Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 6109:bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
Summary: Simplify code, remove unused code, remove ExitAfterGCNum
Reviewed-by: huntch, johnc
author | brutisso |
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date | Thu, 31 May 2012 21:10:33 +0200 |
parents | 9d679effd28c |
children | 922993931b3d |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2012, 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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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" | |
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31 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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32 #include "gc_implementation/g1/g1Log.hpp" |
1972 | 33 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
34 #include "gc_implementation/shared/gcPolicyCounters.hpp" | |
35 #include "runtime/arguments.hpp" | |
36 #include "runtime/java.hpp" | |
37 #include "runtime/mutexLocker.hpp" | |
38 #include "utilities/debug.hpp" | |
342 | 39 |
40 // Different defaults for different number of GC threads | |
41 // They were chosen by running GCOld and SPECjbb on debris with different | |
42 // numbers of GC threads and choosing them based on the results | |
43 | |
44 // all the same | |
45 static double rs_length_diff_defaults[] = { | |
46 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 | |
47 }; | |
48 | |
49 static double cost_per_card_ms_defaults[] = { | |
50 0.01, 0.005, 0.005, 0.003, 0.003, 0.002, 0.002, 0.0015 | |
51 }; | |
52 | |
53 // all the same | |
4710 | 54 static double young_cards_per_entry_ratio_defaults[] = { |
342 | 55 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 |
56 }; | |
57 | |
58 static double cost_per_entry_ms_defaults[] = { | |
59 0.015, 0.01, 0.01, 0.008, 0.008, 0.0055, 0.0055, 0.005 | |
60 }; | |
61 | |
62 static double cost_per_byte_ms_defaults[] = { | |
63 0.00006, 0.00003, 0.00003, 0.000015, 0.000015, 0.00001, 0.00001, 0.000009 | |
64 }; | |
65 | |
66 // these should be pretty consistent | |
67 static double constant_other_time_ms_defaults[] = { | |
68 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0 | |
69 }; | |
70 | |
71 | |
72 static double young_other_cost_per_region_ms_defaults[] = { | |
73 0.3, 0.2, 0.2, 0.15, 0.15, 0.12, 0.12, 0.1 | |
74 }; | |
75 | |
76 static double non_young_other_cost_per_region_ms_defaults[] = { | |
77 1.0, 0.7, 0.7, 0.5, 0.5, 0.42, 0.42, 0.30 | |
78 }; | |
79 | |
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80 // Help class for avoiding interleaved logging |
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81 class LineBuffer: public StackObj { |
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82 |
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83 private: |
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84 static const int BUFFER_LEN = 1024; |
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85 static const int INDENT_CHARS = 3; |
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86 char _buffer[BUFFER_LEN]; |
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87 int _indent_level; |
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88 int _cur; |
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89 |
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90 void vappend(const char* format, va_list ap) { |
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91 int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap); |
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92 if (res != -1) { |
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93 _cur += res; |
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94 } else { |
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95 DEBUG_ONLY(warning("buffer too small in LineBuffer");) |
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96 _buffer[BUFFER_LEN -1] = 0; |
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97 _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again |
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98 } |
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99 } |
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100 |
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101 public: |
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102 explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) { |
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103 for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) { |
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104 _buffer[_cur] = ' '; |
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105 } |
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106 } |
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107 |
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108 #ifndef PRODUCT |
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109 ~LineBuffer() { |
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110 assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?"); |
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111 } |
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112 #endif |
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113 |
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114 void append(const char* format, ...) { |
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115 va_list ap; |
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116 va_start(ap, format); |
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117 vappend(format, ap); |
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118 va_end(ap); |
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119 } |
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120 |
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121 void append_and_print_cr(const char* format, ...) { |
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122 va_list ap; |
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123 va_start(ap, format); |
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124 vappend(format, ap); |
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125 va_end(ap); |
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126 gclog_or_tty->print_cr("%s", _buffer); |
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127 _cur = _indent_level * INDENT_CHARS; |
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128 } |
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129 }; |
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130 |
342 | 131 G1CollectorPolicy::G1CollectorPolicy() : |
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132 _parallel_gc_threads(G1CollectedHeap::use_parallel_gc_threads() |
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133 ? ParallelGCThreads : 1), |
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134 |
342 | 135 _recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), |
136 _stop_world_start(0.0), | |
137 | |
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138 _cur_clear_ct_time_ms(0.0), |
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139 _root_region_scan_wait_time_ms(0.0), |
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140 |
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141 _cur_ref_proc_time_ms(0.0), |
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142 _cur_ref_enq_time_ms(0.0), |
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143 |
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144 #ifndef PRODUCT |
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145 _min_clear_cc_time_ms(-1.0), |
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146 _max_clear_cc_time_ms(-1.0), |
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147 _cur_clear_cc_time_ms(0.0), |
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148 _cum_clear_cc_time_ms(0.0), |
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149 _num_cc_clears(0L), |
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150 #endif |
342 | 151 |
152 _concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
153 _concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), | |
154 | |
155 _alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
156 _prev_collection_pause_end_ms(0.0), | |
157 _pending_card_diff_seq(new TruncatedSeq(TruncatedSeqLength)), | |
158 _rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)), | |
159 _cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
4710 | 160 _young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)), |
161 _mixed_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)), | |
342 | 162 _cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
4710 | 163 _mixed_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
342 | 164 _cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
165 _cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)), | |
166 _constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
167 _young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)), | |
168 _non_young_other_cost_per_region_ms_seq( | |
169 new TruncatedSeq(TruncatedSeqLength)), | |
170 | |
171 _pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)), | |
172 _rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)), | |
173 | |
751 | 174 _pause_time_target_ms((double) MaxGCPauseMillis), |
342 | 175 |
4710 | 176 _gcs_are_young(true), |
342 | 177 |
178 _during_marking(false), | |
179 _in_marking_window(false), | |
180 _in_marking_window_im(false), | |
181 | |
4710 | 182 _recent_prev_end_times_for_all_gcs_sec( |
183 new TruncatedSeq(NumPrevPausesForHeuristics)), | |
342 | 184 |
185 _recent_avg_pause_time_ratio(0.0), | |
186 | |
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187 _initiate_conc_mark_if_possible(false), |
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188 _during_initial_mark_pause(false), |
4710 | 189 _last_young_gc(false), |
190 _last_gc_was_young(false), | |
342 | 191 |
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192 _eden_bytes_before_gc(0), |
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193 _survivor_bytes_before_gc(0), |
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194 _capacity_before_gc(0), |
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195 |
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196 _eden_cset_region_length(0), |
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197 _survivor_cset_region_length(0), |
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198 _old_cset_region_length(0), |
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199 |
342 | 200 _collection_set(NULL), |
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201 _collection_set_bytes_used_before(0), |
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202 |
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203 // Incremental CSet attributes |
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204 _inc_cset_build_state(Inactive), |
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205 _inc_cset_head(NULL), |
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206 _inc_cset_tail(NULL), |
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207 _inc_cset_bytes_used_before(0), |
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208 _inc_cset_max_finger(NULL), |
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209 _inc_cset_recorded_rs_lengths(0), |
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210 _inc_cset_recorded_rs_lengths_diffs(0), |
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211 _inc_cset_predicted_elapsed_time_ms(0.0), |
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212 _inc_cset_predicted_elapsed_time_ms_diffs(0.0), |
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213 |
342 | 214 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
215 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
216 #endif // _MSC_VER | |
217 | |
218 _short_lived_surv_rate_group(new SurvRateGroup(this, "Short Lived", | |
219 G1YoungSurvRateNumRegionsSummary)), | |
220 _survivor_surv_rate_group(new SurvRateGroup(this, "Survivor", | |
545 | 221 G1YoungSurvRateNumRegionsSummary)), |
342 | 222 // add here any more surv rate groups |
545 | 223 _recorded_survivor_regions(0), |
224 _recorded_survivor_head(NULL), | |
225 _recorded_survivor_tail(NULL), | |
1356 | 226 _survivors_age_table(true), |
227 | |
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228 _gc_overhead_perc(0.0) { |
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229 |
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230 // Set up the region size and associated fields. Given that the |
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231 // policy is created before the heap, we have to set this up here, |
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232 // so it's done as soon as possible. |
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233 HeapRegion::setup_heap_region_size(Arguments::min_heap_size()); |
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234 HeapRegionRemSet::setup_remset_size(); |
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235 |
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236 G1ErgoVerbose::initialize(); |
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237 if (PrintAdaptiveSizePolicy) { |
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238 // Currently, we only use a single switch for all the heuristics. |
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239 G1ErgoVerbose::set_enabled(true); |
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240 // Given that we don't currently have a verboseness level |
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241 // parameter, we'll hardcode this to high. This can be easily |
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242 // changed in the future. |
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243 G1ErgoVerbose::set_level(ErgoHigh); |
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244 } else { |
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245 G1ErgoVerbose::set_enabled(false); |
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246 } |
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247 |
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248 // Verify PLAB sizes |
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249 const size_t region_size = HeapRegion::GrainWords; |
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250 if (YoungPLABSize > region_size || OldPLABSize > region_size) { |
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251 char buffer[128]; |
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252 jio_snprintf(buffer, sizeof(buffer), "%sPLABSize should be at most "SIZE_FORMAT, |
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253 OldPLABSize > region_size ? "Old" : "Young", region_size); |
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254 vm_exit_during_initialization(buffer); |
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255 } |
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256 |
342 | 257 _recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime()); |
258 _prev_collection_pause_end_ms = os::elapsedTime() * 1000.0; | |
259 | |
1611 | 260 _par_last_gc_worker_start_times_ms = new double[_parallel_gc_threads]; |
342 | 261 _par_last_ext_root_scan_times_ms = new double[_parallel_gc_threads]; |
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262 _par_last_satb_filtering_times_ms = new double[_parallel_gc_threads]; |
342 | 263 |
264 _par_last_update_rs_times_ms = new double[_parallel_gc_threads]; | |
265 _par_last_update_rs_processed_buffers = new double[_parallel_gc_threads]; | |
266 | |
267 _par_last_scan_rs_times_ms = new double[_parallel_gc_threads]; | |
268 | |
269 _par_last_obj_copy_times_ms = new double[_parallel_gc_threads]; | |
270 | |
271 _par_last_termination_times_ms = new double[_parallel_gc_threads]; | |
1611 | 272 _par_last_termination_attempts = new double[_parallel_gc_threads]; |
273 _par_last_gc_worker_end_times_ms = new double[_parallel_gc_threads]; | |
2430 | 274 _par_last_gc_worker_times_ms = new double[_parallel_gc_threads]; |
4023 | 275 _par_last_gc_worker_other_times_ms = new double[_parallel_gc_threads]; |
342 | 276 |
277 int index; | |
278 if (ParallelGCThreads == 0) | |
279 index = 0; | |
280 else if (ParallelGCThreads > 8) | |
281 index = 7; | |
282 else | |
283 index = ParallelGCThreads - 1; | |
284 | |
285 _pending_card_diff_seq->add(0.0); | |
286 _rs_length_diff_seq->add(rs_length_diff_defaults[index]); | |
287 _cost_per_card_ms_seq->add(cost_per_card_ms_defaults[index]); | |
4710 | 288 _young_cards_per_entry_ratio_seq->add( |
289 young_cards_per_entry_ratio_defaults[index]); | |
342 | 290 _cost_per_entry_ms_seq->add(cost_per_entry_ms_defaults[index]); |
291 _cost_per_byte_ms_seq->add(cost_per_byte_ms_defaults[index]); | |
292 _constant_other_time_ms_seq->add(constant_other_time_ms_defaults[index]); | |
293 _young_other_cost_per_region_ms_seq->add( | |
294 young_other_cost_per_region_ms_defaults[index]); | |
295 _non_young_other_cost_per_region_ms_seq->add( | |
296 non_young_other_cost_per_region_ms_defaults[index]); | |
297 | |
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298 // Below, we might need to calculate the pause time target based on |
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299 // the pause interval. When we do so we are going to give G1 maximum |
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300 // flexibility and allow it to do pauses when it needs to. So, we'll |
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301 // arrange that the pause interval to be pause time target + 1 to |
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302 // ensure that a) the pause time target is maximized with respect to |
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303 // the pause interval and b) we maintain the invariant that pause |
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304 // time target < pause interval. If the user does not want this |
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305 // maximum flexibility, they will have to set the pause interval |
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306 // explicitly. |
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307 |
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308 // First make sure that, if either parameter is set, its value is |
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309 // reasonable. |
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310 if (!FLAG_IS_DEFAULT(MaxGCPauseMillis)) { |
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311 if (MaxGCPauseMillis < 1) { |
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312 vm_exit_during_initialization("MaxGCPauseMillis should be " |
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313 "greater than 0"); |
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314 } |
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315 } |
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316 if (!FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
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317 if (GCPauseIntervalMillis < 1) { |
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318 vm_exit_during_initialization("GCPauseIntervalMillis should be " |
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319 "greater than 0"); |
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320 } |
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321 } |
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322 |
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323 // Then, if the pause time target parameter was not set, set it to |
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324 // the default value. |
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325 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) { |
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326 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
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327 // The default pause time target in G1 is 200ms |
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328 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200); |
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329 } else { |
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330 // We do not allow the pause interval to be set without the |
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331 // pause time target |
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332 vm_exit_during_initialization("GCPauseIntervalMillis cannot be set " |
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333 "without setting MaxGCPauseMillis"); |
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334 } |
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335 } |
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336 |
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337 // Then, if the interval parameter was not set, set it according to |
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338 // the pause time target (this will also deal with the case when the |
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339 // pause time target is the default value). |
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340 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
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341 FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1); |
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342 } |
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343 |
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344 // Finally, make sure that the two parameters are consistent. |
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345 if (MaxGCPauseMillis >= GCPauseIntervalMillis) { |
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346 char buffer[256]; |
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347 jio_snprintf(buffer, 256, |
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348 "MaxGCPauseMillis (%u) should be less than " |
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349 "GCPauseIntervalMillis (%u)", |
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350 MaxGCPauseMillis, GCPauseIntervalMillis); |
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351 vm_exit_during_initialization(buffer); |
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352 } |
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353 |
751 | 354 double max_gc_time = (double) MaxGCPauseMillis / 1000.0; |
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355 double time_slice = (double) GCPauseIntervalMillis / 1000.0; |
342 | 356 _mmu_tracker = new G1MMUTrackerQueue(time_slice, max_gc_time); |
751 | 357 _sigma = (double) G1ConfidencePercent / 100.0; |
342 | 358 |
359 // start conservatively (around 50ms is about right) | |
360 _concurrent_mark_remark_times_ms->add(0.05); | |
361 _concurrent_mark_cleanup_times_ms->add(0.20); | |
362 _tenuring_threshold = MaxTenuringThreshold; | |
