1 /* 2 * Copyright (c) 2013, 2016, 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/concurrentG1Refine.hpp" 27 #include "gc/g1/g1CollectedHeap.inline.hpp" 28 #include "gc/g1/g1GCPhaseTimes.hpp" 29 #include "gc/g1/g1StringDedup.hpp" 30 #include "gc/g1/workerDataArray.inline.hpp" 31 #include "memory/resourceArea.hpp" 32 #include "logging/log.hpp" 33 #include "runtime/timer.hpp" 34 #include "runtime/os.hpp" 35 36 static const char* Indents[5] = {"", " ", " ", " ", " "}; 37 38 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) : 39 _max_gc_threads(max_gc_threads) 40 { 41 assert(max_gc_threads > 0, "Must have some GC threads"); 42 43 _gc_par_phases[GCWorkerStart] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Start (ms):"); 44 _gc_par_phases[ExtRootScan] = new WorkerDataArray<double>(max_gc_threads, "Ext Root Scanning (ms):"); 45 46 // Root scanning phases 47 _gc_par_phases[ThreadRoots] = new WorkerDataArray<double>(max_gc_threads, "Thread Roots (ms):"); 48 _gc_par_phases[StringTableRoots] = new WorkerDataArray<double>(max_gc_threads, "StringTable Roots (ms):"); 49 _gc_par_phases[UniverseRoots] = new WorkerDataArray<double>(max_gc_threads, "Universe Roots (ms):"); 50 _gc_par_phases[JNIRoots] = new WorkerDataArray<double>(max_gc_threads, "JNI Handles Roots (ms):"); 51 _gc_par_phases[ObjectSynchronizerRoots] = new WorkerDataArray<double>(max_gc_threads, "ObjectSynchronizer Roots (ms):"); 52 _gc_par_phases[FlatProfilerRoots] = new WorkerDataArray<double>(max_gc_threads, "FlatProfiler Roots (ms):"); 53 _gc_par_phases[ManagementRoots] = new WorkerDataArray<double>(max_gc_threads, "Management Roots (ms):"); 54 _gc_par_phases[SystemDictionaryRoots] = new WorkerDataArray<double>(max_gc_threads, "SystemDictionary Roots (ms):"); 55 _gc_par_phases[CLDGRoots] = new WorkerDataArray<double>(max_gc_threads, "CLDG Roots (ms):"); 56 _gc_par_phases[JVMTIRoots] = new WorkerDataArray<double>(max_gc_threads, "JVMTI Roots (ms):"); 57 _gc_par_phases[CMRefRoots] = new WorkerDataArray<double>(max_gc_threads, "CM RefProcessor Roots (ms):"); 58 _gc_par_phases[WaitForStrongCLD] = new WorkerDataArray<double>(max_gc_threads, "Wait For Strong CLD (ms):"); 59 _gc_par_phases[WeakCLDRoots] = new WorkerDataArray<double>(max_gc_threads, "Weak CLD Roots (ms):"); 60 _gc_par_phases[SATBFiltering] = new WorkerDataArray<double>(max_gc_threads, "SATB Filtering (ms):"); 61 62 _gc_par_phases[UpdateRS] = new WorkerDataArray<double>(max_gc_threads, "Update RS (ms):"); 63 if (ConcurrentG1Refine::hot_card_cache_enabled()) { 64 _gc_par_phases[ScanHCC] = new WorkerDataArray<double>(max_gc_threads, "Scan HCC (ms):"); 65 } else { 66 _gc_par_phases[ScanHCC] = NULL; 67 } 68 _gc_par_phases[ScanRS] = new WorkerDataArray<double>(max_gc_threads, "Scan RS (ms):"); 69 _gc_par_phases[CodeRoots] = new WorkerDataArray<double>(max_gc_threads, "Code Root Scanning (ms):"); 70 _gc_par_phases[ObjCopy] = new WorkerDataArray<double>(max_gc_threads, "Object Copy (ms):"); 71 _gc_par_phases[Termination] = new WorkerDataArray<double>(max_gc_threads, "Termination (ms):"); 72 _gc_par_phases[GCWorkerTotal] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Total (ms):"); 73 _gc_par_phases[GCWorkerEnd] = new WorkerDataArray<double>(max_gc_threads, "GC Worker End (ms):"); 74 _gc_par_phases[Other] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Other (ms):"); 75 76 _update_rs_processed_buffers = new WorkerDataArray<size_t>(max_gc_threads, "Processed Buffers:"); 77 _gc_par_phases[UpdateRS]->link_thread_work_items(_update_rs_processed_buffers); 78 79 _termination_attempts = new WorkerDataArray<size_t>(max_gc_threads, "Termination Attempts:"); 80 _gc_par_phases[Termination]->link_thread_work_items(_termination_attempts); 81 82 if (UseStringDeduplication) { 83 _gc_par_phases[StringDedupQueueFixup] = new WorkerDataArray<double>(max_gc_threads, "Queue Fixup (ms):"); 84 _gc_par_phases[StringDedupTableFixup] = new WorkerDataArray<double>(max_gc_threads, "Table Fixup (ms):"); 85 } else { 86 _gc_par_phases[StringDedupQueueFixup] = NULL; 87 _gc_par_phases[StringDedupTableFixup] = NULL; 88 } 89 90 _gc_par_phases[RedirtyCards] = new WorkerDataArray<double>(max_gc_threads, "Parallel Redirty (ms):"); 91 _redirtied_cards = new WorkerDataArray<size_t>(max_gc_threads, "Redirtied Cards:"); 92 _gc_par_phases[RedirtyCards]->link_thread_work_items(_redirtied_cards); 93 94 _gc_par_phases[PreserveCMReferents] = new WorkerDataArray<double>(max_gc_threads, "Parallel Preserve CM Refs (ms):"); 95 } 96 97 void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) { 98 assert(active_gc_threads > 0, "The number of threads must be > 0"); 99 assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max number of threads"); 100 _gc_start_counter = os::elapsed_counter(); 101 _active_gc_threads = active_gc_threads; 102 _cur_expand_heap_time_ms = 0.0; 103 _external_accounted_time_ms = 0.0; 104 105 for (int i = 0; i < GCParPhasesSentinel; i++) { 106 if (_gc_par_phases[i] != NULL) { 107 _gc_par_phases[i]->reset(); 108 } 109 } 110 } 111 112 void G1GCPhaseTimes::note_gc_end() { 113 _gc_pause_time_ms = TimeHelper::counter_to_millis(os::elapsed_counter() - _gc_start_counter); 114 for (uint i = 0; i < _active_gc_threads; i++) { 115 double worker_time = _gc_par_phases[GCWorkerEnd]->get(i) - _gc_par_phases[GCWorkerStart]->get(i); 116 record_time_secs(GCWorkerTotal, i , worker_time); 117 118 double worker_known_time = 119 _gc_par_phases[ExtRootScan]->get(i) + 120 _gc_par_phases[SATBFiltering]->get(i) + 121 _gc_par_phases[UpdateRS]->get(i) + 122 _gc_par_phases[ScanRS]->get(i) + 123 _gc_par_phases[CodeRoots]->get(i) + 124 _gc_par_phases[ObjCopy]->get(i) + 125 _gc_par_phases[Termination]->get(i); 126 127 record_time_secs(Other, i, worker_time - worker_known_time); 128 } 129 130 for (int i = 0; i < GCParPhasesSentinel; i++) { 131 if (_gc_par_phases[i] != NULL) { 132 _gc_par_phases[i]->verify(_active_gc_threads); 133 } 134 } 135 } 136 137 // record the time a phase took in seconds 138 void G1GCPhaseTimes::record_time_secs(GCParPhases phase, uint worker_i, double secs) { 139 _gc_par_phases[phase]->set(worker_i, secs); 140 } 141 142 // add a number of seconds to a phase 143 void G1GCPhaseTimes::add_time_secs(GCParPhases phase, uint worker_i, double secs) { 144 _gc_par_phases[phase]->add(worker_i, secs); 145 } 146 147 void G1GCPhaseTimes::record_thread_work_item(GCParPhases phase, uint worker_i, size_t count) { 148 _gc_par_phases[phase]->set_thread_work_item(worker_i, count); 149 } 150 151 // return the average time for a phase in milliseconds 152 double G1GCPhaseTimes::average_time_ms(GCParPhases phase) { 153 return _gc_par_phases[phase]->average(_active_gc_threads) * 