62 }
63 #endif
64
65 void append(const char* format, ...) {
66 va_list ap;
67 va_start(ap, format);
68 vappend(format, ap);
69 va_end(ap);
70 }
71
72 void append_and_print_cr(const char* format, ...) {
73 va_list ap;
74 va_start(ap, format);
75 vappend(format, ap);
76 va_end(ap);
77 gclog_or_tty->print_cr("%s", _buffer);
78 _cur = _indent_level * INDENT_CHARS;
79 }
80 };
81
82 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
83 _max_gc_threads(max_gc_threads),
84 _min_clear_cc_time_ms(-1.0),
85 _max_clear_cc_time_ms(-1.0),
86 _cur_clear_cc_time_ms(0.0),
87 _cum_clear_cc_time_ms(0.0),
88 _num_cc_clears(0L)
89 {
90 assert(max_gc_threads > 0, "Must have some GC threads");
91 _par_last_gc_worker_start_times_ms = new double[_max_gc_threads];
92 _par_last_ext_root_scan_times_ms = new double[_max_gc_threads];
93 _par_last_satb_filtering_times_ms = new double[_max_gc_threads];
94 _par_last_update_rs_times_ms = new double[_max_gc_threads];
95 _par_last_update_rs_processed_buffers = new double[_max_gc_threads];
96 _par_last_scan_rs_times_ms = new double[_max_gc_threads];
97 _par_last_obj_copy_times_ms = new double[_max_gc_threads];
98 _par_last_termination_times_ms = new double[_max_gc_threads];
99 _par_last_termination_attempts = new double[_max_gc_threads];
100 _par_last_gc_worker_end_times_ms = new double[_max_gc_threads];
101 _par_last_gc_worker_times_ms = new double[_max_gc_threads];
102 _par_last_gc_worker_other_times_ms = new double[_max_gc_threads];
103 }
104
105 void G1GCPhaseTimes::note_gc_start(double pause_start_time_sec, uint active_gc_threads,
106 bool is_young_gc, bool is_initial_mark_gc, GCCause::Cause gc_cause) {
107 assert(active_gc_threads > 0, "The number of threads must be > 0");
108 assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads");
109 _active_gc_threads = active_gc_threads;
110 _pause_start_time_sec = pause_start_time_sec;
111 _is_young_gc = is_young_gc;
112 _is_initial_mark_gc = is_initial_mark_gc;
113 _gc_cause = gc_cause;
114
115 #ifdef ASSERT
116 // initialise the timing data to something well known so that we can spot
117 // if something is not set properly
118
119 for (uint i = 0; i < _max_gc_threads; ++i) {
120 _par_last_gc_worker_start_times_ms[i] = -1234.0;
121 _par_last_ext_root_scan_times_ms[i] = -1234.0;
122 _par_last_satb_filtering_times_ms[i] = -1234.0;
123 _par_last_update_rs_times_ms[i] = -1234.0;
124 _par_last_update_rs_processed_buffers[i] = -1234.0;
125 _par_last_scan_rs_times_ms[i] = -1234.0;
126 _par_last_obj_copy_times_ms[i] = -1234.0;
127 _par_last_termination_times_ms[i] = -1234.0;
128 _par_last_termination_attempts[i] = -1234.0;
129 _par_last_gc_worker_end_times_ms[i] = -1234.0;
130 _par_last_gc_worker_times_ms[i] = -1234.0;
131 _par_last_gc_worker_other_times_ms[i] = -1234.0;
132 }
133 #endif
134 }
135
136 void G1GCPhaseTimes::note_gc_end(double pause_end_time_sec) {
137 if (G1Log::fine()) {
138 double pause_time_ms = (pause_end_time_sec - _pause_start_time_sec) * MILLIUNITS;
139
140 for (uint i = 0; i < _active_gc_threads; i++) {
141 _par_last_gc_worker_times_ms[i] = _par_last_gc_worker_end_times_ms[i] -
142 _par_last_gc_worker_start_times_ms[i];
143
144 double worker_known_time = _par_last_ext_root_scan_times_ms[i] +
145 _par_last_satb_filtering_times_ms[i] +
146 _par_last_update_rs_times_ms[i] +
147 _par_last_scan_rs_times_ms[i] +
148 _par_last_obj_copy_times_ms[i] +
149 _par_last_termination_times_ms[i];
150
151 _par_last_gc_worker_other_times_ms[i] = _par_last_gc_worker_times_ms[i] -