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363 // _max_survivor_regions will be calculated by |
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364 // update_young_list_target_length() during initialization. |
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365 _max_survivor_regions = 0; |
545 | 366 |
1356 | 367 assert(GCTimeRatio > 0, |
368 "we should have set it to a default value set_g1_gc_flags() " | |
369 "if a user set it to 0"); | |
370 _gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio)); | |
371 | |
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372 uintx reserve_perc = G1ReservePercent; |
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373 // Put an artificial ceiling on this so that it's not set to a silly value. |
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374 if (reserve_perc > 50) { |
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375 reserve_perc = 50; |
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376 warning("G1ReservePercent is set to a value that is too large, " |
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377 "it's been updated to %u", reserve_perc); |
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378 } |
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379 _reserve_factor = (double) reserve_perc / 100.0; |
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380 // This will be set when the heap is expanded |
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381 // for the first time during initialization. |
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382 _reserve_regions = 0; |
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383 |
342 | 384 initialize_all(); |
4013 | 385 _collectionSetChooser = new CollectionSetChooser(); |
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386 _young_gen_sizer = new G1YoungGenSizer(); // Must be after call to initialize_flags |
342 | 387 } |
388 | |
389 void G1CollectorPolicy::initialize_flags() { | |
390 set_min_alignment(HeapRegion::GrainBytes); | |
391 set_max_alignment(GenRemSet::max_alignment_constraint(rem_set_name())); | |
547
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392 if (SurvivorRatio < 1) { |
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393 vm_exit_during_initialization("Invalid survivor ratio specified"); |
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394 } |
342 | 395 CollectorPolicy::initialize_flags(); |
396 } | |
397 | |
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398 G1YoungGenSizer::G1YoungGenSizer() : _sizer_kind(SizerDefaults), _adaptive_size(true) { |
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399 assert(G1DefaultMinNewGenPercent <= G1DefaultMaxNewGenPercent, "Min larger than max"); |
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400 assert(G1DefaultMinNewGenPercent > 0 && G1DefaultMinNewGenPercent < 100, "Min out of bounds"); |
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401 assert(G1DefaultMaxNewGenPercent > 0 && G1DefaultMaxNewGenPercent < 100, "Max out of bounds"); |
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402 |
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403 if (FLAG_IS_CMDLINE(NewRatio)) { |
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404 if (FLAG_IS_CMDLINE(NewSize) || FLAG_IS_CMDLINE(MaxNewSize)) { |
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405 warning("-XX:NewSize and -XX:MaxNewSize override -XX:NewRatio"); |
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406 } else { |
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407 _sizer_kind = SizerNewRatio; |
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408 _adaptive_size = false; |
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409 return; |
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410 } |
3976 | 411 } |
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412 |
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413 if (FLAG_IS_CMDLINE(NewSize)) { |
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414 _min_desired_young_length = MAX2((uint) (NewSize / HeapRegion::GrainBytes), |
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415 1U); |
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416 if (FLAG_IS_CMDLINE(MaxNewSize)) { |
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417 _max_desired_young_length = |
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418 MAX2((uint) (MaxNewSize / HeapRegion::GrainBytes), |
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419 1U); |
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420 _sizer_kind = SizerMaxAndNewSize; |
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421 _adaptive_size = _min_desired_young_length == _max_desired_young_length; |
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422 } else { |
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423 _sizer_kind = SizerNewSizeOnly; |
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424 } |
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425 } else if (FLAG_IS_CMDLINE(MaxNewSize)) { |
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426 _max_desired_young_length = |
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427 MAX2((uint) (MaxNewSize / HeapRegion::GrainBytes), |
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428 1U); |
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429 _sizer_kind = SizerMaxNewSizeOnly; |
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430 } |
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431 } |
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432 |
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433 uint G1YoungGenSizer::calculate_default_min_length(uint new_number_of_heap_regions) { |
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434 uint default_value = (new_number_of_heap_regions * G1DefaultMinNewGenPercent) / 100; |
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435 return MAX2(1U, default_value); |
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436 } |
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437 |
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438 uint G1YoungGenSizer::calculate_default_max_length(uint new_number_of_heap_regions) { |
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439 uint default_value = (new_number_of_heap_regions * G1DefaultMaxNewGenPercent) / 100; |
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440 return MAX2(1U, default_value); |
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441 } |
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442 |
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443 void G1YoungGenSizer::heap_size_changed(uint new_number_of_heap_regions) { |
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444 assert(new_number_of_heap_regions > 0, "Heap must be initialized"); |
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445 |
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446 switch (_sizer_kind) { |
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447 case SizerDefaults: |
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448 _min_desired_young_length = calculate_default_min_length(new_number_of_heap_regions); |
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449 _max_desired_young_length = calculate_default_max_length(new_number_of_heap_regions); |
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450 break; |
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451 case SizerNewSizeOnly: |
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452 _max_desired_young_length = calculate_default_max_length(new_number_of_heap_regions); |
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453 _max_desired_young_length = MAX2(_min_desired_young_length, _max_desired_young_length); |
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454 break; |
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455 case SizerMaxNewSizeOnly: |
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456 _min_desired_young_length = calculate_default_min_length(new_number_of_heap_regions); |
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457 _min_desired_young_length = MIN2(_min_desired_young_length, _max_desired_young_length); |
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458 break; |
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459 case SizerMaxAndNewSize: |
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460 // Do nothing. Values set on the command line, don't update them at runtime. |
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461 break; |
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462 case SizerNewRatio: |
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463 _min_desired_young_length = new_number_of_heap_regions / (NewRatio + 1); |
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464 _max_desired_young_length = _min_desired_young_length; |
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465 break; |
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466 default: |
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467 ShouldNotReachHere(); |
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468 } |
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469 |
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470 assert(_min_desired_young_length <= _max_desired_young_length, "Invalid min/max young gen size values"); |
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471 } |
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472 |
342 | 473 void G1CollectorPolicy::init() { |
474 // Set aside an initial future to_space. | |
475 _g1 = G1CollectedHeap::heap(); | |
476 | |
477 assert(Heap_lock->owned_by_self(), "Locking discipline."); | |
478 | |
545 | 479 initialize_gc_policy_counters(); |
480 | |
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481 if (adaptive_young_list_length()) { |
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482 _young_list_fixed_length = 0; |
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483 } else { |
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484 _young_list_fixed_length = _young_gen_sizer->min_desired_young_length(); |
342 | 485 } |
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486 _free_regions_at_end_of_collection = _g1->free_regions(); |
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487 update_young_list_target_length(); |
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488 _prev_eden_capacity = _young_list_target_length * HeapRegion::GrainBytes; |
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489 |
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490 // We may immediately start allocating regions and placing them on the |
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491 // collection set list. Initialize the per-collection set info |
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492 start_incremental_cset_building(); |
342 | 493 } |
494 | |
545 | 495 // Create the jstat counters for the policy. |
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496 void G1CollectorPolicy::initialize_gc_policy_counters() { |
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497 _gc_policy_counters = new GCPolicyCounters("GarbageFirst", 1, 3); |
545 | 498 } |
499 | |
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500 bool G1CollectorPolicy::predict_will_fit(uint young_length, |
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501 double base_time_ms, |
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502 uint base_free_regions, |
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503 double target_pause_time_ms) { |
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504 if (young_length >= base_free_regions) { |
342 | 505 // end condition 1: not enough space for the young regions |
506 return false; | |
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507 } |
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508 |
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509 double accum_surv_rate = accum_yg_surv_rate_pred((int) young_length - 1); |
342 | 510 size_t bytes_to_copy = |
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511 (size_t) (accum_surv_rate * (double) HeapRegion::GrainBytes); |
342 | 512 double copy_time_ms = predict_object_copy_time_ms(bytes_to_copy); |
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513 double young_other_time_ms = predict_young_other_time_ms(young_length); |
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514 double pause_time_ms = base_time_ms + copy_time_ms + young_other_time_ms; |
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515 if (pause_time_ms > target_pause_time_ms) { |
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516 // end condition 2: prediction is over the target pause time |
342 | 517 return false; |
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518 } |
342 | 519 |
520 size_t free_bytes = | |
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521 (base_free_regions - young_length) * HeapRegion::GrainBytes; |
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522 if ((2.0 * sigma()) * (double) bytes_to_copy > (double) free_bytes) { |
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523 // end condition 3: out-of-space (conservatively!) |
342 | 524 return false; |
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525 } |
342 | 526 |
527 // success! | |
528 return true; | |
529 } | |
530 | |
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531 void G1CollectorPolicy::record_new_heap_size(uint new_number_of_regions) { |
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532 // re-calculate the necessary reserve |
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533 double reserve_regions_d = (double) new_number_of_regions * _reserve_factor; |
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534 // We use ceiling so that if reserve_regions_d is > 0.0 (but |
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535 // smaller than 1.0) we'll get 1. |
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536 _reserve_regions = (uint) ceil(reserve_regions_d); |
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537 |
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538 _young_gen_sizer->heap_size_changed(new_number_of_regions); |
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539 } |
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540 |
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541 uint G1CollectorPolicy::calculate_young_list_desired_min_length( |
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542 uint base_min_length) { |
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543 uint desired_min_length = 0; |
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544 if (adaptive_young_list_length()) { |
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545 if (_alloc_rate_ms_seq->num() > 3) { |
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546 double now_sec = os::elapsedTime(); |
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547 double when_ms = _mmu_tracker->when_max_gc_sec(now_sec) * 1000.0; |
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548 double alloc_rate_ms = predict_alloc_rate_ms(); |
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549 desired_min_length = (uint) ceil(alloc_rate_ms * when_ms); |
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550 } else { |
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551 // otherwise we don't have enough info to make the prediction |
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552 } |
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553 } |
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554 desired_min_length += base_min_length; |
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555 // make sure we don't go below any user-defined minimum bound |
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556 return MAX2(_young_gen_sizer->min_desired_young_length(), desired_min_length); |
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557 } |
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558 |
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559 uint G1CollectorPolicy::calculate_young_list_desired_max_length() { |
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560 // Here, we might want to also take into account any additional |
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561 // constraints (i.e., user-defined minimum bound). Currently, we |
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562 // effectively don't set this bound. |
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563 return _young_gen_sizer->max_desired_young_length(); |
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564 } |
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565 |
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566 void G1CollectorPolicy::update_young_list_target_length(size_t rs_lengths) { |
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567 if (rs_lengths == (size_t) -1) { |
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568 // if it's set to the default value (-1), we should predict it; |
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569 // otherwise, use the given value. |
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570 rs_lengths = (size_t) get_new_prediction(_rs_lengths_seq); |
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571 } |
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572 |
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573 // Calculate the absolute and desired min bounds. |
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574 |
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575 // This is how many young regions we already have (currently: the survivors). |
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576 uint base_min_length = recorded_survivor_regions(); |
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577 // This is the absolute minimum young length, which ensures that we |
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578 // can allocate one eden region in the worst-case. |
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579 uint absolute_min_length = base_min_length + 1; |
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580 uint desired_min_length = |
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581 calculate_young_list_desired_min_length(base_min_length); |
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582 if (desired_min_length < absolute_min_length) { |
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583 desired_min_length = absolute_min_length; |
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584 } |
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585 |
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586 // Calculate the absolute and desired max bounds. |
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587 |
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588 // We will try our best not to "eat" into the reserve. |
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589 uint absolute_max_length = 0; |
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590 if (_free_regions_at_end_of_collection > _reserve_regions) { |
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591 absolute_max_length = _free_regions_at_end_of_collection - _reserve_regions; |
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592 } |
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593 uint desired_max_length = calculate_young_list_desired_max_length(); |
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594 if (desired_max_length > absolute_max_length) { |
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595 desired_max_length = absolute_max_length; |
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596 } |
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597 |
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598 uint young_list_target_length = 0; |
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599 if (adaptive_young_list_length()) { |
4710 | 600 if (gcs_are_young()) { |
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601 young_list_target_length = |
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602 calculate_young_list_target_length(rs_lengths, |
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603 base_min_length, |
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604 desired_min_length, |
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605 desired_max_length); |
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606 _rs_lengths_prediction = rs_lengths; |
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607 } else { |
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608 // Don't calculate anything and let the code below bound it to |
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609 // the desired_min_length, i.e., do the next GC as soon as |
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610 // possible to maximize how many old regions we can add to it. |
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611 } |
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612 } else { |
4912
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613 // The user asked for a fixed young gen so we'll fix the young gen |
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614 // whether the next GC is young or mixed. |
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615 young_list_target_length = _young_list_fixed_length; |
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616 } |
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617 |
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618 // Make sure we don't go over the desired max length, nor under the |
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619 // desired min length. In case they clash, desired_min_length wins |
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620 // which is why that test is second. |
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621 if (young_list_target_length > desired_max_length) { |
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622 young_list_target_length = desired_max_length; |
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623 } |
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624 if (young_list_target_length < desired_min_length) { |
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625 young_list_target_length = desired_min_length; |
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626 } |
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627 |
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628 assert(young_list_target_length > recorded_survivor_regions(), |
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629 "we should be able to allocate at least one eden region"); |
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630 assert(young_list_target_length >= absolute_min_length, "post-condition"); |
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631 _young_list_target_length = young_list_target_length; |
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632 |
