1 /*
2 * Copyright (c) 2013, 2019, 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/g1GCPhaseTimes.hpp"
28 #include "gc/g1/g1HotCardCache.hpp"
29 #include "gc/g1/g1ParScanThreadState.inline.hpp"
30 #include "gc/g1/g1StringDedup.hpp"
31 #include "gc/shared/gcTimer.hpp"
32 #include "gc/shared/workerDataArray.inline.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "logging/log.hpp"
35 #include "logging/logStream.hpp"
36 #include "runtime/timer.hpp"
37 #include "runtime/os.hpp"
38 #include "utilities/macros.hpp"
39
40 static const char* Indents[5] = {"", " ", " ", " ", " "};
41
42 G1GCPhaseTimes::G1GCPhaseTimes(STWGCTimer* gc_timer, uint max_gc_threads) :
43 _max_gc_threads(max_gc_threads),
44 _gc_start_counter(0),
45 _gc_pause_time_ms(0.0),
46 _ref_phase_times(gc_timer, max_gc_threads),
47 _weak_phase_times(max_gc_threads)
48 {
49 assert(max_gc_threads > 0, "Must have some GC threads");
50
51 _gc_par_phases[GCWorkerStart] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Start (ms):");
52 _gc_par_phases[ExtRootScan] = new WorkerDataArray<double>(max_gc_threads, "Ext Root Scanning (ms):");
53
54 // Root scanning phases
55 _gc_par_phases[ThreadRoots] = new WorkerDataArray<double>(max_gc_threads, "Thread Roots (ms):");
56 _gc_par_phases[UniverseRoots] = new WorkerDataArray<double>(max_gc_threads, "Universe Roots (ms):");
57 _gc_par_phases[JNIRoots] = new WorkerDataArray<double>(max_gc_threads, "JNI Handles Roots (ms):");
58 _gc_par_phases[ObjectSynchronizerRoots] = new WorkerDataArray<double>(max_gc_threads, "ObjectSynchronizer Roots (ms):");
59 _gc_par_phases[ManagementRoots] = new WorkerDataArray<double>(max_gc_threads, "Management Roots (ms):");
60 _gc_par_phases[SystemDictionaryRoots] = new WorkerDataArray<double>(max_gc_threads, "SystemDictionary Roots (ms):");
61 _gc_par_phases[CLDGRoots] = new WorkerDataArray<double>(max_gc_threads, "CLDG Roots (ms):");
62 _gc_par_phases[JVMTIRoots] = new WorkerDataArray<double>(max_gc_threads, "JVMTI Roots (ms):");
63 AOT_ONLY(_gc_par_phases[AOTCodeRoots] = new WorkerDataArray<double>(max_gc_threads, "AOT Root Scan (ms):");)
64 _gc_par_phases[CMRefRoots] = new WorkerDataArray<double>(max_gc_threads, "CM RefProcessor Roots (ms):");
65
66 _gc_par_phases[MergeER] = new WorkerDataArray<double>(max_gc_threads, "Eager Reclaim (ms):");
67
68 _gc_par_phases[MergeRS] = new WorkerDataArray<double>(max_gc_threads, "Remembered Sets (ms):");
69 _merge_rs_merged_sparse = new WorkerDataArray<size_t>(max_gc_threads, "Merged Sparse:");
70 _gc_par_phases[MergeRS]->link_thread_work_items(_merge_rs_merged_sparse, MergeRSMergedSparse);
71 _merge_rs_merged_fine = new WorkerDataArray<size_t>(max_gc_threads, "Merged Fine:");
72 _gc_par_phases[MergeRS]->link_thread_work_items(_merge_rs_merged_fine, MergeRSMergedFine);
73 _merge_rs_merged_coarse = new WorkerDataArray<size_t>(max_gc_threads, "Merged Coarse:");
74 _gc_par_phases[MergeRS]->link_thread_work_items(_merge_rs_merged_coarse, MergeRSMergedCoarse);
75 _merge_rs_dirty_cards = new WorkerDataArray<size_t>(max_gc_threads, "Dirty Cards:");
76 _gc_par_phases[MergeRS]->link_thread_work_items(_merge_rs_dirty_cards, MergeRSDirtyCards);
77
78 _gc_par_phases[OptMergeRS] = new WorkerDataArray<double>(max_gc_threads, "Optional Remembered Sets (ms):");
79 _opt_merge_rs_merged_sparse = new WorkerDataArray<size_t>(max_gc_threads, "Merged Sparse:");
80 _gc_par_phases[OptMergeRS]->link_thread_work_items(_opt_merge_rs_merged_sparse, MergeRSMergedSparse);
81 _opt_merge_rs_merged_fine = new WorkerDataArray<size_t>(max_gc_threads, "Merged Fine:");
