1 /* 2 * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "gc/g1/g1CollectedHeap.inline.hpp" 27 #include "gc/g1/g1ConcurrentRefine.hpp" 28 #include "gc/g1/g1ConcurrentRefineThread.hpp" 29 #include "gc/g1/g1RemSet.hpp" 30 #include "gc/g1/g1RemSetSummary.hpp" 31 #include "gc/g1/g1YoungRemSetSamplingThread.hpp" 32 #include "gc/g1/heapRegion.hpp" 33 #include "gc/g1/heapRegionRemSet.hpp" 34 #include "memory/allocation.inline.hpp" 35 #include "runtime/thread.inline.hpp" 36 37 class GetRSThreadVTimeClosure : public ThreadClosure { 38 private: 39 G1RemSetSummary* _summary; 40 uint _counter; 41 42 public: 43 GetRSThreadVTimeClosure(G1RemSetSummary * summary) : ThreadClosure(), _summary(summary), _counter(0) { 44 assert(_summary != NULL, "just checking"); 45 } 46 47 virtual void do_thread(Thread* t) { 48 G1ConcurrentRefineThread* crt = (G1ConcurrentRefineThread*) t; 49 _summary->set_rs_thread_vtime(_counter, crt->vtime_accum()); 50 _counter++; 51 } 52 }; 53 54 void G1RemSetSummary::update() { 55 _num_conc_refined_cards = _rem_set->num_conc_refined_cards(); 56 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); 57 _num_processed_buf_mutator = dcqs.processed_buffers_mut(); 58 _num_processed_buf_rs_threads = dcqs.processed_buffers_rs_thread(); 59 60 _num_coarsenings = HeapRegionRemSet::n_coarsenings(); 61 62 G1CollectedHeap* g1h = G1CollectedHeap::heap(); 63 G1ConcurrentRefine* cg1r = g1h->concurrent_refine(); 64 if (_rs_threads_vtimes != NULL) { 65 GetRSThreadVTimeClosure p(this); 66 cg1r->threads_do(&p); 67 } 68 set_sampling_thread_vtime(g1h->sampling_thread()->vtime_accum()); 69 } 70 71 void G1RemSetSummary::set_rs_thread_vtime(uint thread, double value) { 72 assert(_rs_threads_vtimes != NULL, "just checking"); 73 assert(thread < _num_vtimes, "just checking"); 74 _rs_threads_vtimes[thread] = value; 75 } 76 77 double G1RemSetSummary::rs_thread_vtime(uint thread) const { 78 assert(_rs_threads_vtimes != NULL, "just checking"); 79 assert(thread < _num_vtimes, "just checking"); 80 return _rs_threads_vtimes[thread]; 81 } 82 83 G1RemSetSummary::G1RemSetSummary() : 84 _rem_set(NULL), 85 _num_conc_refined_cards(0), 86 _num_processed_buf_mutator(0), 87 _num_processed_buf_rs_threads(0), 88 _num_coarsenings(0), 89 _num_vtimes(G1ConcurrentRefine::max_num_threads()), 90 _rs_threads_vtimes(NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC)), 91 _sampling_thread_vtime(0.0f) { 92 93 memset(_rs_threads_vtimes, 0, sizeof(double) * _num_vtimes); 94 } 95 96 G1RemSetSummary::G1RemSetSummary(G1RemSet* rem_set) : 97 _rem_set(rem_set), 98 _num_conc_refined_cards(0), 99 _num_processed_buf_mutator(0), 100 _num_processed_buf_rs_threads(0), 101 _num_coarsenings(0), 102 _num_vtimes(G1ConcurrentRefine::max_num_threads()), 103 _rs_threads_vtimes(NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC)), 104 _sampling_thread_vtime(0.0f) { 105 update(); 106 } 107 108 G1RemSetSummary::~G1RemSetSummary() { 109 if (_rs_threads_vtimes) { 110 FREE_C_HEAP_ARRAY(double, _rs_threads_vtimes); 111 } 112 } 113 114 void G1RemSetSummary::set(G1RemSetSummary* other) { 115 assert(other != NULL, "just checking"); 116 assert(_num_vtimes == other->_num_vtimes, "just checking"); 117 118 _num_conc_refined_cards = other->num_conc_refined_cards(); 119 120 _num_processed_buf_mutator = other->num_processed_buf_mutator(); 121 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads(); 122 123 _num_coarsenings = other->_num_coarsenings; 124 125 memcpy(_rs_threads_vtimes, other->_rs_threads_vtimes, sizeof(double) * _num_vtimes); 126 127 set_sampling_thread_vtime(other->sampling_thread_vtime()); 128 } 129 130 void G1RemSetSummary::subtract_from(G1RemSetSummary* other) { 131 assert(other != NULL, "just checking"); 132 assert(_num_vtimes == other->_num_vtimes, "just checking"); 133 134 _num_conc_refined_cards = other->num_conc_refined_cards() - _num_conc_refined_cards; 135 136 _num_processed_buf_mutator = other->num_processed_buf_mutator() - _num_processed_buf_mutator; 137 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads() - _num_processed_buf_rs_threads; 138 139 _num_coarsenings = other->num_coarsenings() - _num_coarsenings; 140 141 for (uint i = 0; i < _num_vtimes; i++) { 142 set_rs_thread_vtime(i, other->rs_thread_vtime(i) - rs_thread_vtime(i)); 143 } 144 145 _sampling_thread_vtime = other->sampling_thread_vtime() - _sampling_thread_vtime; 146 } 147 148 class RegionTypeCounter VALUE_OBJ_CLASS_SPEC { 149 private: 150 const char* _name; 151 152 size_t _rs_mem_size; 153 size_t _cards_occupied; 154 size_t _amount; 155 156 size_t _code_root_mem_size; 157 size_t _code_root_elems; 158 159 double rs_mem_size_percent_of(size_t total) { 160 return percent_of(_rs_mem_size, total); 161 } 162 163 double cards_occupied_percent_of(size_t total) { 164 return percent_of(_cards_occupied, total); 165 } 166 167 double code_root_mem_size_percent_of(size_t total) { 168 return percent_of(_code_root_mem_size, total); 169 } 170 171 double code_root_elems_percent_of(size_t total) { 172 return percent_of(_code_root_elems, total); 173 } 174 175 size_t amount() const { return _amount; } 176 177 public: 178 179 RegionTypeCounter(const char* name) : _name(name), _rs_mem_size(0), _cards_occupied(0), 180 _amount(0), _code_root_mem_size(0), _code_root_elems(0) { } 181 182 void add(size_t rs_mem_size, size_t cards_occupied, size_t code_root_mem_size, 183 size_t code_root_elems) { 184 _rs_mem_size += rs_mem_size; 185 _cards_occupied += cards_occupied; 186 _code_root_mem_size += code_root_mem_size; 187 _code_root_elems += code_root_elems; 188 _amount++; 189 } 190 191 size_t rs_mem_size() const { return _rs_mem_size; } 192 size_t cards_occupied() const { return _cards_occupied; } 193 194 size_t code_root_mem_size() const { return _code_root_mem_size; } 195 size_t code_root_elems() const { return _code_root_elems; } 196 197 void print_rs_mem_info_on(outputStream * out, size_t total) { 198 out->print_cr(" " SIZE_FORMAT_W(8) "%s (%5.1f%%) by " SIZE_FORMAT " %s regions", 199 byte_size_in_proper_unit(rs_mem_size()), 200 proper_unit_for_byte_size(rs_mem_size()), 201 rs_mem_size_percent_of(total), amount(), _name); 202 } 203 204 void print_cards_occupied_info_on(outputStream * out, size_t total) { 205 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) entries by " SIZE_FORMAT " %s regions", 206 cards_occupied(), cards_occupied_percent_of(total), amount(), _name); 207 } 208 209 void print_code_root_mem_info_on(outputStream * out, size_t total) { 210 out->print_cr(" " SIZE_FORMAT_W(8) "%s (%5.1f%%) by " SIZE_FORMAT " %s regions", 211 byte_size_in_proper_unit(code_root_mem_size()), 212 proper_unit_for_byte_size(code_root_mem_size()), 213 code_root_mem_size_percent_of(total), amount(), _name); 214 } 215 216 void print_code_root_elems_info_on(outputStream * out, size_t total) { 