1 /*
2 * Copyright (c) 2013, 2017, 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/concurrentG1Refine.hpp"
27 #include "gc/g1/concurrentG1RefineThread.hpp"
28 #include "gc/g1/g1CollectedHeap.inline.hpp"
29 #include "gc/g1/g1RemSet.inline.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 ConcurrentG1RefineThread* crt = (ConcurrentG1RefineThread*) t;
49 _summary->set_rs_thread_vtime(_counter, crt->vtime_accum());
50 _counter++;
51 }
52 };
53
54 G1RemSet* G1RemSetSummary::remset() const {
55 return G1CollectedHeap::heap()->g1_rem_set();
56 }
57
58 void G1RemSetSummary::update() {
59 _num_conc_refined_cards = remset()->num_conc_refined_cards();
60 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
61 _num_processed_buf_mutator = dcqs.processed_buffers_mut();
62 _num_processed_buf_rs_threads = dcqs.processed_buffers_rs_thread();
63
64 _num_coarsenings = HeapRegionRemSet::n_coarsenings();
65
66 ConcurrentG1Refine * cg1r = G1CollectedHeap::heap()->concurrent_g1_refine();
67 if (_rs_threads_vtimes != NULL) {
68 GetRSThreadVTimeClosure p(this);
69 cg1r->worker_threads_do(&p);
70 }
71 set_sampling_thread_vtime(cg1r->sampling_thread()->vtime_accum());
72 }
73
74 void G1RemSetSummary::set_rs_thread_vtime(uint thread, double value) {
75 assert(_rs_threads_vtimes != NULL, "just checking");
76 assert(thread < _num_vtimes, "just checking");
77 _rs_threads_vtimes[thread] = value;
78 }
79
80 double G1RemSetSummary::rs_thread_vtime(uint thread) const {
81 assert(_rs_threads_vtimes != NULL, "just checking");
82 assert(thread < _num_vtimes, "just checking");
83 return _rs_threads_vtimes[thread];
84 }
85
86 G1RemSetSummary::G1RemSetSummary() :
87 _num_conc_refined_cards(0),
88 _num_processed_buf_mutator(0),
89 _num_processed_buf_rs_threads(0),
90 _num_coarsenings(0),
91 _num_vtimes(ConcurrentG1Refine::thread_num()),
92 _rs_threads_vtimes(NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC)),
93 _sampling_thread_vtime(0.0f) {
94
95 memset(_rs_threads_vtimes, 0, sizeof(double) * _num_vtimes);
96 }
97
98 G1RemSetSummary::~G1RemSetSummary() {
99 if (_rs_threads_vtimes) {
100 FREE_C_HEAP_ARRAY(double, _rs_threads_vtimes);
101 }
102 }
103
104 void G1RemSetSummary::set(G1RemSetSummary* other) {
105 assert(other != NULL, "just checking");
106 assert(remset() == other->remset(), "just checking");
107 assert(_num_vtimes == other->_num_vtimes, "just checking");
108
109 _num_conc_refined_cards = other->num_conc_refined_cards();
110
111 _num_processed_buf_mutator = other->num_processed_buf_mutator();
112 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads();
113
114 _num_coarsenings = other->_num_coarsenings;
115
116 memcpy(_rs_threads_vtimes, other->_rs_threads_vtimes, sizeof(double) * _num_vtimes);
117
118 set_sampling_thread_vtime(other->sampling_thread_vtime());
119 }
120
121 void G1RemSetSummary::subtract_from(G1RemSetSummary* other) {
122 assert(other != NULL, "just checking");
123 assert(remset() == other->remset(), "just checking");
124 assert(_num_vtimes == other->_num_vtimes, "just checking");
125
126 _num_conc_refined_cards = other->num_conc_refined_cards() - _num_conc_refined_cards;
127
128 _num_processed_buf_mutator = other->num_processed_buf_mutator() - _num_processed_buf_mutator;
129 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads() - _num_processed_buf_rs_threads;
130
131 _num_coarsenings = other->num_coarsenings() - _num_coarsenings;
132
133 for (uint i = 0; i < _num_vtimes; i++) {
134 set_rs_thread_vtime(i, other->rs_thread_vtime(i) - rs_thread_vtime(i));
135 }
136
137 _sampling_thread_vtime = other->sampling_thread_vtime() - _sampling_thread_vtime;
138 }
139
140 class RegionTypeCounter VALUE_OBJ_CLASS_SPEC {
141 private:
142 const char* _name;
143
144 size_t _rs_mem_size;
145 size_t _cards_occupied;
146 size_t _amount;
147
148 size_t _code_root_mem_size;
149 size_t _code_root_elems;
150
151 double rs_mem_size_percent_of(size_t total) {
152 return percent_of(_rs_mem_size, total);
153 }
154
155 double cards_occupied_percent_of(size_t total) {
156 return percent_of(_cards_occupied, total);
157 }
158
159 double code_root_mem_size_percent_of(size_t total) {
160 return percent_of(_code_root_mem_size, total);
161 }
162
163 double code_root_elems_percent_of(size_t total) {
164 return percent_of(_code_root_elems, total);
165 }
166
167 size_t amount() const { return _amount; }
168
169 public:
170
171 RegionTypeCounter(const char* name) : _name(name), _rs_mem_size(0), _cards_occupied(0),