82 _gc_par_phases[OptMergeRS]->link_thread_work_items(_opt_merge_rs_merged_fine, MergeRSMergedFine);
83 _opt_merge_rs_merged_coarse = new WorkerDataArray<size_t>(max_gc_threads, "Merged Coarse:");
84 _gc_par_phases[OptMergeRS]->link_thread_work_items(_opt_merge_rs_merged_coarse, MergeRSMergedCoarse);
85 _opt_merge_rs_dirty_cards = new WorkerDataArray<size_t>(max_gc_threads, "Dirty Cards:");
86 _gc_par_phases[OptMergeRS]->link_thread_work_items(_opt_merge_rs_dirty_cards, MergeRSDirtyCards);
87
88 _gc_par_phases[MergeLB] = new WorkerDataArray<double>(max_gc_threads, "Log Buffers (ms):");
89 if (G1HotCardCache::default_use_cache()) {
90 _gc_par_phases[MergeHCC] = new WorkerDataArray<double>(max_gc_threads, "Hot Card Cache (ms):");
91 _merge_hcc_dirty_cards = new WorkerDataArray<size_t>(max_gc_threads, "Dirty Cards:");
92 _gc_par_phases[MergeHCC]->link_thread_work_items(_merge_hcc_dirty_cards, MergeHCCDirtyCards);
93 _merge_hcc_skipped_cards = new WorkerDataArray<size_t>(max_gc_threads, "Skipped Cards:");
94 _gc_par_phases[MergeHCC]->link_thread_work_items(_merge_hcc_skipped_cards, MergeHCCSkippedCards);
95 } else {
96 _gc_par_phases[MergeHCC] = NULL;
97 _merge_hcc_dirty_cards = NULL;
98 _merge_hcc_skipped_cards = NULL;
99 }
100 _gc_par_phases[ScanHR] = new WorkerDataArray<double>(max_gc_threads, "Scan Heap Roots (ms):");
101 _gc_par_phases[OptScanHR] = new WorkerDataArray<double>(max_gc_threads, "Optional Scan Heap Roots (ms):");
102 _gc_par_phases[CodeRoots] = new WorkerDataArray<double>(max_gc_threads, "Code Root Scan (ms):");
103 _gc_par_phases[OptCodeRoots] = new WorkerDataArray<double>(max_gc_threads, "Optional Code Root Scan (ms):");
104 _gc_par_phases[ObjCopy] = new WorkerDataArray<double>(max_gc_threads, "Object Copy (ms):");
105 _gc_par_phases[OptObjCopy] = new WorkerDataArray<double>(max_gc_threads, "Optional Object Copy (ms):");
106 _gc_par_phases[Termination] = new WorkerDataArray<double>(max_gc_threads, "Termination (ms):");
107 _gc_par_phases[OptTermination] = new WorkerDataArray<double>(max_gc_threads, "Optional Termination (ms):");
108 _gc_par_phases[GCWorkerTotal] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Total (ms):");
109 _gc_par_phases[GCWorkerEnd] = new WorkerDataArray<double>(max_gc_threads, "GC Worker End (ms):");
110 _gc_par_phases[Other] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Other (ms):");
111
112 _scan_hr_scanned_cards = new WorkerDataArray<size_t>(max_gc_threads, "Scanned Cards:");
113 _gc_par_phases[ScanHR]->link_thread_work_items(_scan_hr_scanned_cards, ScanHRScannedCards);
114 _scan_hr_scanned_blocks = new WorkerDataArray<size_t>(max_gc_threads, "Scanned Blocks:");
115 _gc_par_phases[ScanHR]->link_thread_work_items(_scan_hr_scanned_blocks, ScanHRScannedBlocks);
116 _scan_hr_claimed_chunks = new WorkerDataArray<size_t>(max_gc_threads, "Claimed Chunks:");
117 _gc_par_phases[ScanHR]->link_thread_work_items(_scan_hr_claimed_chunks, ScanHRClaimedChunks);
118
119 _opt_scan_hr_scanned_cards = new WorkerDataArray<size_t>(max_gc_threads, "Scanned Cards:");
120 _gc_par_phases[OptScanHR]->link_thread_work_items(_opt_scan_hr_scanned_cards, ScanHRScannedCards);
121 _opt_scan_hr_scanned_blocks = new WorkerDataArray<size_t>(max_gc_threads, "Scanned Blocks:");
122 _gc_par_phases[OptScanHR]->link_thread_work_items(_opt_scan_hr_scanned_blocks, ScanHRScannedBlocks);
123 _opt_scan_hr_claimed_chunks = new WorkerDataArray<size_t>(max_gc_threads, "Claimed Chunks:");
