediately at the end of a marking | |
2448 // cycle. | |
2449 // We also do not include young regions in collection sets | |
2450 if (!r->isHumongous() && !r->is_young()) { | |
2451 add_region(r); | |
2452 } | |
2453 } | |
2454 return false; | |
2455 } | |
2456 jint marked_regions_added() { return _marked_regions_added; } | |
2457 int invokes() { return _invokes; } | |
2458 }; | |
2459 | |
2460 class ParKnownGarbageTask: public AbstractGangTask { | |
2461 CollectionSetChooser* _hrSorted; | |
2462 jint _chunk_size; | |
2463 G1CollectedHeap* _g1; | |
2464 public: | |
2465 ParKnownGarbageTask(CollectionSetChooser* hrSorted, jint chunk_size) : | |
2466 AbstractGangTask("ParKnownGarbageTask"), | |
2467 _hrSorted(hrSorted), _chunk_size(chunk_size), | |
2468 _g1(G1CollectedHeap::heap()) | |
2469 {} | |
2470 | |
2471 void work(int i) { | |
2472 ParKnownGarbageHRClosure parKnownGarbageCl(_hrSorted, _chunk_size, i); | |
2473 // Back to zero for the claim value. | |
355 | 2474 _g1->heap_region_par_iterate_chunked(&parKnownGarbageCl, i, |
2475 HeapRegion::InitialClaimValue); | |
342 | 2476 jint regions_added = parKnownGarbageCl.marked_regions_added(); |
2477 _hrSorted->incNumMarkedHeapRegions(regions_added); | |
2478 if (G1PrintParCleanupStats) { | |
2363
c93aa6caa02f
7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents:
2188
diff
changeset
|
2479 gclog_or_tty->print_cr(" Thread %d called %d times, added %d regions to list.", |
342 | 2480 i, parKnownGarbageCl.invokes(), regions_added); |
2481 } | |
2482 } | |
2483 }; | |
2484 | |
2485 void | |
2486 G1CollectorPolicy_BestRegionsFirst:: | |
2487 record_concurrent_mark_cleanup_end(size_t freed_bytes, | |
2488 size_t max_live_bytes) { | |
2489 double start; | |
2490 if (G1PrintParCleanupStats) start = os::elapsedTime(); | |
2491 record_concurrent_mark_cleanup_end_work1(freed_bytes, max_live_bytes); | |
2492 | |
2493 _collectionSetChooser->clearMarkedHeapRegions(); | |
2494 double clear_marked_end; | |
2495 if (G1PrintParCleanupStats) { | |
2496 clear_marked_end = os::elapsedTime(); | |
2497 gclog_or_tty->print_cr(" clear marked regions + work1: %8.3f ms.", | |
2498 (clear_marked_end - start)*1000.0); | |
2499 } | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1779
diff
changeset
|
2500 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 2501 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
|
2502 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
|
2503 const size_t WorkUnit = |
342 | 2504 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
|
2505 MinWorkUnit); |
342 | 2506 _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
|
2507 WorkUnit); |
342 | 2508 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
|
2509 (int) WorkUnit); |
342 | 2510 _g1->workers()->run_task(&parKnownGarbageTask); |
355 | 2511 |
2512 assert(_g1->check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
2513 "sanity check"); | |
342 | 2514 } else { |
2515 KnownGarbageClosure knownGarbagecl(_collectionSetChooser); | |
2516 _g1->heap_region_iterate(&knownGarbagecl); | |
2517 } | |
2518 double known_garbage_end; | |
2519 if (G1PrintParCleanupStats) { | |
2520 known_garbage_end = os::elapsedTime(); | |
2521 gclog_or_tty->print_cr(" compute known garbage: %8.3f ms.", | |
2522 (known_garbage_end - clear_marked_end)*1000.0); | |
2523 } | |
2524 _collectionSetChooser->sortMarkedHeapRegions(); | |
2525 double sort_end; | |
2526 if (G1PrintParCleanupStats) { | |
2527 sort_end = os::elapsedTime(); | |
2528 gclog_or_tty->print_cr(" sorting: %8.3f ms.", | |
2529 (sort_end - known_garbage_end)*1000.0); | |
2530 } | |
2531 | |
2532 record_concurrent_mark_cleanup_end_work2(); | |
2533 double work2_end; | |
2534 if (G1PrintParCleanupStats) { | |
2535 work2_end = os::elapsedTime(); | |
2536 gclog_or_tty->print_cr(" work2: %8.3f ms.", | |
2537 (work2_end - sort_end)*1000.0); | |
2538 } | |
2539 } | |
2540 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2541 // Add the heap region at the head of the non-incremental collection set |
342 | 2542 void G1CollectorPolicy:: |
2543 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
|
2544 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
|
2545 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
|
2546 |
342 | 2547 if (_g1->mark_in_progress()) |
2548 _g1->concurrent_mark()->registerCSetRegion(hr); | |
2549 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2550 assert(!hr->in_collection_set(), "should not already be in the CSet"); |
342 | 2551 hr->set_in_collection_set(true); |
2552 hr->set_next_in_collection_set(_collection_set); | |
2553 _collection_set = hr; | |
2554 _collection_set_size++; | |
2555 _collection_set_bytes_used_before += hr->used(); | |
526 | 2556 _g1->register_region_with_in_cset_fast_test(hr); |
342 | 2557 } |
2558 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2559 // 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
|
2560 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
|
2561 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
|
2562 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2563 _inc_cset_head = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2564 _inc_cset_tail = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2565 _inc_cset_size = 0; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2566 _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
|
2567 |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2568 _inc_cset_young_index = 0; |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2569 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2570 _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
|
2571 _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
|
2572 _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
|
2573 _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
|
2574 _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
|
2575 _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
|
2576 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2577 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2578 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
|
2579 // 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
|
2580 // * 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
|
2581 // evacuation pause, |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2582 // * 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
|
2583 // 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
|
2584 // * 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
|
2585 // 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
|
2586 // 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
|
2587 // 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
|
2588 // 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
|
2589 // refine thread (RSet sampling). |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2590 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2591 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
