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
26 #include "precompiled.hpp"
27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
28 #include "gc_implementation/g1/g1GCPhaseTimes.hpp"
29 #include "gc_implementation/g1/g1Log.hpp"
30
31 // Helper class for avoiding interleaved logging
32 class LineBuffer: public StackObj {
33
34 private:
35 static const int BUFFER_LEN = 1024;
36 static const int INDENT_CHARS = 3;
37 char _buffer[BUFFER_LEN];
38 int _indent_level;
39 int _cur;
40
41 void vappend(const char* format, va_list ap) {
42 int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap);
43 if (res != -1) {
44 _cur += res;
45 } else {
46 DEBUG_ONLY(warning("buffer too small in LineBuffer");)
47 _buffer[BUFFER_LEN -1] = 0;
48 _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again
49 }
151 }
152 }
153
154 #endif
155
156 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
157 _max_gc_threads(max_gc_threads),
158 _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false),
159 _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"),
160 _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"),
161 _last_update_rs_times_ms(_max_gc_threads, "%.1lf"),
162 _last_update_rs_processed_buffers(_max_gc_threads, "%d"),
163 _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"),
164 _last_strong_code_root_scan_times_ms(_max_gc_threads, "%.1lf"),
165 _last_strong_code_root_mark_times_ms(_max_gc_threads, "%.1lf"),
166 _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"),
167 _last_termination_times_ms(_max_gc_threads, "%.1lf"),
168 _last_termination_attempts(_max_gc_threads, SIZE_FORMAT),
169 _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false),
170 _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"),
171 _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf")
172 {
173 assert(max_gc_threads > 0, "Must have some GC threads");
174 }
175
176 void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) {
177 assert(active_gc_threads > 0, "The number of threads must be > 0");
178 assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads");
179 _active_gc_threads = active_gc_threads;
180
181 _last_gc_worker_start_times_ms.reset();
182 _last_ext_root_scan_times_ms.reset();
183 _last_satb_filtering_times_ms.reset();
184 _last_update_rs_times_ms.reset();
185 _last_update_rs_processed_buffers.reset();
186 _last_scan_rs_times_ms.reset();
187 _last_strong_code_root_scan_times_ms.reset();
188 _last_strong_code_root_mark_times_ms.reset();
189 _last_obj_copy_times_ms.reset();
190 _last_termination_times_ms.reset();
191 _last_termination_attempts.reset();
212 double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i);
213 _last_gc_worker_times_ms.set(i, worker_time);
214
215 double worker_known_time = _last_ext_root_scan_times_ms.get(i) +
216 _last_satb_filtering_times_ms.get(i) +
217 _last_update_rs_times_ms.get(i) +
218 _last_scan_rs_times_ms.get(i) +
219 _last_strong_code_root_scan_times_ms.get(i) +
220 _last_strong_code_root_mark_times_ms.get(i) +
221 _last_obj_copy_times_ms.get(i) +
222 _last_termination_times_ms.get(i);
223
224 double worker_other_time = worker_time - worker_known_time;
225 _last_gc_worker_other_times_ms.set(i, worker_other_time);
226 }
227
228 _last_gc_worker_times_ms.verify();
229 _last_gc_worker_other_times_ms.verify();
230 }
231
232 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) {
233 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value);
234 }
235
236 void G1GCPhaseTimes::print_stats(int level, const char* str, double value, int workers) {
237 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %d]", str, value, workers);
238 }
239
240 double G1GCPhaseTimes::accounted_time_ms() {
241 // Subtract the root region scanning wait time. It's initialized to
242 // zero at the start of the pause.