124 _gc_par_phases[OptScanHR]->link_thread_work_items(_opt_scan_hr_claimed_chunks, ScanHRClaimedChunks);
125 _opt_scan_hr_scanned_opt_refs = new WorkerDataArray<size_t>(max_gc_threads, "Scanned Refs:");
126 _gc_par_phases[OptScanHR]->link_thread_work_items(_opt_scan_hr_scanned_opt_refs, ScanHRScannedOptRefs);
127 _opt_scan_hr_used_memory = new WorkerDataArray<size_t>(max_gc_threads, "Used Memory:");
128 _gc_par_phases[OptScanHR]->link_thread_work_items(_opt_scan_hr_used_memory, ScanHRUsedMemory);
129
130 _merge_lb_dirty_cards = new WorkerDataArray<size_t>(max_gc_threads, "Dirty Cards:");
131 _gc_par_phases[MergeLB]->link_thread_work_items(_merge_lb_dirty_cards, MergeLBDirtyCards);
132 _merge_lb_skipped_cards = new WorkerDataArray<size_t>(max_gc_threads, "Skipped Cards:");
133 _gc_par_phases[MergeLB]->link_thread_work_items(_merge_lb_skipped_cards, MergeLBSkippedCards);
134
135 _gc_par_phases[MergePSS] = new WorkerDataArray<double>(1, "Merge Per-Thread State", true /* is_serial */);
136
137 _merge_pss_copied_bytes = new WorkerDataArray<size_t>(max_gc_threads, "Copied Bytes");
138 _gc_par_phases[MergePSS]->link_thread_work_items(_merge_pss_copied_bytes, MergePSSCopiedBytes);
139 _merge_pss_lab_waste_bytes = new WorkerDataArray<size_t>(max_gc_threads, "LAB Waste");
140 _gc_par_phases[MergePSS]->link_thread_work_items(_merge_pss_lab_waste_bytes, MergePSSLABWasteBytes);
141 _merge_pss_lab_undo_waste_bytes = new WorkerDataArray<size_t>(max_gc_threads, "LAB Undo Waste");
142 _gc_par_phases[MergePSS]->link_thread_work_items(_merge_pss_lab_undo_waste_bytes, MergePSSLABUndoWasteBytes);
143
144 _termination_attempts = new WorkerDataArray<size_t>(max_gc_threads, "Termination Attempts:");
145 _gc_par_phases[Termination]->link_thread_work_items(_termination_attempts);
146
147 _opt_termination_attempts = new WorkerDataArray<size_t>(max_gc_threads, "Optional Termination Attempts:");
148 _gc_par_phases[OptTermination]->link_thread_work_items(_opt_termination_attempts);
149
150 if (UseStringDeduplication) {
151 _gc_par_phases[StringDedupQueueFixup] = new WorkerDataArray<double>(max_gc_threads, "Queue Fixup (ms):");
152 _gc_par_phases[StringDedupTableFixup] = new WorkerDataArray<double>(max_gc_threads, "Table Fixup (ms):");
153 } else {
154 _gc_par_phases[StringDedupQueueFixup] = NULL;
155 _gc_par_phases[StringDedupTableFixup] = NULL;
156 }
157
158 _gc_par_phases[RedirtyCards] = new WorkerDataArray<double>(max_gc_threads, "Parallel Redirty (ms):");
159 _redirtied_cards = new WorkerDataArray<size_t>(max_gc_threads, "Redirtied Cards:");
160 _gc_par_phases[RedirtyCards]->link_thread_work_items(_redirtied_cards);
161
162 _gc_par_phases[YoungFreeCSet] = new WorkerDataArray<double>(max_gc_threads, "Young Free Collection Set (ms):");
163 _gc_par_phases[NonYoungFreeCSet] = new WorkerDataArray<double>(max_gc_threads, "Non-Young Free Collection Set (ms):");
164
165 reset();
166 }
167
168 void G1GCPhaseTimes::reset() {
169 _cur_collection_initial_evac_time_ms = 0.0;
170 _cur_optional_evac_time_ms = 0.0;
171 _cur_collection_code_root_fixup_time_ms = 0.0;
172 _cur_strong_code_root_purge_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_optional_prepare_merge_heap_roots_time_ms = 0.0;
177 _cur_evac_fail_recalc_used = 0.0;
178 _cur_evac_fail_remove_self_forwards = 0.0;
179 _cur_string_deduplication_time_ms = 0.0;
180 _cur_prepare_tlab_time_ms = 0.0;
181 _cur_resize_tlab_time_ms = 0.0;
182 _cur_derived_pointer_table_update_time_ms = 0.0;
183 _cur_clear_ct_time_ms = 0.0;
184 _cur_expand_heap_time_ms = 0.0;
185 _cur_ref_proc_time_ms = 0.0;
