1 /*
2 * Copyright (c) 2012, 2013, 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_implementation/shared/copyFailedInfo.hpp"
27 #include "gc_implementation/shared/gcHeapSummary.hpp"
28 #include "gc_implementation/shared/gcTimer.hpp"
29 #include "gc_implementation/shared/gcTrace.hpp"
30 #include "gc_implementation/shared/objectCountEventSender.hpp"
31 #include "memory/heapInspection.hpp"
32 #include "memory/referenceProcessorStats.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/globalDefinitions.hpp"
35 #include "utilities/ticks.inline.hpp"
36
37 #if INCLUDE_ALL_GCS
38 #include "gc_implementation/g1/evacuationInfo.hpp"
39 #endif
40
41 #define assert_unset_gc_id() assert(_shared_gc_info.id() == SharedGCInfo::UNSET_GCID, "GC already started?")
42 #define assert_set_gc_id() assert(_shared_gc_info.id() != SharedGCInfo::UNSET_GCID, "GC not started?")
43
44 static GCId GCTracer_next_gc_id = 0;
45 static GCId create_new_gc_id() {
46 return GCTracer_next_gc_id++;
47 }
48
49 void GCTracer::report_gc_start_impl(GCCause::Cause cause, const Ticks& timestamp) {
50 assert_unset_gc_id();
51
52 GCId gc_id = create_new_gc_id();
53 _shared_gc_info.set_id(gc_id);
54 _shared_gc_info.set_cause(cause);
55 _shared_gc_info.set_start_timestamp(timestamp);
56 }
57
58 void GCTracer::report_gc_start(GCCause::Cause cause, const Ticks& timestamp) {
59 assert_unset_gc_id();
60
61 report_gc_start_impl(cause, timestamp);
62 }
63
64 bool GCTracer::has_reported_gc_start() const {
65 return _shared_gc_info.id() != SharedGCInfo::UNSET_GCID;
66 }
67
68 void GCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
69 assert_set_gc_id();
70
71 _shared_gc_info.set_sum_of_pauses(time_partitions->sum_of_pauses());
72 _shared_gc_info.set_longest_pause(time_partitions->longest_pause());
73 _shared_gc_info.set_end_timestamp(timestamp);
74
75 send_phase_events(time_partitions);
76 send_garbage_collection_event();
77 }
78
79 void GCTracer::report_gc_end(const Ticks& timestamp, TimePartitions* time_partitions) {
80 assert_set_gc_id();
81
82 report_gc_end_impl(timestamp, time_partitions);
83
84 _shared_gc_info.set_id(SharedGCInfo::UNSET_GCID);
85 }
86
87 void GCTracer::report_gc_reference_stats(const ReferenceProcessorStats& rps) const {
88 assert_set_gc_id();
89
90 send_reference_stats_event(REF_SOFT, rps.soft_count());
91 send_reference_stats_event(REF_WEAK, rps.weak_count());
92 send_reference_stats_event(REF_FINAL, rps.final_count());
93 send_reference_stats_event(REF_PHANTOM, rps.phantom_count());
94 }
95
96 #if INCLUDE_SERVICES
97 class ObjectCountEventSenderClosure : public KlassInfoClosure {
98 const GCId _gc_id;
99 const double _size_threshold_percentage;
100 const size_t _total_size_in_words;
101 const Ticks _timestamp;
102
103 public:
104 ObjectCountEventSenderClosure(GCId gc_id, size_t total_size_in_words, const Ticks& timestamp) :
105 _gc_id(gc_id),
106 _size_threshold_percentage(ObjectCountCutOffPercent / 100),
107 _total_size_in_words(total_size_in_words),
108 _timestamp(timestamp)
109 {}
110
111 virtual void do_cinfo(KlassInfoEntry* entry) {
112 if (should_send_event(entry)) {
113 ObjectCountEventSender::send(entry, _gc_id, _timestamp);
114 }
115 }
116
117 private:
118 bool should_send_event(const KlassInfoEntry* entry) const {
119 double percentage_of_heap = ((double) entry->words()) / _total_size_in_words;
120 return percentage_of_heap >= _size_threshold_percentage;
121 }
122 };
123
124 void GCTracer::report_object_count_after_gc(BoolObjectClosure* is_alive_cl) {
125 assert_set_gc_id();
126 assert(is_alive_cl != NULL, "Must supply function to check liveness");
127
128 if (ObjectCountEventSender::should_send_event()) {
129 ResourceMark rm;
130
131 KlassInfoTable cit(false);
132 if (!cit.allocation_failed()) {
133 HeapInspection hi(false, false, false, NULL);
134 hi.populate_table(&cit, is_alive_cl);
135 ObjectCountEventSenderClosure event_sender(_shared_gc_info.id(), cit.size_of_instances_in_words(), Ticks::now());
136 cit.iterate(&event_sender);
137 }
138 }
139 }
140 #endif // INCLUDE_SERVICES
141
142 void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary, const MetaspaceSummary& meta_space_summary) const {
143 assert_set_gc_id();
144
145 send_gc_heap_summary_event(when, heap_summary);
146 send_meta_space_summary_event(when, meta_space_summary);
147 }
148
149 void YoungGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
150 assert_set_gc_id();
151 assert(_tenuring_threshold != UNSET_TENURING_THRESHOLD, "Tenuring threshold has not been reported");
152
153 GCTracer::report_gc_end_impl(timestamp, time_partitions);
154 send_young_gc_event();
155
156 _tenuring_threshold = UNSET_TENURING_THRESHOLD;
157 }
158
159 void YoungGCTracer::report_promotion_failed(const PromotionFailedInfo& pf_info) {
160 assert_set_gc_id();
161
162 send_promotion_failed_event(pf_info);
163 }
164
165 void YoungGCTracer::report_tenuring_threshold(const uint tenuring_threshold) {
166 _tenuring_threshold = tenuring_threshold;
167 }
168
169 void OldGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
170 assert_set_gc_id();
171
172 GCTracer::report_gc_end_impl(timestamp, time_partitions);
173 send_old_gc_event();
174 }
175
176 void ParallelOldTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
177 assert_set_gc_id();
178
179 OldGCTracer::report_gc_end_impl(timestamp, time_partitions);
180 send_parallel_old_event();
181 }
182
183 void ParallelOldTracer::report_dense_prefix(void* dense_prefix) {
184 assert_set_gc_id();
185
186 _parallel_old_gc_info.report_dense_prefix(dense_prefix);
187 }
188
189 void OldGCTracer::report_concurrent_mode_failure() {
190 assert_set_gc_id();
191
192 send_concurrent_mode_failure_event();
193 }
194
195 #if INCLUDE_ALL_GCS
196 void G1NewTracer::report_yc_type(G1YCType type) {
197 assert_set_gc_id();
198
199 _g1_young_gc_info.set_type(type);
200 }
201
202 void G1NewTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
203 assert_set_gc_id();
204
205 YoungGCTracer::report_gc_end_impl(timestamp, time_partitions);
206 send_g1_young_gc_event();
207 }
208
209 void G1NewTracer::report_evacuation_info(EvacuationInfo* info) {
210 assert_set_gc_id();
211
212 send_evacuation_info_event(info);
213 }
214
215 void G1NewTracer::report_evacuation_failed(EvacuationFailedInfo& ef_info) {
216 assert_set_gc_id();
217
218 send_evacuation_failed_event(ef_info);
219 ef_info.reset();
220 }
221 #endif