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 { 143 assert_set_gc_id(); 144 145 send_gc_heap_summary_event(when, heap_summary); 146 } 147 148 void GCTracer::report_metaspace_summary(GCWhen::Type when, const MetaspaceSummary& summary) const { 149 assert_set_gc_id(); 150 151 send_meta_space_summary_event(when, summary); 152 153 send_metaspace_chunk_free_list_summary(when, Metaspace::NonClassType, summary.metaspace_chunk_free_list_summary()); 154 if (UseCompressedClassPointers) { 155 send_metaspace_chunk_free_list_summary(when, Metaspace::ClassType, summary.class_chunk_free_list_summary()); 156 } 157 } 158 159 void YoungGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 160 assert_set_gc_id(); 161 assert(_tenuring_threshold != UNSET_TENURING_THRESHOLD, "Tenuring threshold has not been reported"); 162 163 GCTracer::report_gc_end_impl(timestamp, time_partitions); 164 send_young_gc_event(); 165 166 _tenuring_threshold = UNSET_TENURING_THRESHOLD; 167 } 168 169 void YoungGCTracer::report_promotion_failed(const PromotionFailedInfo& pf_info) { 170 assert_set_gc_id(); 171 172 send_promotion_failed_event(pf_info); 173 } 174 175 void YoungGCTracer::report_tenuring_threshold(const uint tenuring_threshold) { 176 _tenuring_threshold = tenuring_threshold; 177 } 178 179 void OldGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 180 assert_set_gc_id(); 181 182 GCTracer::report_gc_end_impl(timestamp, time_partitions); 183 send_old_gc_event(); 184 } 185 186 void ParallelOldTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 187 assert_set_gc_id(); 188 189 OldGCTracer::report_gc_end_impl(timestamp, time_partitions); 190 send_parallel_old_event(); 191 } 192 193 void ParallelOldTracer::report_dense_prefix(void* dense_prefix) { 194 assert_set_gc_id(); 195 196 _parallel_old_gc_info.report_dense_prefix(dense_prefix); 197 } 198 199 void OldGCTracer::report_concurrent_mode_failure() { 200 assert_set_gc_id(); 201 202 send_concurrent_mode_failure_event(); 203 } 204 205 #if INCLUDE_ALL_GCS 206 void G1NewTracer::report_yc_type(G1YCType type) { 207 assert_set_gc_id(); 208 209 _g1_young_gc_info.set_type(type); 210 } 211 212 void G1NewTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) { 213 assert_set_gc_id(); 214 215 YoungGCTracer::report_gc_end_impl(timestamp, time_partitions); 216 send_g1_young_gc_event(); 217 } 218 219 void G1NewTracer::report_evacuation_info(EvacuationInfo* info) { 220 assert_set_gc_id(); 221 222 send_evacuation_info_event(info); 223 } 224 225 void G1NewTracer::report_evacuation_failed(EvacuationFailedInfo& ef_info) { 226 assert_set_gc_id(); 227 228 send_evacuation_failed_event(ef_info); 229 ef_info.reset(); 230 } 231 #endif