217 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) elements by " SIZE_FORMAT " %s regions", 218 code_root_elems(), code_root_elems_percent_of(total), amount(), _name); 219 } 220 }; 221 222 223 class HRRSStatsIter: public HeapRegionClosure { 224 private: 225 RegionTypeCounter _young; 226 RegionTypeCounter _humongous; 227 RegionTypeCounter _free; 228 RegionTypeCounter _old; 229 RegionTypeCounter _all; 230 231 size_t _max_rs_mem_sz; 232 HeapRegion* _max_rs_mem_sz_region; 233 234 size_t total_rs_mem_sz() const { return _all.rs_mem_size(); } 235 size_t total_cards_occupied() const { return _all.cards_occupied(); } 236 237 size_t max_rs_mem_sz() const { return _max_rs_mem_sz; } 238 HeapRegion* max_rs_mem_sz_region() const { return _max_rs_mem_sz_region; } 239 240 size_t _max_code_root_mem_sz; 241 HeapRegion* _max_code_root_mem_sz_region; 242 243 size_t total_code_root_mem_sz() const { return _all.code_root_mem_size(); } 244 size_t total_code_root_elems() const { return _all.code_root_elems(); } 245 246 size_t max_code_root_mem_sz() const { return _max_code_root_mem_sz; } 247 HeapRegion* max_code_root_mem_sz_region() const { return _max_code_root_mem_sz_region; } 248 249 public: 250 HRRSStatsIter() : _all("All"), _young("Young"), _humongous("Humongous"), 251 _free("Free"), _old("Old"), _max_code_root_mem_sz_region(NULL), _max_rs_mem_sz_region(NULL), 252 _max_rs_mem_sz(0), _max_code_root_mem_sz(0) 253 {} 254 255 bool do_heap_region(HeapRegion* r) { 256 HeapRegionRemSet* hrrs = r->rem_set(); 257 258 // HeapRegionRemSet::mem_size() includes the 259 // size of the strong code roots 260 size_t rs_mem_sz = hrrs->mem_size(); 261 if (rs_mem_sz > _max_rs_mem_sz) { 262 _max_rs_mem_sz = rs_mem_sz; 263 _max_rs_mem_sz_region = r; 264 } 265 size_t occupied_cards = hrrs->occupied(); 266 size_t code_root_mem_sz = hrrs->strong_code_roots_mem_size(); 267 if (code_root_mem_sz > max_code_root_mem_sz()) { 268 _max_code_root_mem_sz = code_root_mem_sz; 269 _max_code_root_mem_sz_region = r; 270 } 271 size_t code_root_elems = hrrs->strong_code_roots_list_length(); 272 273 RegionTypeCounter* current = NULL; 274 if (r->is_free()) { 275 current = &_free; 276 } else if (r->is_young()) { 277 current = &_young; 278 } else if (r->is_humongous()) { 279 current = &_humongous; 280 } else if (r->is_old()) { 281 current = &_old; 282 } else { 283 ShouldNotReachHere(); 284 } 285 current->add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems); 286 _all.add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems); 287 288 return false; 289 } 290 291 void print_summary_on(outputStream* out) { 292 RegionTypeCounter* counters[] = { &_young, &_humongous, &_free, &_old, NULL }; 293 294 out->print_cr(" Current rem set statistics"); 295 out->print_cr(" Total per region rem sets sizes = " SIZE_FORMAT "%s." 296 " Max = " SIZE_FORMAT "%s.", 297 byte_size_in_proper_unit(total_rs_mem_sz()), 298 proper_unit_for_byte_size(total_rs_mem_sz()), 299 byte_size_in_proper_unit(max_rs_mem_sz()), 300 proper_unit_for_byte_size(max_rs_mem_sz())); 301 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) { 302 (*current)->print_rs_mem_info_on(out, total_rs_mem_sz()); 303 } 304 305 out->print_cr(" Static structures = " SIZE_FORMAT "%s," 306 " free_lists = " SIZE_FORMAT "%s.", 307 byte_size_in_proper_unit(HeapRegionRemSet::static_mem_size()), 308 proper_unit_for_byte_size(HeapRegionRemSet::static_mem_size()), 