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/gcId.hpp" 29 #include "gc_implementation/shared/gcTimer.hpp" 30 #include "gc_implementation/shared/gcTrace.hpp" 31 #include "gc_implementation/shared/objectCountEventSender.hpp" 32 #include "memory/heapInspection.hpp" 33 #include "memory/referenceProcessorStats.hpp" 34 #include "runtime/handles.hpp" 35 #include "runtime/os.hpp" 36 #include "utilities/globalDefinitions.hpp" 37 #include "utilities/ticks.inline.hpp" 38 #include "trace/tracing.hpp" 39 40 #if INCLUDE_ALL_GCS 41 #include "gc_implementation/g1/evacuationInfo.hpp" 42 #endif 43 44 #define assert_unset_gc_id() assert(_shared_gc_info.gc_id().is_undefined(), "GC already started?") 45 #define assert_set_gc_id() assert(!_shared_gc_info.gc_id().is_undefined(), "GC not started?") 46 47 void GCTracer::report_gc_start_impl(GCCause::Cause cause, const Ticks& timestamp) { 48 assert_unset_gc_id(); 49 50 GCId gc_id = GCId::create(); 51 _shared_gc_info.set_gc_id(gc_id); 52 _shared_gc_info.set_cause(cause); 53 _shared_gc_info.set_start_timestamp(timestamp); 54 } 55 56 void GCTracer::report_gc_start(GCCause::Cause cause, const Ticks& timestamp) { 57 assert_unset_gc_id(); 58 59 report_gc_start_impl(cause, timestamp); 60 } 61 62 bool GCTracer::has_reported_gc_start() const { 63 return !_shared_gc_info.gc_id().is_undefined(); 64 } 65 66 void GCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 67 assert_set_gc_id(); 68 69 _shared_gc_info.set_sum_of_pauses(time_partitions->sum_of_pauses()); 70 _shared_gc_info.set_longest_pause(time_partitions->longest_pause()); 71 _shared_gc_info.set_end_timestamp(timestamp); 72 73 send_phase_events(time_partitions); 74 send_garbage_collection_event(); 75 } 76 77 void GCTracer::report_gc_end(const Ticks& timestamp, TimePartitions* time_partitions) { 78 assert_set_gc_id(); 79 80 report_gc_end_impl(timestamp, time_partitions); 81 82 _shared_gc_info.set_gc_id(GCId::undefined()); 83 } 84 85 void GCTracer::report_gc_reference_stats(const ReferenceProcessorStats& rps) const { 86 assert_set_gc_id(); 87 88 send_reference_stats_event(REF_SOFT, rps.soft_count()); 89 send_reference_stats_event(REF_WEAK, rps.weak_count()); 90 send_reference_stats_event(REF_FINAL, rps.final_count()); 91 send_reference_stats_event(REF_PHANTOM, rps.phantom_count()); 92 } 93 94 #if INCLUDE_SERVICES 95 class ObjectCountEventSenderClosure : public KlassInfoClosure { 96 const GCId _gc_id; 97 const double _size_threshold_percentage; 98 const size_t _total_size_in_words; 99 const Ticks _timestamp; 100 101 public: 102 ObjectCountEventSenderClosure(GCId gc_id, size_t total_size_in_words, const Ticks& timestamp) : 103 _gc_id(gc_id), 104 _size_threshold_percentage(ObjectCountCutOffPercent / 100), 105 _total_size_in_words(total_size_in_words), 106 _timestamp(timestamp) 107 {} 108 109 virtual void do_cinfo(KlassInfoEntry* entry) { 110 if (should_send_event(entry)) { 111 ObjectCountEventSender::send(entry, _gc_id, _timestamp); 112 } 113 } 114 115 private: 116 bool should_send_event(const KlassInfoEntry* entry) const { 117 double percentage_of_heap = ((double) entry->words()) / _total_size_in_words; 118 return percentage_of_heap >= _size_threshold_percentage; 119 } 120 }; 121 122 void GCTracer::report_object_count_after_gc(BoolObjectClosure* is_alive_cl) { 123 assert_set_gc_id(); 124 assert(is_alive_cl != NULL, "Must supply function to check liveness"); 125 126 if (ObjectCountEventSender::should_send_event()) { 127 ResourceMark rm; 128 129 KlassInfoTable cit(false); 130 if (!cit.allocation_failed()) { 131 HeapInspection hi(false, false, false, NULL); 132 hi.populate_table(&cit, is_alive_cl); 133 ObjectCountEventSenderClosure