152 worker_known_time;
153 }
154
155 print(pause_time_ms);
156 }
157
158 }
159
160 void G1GCPhaseTimes::print_par_stats(int level,
161 const char* str,
162 double* data,
163 bool showDecimals) {
164 double min = data[0], max = data[0];
165 double total = 0.0;
166 LineBuffer buf(level);
167 buf.append("[%s (ms):", str);
168 for (uint i = 0; i < _active_gc_threads; ++i) {
169 double val = data[i];
170 if (val < min)
171 min = val;
172 if (val > max)
173 max = val;
174 total += val;
175 if (G1Log::finest()) {
176 if (showDecimals) {
177 buf.append(" %.1lf", val);
178 } else {
179 buf.append(" %d", (int)val);
180 }
181 }
182 }
183
184 if (G1Log::finest()) {
185 buf.append_and_print_cr("");
186 }
187 double avg = total / (double) _active_gc_threads;
188 if (showDecimals) {
189 buf.append_and_print_cr(" Min: %.1lf, Avg: %.1lf, Max: %.1lf, Diff: %.1lf, Sum: %.1lf]",
190 min, avg, max, max - min, total);
191 } else {
192 buf.append_and_print_cr(" Min: %d, Avg: %d, Max: %d, Diff: %d, Sum: %d]",
193 (int)min, (int)avg, (int)max, (int)max - (int)min, (int)total);
194 }
195 }
196
197 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) {
198 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value);
199 }
200
201 void G1GCPhaseTimes::print_stats(int level, const char* str, double value, int workers) {
202 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %d]", str, value, workers);
203 }
204
205 void G1GCPhaseTimes::print_stats(int level, const char* str, int value) {
206 LineBuffer(level).append_and_print_cr("[%s: %d]", str, value);
207 }
208
209 double G1GCPhaseTimes::avg_value(double* data) {
210 if (G1CollectedHeap::use_parallel_gc_threads()) {
211 double ret = 0.0;
212 for (uint i = 0; i < _active_gc_threads; ++i) {
213 ret += data[i];
214 }
215 return ret / (double) _active_gc_threads;
216 } else {
217 return data[0];
218 }
219 }
220
221 double G1GCPhaseTimes::max_value(double* data) {
222 if (G1CollectedHeap::use_parallel_gc_threads()) {
223 double ret = data[0];
224 for (uint i = 1; i < _active_gc_threads; ++i) {
225 if (data[i] > ret) {
226 ret = data[i];
227 }
228 }
229 return ret;
230 } else {
231 return data[0];
232 }
233 }
234
235 double G1GCPhaseTimes::sum_of_values(double* data) {
236 if (G1CollectedHeap::use_parallel_gc_threads()) {
237 double sum = 0.0;
238 for (uint i = 0; i < _active_gc_threads; i++) {
239 sum += data[i];
240 }
241 return sum;
242 } else {
243 return data[0];
244 }
245 }
246
247 double G1GCPhaseTimes::max_sum(double* data1, double* data2) {
248 double ret = data1[0] + data2[0];
249
250 if (G1CollectedHeap::use_parallel_gc_threads()) {
251 for (uint i = 1; i < _active_gc_threads; ++i) {
252 double data = data1[i] + data2[i];
253 if (data > ret) {
254 ret = data;
255 }
256 }
257 }
258 return ret;
259 }
260
261 void G1GCPhaseTimes::collapse_par_times() {
262 _ext_root_scan_time = avg_value(_par_last_ext_root_scan_times_ms);
263 _satb_filtering_time = avg_value(_par_last_satb_filtering_times_ms);
264 _update_rs_time = avg_value(_par_last_update_rs_times_ms);
265 _update_rs_processed_buffers =
266 sum_of_values(_par_last_update_rs_processed_buffers);
267 _scan_rs_time = avg_value(_par_last_scan_rs_times_ms);
268 _obj_copy_time = avg_value(_par_last_obj_copy_times_ms);
269 _termination_time = avg_value(_par_last_termination_times_ms);
270 }
271
272 double G1GCPhaseTimes::accounted_time_ms() {
273 // Subtract the root region scanning wait time. It's initialized to
274 // zero at the start of the pause.
