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/g1ConcurrentRefine.hpp"
28 #include "gc/g1/g1ConcurrentRefineThread.hpp"
29 #include "gc/g1/g1DirtyCardQueue.hpp"
30 #include "gc/g1/g1RemSet.hpp"
31 #include "gc/g1/g1RemSetSummary.hpp"
32 #include "gc/g1/g1YoungRemSetSamplingThread.hpp"
33 #include "gc/g1/heapRegion.hpp"
34 #include "gc/g1/heapRegionRemSet.hpp"
35 #include "memory/allocation.inline.hpp"
36 #include "runtime/thread.inline.hpp"
37
38 class GetRSThreadVTimeClosure : public ThreadClosure {
39 private:
40 G1RemSetSummary* _summary;
41 uint _counter;
42
43 public:
44 GetRSThreadVTimeClosure(G1RemSetSummary * summary) : ThreadClosure(), _summary(summary), _counter(0) {
45 assert(_summary != NULL, "just checking");
46 }
47
48 virtual void do_thread(Thread* t) {
49 G1ConcurrentRefineThread* crt = (G1ConcurrentRefineThread*) t;
50 _summary->set_rs_thread_vtime(_counter, crt->vtime_accum());
51 _counter++;
52 }
53 };
54
55 void G1RemSetSummary::update() {
56 _num_conc_refined_cards = _rem_set->num_conc_refined_cards();
57 G1DirtyCardQueueSet& dcqs = G1BarrierSet::dirty_card_queue_set();
58 _num_processed_buf_mutator = dcqs.processed_buffers_mut();
59 _num_processed_buf_rs_threads = dcqs.processed_buffers_rs_thread();
60
61 _num_coarsenings = HeapRegionRemSet::n_coarsenings();
62
63 G1CollectedHeap* g1h = G1CollectedHeap::heap();
64 G1ConcurrentRefine* cg1r = g1h->concurrent_refine();
65 if (_rs_threads_vtimes != NULL) {
66 GetRSThreadVTimeClosure p(this);
67 cg1r->threads_do(&p);
68 }
69 set_sampling_thread_vtime(g1h->sampling_thread()->vtime_accum());
70 }
71
72 void G1RemSetSummary::set_rs_thread_vtime(uint thread, double value) {
73 assert(_rs_threads_vtimes != NULL, "just checking");
74 assert(thread < _num_vtimes, "just checking");
75 _rs_threads_vtimes[thread] = value;
76 }
77
78 double G1RemSetSummary::rs_thread_vtime(uint thread) const {
79 assert(_rs_threads_vtimes != NULL, "just checking");
80 assert(thread < _num_vtimes, "just checking");
81 return _rs_threads_vtimes[thread];
82 }
83
84 G1RemSetSummary::G1RemSetSummary() :
85 _rem_set(NULL),
86 _num_conc_refined_cards(0),
87 _num_processed_buf_mutator(0),
88 _num_processed_buf_rs_threads(0),
89 _num_coarsenings(0),
90 _num_vtimes(G1ConcurrentRefine::max_num_threads()),
91 _rs_threads_vtimes(NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC)),
92 _sampling_thread_vtime(0.0f) {
93
94 memset(_rs_threads_vtimes, 0, sizeof(double) * _num_vtimes);
95 }
96
97 G1RemSetSummary::G1RemSetSummary(G1RemSet* rem_set) :
98 _rem_set(rem_set),
99 _num_conc_refined_cards(0),
100 _num_processed_buf_mutator(0),
101 _num_processed_buf_rs_threads(0),
102 _num_coarsenings(0),
103 _num_vtimes(G1ConcurrentRefine::max_num_threads()),
104 _rs_threads_vtimes(NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC)),
105 _sampling_thread_vtime(0.0f) {
106 update();
107 }
108
109 G1RemSetSummary::~G1RemSetSummary() {
110 FREE_C_HEAP_ARRAY(double, _rs_threads_vtimes);
111 }
112
113 void G1RemSetSummary::set(G1RemSetSummary* other) {
114 assert(other != NULL, "just checking");
115 assert(_num_vtimes == other->_num_vtimes, "just checking");
116
117 _num_conc_refined_cards = other->num_conc_refined_cards();
118
