1 /*
2 * Copyright (c) 2013, 2020, 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/g1GCParPhaseTimesTracker.hpp"
28 #include "gc/g1/g1GCPhaseTimes.hpp"
29 #include "gc/g1/g1HotCardCache.hpp"
30 #include "gc/g1/g1ParScanThreadState.inline.hpp"
31 #include "gc/g1/g1StringDedup.hpp"
32 #include "gc/shared/gcTimer.hpp"
33 #include "gc/shared/oopStorage.hpp"
34 #include "gc/shared/workerDataArray.inline.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logStream.hpp"
38 #include "runtime/timer.hpp"
39 #include "runtime/os.hpp"
40 #include "utilities/macros.hpp"
41
indent(uint level)42 static const char* indent(uint level) {
43 static const char* Indents[] = {"", " ", " ", " ", " ", " "};
44 assert(level < ARRAY_SIZE(Indents), "Too high indent level %u", level);
45 return Indents[level];
46 }
47
G1GCPhaseTimes(STWGCTimer * gc_timer,uint max_gc_threads)48 G1GCPhaseTimes::G1GCPhaseTimes(STWGCTimer* gc_timer, uint max_gc_threads) :
49 _max_gc_threads(max_gc_threads),
50 _gc_start_counter(0),
51 _gc_pause_time_ms(0.0),
52 _ref_phase_times(gc_timer, max_gc_threads),
53 _weak_phase_times(max_gc_threads)
54 {
55 assert(max_gc_threads > 0, "Must have some GC threads");
56
57 _gc_par_phases[GCWorkerStart] = new WorkerDataArray<double>("GCWorkerStart", "GC Worker Start (ms):", max_gc_threads);
58 _gc_par_phases[ExtRootScan] = new WorkerDataArray<double>("ExtRootScan", "Ext Root Scanning (ms):", max_gc_threads);
59
60 // Root scanning phases
61 _gc_par_phases[ThreadRoots] = new WorkerDataArray<double>("ThreadRoots", "Thread Roots (ms):", max_gc_threads);
62 _gc_par_phases[CLDGRoots] = new WorkerDataArray<double>("CLDGRoots", "CLDG Roots (ms):", max_gc_threads);
63 AOT_ONLY(_gc_par_phases[AOTCodeRoots] = new WorkerDataArray<double>("AOTCodeRoots", "AOT Root Scan (ms):", max_gc_threads);)
64 _gc_par_phases[CMRefRoots] = new WorkerDataArray<double>("CMRefRoots", "CM RefProcessor Roots (ms):", max_gc_threads);
65
66 int index = G1GCPhaseTimes::StrongOopStorageSetRoots;
67 for (OopStorageSet::Iterator it = OopStorageSet::strong_iterator(); !it.is_end(); ++it, ++index) {
68 const char* phase_name_postfix = " Roots (ms):";
69 char* oop_storage_phase_name = NEW_C_HEAP_ARRAY(char, strlen(phase_name_postfix) + strlen(it->name()) + 1, mtGC);
70 strcpy(oop_storage_phase_name, it->name());
71 strcat(oop_storage_phase_name, phase_name_postfix);
72 _gc_par_phases[index] = new WorkerDataArray<double>(it->name(), oop_storage_phase_name, max_gc_threads);
73 }
74
75 _gc_par_phases[MergeER] = new WorkerDataArray<double>("MergeER", "Eager Reclaim (ms):", max_gc_threads);
76
77 _gc_par_phases[MergeRS] = new WorkerDataArray<double>("MergeRS", "Remembered Sets (ms):", max_gc_threads);
78 _gc_par_phases[MergeRS]->create_thread_work_items("Merged Sparse:", MergeRSMergedSparse);
79 _gc_par_phases[MergeRS]->create_thread_work_items("Merged Fine:", MergeRSMergedFine);
80 _gc_par_phases[MergeRS]->create_thread_work_items("Merged Coarse:", MergeRSMergedCoarse);
81 _gc_par_phases[MergeRS]->create_thread_work_items("Dirty Cards:", MergeRSDirtyCards);
82
83 _gc_par_phases[OptMergeRS] = new WorkerDataArray<double>("OptMergeRS", "Optional Remembered Sets (ms):", max_gc_threads);
84 _gc_par_phases[OptMergeRS]->create_thread_work_items("Merged Sparse:", MergeRSMergedSparse);
85 _gc_par_phases[OptMergeRS]->create_thread_work_items("Merged Fine:", MergeRSMergedFine);
86 _gc_par_phases[OptMergeRS]->create_thread_work_items("Merged Coarse:", MergeRSMergedCoarse);
87 _gc_par_phases[OptMergeRS]->create_thread_work_items("Dirty Cards:", MergeRSDirtyCards);
