1 /*
2 * Copyright (c) 2013, 2018, 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/g1RemSet.hpp"
30 #include "gc/g1/g1RemSetSummary.hpp"
31 #include "gc/g1/g1YoungRemSetSamplingThread.hpp"
32 #include "gc/g1/heapRegion.hpp"
33 #include "gc/g1/heapRegionRemSet.hpp"
34 #include "memory/allocation.inline.hpp"
35 #include "runtime/thread.inline.hpp"
36
37 class GetRSThreadVTimeClosure : public ThreadClosure {
38 private:
39 G1RemSetSummary* _summary;
40 uint _counter;
41
42 public:
43 GetRSThreadVTimeClosure(G1RemSetSummary * summary) : ThreadClosure(), _summary(summary), _counter(0) {
44 assert(_summary != NULL, "just checking");
45 }
46
47 virtual void do_thread(Thread* t) {
48 G1ConcurrentRefineThread* crt = (G1ConcurrentRefineThread*) t;
49 _summary->set_rs_thread_vtime(_counter, crt->vtime_accum());
50 _counter++;
51 }
52 };
53
54 void G1RemSetSummary::update() {
55 _num_conc_refined_cards = _rem_set->num_conc_refined_cards();
56 DirtyCardQueueSet& dcqs = G1BarrierSet::dirty_card_queue_set();
57 _num_processed_buf_mutator = dcqs.processed_buffers_mut();
58 _num_processed_buf_rs_threads = dcqs.processed_buffers_rs_thread();
59
60 _num_coarsenings = HeapRegionRemSet::n_coarsenings();
61
62 G1CollectedHeap* g1h = G1CollectedHeap::heap();
63 G1ConcurrentRefine* cg1r = g1h->concurrent_refine();
64 if (_rs_threads_vtimes != NULL) {
65 GetRSThreadVTimeClosure p(this);
66 cg1r->threads_do(&p);
67 }
68 set_sampling_thread_vtime(g1h->sampling_thread()->vtime_accum());
69 }
70
71 void G1RemSetSummary::set_rs_thread_vtime(uint thread, double value) {
72 assert(_rs_threads_vtimes != NULL, "just checking");
73 assert(thread < _num_vtimes, "just checking");
74 _rs_threads_vtimes[thread] = value;
75 }
76
77 double G1RemSetSummary::rs_thread_vtime(uint thread) const {
78 assert(_rs_threads_vtimes != NULL, "just checking");
79 assert(thread < _num_vtimes, "just checking");
80 return _rs_threads_vtimes[thread];
81 }
82
83 G1RemSetSummary::G1RemSetSummary() :
84 _rem_set(NULL),
85 _num_conc_refined_cards(0),
86 _num_processed_buf_mutator(0),
87 _num_processed_buf_rs_threads(0),
88 _num_coarsenings(0),
89 _num_vtimes(G1ConcurrentRefine::max_num_threads()),
90 _rs_threads_vtimes(NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC)),
91 _sampling_thread_vtime(0.0f) {
92
93 memset(_rs_threads_vtimes, 0, sizeof(double) * _num_vtimes);
94 }
95
96 G1RemSetSummary::G1RemSetSummary(G1RemSet* rem_set) :
97 _rem_set(rem_set),
98 _num_conc_refined_cards(0),
99 _num_processed_buf_mutator(0),
100 _num_processed_buf_rs_threads(0),
101 _num_coarsenings(0),
102 _num_vtimes(G1ConcurrentRefine::max_num_threads()),
103 _rs_threads_vtimes(NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC)),
104 _sampling_thread_vtime(0.0f) {
105 update();
106 }
107
108 G1RemSetSummary::~G1RemSetSummary() {
109 if (_rs_threads_vtimes) {
110 FREE_C_HEAP_ARRAY(double, _rs_threads_vtimes);
111 }
112 }
113
114 void G1RemSetSummary::set(G1RemSetSummary* other) {
115 assert(other != NULL, "just checking");
116 assert(_num_vtimes == other->_num_vtimes, "just checking");
117
118 _num_conc_refined_cards = other->num_conc_refined_cards();
119
120 _num_processed_buf_mutator = other->num_processed_buf_mutator();