243 double misc_time_ms = _root_region_scan_wait_time_ms;
244
245 misc_time_ms += _cur_collection_par_time_ms;
246
247 // Now subtract the time taken to fix up roots in generated code
248 misc_time_ms += _cur_collection_code_root_fixup_time_ms;
249
250 // Strong code root migration time
251 misc_time_ms += _cur_strong_code_root_migration_time_ms;
252
253 // Strong code root purge time
254 misc_time_ms += _cur_strong_code_root_purge_time_ms;
255
256 // Subtract the time taken to clean the card table from the
257 // current value of "other time"
258 misc_time_ms += _cur_clear_ct_time_ms;
259
260 return misc_time_ms;
261 }
262
263 void G1GCPhaseTimes::print(double pause_time_sec) {
264 if (_root_region_scan_wait_time_ms > 0.0) {
265 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
266 }
267 if (G1CollectedHeap::use_parallel_gc_threads()) {
268 print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
269 _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)");
270 _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)");
271 if (_last_satb_filtering_times_ms.sum() > 0.0) {
272 _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)");
273 }
274 if (_last_strong_code_root_mark_times_ms.sum() > 0.0) {
275 _last_strong_code_root_mark_times_ms.print(2, "Code Root Marking (ms)");
286 _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)");
287 _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)");
288 _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)");
289 } else {
290 _last_ext_root_scan_times_ms.print(1, "Ext Root Scanning (ms)");
291 if (_last_satb_filtering_times_ms.sum() > 0.0) {
292 _last_satb_filtering_times_ms.print(1, "SATB Filtering (ms)");
293 }
294 if (_last_strong_code_root_mark_times_ms.sum() > 0.0) {
295 _last_strong_code_root_mark_times_ms.print(1, "Code Root Marking (ms)");
296 }
297 _last_update_rs_times_ms.print(1, "Update RS (ms)");
298 _last_update_rs_processed_buffers.print(2, "Processed Buffers");
299 _last_scan_rs_times_ms.print(1, "Scan RS (ms)");
300 _last_strong_code_root_scan_times_ms.print(1, "Code Root Scanning (ms)");
301 _last_obj_copy_times_ms.print(1, "Object Copy (ms)");
302 }
303 print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
304 print_stats(1, "Code Root Migration", _cur_strong_code_root_migration_time_ms);
305 print_stats(1, "Code Root Purge", _cur_strong_code_root_purge_time_ms);
306 print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
307 double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms();
308 print_stats(1, "Other", misc_time_ms);
309 if (_cur_verify_before_time_ms > 0.0) {
310 print_stats(2, "Verify Before", _cur_verify_before_time_ms);
311 }
312 if (G1CollectedHeap::heap()->evacuation_failed()) {
313 double evac_fail_handling = _cur_evac_fail_recalc_used + _cur_evac_fail_remove_self_forwards +
314 _cur_evac_fail_restore_remsets;
315 print_stats(2, "Evacuation Failure", evac_fail_handling);
316 if (G1Log::finest()) {
317 print_stats(3, "Recalculate Used", _cur_evac_fail_recalc_used);
318 print_stats(3, "Remove Self Forwards", _cur_evac_fail_remove_self_forwards);
319 print_stats(3, "Restore RemSet", _cur_evac_fail_restore_remsets);
320 }
321 }
322 print_stats(2, "Choose CSet",
323 (_recorded_young_cset_choice_time_ms +
324 _recorded_non_young_cset_choice_time_ms));
325 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
|
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
26 #include "precompiled.hpp"
27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
28 #include "gc_implementation/g1/g1GCPhaseTimes.hpp"
29 #include "gc_implementation/g1/g1Log.hpp"
30 #include "gc_implementation/g1/g1StringDedup.hpp"
31
32 // Helper class for avoiding interleaved logging
33 class LineBuffer: public StackObj {
34
35 private:
36 static const int BUFFER_LEN = 1024;
37 static const int INDENT_CHARS = 3;
38 char _buffer[BUFFER_LEN];