88
89 _gc_par_phases[MergeLB] = new WorkerDataArray<double>("MergeLB", "Log Buffers (ms):", max_gc_threads);
90 if (G1HotCardCache::default_use_cache()) {
91 _gc_par_phases[MergeHCC] = new WorkerDataArray<double>("MergeHCC", "Hot Card Cache (ms):", max_gc_threads);
92 _gc_par_phases[MergeHCC]->create_thread_work_items("Dirty Cards:", MergeHCCDirtyCards);
93 _gc_par_phases[MergeHCC]->create_thread_work_items("Skipped Cards:", MergeHCCSkippedCards);
94 } else {
95 _gc_par_phases[MergeHCC] = NULL;
96 }
97 _gc_par_phases[ScanHR] = new WorkerDataArray<double>("ScanHR", "Scan Heap Roots (ms):", max_gc_threads);
98 _gc_par_phases[OptScanHR] = new WorkerDataArray<double>("OptScanHR", "Optional Scan Heap Roots (ms):", max_gc_threads);
99 _gc_par_phases[CodeRoots] = new WorkerDataArray<double>("CodeRoots", "Code Root Scan (ms):", max_gc_threads);
100 _gc_par_phases[OptCodeRoots] = new WorkerDataArray<double>("OptCodeRoots", "Optional Code Root Scan (ms):", max_gc_threads);
101 _gc_par_phases[ObjCopy] = new WorkerDataArray<double>("ObjCopy", "Object Copy (ms):", max_gc_threads);
102 _gc_par_phases[OptObjCopy] = new WorkerDataArray<double>("OptObjCopy", "Optional Object Copy (ms):", max_gc_threads);
103 _gc_par_phases[Termination] = new WorkerDataArray<double>("Termination", "Termination (ms):", max_gc_threads);
104 _gc_par_phases[OptTermination] = new WorkerDataArray<double>("OptTermination", "Optional Termination (ms):", max_gc_threads);
105 _gc_par_phases[GCWorkerTotal] = new WorkerDataArray<double>("GCWorkerTotal", "GC Worker Total (ms):", max_gc_threads);
106 _gc_par_phases[GCWorkerEnd] = new WorkerDataArray<double>("GCWorkerEnd", "GC Worker End (ms):", max_gc_threads);
107 _gc_par_phases[Other] = new WorkerDataArray<double>("Other", "GC Worker Other (ms):", max_gc_threads);
108
109 _gc_par_phases[ScanHR]->create_thread_work_items("Scanned Cards:", ScanHRScannedCards);
110 _gc_par_phases[ScanHR]->create_thread_work_items("Scanned Blocks:", ScanHRScannedBlocks);
111 _gc_par_phases[ScanHR]->create_thread_work_items("Claimed Chunks:", ScanHRClaimedChunks);
112
113 _gc_par_phases[OptScanHR]->create_thread_work_items("Scanned Cards:", ScanHRScannedCards);
114 _gc_par_phases[OptScanHR]->create_thread_work_items("Scanned Blocks:", ScanHRScannedBlocks);
115 _gc_par_phases[OptScanHR]->create_thread_work_items("Claimed Chunks:", ScanHRClaimedChunks);
116 _gc_par_phases[OptScanHR]->create_thread_work_items("Scanned Refs:", ScanHRScannedOptRefs);
117 _gc_par_phases[OptScanHR]->create_thread_work_items("Used Memory:", ScanHRUsedMemory);
118
119 _gc_par_phases[MergeLB]->create_thread_work_items("Dirty Cards:", MergeLBDirtyCards);
120 _gc_par_phases[MergeLB]->create_thread_work_items("Skipped Cards:", MergeLBSkippedCards);
121
122 _gc_par_phases[MergePSS] = new WorkerDataArray<double>("MergePSS", "Merge Per-Thread State", 1 /* length */, true /* is_serial */);
123
124 _gc_par_phases[MergePSS]->create_thread_work_items("Copied Bytes", MergePSSCopiedBytes, max_gc_threads);
125 _gc_par_phases[MergePSS]->create_thread_work_items("LAB Waste", MergePSSLABWasteBytes, max_gc_threads);
126 _gc_par_phases[MergePSS]->create_thread_work_items("LAB Undo Waste", MergePSSLABUndoWasteBytes, max_gc_threads);
127
128 _gc_par_phases[Termination]->create_thread_work_items("Termination Attempts:");
129
130 _gc_par_phases[OptTermination]->create_thread_work_items("Optional Termination Attempts:");
131
132 if (UseStringDeduplication) {
133 _gc_par_phases[StringDedupQueueFixup] = new WorkerDataArray<double>("StringDedupQueueFixup", "Queue Fixup (ms):", max_gc_threads);