121 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads();
122
123 _num_coarsenings = other->_num_coarsenings;
124
125 memcpy(_rs_threads_vtimes, other->_rs_threads_vtimes, sizeof(double) * _num_vtimes);
126
127 set_sampling_thread_vtime(other->sampling_thread_vtime());
128 }
129
130 void G1RemSetSummary::subtract_from(G1RemSetSummary* other) {
131 assert(other != NULL, "just checking");
132 assert(_num_vtimes == other->_num_vtimes, "just checking");
133
134 _num_conc_refined_cards = other->num_conc_refined_cards() - _num_conc_refined_cards;
135
136 _num_processed_buf_mutator = other->num_processed_buf_mutator() - _num_processed_buf_mutator;
137 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads() - _num_processed_buf_rs_threads;
138
139 _num_coarsenings = other->num_coarsenings() - _num_coarsenings;
140
141 for (uint i = 0; i < _num_vtimes; i++) {
142 set_rs_thread_vtime(i, other->rs_thread_vtime(i) - rs_thread_vtime(i));
143 }
144
145 _sampling_thread_vtime = other->sampling_thread_vtime() - _sampling_thread_vtime;
146 }
147
148 class RegionTypeCounter {
149 private:
150 const char* _name;
151
152 size_t _rs_mem_size;
153 size_t _cards_occupied;
154 size_t _amount;
155
156 size_t _code_root_mem_size;
157 size_t _code_root_elems;
158
159 double rs_mem_size_percent_of(size_t total) {
160 return percent_of(_rs_mem_size, total);
161 }
162
163 double cards_occupied_percent_of(size_t total) {
164 return percent_of(_cards_occupied, total);
165 }
166
167 double code_root_mem_size_percent_of(size_t total) {
168 return percent_of(_code_root_mem_size, total);
169 }
170
171 double code_root_elems_percent_of(size_t total) {
172 return percent_of(_code_root_elems, total);
173 }
174
175 size_t amount() const { return _amount; }
176
177 public:
178
179 RegionTypeCounter(const char* name) : _name(name), _rs_mem_size(0), _cards_occupied(0),
180 _amount(0), _code_root_mem_size(0), _code_root_elems(0) { }
181
182 void add(size_t rs_mem_size, size_t cards_occupied, size_t code_root_mem_size,
183 size_t code_root_elems) {
184 _rs_mem_size += rs_mem_size;
185 _cards_occupied += cards_occupied;
186 _code_root_mem_size += code_root_mem_size;
187 _code_root_elems += code_root_elems;
188 _amount++;
189 }
190
191 size_t rs_mem_size() const { return _rs_mem_size; }
192 size_t cards_occupied() const { return _cards_occupied; }
193
194 size_t code_root_mem_size() const { return _code_root_mem_size; }
195 size_t code_root_elems() const { return _code_root_elems; }
196
197 void print_rs_mem_info_on(outputStream * out, size_t total) {
198 out->print_cr(" " SIZE_FORMAT_W(8) "%s (%5.1f%%) by " SIZE_FORMAT " %s regions",
199 byte_size_in_proper_unit(rs_mem_size()),
200 proper_unit_for_byte_size(rs_mem_size()),
201 rs_mem_size_percent_of(total), amount(), _name);
202 }
203
204 void print_cards_occupied_info_on(outputStream * out, size_t total) {
205 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) entries by " SIZE_FORMAT " %s regions",
206 cards_occupied(), cards_occupied_percent_of(total), amount(), _name);
207 }
208
209 void print_code_root_mem_info_on(outputStream * out, size_t total) {
210 out->print_cr(" " SIZE_FORMAT_W(8) "%s (%5.1f%%) by " SIZE_FORMAT " %s regions",