275 double misc_time_ms = _root_region_scan_wait_time_ms;
276
277 misc_time_ms += _cur_collection_par_time_ms;
278
279 // Now subtract the time taken to fix up roots in generated code
280 misc_time_ms += _cur_collection_code_root_fixup_time_ms;
281
282 // Subtract the time taken to clean the card table from the
283 // current value of "other time"
284 misc_time_ms += _cur_clear_ct_time_ms;
285
286 return misc_time_ms;
287 }
288
289 void G1GCPhaseTimes::print(double pause_time_ms) {
290
291 if (PrintGCTimeStamps) {
292 gclog_or_tty->stamp();
293 gclog_or_tty->print(": ");
294 }
295
296 GCCauseString gc_cause_str = GCCauseString("GC pause", _gc_cause)
297 .append(_is_young_gc ? " (young)" : " (mixed)")
298 .append(_is_initial_mark_gc ? " (initial-mark)" : "");
299 gclog_or_tty->print_cr("[%s, %3.7f secs]", (const char*)gc_cause_str, pause_time_ms / 1000.0);
300
301 if (!G1Log::finer()) {
302 return;
303 }
304
305 if (_root_region_scan_wait_time_ms > 0.0) {
306 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
307 }
308 if (G1CollectedHeap::use_parallel_gc_threads()) {
309 print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
310 print_par_stats(2, "GC Worker Start", _par_last_gc_worker_start_times_ms);
311 print_par_stats(2, "Ext Root Scanning", _par_last_ext_root_scan_times_ms);
312 if (_satb_filtering_time > 0.0) {
313 print_par_stats(2, "SATB Filtering", _par_last_satb_filtering_times_ms);
314 }
315 print_par_stats(2, "Update RS", _par_last_update_rs_times_ms);
316 if (G1Log::finest()) {
317 print_par_stats(3, "Processed Buffers", _par_last_update_rs_processed_buffers,
318 false /* showDecimals */);
319 }
320 print_par_stats(2, "Scan RS", _par_last_scan_rs_times_ms);
321 print_par_stats(2, "Object Copy", _par_last_obj_copy_times_ms);
322 print_par_stats(2, "Termination", _par_last_termination_times_ms);
323 if (G1Log::finest()) {
324 print_par_stats(3, "Termination Attempts", _par_last_termination_attempts,
325 false /* showDecimals */);
326 }
327 print_par_stats(2, "GC Worker Other", _par_last_gc_worker_other_times_ms);
328 print_par_stats(2, "GC Worker Total", _par_last_gc_worker_times_ms);
329 print_par_stats(2, "GC Worker End", _par_last_gc_worker_end_times_ms);
330 } else {
331 print_stats(1, "Ext Root Scanning", _ext_root_scan_time);
332 if (_satb_filtering_time > 0.0) {
333 print_stats(1, "SATB Filtering", _satb_filtering_time);
334 }
335 print_stats(1, "Update RS", _update_rs_time);
336 if (G1Log::finest()) {
337 print_stats(2, "Processed Buffers", (int)_update_rs_processed_buffers);
338 }
339 print_stats(1, "Scan RS", _scan_rs_time);
340 print_stats(1, "Object Copying", _obj_copy_time);
341 }
342 print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
343 print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
344 if (Verbose && G1Log::finest()) {
345 print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
346 print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms);
347 print_stats(1, "Min Clear CC", _min_clear_cc_time_ms);
348 print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
349 if (_num_cc_clears > 0) {
350 print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
351 }
352 }
353 double misc_time_ms = pause_time_ms - accounted_time_ms();
354 print_stats(1, "Other", misc_time_ms);
355 print_stats(2, "Choose CSet",
356 (_recorded_young_cset_choice_time_ms +
357 _recorded_non_young_cset_choice_time_ms));
358 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
359 print_stats(2, "Ref Enq", _cur_ref_enq_time_ms);
360 print_stats(2, "Free CSet",
|
62 }
63 #endif
64
65 void append(const char* format, ...) {
66 va_list ap;
67 va_start(ap, format);
68 vappend(format, ap);
69 va_end(ap);
70 }
71
72 void append_and_print_cr(const char* format, ...) {
73 va_list ap;
74 va_start(ap, format);
75 vappend(format, ap);
76 va_end(ap);
77 gclog_or_tty->print_cr("%s", _buffer);
78 _cur = _indent_level * INDENT_CHARS;
79 }
80 };
81
82 template <class T>
83 void WorkerDataArray<T>::print(int level, const char* title) {
84 if (_length == 1) {
85 // No need for min, max, average and sum for only one worker
86 LineBuffer buf(level);
87 buf.append("[%s: ", title);
88 buf.append(_print_format, _data[0]);
89 buf.append_and_print_cr("]");
90 return;
91 }
92
93 T min = _data[0];
94 T max = _data[0];
95 T sum = 0;
96
97 LineBuffer buf(level);
98 buf.append("[%s:", title);
99 for (uint i = 0; i < _length; ++i) {
100 T val = _data[i];
101 min = MIN2(val, min);
102 max = MAX2(val, max);
103 sum += val;
104 if (G1Log::finest()) {
105 buf.append(" ");
106 buf.append(_print_format, val);
107 }
108 }
109
110 if (G1Log::finest()) {
111 buf.append_and_print_cr("");
112 }
113
114 double avg = (double)sum / (double)_length;