134 _gc_par_phases[StringDedupTableFixup] = new WorkerDataArray<double>("StringDedupTableFixup", "Table Fixup (ms):", max_gc_threads);
135 } else {
136 _gc_par_phases[StringDedupQueueFixup] = NULL;
137 _gc_par_phases[StringDedupTableFixup] = NULL;
138 }
139
140 _gc_par_phases[RedirtyCards] = new WorkerDataArray<double>("RedirtyCards", "Parallel Redirty (ms):", max_gc_threads);
141 _gc_par_phases[RedirtyCards]->create_thread_work_items("Redirtied Cards:");
142
143 _gc_par_phases[ParFreeCSet] = new WorkerDataArray<double>("ParFreeCSet", "Parallel Free Collection Set (ms):", max_gc_threads);
144 _gc_par_phases[YoungFreeCSet] = new WorkerDataArray<double>("YoungFreeCSet", "Young Free Collection Set (ms):", max_gc_threads);
145 _gc_par_phases[NonYoungFreeCSet] = new WorkerDataArray<double>("NonYoungFreeCSet", "Non-Young Free Collection Set (ms):", max_gc_threads);
146 _gc_par_phases[RebuildFreeList] = new WorkerDataArray<double>("RebuildFreeList", "Parallel Rebuild Free List (ms):", max_gc_threads);
147
148 reset();
149 }
150
reset()151 void G1GCPhaseTimes::reset() {
152 _cur_collection_initial_evac_time_ms = 0.0;
153 _cur_optional_evac_time_ms = 0.0;
154 _cur_collection_code_root_fixup_time_ms = 0.0;
155 _cur_strong_code_root_purge_time_ms = 0.0;
156 _cur_merge_heap_roots_time_ms = 0.0;
157 _cur_optional_merge_heap_roots_time_ms = 0.0;
158 _cur_prepare_merge_heap_roots_time_ms = 0.0;
159 _cur_optional_prepare_merge_heap_roots_time_ms = 0.0;
160 _cur_evac_fail_recalc_used = 0.0;
161 _cur_evac_fail_remove_self_forwards = 0.0;
162 _cur_string_deduplication_time_ms = 0.0;
163 _cur_prepare_tlab_time_ms = 0.0;
164 _cur_resize_tlab_time_ms = 0.0;
165 _cur_concatenate_dirty_card_logs_time_ms = 0.0;
166 _cur_derived_pointer_table_update_time_ms = 0.0;
167 _cur_clear_ct_time_ms = 0.0;
168 _cur_expand_heap_time_ms = 0.0;
169 _cur_ref_proc_time_ms = 0.0;
170 _cur_collection_start_sec = 0.0;
171 _root_region_scan_wait_time_ms = 0.0;
172 _external_accounted_time_ms = 0.0;
173 _recorded_prepare_heap_roots_time_ms = 0.0;
174 _recorded_clear_claimed_marks_time_ms = 0.0;
175 _recorded_young_cset_choice_time_ms = 0.0;
176 _recorded_non_young_cset_choice_time_ms = 0.0;
177 _recorded_redirty_logged_cards_time_ms = 0.0;
178 _recorded_preserve_cm_referents_time_ms = 0.0;
179 _recorded_start_new_cset_time_ms = 0.0;
180 _recorded_total_free_cset_time_ms = 0.0;
181 _recorded_serial_free_cset_time_ms = 0.0;
182 _recorded_total_rebuild_freelist_time_ms = 0.0;
183 _recorded_serial_rebuild_freelist_time_ms = 0.0;
184 _cur_fast_reclaim_humongous_time_ms = 0.0;
185 _cur_region_register_time = 0.0;
186 _cur_fast_reclaim_humongous_total = 0;
187 _cur_fast_reclaim_humongous_candidates = 0;
188 _cur_fast_reclaim_humongous_reclaimed = 0;
189 _cur_verify_before_time_ms = 0.0;
190 _cur_verify_after_time_ms = 0.0;
191
192 for (int i = 0; i < GCParPhasesSentinel; i++) {
193 if (_gc_par_phases[i] != NULL) {
194 _gc_par_phases[i]->reset();
195 }
196 }
197
198 _ref_phase_times.reset();
199 _weak_phase_times.reset();
200 }
201
note_gc_start()202 void G1GCPhaseTimes::note_gc_start() {
203 _gc_start_counter = os::elapsed_counter();
204 reset();
205 }
206
207 #define ASSERT_PHASE_UNINITIALIZED(phase) \
208 assert(_gc_par_phases[phase] == NULL || _gc_par_phases[phase]->get(i) == uninitialized, "Phase " #phase " reported for thread that was not started");
209
worker_time(GCParPhases phase,uint worker)210 double G1GCPhaseTimes::worker_time(GCParPhases phase, uint worker) {
211 if (_gc_par_phases[phase] == NULL) {