39 int _indent_level;
40 int _cur;
41
42 void vappend(const char* format, va_list ap) {
43 int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap);
44 if (res != -1) {
45 _cur += res;
46 } else {
47 DEBUG_ONLY(warning("buffer too small in LineBuffer");)
48 _buffer[BUFFER_LEN -1] = 0;
49 _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again
50 }
152 }
153 }
154
155 #endif
156
157 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
158 _max_gc_threads(max_gc_threads),
159 _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false),
160 _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"),
161 _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"),
162 _last_update_rs_times_ms(_max_gc_threads, "%.1lf"),
163 _last_update_rs_processed_buffers(_max_gc_threads, "%d"),
164 _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"),
165 _last_strong_code_root_scan_times_ms(_max_gc_threads, "%.1lf"),
166 _last_strong_code_root_mark_times_ms(_max_gc_threads, "%.1lf"),
167 _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"),
168 _last_termination_times_ms(_max_gc_threads, "%.1lf"),
169 _last_termination_attempts(_max_gc_threads, SIZE_FORMAT),
170 _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false),
171 _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"),
172 _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf"),
173 _cur_string_dedup_queue_fixup_worker_times_ms(_max_gc_threads, "%.1lf"),
174 _cur_string_dedup_table_fixup_worker_times_ms(_max_gc_threads, "%.1lf")
175 {
176 assert(max_gc_threads > 0, "Must have some GC threads");
177 }
178
179 void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) {
180 assert(active_gc_threads > 0, "The number of threads must be > 0");
181 assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads");
182 _active_gc_threads = active_gc_threads;
183
184 _last_gc_worker_start_times_ms.reset();
185 _last_ext_root_scan_times_ms.reset();
186 _last_satb_filtering_times_ms.reset();
187 _last_update_rs_times_ms.reset();
188 _last_update_rs_processed_buffers.reset();
189 _last_scan_rs_times_ms.reset();
190 _last_strong_code_root_scan_times_ms.reset();
191 _last_strong_code_root_mark_times_ms.reset();
192 _last_obj_copy_times_ms.reset();
193 _last_termination_times_ms.reset();
194 _last_termination_attempts.reset();
215 double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i);
216 _last_gc_worker_times_ms.set(i, worker_time);
217
218 double worker_known_time = _last_ext_root_scan_times_ms.get(i) +
219 _last_satb_filtering_times_ms.get(i) +
220 _last_update_rs_times_ms.get(i) +
221 _last_scan_rs_times_ms.get(i) +
222 _last_strong_code_root_scan_times_ms.get(i) +
223 _last_strong_code_root_mark_times_ms.get(i) +
224 _last_obj_copy_times_ms.get(i) +
225 _last_termination_times_ms.get(i);
226
227 double worker_other_time = worker_time - worker_known_time;
228 _last_gc_worker_other_times_ms.set(i, worker_other_time);
229 }
230
231 _last_gc_worker_times_ms.verify();
232 _last_gc_worker_other_times_ms.verify();
233 }
234
235 void G1GCPhaseTimes::note_string_dedup_fixup_start() {
236 _cur_string_dedup_queue_fixup_worker_times_ms.reset();
237 _cur_string_dedup_table_fixup_worker_times_ms.reset();
238 }
239
240 void G1GCPhaseTimes::note_string_dedup_fixup_end() {
241 _cur_string_dedup_queue_fixup_worker_times_ms.verify();
242 _cur_string_dedup_table_fixup_worker_times_ms.verify();
243 }
244
245 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) {
246 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value);
247 }
248
249 void G1GCPhaseTimes::print_stats(int level, const char* str, double value, int workers) {
250 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %d]", str, value, workers);
251 }
252
253 double G1GCPhaseTimes::accounted_time_ms() {
254 // Subtract the root region scanning wait time. It's initialized to
255 // zero at the start of the pause.
