1 /*
2 * Copyright (c) 2013, 2023, 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/g1ParScanThreadState.inline.hpp"
30 #include "gc/shared/gcTimer.hpp"
31 #include "gc/shared/oopStorage.hpp"
32 #include "gc/shared/oopStorageSet.hpp"
33 #include "gc/shared/tlab_globals.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/enumIterator.hpp"
41 #include "utilities/macros.hpp"
42
43 constexpr const char* G1GCPhaseTimes::GCMergeRSWorkItemsStrings[];
44
45 G1GCPhaseTimes::G1GCPhaseTimes(STWGCTimer* gc_timer, uint max_gc_threads) :
46 _max_gc_threads(max_gc_threads),
47 _gc_start_counter(0),
48 _gc_pause_time_ms(0.0),
49 _ref_phase_times(gc_timer, max_gc_threads),
50 _weak_phase_times(max_gc_threads)
51 {
52 assert(max_gc_threads > 0, "Must have some GC threads");
53
54 _gc_par_phases[RetireTLABsAndFlushLogs] = new WorkerDataArray<double>("RetireTLABsAndFlushLogs", "JT Retire TLABs And Flush Logs (ms):", max_gc_threads);
55 _gc_par_phases[NonJavaThreadFlushLogs] = new WorkerDataArray<double>("NonJavaThreadFlushLogs", "Non-JT Flush Logs (ms):", max_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 _gc_par_phases[CMRefRoots] = new WorkerDataArray<double>("CMRefRoots", "CM RefProcessor Roots (ms):", max_gc_threads);
64
65 for (auto id : EnumRange<OopStorageSet::StrongId>()) {
66 GCParPhases phase = strong_oopstorage_phase(id);
67 const char* phase_name_postfix = " Roots (ms):";
68 const char* storage_name = OopStorageSet::storage(id)->name();
69 char* oop_storage_phase_name = NEW_C_HEAP_ARRAY(char, strlen(phase_name_postfix) + strlen(storage_name) + 1, mtGC);
70 strcpy(oop_storage_phase_name, storage_name);
71 strcat(oop_storage_phase_name, phase_name_postfix);
72 _gc_par_phases[phase] = new WorkerDataArray<double>(storage_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 for (uint i = 0; i < MergeRSContainersSentinel; i++) {
79 _gc_par_phases[MergeRS]->create_thread_work_items(GCMergeRSWorkItemsStrings[i], i);
80 }
81
82 _gc_par_phases[OptMergeRS] = new WorkerDataArray<double>("OptMergeRS", "Optional Remembered Sets (ms):", max_gc_threads);
83 for (uint i = 0; i < MergeRSContainersSentinel; i++) {
84 _gc_par_phases[OptMergeRS]->create_thread_work_items(GCMergeRSWorkItemsStrings[i], i);
85 }
86
87 _gc_par_phases[MergeLB] = new WorkerDataArray<double>("MergeLB", "Log Buffers (ms):", max_gc_threads);
88 _gc_par_phases[ScanHR] = new WorkerDataArray<double>("ScanHR", "Scan Heap Roots (ms):", max_gc_threads);
89 _gc_par_phases[OptScanHR] = new WorkerDataArray<double>("OptScanHR", "Optional Scan Heap Roots (ms):", max_gc_threads);
90 _gc_par_phases[CodeRoots] = new WorkerDataArray<double>("CodeRoots", "Code Root Scan (ms):", max_gc_threads);
91 _gc_par_phases[OptCodeRoots] = new WorkerDataArray<double>("OptCodeRoots", "Optional Code Root Scan (ms):", max_gc_threads);
92 _gc_par_phases[ObjCopy] = new WorkerDataArray<double>("ObjCopy", "Object Copy (ms):", max_gc_threads);
93 _gc_par_phases[OptObjCopy] = new WorkerDataArray<double>("OptObjCopy", "Optional Object Copy (ms):", max_gc_threads);
94 _gc_par_phases[Termination] = new WorkerDataArray<double>("Termination", "Termination (ms):", max_gc_threads);
95 _gc_par_phases[OptTermination] = new WorkerDataArray<double>("OptTermination", "Optional Termination (ms):", max_gc_threads);
96 _gc_par_phases[GCWorkerTotal] = new WorkerDataArray<double>("GCWorkerTotal", "GC Worker Total (ms):", max_gc_threads);