115 buf.append(" Min: ");
116 buf.append(_print_format, min);
117 buf.append(", Avg: ");
118 buf.append("%.1lf", avg); // Always print average as a double
119 buf.append(", Max: ");
120 buf.append(_print_format, max);
121 buf.append(", Diff: ");
122 buf.append(_print_format, max - min);
123 if (_print_sum) {
124 // for things like the start and end times the sum is not
125 // that relevant
126 buf.append(", Sum: ");
127 buf.append(_print_format, sum);
128 }
129 buf.append_and_print_cr("]");
130 }
131
132 #ifdef ASSERT
133
134 template <class T>
135 void WorkerDataArray<T>::reset() {
136 for (uint i = 0; i < _length; i++) {
137 _data[i] = (T)-1;
138 }
139 }
140
141 template <class T>
142 void WorkerDataArray<T>::verify() {
143 for (uint i = 0; i < _length; i++) {
144 assert(_data[i] >= (T)0, err_msg("Invalid data for worker %d", i));
145 }
146 }
147
148 #endif
149
150 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
151 _max_gc_threads(max_gc_threads),
152 _min_clear_cc_time_ms(-1.0),
153 _max_clear_cc_time_ms(-1.0),
154 _cur_clear_cc_time_ms(0.0),
155 _cum_clear_cc_time_ms(0.0),
156 _num_cc_clears(0L),
157 _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false),
158 _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"),
159 _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"),
160 _last_update_rs_times_ms(_max_gc_threads, "%.1lf"),
161 _last_update_rs_processed_buffers(_max_gc_threads, "%d"),
162 _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"),
163 _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"),
164 _last_termination_times_ms(_max_gc_threads, "%.1lf"),
165 _last_termination_attempts(_max_gc_threads, SIZE_FORMAT),
166 _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false),
167 _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"),
168 _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf")
169 {
170 assert(max_gc_threads > 0, "Must have some GC threads");
171 }
172
173 void G1GCPhaseTimes::note_gc_start(double pause_start_time_sec, uint active_gc_threads,
174 bool is_young_gc, bool is_initial_mark_gc, GCCause::Cause gc_cause) {
175 assert(active_gc_threads > 0, "The number of threads must be > 0");
176 assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads");
177 _active_gc_threads = active_gc_threads;
178 _pause_start_time_sec = pause_start_time_sec;
179 _is_young_gc = is_young_gc;
180 _is_initial_mark_gc = is_initial_mark_gc;
181 _gc_cause = gc_cause;
182
183 _last_gc_worker_start_times_ms.reset();
184 _last_ext_root_scan_times_ms.reset();
185 _last_satb_filtering_times_ms.reset();
186 _last_update_rs_times_ms.reset();
187 _last_update_rs_processed_buffers.reset();
188 _last_scan_rs_times_ms.reset();
189 _last_obj_copy_times_ms.reset();
190 _last_termination_times_ms.reset();
191 _last_termination_attempts.reset();
192 _last_gc_worker_end_times_ms.reset();
193 _last_gc_worker_times_ms.reset();
194 _last_gc_worker_other_times_ms.reset();
195 }
196
197 void G1GCPhaseTimes::note_gc_end(double pause_end_time_sec) {
198 _last_gc_worker_start_times_ms.verify();
199 _last_ext_root_scan_times_ms.verify();
200 _last_satb_filtering_times_ms.verify();
201 _last_update_rs_times_ms.verify();
202 _last_update_rs_processed_buffers.verify();
203 _last_scan_rs_times_ms.verify();
204 _last_obj_copy_times_ms.verify();
205 _last_termination_times_ms.verify();
206 _last_termination_attempts.verify();
207 _last_gc_worker_end_times_ms.verify();
208
209 if (G1Log::fine()) {
210 double pause_time_ms = (pause_end_time_sec - _pause_start_time_sec) * MILLIUNITS;
211
212 for (uint i = 0; i < _active_gc_threads; i++) {
213 _last_gc_worker_times_ms.set(i,
214 _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i));
215
216 double worker_known_time = _last_ext_root_scan_times_ms.get(i) +
217 _last_satb_filtering_times_ms.get(i) +
218 _last_update_rs_times_ms.get(i) +
219 _last_scan_rs_times_ms.get(i) +
220 _last_obj_copy_times_ms.get(i) +
221 _last_termination_times_ms.get(i);
222
223 _last_gc_worker_other_times_ms.set(i,
224 _last_gc_worker_times_ms.get(i) - worker_known_time);
225 }
226
227 _last_gc_worker_times_ms.verify();
228 _last_gc_worker_other_times_ms.verify();
229
230 print(pause_time_ms);
231 }
232
233 }
234
235 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) {
236 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value);
237 }
238
239 void G1GCPhaseTimes::print_stats(int level, const char* str, double value, int workers) {
240 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %d]", str, value, workers);
241 }
242
243 double G1GCPhaseTimes::accounted_time_ms() {
244 // Subtract the root region scanning wait time. It's initialized to
245 // zero at the start of the pause.