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633 update_max_gc_locker_expansion(); |
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634 } |
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635 |
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636 uint |
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637 G1CollectorPolicy::calculate_young_list_target_length(size_t rs_lengths, |
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638 uint base_min_length, |
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639 uint desired_min_length, |
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640 uint desired_max_length) { |
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641 assert(adaptive_young_list_length(), "pre-condition"); |
4710 | 642 assert(gcs_are_young(), "only call this for young GCs"); |
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643 |
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644 // In case some edge-condition makes the desired max length too small... |
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645 if (desired_max_length <= desired_min_length) { |
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646 return desired_min_length; |
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647 } |
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648 |
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649 // We'll adjust min_young_length and max_young_length not to include |
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650 // the already allocated young regions (i.e., so they reflect the |
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651 // min and max eden regions we'll allocate). The base_min_length |
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652 // will be reflected in the predictions by the |
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653 // survivor_regions_evac_time prediction. |
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654 assert(desired_min_length > base_min_length, "invariant"); |
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655 uint min_young_length = desired_min_length - base_min_length; |
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656 assert(desired_max_length > base_min_length, "invariant"); |
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657 uint max_young_length = desired_max_length - base_min_length; |
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658 |
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659 double target_pause_time_ms = _mmu_tracker->max_gc_time() * 1000.0; |
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660 double survivor_regions_evac_time = predict_survivor_regions_evac_time(); |
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661 size_t pending_cards = (size_t) get_new_prediction(_pending_cards_seq); |
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662 size_t adj_rs_lengths = rs_lengths + predict_rs_length_diff(); |
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663 size_t scanned_cards = predict_young_card_num(adj_rs_lengths); |
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664 double base_time_ms = |
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665 predict_base_elapsed_time_ms(pending_cards, scanned_cards) + |
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666 survivor_regions_evac_time; |
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667 uint available_free_regions = _free_regions_at_end_of_collection; |
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668 uint base_free_regions = 0; |
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669 if (available_free_regions > _reserve_regions) { |
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670 base_free_regions = available_free_regions - _reserve_regions; |
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671 } |
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672 |
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673 // Here, we will make sure that the shortest young length that |
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674 // makes sense fits within the target pause time. |
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675 |
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676 if (predict_will_fit(min_young_length, base_time_ms, |
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677 base_free_regions, target_pause_time_ms)) { |
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678 // The shortest young length will fit into the target pause time; |
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679 // we'll now check whether the absolute maximum number of young |
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680 // regions will fit in the target pause time. If not, we'll do |
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681 // a binary search between min_young_length and max_young_length. |
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682 if (predict_will_fit(max_young_length, base_time_ms, |
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683 base_free_regions, target_pause_time_ms)) { |
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684 // The maximum young length will fit into the target pause time. |
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685 // We are done so set min young length to the maximum length (as |
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686 // the result is assumed to be returned in min_young_length). |
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687 min_young_length = max_young_length; |
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688 } else { |
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689 // The maximum possible number of young regions will not fit within |
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690 // the target pause time so we'll search for the optimal |
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691 // length. The loop invariants are: |
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692 // |
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693 // min_young_length < max_young_length |
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694 // min_young_length is known to fit into the target pause time |
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695 // max_young_length is known not to fit into the target pause time |
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696 // |
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697 // Going into the loop we know the above hold as we've just |
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698 // checked them. Every time around the loop we check whether |
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699 // the middle value between min_young_length and |
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700 // max_young_length fits into the target pause time. If it |
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701 // does, it becomes the new min. If it doesn't, it becomes |
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702 // the new max. This way we maintain the loop invariants. |
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703 |
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704 assert(min_young_length < max_young_length, "invariant"); |
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705 uint diff = (max_young_length - min_young_length) / 2; |
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706 while (diff > 0) { |
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707 uint young_length = min_young_length + diff; |
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708 if (predict_will_fit(young_length, base_time_ms, |
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709 base_free_regions, target_pause_time_ms)) { |
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710 min_young_length = young_length; |
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711 } else { |
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712 max_young_length = young_length; |
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713 } |
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714 assert(min_young_length < max_young_length, "invariant"); |
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715 diff = (max_young_length - min_young_length) / 2; |
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716 } |
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717 // The results is min_young_length which, according to the |
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718 // loop invariants, should fit within the target pause time. |
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719 |
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720 // These are the post-conditions of the binary search above: |
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721 assert(min_young_length < max_young_length, |
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722 "otherwise we should have discovered that max_young_length " |
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723 "fits into the pause target and not done the binary search"); |
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724 assert(predict_will_fit(min_young_length, base_time_ms, |
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725 base_free_regions, target_pause_time_ms), |
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726 "min_young_length, the result of the binary search, should " |
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727 "fit into the pause target"); |
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728 assert(!predict_will_fit(min_young_length + 1, base_time_ms, |
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729 base_free_regions, target_pause_time_ms), |
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730 "min_young_length, the result of the binary search, should be " |
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731 "optimal, so no larger length should fit into the pause target"); |
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732 } |
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733 } else { |
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734 // Even the minimum length doesn't fit into the pause time |
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735 // target, return it as the result nevertheless. |
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736 } |
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737 return base_min_length + min_young_length; |
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738 } |
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739 |
545 | 740 double G1CollectorPolicy::predict_survivor_regions_evac_time() { |
741 double survivor_regions_evac_time = 0.0; | |
742 for (HeapRegion * r = _recorded_survivor_head; | |
743 r != NULL && r != _recorded_survivor_tail->get_next_young_region(); | |
744 r = r->get_next_young_region()) { | |
745 survivor_regions_evac_time += predict_region_elapsed_time_ms(r, true); | |
746 } | |
747 return survivor_regions_evac_time; | |
748 } | |
749 | |
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750 void G1CollectorPolicy::revise_young_list_target_length_if_necessary() { |
342 | 751 guarantee( adaptive_young_list_length(), "should not call this otherwise" ); |
752 | |
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753 size_t rs_lengths = _g1->young_list()->sampled_rs_lengths(); |
342 | 754 if (rs_lengths > _rs_lengths_prediction) { |
755 // add 10% to avoid having to recalculate often | |
756 size_t rs_lengths_prediction = rs_lengths * 1100 / 1000; | |
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757 update_young_list_target_length(rs_lengths_prediction); |
342 | 758 } |
759 } | |
760 | |
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761 |
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762 |
342 | 763 HeapWord* G1CollectorPolicy::mem_allocate_work(size_t size, |
764 bool is_tlab, | |
765 bool* gc_overhead_limit_was_exceeded) { | |
766 guarantee(false, "Not using this policy feature yet."); | |
767 return NULL; | |
768 } | |
769 | |
770 // This method controls how a collector handles one or more | |
771 // of its generations being fully allocated. | |
772 HeapWord* G1CollectorPolicy::satisfy_failed_allocation(size_t size, | |
773 bool is_tlab) { | |
774 guarantee(false, "Not using this policy feature yet."); | |
775 return NULL; | |
776 } | |
777 | |
778 | |
779 #ifndef PRODUCT | |
780 bool G1CollectorPolicy::verify_young_ages() { | |
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781 HeapRegion* head = _g1->young_list()->first_region(); |
342 | 782 return |
783 verify_young_ages(head, _short_lived_surv_rate_group); | |
784 // also call verify_young_ages on any additional surv rate groups | |
785 } | |
786 | |
787 bool | |
788 G1CollectorPolicy::verify_young_ages(HeapRegion* head, | |
789 SurvRateGroup *surv_rate_group) { | |
790 guarantee( surv_rate_group != NULL, "pre-condition" ); | |
791 | |
792 const char* name = surv_rate_group->name(); | |
793 bool ret = true; | |
794 int prev_age = -1; | |
795 | |
796 for (HeapRegion* curr = head; | |
797 curr != NULL; | |
798 curr = curr->get_next_young_region()) { | |
799 SurvRateGroup* group = curr->surv_rate_group(); | |
800 if (group == NULL && !curr->is_survivor()) { | |
801 gclog_or_tty->print_cr("## %s: encountered NULL surv_rate_group", name); | |
802 ret = false; | |
803 } | |
804 | |
805 if (surv_rate_group == group) { | |
806 int age = curr->age_in_surv_rate_group(); | |
807 | |
808 if (age < 0) { | |
809 gclog_or_tty->print_cr("## %s: encountered negative age", name); | |
810 ret = false; | |
811 } | |
812 | |
813 if (age <= prev_age) { | |
814 gclog_or_tty->print_cr("## %s: region ages are not strictly increasing " | |
815 "(%d, %d)", name, age, prev_age); | |
816 ret = false; | |
817 } | |
818 prev_age = age; | |
819 } | |
820 } | |
821 | |
822 return ret; | |
823 } | |
824 #endif // PRODUCT | |
825 | |
826 void G1CollectorPolicy::record_full_collection_start() { | |
827 _cur_collection_start_sec = os::elapsedTime(); | |
828 // Release the future to-space so that it is available for compaction into. | |
829 _g1->set_full_collection(); | |
830 } | |
831 | |
832 void G1CollectorPolicy::record_full_collection_end() { | |
833 // Consider this like a collection pause for the purposes of allocation | |
834 // since last pause. | |
835 double end_sec = os::elapsedTime(); | |
836 double full_gc_time_sec = end_sec - _cur_collection_start_sec; | |
837 double full_gc_time_ms = full_gc_time_sec * 1000.0; | |
838 | |
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839 _trace_gen1_time_data.record_full_collection(full_gc_time_ms); |
342 | 840 |
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841 update_recent_gc_times(end_sec, full_gc_time_ms); |
342 | 842 |
843 _g1->clear_full_collection(); | |
844 | |
4710 | 845 // "Nuke" the heuristics that control the young/mixed GC |
846 // transitions and make sure we start with young GCs after the Full GC. | |
847 set_gcs_are_young(true); | |
848 _last_young_gc = false; | |
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849 clear_initiate_conc_mark_if_possible(); |
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850 clear_during_initial_mark_pause(); |
342 | 851 _in_marking_window = false; |
852 _in_marking_window_im = false; | |
853 | |
854 _short_lived_surv_rate_group->start_adding_regions(); | |
855 // also call this on any additional surv rate groups | |
856 | |
545 | 857 record_survivor_regions(0, NULL, NULL); |
858 | |
342 | 859 _free_regions_at_end_of_collection = _g1->free_regions(); |
545 | 860 // Reset survivors SurvRateGroup. |
861 _survivor_surv_rate_group->reset(); | |
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862 update_young_list_target_length(); |
6011 | 863 _collectionSetChooser->clear(); |
1973 | 864 } |
342 | 865 |
866 void G1CollectorPolicy::record_stop_world_start() { | |
867 _stop_world_start = os::elapsedTime(); | |
868 } | |
869 | |
870 void G1CollectorPolicy::record_collection_pause_start(double start_time_sec, | |
871 size_t start_used) { | |
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872 if (G1Log::finer()) { |
342 | 873 gclog_or_tty->stamp(PrintGCTimeStamps); |
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874 gclog_or_tty->print("[%s", (const char*)GCCauseString("GC pause", _g1->gc_cause()) |
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875 .append(gcs_are_young() ? " (young)" : " (mixed)")); |
342 | 876 } |
877 | |
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878 // We only need to do this here as the policy will only be applied |
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879 // to the GC we're about to start. so, no point is calculating this |
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880 // every time we calculate / recalculate the target young length. |
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881 update_survivors_policy(); |
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882 |
1973 | 883 assert(_g1->used() == _g1->recalculate_used(), |
884 err_msg("sanity, used: "SIZE_FORMAT" recalculate_used: "SIZE_FORMAT, | |
885 _g1->used(), _g1->recalculate_used())); | |
342 | 886 |
887 double s_w_t_ms = (start_time_sec - _stop_world_start) * 1000.0; | |
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888 _trace_gen0_time_data.record_start_collection(s_w_t_ms); |
342 | 889 _stop_world_start = 0.0; |
890 | |
891 _cur_collection_start_sec = start_time_sec; | |
892 _cur_collection_pause_used_at_start_bytes = start_used; | |
893 _cur_collection_pause_used_regions_at_start = _g1->used_regions(); | |
894 _pending_cards = _g1->pending_card_num(); | |
895 _max_pending_cards = _g1->max_pending_card_num(); | |
896 | |
897 _bytes_in_collection_set_before_gc = 0; | |
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898 _bytes_copied_during_gc = 0; |
342 | 899 |
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900 YoungList* young_list = _g1->young_list(); |
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901 _eden_bytes_before_gc = young_list->eden_used_bytes(); |
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902 _survivor_bytes_before_gc = young_list->survivor_used_bytes(); |
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903 _capacity_before_gc = _g1->capacity(); |
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904 |
342 | 905 #ifdef DEBUG |
906 // initialise these to something well known so that we can spot | |
907 // if they are not set properly | |
908 | |
909 for (int i = 0; i < _parallel_gc_threads; ++i) { | |
1611 | 910 _par_last_gc_worker_start_times_ms[i] = -1234.0; |
911 _par_last_ext_root_scan_times_ms[i] = -1234.0; | |
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912 _par_last_satb_filtering_times_ms[i] = -1234.0; |
1611 | 913 _par_last_update_rs_times_ms[i] = -1234.0; |
914 _par_last_update_rs_processed_buffers[i] = -1234.0; | |
915 _par_last_scan_rs_times_ms[i] = -1234.0; | |
916 _par_last_obj_copy_times_ms[i] = -1234.0; | |
917 _par_last_termination_times_ms[i] = -1234.0; | |
918 _par_last_termination_attempts[i] = -1234.0; | |
919 _par_last_gc_worker_end_times_ms[i] = -1234.0; | |
2430 | 920 _par_last_gc_worker_times_ms[i] = -1234.0; |
4023 | 921 _par_last_gc_worker_other_times_ms[i] = -1234.0; |
342 | 922 } |
923 #endif | |
924 | |
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925 // This is initialized to zero here and is set during the evacuation |
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926 // pause if we actually waited for the root region scanning to finish. |
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927 _root_region_scan_wait_time_ms = 0.0; |
342 | 928 |
4710 | 929 _last_gc_was_young = false; |
342 | 930 |
931 // do that for any other surv rate groups | |
932 _short_lived_surv_rate_group->stop_adding_regions(); | |
1282 | 933 _survivors_age_table.clear(); |
545 | 934 |
342 | 935 assert( verify_young_ages(), "region age verification" ); |
936 } | |
937 | |
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938 void G1CollectorPolicy::record_concurrent_mark_init_end(double |
342 | 939 mark_init_elapsed_time_ms) { |
940 _during_marking = true; | |
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941 assert(!initiate_conc_mark_if_possible(), "we should have cleared it by now"); |
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942 clear_during_initial_mark_pause(); |
342 | 943 _cur_mark_stop_world_time_ms = mark_init_elapsed_time_ms; |
944 } | |
945 | |
946 void G1CollectorPolicy::record_concurrent_mark_remark_start() { | |
947 _mark_remark_start_sec = os::elapsedTime(); | |
948 _during_marking = false; | |
949 } | |
950 | |
951 void G1CollectorPolicy::record_concurrent_mark_remark_end() { | |
952 double end_time_sec = os::elapsedTime(); | |
953 double elapsed_time_ms = (end_time_sec - _mark_remark_start_sec)*1000.0; | |
954 _concurrent_mark_remark_times_ms->add(elapsed_time_ms); | |
955 _cur_mark_stop_world_time_ms += elapsed_time_ms; | |
956 _prev_collection_pause_end_ms += elapsed_time_ms; | |
957 | |
958 _mmu_tracker->add_pause(_mark_remark_start_sec, end_time_sec, true); | |
959 } | |
960 | |
961 void G1CollectorPolicy::record_concurrent_mark_cleanup_start() { | |
962 _mark_cleanup_start_sec = os::elapsedTime(); | |
963 } | |
964 | |
4013 | 965 void G1CollectorPolicy::record_concurrent_mark_cleanup_completed() { |
4710 | 966 _last_young_gc = true; |
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967 _in_marking_window = false; |
342 | 968 } |
969 | |
970 void G1CollectorPolicy::record_concurrent_pause() { | |
971 if (_stop_world_start > 0.0) { | |
972 double yield_ms = (os::elapsedTime() - _stop_world_start) * 1000.0; | |
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973 _trace_gen0_time_data.record_yield_time(yield_ms); |
342 | 974 } |
975 } | |
976 | |
977 void G1CollectorPolicy::record_concurrent_pause_end() { | |
978 } | |
979 | |
980 template<class T> | |
981 T sum_of(T* sum_arr, int start, int n, int N) { | |
982 T sum = (T)0; | |
983 for (int i = 0; i < n; i++) { | |
984 int j = (start + i) % N; | |
985 sum += sum_arr[j]; | |
986 } | |
987 return sum; | |
988 } | |
989 | |
1611 | 990 void G1CollectorPolicy::print_par_stats(int level, |
991 const char* str, | |
6059 | 992 double* data, |
993 bool showDecimals) { | |
342 | 994 double min = data[0], max = data[0]; |
995 double total = 0.0; | |
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996 LineBuffer buf(level); |
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997 buf.append("[%s (ms):", str); |
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998 for (uint i = 0; i < no_of_gc_threads(); ++i) { |
342 | 999 double val = data[i]; |
1000 if (val < min) | |
1001 min = val; | |
1002 if (val > max) | |
1003 max = val; | |
1004 total += val; | |
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1005 if (G1Log::finest()) { |
6059 | 1006 if (showDecimals) { |
1007 buf.append(" %.1lf", val); | |