212 return 0.0;
213 }
214 double value = _gc_par_phases[phase]->get(worker);
215 if (value != WorkerDataArray<double>::uninitialized()) {
216 return value;
217 }
218 return 0.0;
219 }
220
note_gc_end()221 void G1GCPhaseTimes::note_gc_end() {
222 _gc_pause_time_ms = TimeHelper::counter_to_millis(os::elapsed_counter() - _gc_start_counter);
223
224 double uninitialized = WorkerDataArray<double>::uninitialized();
225
226 for (uint i = 0; i < _max_gc_threads; i++) {
227 double worker_start = _gc_par_phases[GCWorkerStart]->get(i);
228 if (worker_start != uninitialized) {
229 assert(_gc_par_phases[GCWorkerEnd]->get(i) != uninitialized, "Worker started but not ended.");
230 double total_worker_time = _gc_par_phases[GCWorkerEnd]->get(i) - _gc_par_phases[GCWorkerStart]->get(i);
231 record_time_secs(GCWorkerTotal, i , total_worker_time);
232
233 double worker_known_time = worker_time(ExtRootScan, i) +
234 worker_time(ScanHR, i) +
235 worker_time(CodeRoots, i) +
236 worker_time(ObjCopy, i) +
237 worker_time(Termination, i);
238
239 record_time_secs(Other, i, total_worker_time - worker_known_time);
240 } else {
241 // Make sure all slots are uninitialized since this thread did not seem to have been started
242 ASSERT_PHASE_UNINITIALIZED(GCWorkerEnd);
243 ASSERT_PHASE_UNINITIALIZED(ExtRootScan);
244 ASSERT_PHASE_UNINITIALIZED(MergeER);
245 ASSERT_PHASE_UNINITIALIZED(MergeRS);
246 ASSERT_PHASE_UNINITIALIZED(OptMergeRS);
247 ASSERT_PHASE_UNINITIALIZED(MergeHCC);
248 ASSERT_PHASE_UNINITIALIZED(MergeLB);
249 ASSERT_PHASE_UNINITIALIZED(ScanHR);
250 ASSERT_PHASE_UNINITIALIZED(CodeRoots);
251 ASSERT_PHASE_UNINITIALIZED(OptCodeRoots);
252 ASSERT_PHASE_UNINITIALIZED(ObjCopy);
253 ASSERT_PHASE_UNINITIALIZED(OptObjCopy);
254 ASSERT_PHASE_UNINITIALIZED(Termination);
255 }
256 }
257 }
258
259 #undef ASSERT_PHASE_UNINITIALIZED
260
261 // record the time a phase took in seconds
record_time_secs(GCParPhases phase,uint worker_id,double secs)262 void G1GCPhaseTimes::record_time_secs(GCParPhases phase, uint worker_id, double secs) {
263 _gc_par_phases[phase]->set(worker_id, secs);
264 }
265
266 // add a number of seconds to a phase
add_time_secs(GCParPhases phase,uint worker_id,double secs)267 void G1GCPhaseTimes::add_time_secs(GCParPhases phase, uint worker_id, double secs) {
268 _gc_par_phases[phase]->add(worker_id, secs);
269 }
270
record_or_add_time_secs(GCParPhases phase,uint worker_id,double secs)271 void G1GCPhaseTimes::record_or_add_time_secs(GCParPhases phase, uint worker_id, double secs) {
272 if (_gc_par_phases[phase]->get(worker_id) == _gc_par_phases[phase]->uninitialized()) {
273 record_time_secs(phase, worker_id, secs);
274 } else {
275 add_time_secs(phase, worker_id, secs);
276 }
277 }
278
get_time_secs(GCParPhases phase,uint worker_id)279 double G1GCPhaseTimes::get_time_secs(GCParPhases phase, uint worker_id) {
280 return _gc_par_phases[phase]->get(worker_id);
281 }
282
record_thread_work_item(GCParPhases phase,uint worker_id,size_t count,uint index)283 void G1GCPhaseTimes::record_thread_work_item(GCParPhases phase, uint worker_id, size_t count, uint index) {
284 _gc_par_phases[phase]->set_thread_work_item(worker_id, count, index);
285 }
286
record_or_add_thread_work_item(GCParPhases phase,uint worker_id,size_t count,uint index)287 void G1GCPhaseTimes::record_or_add_thread_work_item(GCParPhases phase, uint worker_id, size_t count, uint index) {
288 _gc_par_phases[phase]->set_or_add_thread_work_item(worker_id, count, index);
289 }
290
get_thread_work_item(GCParPhases phase,uint worker_id,uint index)291 size_t G1GCPhaseTimes::get_thread_work_item(GCParPhases phase, uint worker_id, uint index) {