172 _amount(0), _code_root_mem_size(0), _code_root_elems(0) { }
173
174 void add(size_t rs_mem_size, size_t cards_occupied, size_t code_root_mem_size,
175 size_t code_root_elems) {
176 _rs_mem_size += rs_mem_size;
177 _cards_occupied += cards_occupied;
178 _code_root_mem_size += code_root_mem_size;
179 _code_root_elems += code_root_elems;
180 _amount++;
181 }
182
183 size_t rs_mem_size() const { return _rs_mem_size; }
184 size_t cards_occupied() const { return _cards_occupied; }
185
186 size_t code_root_mem_size() const { return _code_root_mem_size; }
187 size_t code_root_elems() const { return _code_root_elems; }
188
189 void print_rs_mem_info_on(outputStream * out, size_t total) {
190 out->print_cr(" " SIZE_FORMAT_W(8) "%s (%5.1f%%) by " SIZE_FORMAT " %s regions",
191 byte_size_in_proper_unit(rs_mem_size()),
192 proper_unit_for_byte_size(rs_mem_size()),
193 rs_mem_size_percent_of(total), amount(), _name);
194 }
195
196 void print_cards_occupied_info_on(outputStream * out, size_t total) {
197 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) entries by " SIZE_FORMAT " %s regions",
198 cards_occupied(), cards_occupied_percent_of(total), amount(), _name);
199 }
200
201 void print_code_root_mem_info_on(outputStream * out, size_t total) {
202 out->print_cr(" " SIZE_FORMAT_W(8) "%s (%5.1f%%) by " SIZE_FORMAT " %s regions",
203 byte_size_in_proper_unit(code_root_mem_size()),
204 proper_unit_for_byte_size(code_root_mem_size()),
205 code_root_mem_size_percent_of(total), amount(), _name);
206 }
207
208 void print_code_root_elems_info_on(outputStream * out, size_t total) {
209 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) elements by " SIZE_FORMAT " %s regions",
210 code_root_elems(), code_root_elems_percent_of(total), amount(), _name);
211 }
212 };
213
214
215 class HRRSStatsIter: public HeapRegionClosure {
216 private:
217 RegionTypeCounter _young;
218 RegionTypeCounter _humongous;
219 RegionTypeCounter _free;
220 RegionTypeCounter _old;
221 RegionTypeCounter _all;
222
223 size_t _max_rs_mem_sz;
224 HeapRegion* _max_rs_mem_sz_region;
225
226 size_t total_rs_mem_sz() const { return _all.rs_mem_size(); }
227 size_t total_cards_occupied() const { return _all.cards_occupied(); }
228
229 size_t max_rs_mem_sz() const { return _max_rs_mem_sz; }
230 HeapRegion* max_rs_mem_sz_region() const { return _max_rs_mem_sz_region; }
231
232 size_t _max_code_root_mem_sz;
233 HeapRegion* _max_code_root_mem_sz_region;
234
235 size_t total_code_root_mem_sz() const { return _all.code_root_mem_size(); }
236 size_t total_code_root_elems() const { return _all.code_root_elems(); }
237
238 size_t max_code_root_mem_sz() const { return _max_code_root_mem_sz; }
239 HeapRegion* max_code_root_mem_sz_region() const { return _max_code_root_mem_sz_region; }
240
241 public:
242 HRRSStatsIter() : _all("All"), _young("Young"), _humongous("Humongous"),
243 _free("Free"), _old("Old"), _max_code_root_mem_sz_region(NULL), _max_rs_mem_sz_region(NULL),
244 _max_rs_mem_sz(0), _max_code_root_mem_sz(0)
245 {}
246
247 bool doHeapRegion(HeapRegion* r) {
248 HeapRegionRemSet* hrrs = r->rem_set();
249
250 // HeapRegionRemSet::mem_size() includes the
251 // size of the strong code roots
252 size_t rs_mem_sz = hrrs->mem_size();
253 if (rs_mem_sz > _max_rs_mem_sz) {
254 _max_rs_mem_sz = rs_mem_sz;
255 _max_rs_mem_sz_region = r;
256 }
257 size_t occupied_cards = hrrs->occupied();
258 size_t code_root_mem_sz = hrrs->strong_code_roots_mem_size();
259 if (code_root_mem_sz > max_code_root_mem_sz()) {
260 _max_code_root_mem_sz = code_root_mem_sz;
261 _max_code_root_mem_sz_region = r;
262 }
263 size_t code_root_elems = hrrs->strong_code_roots_list_length();
264
265 RegionTypeCounter* current = NULL;
266 if (r->is_free()) {
267 current = &_free;
268 } else if (r->is_young()) {
269 current = &_young;
270 } else if (r->is_humongous()) {
271 current = &_humongous;
272 } else if (r->is_old()) {
273 current = &_old;
274 } else {
275 ShouldNotReachHere();
276 }
277 current->add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems);
278 _all.add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems);
279
280 return false;
281 }
282
283 void print_summary_on(outputStream* out) {
284 RegionTypeCounter* counters[] = { &_young, &_humongous, &_free, &_old, NULL };
285
286 out->print_cr(" Current rem set statistics");
287 out->print_cr(" Total per region rem sets sizes = " SIZE_FORMAT "%s."