211 byte_size_in_proper_unit(code_root_mem_size()),
212 proper_unit_for_byte_size(code_root_mem_size()),
213 code_root_mem_size_percent_of(total), amount(), _name);
214 }
215
216 void print_code_root_elems_info_on(outputStream * out, size_t total) {
217 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) elements by " SIZE_FORMAT " %s regions",
218 code_root_elems(), code_root_elems_percent_of(total), amount(), _name);
219 }
220 };
221
222
223 class HRRSStatsIter: public HeapRegionClosure {
224 private:
225 RegionTypeCounter _young;
226 RegionTypeCounter _humongous;
227 RegionTypeCounter _free;
228 RegionTypeCounter _old;
229 RegionTypeCounter _archive;
230 RegionTypeCounter _all;
231
232 size_t _max_rs_mem_sz;
233 HeapRegion* _max_rs_mem_sz_region;
234
235 size_t total_rs_mem_sz() const { return _all.rs_mem_size(); }
236 size_t total_cards_occupied() const { return _all.cards_occupied(); }
237
238 size_t max_rs_mem_sz() const { return _max_rs_mem_sz; }
239 HeapRegion* max_rs_mem_sz_region() const { return _max_rs_mem_sz_region; }
240
241 size_t _max_code_root_mem_sz;
242 HeapRegion* _max_code_root_mem_sz_region;
243
244 size_t total_code_root_mem_sz() const { return _all.code_root_mem_size(); }
245 size_t total_code_root_elems() const { return _all.code_root_elems(); }
246
247 size_t max_code_root_mem_sz() const { return _max_code_root_mem_sz; }
248 HeapRegion* max_code_root_mem_sz_region() const { return _max_code_root_mem_sz_region; }
249
250 public:
251 HRRSStatsIter() : _young("Young"), _humongous("Humongous"),
252 _free("Free"), _old("Old"), _archive("Archive"), _all("All"),
253 _max_rs_mem_sz(0), _max_rs_mem_sz_region(NULL),
254 _max_code_root_mem_sz(0), _max_code_root_mem_sz_region(NULL)
255 {}
256
257 bool do_heap_region(HeapRegion* r) {
258 HeapRegionRemSet* hrrs = r->rem_set();
259
260 // HeapRegionRemSet::mem_size() includes the
261 // size of the strong code roots
262 size_t rs_mem_sz = hrrs->mem_size();
263 if (rs_mem_sz > _max_rs_mem_sz) {
264 _max_rs_mem_sz = rs_mem_sz;
265 _max_rs_mem_sz_region = r;
266 }
267 size_t occupied_cards = hrrs->occupied();
268 size_t code_root_mem_sz = hrrs->strong_code_roots_mem_size();
269 if (code_root_mem_sz > max_code_root_mem_sz()) {
270 _max_code_root_mem_sz = code_root_mem_sz;
271 _max_code_root_mem_sz_region = r;
272 }
273 size_t code_root_elems = hrrs->strong_code_roots_list_length();
274
275 RegionTypeCounter* current = NULL;
276 if (r->is_free()) {
277 current = &_free;
278 } else if (r->is_young()) {
279 current = &_young;
280 } else if (r->is_humongous()) {
281 current = &_humongous;
282 } else if (r->is_old()) {
283 current = &_old;
284 } else if (r->is_archive()) {
285 current = &_archive;
286 } else {
287 ShouldNotReachHere();
288 }
289 current->add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems);
290 _all.add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems);
291
292 return false;
293 }
294
295 void print_summary_on(outputStream* out) {
296 RegionTypeCounter* counters[] = { &_young, &_humongous, &_free, &_old, &_archive, NULL };
297
298 out->print_cr(" Current rem set statistics");
299 out->print_cr(" Total per region rem sets sizes = " SIZE_FORMAT "%s."