309 byte_size_in_proper_unit(HeapRegionRemSet::fl_mem_size()), 310 proper_unit_for_byte_size(HeapRegionRemSet::fl_mem_size())); 311 312 out->print_cr(" " SIZE_FORMAT " occupied cards represented.", 313 total_cards_occupied()); 314 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) { 315 (*current)->print_cards_occupied_info_on(out, total_cards_occupied()); 316 } 317 318 // Largest sized rem set region statistics 319 HeapRegionRemSet* rem_set = max_rs_mem_sz_region()->rem_set(); 320 out->print_cr(" Region with largest rem set = " HR_FORMAT ", " 321 "size = " SIZE_FORMAT "%s, occupied = " SIZE_FORMAT "%s.", 322 HR_FORMAT_PARAMS(max_rs_mem_sz_region()), 323 byte_size_in_proper_unit(rem_set->mem_size()), 324 proper_unit_for_byte_size(rem_set->mem_size()), 325 byte_size_in_proper_unit(rem_set->occupied()), 326 proper_unit_for_byte_size(rem_set->occupied())); 327 // Strong code root statistics 328 HeapRegionRemSet* max_code_root_rem_set = max_code_root_mem_sz_region()->rem_set(); 329 out->print_cr(" Total heap region code root sets sizes = " SIZE_FORMAT "%s." 330 " Max = " SIZE_FORMAT "%s.", 331 byte_size_in_proper_unit(total_code_root_mem_sz()), 332 proper_unit_for_byte_size(total_code_root_mem_sz()), 333 byte_size_in_proper_unit(max_code_root_rem_set->strong_code_roots_mem_size()), 334 proper_unit_for_byte_size(max_code_root_rem_set->strong_code_roots_mem_size())); 335 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) { 336 (*current)->print_code_root_mem_info_on(out, total_code_root_mem_sz()); 337 } 338 339 out->print_cr(" " SIZE_FORMAT " code roots represented.", 340 total_code_root_elems()); 341 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) { 342 (*current)->print_code_root_elems_info_on(out, total_code_root_elems()); 343 } 344 345 out->print_cr(" Region with largest amount of code roots = " HR_FORMAT ", " 346 "size = " SIZE_FORMAT "%s, num_elems = " SIZE_FORMAT ".", 347 HR_FORMAT_PARAMS(max_code_root_mem_sz_region()), 348 byte_size_in_proper_unit(max_code_root_rem_set->strong_code_roots_mem_size()), 349 proper_unit_for_byte_size(max_code_root_rem_set->strong_code_roots_mem_size()), 350 max_code_root_rem_set->strong_code_roots_list_length()); 351 } 352 }; 353 354 void G1RemSetSummary::print_on(outputStream* out) { 355 out->print_cr(" Recent concurrent refinement statistics"); 356 out->print_cr(" Processed " SIZE_FORMAT " cards concurrently", num_conc_refined_cards()); 357 out->print_cr(" Of " SIZE_FORMAT " completed buffers:", num_processed_buf_total()); 358 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) by concurrent RS threads.", 359 num_processed_buf_total(), 360 percent_of(num_processed_buf_rs_threads(), num_processed_buf_total())); 361 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) by mutator threads.", 362 num_processed_buf_mutator(), 363 percent_of(num_processed_buf_mutator(), num_processed_buf_total())); 364 out->print_cr(" Did " SIZE_FORMAT " coarsenings.", num_coarsenings()); 365 out->print_cr(" Concurrent RS threads times (s)"); 366 out->print(" "); 367 for (uint i = 0; i < _num_vtimes; i++) { 368 out->print(" %5.2f", rs_thread_vtime(i)); 369 } 370 out->cr(); 371 out->print_cr(" Concurrent sampling threads times (s)"); 372 out->print_cr(" %5.2f", sampling_thread_vtime()); 373 374 HRRSStatsIter blk; 375 G1CollectedHeap::heap()->heap_region_iterate(&blk); 376 blk.print_summary_on(out); 377 }