1008 } else { | |
1009 buf.append(" %d", (int)val); | |
1010 } | |
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1011 } |
342 | 1012 } |
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1013 |
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1014 if (G1Log::finest()) { |
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1015 buf.append_and_print_cr(""); |
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1016 } |
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1017 double avg = total / (double) no_of_gc_threads(); |
6059 | 1018 if (showDecimals) { |
1019 buf.append_and_print_cr(" Min: %.1lf, Avg: %.1lf, Max: %.1lf, Diff: %.1lf, Sum: %.1lf]", | |
1020 min, avg, max, max - min, total); | |
1021 } else { | |
1022 buf.append_and_print_cr(" Min: %d, Avg: %d, Max: %d, Diff: %d, Sum: %d]", | |
1023 (int)min, (int)avg, (int)max, (int)max - (int)min, (int)total); | |
342 | 1024 } |
1025 } | |
1026 | |
4023 | 1027 void G1CollectorPolicy::print_stats(int level, |
1028 const char* str, | |
1029 double value) { | |
6059 | 1030 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value); |
1031 } | |
1032 | |
1033 void G1CollectorPolicy::print_stats(int level, | |
1034 const char* str, | |
1035 double value, | |
1036 int workers) { | |
1037 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %d]", str, value, workers); | |
342 | 1038 } |
1039 | |
4023 | 1040 void G1CollectorPolicy::print_stats(int level, |
1041 const char* str, | |
1042 int value) { | |
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1043 LineBuffer(level).append_and_print_cr("[%s: %d]", str, value); |
342 | 1044 } |
1045 | |
4023 | 1046 double G1CollectorPolicy::avg_value(double* data) { |
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1047 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 1048 double ret = 0.0; |
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1049 for (uint i = 0; i < no_of_gc_threads(); ++i) { |
342 | 1050 ret += data[i]; |
4023 | 1051 } |
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1052 return ret / (double) no_of_gc_threads(); |
342 | 1053 } else { |
1054 return data[0]; | |
1055 } | |
1056 } | |
1057 | |
4023 | 1058 double G1CollectorPolicy::max_value(double* data) { |
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1059 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 1060 double ret = data[0]; |
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1061 for (uint i = 1; i < no_of_gc_threads(); ++i) { |
4023 | 1062 if (data[i] > ret) { |
342 | 1063 ret = data[i]; |
4023 | 1064 } |
1065 } | |
342 | 1066 return ret; |
1067 } else { | |
1068 return data[0]; | |
1069 } | |
1070 } | |
1071 | |
4023 | 1072 double G1CollectorPolicy::sum_of_values(double* data) { |
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1073 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 1074 double sum = 0.0; |
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1075 for (uint i = 0; i < no_of_gc_threads(); i++) { |
342 | 1076 sum += data[i]; |
4023 | 1077 } |
342 | 1078 return sum; |
1079 } else { | |
1080 return data[0]; | |
1081 } | |
1082 } | |
1083 | |
4023 | 1084 double G1CollectorPolicy::max_sum(double* data1, double* data2) { |
342 | 1085 double ret = data1[0] + data2[0]; |
1086 | |
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1087 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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1088 for (uint i = 1; i < no_of_gc_threads(); ++i) { |
342 | 1089 double data = data1[i] + data2[i]; |
4023 | 1090 if (data > ret) { |
342 | 1091 ret = data; |
4023 | 1092 } |
342 | 1093 } |
1094 } | |
1095 return ret; | |
1096 } | |
1097 | |
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1098 bool G1CollectorPolicy::need_to_start_conc_mark(const char* source, size_t alloc_word_size) { |
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1099 if (_g1->concurrent_mark()->cmThread()->during_cycle()) { |
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1100 return false; |
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1101 } |
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1102 |
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1103 size_t marking_initiating_used_threshold = |
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1104 (_g1->capacity() / 100) * InitiatingHeapOccupancyPercent; |
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1105 size_t cur_used_bytes = _g1->non_young_capacity_bytes(); |
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1106 size_t alloc_byte_size = alloc_word_size * HeapWordSize; |
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1107 |
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1108 if ((cur_used_bytes + alloc_byte_size) > marking_initiating_used_threshold) { |
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1109 if (gcs_are_young()) { |
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1110 ergo_verbose5(ErgoConcCycles, |
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1111 "request concurrent cycle initiation", |
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1112 ergo_format_reason("occupancy higher than threshold") |
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1113 ergo_format_byte("occupancy") |
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1114 ergo_format_byte("allocation request") |
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1115 ergo_format_byte_perc("threshold") |
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1116 ergo_format_str("source"), |
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1117 cur_used_bytes, |
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1118 alloc_byte_size, |
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1119 marking_initiating_used_threshold, |
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1120 (double) InitiatingHeapOccupancyPercent, |
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1121 source); |
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1122 return true; |
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1123 } else { |
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1124 ergo_verbose5(ErgoConcCycles, |
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1125 "do not request concurrent cycle initiation", |
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1126 ergo_format_reason("still doing mixed collections") |
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1127 ergo_format_byte("occupancy") |
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1128 ergo_format_byte("allocation request") |
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1129 ergo_format_byte_perc("threshold") |
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1130 ergo_format_str("source"), |
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1131 cur_used_bytes, |
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1132 alloc_byte_size, |
4829
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1133 marking_initiating_used_threshold, |
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1134 (double) InitiatingHeapOccupancyPercent, |
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1135 source); |
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1136 } |
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1137 } |
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1138 |
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1139 return false; |
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1140 } |
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1141 |
342 | 1142 // Anything below that is considered to be zero |
1143 #define MIN_TIMER_GRANULARITY 0.0000001 | |
1144 | |
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1145 void G1CollectorPolicy::record_collection_pause_end(int no_of_gc_threads) { |
342 | 1146 double end_time_sec = os::elapsedTime(); |
1147 double elapsed_ms = _last_pause_time_ms; | |
1833
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1148 bool parallel = G1CollectedHeap::use_parallel_gc_threads(); |
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1149 assert(_cur_collection_pause_used_regions_at_start >= cset_region_length(), |
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1150 "otherwise, the subtraction below does not make sense"); |
342 | 1151 size_t rs_size = |
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1152 _cur_collection_pause_used_regions_at_start - cset_region_length(); |
342 | 1153 size_t cur_used_bytes = _g1->used(); |
1154 assert(cur_used_bytes == _g1->recalculate_used(), "It should!"); | |
1155 bool last_pause_included_initial_mark = false; | |
1707 | 1156 bool update_stats = !_g1->evacuation_failed(); |
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1157 set_no_of_gc_threads(no_of_gc_threads); |
342 | 1158 |
1159 #ifndef PRODUCT | |
1160 if (G1YoungSurvRateVerbose) { | |
1161 gclog_or_tty->print_cr(""); | |
1162 _short_lived_surv_rate_group->print(); | |
1163 // do that for any other surv rate groups too | |
1164 } | |
1165 #endif // PRODUCT | |
1166 | |
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1167 last_pause_included_initial_mark = during_initial_mark_pause(); |
4829
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1168 if (last_pause_included_initial_mark) { |
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1169 record_concurrent_mark_init_end(0.0); |
4912
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1170 } else if (!_last_young_gc && need_to_start_conc_mark("end of GC")) { |
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1171 // Note: this might have already been set, if during the last |
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1172 // pause we decided to start a cycle but at the beginning of |
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1173 // this pause we decided to postpone it. That's OK. |
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1174 set_initiate_conc_mark_if_possible(); |
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1175 } |
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1176 |
342 | 1177 _mmu_tracker->add_pause(end_time_sec - elapsed_ms/1000.0, |
1178 end_time_sec, false); | |
1179 | |
1180 size_t freed_bytes = | |
1181 _cur_collection_pause_used_at_start_bytes - cur_used_bytes; | |
1182 size_t surviving_bytes = _collection_set_bytes_used_before - freed_bytes; | |
1394
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1183 |
342 | 1184 double survival_fraction = |
1185 (double)surviving_bytes/ | |
1186 (double)_collection_set_bytes_used_before; | |
1187 | |
4023 | 1188 // These values are used to update the summary information that is |
1189 // displayed when TraceGen0Time is enabled, and are output as part | |
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1190 // of the "finer" output, in the non-parallel case. |
4023 | 1191 |
3823
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1192 double ext_root_scan_time = avg_value(_par_last_ext_root_scan_times_ms); |
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1193 double satb_filtering_time = avg_value(_par_last_satb_filtering_times_ms); |
3823
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1194 double update_rs_time = avg_value(_par_last_update_rs_times_ms); |
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1195 double update_rs_processed_buffers = |
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1196 sum_of_values(_par_last_update_rs_processed_buffers); |
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1197 double scan_rs_time = avg_value(_par_last_scan_rs_times_ms); |
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1198 double obj_copy_time = avg_value(_par_last_obj_copy_times_ms); |
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1199 double termination_time = avg_value(_par_last_termination_times_ms); |
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1200 |
4023 | 1201 double known_time = ext_root_scan_time + |
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1202 satb_filtering_time + |
4023 | 1203 update_rs_time + |
1204 scan_rs_time + | |
1205 obj_copy_time; | |
1206 | |
1207 double other_time_ms = elapsed_ms; | |
1208 | |
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1209 // Subtract the root region scanning wait time. It's initialized to |
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1210 // zero at the start of the pause. |
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1211 other_time_ms -= _root_region_scan_wait_time_ms; |
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1212 |
4023 | 1213 if (parallel) { |
1214 other_time_ms -= _cur_collection_par_time_ms; | |
1215 } else { | |
1216 other_time_ms -= known_time; | |
1217 } | |
1218 | |
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1219 // Now subtract the time taken to fix up roots in generated code |
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1220 other_time_ms -= _cur_collection_code_root_fixup_time_ms; |
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1221 |
4023 | 1222 // Subtract the time taken to clean the card table from the |
1223 // current value of "other time" | |
1224 other_time_ms -= _cur_clear_ct_time_ms; | |
1225 | |
1226 // TraceGen0Time and TraceGen1Time summary info updating. | |
3823
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1227 |
595
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1228 if (update_stats) { |
6109
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1229 double parallel_known_time = known_time + termination_time; |
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1230 double parallel_other_time = _cur_collection_par_time_ms - parallel_known_time; |
4023 | 1231 |
6109
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1232 _trace_gen0_time_data.record_end_collection( |
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1233 elapsed_ms, other_time_ms, _root_region_scan_wait_time_ms, _cur_collection_par_time_ms, |
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1234 ext_root_scan_time, satb_filtering_time, update_rs_time, scan_rs_time, obj_copy_time, |
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1235 termination_time, parallel_other_time, _cur_clear_ct_time_ms); |
4023 | 1236 |
342 | 1237 // this is where we update the allocation rate of the application |
1238 double app_time_ms = | |
1239 (_cur_collection_start_sec * 1000.0 - _prev_collection_pause_end_ms); | |
1240 if (app_time_ms < MIN_TIMER_GRANULARITY) { | |
1241 // This usually happens due to the timer not having the required | |
1242 // granularity. Some Linuxes are the usual culprits. | |
1243 // We'll just set it to something (arbitrarily) small. | |
1244 app_time_ms = 1.0; | |
1245 } | |
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1246 // We maintain the invariant that all objects allocated by mutator |
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1247 // threads will be allocated out of eden regions. So, we can use |
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1248 // the eden region number allocated since the previous GC to |
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1249 // calculate the application's allocate rate. The only exception |
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1250 // to that is humongous objects that are allocated separately. But |
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1251 // given that humongous object allocations do not really affect |
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1252 // either the pause's duration nor when the next pause will take |
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1253 // place we can safely ignore them here. |
6010
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1254 uint regions_allocated = eden_cset_region_length(); |
342 | 1255 double alloc_rate_ms = (double) regions_allocated / app_time_ms; |
1256 _alloc_rate_ms_seq->add(alloc_rate_ms); | |
1257 | |
1258 double interval_ms = | |
1259 (end_time_sec - _recent_prev_end_times_for_all_gcs_sec->oldest()) * 1000.0; | |
1260 update_recent_gc_times(end_time_sec, elapsed_ms); | |
1261 _recent_avg_pause_time_ratio = _recent_gc_times_ms->sum()/interval_ms; | |
1086
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1262 if (recent_avg_pause_time_ratio() < 0.0 || |
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1263 (recent_avg_pause_time_ratio() - 1.0 > 0.0)) { |
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1264 #ifndef PRODUCT |
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1265 // Dump info to allow post-facto debugging |
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|
1266 gclog_or_tty->print_cr("recent_avg_pause_time_ratio() out of bounds"); |
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|
1267 gclog_or_tty->print_cr("-------------------------------------------"); |
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1268 gclog_or_tty->print_cr("Recent GC Times (ms):"); |
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1269 _recent_gc_times_ms->dump(); |
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1270 gclog_or_tty->print_cr("(End Time=%3.3f) Recent GC End Times (s):", end_time_sec); |
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1271 _recent_prev_end_times_for_all_gcs_sec->dump(); |
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1272 gclog_or_tty->print_cr("GC = %3.3f, Interval = %3.3f, Ratio = %3.3f", |
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1273 _recent_gc_times_ms->sum(), interval_ms, recent_avg_pause_time_ratio()); |
1087
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1274 // In debug mode, terminate the JVM if the user wants to debug at this point. |
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1275 assert(!G1FailOnFPError, "Debugging data for CR 6898948 has been dumped above"); |
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1276 #endif // !PRODUCT |
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1277 // Clip ratio between 0.0 and 1.0, and continue. This will be fixed in |
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1278 // CR 6902692 by redoing the manner in which the ratio is incrementally computed. |
1086
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1279 if (_recent_avg_pause_time_ratio < 0.0) { |
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1280 _recent_avg_pause_time_ratio = 0.0; |
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1281 } else { |
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1282 assert(_recent_avg_pause_time_ratio - 1.0 > 0.0, "Ctl-point invariant"); |
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1283 _recent_avg_pause_time_ratio = 1.0; |
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1284 } |
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1285 } |
342 | 1286 } |
1287 | |
6007
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1288 if (G1Log::finer()) { |
4023 | 1289 bool print_marking_info = |
1290 _g1->mark_in_progress() && !last_pause_included_initial_mark; | |
1291 | |
1707 | 1292 gclog_or_tty->print_cr("%s, %1.8lf secs]", |
342 | 1293 (last_pause_included_initial_mark) ? " (initial-mark)" : "", |
1294 elapsed_ms / 1000.0); | |
1295 | |
4837
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1296 if (_root_region_scan_wait_time_ms > 0.0) { |
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1297 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms); |
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1298 } |
1707 | 1299 if (parallel) { |
6059 | 1300 print_stats(1, "Parallel Time", _cur_collection_par_time_ms, no_of_gc_threads); |
4023 | 1301 print_par_stats(2, "GC Worker Start", _par_last_gc_worker_start_times_ms); |
1302 print_par_stats(2, "Ext Root Scanning", _par_last_ext_root_scan_times_ms); | |
1303 if (print_marking_info) { | |
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1304 print_par_stats(2, "SATB Filtering", _par_last_satb_filtering_times_ms); |
4023 | 1305 } |
1707 | 1306 print_par_stats(2, "Update RS", _par_last_update_rs_times_ms); |
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1307 if (G1Log::finest()) { |
6059 | 1308 print_par_stats(3, "Processed Buffers", _par_last_update_rs_processed_buffers, |
1309 false /* showDecimals */); | |
6007
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1310 } |
1707 | 1311 print_par_stats(2, "Scan RS", _par_last_scan_rs_times_ms); |
1312 print_par_stats(2, "Object Copy", _par_last_obj_copy_times_ms); | |
1313 print_par_stats(2, "Termination", _par_last_termination_times_ms); | |
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1314 if (G1Log::finest()) { |
6059 | 1315 print_par_stats(3, "Termination Attempts", _par_last_termination_attempts, |
1316 false /* showDecimals */); | |
6007
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1317 } |
2430 | 1318 |
1319 for (int i = 0; i < _parallel_gc_threads; i++) { | |
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1320 _par_last_gc_worker_times_ms[i] = _par_last_gc_worker_end_times_ms[i] - |
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1321 _par_last_gc_worker_start_times_ms[i]; |
4023 | 1322 |
1323 double worker_known_time = _par_last_ext_root_scan_times_ms[i] + | |
4787
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1324 _par_last_satb_filtering_times_ms[i] + |
4023 | 1325 _par_last_update_rs_times_ms[i] + |
1326 _par_last_scan_rs_times_ms[i] + | |
1327 _par_last_obj_copy_times_ms[i] + | |
1328 _par_last_termination_times_ms[i]; | |
1329 | |
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1330 _par_last_gc_worker_other_times_ms[i] = _par_last_gc_worker_times_ms[i] - |
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1331 worker_known_time; |
2430 | 1332 } |
5986
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1333 |
4023 | 1334 print_par_stats(2, "GC Worker Other", _par_last_gc_worker_other_times_ms); |
5986
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1335 print_par_stats(2, "GC Worker Total", _par_last_gc_worker_times_ms); |
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1336 print_par_stats(2, "GC Worker End", _par_last_gc_worker_end_times_ms); |
1707 | 1337 } else { |
4023 | 1338 print_stats(1, "Ext Root Scanning", ext_root_scan_time); |
1339 if (print_marking_info) { | |
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1340 print_stats(1, "SATB Filtering", satb_filtering_time); |
4023 | 1341 } |
1707 | 1342 print_stats(1, "Update RS", update_rs_time); |
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1343 if (G1Log::finest()) { |
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1344 print_stats(2, "Processed Buffers", (int)update_rs_processed_buffers); |
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1345 } |
1707 | 1346 print_stats(1, "Scan RS", scan_rs_time); |
1347 print_stats(1, "Object Copying", obj_copy_time); | |
342 | 1348 } |
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1349 print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms); |
4023 | 1350 print_stats(1, "Clear CT", _cur_clear_ct_time_ms); |
890
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6819077: G1: first GC thread coming late into the GC.