97 _gc_par_phases[GCWorkerEnd] = new WorkerDataArray<double>("GCWorkerEnd", "GC Worker End (ms):", max_gc_threads);
98 _gc_par_phases[Other] = new WorkerDataArray<double>("Other", "GC Worker Other (ms):", max_gc_threads);
99 _gc_par_phases[MergePSS] = new WorkerDataArray<double>("MergePSS", "Merge Per-Thread State (ms):", max_gc_threads);
100 _gc_par_phases[RestoreEvacuationFailedRegions] = new WorkerDataArray<double>("RestoreEvacuationFailedRegions", "Restore Evacuation Failed Regions (ms):", max_gc_threads);
101 _gc_par_phases[RemoveSelfForwards] = new WorkerDataArray<double>("RemoveSelfForwards", "Remove Self Forwards (ms):", max_gc_threads);
102 _gc_par_phases[ClearCardTable] = new WorkerDataArray<double>("ClearLoggedCards", "Clear Logged Cards (ms):", max_gc_threads);
103 _gc_par_phases[RecalculateUsed] = new WorkerDataArray<double>("RecalculateUsed", "Recalculate Used Memory (ms):", max_gc_threads);
104 #if COMPILER2_OR_JVMCI
105 _gc_par_phases[UpdateDerivedPointers] = new WorkerDataArray<double>("UpdateDerivedPointers", "Update Derived Pointers (ms):", max_gc_threads);
106 #endif
107 _gc_par_phases[EagerlyReclaimHumongousObjects] = new WorkerDataArray<double>("EagerlyReclaimHumongousObjects", "Eagerly Reclaim Humongous Objects (ms):", max_gc_threads);
108 _gc_par_phases[ProcessEvacuationFailedRegions] = new WorkerDataArray<double>("ProcessEvacuationFailedRegions", "Process Evacuation Failed Regions (ms):", max_gc_threads);
109
110 _gc_par_phases[ScanHR]->create_thread_work_items("Scanned Cards:", ScanHRScannedCards);
111 _gc_par_phases[ScanHR]->create_thread_work_items("Scanned Blocks:", ScanHRScannedBlocks);
112 _gc_par_phases[ScanHR]->create_thread_work_items("Claimed Chunks:", ScanHRClaimedChunks);
113 _gc_par_phases[ScanHR]->create_thread_work_items("Found Roots:", ScanHRFoundRoots);
114
115 _gc_par_phases[OptScanHR]->create_thread_work_items("Scanned Cards:", ScanHRScannedCards);
116 _gc_par_phases[OptScanHR]->create_thread_work_items("Scanned Blocks:", ScanHRScannedBlocks);
117 _gc_par_phases[OptScanHR]->create_thread_work_items("Claimed Chunks:", ScanHRClaimedChunks);
118 _gc_par_phases[OptScanHR]->create_thread_work_items("Found Roots:", ScanHRFoundRoots);
119 _gc_par_phases[OptScanHR]->create_thread_work_items("Scanned Refs:", ScanHRScannedOptRefs);
120 _gc_par_phases[OptScanHR]->create_thread_work_items("Used Memory:", ScanHRUsedMemory);
121
122 _gc_par_phases[MergeLB]->create_thread_work_items("Dirty Cards:", MergeLBDirtyCards);
123 _gc_par_phases[MergeLB]->create_thread_work_items("Skipped Cards:", MergeLBSkippedCards);
124
125 _gc_par_phases[CodeRoots]->create_thread_work_items("Scanned Nmethods:", CodeRootsScannedNMethods);
126
127 _gc_par_phases[OptCodeRoots]->create_thread_work_items("Scanned Nmethods:", CodeRootsScannedNMethods);
128
129 _gc_par_phases[MergePSS]->create_thread_work_items("Copied Bytes:", MergePSSCopiedBytes);
130 _gc_par_phases[MergePSS]->create_thread_work_items("LAB Waste:", MergePSSLABWasteBytes);
131 _gc_par_phases[MergePSS]->create_thread_work_items("LAB Undo Waste:", MergePSSLABUndoWasteBytes);
132 _gc_par_phases[MergePSS]->create_thread_work_items("Evac Fail Extra Cards:", MergePSSEvacFailExtra);
133
134 _gc_par_phases[RestoreEvacuationFailedRegions]->create_thread_work_items("Evacuation Failed Regions:", RestoreEvacFailureRegionsEvacFailedNum);