256 double misc_time_ms = _root_region_scan_wait_time_ms;
257
258 misc_time_ms += _cur_collection_par_time_ms;
259
260 // Now subtract the time taken to fix up roots in generated code
261 misc_time_ms += _cur_collection_code_root_fixup_time_ms;
262
263 // Strong code root migration time
264 misc_time_ms += _cur_strong_code_root_migration_time_ms;
265
266 // Strong code root purge time
267 misc_time_ms += _cur_strong_code_root_purge_time_ms;
268
269 if (G1StringDedup::is_enabled()) {
270 // String dedup fixup time
271 misc_time_ms += _cur_string_dedup_fixup_time_ms;
272 }
273
274 // Subtract the time taken to clean the card table from the
275 // current value of "other time"
276 misc_time_ms += _cur_clear_ct_time_ms;
277
278 return misc_time_ms;
279 }
280
281 void G1GCPhaseTimes::print(double pause_time_sec) {
282 if (_root_region_scan_wait_time_ms > 0.0) {
283 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
284 }
285 if (G1CollectedHeap::use_parallel_gc_threads()) {
286 print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
287 _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)");
288 _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)");
289 if (_last_satb_filtering_times_ms.sum() > 0.0) {
290 _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)");
291 }
292 if (_last_strong_code_root_mark_times_ms.sum() > 0.0) {
293 _last_strong_code_root_mark_times_ms.print(2, "Code Root Marking (ms)");
304 _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)");
305 _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)");
306 _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)");
307 } else {
308 _last_ext_root_scan_times_ms.print(1, "Ext Root Scanning (ms)");
309 if (_last_satb_filtering_times_ms.sum() > 0.0) {
310 _last_satb_filtering_times_ms.print(1, "SATB Filtering (ms)");
311 }
312 if (_last_strong_code_root_mark_times_ms.sum() > 0.0) {
313 _last_strong_code_root_mark_times_ms.print(1, "Code Root Marking (ms)");
314 }
315 _last_update_rs_times_ms.print(1, "Update RS (ms)");
316 _last_update_rs_processed_buffers.print(2, "Processed Buffers");
317 _last_scan_rs_times_ms.print(1, "Scan RS (ms)");
318 _last_strong_code_root_scan_times_ms.print(1, "Code Root Scanning (ms)");
319 _last_obj_copy_times_ms.print(1, "Object Copy (ms)");
320 }
321 print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
322 print_stats(1, "Code Root Migration", _cur_strong_code_root_migration_time_ms);
323 print_stats(1, "Code Root Purge", _cur_strong_code_root_purge_time_ms);
324 if (G1StringDedup::is_enabled()) {
325 print_stats(1, "String Dedup Fixup", _cur_string_dedup_fixup_time_ms, _active_gc_threads);
326 _cur_string_dedup_queue_fixup_worker_times_ms.print(2, "Queue Fixup (ms)");
327 _cur_string_dedup_table_fixup_worker_times_ms.print(2, "Table Fixup (ms)");
328 }
329 print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
330 double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms();
331 print_stats(1, "Other", misc_time_ms);
332 if (_cur_verify_before_time_ms > 0.0) {
333 print_stats(2, "Verify Before", _cur_verify_before_time_ms);
334 }
335 if (G1CollectedHeap::heap()->evacuation_failed()) {
336 double evac_fail_handling = _cur_evac_fail_recalc_used + _cur_evac_fail_remove_self_forwards +
337 _cur_evac_fail_restore_remsets;
338 print_stats(2, "Evacuation Failure", evac_fail_handling);
339 if (G1Log::finest()) {
340 print_stats(3, "Recalculate Used", _cur_evac_fail_recalc_used);
341 print_stats(3, "Remove Self Forwards", _cur_evac_fail_remove_self_forwards);
342 print_stats(3, "Restore RemSet", _cur_evac_fail_restore_remsets);
343 }
344 }
345 print_stats(2, "Choose CSet",
346 (_recorded_young_cset_choice_time_ms +
347 _recorded_non_young_cset_choice_time_ms));
348 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
|