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1351 #ifndef PRODUCT |
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1352 print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms); |
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1353 print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms); |
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1354 print_stats(1, "Min Clear CC", _min_clear_cc_time_ms); |
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1355 print_stats(1, "Max Clear CC", _max_clear_cc_time_ms); |
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1356 if (_num_cc_clears > 0) { |
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|
1357 print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears)); |
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1358 } |
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1359 #endif |
342 | 1360 print_stats(1, "Other", other_time_ms); |
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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1361 print_stats(2, "Choose CSet", |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
1362 (_recorded_young_cset_choice_time_ms + |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
1363 _recorded_non_young_cset_choice_time_ms)); |
3979
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6484982: G1: process references during evacuation pauses
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3976
diff
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1364 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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1365 print_stats(2, "Ref Enq", _cur_ref_enq_time_ms); |
4097
dc467e8b2c5e
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1366 print_stats(2, "Free CSet", |
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1367 (_recorded_young_free_cset_time_ms + |
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1368 _recorded_non_young_free_cset_time_ms)); |
342 | 1369 } |
1370 | |
1371 bool new_in_marking_window = _in_marking_window; | |
1372 bool new_in_marking_window_im = false; | |
1359
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6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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1373 if (during_initial_mark_pause()) { |
342 | 1374 new_in_marking_window = true; |
1375 new_in_marking_window_im = true; | |
1376 } | |
1377 | |
4710 | 1378 if (_last_young_gc) { |
4912
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1379 // This is supposed to to be the "last young GC" before we start |
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7132029: G1: mixed GC phase lasts for longer than it should
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1380 // doing mixed GCs. Here we decide whether to start mixed GCs or not. |
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1381 |
3982
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1382 if (!last_pause_included_initial_mark) { |
4912
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1383 if (next_gc_should_be_mixed("start mixed GCs", |
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1384 "do not start mixed GCs")) { |
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1385 set_gcs_are_young(false); |
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1386 } |
3982
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1387 } else { |
4710 | 1388 ergo_verbose0(ErgoMixedGCs, |
1389 "do not start mixed GCs", | |
3982
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1390 ergo_format_reason("concurrent cycle is about to start")); |
273b46400613
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1391 } |
4710 | 1392 _last_young_gc = false; |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
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1393 } |
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1394 |
4710 | 1395 if (!_last_gc_was_young) { |
4912
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1396 // This is a mixed GC. Here we decide whether to continue doing |
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1397 // mixed GCs or not. |
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|
1398 |
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1399 if (!next_gc_should_be_mixed("continue mixed GCs", |
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1400 "do not continue mixed GCs")) { |
4710 | 1401 set_gcs_are_young(true); |
342 | 1402 } |
3867
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1403 } |
4710 | 1404 |
342 | 1405 _short_lived_surv_rate_group->start_adding_regions(); |
1406 // do that for any other surv rate groupsx | |
1407 | |
677 | 1408 if (update_stats) { |
342 | 1409 double pause_time_ms = elapsed_ms; |
1410 | |
1411 size_t diff = 0; | |
6010
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1412 if (_max_pending_cards >= _pending_cards) { |
342 | 1413 diff = _max_pending_cards - _pending_cards; |
6010
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1414 } |
342 | 1415 _pending_card_diff_seq->add((double) diff); |
1416 | |
1417 double cost_per_card_ms = 0.0; | |
1418 if (_pending_cards > 0) { | |
1419 cost_per_card_ms = update_rs_time / (double) _pending_cards; | |
1420 _cost_per_card_ms_seq->add(cost_per_card_ms); | |
1421 } | |
1422 | |
1423 size_t cards_scanned = _g1->cards_scanned(); | |
1424 | |
1425 double cost_per_entry_ms = 0.0; | |
1426 if (cards_scanned > 10) { | |
1427 cost_per_entry_ms = scan_rs_time / (double) cards_scanned; | |
4710 | 1428 if (_last_gc_was_young) { |
342 | 1429 _cost_per_entry_ms_seq->add(cost_per_entry_ms); |
4710 | 1430 } else { |
1431 _mixed_cost_per_entry_ms_seq->add(cost_per_entry_ms); | |
1432 } | |
342 | 1433 } |
1434 | |
1435 if (_max_rs_lengths > 0) { | |
1436 double cards_per_entry_ratio = | |
1437 (double) cards_scanned / (double) _max_rs_lengths; | |
4710 | 1438 if (_last_gc_was_young) { |
1439 _young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio); | |
1440 } else { | |
1441 _mixed_cards_per_entry_ratio_seq->add(cards_per_entry_ratio); | |
1442 } | |
342 | 1443 } |
1444 | |
4727
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1445 // This is defensive. For a while _max_rs_lengths could get |
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1446 // smaller than _recorded_rs_lengths which was causing |
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1447 // rs_length_diff to get very large and mess up the RSet length |
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1448 // predictions. The reason was unsafe concurrent updates to the |
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1449 // _inc_cset_recorded_rs_lengths field which the code below guards |
67fdcb391461
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1450 // against (see CR 7118202). This bug has now been fixed (see CR |
67fdcb391461
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1451 // 7119027). However, I'm still worried that |
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1452 // _inc_cset_recorded_rs_lengths might still end up somewhat |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
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1453 // inaccurate. The concurrent refinement thread calculates an |
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1454 // RSet's length concurrently with other CR threads updating it |
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1455 // which might cause it to calculate the length incorrectly (if, |
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1456 // say, it's in mid-coarsening). So I'll leave in the defensive |
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1457 // conditional below just in case. |
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1458 size_t rs_length_diff = 0; |
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1459 if (_max_rs_lengths > _recorded_rs_lengths) { |
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1460 rs_length_diff = _max_rs_lengths - _recorded_rs_lengths; |
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1461 } |
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1462 _rs_length_diff_seq->add((double) rs_length_diff); |
342 | 1463 |
1464 size_t copied_bytes = surviving_bytes; | |
1465 double cost_per_byte_ms = 0.0; | |
1466 if (copied_bytes > 0) { | |
1467 cost_per_byte_ms = obj_copy_time / (double) copied_bytes; | |
4710 | 1468 if (_in_marking_window) { |
342 | 1469 _cost_per_byte_ms_during_cm_seq->add(cost_per_byte_ms); |
4710 | 1470 } else { |
342 | 1471 _cost_per_byte_ms_seq->add(cost_per_byte_ms); |
4710 | 1472 } |
342 | 1473 } |
1474 | |
1475 double all_other_time_ms = pause_time_ms - | |
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1476 (update_rs_time + scan_rs_time + obj_copy_time + termination_time); |
342 | 1477 |
1478 double young_other_time_ms = 0.0; | |
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1479 if (young_cset_region_length() > 0) { |
342 | 1480 young_other_time_ms = |
1481 _recorded_young_cset_choice_time_ms + | |
1482 _recorded_young_free_cset_time_ms; | |
1483 _young_other_cost_per_region_ms_seq->add(young_other_time_ms / | |
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1484 (double) young_cset_region_length()); |
342 | 1485 } |
1486 double non_young_other_time_ms = 0.0; | |
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1487 if (old_cset_region_length() > 0) { |
342 | 1488 non_young_other_time_ms = |
1489 _recorded_non_young_cset_choice_time_ms + | |
1490 _recorded_non_young_free_cset_time_ms; | |
1491 | |
1492 _non_young_other_cost_per_region_ms_seq->add(non_young_other_time_ms / | |
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1493 (double) old_cset_region_length()); |
342 | 1494 } |
1495 | |
1496 double constant_other_time_ms = all_other_time_ms - | |
1497 (young_other_time_ms + non_young_other_time_ms); | |
1498 _constant_other_time_ms_seq->add(constant_other_time_ms); | |
1499 | |
1500 double survival_ratio = 0.0; | |
1501 if (_bytes_in_collection_set_before_gc > 0) { | |
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1502 survival_ratio = (double) _bytes_copied_during_gc / |
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1503 (double) _bytes_in_collection_set_before_gc; |
342 | 1504 } |
1505 | |
1506 _pending_cards_seq->add((double) _pending_cards); | |
1507 _rs_lengths_seq->add((double) _max_rs_lengths); | |
1508 } | |
1509 | |
1510 _in_marking_window = new_in_marking_window; | |
1511 _in_marking_window_im = new_in_marking_window_im; | |
1512 _free_regions_at_end_of_collection = _g1->free_regions(); | |
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1513 update_young_list_target_length(); |
342 | 1514 |
1111 | 1515 // Note that _mmu_tracker->max_gc_time() returns the time in seconds. |
1282 | 1516 double update_rs_time_goal_ms = _mmu_tracker->max_gc_time() * MILLIUNITS * G1RSetUpdatingPauseTimePercent / 100.0; |
1111 | 1517 adjust_concurrent_refinement(update_rs_time, update_rs_processed_buffers, update_rs_time_goal_ms); |
4013 | 1518 |
6011 | 1519 _collectionSetChooser->verify(); |
342 | 1520 } |
1521 | |
6059 | 1522 #define EXT_SIZE_FORMAT "%.1f%s" |
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1523 #define EXT_SIZE_PARAMS(bytes) \ |
6059 | 1524 byte_size_in_proper_unit((double)(bytes)), \ |
3764
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1525 proper_unit_for_byte_size((bytes)) |
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1526 |
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1527 void G1CollectorPolicy::print_heap_transition() { |
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1528 if (G1Log::finer()) { |
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1529 YoungList* young_list = _g1->young_list(); |
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1530 size_t eden_bytes = young_list->eden_used_bytes(); |
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1531 size_t survivor_bytes = young_list->survivor_used_bytes(); |
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1532 size_t used_before_gc = _cur_collection_pause_used_at_start_bytes; |
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1533 size_t used = _g1->used(); |
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1534 size_t capacity = _g1->capacity(); |
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1535 size_t eden_capacity = |
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1536 (_young_list_target_length * HeapRegion::GrainBytes) - survivor_bytes; |
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1537 |
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1538 gclog_or_tty->print_cr( |
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1539 " [Eden: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->"EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT") " |
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1540 "Survivors: "EXT_SIZE_FORMAT"->"EXT_SIZE_FORMAT" " |
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1541 "Heap: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->" |
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1542 EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")]", |
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1543 EXT_SIZE_PARAMS(_eden_bytes_before_gc), |
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1544 EXT_SIZE_PARAMS(_prev_eden_capacity), |
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1545 EXT_SIZE_PARAMS(eden_bytes), |
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1546 EXT_SIZE_PARAMS(eden_capacity), |
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1547 EXT_SIZE_PARAMS(_survivor_bytes_before_gc), |
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1548 EXT_SIZE_PARAMS(survivor_bytes), |
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1549 EXT_SIZE_PARAMS(used_before_gc), |
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1550 EXT_SIZE_PARAMS(_capacity_before_gc), |
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1551 EXT_SIZE_PARAMS(used), |
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1552 EXT_SIZE_PARAMS(capacity)); |
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1553 |
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1554 _prev_eden_capacity = eden_capacity; |
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1555 } else if (G1Log::fine()) { |
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1556 _g1->print_size_transition(gclog_or_tty, |
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1557 _cur_collection_pause_used_at_start_bytes, |
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1558 _g1->used(), _g1->capacity()); |
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1559 } |
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1560 } |
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1561 |
1111 | 1562 void G1CollectorPolicy::adjust_concurrent_refinement(double update_rs_time, |
1563 double update_rs_processed_buffers, | |
1564 double goal_ms) { | |
1565 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
1566 ConcurrentG1Refine *cg1r = G1CollectedHeap::heap()->concurrent_g1_refine(); | |
1567 | |
1282 | 1568 if (G1UseAdaptiveConcRefinement) { |
1111 | 1569 const int k_gy = 3, k_gr = 6; |
1570 const double inc_k = 1.1, dec_k = 0.9; | |
1571 | |
1572 int g = cg1r->green_zone(); | |
1573 if (update_rs_time > goal_ms) { | |
1574 g = (int)(g * dec_k); // Can become 0, that's OK. That would mean a mutator-only processing. | |
1575 } else { | |
1576 if (update_rs_time < goal_ms && update_rs_processed_buffers > g) { | |
1577 g = (int)MAX2(g * inc_k, g + 1.0); | |
1578 } | |
1579 } | |
1580 // Change the refinement threads params | |
1581 cg1r->set_green_zone(g); | |
1582 cg1r->set_yellow_zone(g * k_gy); | |
1583 cg1r->set_red_zone(g * k_gr); | |
1584 cg1r->reinitialize_threads(); | |
1585 | |
1586 int processing_threshold_delta = MAX2((int)(cg1r->green_zone() * sigma()), 1); | |
1587 int processing_threshold = MIN2(cg1r->green_zone() + processing_threshold_delta, | |
1588 cg1r->yellow_zone()); | |
1589 // Change the barrier params | |
1590 dcqs.set_process_completed_threshold(processing_threshold); | |
1591 dcqs.set_max_completed_queue(cg1r->red_zone()); | |
1592 } | |
1593 | |
1594 int curr_queue_size = dcqs.completed_buffers_num(); | |
1595 if (curr_queue_size >= cg1r->yellow_zone()) { | |
1596 dcqs.set_completed_queue_padding(curr_queue_size); | |
1597 } else { | |
1598 dcqs.set_completed_queue_padding(0); | |
1599 } | |
1600 dcqs.notify_if_necessary(); | |
1601 } | |
1602 | |
342 | 1603 double |
1604 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards) { | |
1605 size_t rs_length = predict_rs_length_diff(); | |
1606 size_t card_num; | |
4710 | 1607 if (gcs_are_young()) { |
342 | 1608 card_num = predict_young_card_num(rs_length); |
4710 | 1609 } else { |
342 | 1610 card_num = predict_non_young_card_num(rs_length); |
4710 | 1611 } |
342 | 1612 return predict_base_elapsed_time_ms(pending_cards, card_num); |
1613 } | |
1614 | |
1615 double | |
1616 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards, | |
1617 size_t scanned_cards) { | |
1618 return | |
1619 predict_rs_update_time_ms(pending_cards) + | |
1620 predict_rs_scan_time_ms(scanned_cards) + | |
1621 predict_constant_other_time_ms(); | |
1622 } | |
1623 | |
1624 double | |
1625 G1CollectorPolicy::predict_region_elapsed_time_ms(HeapRegion* hr, | |
1626 bool young) { | |
1627 size_t rs_length = hr->rem_set()->occupied(); | |
1628 size_t card_num; | |
4710 | 1629 if (gcs_are_young()) { |
342 | 1630 card_num = predict_young_card_num(rs_length); |
4710 | 1631 } else { |
342 | 1632 card_num = predict_non_young_card_num(rs_length); |
4710 | 1633 } |
342 | 1634 size_t bytes_to_copy = predict_bytes_to_copy(hr); |
1635 | |
1636 double region_elapsed_time_ms = | |
1637 predict_rs_scan_time_ms(card_num) + | |
1638 predict_object_copy_time_ms(bytes_to_copy); | |
1639 | |
1640 if (young) | |
1641 region_elapsed_time_ms += predict_young_other_time_ms(1); | |
1642 else | |
1643 region_elapsed_time_ms += predict_non_young_other_time_ms(1); | |
1644 | |
1645 return region_elapsed_time_ms; | |
1646 } | |
1647 | |
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1648 size_t G1CollectorPolicy::predict_bytes_to_copy(HeapRegion* hr) { |
342 | 1649 size_t bytes_to_copy; |
1650 if (hr->is_marked()) | |
1651 bytes_to_copy = hr->max_live_bytes(); | |
1652 else { | |
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1653 assert(hr->is_young() && hr->age_in_surv_rate_group() != -1, "invariant"); |
342 | 1654 int age = hr->age_in_surv_rate_group(); |
545 | 1655 double yg_surv_rate = predict_yg_surv_rate(age, hr->surv_rate_group()); |
342 | 1656 bytes_to_copy = (size_t) ((double) hr->used() * yg_surv_rate); |
1657 } | |
1658 return bytes_to_copy; | |
1659 } | |
1660 | |
1661 void | |
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1662 G1CollectorPolicy::init_cset_region_lengths(uint eden_cset_region_length, |
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1663 uint survivor_cset_region_length) { |
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1664 _eden_cset_region_length = eden_cset_region_length; |
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1665 _survivor_cset_region_length = survivor_cset_region_length; |
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1666 _old_cset_region_length = 0; |
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1667 } |
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1668 |
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1669 void G1CollectorPolicy::set_recorded_rs_lengths(size_t rs_lengths) { |
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1670 _recorded_rs_lengths = rs_lengths; |
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1671 } |
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1672 |
342 | 1673 void G1CollectorPolicy::update_recent_gc_times(double end_time_sec, |
1674 double elapsed_ms) { | |
1675 _recent_gc_times_ms->add(elapsed_ms); | |
1676 _recent_prev_end_times_for_all_gcs_sec->add(end_time_sec); | |
1677 _prev_collection_pause_end_ms = end_time_sec * 1000.0; | |
1678 } | |
1679 | |
1680 size_t G1CollectorPolicy::expansion_amount() { | |
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1681 double recent_gc_overhead = recent_avg_pause_time_ratio() * 100.0; |
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1682 double threshold = _gc_overhead_perc; |
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1683 if (recent_gc_overhead > threshold) { |
751 | 1684 // We will double the existing space, or take |
1685 // G1ExpandByPercentOfAvailable % of the available expansion | |
1686 // space, whichever is smaller, bounded below by a minimum | |
1687 // expansion (unless that's all that's left.) | |
342 | 1688 const size_t min_expand_bytes = 1*M; |
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1689 size_t reserved_bytes = _g1->max_capacity(); |
342 | 1690 size_t committed_bytes = _g1->capacity(); |
1691 size_t uncommitted_bytes = reserved_bytes - committed_bytes; | |
1692 size_t expand_bytes; | |
1693 size_t expand_bytes_via_pct = | |
751 | 1694 uncommitted_bytes * G1ExpandByPercentOfAvailable / 100; |
342 | 1695 expand_bytes = MIN2(expand_bytes_via_pct, committed_bytes); |
1696 expand_bytes = MAX2(expand_bytes, min_expand_bytes); | |
1697 expand_bytes = MIN2(expand_bytes, uncommitted_bytes); | |
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1698 |
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1699 ergo_verbose5(ErgoHeapSizing, |
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1700 "attempt heap expansion", |
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1701 ergo_format_reason("recent GC overhead higher than " |
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1702 "threshold after GC") |
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1703 ergo_format_perc("recent GC overhead") |
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1704 ergo_format_perc("threshold") |
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1705 ergo_format_byte("uncommitted") |
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1706 ergo_format_byte_perc("calculated expansion amount"), |
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1707 recent_gc_overhead, threshold, |
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1708 uncommitted_bytes, |
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1709 expand_bytes_via_pct, (double) G1ExpandByPercentOfAvailable); |
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1710 |
342 | 1711 return expand_bytes; |
1712 } else { | |
1713 return 0; | |
1714 } | |
1715 } | |
1716 | |
1717 class CountCSClosure: public HeapRegionClosure { | |
1718 G1CollectorPolicy* _g1_policy; | |
1719 public: | |
1720 CountCSClosure(G1CollectorPolicy* g1_policy) : | |
1721 _g1_policy(g1_policy) {} | |
1722 bool doHeapRegion(HeapRegion* r) { | |
1723 _g1_policy->_bytes_in_collection_set_before_gc += r->used(); | |
1724 return false; | |
1725 } | |
1726 }; | |
1727 | |
1728 void G1CollectorPolicy::count_CS_bytes_used() { | |
1729 CountCSClosure cs_closure(this); | |
1730 _g1->collection_set_iterate(&cs_closure); | |
1731 } | |
1732 | |
1733 void G1CollectorPolicy::print_tracing_info() const { | |
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1734 _trace_gen0_time_data.print(); |
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1735 _trace_gen1_time_data.print(); |
342 | 1736 } |
1737 | |
1738 void G1CollectorPolicy::print_yg_surv_rate_info() const { | |
1739 #ifndef PRODUCT | |
1740 _short_lived_surv_rate_group->print_surv_rate_summary(); | |
1741 // add this call for any other surv rate groups | |
1742 #endif // PRODUCT | |
1743 } | |
1744 | |
1745 #ifndef PRODUCT | |
1746 // for debugging, bit of a hack... | |
1747 static char* | |
1748 region_num_to_mbs(int length) { | |
1749 static char buffer[64]; | |
1750 double bytes = (double) (length * HeapRegion::GrainBytes); | |
1751 double mbs = bytes / (double) (1024 * 1024); | |
1752 sprintf(buffer, "%7.2lfMB", mbs); | |
1753 return buffer; | |