135 _gc_par_phases[RestoreEvacuationFailedRegions]->create_thread_work_items("Pinned Regions:", RestoreEvacFailureRegionsPinnedNum);
136 _gc_par_phases[RestoreEvacuationFailedRegions]->create_thread_work_items("Allocation Failed Regions:", RestoreEvacFailureRegionsAllocFailedNum);
137
138 _gc_par_phases[RemoveSelfForwards]->create_thread_work_items("Forward Chunks:", RemoveSelfForwardChunksNum);
139 _gc_par_phases[RemoveSelfForwards]->create_thread_work_items("Empty Forward Chunks:", RemoveSelfForwardEmptyChunksNum);
140 _gc_par_phases[RemoveSelfForwards]->create_thread_work_items("Forward Objects:", RemoveSelfForwardObjectsNum);
141 _gc_par_phases[RemoveSelfForwards]->create_thread_work_items("Forward Bytes:", RemoveSelfForwardObjectsBytes);
142
143 _gc_par_phases[EagerlyReclaimHumongousObjects]->create_thread_work_items("Humongous Total:", EagerlyReclaimNumTotal);
144 _gc_par_phases[EagerlyReclaimHumongousObjects]->create_thread_work_items("Humongous Candidates:", EagerlyReclaimNumCandidates);
145 _gc_par_phases[EagerlyReclaimHumongousObjects]->create_thread_work_items("Humongous Reclaimed:", EagerlyReclaimNumReclaimed);
146
147 _gc_par_phases[SampleCollectionSetCandidates] = new WorkerDataArray<double>("SampleCandidates", "Sample CSet Candidates (ms):", max_gc_threads);
148
149 _gc_par_phases[Termination]->create_thread_work_items("Termination Attempts:");
150
151 _gc_par_phases[OptTermination]->create_thread_work_items("Optional Termination Attempts:");
152
153 _gc_par_phases[RedirtyCards] = new WorkerDataArray<double>("RedirtyCards", "Redirty Logged Cards (ms):", max_gc_threads);
154 _gc_par_phases[RedirtyCards]->create_thread_work_items("Redirtied Cards:");
155
156 _gc_par_phases[ResizeThreadLABs] = new WorkerDataArray<double>("ResizeTLABs", "Resize TLABs (ms):", max_gc_threads);
157
158 _gc_par_phases[FreeCollectionSet] = new WorkerDataArray<double>("FreeCSet", "Free Collection Set (ms):", max_gc_threads);
159 _gc_par_phases[YoungFreeCSet] = new WorkerDataArray<double>("YoungFreeCSet", "Young Free Collection Set (ms):", max_gc_threads);
160 _gc_par_phases[NonYoungFreeCSet] = new WorkerDataArray<double>("NonYoungFreeCSet", "Non-Young Free Collection Set (ms):", max_gc_threads);
161 _gc_par_phases[RebuildFreeList] = new WorkerDataArray<double>("RebuildFreeList", "Parallel Rebuild Free List (ms):", max_gc_threads);
162
163 _gc_par_phases[ResetMarkingState] = new WorkerDataArray<double>("ResetMarkingState", "Reset Marking State (ms):", max_gc_threads);
164 _gc_par_phases[NoteStartOfMark] = new WorkerDataArray<double>("NoteStartOfMark", "Note Start Of Mark (ms):", max_gc_threads);
165
166 reset();
167 }
168
169 void G1GCPhaseTimes::reset() {
170 _cur_collection_initial_evac_time_ms = 0.0;
171 _cur_optional_evac_time_ms = 0.0;
172 _cur_collection_nmethod_list_cleanup_time_ms = 0.0;
173 _cur_merge_heap_roots_time_ms = 0.0;
174 _cur_optional_merge_heap_roots_time_ms = 0.0;
175 _cur_prepare_merge_heap_roots_time_ms = 0.0;
176 _cur_distribute_log_buffers_time_ms = 0.0;
177 _cur_optional_prepare_merge_heap_roots_time_ms = 0.0;
178 _cur_pre_evacuate_prepare_time_ms = 0.0;
179 _cur_post_evacuate_cleanup_1_time_ms = 0.0;
180 _cur_post_evacuate_cleanup_2_time_ms = 0.0;
181 _cur_expand_heap_time_ms = 0.0;
182 _cur_ref_proc_time_ms = 0.0;
183 _cur_collection_start_sec = 0.0;
184 _root_region_scan_wait_time_ms = 0.0;
185 _external_accounted_time_ms = 0.0;