288 " Max = " SIZE_FORMAT "%s.",
289 byte_size_in_proper_unit(total_rs_mem_sz()),
290 proper_unit_for_byte_size(total_rs_mem_sz()),
291 byte_size_in_proper_unit(max_rs_mem_sz()),
292 proper_unit_for_byte_size(max_rs_mem_sz()));
293 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
294 (*current)->print_rs_mem_info_on(out, total_rs_mem_sz());
295 }
296
297 out->print_cr(" Static structures = " SIZE_FORMAT "%s,"
298 " free_lists = " SIZE_FORMAT "%s.",
299 byte_size_in_proper_unit(HeapRegionRemSet::static_mem_size()),
300 proper_unit_for_byte_size(HeapRegionRemSet::static_mem_size()),
301 byte_size_in_proper_unit(HeapRegionRemSet::fl_mem_size()),
302 proper_unit_for_byte_size(HeapRegionRemSet::fl_mem_size()));
303
304 out->print_cr(" " SIZE_FORMAT " occupied cards represented.",
305 total_cards_occupied());
306 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
307 (*current)->print_cards_occupied_info_on(out, total_cards_occupied());
308 }
309
310 // Largest sized rem set region statistics
311 HeapRegionRemSet* rem_set = max_rs_mem_sz_region()->rem_set();
312 out->print_cr(" Region with largest rem set = " HR_FORMAT ", "
313 "size = " SIZE_FORMAT "%s, occupied = " SIZE_FORMAT "%s.",
314 HR_FORMAT_PARAMS(max_rs_mem_sz_region()),
315 byte_size_in_proper_unit(rem_set->mem_size()),
316 proper_unit_for_byte_size(rem_set->mem_size()),
317 byte_size_in_proper_unit(rem_set->occupied()),
318 proper_unit_for_byte_size(rem_set->occupied()));
319 // Strong code root statistics
320 HeapRegionRemSet* max_code_root_rem_set = max_code_root_mem_sz_region()->rem_set();
321 out->print_cr(" Total heap region code root sets sizes = " SIZE_FORMAT "%s."
322 " Max = " SIZE_FORMAT "%s.",
323 byte_size_in_proper_unit(total_code_root_mem_sz()),
324 proper_unit_for_byte_size(total_code_root_mem_sz()),
325 byte_size_in_proper_unit(max_code_root_rem_set->strong_code_roots_mem_size()),
326 proper_unit_for_byte_size(max_code_root_rem_set->strong_code_roots_mem_size()));
327 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
328 (*current)->print_code_root_mem_info_on(out, total_code_root_mem_sz());
329 }
330
331 out->print_cr(" " SIZE_FORMAT " code roots represented.",
332 total_code_root_elems());
333 for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
334 (*current)->print_code_root_elems_info_on(out, total_code_root_elems());
335 }
336
337 out->print_cr(" Region with largest amount of code roots = " HR_FORMAT ", "
338 "size = " SIZE_FORMAT "%s, num_elems = " SIZE_FORMAT ".",
339 HR_FORMAT_PARAMS(max_code_root_mem_sz_region()),
340 byte_size_in_proper_unit(max_code_root_rem_set->strong_code_roots_mem_size()),
341 proper_unit_for_byte_size(max_code_root_rem_set->strong_code_roots_mem_size()),
342 max_code_root_rem_set->strong_code_roots_list_length());
343 }
344 };
345
346 void G1RemSetSummary::print_on(outputStream* out) {
347 out->print_cr(" Recent concurrent refinement statistics");
348 out->print_cr(" Processed " SIZE_FORMAT " cards concurrently", num_conc_refined_cards());
349 out->print_cr(" Of " SIZE_FORMAT " completed buffers:", num_processed_buf_total());
350 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) by concurrent RS threads.",
351 num_processed_buf_total(),
352 percent_of(num_processed_buf_rs_threads(), num_processed_buf_total()));
353 out->print_cr(" " SIZE_FORMAT_W(8) " (%5.1f%%) by mutator threads.",
354 num_processed_buf_mutator(),
355 percent_of(num_processed_buf_mutator(), num_processed_buf_total()));
356 out->print_cr(" Did " SIZE_FORMAT " coarsenings.", num_coarsenings());
357 out->print_cr(" Concurrent RS threads times (s)");
358 out->print(" ");
359 for (uint i = 0; i < _num_vtimes; i++) {
360 out->print(" %5.2f", rs_thread_vtime(i));
361 }
362 out->cr();
363 out->print_cr(" Concurrent sampling threads times (s)");
364 out->print_cr(" %5.2f", sampling_thread_vtime());
365
366 HRRSStatsIter blk;
367 G1CollectedHeap::heap()->heap_region_iterate(&blk);
368 blk.print_summary_on(out);
369 }