119 _num_processed_buf_mutator = other->num_processed_buf_mutator();
120 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads();
121
122 _num_coarsenings = other->_num_coarsenings;
123
124 memcpy(_rs_threads_vtimes, other->_rs_threads_vtimes, sizeof(double) * _num_vtimes);
125
126 set_sampling_thread_vtime(other->sampling_thread_vtime());
127 }
128
129 void G1RemSetSummary::subtract_from(G1RemSetSummary* other) {
130 assert(other != NULL, "just checking");
131 assert(_num_vtimes == other->_num_vtimes, "just checking");
132
133 _num_conc_refined_cards = other->num_conc_refined_cards() - _num_conc_refined_cards;
134
135 _num_processed_buf_mutator = other->num_processed_buf_mutator() - _num_processed_buf_mutator;
136 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads() - _num_processed_buf_rs_threads;
137
138 _num_coarsenings = other->num_coarsenings() - _num_coarsenings;
139
140 for (uint i = 0; i < _num_vtimes; i++) {
141 set_rs_thread_vtime(i, other->rs_thread_vtime(i) - rs_thread_vtime(i));
142 }
143
144 _sampling_thread_vtime = other->sampling_thread_vtime() - _sampling_thread_vtime;
145 }
146
147 class RegionTypeCounter {
148 private:
149 const char* _name;
150
151 size_t _rs_mem_size;
152 size_t _cards_occupied;
153 size_t _amount;
154
155 size_t _code_root_mem_size;
156 size_t _code_root_elems;
157
158 double rs_mem_size_percent_of(size_t total) {
159 return percent_of(_rs_mem_size, total);
160 }
161
162 double cards_occupied_percent_of(size_t total) {
163 return percent_of(_cards_occupied, total);
164 }
165
166 double code_root_mem_size_percent_of(size_t total) {
167 return percent_of(_code_root_mem_size, total);
168 }
169
170 double code_root_elems_percent_of(size_t total) {
171 return percent_of(_code_root_elems, total);
172 }
173
174 size_t amount() const { return _amount; }
175
176 public:
177
178 RegionTypeCounter(const char* name) : _name(name), _rs_mem_size(0), _cards_occupied(0),
179 _amount(0), _code_root_mem_size(0), _code_root_elems(0) { }
180
181 void add(size_t rs_mem_size, size_t cards_occupied, size_t code_root_mem_size,
182 size_t code_root_elems) {
183 _rs_mem_size += rs_mem_size;
184 _cards_occupied += cards_occupied;
185 _code_root_mem_size += code_root_mem_size;
186 _code_root_elems += code_root_elems;
187 _amount++;
188 }
189
190 size_t rs_mem_size() const { return _rs_mem_size; }
191 size_t cards_occupied() const { return _cards_occupied; }
192
193 size_t code_root_mem_size() const { return _code_root_mem_size; }
194 size_t code_root_elems() const { return _code_root_elems; }
195
196 void print_rs_mem_info_on(outputStream * out, size_t total) {
197 out->print_cr(" " SIZE_FORMAT_W(8) "%s (%5.1f%%) by " SIZE_FORMAT " %s regions",
198 byte_size_in_proper_unit(rs_mem_size()),
199 proper_unit_for_byte_size(rs_mem_size()),
200 rs_mem_size_percent_of(total), amount(), _name);
201 }
202
203 void print_cards_occupied_info_on(outputStream * out, size_t total) {
204 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) entries by " SIZE_FORMAT " %s regions",
205 cards_occupied(), cards_occupied_percent_of(total), amount(), _name);
206 }
207
208 void print_code_root_mem_info_on(outputStream * out, size_t total) {
209 out->print_cr(" " SIZE_FORMAT_W(8) "%s (%5.1f%%) by " SIZE_FORMAT " %s regions",