186 _recorded_prepare_heap_roots_time_ms = 0.0;
187 _recorded_young_cset_choice_time_ms = 0.0;
188 _recorded_non_young_cset_choice_time_ms = 0.0;
189 _recorded_prepare_for_mutator_time_ms = 0.0;
190 _recorded_serial_free_cset_time_ms = 0.0;
191 _recorded_total_rebuild_freelist_time_ms = 0.0;
192 _recorded_serial_rebuild_freelist_time_ms = 0.0;
193 _cur_region_register_time = 0.0;
194 _cur_verify_before_time_ms = 0.0;
195 _cur_verify_after_time_ms = 0.0;
196
197 for (int i = 0; i < GCParPhasesSentinel; i++) {
198 if (_gc_par_phases[i] != nullptr) {
199 _gc_par_phases[i]->reset();
200 }
201 }
202
203 _ref_phase_times.reset();
204 _weak_phase_times.reset();
205 }
206
207 void G1GCPhaseTimes::record_gc_pause_start() {
208 _gc_start_counter = os::elapsed_counter();
209 reset();
210 }
211
212 #define ASSERT_PHASE_UNINITIALIZED(phase) \
213 assert(_gc_par_phases[phase] == nullptr || _gc_par_phases[phase]->get(i) == uninitialized, "Phase " #phase " reported for thread that was not started");
214
215 double G1GCPhaseTimes::worker_time(GCParPhases phase, uint worker) {
216 if (_gc_par_phases[phase] == nullptr) {
217 return 0.0;
218 }
219 double value = _gc_par_phases[phase]->get(worker);
220 if (value != WorkerDataArray<double>::uninitialized()) {
221 return value;
222 }
223 return 0.0;
224 }
225
226 void G1GCPhaseTimes::record_gc_pause_end() {
227 _gc_pause_time_ms = TimeHelper::counter_to_millis(os::elapsed_counter() - _gc_start_counter);
228
229 double uninitialized = WorkerDataArray<double>::uninitialized();
230
231 for (uint i = 0; i < _max_gc_threads; i++) {
232 double worker_start = _gc_par_phases[GCWorkerStart]->get(i);
233 if (worker_start != uninitialized) {
234 assert(_gc_par_phases[GCWorkerEnd]->get(i) != uninitialized, "Worker started but not ended.");
235 double total_worker_time = _gc_par_phases[GCWorkerEnd]->get(i) - _gc_par_phases[GCWorkerStart]->get(i);
236 record_time_secs(GCWorkerTotal, i , total_worker_time);
237
238 double worker_known_time = worker_time(ExtRootScan, i) +
239 worker_time(ScanHR, i) +
240 worker_time(CodeRoots, i) +
241 worker_time(ObjCopy, i) +
242 worker_time(Termination, i);
243
244 record_time_secs(Other, i, total_worker_time - worker_known_time);
245 } else {
246 // Make sure all slots are uninitialized since this thread did not seem to have been started
247 ASSERT_PHASE_UNINITIALIZED(GCWorkerEnd);
248 ASSERT_PHASE_UNINITIALIZED(ExtRootScan);
249 ASSERT_PHASE_UNINITIALIZED(MergeER);
250 ASSERT_PHASE_UNINITIALIZED(MergeRS);
251 ASSERT_PHASE_UNINITIALIZED(OptMergeRS);
252 ASSERT_PHASE_UNINITIALIZED(MergeLB);
253 ASSERT_PHASE_UNINITIALIZED(ScanHR);
254 ASSERT_PHASE_UNINITIALIZED(CodeRoots);
255 ASSERT_PHASE_UNINITIALIZED(OptCodeRoots);
256 ASSERT_PHASE_UNINITIALIZED(ObjCopy);
257 ASSERT_PHASE_UNINITIALIZED(OptObjCopy);
258 ASSERT_PHASE_UNINITIALIZED(Termination);
259 }
260 }
261 }
262
263 #undef ASSERT_PHASE_UNINITIALIZED
264
265 // record the time a phase took in seconds
266 void G1GCPhaseTimes::record_time_secs(GCParPhases phase, uint worker_id, double secs) {
267 _gc_par_phases[phase]->set(worker_id, secs);
268 }
269
270 // add a number of seconds to a phase
271 void G1GCPhaseTimes::add_time_secs(GCParPhases phase, uint worker_id, double secs) {
272 _gc_par_phases[phase]->add(worker_id, secs);
273 }
274
275 void G1GCPhaseTimes::record_or_add_time_secs(GCParPhases phase, uint worker_id, double secs) {