1754 } | |
1755 #endif // PRODUCT | |
1756 | |
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1757 uint G1CollectorPolicy::max_regions(int purpose) { |
342 | 1758 switch (purpose) { |
1759 case GCAllocForSurvived: | |
545 | 1760 return _max_survivor_regions; |
342 | 1761 case GCAllocForTenured: |
545 | 1762 return REGIONS_UNLIMITED; |
342 | 1763 default: |
545 | 1764 ShouldNotReachHere(); |
1765 return REGIONS_UNLIMITED; | |
342 | 1766 }; |
1767 } | |
1768 | |
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1769 void G1CollectorPolicy::update_max_gc_locker_expansion() { |
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1770 uint expansion_region_num = 0; |
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1771 if (GCLockerEdenExpansionPercent > 0) { |
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1772 double perc = (double) GCLockerEdenExpansionPercent / 100.0; |
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1773 double expansion_region_num_d = perc * (double) _young_list_target_length; |
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1774 // We use ceiling so that if expansion_region_num_d is > 0.0 (but |
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1775 // less than 1.0) we'll get 1. |
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1776 expansion_region_num = (uint) ceil(expansion_region_num_d); |
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1777 } else { |
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1778 assert(expansion_region_num == 0, "sanity"); |
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1779 } |
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1780 _young_list_max_length = _young_list_target_length + expansion_region_num; |
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1781 assert(_young_list_target_length <= _young_list_max_length, "post-condition"); |
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1782 } |
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1783 |
545 | 1784 // Calculates survivor space parameters. |
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1785 void G1CollectorPolicy::update_survivors_policy() { |
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1786 double max_survivor_regions_d = |
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1787 (double) _young_list_target_length / (double) SurvivorRatio; |
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1788 // We use ceiling so that if max_survivor_regions_d is > 0.0 (but |
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1789 // smaller than 1.0) we'll get 1. |
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1790 _max_survivor_regions = (uint) ceil(max_survivor_regions_d); |
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1791 |
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1792 _tenuring_threshold = _survivors_age_table.compute_tenuring_threshold( |
545 | 1793 HeapRegion::GrainWords * _max_survivor_regions); |
1794 } | |
1795 | |
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1796 bool G1CollectorPolicy::force_initial_mark_if_outside_cycle( |
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1797 GCCause::Cause gc_cause) { |
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1798 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle(); |
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1799 if (!during_cycle) { |
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1800 ergo_verbose1(ErgoConcCycles, |
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1801 "request concurrent cycle initiation", |
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1802 ergo_format_reason("requested by GC cause") |
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1803 ergo_format_str("GC cause"), |
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1804 GCCause::to_string(gc_cause)); |
1656
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1805 set_initiate_conc_mark_if_possible(); |
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1806 return true; |
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1807 } else { |
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1808 ergo_verbose1(ErgoConcCycles, |
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1809 "do not request concurrent cycle initiation", |
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1810 ergo_format_reason("concurrent cycle already in progress") |
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1811 ergo_format_str("GC cause"), |
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1812 GCCause::to_string(gc_cause)); |
1656
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1813 return false; |
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1814 } |
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1815 } |
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1816 |
342 | 1817 void |
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1818 G1CollectorPolicy::decide_on_conc_mark_initiation() { |
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1819 // We are about to decide on whether this pause will be an |
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1820 // initial-mark pause. |
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1821 |
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1822 // First, during_initial_mark_pause() should not be already set. We |
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1823 // will set it here if we have to. However, it should be cleared by |
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1824 // the end of the pause (it's only set for the duration of an |
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1825 // initial-mark pause). |
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1826 assert(!during_initial_mark_pause(), "pre-condition"); |
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1827 |
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1828 if (initiate_conc_mark_if_possible()) { |
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1829 // We had noticed on a previous pause that the heap occupancy has |
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1830 // gone over the initiating threshold and we should start a |
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1831 // concurrent marking cycle. So we might initiate one. |
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1832 |
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1833 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle(); |
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1834 if (!during_cycle) { |
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1835 // The concurrent marking thread is not "during a cycle", i.e., |
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1836 // it has completed the last one. So we can go ahead and |
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1837 // initiate a new cycle. |
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1838 |
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1839 set_during_initial_mark_pause(); |
4710 | 1840 // We do not allow mixed GCs during marking. |
1841 if (!gcs_are_young()) { | |
1842 set_gcs_are_young(true); | |
1843 ergo_verbose0(ErgoMixedGCs, | |
1844 "end mixed GCs", | |
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1845 ergo_format_reason("concurrent cycle is about to start")); |
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1846 } |
1359
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1847 |
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1848 // And we can now clear initiate_conc_mark_if_possible() as |
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1849 // we've already acted on it. |
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1850 clear_initiate_conc_mark_if_possible(); |
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1851 |
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1852 ergo_verbose0(ErgoConcCycles, |
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1853 "initiate concurrent cycle", |
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1854 ergo_format_reason("concurrent cycle initiation requested")); |
1359
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1855 } else { |
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1856 // The concurrent marking thread is still finishing up the |
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1857 // previous cycle. If we start one right now the two cycles |
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1858 // overlap. In particular, the concurrent marking thread might |
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1859 // be in the process of clearing the next marking bitmap (which |
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1860 // we will use for the next cycle if we start one). Starting a |
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1861 // cycle now will be bad given that parts of the marking |
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1862 // information might get cleared by the marking thread. And we |
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1863 // cannot wait for the marking thread to finish the cycle as it |
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1864 // periodically yields while clearing the next marking bitmap |
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1865 // and, if it's in a yield point, it's waiting for us to |
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1866 // finish. So, at this point we will not start a cycle and we'll |
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1867 // let the concurrent marking thread complete the last one. |
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1868 ergo_verbose0(ErgoConcCycles, |
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1869 "do not initiate concurrent cycle", |
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1870 ergo_format_reason("concurrent cycle already in progress")); |
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1871 } |
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1872 } |
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1873 } |
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1874 |
342 | 1875 class KnownGarbageClosure: public HeapRegionClosure { |
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1876 G1CollectedHeap* _g1h; |
342 | 1877 CollectionSetChooser* _hrSorted; |
1878 | |
1879 public: | |
1880 KnownGarbageClosure(CollectionSetChooser* hrSorted) : | |
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1881 _g1h(G1CollectedHeap::heap()), _hrSorted(hrSorted) { } |
342 | 1882 |
1883 bool doHeapRegion(HeapRegion* r) { | |
1884 // We only include humongous regions in collection | |
1885 // sets when concurrent mark shows that their contained object is | |
1886 // unreachable. | |
1887 | |
1888 // Do we have any marking information for this region? | |
1889 if (r->is_marked()) { | |
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1890 // We will skip any region that's currently used as an old GC |
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1891 // alloc region (we should not consider those for collection |
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1892 // before we fill them up). |
6011 | 1893 if (_hrSorted->should_add(r) && !_g1h->is_old_gc_alloc_region(r)) { |
1894 _hrSorted->add_region(r); | |
342 | 1895 } |
1896 } | |
1897 return false; | |
1898 } | |
1899 }; | |
1900 | |
1901 class ParKnownGarbageHRClosure: public HeapRegionClosure { | |
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1902 G1CollectedHeap* _g1h; |
342 | 1903 CollectionSetChooser* _hrSorted; |
6011 | 1904 uint _marked_regions_added; |
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1905 size_t _reclaimable_bytes_added; |
6011 | 1906 uint _chunk_size; |
1907 uint _cur_chunk_idx; | |
1908 uint _cur_chunk_end; // Cur chunk [_cur_chunk_idx, _cur_chunk_end) | |
342 | 1909 |
1910 void get_new_chunk() { | |
6011 | 1911 _cur_chunk_idx = _hrSorted->claim_array_chunk(_chunk_size); |
342 | 1912 _cur_chunk_end = _cur_chunk_idx + _chunk_size; |
1913 } | |
1914 void add_region(HeapRegion* r) { | |
1915 if (_cur_chunk_idx == _cur_chunk_end) { | |
1916 get_new_chunk(); | |
1917 } | |
1918 assert(_cur_chunk_idx < _cur_chunk_end, "postcondition"); | |
6011 | 1919 _hrSorted->set_region(_cur_chunk_idx, r); |
342 | 1920 _marked_regions_added++; |
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1921 _reclaimable_bytes_added += r->reclaimable_bytes(); |
342 | 1922 _cur_chunk_idx++; |
1923 } | |
1924 | |
1925 public: | |
1926 ParKnownGarbageHRClosure(CollectionSetChooser* hrSorted, | |
6011 | 1927 uint chunk_size) : |
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1928 _g1h(G1CollectedHeap::heap()), |
6011 | 1929 _hrSorted(hrSorted), _chunk_size(chunk_size), |
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1930 _marked_regions_added(0), _reclaimable_bytes_added(0), |
6011 | 1931 _cur_chunk_idx(0), _cur_chunk_end(0) { } |
342 | 1932 |
1933 bool doHeapRegion(HeapRegion* r) { | |
1934 // Do we have any marking information for this region? | |
1935 if (r->is_marked()) { | |
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1936 // We will skip any region that's currently used as an old GC |
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1937 // alloc region (we should not consider those for collection |
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1938 // before we fill them up). |
6011 | 1939 if (_hrSorted->should_add(r) && !_g1h->is_old_gc_alloc_region(r)) { |
342 | 1940 add_region(r); |
1941 } | |
1942 } | |
1943 return false; | |
1944 } | |
6011 | 1945 uint marked_regions_added() { return _marked_regions_added; } |
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1946 size_t reclaimable_bytes_added() { return _reclaimable_bytes_added; } |
342 | 1947 }; |
1948 | |
1949 class ParKnownGarbageTask: public AbstractGangTask { | |
1950 CollectionSetChooser* _hrSorted; | |
6011 | 1951 uint _chunk_size; |
342 | 1952 G1CollectedHeap* _g1; |
1953 public: | |
6011 | 1954 ParKnownGarbageTask(CollectionSetChooser* hrSorted, uint chunk_size) : |
342 | 1955 AbstractGangTask("ParKnownGarbageTask"), |
1956 _hrSorted(hrSorted), _chunk_size(chunk_size), | |
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1957 _g1(G1CollectedHeap::heap()) { } |
342 | 1958 |
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1959 void work(uint worker_id) { |
6011 | 1960 ParKnownGarbageHRClosure parKnownGarbageCl(_hrSorted, _chunk_size); |
1961 | |
342 | 1962 // Back to zero for the claim value. |
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1963 _g1->heap_region_par_iterate_chunked(&parKnownGarbageCl, worker_id, |
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1964 _g1->workers()->active_workers(), |
355 | 1965 HeapRegion::InitialClaimValue); |
6011 | 1966 uint regions_added = parKnownGarbageCl.marked_regions_added(); |
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1967 size_t reclaimable_bytes_added = |
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1968 parKnownGarbageCl.reclaimable_bytes_added(); |
6011 | 1969 _hrSorted->update_totals(regions_added, reclaimable_bytes_added); |
342 | 1970 } |
1971 }; | |
1972 | |
1973 void | |
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1974 G1CollectorPolicy::record_concurrent_mark_cleanup_end(int no_of_gc_threads) { |
6011 | 1975 _collectionSetChooser->clear(); |
4013 | 1976 |
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1977 uint region_num = _g1->n_regions(); |
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1978 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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1979 const uint OverpartitionFactor = 4; |
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1980 uint WorkUnit; |
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1981 // The use of MinChunkSize = 8 in the original code |
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1982 // causes some assertion failures when the total number of |
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1983 // region is less than 8. The code here tries to fix that. |
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1984 // Should the original code also be fixed? |
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1985 if (no_of_gc_threads > 0) { |
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1986 const uint MinWorkUnit = MAX2(region_num / no_of_gc_threads, 1U); |
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1987 WorkUnit = MAX2(region_num / (no_of_gc_threads * OverpartitionFactor), |
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1988 MinWorkUnit); |
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1989 } else { |
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1990 assert(no_of_gc_threads > 0, |
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1991 "The active gc workers should be greater than 0"); |
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1992 // In a product build do something reasonable to avoid a crash. |
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1993 const uint MinWorkUnit = MAX2(region_num / (uint) ParallelGCThreads, 1U); |
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1994 WorkUnit = |
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1995 MAX2(region_num / (uint) (ParallelGCThreads * OverpartitionFactor), |
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1996 MinWorkUnit); |
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1997 } |
6011 | 1998 _collectionSetChooser->prepare_for_par_region_addition(_g1->n_regions(), |
1999 WorkUnit); | |
342 | 2000 ParKnownGarbageTask parKnownGarbageTask(_collectionSetChooser, |
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2001 (int) WorkUnit); |
342 | 2002 _g1->workers()->run_task(&parKnownGarbageTask); |
355 | 2003 |
2004 assert(_g1->check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
2005 "sanity check"); | |
342 | 2006 } else { |
2007 KnownGarbageClosure knownGarbagecl(_collectionSetChooser); | |
2008 _g1->heap_region_iterate(&knownGarbagecl); | |
2009 } | |
4013 | 2010 |
6011 | 2011 _collectionSetChooser->sort_regions(); |
2012 | |
4013 | 2013 double end_sec = os::elapsedTime(); |
2014 double elapsed_time_ms = (end_sec - _mark_cleanup_start_sec) * 1000.0; | |
2015 _concurrent_mark_cleanup_times_ms->add(elapsed_time_ms); | |
2016 _cur_mark_stop_world_time_ms += elapsed_time_ms; | |
2017 _prev_collection_pause_end_ms += elapsed_time_ms; | |
2018 _mmu_tracker->add_pause(_mark_cleanup_start_sec, end_sec, true); | |
342 | 2019 } |
2020 | |
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2021 // Add the heap region at the head of the non-incremental collection set |
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2022 void G1CollectorPolicy::add_old_region_to_cset(HeapRegion* hr) { |
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2023 assert(_inc_cset_build_state == Active, "Precondition"); |
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2024 assert(!hr->is_young(), "non-incremental add of young region"); |
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2025 |
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2026 assert(!hr->in_collection_set(), "should not already be in the CSet"); |
342 | 2027 hr->set_in_collection_set(true); |
2028 hr->set_next_in_collection_set(_collection_set); | |
2029 _collection_set = hr; | |
2030 _collection_set_bytes_used_before += hr->used(); | |
526 | 2031 _g1->register_region_with_in_cset_fast_test(hr); |
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2032 size_t rs_length = hr->rem_set()->occupied(); |
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2033 _recorded_rs_lengths += rs_length; |
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2034 _old_cset_region_length += 1; |
342 | 2035 } |
2036 | |
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2037 // Initialize the per-collection-set information |
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2038 void G1CollectorPolicy::start_incremental_cset_building() { |
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2039 assert(_inc_cset_build_state == Inactive, "Precondition"); |
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2040 |
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2041 _inc_cset_head = NULL; |
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2042 _inc_cset_tail = NULL; |
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2043 _inc_cset_bytes_used_before = 0; |
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2044 |
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2045 _inc_cset_max_finger = 0; |
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2046 _inc_cset_recorded_rs_lengths = 0; |
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2047 _inc_cset_recorded_rs_lengths_diffs = 0; |
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2048 _inc_cset_predicted_elapsed_time_ms = 0.0; |
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2049 _inc_cset_predicted_elapsed_time_ms_diffs = 0.0; |
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2050 _inc_cset_build_state = Active; |
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2051 } |
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2052 |
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2053 void G1CollectorPolicy::finalize_incremental_cset_building() { |
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2054 assert(_inc_cset_build_state == Active, "Precondition"); |
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2055 assert(SafepointSynchronize::is_at_safepoint(), "should be at a safepoint"); |
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2056 |
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2057 // The two "main" fields, _inc_cset_recorded_rs_lengths and |
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2058 // _inc_cset_predicted_elapsed_time_ms, are updated by the thread |
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2059 // that adds a new region to the CSet. Further updates by the |
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2060 // concurrent refinement thread that samples the young RSet lengths |
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2061 // are accumulated in the *_diffs fields. Here we add the diffs to |
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|
2062 // the "main" fields. |
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|
2063 |
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|
2064 if (_inc_cset_recorded_rs_lengths_diffs >= 0) { |
67fdcb391461
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|
2065 _inc_cset_recorded_rs_lengths += _inc_cset_recorded_rs_lengths_diffs; |
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|
2066 } else { |
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|
2067 // This is defensive. The diff should in theory be always positive |
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|
2068 // as RSets can only grow between GCs. However, given that we |
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|
2069 // sample their size concurrently with other threads updating them |
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2070 // it's possible that we might get the wrong size back, which |
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|
2071 // could make the calculations somewhat inaccurate. |
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2072 size_t diffs = (size_t) (-_inc_cset_recorded_rs_lengths_diffs); |
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2073 if (_inc_cset_recorded_rs_lengths >= diffs) { |
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2074 _inc_cset_recorded_rs_lengths -= diffs; |
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|
2075 } else { |
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|
2076 _inc_cset_recorded_rs_lengths = 0; |
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|
2077 } |
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|
2078 } |
