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comparison src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp @ 6628:bb3f6194fedb

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7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code Summary: Also reviewed by vitalyd@gmail.com. Introduced the WorkerDataArray class. Fixed some minor logging bugs. Reviewed-by: johnc, mgerdin
author brutisso
date Thu, 23 Aug 2012 10:21:12 +0200
parents 922993931b3d
children 5baec2e69518
comparison
equal deleted inserted replaced
6625:153776c4cb6f 6628:bb3f6194fedb
77 gclog_or_tty->print_cr("%s", _buffer); 77 gclog_or_tty->print_cr("%s", _buffer);
78 _cur = _indent_level * INDENT_CHARS; 78 _cur = _indent_level * INDENT_CHARS;
79 } 79 }
80 }; 80 };
81 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
82 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) : 150 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
83 _max_gc_threads(max_gc_threads), 151 _max_gc_threads(max_gc_threads),
84 _min_clear_cc_time_ms(-1.0), 152 _min_clear_cc_time_ms(-1.0),
85 _max_clear_cc_time_ms(-1.0), 153 _max_clear_cc_time_ms(-1.0),
86 _cur_clear_cc_time_ms(0.0), 154 _cur_clear_cc_time_ms(0.0),
87 _cum_clear_cc_time_ms(0.0), 155 _cum_clear_cc_time_ms(0.0),
88 _num_cc_clears(0L) 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")
89 { 169 {
90 assert(max_gc_threads > 0, "Must have some GC threads"); 170 assert(max_gc_threads > 0, "Must have some GC threads");
91 _par_last_gc_worker_start_times_ms = new double[_max_gc_threads]; 171 }
92 _par_last_ext_root_scan_times_ms = new double[_max_gc_threads]; 172
93 _par_last_satb_filtering_times_ms = new double[_max_gc_threads]; 173 void G1GCPhaseTimes::note_gc_start(uint active_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"); 174 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"); 175 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; 176 _active_gc_threads = active_gc_threads;
110 _pause_start_time_sec = pause_start_time_sec; 177
111 _is_young_gc = is_young_gc; 178 _last_gc_worker_start_times_ms.reset();
112 _is_initial_mark_gc = is_initial_mark_gc; 179 _last_ext_root_scan_times_ms.reset();
113 _gc_cause = gc_cause; 180 _last_satb_filtering_times_ms.reset();
114 181 _last_update_rs_times_ms.reset();
115 #ifdef ASSERT 182 _last_update_rs_processed_buffers.reset();
116 // initialise the timing data to something well known so that we can spot 183 _last_scan_rs_times_ms.reset();
117 // if something is not set properly 184 _last_obj_copy_times_ms.reset();
118 185 _last_termination_times_ms.reset();
119 for (uint i = 0; i < _max_gc_threads; ++i) { 186 _last_termination_attempts.reset();
120 _par_last_gc_worker_start_times_ms[i] = -1234.0; 187 _last_gc_worker_end_times_ms.reset();
121 _par_last_ext_root_scan_times_ms[i] = -1234.0; 188 _last_gc_worker_times_ms.reset();
122 _par_last_satb_filtering_times_ms[i] = -1234.0; 189 _last_gc_worker_other_times_ms.reset();
123 _par_last_update_rs_times_ms[i] = -1234.0; 190 }
124 _par_last_update_rs_processed_buffers[i] = -1234.0; 191
125 _par_last_scan_rs_times_ms[i] = -1234.0; 192 void G1GCPhaseTimes::note_gc_end() {
126 _par_last_obj_copy_times_ms[i] = -1234.0; 193 _last_gc_worker_start_times_ms.verify();
127 _par_last_termination_times_ms[i] = -1234.0; 194 _last_ext_root_scan_times_ms.verify();
128 _par_last_termination_attempts[i] = -1234.0; 195 _last_satb_filtering_times_ms.verify();
129 _par_last_gc_worker_end_times_ms[i] = -1234.0; 196 _last_update_rs_times_ms.verify();
130 _par_last_gc_worker_times_ms[i] = -1234.0; 197 _last_update_rs_processed_buffers.verify();
131 _par_last_gc_worker_other_times_ms[i] = -1234.0; 198 _last_scan_rs_times_ms.verify();
132 } 199 _last_obj_copy_times_ms.verify();