276 _gc_par_phases[phase]->set_or_add(worker_id, secs);
277 }
278
279 double G1GCPhaseTimes::get_time_secs(GCParPhases phase, uint worker_id) {
280 return _gc_par_phases[phase]->get(worker_id);
281 }
282
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
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
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
296 double G1GCPhaseTimes::average_time_ms(GCParPhases phase) const {
297 if (_gc_par_phases[phase] == nullptr) {
298 return 0.0;
299 }
300 return _gc_par_phases[phase]->average() * 1000.0;
301 }
302
303 size_t G1GCPhaseTimes::sum_thread_work_items(GCParPhases phase, uint index) {
304 if (_gc_par_phases[phase] == nullptr) {
305 return 0;
306 }
307 assert(_gc_par_phases[phase]->thread_work_items(index) != nullptr, "No sub count");
308 return _gc_par_phases[phase]->thread_work_items(index)->sum();
309 }
310
311 template <class T>
312 void G1GCPhaseTimes::details(T* phase, uint indent_level) const {
313 LogTarget(Trace, gc, phases, task) lt;
314 if (lt.is_enabled()) {
315 LogStream ls(lt);
316 ls.sp(indent_level * 2);
317 phase->print_details_on(&ls);
318 }
319 }
320
321 void G1GCPhaseTimes::print_thread_work_items(WorkerDataArray<double>* phase, uint indent_level, outputStream* out) const {
322 for (uint i = 0; i < phase->MaxThreadWorkItems; i++) {
323 WorkerDataArray<size_t>* work_items = phase->thread_work_items(i);
324 if (work_items != nullptr) {
325 out->sp((indent_level + 1) * 2);
326 work_items->print_summary_on(out, true);
327 details(work_items, indent_level + 1);
328 }
329 }
330 }
331
332 void G1GCPhaseTimes::debug_phase_merge_remset() const {
333 LogTarget(Debug, gc, phases) lt;
334 if (!lt.is_enabled()) {
335 return;
336 }
337
338 ResourceMark rm;
339 LogStream ls(lt);
340
341 WorkerDataArray<double>* phase = _gc_par_phases[MergeRS];
342 WorkerDataArray<double>* sub_phase = _gc_par_phases[MergeER];
343
344 uint indent_level = 2;
345
346 ls.sp(indent_level * 2);
347 phase->print_summary_on(&ls, true);
348 details(phase, indent_level);
349
350 log_phase(sub_phase, (indent_level + 1), &ls, true);
351
352 print_thread_work_items(phase, indent_level, &ls);
353 }
354
355 void G1GCPhaseTimes::log_phase(WorkerDataArray<double>* phase, uint indent_level, outputStream* out, bool print_sum) const {
356 out->sp(indent_level * 2);
357 phase->print_summary_on(out, print_sum);
358 details(phase, indent_level);
359
360 print_thread_work_items(phase, indent_level, out);
361 }
362
363 void G1GCPhaseTimes::debug_phase(WorkerDataArray<double>* phase, uint extra_indent) const {
364 LogTarget(Debug, gc, phases) lt;
365 if (lt.is_enabled()) {
366 LogStream ls(lt);
367 log_phase(phase, 2 + extra_indent, &ls, true);
368 }
369 }
370
371 void G1GCPhaseTimes::trace_phase(WorkerDataArray<double>* phase, bool print_sum, uint extra_indent) const {
372 LogTarget(Trace, gc, phases) lt;
373 if (lt.is_enabled()) {
374 LogStream ls(lt);
375 log_phase(phase, 3 + extra_indent, &ls, print_sum);
376 }
377 }
378
379 #define TIME_FORMAT "%.2lfms"
380
381 void G1GCPhaseTimes::info_time(const char* name, double value) const {
382 log_info(gc, phases)(" %s: " TIME_FORMAT, name, value);
383 }
384
385 void G1GCPhaseTimes::debug_time(const char* name, double value) const {
386 log_debug(gc, phases)(" %s: " TIME_FORMAT, name, value);
387 }
388