210 byte_size_in_proper_unit(code_root_mem_size()),
211 proper_unit_for_byte_size(code_root_mem_size()),
212 code_root_mem_size_percent_of(total), amount(), _name);
213 }
214
215 void print_code_root_elems_info_on(outputStream * out, size_t total) {
216 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) elements by " SIZE_FORMAT " %s regions",
217 code_root_elems(), code_root_elems_percent_of(total), amount(), _name);
218 }
219 };
220
221
222 class HRRSStatsIter: public HeapRegionClosure {
223 private:
224 RegionTypeCounter _young;
225 RegionTypeCounter _humongous;
226 RegionTypeCounter _free;
227 RegionTypeCounter _old;
228 RegionTypeCounter _archive;
229 RegionTypeCounter _all;
230
231 size_t _max_rs_mem_sz;
232 HeapRegion* _max_rs_mem_sz_region;
233
234 size_t total_rs_mem_sz() const { return _all.rs_mem_size(); }
235 size_t total_cards_occupied() const { return _all.cards_occupied(); }
236
237 size_t max_rs_mem_sz() const { return _max_rs_mem_sz; }
238 HeapRegion* max_rs_mem_sz_region() const { return _max_rs_mem_sz_region; }
239
240 size_t _max_code_root_mem_sz;
241 HeapRegion* _max_code_root_mem_sz_region;
242
243 size_t total_code_root_mem_sz() const { return _all.code_root_mem_size(); }
244 size_t total_code_root_elems() const { return _all.code_root_elems(); }
245
246 size_t max_code_root_mem_sz() const { return _max_code_root_mem_sz; }
247 HeapRegion* max_code_root_mem_sz_region() const { return _max_code_root_mem_sz_region; }
248
249 public:
250 HRRSStatsIter() : _young("Young"), _humongous("Humongous"),
251 _free("Free"), _old("Old"), _archive("Archive"), _all("All"),
252 _max_rs_mem_sz(0), _max_rs_mem_sz_region(NULL),
253 _max_code_root_mem_sz(0), _max_code_root_mem_sz_region(NULL)
254 {}
255
256 bool do_heap_region(HeapRegion* r) {
257 HeapRegionRemSet* hrrs = r->rem_set();
258
259 // HeapRegionRemSet::mem_size() includes the
260 // size of the strong code roots
261 size_t rs_mem_sz = hrrs->mem_size();
262 if (rs_mem_sz > _max_rs_mem_sz) {
263 _max_rs_mem_sz = rs_mem_sz;
264 _max_rs_mem_sz_region = r;
265 }
266 size_t occupied_cards = hrrs->occupied();
267 size_t code_root_mem_sz = hrrs->strong_code_roots_mem_size();
268 if (code_root_mem_sz > max_code_root_mem_sz()) {
269 _max_code_root_mem_sz = code_root_mem_sz;
270 _max_code_root_mem_sz_region = r;
271 }
272 size_t code_root_elems = hrrs->strong_code_roots_list_length();
273
274 RegionTypeCounter* current = NULL;
275 if (r->is_free()) {
276 current = &_free;
277 } else if (r->is_young()) {
278 current = &_young;
279 } else if (r->is_humongous()) {
280 current = &_humongous;
281 } else if (r->is_old()) {
282 current = &_old;
283 } else if (r->is_archive()) {
284 current = &_archive;
285 } else {
286 ShouldNotReachHere();
287 }
288 current->add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems);
289 _all.add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems);
290
291 return false;
292 }
293
294 void print_summary_on(outputStream* out) {
295 RegionTypeCounter* counters[] = { &_young, &_humongous, &_free, &_old, &_archive, NULL };
296
297 out->print_cr(" Current rem set statistics");
298 out->print_cr(" Total per region rem sets sizes = " SIZE_FORMAT "%s."