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2079 _inc_cset_predicted_elapsed_time_ms += |
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2080 _inc_cset_predicted_elapsed_time_ms_diffs; |
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|
2081 |
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2082 _inc_cset_recorded_rs_lengths_diffs = 0; |
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2083 _inc_cset_predicted_elapsed_time_ms_diffs = 0.0; |
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|
2084 } |
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|
2085 |
1394
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2086 void G1CollectorPolicy::add_to_incremental_cset_info(HeapRegion* hr, size_t rs_length) { |
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2087 // This routine is used when: |
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2088 // * adding survivor regions to the incremental cset at the end of an |
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|
2089 // evacuation pause, |
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2090 // * adding the current allocation region to the incremental cset |
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|
2091 // when it is retired, and |
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2092 // * updating existing policy information for a region in the |
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|
2093 // incremental cset via young list RSet sampling. |
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|
2094 // Therefore this routine may be called at a safepoint by the |
1316cec51b4d
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|
2095 // VM thread, or in-between safepoints by mutator threads (when |
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|
2096 // retiring the current allocation region) or a concurrent |
1316cec51b4d
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|
2097 // refine thread (RSet sampling). |
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|
2098 |
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|
2099 double region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, true); |
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|
2100 size_t used_bytes = hr->used(); |
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|
2101 _inc_cset_recorded_rs_lengths += rs_length; |
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|
2102 _inc_cset_predicted_elapsed_time_ms += region_elapsed_time_ms; |
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|
2103 _inc_cset_bytes_used_before += used_bytes; |
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|
2104 |
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|
2105 // Cache the values we have added to the aggregated informtion |
1316cec51b4d
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|
2106 // in the heap region in case we have to remove this region from |
1316cec51b4d
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|
2107 // the incremental collection set, or it is updated by the |
1316cec51b4d
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|
2108 // rset sampling code |
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|
2109 hr->set_recorded_rs_length(rs_length); |
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|
2110 hr->set_predicted_elapsed_time_ms(region_elapsed_time_ms); |
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|
2111 } |
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|
2112 |
4727
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|
2113 void G1CollectorPolicy::update_incremental_cset_info(HeapRegion* hr, |
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|
2114 size_t new_rs_length) { |
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2115 // Update the CSet information that is dependent on the new RS length |
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|
2116 assert(hr->is_young(), "Precondition"); |
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|
2117 assert(!SafepointSynchronize::is_at_safepoint(), |
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|
2118 "should not be at a safepoint"); |
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|
2119 |
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|
2120 // We could have updated _inc_cset_recorded_rs_lengths and |
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|
2121 // _inc_cset_predicted_elapsed_time_ms directly but we'd need to do |
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|
2122 // that atomically, as this code is executed by a concurrent |
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|
2123 // refinement thread, potentially concurrently with a mutator thread |
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|
2124 // allocating a new region and also updating the same fields. To |
67fdcb391461
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|
2125 // avoid the atomic operations we accumulate these updates on two |
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|
2126 // separate fields (*_diffs) and we'll just add them to the "main" |
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|
2127 // fields at the start of a GC. |
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|
2128 |
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|
2129 ssize_t old_rs_length = (ssize_t) hr->recorded_rs_length(); |
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|
2130 ssize_t rs_lengths_diff = (ssize_t) new_rs_length - old_rs_length; |
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|
2131 _inc_cset_recorded_rs_lengths_diffs += rs_lengths_diff; |
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|
2132 |
1394
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|
2133 double old_elapsed_time_ms = hr->predicted_elapsed_time_ms(); |
4727
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|
2134 double new_region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, true); |
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|
2135 double elapsed_ms_diff = new_region_elapsed_time_ms - old_elapsed_time_ms; |
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|
2136 _inc_cset_predicted_elapsed_time_ms_diffs += elapsed_ms_diff; |
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|
2137 |
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|
2138 hr->set_recorded_rs_length(new_rs_length); |
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|
2139 hr->set_predicted_elapsed_time_ms(new_region_elapsed_time_ms); |
1394
1316cec51b4d
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diff
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|
2140 } |
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diff
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|
2141 |
1316cec51b4d
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|
2142 void G1CollectorPolicy::add_region_to_incremental_cset_common(HeapRegion* hr) { |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
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4072
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|
2143 assert(hr->is_young(), "invariant"); |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
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4072
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|
2144 assert(hr->young_index_in_cset() > -1, "should have already been set"); |
1394
1316cec51b4d
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diff
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|
2145 assert(_inc_cset_build_state == Active, "Precondition"); |
1316cec51b4d
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diff
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|
2146 |
1316cec51b4d
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diff
changeset
|
2147 // We need to clear and set the cached recorded/cached collection set |
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diff
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|
2148 // information in the heap region here (before the region gets added |
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|
2149 // to the collection set). An individual heap region's cached values |
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|
2150 // are calculated, aggregated with the policy collection set info, |
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|
2151 // and cached in the heap region here (initially) and (subsequently) |
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|
2152 // by the Young List sampling code. |
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|
2153 |
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|
2154 size_t rs_length = hr->rem_set()->occupied(); |
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|
2155 add_to_incremental_cset_info(hr, rs_length); |
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|
2156 |
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diff
changeset
|
2157 HeapWord* hr_end = hr->end(); |
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|
2158 _inc_cset_max_finger = MAX2(_inc_cset_max_finger, hr_end); |
1316cec51b4d
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diff
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|
2159 |
1316cec51b4d
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diff
changeset
|
2160 assert(!hr->in_collection_set(), "invariant"); |
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|
2161 hr->set_in_collection_set(true); |
1316cec51b4d
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diff
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|
2162 assert( hr->next_in_collection_set() == NULL, "invariant"); |
1316cec51b4d
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diff
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|
2163 |
1316cec51b4d
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diff
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|
2164 _g1->register_region_with_in_cset_fast_test(hr); |
1316cec51b4d
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diff
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|
2165 } |
1316cec51b4d
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diff
changeset
|
2166 |
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diff
changeset
|
2167 // Add the region at the RHS of the incremental cset |
1316cec51b4d
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diff
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|
2168 void G1CollectorPolicy::add_region_to_incremental_cset_rhs(HeapRegion* hr) { |
1316cec51b4d
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|
2169 // We should only ever be appending survivors at the end of a pause |
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diff
changeset
|
2170 assert( hr->is_survivor(), "Logic"); |
1316cec51b4d
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diff
changeset
|
2171 |
1316cec51b4d
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diff
changeset
|
2172 // Do the 'common' stuff |
1316cec51b4d
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diff
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|
2173 add_region_to_incremental_cset_common(hr); |
1316cec51b4d
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diff
changeset
|
2174 |
1316cec51b4d
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diff
changeset
|
2175 // Now add the region at the right hand side |
1316cec51b4d
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parents:
1391
diff
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|
2176 if (_inc_cset_tail == NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
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|
2177 assert(_inc_cset_head == NULL, "invariant"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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|
2178 _inc_cset_head = hr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
2179 } else { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
changeset
|
2180 _inc_cset_tail->set_next_in_collection_set(hr); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
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|
2181 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
changeset
|
2182 _inc_cset_tail = hr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
2183 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2184 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
1391
diff
changeset
|
2185 // 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
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|
2186 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
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|
2187 // 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
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parents:
1391
diff
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|
2188 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
|
2189 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2190 // Do the 'common' stuff |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2191 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
|
2192 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2193 // 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
|
2194 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
|
2195 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
|
2196 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
|
2197 _inc_cset_tail = hr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2198 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2199 _inc_cset_head = hr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2200 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2201 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2202 #ifndef PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2203 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
|
2204 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
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parents:
1391
diff
changeset
|
2205 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2206 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
|
2207 HeapRegion* csr = list_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2208 while (csr != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2209 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
|
2210 assert(csr->in_collection_set(), "bad CS"); |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
2211 st->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
2212 HR_FORMAT_PARAMS(csr), |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
2213 csr->prev_top_at_mark_start(), csr->next_top_at_mark_start(), |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
2214 csr->age_in_surv_rate_group_cond()); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2215 csr = next; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2216 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2217 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2218 #endif // !PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2219 |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2220 bool G1CollectorPolicy::next_gc_should_be_mixed(const char* true_action_str, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
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|
2221 const char* false_action_str) { |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
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|
2222 CollectionSetChooser* cset_chooser = _collectionSetChooser; |
6011 | 2223 if (cset_chooser->is_empty()) { |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2224 ergo_verbose0(ErgoMixedGCs, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2225 false_action_str, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2226 ergo_format_reason("candidate old regions not available")); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2227 return false; |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2228 } |
6011 | 2229 size_t reclaimable_bytes = cset_chooser->remaining_reclaimable_bytes(); |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2230 size_t capacity_bytes = _g1->capacity(); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2231 double perc = (double) reclaimable_bytes * 100.0 / (double) capacity_bytes; |
5964
21595f05bc93
7146246: G1: expose some of the -XX flags that drive which old regions to collect during mixed GCs
tonyp
parents:
4912
diff
changeset
|
2232 double threshold = (double) G1HeapWastePercent; |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2233 if (perc < threshold) { |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2234 ergo_verbose4(ErgoMixedGCs, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2235 false_action_str, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2236 ergo_format_reason("reclaimable percentage lower than threshold") |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2237 ergo_format_region("candidate old regions") |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2238 ergo_format_byte_perc("reclaimable") |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2239 ergo_format_perc("threshold"), |
6011 | 2240 cset_chooser->remaining_regions(), |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2241 reclaimable_bytes, perc, threshold); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2242 return false; |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2243 } |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2244 |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2245 ergo_verbose4(ErgoMixedGCs, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2246 true_action_str, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2247 ergo_format_reason("candidate old regions available") |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2248 ergo_format_region("candidate old regions") |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2249 ergo_format_byte_perc("reclaimable") |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2250 ergo_format_perc("threshold"), |
6011 | 2251 cset_chooser->remaining_regions(), |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2252 reclaimable_bytes, perc, threshold); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2253 return true; |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2254 } |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2255 |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
2256 void G1CollectorPolicy::finalize_cset(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
|
2257 // 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
|
2258 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
|
2259 |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2260 YoungList* young_list = _g1->young_list(); |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
2261 finalize_incremental_cset_building(); |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2262 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2263 guarantee(target_pause_time_ms > 0.0, |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2264 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
|
2265 target_pause_time_ms)); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2266 guarantee(_collection_set == NULL, "Precondition"); |
342 | 2267 |
2268 double base_time_ms = predict_base_elapsed_time_ms(_pending_cards); | |
2269 double predicted_pause_time_ms = base_time_ms; | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2270 double time_remaining_ms = target_pause_time_ms - base_time_ms; |
342 | 2271 |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2272 ergo_verbose3(ErgoCSetConstruction | ErgoHigh, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2273 "start choosing CSet", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2274 ergo_format_ms("predicted base time") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2275 ergo_format_ms("remaining time") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2276 ergo_format_ms("target pause time"), |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2277 base_time_ms, time_remaining_ms, target_pause_time_ms); |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2278 |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2279 HeapRegion* hr; |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2280 double young_start_time_sec = os::elapsedTime(); |
342 | 2281 |
677 | 2282 _collection_set_bytes_used_before = 0; |
4710 | 2283 _last_gc_was_young = gcs_are_young() ? true : false; |
2284 | |
2285 if (_last_gc_was_young) { | |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2286 _trace_gen0_time_data.increment_young_collection_count(); |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2287 } else { |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2288 _trace_gen0_time_data.increment_mixed_collection_count(); |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2289 } |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2290 |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2291 // 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
|
2292 // 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
|
2293 // [Newly Young Regions ++ Survivors from last pause]. |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2294 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6007
diff
changeset
|
2295 uint survivor_region_length = young_list->survivor_length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6007
diff
changeset
|
2296 uint eden_region_length = young_list->length() - survivor_region_length; |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4072
diff
changeset
|
2297 init_cset_region_lengths(eden_region_length, survivor_region_length); |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2298 hr = young_list->first_survivor_region(); |
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2299 while (hr != NULL) { |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2300 assert(hr->is_survivor(), "badly formed young list"); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2301 hr->set_young(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2302 hr = hr->get_next_young_region(); |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
2303 } |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
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|
2304 |
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7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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2305 // Clear the fields that point to the survivor list - they are all young now. |
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7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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2306 young_list->clear_survivors(); |
3867
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6814390: G1: remove the concept of non-generational G1
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|
2307 |
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6814390: G1: remove the concept of non-generational G1
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|
2308 _collection_set = _inc_cset_head; |
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2309 _collection_set_bytes_used_before = _inc_cset_bytes_used_before; |
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2310 time_remaining_ms -= _inc_cset_predicted_elapsed_time_ms; |
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2311 predicted_pause_time_ms += _inc_cset_predicted_elapsed_time_ms; |
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|
2312 |
3914
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7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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|
2313 ergo_verbose3(ErgoCSetConstruction | ErgoHigh, |
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7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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|
2314 "add young regions to CSet", |
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7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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|