1000.0; 154 } 155 156 size_t G1GCPhaseTimes::sum_thread_work_items(GCParPhases phase) { 157 assert(_gc_par_phases[phase]->thread_work_items() != NULL, "No sub count"); 158 return _gc_par_phases[phase]->thread_work_items()->sum(_active_gc_threads); 159 } 160 161 template <class T> 162 void G1GCPhaseTimes::details(T* phase, const char* indent) { 163 LogHandle(gc, phases, task) log; 164 if (log.is_level(LogLevel::Trace)) { 165 outputStream* trace_out = log.trace_stream(); 166 trace_out->print("%s", indent); 167 phase->print_details_on(trace_out, _active_gc_threads); 168 } 169 } 170 171 void G1GCPhaseTimes::log_phase(WorkerDataArray<double>* phase, uint indent, outputStream* out, bool print_sum) { 172 out->print("%s", Indents[indent]); 173 phase->print_summary_on(out, _active_gc_threads, print_sum); 174 details(phase, Indents[indent]); 175 176 WorkerDataArray<size_t>* work_items = phase->thread_work_items(); 177 if (work_items != NULL) { 178 out->print("%s", Indents[indent + 1]); 179 work_items->print_summary_on(out, _active_gc_threads, true); 180 details(work_items, Indents[indent + 1]); 181 } 182 } 183 184 void G1GCPhaseTimes::debug_phase(WorkerDataArray<double>* phase) { 185 LogHandle(gc, phases) log; 186 if (log.is_level(LogLevel::Debug)) { 187 ResourceMark rm; 188 log_phase(phase, 2, log.debug_stream(), true); 189 } 190 } 191 192 void G1GCPhaseTimes::trace_phase(WorkerDataArray<double>* phase, bool print_sum) { 193 LogHandle(gc, phases) log; 194 if (log.is_level(LogLevel::Trace)) { 195 ResourceMark rm; 196 log_phase(phase, 3, log.trace_stream(), print_sum); 197 } 198 } 199 200 #define PHASE_DOUBLE_FORMAT "%s%s: %.1lfms" 201 #define PHASE_SIZE_FORMAT "%s%s: " SIZE_FORMAT 202 203 #define info_line(str, value) \ 204 log_info(gc, phases)(PHASE_DOUBLE_FORMAT, Indents[1], str, value); 205 206 #define debug_line(str, value) \ 207 log_debug(gc, phases)(PHASE_DOUBLE_FORMAT, Indents[2], str, value); 208 209 #define trace_line(str, value) \ 210 log_trace(gc, phases)(PHASE_DOUBLE_FORMAT, Indents[3], str, value); 211 212 #define trace_line_sz(str, value) \ 213 log_trace(gc, phases)(PHASE_SIZE_FORMAT, Indents[3], str, value); 214 215 #define trace_line_ms(str, value) \ 216 log_trace(gc, phases)(PHASE_SIZE_FORMAT, Indents[3], str, value); 217 218 #define info_line_and_account(str, value) \ 219 info_line(str, value); \ 220 accounted_time_ms += value; 221 222 void G1GCPhaseTimes::print() { 223 note_gc_end(); 224 225 double accounted_time_ms = _external_accounted_time_ms; 226 if (_root_region_scan_wait_time_ms > 0.0) { 227 info_line_and_account("Root Region Scan Waiting", _root_region_scan_wait_time_ms); 228 } 229 230 info_line_and_account("Evacuate Collection Set", _cur_collection_par_time_ms); 231 trace_phase(_gc_par_phases[GCWorkerStart], false); 232 debug_phase(_gc_par_phases[ExtRootScan]); 233 for (int i = ThreadRoots; i <= SATBFiltering; i++) { 234 trace_phase(_gc_par_phases[i]); 235 } 236 debug_phase(_gc_par_phases[UpdateRS]); 237 if (ConcurrentG1Refine::hot_card_cache_enabled()) { 238 trace_phase(_gc_par_phases[ScanHCC]); 239 } 240 debug_phase(_gc_par_phases[ScanRS]); 241 debug_phase(_gc_par_phases[CodeRoots]); 242 debug_phase(_gc_par_phases[ObjCopy]); 243 debug_phase(_gc_par_phases[Termination]); 244 debug_phase(_gc_par_phases[Other]); 245 debug_phase(_gc_par_phases[GCWorkerTotal]); 