186 _cur_collection_start_sec = 0.0;
187 _root_region_scan_wait_time_ms = 0.0;
188 _external_accounted_time_ms = 0.0;
189 _recorded_prepare_heap_roots_time_ms = 0.0;
190 _recorded_clear_claimed_marks_time_ms = 0.0;
191 _recorded_young_cset_choice_time_ms = 0.0;
192 _recorded_non_young_cset_choice_time_ms = 0.0;
193 _recorded_redirty_logged_cards_time_ms = 0.0;
194 _recorded_preserve_cm_referents_time_ms = 0.0;
195 _recorded_start_new_cset_time_ms = 0.0;
196 _recorded_total_free_cset_time_ms = 0.0;
197 _recorded_serial_free_cset_time_ms = 0.0;
198 _cur_fast_reclaim_humongous_time_ms = 0.0;
199 _cur_region_register_time = 0.0;
200 _cur_fast_reclaim_humongous_total = 0;
201 _cur_fast_reclaim_humongous_candidates = 0;
202 _cur_fast_reclaim_humongous_reclaimed = 0;
203 _cur_verify_before_time_ms = 0.0;
204 _cur_verify_after_time_ms = 0.0;
205
206 for (int i = 0; i < GCParPhasesSentinel; i++) {
207 if (_gc_par_phases[i] != NULL) {
208 _gc_par_phases[i]->reset();
209 }
210 }
211
212 _ref_phase_times.reset();
213 _weak_phase_times.reset();
214 }
215
216 void G1GCPhaseTimes::note_gc_start() {
217 _gc_start_counter = os::elapsed_counter();
218 reset();
219 }
220
221 #define ASSERT_PHASE_UNINITIALIZED(phase) \
222 assert(_gc_par_phases[phase] == NULL || _gc_par_phases[phase]->get(i) == uninitialized, "Phase " #phase " reported for thread that was not started");
223
224 double G1GCPhaseTimes::worker_time(GCParPhases phase, uint worker) {
225 if (_gc_par_phases[phase] == NULL) {
226 return 0.0;
227 }
228 double value = _gc_par_phases[phase]->get(worker);
229 if (value != WorkerDataArray<double>::uninitialized()) {
230 return value;
231 }
232 return 0.0;
233 }
234
235 void G1GCPhaseTimes::note_gc_end() {
236 _gc_pause_time_ms = TimeHelper::counter_to_millis(os::elapsed_counter() - _gc_start_counter);
237
238 double uninitialized = WorkerDataArray<double>::uninitialized();
239
240 for (uint i = 0; i < _max_gc_threads; i++) {
241 double worker_start = _gc_par_phases[GCWorkerStart]->get(i);
242 if (worker_start != uninitialized) {
243 assert(_gc_par_phases[GCWorkerEnd]->get(i) != uninitialized, "Worker started but not ended.");
244 double total_worker_time = _gc_par_phases[GCWorkerEnd]->get(i) - _gc_par_phases[GCWorkerStart]->get(i);
245 record_time_secs(GCWorkerTotal, i , total_worker_time);
246
247 double worker_known_time = worker_time(ExtRootScan, i) +
248 worker_time(ScanHR, i) +
249 worker_time(CodeRoots, i) +
250 worker_time(ObjCopy, i) +
251 worker_time(Termination, i);
252
253 record_time_secs(Other, i, total_worker_time - worker_known_time);
254 } else {
255 // Make sure all slots are uninitialized since this thread did not seem to have been started
256 ASSERT_PHASE_UNINITIALIZED(GCWorkerEnd);
257 ASSERT_PHASE_UNINITIALIZED(ExtRootScan);
258 ASSERT_PHASE_UNINITIALIZED(MergeER);
259 ASSERT_PHASE_UNINITIALIZED(MergeRS);
260 ASSERT_PHASE_UNINITIALIZED(OptMergeRS);
261 ASSERT_PHASE_UNINITIALIZED(MergeHCC);
262 ASSERT_PHASE_UNINITIALIZED(MergeLB);
263 ASSERT_PHASE_UNINITIALIZED(ScanHR);
264 ASSERT_PHASE_UNINITIALIZED(CodeRoots);
265 ASSERT_PHASE_UNINITIALIZED(OptCodeRoots);
266 ASSERT_PHASE_UNINITIALIZED(ObjCopy);
267 ASSERT_PHASE_UNINITIALIZED(OptObjCopy);
268 ASSERT_PHASE_UNINITIALIZED(Termination);
269 }
270 }
271 }
272
273 #undef ASSERT_PHASE_UNINITIALIZED
274
275 // record the time a phase took in seconds
276 void G1GCPhaseTimes::record_time_secs(GCParPhases phase, uint worker_id, double secs) {
277 _gc_par_phases[phase]->set(worker_id, secs);
278 }
279
280 // add a number of seconds to a phase