300 " Max = " SIZE_FORMAT "%s.",
301 byte_size_in_proper_unit(total_rs_mem_sz()),
302 proper_unit_for_byte_size(total_rs_mem_sz()),
303 byte_size_in_proper_unit(max_rs_mem_sz()),
304 proper_unit_for_byte_size(max_rs_mem_sz()));
305 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
306 (*current)->print_rs_mem_info_on(out, total_rs_mem_sz());
307 }
308
309 out->print_cr(" Static structures = " SIZE_FORMAT "%s,"
310 " free_lists = " SIZE_FORMAT "%s.",
311 byte_size_in_proper_unit(HeapRegionRemSet::static_mem_size()),
312 proper_unit_for_byte_size(HeapRegionRemSet::static_mem_size()),
313 byte_size_in_proper_unit(HeapRegionRemSet::fl_mem_size()),
314 proper_unit_for_byte_size(HeapRegionRemSet::fl_mem_size()));
315
316 out->print_cr(" " SIZE_FORMAT " occupied cards represented.",
317 total_cards_occupied());
318 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
319 (*current)->print_cards_occupied_info_on(out, total_cards_occupied());
320 }
321
322 // Largest sized rem set region statistics
323 HeapRegionRemSet* rem_set = max_rs_mem_sz_region()->rem_set();
324 out->print_cr(" Region with largest rem set = " HR_FORMAT ", "
325 "size = " SIZE_FORMAT "%s, occupied = " SIZE_FORMAT "%s.",
326 HR_FORMAT_PARAMS(max_rs_mem_sz_region()),
327 byte_size_in_proper_unit(rem_set->mem_size()),
328 proper_unit_for_byte_size(rem_set->mem_size()),
329 byte_size_in_proper_unit(rem_set->occupied()),
330 proper_unit_for_byte_size(rem_set->occupied()));
331 // Strong code root statistics
332 HeapRegionRemSet* max_code_root_rem_set = max_code_root_mem_sz_region()->rem_set();
333 out->print_cr(" Total heap region code root sets sizes = " SIZE_FORMAT "%s."
334 " Max = " SIZE_FORMAT "%s.",
335 byte_size_in_proper_unit(total_code_root_mem_sz()),
336 proper_unit_for_byte_size(total_code_root_mem_sz()),
337 byte_size_in_proper_unit(max_code_root_rem_set->strong_code_roots_mem_size()),
338 proper_unit_for_byte_size(max_code_root_rem_set->strong_code_roots_mem_size()));
339 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
340 (*current)->print_code_root_mem_info_on(out, total_code_root_mem_sz());
341 }
342
343 out->print_cr(" " SIZE_FORMAT " code roots represented.",
344 total_code_root_elems());
345 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
346 (*current)->print_code_root_elems_info_on(out, total_code_root_elems());
347 }
348
349 out->print_cr(" Region with largest amount of code roots = " HR_FORMAT ", "
350 "size = " SIZE_FORMAT "%s, num_elems = " SIZE_FORMAT ".",
351 HR_FORMAT_PARAMS(max_code_root_mem_sz_region()),
352 byte_size_in_proper_unit(max_code_root_rem_set->strong_code_roots_mem_size()),
353 proper_unit_for_byte_size(max_code_root_rem_set->strong_code_roots_mem_size()),
354 max_code_root_rem_set->strong_code_roots_list_length());
355 }
356 };
357
358 void G1RemSetSummary::print_on(outputStream* out) {
359 out->print_cr(" Recent concurrent refinement statistics");
360 out->print_cr(" Processed " SIZE_FORMAT " cards concurrently", num_conc_refined_cards());
361 out->print_cr(" Of " SIZE_FORMAT " completed buffers:", num_processed_buf_total());
362 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) by concurrent RS threads.",
363 num_processed_buf_total(),
364 percent_of(num_processed_buf_rs_threads(), num_processed_buf_total()));
365 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) by mutator threads.",
366 num_processed_buf_mutator(),
367 percent_of(num_processed_buf_mutator(), num_processed_buf_total()));
368 out->print_cr(" Did " SIZE_FORMAT " coarsenings.", num_coarsenings());
369 out->print_cr(" Concurrent RS threads times (s)");
370 out->print(" ");
371 for (uint i = 0; i < _num_vtimes; i++) {
372 out->print(" %5.2f", rs_thread_vtime(i));
373 }
374 out->cr();
375 out->print_cr(" Concurrent sampling threads times (s)");
376 out->print_cr(" %5.2f", sampling_thread_vtime());
377
378 HRRSStatsIter blk;
379 G1CollectedHeap::heap()->heap_region_iterate(&blk);
380 blk.print_summary_on(out);
381 }