2315 ergo_format_region("eden") |
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|
2316 ergo_format_region("survivors") |
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|
2317 ergo_format_ms("predicted young region time"), |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4072
diff
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|
2318 eden_region_length, survivor_region_length, |
3914
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|
2319 _inc_cset_predicted_elapsed_time_ms); |
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|
2320 |
3867
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2321 // The number of recorded young regions is the incremental |
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|
2322 // collection set's current size |
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|
2323 set_recorded_rs_lengths(_inc_cset_recorded_rs_lengths); |
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|
2324 |
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6814390: G1: remove the concept of non-generational G1
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|
2325 double young_end_time_sec = os::elapsedTime(); |
ff53346271fe
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2326 _recorded_young_cset_choice_time_ms = |
ff53346271fe
6814390: G1: remove the concept of non-generational G1
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|
2327 (young_end_time_sec - young_start_time_sec) * 1000.0; |
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|
2328 |
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|
2329 // We are doing young collections so reset this. |
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|
2330 non_young_start_time_sec = young_end_time_sec; |
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|
2331 |
4710 | 2332 if (!gcs_are_young()) { |
4912
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2333 CollectionSetChooser* cset_chooser = _collectionSetChooser; |
6011 | 2334 cset_chooser->verify(); |
2335 const uint min_old_cset_length = cset_chooser->calc_min_old_cset_length(); | |
2336 const uint max_old_cset_length = cset_chooser->calc_max_old_cset_length(); | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6007
diff
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|
2337 |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
2338 uint expensive_region_num = 0; |
4912
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|
2339 bool check_time_remaining = adaptive_young_list_length(); |
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|
2340 HeapRegion* hr = cset_chooser->peek(); |
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|
2341 while (hr != NULL) { |
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|
2342 if (old_cset_region_length() >= max_old_cset_length) { |
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|
2343 // Added maximum number of old regions to the CSet. |
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|
2344 ergo_verbose2(ErgoCSetConstruction, |
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|
2345 "finish adding old regions to CSet", |
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|
2346 ergo_format_reason("old CSet region num reached max") |
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|
2347 ergo_format_region("old") |
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|
2348 ergo_format_region("max"), |
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|
2349 old_cset_region_length(), max_old_cset_length); |
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|
2350 break; |
342 | 2351 } |
3914
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|
2352 |
4912
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|
2353 double predicted_time_ms = predict_region_elapsed_time_ms(hr, false); |
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|
2354 if (check_time_remaining) { |
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|
2355 if (predicted_time_ms > time_remaining_ms) { |
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|
2356 // Too expensive for the current CSet. |
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|
2357 |
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|
2358 if (old_cset_region_length() >= min_old_cset_length) { |
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2359 // We have added the minimum number of old regions to the CSet, |
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|
2360 // we are done with this CSet. |
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|
2361 ergo_verbose4(ErgoCSetConstruction, |
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|
2362 "finish adding old regions to CSet", |
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|
2363 ergo_format_reason("predicted time is too high") |
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|
2364 ergo_format_ms("predicted time") |
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|
2365 ergo_format_ms("remaining time") |
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|
2366 ergo_format_region("old") |
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|
2367 ergo_format_region("min"), |
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|
2368 predicted_time_ms, time_remaining_ms, |
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|
2369 old_cset_region_length(), min_old_cset_length); |
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|
2370 break; |
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|
2371 } |
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|
2372 |
a9647476d1a4
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|
2373 // We'll add it anyway given that we haven't reached the |
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|
2374 // minimum number of old regions. |
a9647476d1a4
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|
2375 expensive_region_num += 1; |
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|
2376 } |
3914
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|
2377 } else { |
4912
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|
2378 if (old_cset_region_length() >= min_old_cset_length) { |
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|
2379 // In the non-auto-tuning case, we'll finish adding regions |
a9647476d1a4
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|
2380 // to the CSet if we reach the minimum. |
a9647476d1a4
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|
2381 ergo_verbose2(ErgoCSetConstruction, |
a9647476d1a4
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diff
changeset
|
2382 "finish adding old regions to CSet", |
a9647476d1a4
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|
2383 ergo_format_reason("old CSet region num reached min") |
a9647476d1a4
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4837
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|
2384 ergo_format_region("old") |
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|
2385 ergo_format_region("min"), |
a9647476d1a4
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|
2386 old_cset_region_length(), min_old_cset_length); |
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|
2387 break; |
3914
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|
2388 } |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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diff
changeset
|
2389 } |
4912
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diff
changeset
|
2390 |
a9647476d1a4
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|
2391 // We will add this region to the CSet. |
a9647476d1a4
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|
2392 time_remaining_ms -= predicted_time_ms; |
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|
2393 predicted_pause_time_ms += predicted_time_ms; |
a9647476d1a4
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|
2394 cset_chooser->remove_and_move_to_next(hr); |
a9647476d1a4
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|
2395 _g1->old_set_remove(hr); |
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|
2396 add_old_region_to_cset(hr); |
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|
2397 |
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|
2398 hr = cset_chooser->peek(); |
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|
2399 } |
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|
2400 if (hr == NULL) { |
a9647476d1a4
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changeset
|
2401 ergo_verbose0(ErgoCSetConstruction, |
a9647476d1a4
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4837
diff
changeset
|
2402 "finish adding old regions to CSet", |
a9647476d1a4
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diff
changeset
|
2403 ergo_format_reason("candidate old regions not available")); |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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3868
diff
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|
2404 } |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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diff
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|
2405 |
4912
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|
2406 if (expensive_region_num > 0) { |
a9647476d1a4
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|
2407 // We print the information once here at the end, predicated on |
a9647476d1a4
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|
2408 // whether we added any apparently expensive regions or not, to |
a9647476d1a4
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diff
changeset
|
2409 // avoid generating output per region. |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
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changeset
|
2410 ergo_verbose4(ErgoCSetConstruction, |
a9647476d1a4
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4837
diff
changeset
|
2411 "added expensive regions to CSet", |
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changeset
|
2412 ergo_format_reason("old CSet region num not reached min") |
a9647476d1a4
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4837
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changeset
|
2413 ergo_format_region("old") |
a9647476d1a4
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diff
changeset
|
2414 ergo_format_region("expensive") |
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changeset
|
2415 ergo_format_region("min") |
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changeset
|
2416 ergo_format_ms("remaining time"), |
a9647476d1a4
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changeset
|
2417 old_cset_region_length(), |
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diff
changeset
|
2418 expensive_region_num, |
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changeset
|
2419 min_old_cset_length, |
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changeset
|
2420 time_remaining_ms); |
a9647476d1a4
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changeset
|
2421 } |
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|
2422 |
6011 | 2423 cset_chooser->verify(); |
342 | 2424 } |
2425 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2426 stop_incremental_cset_building(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2427 |
342 | 2428 count_CS_bytes_used(); |
2429 | |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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3868
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|
2430 ergo_verbose5(ErgoCSetConstruction, |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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3868
diff
changeset
|
2431 "finish choosing CSet", |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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3868
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|
2432 ergo_format_region("eden") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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3868
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|
2433 ergo_format_region("survivors") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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3868
diff
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|
2434 ergo_format_region("old") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2435 ergo_format_ms("predicted pause time") |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2436 ergo_format_ms("target pause time"), |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4072
diff
changeset
|
2437 eden_region_length, survivor_region_length, |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4072
diff
changeset
|
2438 old_cset_region_length(), |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2439 predicted_pause_time_ms, target_pause_time_ms); |
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
2440 |
342 | 2441 double non_young_end_time_sec = os::elapsedTime(); |
2442 _recorded_non_young_cset_choice_time_ms = | |
2443 (non_young_end_time_sec - non_young_start_time_sec) * 1000.0; | |
2444 } | |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2445 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2446 void TraceGen0TimeData::record_start_collection(double time_to_stop_the_world_ms) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2447 if(TraceGen0Time) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2448 _all_stop_world_times_ms.add(time_to_stop_the_world_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2449 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2450 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2451 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2452 void TraceGen0TimeData::record_yield_time(double yield_time_ms) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2453 if(TraceGen0Time) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2454 _all_yield_times_ms.add(yield_time_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2455 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2456 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2457 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2458 void TraceGen0TimeData::record_end_collection( |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2459 double total_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2460 double other_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2461 double root_region_scan_wait_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2462 double parallel_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2463 double ext_root_scan_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2464 double satb_filtering_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2465 double update_rs_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2466 double scan_rs_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2467 double obj_copy_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2468 double termination_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2469 double parallel_other_ms, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2470 double clear_ct_ms) |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2471 { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2472 if(TraceGen0Time) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2473 _total.add(total_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2474 _other.add(other_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2475 _root_region_scan_wait.add(root_region_scan_wait_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2476 _parallel.add(parallel_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2477 _ext_root_scan.add(ext_root_scan_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2478 _satb_filtering.add(satb_filtering_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2479 _update_rs.add(update_rs_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2480 _scan_rs.add(scan_rs_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2481 _obj_copy.add(obj_copy_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2482 _termination.add(termination_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2483 _parallel_other.add(parallel_other_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2484 _clear_ct.add(clear_ct_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2485 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2486 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2487 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2488 void TraceGen0TimeData::increment_young_collection_count() { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2489 if(TraceGen0Time) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2490 ++_young_pause_num; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2491 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2492 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2493 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2494 void TraceGen0TimeData::increment_mixed_collection_count() { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2495 if(TraceGen0Time) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2496 ++_mixed_pause_num; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2497 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2498 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2499 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2500 void TraceGen0TimeData::print_summary(int level, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2501 const char* str, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2502 const NumberSeq* seq) const { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2503 double sum = seq->sum(); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2504 LineBuffer(level + 1).append_and_print_cr("%-24s = %8.2lf s (avg = %8.2lf ms)", |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2505 str, sum / 1000.0, seq->avg()); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2506 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2507 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2508 void TraceGen0TimeData::print_summary_sd(int level, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2509 const char* str, |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2510 const NumberSeq* seq) const { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2511 print_summary(level, str, seq); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2512 LineBuffer(level + 6).append_and_print_cr("(num = %5d, std dev = %8.2lf ms, max = %8.2lf ms)", |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2513 seq->num(), seq->sd(), seq->maximum()); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2514 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2515 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2516 void TraceGen0TimeData::print() const { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2517 if (!TraceGen0Time) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2518 return; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2519 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2520 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2521 gclog_or_tty->print_cr("ALL PAUSES"); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2522 print_summary_sd(0, "Total", &_total); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2523 gclog_or_tty->print_cr(""); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2524 gclog_or_tty->print_cr(""); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2525 gclog_or_tty->print_cr(" Young GC Pauses: %8d", _young_pause_num); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2526 gclog_or_tty->print_cr(" Mixed GC Pauses: %8d", _mixed_pause_num); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2527 gclog_or_tty->print_cr(""); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2528 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2529 gclog_or_tty->print_cr("EVACUATION PAUSES"); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2530 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2531 if (_young_pause_num == 0 && _mixed_pause_num == 0) { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2532 gclog_or_tty->print_cr("none"); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2533 } else { |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2534 print_summary_sd(0, "Evacuation Pauses", &_total); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2535 print_summary(1, "Root Region Scan Wait", &_root_region_scan_wait); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2536 print_summary(1, "Parallel Time", &_parallel); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2537 print_summary(2, "Ext Root Scanning", &_ext_root_scan); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2538 print_summary(2, "SATB Filtering", &_satb_filtering); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2539 print_summary(2, "Update RS", &_update_rs); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2540 print_summary(2, "Scan RS", &_scan_rs); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2541 print_summary(2, "Object Copy", &_obj_copy); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2542 print_summary(2, "Termination", &_termination); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2543 print_summary(2, "Parallel Other", &_parallel_other); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2544 print_summary(1, "Clear CT", &_clear_ct); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2545 print_summary(1, "Other", &_other); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2546 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2547 gclog_or_tty->print_cr(""); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2548 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2549 gclog_or_tty->print_cr("MISC"); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2550 print_summary_sd(0, "Stop World", &_all_stop_world_times_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2551 print_summary_sd(0, "Yields", &_all_yield_times_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2552 } |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6064
diff
changeset
|
2553 |
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2554 void TraceGen1TimeData::record_full_collection(double full_gc_time_ms) { |
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2555 if (TraceGen1Time) { |
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2556 _all_full_gc_times.add(full_gc_time_ms); |
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2557 } |
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2558 } |
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2559 |
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2560 void TraceGen1TimeData::print() const { |
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2561 if (!TraceGen1Time) { |
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2562 return; |
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2563 } |
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2564 |
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2565 if (_all_full_gc_times.num() > 0) { |
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2566 gclog_or_tty->print("\n%4d full_gcs: total time = %8.2f s", |
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2567 _all_full_gc_times.num(), |
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2568 _all_full_gc_times.sum() / 1000.0); |
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2569 gclog_or_tty->print_cr(" (avg = %8.2fms).", _all_full_gc_times.avg()); |
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2570 gclog_or_tty->print_cr(" [std. dev = %8.2f ms, max = %8.2f ms]", |
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2571 _all_full_gc_times.sd(), |
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2572 _all_full_gc_times.maximum()); |
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2573 } |
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2574 } |