281 void G1GCPhaseTimes::add_time_secs(GCParPhases phase, uint worker_id, double secs) {
282 _gc_par_phases[phase]->add(worker_id, secs);
283 }
284
285 void G1GCPhaseTimes::record_or_add_time_secs(GCParPhases phase, uint worker_id, double secs) {
286 if (_gc_par_phases[phase]->get(worker_id) == _gc_par_phases[phase]->uninitialized()) {
287 record_time_secs(phase, worker_id, secs);
288 } else {
289 add_time_secs(phase, worker_id, secs);
290 }
291 }
292
293 double G1GCPhaseTimes::get_time_secs(GCParPhases phase, uint worker_id) {
294 return _gc_par_phases[phase]->get(worker_id);
295 }
296
297 void G1GCPhaseTimes::record_thread_work_item(GCParPhases phase, uint worker_id, size_t count, uint index) {
298 _gc_par_phases[phase]->set_thread_work_item(worker_id, count, index);
299 }
300
301 void G1GCPhaseTimes::record_or_add_thread_work_item(GCParPhases phase, uint worker_id, size_t count, uint index) {
302 _gc_par_phases[phase]->set_or_add_thread_work_item(worker_id, count, index);
303 }
304
305 size_t G1GCPhaseTimes::get_thread_work_item(GCParPhases phase, uint worker_id, uint index) {
306 return _gc_par_phases[phase]->get_thread_work_item(worker_id, index);
307 }
308
309 // return the average time for a phase in milliseconds
310 double G1GCPhaseTimes::average_time_ms(GCParPhases phase) {
311 if (_gc_par_phases[phase] == NULL) {
312 return 0.0;
313 }
314 return _gc_par_phases[phase]->average() * 1000.0;
315 }
316
317 size_t G1GCPhaseTimes::sum_thread_work_items(GCParPhases phase, uint index) {
318 if (_gc_par_phases[phase] == NULL) {
319 return 0;
320 }
321 assert(_gc_par_phases[phase]->thread_work_items(index) != NULL, "No sub count");
322 return _gc_par_phases[phase]->thread_work_items(index)->sum();
323 }
324
325 template <class T>
326 void G1GCPhaseTimes::details(T* phase, const char* indent) const {
327 LogTarget(Trace, gc, phases, task) lt;
328 if (lt.is_enabled()) {
329 LogStream ls(lt);
330 ls.print("%s", indent);
331 phase->print_details_on(&ls);
332 }
333 }
334
335 void G1GCPhaseTimes::log_phase(WorkerDataArray<double>* phase, uint indent, outputStream* out, bool print_sum) const {
336 out->print("%s", Indents[indent]);
337 phase->print_summary_on(out, print_sum);
338 details(phase, Indents[indent]);
339
340 for (uint i = 0; i < phase->MaxThreadWorkItems; i++) {
341 WorkerDataArray<size_t>* work_items = phase->thread_work_items(i);
342 if (work_items != NULL) {
343 out->print("%s", Indents[indent + 1]);
344 work_items->print_summary_on(out, true);
345 details(work_items, Indents[indent + 1]);
346 }
347 }
348 }
349
350 void G1GCPhaseTimes::debug_phase(WorkerDataArray<double>* phase, uint extra_indent) const {
351 LogTarget(Debug, gc, phases) lt;
352 if (lt.is_enabled()) {
353 ResourceMark rm;
354 LogStream ls(lt);
355 log_phase(phase, 2 + extra_indent, &ls, true);
356 }
357 }
358
359 void G1GCPhaseTimes::trace_phase(WorkerDataArray<double>* phase, bool print_sum) const {
360 LogTarget(Trace, gc, phases) lt;
361 if (lt.is_enabled()) {
362 LogStream ls(lt);
363 log_phase(phase, 3, &ls, print_sum);
364 }
365 }
366
367 #define TIME_FORMAT "%.1lfms"
368
369 void G1GCPhaseTimes::info_time(const char* name, double value) const {
370 log_info(gc, phases)("%s%s: " TIME_FORMAT, Indents[1], name, value);
371 }
372
373 void G1GCPhaseTimes::debug_time(const char* name, double value) const {
374 log_debug(gc, phases)("%s%s: " TIME_FORMAT, Indents[2], name, value);
375 }
376
377 void G1GCPhaseTimes::debug_time_for_reference(const char* name, double value) const {