292 return _gc_par_phases[phase]->get_thread_work_item(worker_id, index);
293 }
294
295 // return the average time for a phase in milliseconds
average_time_ms(GCParPhases phase)296 double G1GCPhaseTimes::average_time_ms(GCParPhases phase) {
297 if (_gc_par_phases[phase] == NULL) {
298 return 0.0;
299 }
300 return _gc_par_phases[phase]->average() * 1000.0;
301 }
302
sum_thread_work_items(GCParPhases phase,uint index)303 size_t G1GCPhaseTimes::sum_thread_work_items(GCParPhases phase, uint index) {
304 if (_gc_par_phases[phase] == NULL) {
305 return 0;
306 }
307 assert(_gc_par_phases[phase]->thread_work_items(index) != NULL, "No sub count");
308 return _gc_par_phases[phase]->thread_work_items(index)->sum();
309 }
310
311 template <class T>
details(T * phase,const char * indent_str) const312 void G1GCPhaseTimes::details(T* phase, const char* indent_str) const {
313 LogTarget(Trace, gc, phases, task) lt;
314 if (lt.is_enabled()) {
315 LogStream ls(lt);
316 ls.print("%s", indent_str);
317 phase->print_details_on(&ls);
318 }
319 }
320
log_phase(WorkerDataArray<double> * phase,uint indent_level,outputStream * out,bool print_sum) const321 void G1GCPhaseTimes::log_phase(WorkerDataArray<double>* phase, uint indent_level, outputStream* out, bool print_sum) const {
322 out->print("%s", indent(indent_level));
323 phase->print_summary_on(out, print_sum);
324 details(phase, indent(indent_level));
325
326 for (uint i = 0; i < phase->MaxThreadWorkItems; i++) {
327 WorkerDataArray<size_t>* work_items = phase->thread_work_items(i);
328 if (work_items != NULL) {
329 out->print("%s", indent(indent_level + 1));
330 work_items->print_summary_on(out, true);
331 details(work_items, indent(indent_level + 1));
332 }
333 }
334 }
335
debug_phase(WorkerDataArray<double> * phase,uint extra_indent) const336 void G1GCPhaseTimes::debug_phase(WorkerDataArray<double>* phase, uint extra_indent) const {
337 LogTarget(Debug, gc, phases) lt;
338 if (lt.is_enabled()) {
339 ResourceMark rm;
340 LogStream ls(lt);
341 log_phase(phase, 2 + extra_indent, &ls, true);
342 }
343 }
344
trace_phase(WorkerDataArray<double> * phase,bool print_sum,uint extra_indent) const345 void G1GCPhaseTimes::trace_phase(WorkerDataArray<double>* phase, bool print_sum, uint extra_indent) const {
346 LogTarget(Trace, gc, phases) lt;
347 if (lt.is_enabled()) {
348 LogStream ls(lt);
349 log_phase(phase, 3 + extra_indent, &ls, print_sum);
350 }
351 }
352
353 #define TIME_FORMAT "%.1lfms"
354
info_time(const char * name,double value) const355 void G1GCPhaseTimes::info_time(const char* name, double value) const {
356 log_info(gc, phases)("%s%s: " TIME_FORMAT, indent(1), name, value);
357 }
358
debug_time(const char * name,double value) const359 void G1GCPhaseTimes::debug_time(const char* name, double value) const {
360 log_debug(gc, phases)("%s%s: " TIME_FORMAT, indent(2), name, value);
361 }
362
debug_time_for_reference(const char * name,double value) const363 void G1GCPhaseTimes::debug_time_for_reference(const char* name, double value) const {
364 LogTarget(Debug, gc, phases) lt;
365 LogTarget(Debug, gc, phases, ref) lt2;
366
367 if (lt.is_enabled()) {
368 LogStream ls(lt);
369 ls.print_cr("%s%s: " TIME_FORMAT, indent(2), name, value);
370 } else if (lt2.is_enabled()) {
371 LogStream ls(lt2);
372 ls.print_cr("%s%s: " TIME_FORMAT, indent(2), name, value);
373 }
374 }
375
trace_time(const char * name,double value) const376 void G1GCPhaseTimes::trace_time(const char* name, double value) const {