|
2592 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
|
2593 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2594 _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
|
2595 _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
|
2596 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2597 _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
|
2598 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2599 // 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
|
2600 // 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
|
2601 // 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
|
2602 // rset sampling code |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2603 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
|
2604 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
|
2605 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2606 #if PREDICTIONS_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2607 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
|
2608 _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
|
2609 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2610 // 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
|
2611 _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
|
2612 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2613 // 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
|
2614 // 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
|
2615 // 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
|
2616 // rset sampling code |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2617 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
|
2618 #endif // PREDICTIONS_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2619 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2620 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2621 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
|
2622 // 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
|
2623 // 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
|
2624 // 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
|
2625 // 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
|
2626 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2627 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
|
2628 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
|
2629 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2630 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
|
2631 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
|
2632 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
|
2633 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2634 // 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
|
2635 // 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
|
2636 _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
|
2637 _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
|
2638 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2639 _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
|
2640 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2641 // 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
|
2642 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
|
2643 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
|
2644 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2645 #if PREDICTIONS_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2646 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
|
2647 _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
|
2648 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2649 // 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
|
2650 _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
|
2651 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2652 // 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
|
2653 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
|
2654 #endif // PREDICTIONS_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2655 } |
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 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
|
2658 // 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
|
2659 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
|
2660 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2661 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
|
2662 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
|
2663 } |
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 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
|
2666 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
|
2667 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
|
2668 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
|
2669 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2670 // 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
|
2671 // 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
|
2672 // 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
|
2673 // 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
|
2674 // 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
|
2675 // 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
|
2676 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2677 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
|
2678 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
|
2679 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2680 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
|
2681 _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
|
2682 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2683 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
|
2684 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
|
2685 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
|
2686 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2687 _inc_cset_size++; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2688 _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
|
2689 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2690 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
|
2691 ++_inc_cset_young_index; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2692 } |
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 // 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
|
2695 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
|
2696 // 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
|
2697 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
|
2698 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2699 // Do the 'common' stuff |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2700 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
|
2701 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2702 // 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
|
2703 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
|
2704 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
|