246 trace_phase(_gc_par_phases[GCWorkerEnd], false); 247 248 info_line_and_account("Code Roots", _cur_collection_code_root_fixup_time_ms + _cur_strong_code_root_purge_time_ms); 249 debug_line("Code Roots Fixup", _cur_collection_code_root_fixup_time_ms); 250 debug_line("Code Roots Purge", _cur_strong_code_root_purge_time_ms); 251 252 if (G1StringDedup::is_enabled()) { 253 info_line_and_account("String Dedup Fixup", _cur_string_dedup_fixup_time_ms); 254 debug_phase(_gc_par_phases[StringDedupQueueFixup]); 255 debug_phase(_gc_par_phases[StringDedupTableFixup]); 256 } 257 info_line_and_account("Clear Card Table", _cur_clear_ct_time_ms); 258 info_line_and_account("Expand Heap After Collection", _cur_expand_heap_time_ms); 259 260 double free_cset_time = _recorded_young_free_cset_time_ms + _recorded_non_young_free_cset_time_ms; 261 info_line_and_account("Free Collection Set", free_cset_time); 262 debug_line("Young Free Collection Set", _recorded_young_free_cset_time_ms); 263 debug_line("Non-Young Free Collection Set", _recorded_non_young_free_cset_time_ms); 264 info_line_and_account("Merge Per-Thread State", _recorded_merge_pss_time_ms); 265 266 info_line("Other", _gc_pause_time_ms - accounted_time_ms); 267 if (_cur_verify_before_time_ms > 0.0) { 268 debug_line("Verify Before", _cur_verify_before_time_ms); 269 } 270 if (G1CollectedHeap::heap()->evacuation_failed()) { 271 double evac_fail_handling = _cur_evac_fail_recalc_used + _cur_evac_fail_remove_self_forwards + 272 _cur_evac_fail_restore_remsets; 273 debug_line("Evacuation Failure", evac_fail_handling); 274 trace_line("Recalculate Used", _cur_evac_fail_recalc_used); 275 trace_line("Remove Self Forwards",_cur_evac_fail_remove_self_forwards); 276 trace_line("Restore RemSet", _cur_evac_fail_restore_remsets); 277 } 278 debug_line("Choose CSet", (_recorded_young_cset_choice_time_ms + _recorded_non_young_cset_choice_time_ms)); 279 debug_line("Preserve CM Refs", _recorded_preserve_cm_referents_time_ms); 280 trace_phase(_gc_par_phases[PreserveCMReferents]); 281 debug_line("Reference Processing", _cur_ref_proc_time_ms); 282 debug_line("Reference Enqueuing", _cur_ref_enq_time_ms); 283 debug_line("Redirty Cards", _recorded_redirty_logged_cards_time_ms); 284 trace_phase(_gc_par_phases[RedirtyCards]); 285 if (G1EagerReclaimHumongousObjects) { 286 debug_line("Humongous Register", _cur_fast_reclaim_humongous_register_time_ms); 287 trace_line_sz("Humongous Total", _cur_fast_reclaim_humongous_total); 288 trace_line_sz("Humongous Candidate", _cur_fast_reclaim_humongous_candidates); 289 debug_line("Humongous Reclaim", _cur_fast_reclaim_humongous_time_ms); 290 trace_line_sz("Humongous Reclaimed", _cur_fast_reclaim_humongous_reclaimed); 291 } 292 if (_cur_verify_after_time_ms > 0.0) { 293 debug_line("Verify After", _cur_verify_after_time_ms); 294 } 295 } 296 297 G1GCParPhaseTimesTracker::G1GCParPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1GCPhaseTimes::GCParPhases phase, uint worker_id) : 298 _phase_times(phase_times), _phase(phase), _worker_id(worker_id) { 299 if (_phase_times != NULL) { 300 _start_time = os::elapsedTime(); 301 } 302 } 303 304 G1GCParPhaseTimesTracker::~G1GCParPhaseTimesTracker() { 305 if (_phase_times != NULL) { 306 _phase_times->record_time_secs(_phase, _worker_id, os::elapsedTime() - _start_time); 307 } 308 } 309