133 #endif 200 _last_termination_times_ms.verify();
134 } 201 _last_termination_attempts.verify();
135 202 _last_gc_worker_end_times_ms.verify();
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;
139 203
140 for (uint i = 0; i < _active_gc_threads; i++) { 204 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] - 205 double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i);
142 _par_last_gc_worker_start_times_ms[i]; 206 _last_gc_worker_times_ms.set(i, worker_time);
143 207
144 double worker_known_time = _par_last_ext_root_scan_times_ms[i] + 208 double worker_known_time = _last_ext_root_scan_times_ms.get(i) +
145 _par_last_satb_filtering_times_ms[i] + 209 _last_satb_filtering_times_ms.get(i) +
146 _par_last_update_rs_times_ms[i] + 210 _last_update_rs_times_ms.get(i) +
147 _par_last_scan_rs_times_ms[i] + 211 _last_scan_rs_times_ms.get(i) +
148 _par_last_obj_copy_times_ms[i] + 212 _last_obj_copy_times_ms.get(i) +
149 _par_last_termination_times_ms[i]; 213 _last_termination_times_ms.get(i);
150 214
151 _par_last_gc_worker_other_times_ms[i] = _par_last_gc_worker_times_ms[i] - 215 double worker_other_time = worker_time - worker_known_time;
152 worker_known_time; 216 _last_gc_worker_other_times_ms.set(i, worker_other_time);
153 } 217 }
154 218
155 print(pause_time_ms); 219 _last_gc_worker_times_ms.verify();
156 } 220 _last_gc_worker_other_times_ms.verify();
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 } 221 }
196 222
197 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) { 223 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) {
198 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value); 224 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value);
199 } 225 }
200 226
201 void G1GCPhaseTimes::print_stats(int level, const char* str, double value, int workers) { 227 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); 228 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 } 229 }
271 230
272 double G1GCPhaseTimes::accounted_time_ms() { 231 double G1GCPhaseTimes::accounted_time_ms() {
273 // Subtract the root region scanning wait time. It's initialized to 232 // Subtract the root region scanning wait time. It's initialized to
274 // zero at the start of the pause. 233 // zero at the start of the pause.
284 misc_time_ms += _cur_clear_ct_time_ms; 243 misc_time_ms += _cur_clear_ct_time_ms;
285 244
286 return misc_time_ms; 245 return misc_time_ms;
287 } 246 }
288 247
289 void G1GCPhaseTimes::print(double pause_time_ms) { 248 void G1GCPhaseTimes::print(double pause_time_sec) {
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) { 249 if (_root_region_scan_wait_time_ms > 0.0) {
306 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms); 250 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
307 } 251 }
308 if (G1CollectedHeap::use_parallel_gc_threads()) { 252 if (G1CollectedHeap::use_parallel_gc_threads()) {
309 print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads); 253 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); 254 _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)");
311 print_par_stats(2, "Ext Root Scanning", _par_last_ext_root_scan_times_ms); 255 _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)");
312 if (_satb_filtering_time > 0.0) { 256 if (_last_satb_filtering_times_ms.sum() > 0.0) {
313 print_par_stats(2, "SATB Filtering", _par_last_satb_filtering_times_ms); 257 _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)");
314 } 258 }
315 print_par_stats(2, "Update RS", _par_last_update_rs_times_ms); 259 _last_update_rs_times_ms.print(2, "Update RS (ms)");
260 _last_update_rs_processed_buffers.print(3, "Processed Buffers");
261 _last_scan_rs_times_ms.print(2, "Scan RS (ms)");
262 _last_obj_copy_times_ms.print(2, "Object Copy (ms)");