377 log_trace(gc, phases)("%s%s: " TIME_FORMAT, indent(3), name, value);
378 }
379
trace_count(const char * name,size_t value) const380 void G1GCPhaseTimes::trace_count(const char* name, size_t value) const {
381 log_trace(gc, phases)("%s%s: " SIZE_FORMAT, indent(3), name, value);
382 }
383
print_pre_evacuate_collection_set() const384 double G1GCPhaseTimes::print_pre_evacuate_collection_set() const {
385 const double sum_ms = _root_region_scan_wait_time_ms +
386 _cur_prepare_tlab_time_ms +
387 _cur_concatenate_dirty_card_logs_time_ms +
388 _recorded_young_cset_choice_time_ms +
389 _recorded_non_young_cset_choice_time_ms +
390 _cur_region_register_time +
391 _recorded_prepare_heap_roots_time_ms +
392 _recorded_clear_claimed_marks_time_ms;
393
394 info_time("Pre Evacuate Collection Set", sum_ms);
395
396 if (_root_region_scan_wait_time_ms > 0.0) {
397 debug_time("Root Region Scan Waiting", _root_region_scan_wait_time_ms);
398 }
399 debug_time("Prepare TLABs", _cur_prepare_tlab_time_ms);
400 debug_time("Concatenate Dirty Card Logs", _cur_concatenate_dirty_card_logs_time_ms);
401 debug_time("Choose Collection Set", (_recorded_young_cset_choice_time_ms + _recorded_non_young_cset_choice_time_ms));
402 debug_time("Region Register", _cur_region_register_time);
403 if (G1EagerReclaimHumongousObjects) {
404 trace_count("Humongous Total", _cur_fast_reclaim_humongous_total);
405 trace_count("Humongous Candidate", _cur_fast_reclaim_humongous_candidates);
406 }
407
408 debug_time("Prepare Heap Roots", _recorded_prepare_heap_roots_time_ms);
409 if (_recorded_clear_claimed_marks_time_ms > 0.0) {
410 debug_time("Clear Claimed Marks", _recorded_clear_claimed_marks_time_ms);
411 }
412 return sum_ms;
413 }
414
print_evacuate_optional_collection_set() const415 double G1GCPhaseTimes::print_evacuate_optional_collection_set() const {
416 const double sum_ms = _cur_optional_evac_time_ms + _cur_optional_merge_heap_roots_time_ms;
417 if (sum_ms > 0) {
418 info_time("Merge Optional Heap Roots", _cur_optional_merge_heap_roots_time_ms);
419
420 debug_time("Prepare Optional Merge Heap Roots", _cur_optional_prepare_merge_heap_roots_time_ms);
421 debug_phase(_gc_par_phases[OptMergeRS]);
422
423 info_time("Evacuate Optional Collection Set", _cur_optional_evac_time_ms);
424 debug_phase(_gc_par_phases[OptScanHR]);
425 debug_phase(_gc_par_phases[OptObjCopy]);
426 debug_phase(_gc_par_phases[OptCodeRoots]);
427 debug_phase(_gc_par_phases[OptTermination]);
428 }
429 return sum_ms;
430 }
431
print_evacuate_initial_collection_set() const432 double G1GCPhaseTimes::print_evacuate_initial_collection_set() const {
433 info_time("Merge Heap Roots", _cur_merge_heap_roots_time_ms);
434
435 debug_time("Prepare Merge Heap Roots", _cur_prepare_merge_heap_roots_time_ms);
436 debug_phase(_gc_par_phases[MergeER]);
437 debug_phase(_gc_par_phases[MergeRS]);
438 if (G1HotCardCache::default_use_cache()) {
439 debug_phase(_gc_par_phases[MergeHCC]);
440 }
441 debug_phase(_gc_par_phases[MergeLB]);
442
443 info_time("Evacuate Collection Set", _cur_collection_initial_evac_time_ms);
444
445 trace_phase(_gc_par_phases[GCWorkerStart], false);
446 debug_phase(_gc_par_phases[ExtRootScan]);
447 for (int i = ExtRootScanSubPhasesFirst; i <= ExtRootScanSubPhasesLast; i++) {
448 trace_phase(_gc_par_phases[i]);
449 }
450 debug_phase(_gc_par_phases[ScanHR]);
451 debug_phase(_gc_par_phases[CodeRoots]);
452 debug_phase(_gc_par_phases[ObjCopy]);
453 debug_phase(_gc_par_phases[Termination]);
454 debug_phase(_gc_par_phases[Other]);
455 debug_phase(_gc_par_phases[GCWorkerTotal]);