389 void G1GCPhaseTimes::debug_time_for_reference(const char* name, double value) const {
390 LogTarget(Debug, gc, phases) lt;
391 LogTarget(Debug, gc, phases, ref) lt2;
392
393 if (lt.is_enabled()) {
394 LogStream ls(lt);
395 ls.print_cr(" %s: " TIME_FORMAT, name, value);
396 } else if (lt2.is_enabled()) {
397 LogStream ls(lt2);
398 ls.print_cr(" %s: " TIME_FORMAT, name, value);
399 }
400 }
401
402 void G1GCPhaseTimes::trace_time(const char* name, double value) const {
403 log_trace(gc, phases)(" %s: " TIME_FORMAT, name, value);
404 }
405
406 void G1GCPhaseTimes::trace_count(const char* name, size_t value) const {
407 log_trace(gc, phases)(" %s: " SIZE_FORMAT, name, value);
408 }
409
410 double G1GCPhaseTimes::print_pre_evacuate_collection_set() const {
411 const double pre_concurrent_start_ms = average_time_ms(ResetMarkingState) +
412 average_time_ms(NoteStartOfMark);
413
414 const double sum_ms = pre_concurrent_start_ms +
415 _cur_pre_evacuate_prepare_time_ms +
416 _recorded_young_cset_choice_time_ms +
417 _recorded_non_young_cset_choice_time_ms +
418 _cur_region_register_time +
419 _recorded_prepare_heap_roots_time_ms;
420
421 info_time("Pre Evacuate Collection Set", sum_ms);
422
423 if (pre_concurrent_start_ms > 0.0) {
424 debug_phase(_gc_par_phases[ResetMarkingState]);
425 debug_phase(_gc_par_phases[NoteStartOfMark]);
426 }
427
428 debug_time("Pre Evacuate Prepare", _cur_pre_evacuate_prepare_time_ms);
429 debug_phase(_gc_par_phases[RetireTLABsAndFlushLogs], 1);
430 debug_phase(_gc_par_phases[NonJavaThreadFlushLogs], 1);
431 debug_time("Choose Collection Set", (_recorded_young_cset_choice_time_ms + _recorded_non_young_cset_choice_time_ms));
432 debug_time("Region Register", _cur_region_register_time);
433
434 debug_time("Prepare Heap Roots", _recorded_prepare_heap_roots_time_ms);
435
436 return sum_ms;
437 }
438
439 double G1GCPhaseTimes::print_evacuate_optional_collection_set() const {
440 const double sum_ms = _cur_optional_evac_time_ms + _cur_optional_merge_heap_roots_time_ms;
441 if (sum_ms > 0) {
442 info_time("Merge Optional Heap Roots", _cur_optional_merge_heap_roots_time_ms);
443
444 debug_time("Prepare Optional Merge Heap Roots", _cur_optional_prepare_merge_heap_roots_time_ms);
445 debug_phase(_gc_par_phases[OptMergeRS]);
446
447 info_time("Evacuate Optional Collection Set", _cur_optional_evac_time_ms);
448 debug_phase(_gc_par_phases[OptScanHR]);
449 debug_phase(_gc_par_phases[OptObjCopy]);
450 debug_phase(_gc_par_phases[OptCodeRoots]);
451 debug_phase(_gc_par_phases[OptTermination]);
452 }
453 return sum_ms;
454 }
455
456 double G1GCPhaseTimes::print_evacuate_initial_collection_set() const {
457 info_time("Merge Heap Roots", _cur_merge_heap_roots_time_ms);
458
459 debug_time("Prepare Merge Heap Roots", _cur_prepare_merge_heap_roots_time_ms);
460 debug_phase_merge_remset();
461
462 debug_time("Distribute Log Buffers", _cur_distribute_log_buffers_time_ms);
463 debug_phase(_gc_par_phases[MergeLB]);
464
465 info_time("Evacuate Collection Set", _cur_collection_initial_evac_time_ms);
466
467 trace_phase(_gc_par_phases[GCWorkerStart], false);
468 debug_phase(_gc_par_phases[ExtRootScan]);
469 for (int i = ExtRootScanSubPhasesFirst; i <= ExtRootScanSubPhasesLast; i++) {
470 trace_phase(_gc_par_phases[i]);
471 }
472 debug_phase(_gc_par_phases[ScanHR]);
473 debug_phase(_gc_par_phases[CodeRoots]);
474 debug_phase(_gc_par_phases[ObjCopy]);