263 _last_termination_times_ms.print(2, "Termination (ms)");
316 if (G1Log::finest()) { 264 if (G1Log::finest()) {
317 print_par_stats(3, "Processed Buffers", _par_last_update_rs_processed_buffers, 265 _last_termination_attempts.print(3, "Termination Attempts");
318 false /* showDecimals */); 266 }
319 } 267 _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)");
320 print_par_stats(2, "Scan RS", _par_last_scan_rs_times_ms); 268 _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)");
321 print_par_stats(2, "Object Copy", _par_last_obj_copy_times_ms); 269 _last_gc_worker_end_times_ms.print(2, "GC Worker End (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 { 270 } else {
331 print_stats(1, "Ext Root Scanning", _ext_root_scan_time); 271 _last_ext_root_scan_times_ms.print(1, "Ext Root Scanning (ms)");
332 if (_satb_filtering_time > 0.0) { 272 if (_last_satb_filtering_times_ms.sum() > 0.0) {
333 print_stats(1, "SATB Filtering", _satb_filtering_time); 273 _last_satb_filtering_times_ms.print(1, "SATB Filtering (ms)");
334 } 274 }
335 print_stats(1, "Update RS", _update_rs_time); 275 _last_update_rs_times_ms.print(1, "Update RS (ms)");
336 if (G1Log::finest()) { 276 _last_update_rs_processed_buffers.print(2, "Processed Buffers");
337 print_stats(2, "Processed Buffers", (int)_update_rs_processed_buffers); 277 _last_scan_rs_times_ms.print(1, "Scan RS (ms)");
338 } 278 _last_obj_copy_times_ms.print(1, "Object Copy (ms)");
339 print_stats(1, "Scan RS", _scan_rs_time);
340 print_stats(1, "Object Copying", _obj_copy_time);
341 } 279 }
342 print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms); 280 print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
343 print_stats(1, "Clear CT", _cur_clear_ct_time_ms); 281 print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
344 if (Verbose && G1Log::finest()) { 282 if (Verbose && G1Log::finest()) {
345 print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms); 283 print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
348 print_stats(1, "Max Clear CC", _max_clear_cc_time_ms); 286 print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
349 if (_num_cc_clears > 0) { 287 if (_num_cc_clears > 0) {
350 print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears)); 288 print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
351 } 289 }
352 } 290 }
353 double misc_time_ms = pause_time_ms - accounted_time_ms(); 291 double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms();
354 print_stats(1, "Other", misc_time_ms); 292 print_stats(1, "Other", misc_time_ms);
293 if (_cur_verify_before_time_ms > 0.0) {
294 print_stats(2, "Verify Before", _cur_verify_before_time_ms);
295 }
355 print_stats(2, "Choose CSet", 296 print_stats(2, "Choose CSet",
356 (_recorded_young_cset_choice_time_ms + 297 (_recorded_young_cset_choice_time_ms +
357 _recorded_non_young_cset_choice_time_ms)); 298 _recorded_non_young_cset_choice_time_ms));
358 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms); 299 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
359 print_stats(2, "Ref Enq", _cur_ref_enq_time_ms); 300 print_stats(2, "Ref Enq", _cur_ref_enq_time_ms);
360 print_stats(2, "Free CSet", 301 print_stats(2, "Free CSet",
361 (_recorded_young_free_cset_time_ms + 302 (_recorded_young_free_cset_time_ms +
362 _recorded_non_young_free_cset_time_ms)); 303 _recorded_non_young_free_cset_time_ms));
304 if (_cur_verify_after_time_ms > 0.0) {
305 print_stats(2, "Verify After", _cur_verify_after_time_ms);
306 }
363 } 307 }
364 308
365 void G1GCPhaseTimes::record_cc_clear_time_ms(double ms) { 309 void G1GCPhaseTimes::record_cc_clear_time_ms(double ms) {
366 if (!(Verbose && G1Log::finest())) { 310 if (!(Verbose && G1Log::finest())) {
367 return; 311 return;