378 LogTarget(Debug, gc, phases) lt;
379 LogTarget(Debug, gc, phases, ref) lt2;
380
381 if (lt.is_enabled()) {
382 LogStream ls(lt);
383 ls.print_cr("%s%s: " TIME_FORMAT, Indents[2], name, value);
384 } else if (lt2.is_enabled()) {
385 LogStream ls(lt2);
386 ls.print_cr("%s%s: " TIME_FORMAT, Indents[2], name, value);
387 }
388 }
389
390 void G1GCPhaseTimes::trace_time(const char* name, double value) const {
391 log_trace(gc, phases)("%s%s: " TIME_FORMAT, Indents[3], name, value);
392 }
393
394 void G1GCPhaseTimes::trace_count(const char* name, size_t value) const {
395 log_trace(gc, phases)("%s%s: " SIZE_FORMAT, Indents[3], name, value);
396 }
397
398 double G1GCPhaseTimes::print_pre_evacuate_collection_set() const {
399 const double sum_ms = _root_region_scan_wait_time_ms +
400 _recorded_young_cset_choice_time_ms +
401 _recorded_non_young_cset_choice_time_ms +
402 _cur_region_register_time +
403 _recorded_prepare_heap_roots_time_ms +
404 _recorded_clear_claimed_marks_time_ms;
405
406 info_time("Pre Evacuate Collection Set", sum_ms);
407
408 if (_root_region_scan_wait_time_ms > 0.0) {
409 debug_time("Root Region Scan Waiting", _root_region_scan_wait_time_ms);
410 }
411 debug_time("Prepare TLABs", _cur_prepare_tlab_time_ms);
412 debug_time("Choose Collection Set", (_recorded_young_cset_choice_time_ms + _recorded_non_young_cset_choice_time_ms));
413 debug_time("Region Register", _cur_region_register_time);
414 if (G1EagerReclaimHumongousObjects) {
415 trace_count("Humongous Total", _cur_fast_reclaim_humongous_total);
416 trace_count("Humongous Candidate", _cur_fast_reclaim_humongous_candidates);
417 }
418
419 debug_time("Prepare Heap Roots", _recorded_prepare_heap_roots_time_ms);
420 if (_recorded_clear_claimed_marks_time_ms > 0.0) {
421 debug_time("Clear Claimed Marks", _recorded_clear_claimed_marks_time_ms);
422 }
423 return sum_ms;
424 }
425
426 double G1GCPhaseTimes::print_evacuate_optional_collection_set() const {
427 const double sum_ms = _cur_optional_evac_time_ms + _cur_optional_merge_heap_roots_time_ms;
428 if (sum_ms > 0) {
429 info_time("Merge Optional Heap Roots", _cur_optional_merge_heap_roots_time_ms);
430
431 debug_time("Prepare Optional Merge Heap Roots", _cur_optional_prepare_merge_heap_roots_time_ms);
432 debug_phase(_gc_par_phases[OptMergeRS]);
433
434 info_time("Evacuate Optional Collection Set", _cur_optional_evac_time_ms);
435 debug_phase(_gc_par_phases[OptScanHR]);
436 debug_phase(_gc_par_phases[OptObjCopy]);
437 debug_phase(_gc_par_phases[OptCodeRoots]);
438 debug_phase(_gc_par_phases[OptTermination]);
439 }
440 return sum_ms;
441 }
442
443 double G1GCPhaseTimes::print_evacuate_initial_collection_set() const {
444 info_time("Merge Heap Roots", _cur_merge_heap_roots_time_ms);
445
446 debug_time("Prepare Merge Heap Roots", _cur_prepare_merge_heap_roots_time_ms);
447 debug_phase(_gc_par_phases[MergeER]);
448 debug_phase(_gc_par_phases[MergeRS]);
449 if (G1HotCardCache::default_use_cache()) {
450 debug_phase(_gc_par_phases[MergeHCC]);
451 }
452 debug_phase(_gc_par_phases[MergeLB]);
453
454 info_time("Evacuate Collection Set", _cur_collection_initial_evac_time_ms);
455
456 trace_phase(_gc_par_phases[GCWorkerStart], false);
457 debug_phase(_gc_par_phases[ExtRootScan]);
458 for (int i = ExtRootScanSubPhasesFirst; i <= ExtRootScanSubPhasesLast; i++) {
459 trace_phase(_gc_par_phases[i]);
460 }
461 debug_phase(_gc_par_phases[ScanHR]);
462 debug_phase(_gc_par_phases[CodeRoots]);
463 debug_phase(_gc_par_phases[ObjCopy]);
464 debug_phase(_gc_par_phases[Termination]);