456 trace_phase(_gc_par_phases[GCWorkerEnd], false);
457
458 return _cur_collection_initial_evac_time_ms + _cur_merge_heap_roots_time_ms;
459 }
460
print_post_evacuate_collection_set() const461 double G1GCPhaseTimes::print_post_evacuate_collection_set() const {
462 const double evac_fail_handling = _cur_evac_fail_recalc_used +
463 _cur_evac_fail_remove_self_forwards;
464 assert(_gc_par_phases[MergePSS]->get(0) != WorkerDataArray<double>::uninitialized(), "must be set");
465 const double merge_pss = _gc_par_phases[MergePSS]->get(0) * MILLIUNITS;
466 const double sum_ms = evac_fail_handling +
467 _cur_collection_code_root_fixup_time_ms +
468 _recorded_preserve_cm_referents_time_ms +
469 _cur_ref_proc_time_ms +
470 (_weak_phase_times.total_time_sec() * MILLIUNITS) +
471 _cur_clear_ct_time_ms +
472 merge_pss +
473 _cur_strong_code_root_purge_time_ms +
474 _recorded_redirty_logged_cards_time_ms +
475 _recorded_total_free_cset_time_ms +
476 _recorded_total_rebuild_freelist_time_ms +
477 _cur_fast_reclaim_humongous_time_ms +
478 _cur_expand_heap_time_ms +
479 _cur_string_deduplication_time_ms;
480
481 info_time("Post Evacuate Collection Set", sum_ms);
482
483 debug_time("Code Roots Fixup", _cur_collection_code_root_fixup_time_ms);
484
485 debug_time("Clear Card Table", _cur_clear_ct_time_ms);
486
487 debug_time_for_reference("Reference Processing", _cur_ref_proc_time_ms);
488 _ref_phase_times.print_all_references(2, false);
489 _weak_phase_times.log_print(2);
490
491 if (G1StringDedup::is_enabled()) {
492 debug_time("String Deduplication", _cur_string_deduplication_time_ms);
493 debug_phase(_gc_par_phases[StringDedupQueueFixup], 1);
494 debug_phase(_gc_par_phases[StringDedupTableFixup], 1);
495 }
496
497 if (G1CollectedHeap::heap()->evacuation_failed()) {
498 debug_time("Evacuation Failure", evac_fail_handling);
499 trace_time("Recalculate Used", _cur_evac_fail_recalc_used);
500 trace_time("Remove Self Forwards",_cur_evac_fail_remove_self_forwards);
501 }
502
503 debug_phase(_gc_par_phases[MergePSS], 0);
504 debug_time("Code Roots Purge", _cur_strong_code_root_purge_time_ms);
505
506 debug_time("Redirty Cards", _recorded_redirty_logged_cards_time_ms);
507 trace_phase(_gc_par_phases[RedirtyCards]);
508 #if COMPILER2_OR_JVMCI
509 debug_time("DerivedPointerTable Update", _cur_derived_pointer_table_update_time_ms);
510 #endif
511
512 debug_time("Free Collection Set", _recorded_total_free_cset_time_ms);
513 trace_time("Serial Free Collection Set", _recorded_serial_free_cset_time_ms);
514 trace_phase(_gc_par_phases[ParFreeCSet]);
515 trace_phase(_gc_par_phases[YoungFreeCSet], true, 1);
516 trace_phase(_gc_par_phases[NonYoungFreeCSet], true, 1);
517
518 debug_time("Rebuild Free List", _recorded_total_rebuild_freelist_time_ms);
519 trace_time("Serial Rebuild Free List ", _recorded_serial_rebuild_freelist_time_ms);
520 trace_phase(_gc_par_phases[RebuildFreeList]);
521
522 if (G1EagerReclaimHumongousObjects) {
523 debug_time("Humongous Reclaim", _cur_fast_reclaim_humongous_time_ms);
524 trace_count("Humongous Reclaimed", _cur_fast_reclaim_humongous_reclaimed);
525 }
526 debug_time("Start New Collection Set", _recorded_start_new_cset_time_ms);
527 if (UseTLAB && ResizeTLAB) {
528 debug_time("Resize TLABs", _cur_resize_tlab_time_ms);
529 }
530 debug_time("Expand Heap After Collection", _cur_expand_heap_time_ms);
531
532
533 return sum_ms;
534 }
535
print_other(double accounted_ms) const536 void G1GCPhaseTimes::print_other(double accounted_ms) const {
537 info_time("Other", _gc_pause_time_ms - accounted_ms);
538 }
539