2705 _inc_cset_head = hr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2706 } else { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2707 _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
|
2708 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2709 _inc_cset_tail = hr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2710 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2711 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2712 // 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
|
2713 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
|
2714 // 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
|
2715 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
|
2716 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2717 // Do the 'common' stuff |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2718 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
|
2719 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2720 // 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
|
2721 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
|
2722 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
|
2723 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
|
2724 _inc_cset_tail = hr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2725 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2726 _inc_cset_head = hr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2727 } |
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 #ifndef PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2730 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
|
2731 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
|
2732 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2733 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
|
2734 HeapRegion* csr = list_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2735 while (csr != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2736 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
|
2737 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
|
2738 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
|
2739 "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
|
2740 csr->bottom(), csr->end(), |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2741 csr->top(), |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2742 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
|
2743 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
|
2744 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
|
2745 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
|
2746 csr->is_young(), |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2747 csr->is_survivor()); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2748 csr = next; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2749 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2750 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2751 #endif // !PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2752 |
1707 | 2753 void |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2754 G1CollectorPolicy_BestRegionsFirst::choose_collection_set( |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2755 double 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
|
2756 // 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
|
2757 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
|
2758 |
342 | 2759 start_recording_regions(); |
2760 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2761 guarantee(target_pause_time_ms > 0.0, |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2762 err_msg("target_pause_time_ms = %1.6lf should be positive", |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2763 target_pause_time_ms)); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2764 guarantee(_collection_set == NULL, "Precondition"); |
342 | 2765 |
2766 double base_time_ms = predict_base_elapsed_time_ms(_pending_cards); | |
2767 double predicted_pause_time_ms = base_time_ms; | |
2768 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2769 double time_remaining_ms = target_pause_time_ms - base_time_ms; |
342 | 2770 |
2771 // the 10% and 50% values are arbitrary... | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2772 if (time_remaining_ms < 0.10 * target_pause_time_ms) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2773 time_remaining_ms = 0.50 * target_pause_time_ms; |
342 | 2774 _within_target = false; |
2775 } else { | |
2776 _within_target = true; | |
2777 } | |
2778 | |
2779 // We figure out the number of bytes available for future to-space. | |
2780 // For new regions without marking information, we must assume the | |
2781 // worst-case of complete survival. If we have marking information for a | |
2782 // region, we can bound the amount of live data. We can add a number of | |
2783 // such regions, as long as the sum of the live data bounds does not | |
2784 // exceed the available evacuation space. | |
2785 size_t max_live_bytes = _g1->free_regions() * HeapRegion::GrainBytes; | |
2786 | |
2787 size_t expansion_bytes = | |
2788 _g1->expansion_regions() * HeapRegion::GrainBytes; | |
2789 | |
677 | 2790 _collection_set_bytes_used_before = 0; |
2791 _collection_set_size = 0; | |
342 | 2792 |
2793 // Adjust for expansion and slop. | |
2794 max_live_bytes = max_live_bytes + expansion_bytes; | |
2795 | |
2796 HeapRegion* hr; | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2797 double young_start_time_sec = os::elapsedTime(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2798 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2799 if (G1PolicyVerbose > 0) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2800 gclog_or_tty->print_cr("Adding %d young regions to the CSet", |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2801 _g1->young_list()->length()); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2802 } |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2803 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2804 _young_cset_length = 0; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2805 _last_young_gc_full = full_young_gcs() ? true : false; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2806 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2807 if (_last_young_gc_full) |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2808 ++_full_young_pause_num; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2809 else |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2810 ++_partial_young_pause_num; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2811 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2812 // The young list is laid with the survivor regions from the previous |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2813 // pause are appended to the RHS of the young list, i.e. |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2814 // [Newly Young Regions ++ Survivors from last pause]. |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2815 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2816 hr = _g1->young_list()->first_survivor_region(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2817 while (hr != NULL) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2818 assert(hr->is_survivor(), "badly formed young list"); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2819 hr->set_young(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2820 hr = hr->get_next_young_region(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2821 } |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2822 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2823 // Clear the fields that point to the survivor list - they are |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2824 // all young now. |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2825 _g1->young_list()->clear_survivors(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2826 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2827 if (_g1->mark_in_progress()) |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2828 _g1->concurrent_mark()->register_collection_set_finger(_inc_cset_max_finger); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2829 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2830 _young_cset_length = _inc_cset_young_index; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2831 _collection_set = _inc_cset_head; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2832 _collection_set_size = _inc_cset_size; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2833 _collection_set_bytes_used_before = _inc_cset_bytes_used_before; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2834 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2835 // For young regions in the collection set, we assume the worst |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2836 // case of complete survival |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2837 max_live_bytes -= _inc_cset_size * HeapRegion::GrainBytes; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2838 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2839 time_remaining_ms -= _inc_cset_predicted_elapsed_time_ms; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2840 predicted_pause_time_ms += _inc_cset_predicted_elapsed_time_ms; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2841 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2842 // The number of recorded young regions is the incremental |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2843 // collection set's current size |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2844 set_recorded_young_regions(_inc_cset_size); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2845 set_recorded_rs_lengths(_inc_cset_recorded_rs_lengths); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2846 set_recorded_young_bytes(_inc_cset_recorded_young_bytes); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2847 #if PREDICTIONS_VERBOSE |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2848 set_predicted_bytes_to_copy(_inc_cset_predicted_bytes_to_copy); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2849 #endif // PREDICTIONS_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2850 |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2851 if (G1PolicyVerbose > 0) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2852 gclog_or_tty->print_cr(" Added " PTR_FORMAT " Young Regions to CS.", |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2853 _inc_cset_size); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2854 gclog_or_tty->print_cr(" (" SIZE_FORMAT " KB left in heap.)", |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2855 max_live_bytes/K); |
342 | 2856 } |
2857 | |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2858 assert(_inc_cset_size == _g1->young_list()->length(), "Invariant"); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2859 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2860 double young_end_time_sec = os::elapsedTime(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2861 _recorded_young_cset_choice_time_ms = |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2862 (young_end_time_sec - young_start_time_sec) * 1000.0; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2863 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2864 // We are doing young collections so reset this. |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2865 non_young_start_time_sec = young_end_time_sec; |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2866 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2867 if (!full_young_gcs()) { |
342 | 2868 bool should_continue = true; |
2869 NumberSeq seq; | |
2870 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
|
2871 |
342 | 2872 do { |
2873 hr = _collectionSetChooser->getNextMarkedRegion(time_remaining_ms, | |
2874 avg_prediction); | |
677 | 2875 if (hr != NULL) { |
342 | 2876 double predicted_time_ms = predict_region_elapsed_time_ms(hr, false); |
2877 time_remaining_ms -= predicted_time_ms; | |
2878 predicted_pause_time_ms += predicted_time_ms; | |
2879 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
|
2880 record_non_young_cset_region(hr); |
342 | 2881 max_live_bytes -= MIN2(hr->max_live_bytes(), max_live_bytes); |
2882 if (G1PolicyVerbose > 0) { | |
2883 gclog_or_tty->print_cr(" (" SIZE_FORMAT " KB left in heap.)", | |
2884 max_live_bytes/K); | |
2885 } | |
2886 seq.add(predicted_time_ms); | |
2887 avg_prediction = seq.avg() + seq.sd(); | |
2888 } | |
2889 should_continue = | |
2890 ( hr != NULL) && | |
2891 ( (adaptive_young_list_length()) ? time_remaining_ms > 0.0 | |
2892 : _collection_set_size < _young_list_fixed_length ); | |
2893 } while (should_continue); | |
2894 | |
2895 if (!adaptive_young_list_length() && | |
2896 _collection_set_size < _young_list_fixed_length) | |
2897 _should_revert_to_full_young_gcs = true; | |
2898 } | |
2899 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2900 stop_incremental_cset_building(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2901 |
342 | 2902 count_CS_bytes_used(); |
2903 | |
2904 end_recording_regions(); | |
2905 | |
2906 double non_young_end_time_sec = os::elapsedTime(); | |
2907 _recorded_non_young_cset_choice_time_ms = | |
2908 (non_young_end_time_sec - non_young_start_time_sec) * 1000.0; | |
2909 } | |
2910 | |
2911 void G1CollectorPolicy_BestRegionsFirst::record_full_collection_end() { | |
2912 G1CollectorPolicy::record_full_collection_end(); | |
2913 _collectionSetChooser->updateAfterFullCollection(); | |
2914 } | |
2915 | |
2916 void G1CollectorPolicy_BestRegionsFirst:: | |
2917 expand_if_possible(size_t numRegions) { | |
2918 size_t expansion_bytes = numRegions * HeapRegion::GrainBytes; | |
2919 _g1->expand(expansion_bytes); | |
2920 } | |
2921 | |
2922 void G1CollectorPolicy_BestRegionsFirst:: | |
1707 | 2923 record_collection_pause_end() { |
2924 G1CollectorPolicy::record_collection_pause_end(); | |
342 | 2925 assert(assertMarkedBytesDataOK(), "Marked regions not OK at pause end."); |
2926 } |