465 debug_phase(_gc_par_phases[Other]);
466 debug_phase(_gc_par_phases[GCWorkerTotal]);
467 trace_phase(_gc_par_phases[GCWorkerEnd], false);
468
469 return _cur_collection_initial_evac_time_ms + _cur_merge_heap_roots_time_ms;
470 }
471
472 double G1GCPhaseTimes::print_post_evacuate_collection_set() const {
473 const double evac_fail_handling = _cur_evac_fail_recalc_used +
474 _cur_evac_fail_remove_self_forwards;
475 assert(_gc_par_phases[MergePSS]->get(0) != WorkerDataArray<double>::uninitialized(), "must be set");
476 const double merge_pss = _gc_par_phases[MergePSS]->get(0) * MILLIUNITS;
477 const double sum_ms = evac_fail_handling +
478 _cur_collection_code_root_fixup_time_ms +
479 _recorded_preserve_cm_referents_time_ms +
480 _cur_ref_proc_time_ms +
481 (_weak_phase_times.total_time_sec() * MILLIUNITS) +
482 _cur_clear_ct_time_ms +
483 merge_pss +
484 _cur_strong_code_root_purge_time_ms +
485 _recorded_redirty_logged_cards_time_ms +
486 _recorded_total_free_cset_time_ms +
487 _cur_fast_reclaim_humongous_time_ms +
488 _cur_expand_heap_time_ms +
489 _cur_string_deduplication_time_ms;
490
491 info_time("Post Evacuate Collection Set", sum_ms);
492
493 debug_time("Code Roots Fixup", _cur_collection_code_root_fixup_time_ms);
494
495 debug_time("Clear Card Table", _cur_clear_ct_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_print(2);
500
501 if (G1StringDedup::is_enabled()) {
502 debug_time("String Deduplication", _cur_string_deduplication_time_ms);
503 debug_phase(_gc_par_phases[StringDedupQueueFixup], 1);
504 debug_phase(_gc_par_phases[StringDedupTableFixup], 1);
505 }
506
507 if (G1CollectedHeap::heap()->evacuation_failed()) {
508 debug_time("Evacuation Failure", evac_fail_handling);
509 trace_time("Recalculate Used", _cur_evac_fail_recalc_used);
510 trace_time("Remove Self Forwards",_cur_evac_fail_remove_self_forwards);
511 }
512
513 debug_phase(_gc_par_phases[MergePSS], 0);
514 debug_time("Code Roots Purge", _cur_strong_code_root_purge_time_ms);
515
516 debug_time("Redirty Cards", _recorded_redirty_logged_cards_time_ms);
517 trace_phase(_gc_par_phases[RedirtyCards]);
518 #if COMPILER2_OR_JVMCI
519 debug_time("DerivedPointerTable Update", _cur_derived_pointer_table_update_time_ms);
520 #endif
521
522 debug_time("Free Collection Set", _recorded_total_free_cset_time_ms);
523 trace_time("Free Collection Set Serial", _recorded_serial_free_cset_time_ms);
524 trace_phase(_gc_par_phases[YoungFreeCSet]);
525 trace_phase(_gc_par_phases[NonYoungFreeCSet]);
526
527 if (G1EagerReclaimHumongousObjects) {
528 debug_time("Humongous Reclaim", _cur_fast_reclaim_humongous_time_ms);
529 trace_count("Humongous Reclaimed", _cur_fast_reclaim_humongous_reclaimed);
530 }
531 debug_time("Start New Collection Set", _recorded_start_new_cset_time_ms);
532 if (UseTLAB && ResizeTLAB) {
533 debug_time("Resize TLABs", _cur_resize_tlab_time_ms);
534 }
535 debug_time("Expand Heap After Collection", _cur_expand_heap_time_ms);
536
537
538 return sum_ms;
539 }
540
541 void G1GCPhaseTimes::print_other(double accounted_ms) const {
542 info_time("Other", _gc_pause_time_ms - accounted_ms);
543 }
544
545 void G1GCPhaseTimes::print() {
546 note_gc_end();
547
548 if (_cur_verify_before_time_ms > 0.0) {
549 debug_time("Verify Before", _cur_verify_before_time_ms);
550 }
551
552 double accounted_ms = 0.0;
553 accounted_ms += print_pre_evacuate_collection_set();
554 accounted_ms += print_evacuate_initial_collection_set();
555 accounted_ms += print_evacuate_optional_collection_set();