event_sender(_shared_gc_info.gc_id(), cit.size_of_instances_in_words(), Ticks::now()); 134 cit.iterate(&event_sender); 135 } 136 } 137 } 138 #endif // INCLUDE_SERVICES 139 140 void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary) const { 141 assert_set_gc_id(); 142 143 send_gc_heap_summary_event(when, heap_summary); 144 } 145 146 void GCTracer::report_metaspace_summary(GCWhen::Type when, const MetaspaceSummary& summary) const { 147 assert_set_gc_id(); 148 149 send_meta_space_summary_event(when, summary); 150 151 send_metaspace_chunk_free_list_summary(when, Metaspace::NonClassType, summary.metaspace_chunk_free_list_summary()); 152 if (UseCompressedClassPointers) { 153 send_metaspace_chunk_free_list_summary(when, Metaspace::ClassType, summary.class_chunk_free_list_summary()); 154 } 155 } 156 157 void YoungGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 158 assert_set_gc_id(); 159 assert(_tenuring_threshold != UNSET_TENURING_THRESHOLD, "Tenuring threshold has not been reported"); 160 161 GCTracer::report_gc_end_impl(timestamp, time_partitions); 162 send_young_gc_event(); 163 164 _tenuring_threshold = UNSET_TENURING_THRESHOLD; 165 } 166 167 void YoungGCTracer::report_promotion_failed(const PromotionFailedInfo& pf_info) { 168 assert_set_gc_id(); 169 170 send_promotion_failed_event(pf_info); 171 } 172 173 void YoungGCTracer::report_tenuring_threshold(const uint tenuring_threshold) { 174 _tenuring_threshold = tenuring_threshold; 175 } 176 177 void YoungGCTracer::report_promotion_to_new_plab(oop const old, uint age, bool tenured, size_t plab_size) { 178 179 EventPromotionSample event; 180 181 if (event.should_commit()) { 182 event.set_gcId(_shared_gc_info.gc_id().id()); 183 event.set_class(KlassHandle(old->klass())()); 184 event.set_objectSize((size_t)old->size()); 185 event.set_tenured(tenured); 186 event.set_tenuringAge(age); 187 188 // If the PLAB size is the same as the object size the copy was done directly 189 // to the heap instead of allocating a new PLAB to copy the object to 190 if ((size_t)old->size() == plab_size) { 191 event.set_directAllocation(true); 192 // Set plabSize to 0 as it otherwise will be a random value 193 event.set_plabSize(0); 194 } else { 195 event.set_directAllocation(false); 196 event.set_plabSize(plab_size); 197 } 198 199 event.commit(); 200 } 201 } 202 203 void OldGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 204 assert_set_gc_id(); 205 206 GCTracer::report_gc_end_impl(timestamp, time_partitions); 207 send_old_gc_event(); 208 } 209 210 void ParallelOldTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 211 assert_set_gc_id(); 212 213 OldGCTracer::report_gc_end_impl(timestamp, time_partitions); 214 send_parallel_old_event(); 215 } 216 217 void ParallelOldTracer::report_dense_prefix(void* dense_prefix) { 218 assert_set_gc_id(); 219 220 _parallel_old_gc_info.report_dense_prefix(dense_prefix); 221 } 222 223 void OldGCTracer::report_concurrent_mode_failure() { 224 assert_set_gc_id(); 225 226 send_concurrent_mode_failure_event(); 227 } 228 229 #if INCLUDE_ALL_GCS 230 void G1NewTracer::report_yc_type(G1YCType type) { 231 assert_set_gc_id(); 232 233 _g1_young_gc_info.set_type(type); 234 } 235 236 void G1NewTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 237 assert_set_gc_id(); 238 239 YoungGCTracer::report_gc_end_impl(timestamp, time_partitions); 240 send_g1_young_gc_event(); 241 } 242 243 void G1NewTracer::report_evacuation_info(EvacuationInfo* info) { 244 assert_set_gc_id(); 245 246 send_evacuation_info_event(info); 247 } 248 249 void G1NewTracer::report_evacuation_failed(EvacuationFailedInfo& ef_info) { 250 assert_set_gc_id(); 251 252 send_evacuation_failed_event(ef_info); 253 ef_info.reset(); 254 } 255 #endif