246 double misc_time_ms = _root_region_scan_wait_time_ms;
247
248 misc_time_ms += _cur_collection_par_time_ms;
249
250 // Now subtract the time taken to fix up roots in generated code
251 misc_time_ms += _cur_collection_code_root_fixup_time_ms;
252
253 // Subtract the time taken to clean the card table from the
254 // current value of "other time"
255 misc_time_ms += _cur_clear_ct_time_ms;
256
257 return misc_time_ms;
258 }
259
260 void G1GCPhaseTimes::print(double pause_time_ms) {
261
262 if (PrintGCTimeStamps) {
263 gclog_or_tty->stamp();
264 gclog_or_tty->print(": ");
265 }
266
267 GCCauseString gc_cause_str = GCCauseString("GC pause", _gc_cause)
268 .append(_is_young_gc ? " (young)" : " (mixed)")
269 .append(_is_initial_mark_gc ? " (initial-mark)" : "");
270 gclog_or_tty->print_cr("[%s, %3.7f secs]", (const char*)gc_cause_str, pause_time_ms / 1000.0);
271
272 if (!G1Log::finer()) {
273 return;
274 }
275
276 if (_root_region_scan_wait_time_ms > 0.0) {
277 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
278 }
279 if (G1CollectedHeap::use_parallel_gc_threads()) {
280 print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
281 _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)");
282 _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)");
283 if (_last_satb_filtering_times_ms.sum() > 0.0) {
284 _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)");
285 }
286 _last_update_rs_times_ms.print(2, "Update RS (ms)");
287 if (G1Log::finest()) {
288 _last_update_rs_processed_buffers.print(3, "Processed Buffers");
289 }
290 _last_scan_rs_times_ms.print(2, "Scan RS (ms)");
291 _last_obj_copy_times_ms.print(2, "Object Copy (ms)");
292 _last_termination_times_ms.print(2, "Termination (ms)");
293 if (G1Log::finest()) {
294 _last_termination_attempts.print(3, "Termination Attempts");
295 }
296 _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)");
297 _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)");
298 _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)");
299 } else {
300 _last_ext_root_scan_times_ms.print(1, "Ext Root Scanning (ms)");
301 if (_last_satb_filtering_times_ms.sum() > 0.0) {
302 _last_satb_filtering_times_ms.print(1, "SATB Filtering (ms)");
303 }
304 _last_update_rs_times_ms.print(1, "Update RS (ms)");
305 if (G1Log::finest()) {
306 _last_update_rs_processed_buffers.print(2, "Processed Buffers");
307 }
308 _last_scan_rs_times_ms.print(1, "Scan RS (ms)");
309 _last_obj_copy_times_ms.print(1, "Object Copy (ms)");
310 }
311 print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
312 print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
313 if (Verbose && G1Log::finest()) {
314 print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
315 print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms);
316 print_stats(1, "Min Clear CC", _min_clear_cc_time_ms);
317 print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
318 if (_num_cc_clears > 0) {
319 print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
320 }
321 }
322 double misc_time_ms = pause_time_ms - accounted_time_ms();
323 print_stats(1, "Other", misc_time_ms);
324 print_stats(2, "Choose CSet",
325 (_recorded_young_cset_choice_time_ms +
326 _recorded_non_young_cset_choice_time_ms));
327 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
328 print_stats(2, "Ref Enq", _cur_ref_enq_time_ms);
329 print_stats(2, "Free CSet",
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