556 accounted_ms += print_post_evacuate_collection_set();
557 print_other(accounted_ms);
558
559 if (_cur_verify_after_time_ms > 0.0) {
560 debug_time("Verify After", _cur_verify_after_time_ms);
561 }
562 }
563
564 const char* G1GCPhaseTimes::phase_name(GCParPhases phase) {
565 static const char* names[] = {
566 "GCWorkerStart",
567 "ExtRootScan",
568 "ThreadRoots",
569 "UniverseRoots",
570 "JNIRoots",
571 "ObjectSynchronizerRoots",
572 "ManagementRoots",
573 "SystemDictionaryRoots",
574 "CLDGRoots",
575 "JVMTIRoots",
576 AOT_ONLY("AOTCodeRoots" COMMA)
577 "CMRefRoots",
578 "MergeER",
579 "MergeRS",
580 "OptMergeRS",
581 "MergeLB",
582 "MergeHCC",
583 "ScanHR",
584 "OptScanHR",
585 "CodeRoots",
586 "OptCodeRoots",
587 "ObjCopy",
588 "OptObjCopy",
589 "Termination",
590 "OptTermination",
591 "Other",
592 "GCWorkerTotal",
593 "GCWorkerEnd",
594 "StringDedupQueueFixup",
595 "StringDedupTableFixup",
596 "RedirtyCards",
597 "YoungFreeCSet",
598 "NonYoungFreeCSet",
599 "MergePSS"
600 //GCParPhasesSentinel only used to tell end of enum
601 };
602
603 STATIC_ASSERT(ARRAY_SIZE(names) == G1GCPhaseTimes::GCParPhasesSentinel); // GCParPhases enum and corresponding string array should have the same "length", this tries to assert it
604
605 return names[phase];
606 }
607
608 G1EvacPhaseWithTrimTimeTracker::G1EvacPhaseWithTrimTimeTracker(G1ParScanThreadState* pss, Tickspan& total_time, Tickspan& trim_time) :
609 _pss(pss),
610 _start(Ticks::now()),
611 _total_time(total_time),
612 _trim_time(trim_time),
613 _stopped(false) {
614
615 assert(_pss->trim_ticks().value() == 0, "Possibly remaining trim ticks left over from previous use");
616 }
617
618 G1EvacPhaseWithTrimTimeTracker::~G1EvacPhaseWithTrimTimeTracker() {
619 if (!_stopped) {
620 stop();
621 }
622 }
623
624 void G1EvacPhaseWithTrimTimeTracker::stop() {
625 assert(!_stopped, "Should only be called once");
626 _total_time += (Ticks::now() - _start) - _pss->trim_ticks();
627 _trim_time += _pss->trim_ticks();
628 _pss->reset_trim_ticks();
629 _stopped = true;
630 }
631
632 G1GCParPhaseTimesTracker::G1GCParPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1GCPhaseTimes::GCParPhases phase, uint worker_id, bool must_record) :
633 _start_time(), _phase(phase), _phase_times(phase_times), _worker_id(worker_id), _event(), _must_record(must_record) {
634 if (_phase_times != NULL) {
635 _start_time = Ticks::now();
636 }
637 }
638
639 G1GCParPhaseTimesTracker::~G1GCParPhaseTimesTracker() {
640 if (_phase_times != NULL) {
641 if (_must_record) {
642 _phase_times->record_time_secs(_phase, _worker_id, (Ticks::now() - _start_time).seconds());
643 } else {
644 _phase_times->record_or_add_time_secs(_phase, _worker_id, (Ticks::now() - _start_time).seconds());
645 }
646 _event.commit(GCId::current(), _worker_id, G1GCPhaseTimes::phase_name(_phase));
647 }
648 }
649
650 G1EvacPhaseTimesTracker::G1EvacPhaseTimesTracker(G1GCPhaseTimes* phase_times,
651 G1ParScanThreadState* pss,
652 G1GCPhaseTimes::GCParPhases phase,
653 uint worker_id) :
654 G1GCParPhaseTimesTracker(phase_times, phase, worker_id),
655 _total_time(),
656 _trim_time(),
657 _trim_tracker(pss, _total_time, _trim_time) {
658 }
659
660 G1EvacPhaseTimesTracker::~G1EvacPhaseTimesTracker() {
661 if (_phase_times != NULL) {
662 // Explicitly stop the trim tracker since it's not yet destructed.
663 _trim_tracker.stop();
664 // Exclude trim time by increasing the start time.
665 _start_time += _trim_time;
666 _phase_times->record_or_add_time_secs(G1GCPhaseTimes::ObjCopy, _worker_id, _trim_time.seconds());
667 }
668 }
669