print()540 void G1GCPhaseTimes::print() {
541 note_gc_end();
542
543 if (_cur_verify_before_time_ms > 0.0) {
544 debug_time("Verify Before", _cur_verify_before_time_ms);
545 }
546
547 double accounted_ms = 0.0;
548 accounted_ms += print_pre_evacuate_collection_set();
549 accounted_ms += print_evacuate_initial_collection_set();
550 accounted_ms += print_evacuate_optional_collection_set();
551 accounted_ms += print_post_evacuate_collection_set();
552 print_other(accounted_ms);
553
554 if (_cur_verify_after_time_ms > 0.0) {
555 debug_time("Verify After", _cur_verify_after_time_ms);
556 }
557 }
558
phase_name(GCParPhases phase)559 const char* G1GCPhaseTimes::phase_name(GCParPhases phase) {
560 G1GCPhaseTimes* phase_times = G1CollectedHeap::heap()->phase_times();
561 return phase_times->_gc_par_phases[phase]->short_name();
562 }
563
G1EvacPhaseWithTrimTimeTracker(G1ParScanThreadState * pss,Tickspan & total_time,Tickspan & trim_time)564 G1EvacPhaseWithTrimTimeTracker::G1EvacPhaseWithTrimTimeTracker(G1ParScanThreadState* pss, Tickspan& total_time, Tickspan& trim_time) :
565 _pss(pss),
566 _start(Ticks::now()),
567 _total_time(total_time),
568 _trim_time(trim_time),
569 _stopped(false) {
570
571 assert(_pss->trim_ticks().value() == 0, "Possibly remaining trim ticks left over from previous use");
572 }
573
~G1EvacPhaseWithTrimTimeTracker()574 G1EvacPhaseWithTrimTimeTracker::~G1EvacPhaseWithTrimTimeTracker() {
575 if (!_stopped) {
576 stop();
577 }
578 }
579
stop()580 void G1EvacPhaseWithTrimTimeTracker::stop() {
581 assert(!_stopped, "Should only be called once");
582 _total_time += (Ticks::now() - _start) - _pss->trim_ticks();
583 _trim_time += _pss->trim_ticks();
584 _pss->reset_trim_ticks();
585 _stopped = true;
586 }
587
G1GCParPhaseTimesTracker(G1GCPhaseTimes * phase_times,G1GCPhaseTimes::GCParPhases phase,uint worker_id,bool must_record)588 G1GCParPhaseTimesTracker::G1GCParPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1GCPhaseTimes::GCParPhases phase, uint worker_id, bool must_record) :
589 _start_time(), _phase(phase), _phase_times(phase_times), _worker_id(worker_id), _event(), _must_record(must_record) {
590 if (_phase_times != NULL) {
591 _start_time = Ticks::now();
592 }
593 }
594
~G1GCParPhaseTimesTracker()595 G1GCParPhaseTimesTracker::~G1GCParPhaseTimesTracker() {
596 if (_phase_times != NULL) {
597 if (_must_record) {
598 _phase_times->record_time_secs(_phase, _worker_id, (Ticks::now() - _start_time).seconds());
599 } else {
600 _phase_times->record_or_add_time_secs(_phase, _worker_id, (Ticks::now() - _start_time).seconds());
601 }
602 _event.commit(GCId::current(), _worker_id, G1GCPhaseTimes::phase_name(_phase));
603 }
604 }
605
G1EvacPhaseTimesTracker(G1GCPhaseTimes * phase_times,G1ParScanThreadState * pss,G1GCPhaseTimes::GCParPhases phase,uint worker_id)606 G1EvacPhaseTimesTracker::G1EvacPhaseTimesTracker(G1GCPhaseTimes* phase_times,
607 G1ParScanThreadState* pss,
608 G1GCPhaseTimes::GCParPhases phase,
609 uint worker_id) :
610 G1GCParPhaseTimesTracker(phase_times, phase, worker_id),
611 _total_time(),
612 _trim_time(),
613 _trim_tracker(pss, _total_time, _trim_time) {
614 }
615
~G1EvacPhaseTimesTracker()616 G1EvacPhaseTimesTracker::~G1EvacPhaseTimesTracker() {
617 if (_phase_times != NULL) {
618 // Explicitly stop the trim tracker since it's not yet destructed.
619 _trim_tracker.stop();
620 // Exclude trim time by increasing the start time.
621 _start_time += _trim_time;
622 _phase_times->record_or_add_time_secs(G1GCPhaseTimes::ObjCopy, _worker_id, _trim_time.seconds());
623 }
624 }
625
626