475 debug_phase(_gc_par_phases[Termination]);
476 debug_phase(_gc_par_phases[Other]);
477 debug_phase(_gc_par_phases[GCWorkerTotal]);
478 trace_phase(_gc_par_phases[GCWorkerEnd], false);
479
480 return _cur_collection_initial_evac_time_ms + _cur_merge_heap_roots_time_ms;
481 }
482
483 double G1GCPhaseTimes::print_post_evacuate_collection_set(bool evacuation_failed) const {
484 const double sum_ms = _cur_collection_nmethod_list_cleanup_time_ms +
485 _cur_ref_proc_time_ms +
486 (_weak_phase_times.total_time_sec() * MILLIUNITS) +
487 _cur_post_evacuate_cleanup_1_time_ms +
488 _cur_post_evacuate_cleanup_2_time_ms +
489 _recorded_total_rebuild_freelist_time_ms +
490 _recorded_prepare_for_mutator_time_ms +
491 _cur_expand_heap_time_ms;
492
493 info_time("Post Evacuate Collection Set", sum_ms);
494
495 debug_time("NMethod List Cleanup", _cur_collection_nmethod_list_cleanup_time_ms);
496
497 debug_time_for_reference("Reference Processing", _cur_ref_proc_time_ms);
498 _ref_phase_times.print_all_references(2, false);
499 _weak_phase_times.log_total(2);
500 _weak_phase_times.log_subtotals(3);
501
502 debug_time("Post Evacuate Cleanup 1", _cur_post_evacuate_cleanup_1_time_ms);
503 debug_phase(_gc_par_phases[MergePSS], 1);
504 debug_phase(_gc_par_phases[ClearCardTable], 1);
505 debug_phase(_gc_par_phases[RecalculateUsed], 1);
506 if (evacuation_failed) {
507 debug_phase(_gc_par_phases[RestoreEvacuationFailedRegions], 1);
508 debug_phase(_gc_par_phases[RemoveSelfForwards], 2);
509 }
510
511 debug_time("Post Evacuate Cleanup 2", _cur_post_evacuate_cleanup_2_time_ms);
512 if (evacuation_failed) {
513 debug_phase(_gc_par_phases[RecalculateUsed], 1);
514 debug_phase(_gc_par_phases[ProcessEvacuationFailedRegions], 1);
515 }
516 #if COMPILER2_OR_JVMCI
517 debug_phase(_gc_par_phases[UpdateDerivedPointers], 1);
518 #endif
519 debug_phase(_gc_par_phases[EagerlyReclaimHumongousObjects], 1);
520
521 if (G1CollectedHeap::heap()->should_sample_collection_set_candidates()) {
522 debug_phase(_gc_par_phases[SampleCollectionSetCandidates], 1);
523 }
524 debug_phase(_gc_par_phases[RedirtyCards], 1);
525 if (UseTLAB && ResizeTLAB) {
526 debug_phase(_gc_par_phases[ResizeThreadLABs], 1);
527 }
528 debug_phase(_gc_par_phases[FreeCollectionSet], 1);
529 trace_phase(_gc_par_phases[YoungFreeCSet], true, 1);
530 trace_phase(_gc_par_phases[NonYoungFreeCSet], true, 1);
531
532 trace_time("Serial Free Collection Set", _recorded_serial_free_cset_time_ms);
533
534 debug_time("Rebuild Free List", _recorded_total_rebuild_freelist_time_ms);
535 trace_time("Serial Rebuild Free List", _recorded_serial_rebuild_freelist_time_ms);
536 trace_phase(_gc_par_phases[RebuildFreeList]);
537
538 debug_time("Prepare For Mutator", _recorded_prepare_for_mutator_time_ms);
539 debug_time("Expand Heap After Collection", _cur_expand_heap_time_ms);
540
541 return sum_ms;
542 }
543
544 void G1GCPhaseTimes::print_other(double accounted_ms) const {
545 info_time("Other", _gc_pause_time_ms - accounted_ms);
546 }
547
548 void G1GCPhaseTimes::print(bool evacuation_failed) {
549 if (_root_region_scan_wait_time_ms > 0.0) {
550 debug_time("Root Region Scan Waiting", _root_region_scan_wait_time_ms);
551 }
552
553 // Check if some time has been recorded for verification and only then print
554 // the message. We do not use Verify*GC here to print because VerifyGCType
555 // further limits actual verification.