299 " Max = " SIZE_FORMAT "%s.",
300 byte_size_in_proper_unit(total_rs_mem_sz()),
301 proper_unit_for_byte_size(total_rs_mem_sz()),
302 byte_size_in_proper_unit(max_rs_mem_sz()),
303 proper_unit_for_byte_size(max_rs_mem_sz()));
304 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
305 (*current)->print_rs_mem_info_on(out, total_rs_mem_sz());
306 }
307
308 out->print_cr(" Static structures = " SIZE_FORMAT "%s,"
309 " free_lists = " SIZE_FORMAT "%s.",
310 byte_size_in_proper_unit(HeapRegionRemSet::static_mem_size()),
311 proper_unit_for_byte_size(HeapRegionRemSet::static_mem_size()),
312 byte_size_in_proper_unit(HeapRegionRemSet::fl_mem_size()),
313 proper_unit_for_byte_size(HeapRegionRemSet::fl_mem_size()));
314
315 out->print_cr(" " SIZE_FORMAT " occupied cards represented.",
316 total_cards_occupied());
317 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
318 (*current)->print_cards_occupied_info_on(out, total_cards_occupied());
319 }
320
321 // Largest sized rem set region statistics
322 HeapRegionRemSet* rem_set = max_rs_mem_sz_region()->rem_set();
323 out->print_cr(" Region with largest rem set = " HR_FORMAT ", "
324 "size = " SIZE_FORMAT "%s, occupied = " SIZE_FORMAT "%s.",
325 HR_FORMAT_PARAMS(max_rs_mem_sz_region()),
326 byte_size_in_proper_unit(rem_set->mem_size()),
327 proper_unit_for_byte_size(rem_set->mem_size()),
328 byte_size_in_proper_unit(rem_set->occupied()),
329 proper_unit_for_byte_size(rem_set->occupied()));
330 // Strong code root statistics
331 HeapRegionRemSet* max_code_root_rem_set = max_code_root_mem_sz_region()->rem_set();
332 out->print_cr(" Total heap region code root sets sizes = " SIZE_FORMAT "%s."
333 " Max = " SIZE_FORMAT "%s.",
334 byte_size_in_proper_unit(total_code_root_mem_sz()),
335 proper_unit_for_byte_size(total_code_root_mem_sz()),
336 byte_size_in_proper_unit(max_code_root_rem_set->strong_code_roots_mem_size()),
337 proper_unit_for_byte_size(max_code_root_rem_set->strong_code_roots_mem_size()));
338 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
339 (*current)->print_code_root_mem_info_on(out, total_code_root_mem_sz());
340 }
341
342 out->print_cr(" " SIZE_FORMAT " code roots represented.",
343 total_code_root_elems());
344 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
345 (*current)->print_code_root_elems_info_on(out, total_code_root_elems());
346 }
347
348 out->print_cr(" Region with largest amount of code roots = " HR_FORMAT ", "
349 "size = " SIZE_FORMAT "%s, num_elems = " SIZE_FORMAT ".",
350 HR_FORMAT_PARAMS(max_code_root_mem_sz_region()),
351 byte_size_in_proper_unit(max_code_root_rem_set->strong_code_roots_mem_size()),
352 proper_unit_for_byte_size(max_code_root_rem_set->strong_code_roots_mem_size()),
353 max_code_root_rem_set->strong_code_roots_list_length());
354 }
355 };
356
357 void G1RemSetSummary::print_on(outputStream* out) {
358 out->print_cr(" Recent concurrent refinement statistics");
359 out->print_cr(" Processed " SIZE_FORMAT " cards concurrently", num_conc_refined_cards());
360 out->print_cr(" Of " SIZE_FORMAT " completed buffers:", num_processed_buf_total());
361 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) by concurrent RS threads.",
362 num_processed_buf_total(),
363 percent_of(num_processed_buf_rs_threads(), num_processed_buf_total()));
364 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) by mutator threads.",
365 num_processed_buf_mutator(),
366 percent_of(num_processed_buf_mutator(), num_processed_buf_total()));
367 out->print_cr(" Did " SIZE_FORMAT " coarsenings.", num_coarsenings());
368 out->print_cr(" Concurrent RS threads times (s)");
369 out->print(" ");
370 for (uint i = 0; i < _num_vtimes; i++) {
371 out->print(" %5.2f", rs_thread_vtime(i));
372 }
373 out->cr();
374 out->print_cr(" Concurrent sampling threads times (s)");
375 out->print_cr(" %5.2f", sampling_thread_vtime());
376
377 HRRSStatsIter blk;
378 G1CollectedHeap::heap()->heap_region_iterate(&blk);
379 blk.print_summary_on(out);
380 }