556 if (_cur_verify_before_time_ms > 0.0) {
557 debug_time("Verify Before", _cur_verify_before_time_ms);
558 }
559
560 double accounted_ms = 0.0;
561
562 accounted_ms += _root_region_scan_wait_time_ms;
563 accounted_ms += _cur_verify_before_time_ms;
564
565 accounted_ms += print_pre_evacuate_collection_set();
566 accounted_ms += print_evacuate_initial_collection_set();
567 accounted_ms += print_evacuate_optional_collection_set();
568 accounted_ms += print_post_evacuate_collection_set(evacuation_failed);
569
570 accounted_ms += _cur_verify_after_time_ms;
571
572 print_other(accounted_ms);
573
574 // See above comment on the _cur_verify_before_time_ms check.
575 if (_cur_verify_after_time_ms > 0.0) {
576 debug_time("Verify After", _cur_verify_after_time_ms);
577 }
578 }
579
580 const char* G1GCPhaseTimes::phase_name(GCParPhases phase) {
581 G1GCPhaseTimes* phase_times = G1CollectedHeap::heap()->phase_times();
582 return phase_times->_gc_par_phases[phase]->short_name();
583 }
584
585 G1EvacPhaseWithTrimTimeTracker::G1EvacPhaseWithTrimTimeTracker(G1ParScanThreadState* pss, Tickspan& total_time, Tickspan& trim_time) :
586 _pss(pss),
587 _start(Ticks::now()),
588 _total_time(total_time),
589 _trim_time(trim_time),
590 _stopped(false) {
591
592 assert(_pss->trim_ticks().value() == 0, "Possibly remaining trim ticks left over from previous use");
593 }
594
595 G1EvacPhaseWithTrimTimeTracker::~G1EvacPhaseWithTrimTimeTracker() {
596 if (!_stopped) {
597 stop();
598 }
599 }
600
601 void G1EvacPhaseWithTrimTimeTracker::stop() {
602 assert(!_stopped, "Should only be called once");
603 _total_time += (Ticks::now() - _start) - _pss->trim_ticks();
604 _trim_time += _pss->trim_ticks();
605 _pss->reset_trim_ticks();
606 _stopped = true;
607 }
608
609 G1GCParPhaseTimesTracker::G1GCParPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1GCPhaseTimes::GCParPhases phase, uint worker_id, bool allow_multiple_record) :
610 _start_time(), _phase(phase), _phase_times(phase_times), _worker_id(worker_id), _event(), _allow_multiple_record(allow_multiple_record) {
611 if (_phase_times != nullptr) {
612 _start_time = Ticks::now();
613 }
614 }
615
616 G1GCParPhaseTimesTracker::~G1GCParPhaseTimesTracker() {
617 if (_phase_times != nullptr) {
618 if (_allow_multiple_record) {
619 _phase_times->record_or_add_time_secs(_phase, _worker_id, (Ticks::now() - _start_time).seconds());
620 } else {
621 _phase_times->record_time_secs(_phase, _worker_id, (Ticks::now() - _start_time).seconds());
622 }
623 _event.commit(GCId::current(), _worker_id, G1GCPhaseTimes::phase_name(_phase));
624 }
625 }
626
627 G1EvacPhaseTimesTracker::G1EvacPhaseTimesTracker(G1GCPhaseTimes* phase_times,
628 G1ParScanThreadState* pss,
629 G1GCPhaseTimes::GCParPhases phase,
630 uint worker_id) :
631 G1GCParPhaseTimesTracker(phase_times, phase, worker_id),
632 _total_time(),
633 _trim_time(),
634 _trim_tracker(pss, _total_time, _trim_time) {
635 }
636
637 G1EvacPhaseTimesTracker::~G1EvacPhaseTimesTracker() {
638 if (_phase_times != nullptr) {
639 // Explicitly stop the trim tracker since it's not yet destructed.
640 _trim_tracker.stop();
641 // Exclude trim time by increasing the start time.
642 _start_time += _trim_time;
643 _phase_times->record_or_add_time_secs(G1GCPhaseTimes::ObjCopy, _worker_id, _trim_time.seconds());
644 }
645 }