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/os.hpp"
  35 #include "utilities/globalDefinitions.hpp"
  36 #include "utilities/ticks.hpp"
  37 
  38 #if INCLUDE_ALL_GCS
  39 #include "gc_implementation/g1/evacuationInfo.hpp"
  40 #endif
  41 
  42 #define assert_unset_gc_id() assert(_shared_gc_info.gc_id().is_undefined(), "GC already started?")
  43 #define assert_set_gc_id() assert(!_shared_gc_info.gc_id().is_undefined(), "GC not started?")
  44 
  45 void GCTracer::report_gc_start_impl(GCCause::Cause cause, const Ticks& timestamp) {
  46   assert_unset_gc_id();
  47 
  48   GCId gc_id = GCId::create();
  49   _shared_gc_info.set_gc_id(gc_id);
  50   _shared_gc_info.set_cause(cause);
  51   _shared_gc_info.set_start_timestamp(timestamp);
  52 }
  53 
  54 void GCTracer::report_gc_start(GCCause::Cause cause, const Ticks& timestamp) {
  55   assert_unset_gc_id();
  56 
  57   report_gc_start_impl(cause, timestamp);
  58 }
  59 
  60 bool GCTracer::has_reported_gc_start() const {
  61   return !_shared_gc_info.gc_id().is_undefined();
  62 }
  63 
  64 void GCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
  65   assert_set_gc_id();
  66 
  67   _shared_gc_info.set_sum_of_pauses(time_partitions->sum_of_pauses());
  68   _shared_gc_info.set_longest_pause(time_partitions->longest_pause());
  69   _shared_gc_info.set_end_timestamp(timestamp);
  70 
  71   send_phase_events(time_partitions);
  72   send_garbage_collection_event();
  73 }
  74 
  75 void GCTracer::report_gc_end(const Ticks& timestamp, TimePartitions* time_partitions) {
  76   assert_set_gc_id();
  77 
  78   report_gc_end_impl(timestamp, time_partitions);
  79 
  80   _shared_gc_info.set_gc_id(GCId::undefined());
  81 }
  82 
  83 void GCTracer::report_gc_reference_stats(const ReferenceProcessorStats& rps) const {
  84   assert_set_gc_id();
  85 
  86   send_reference_stats_event(REF_SOFT, rps.soft_count());
  87   send_reference_stats_event(REF_WEAK, rps.weak_count());
  88   send_reference_stats_event(REF_FINAL, rps.final_count());
  89   send_reference_stats_event(REF_PHANTOM, rps.phantom_count());
  90 }
  91 
  92 #if INCLUDE_SERVICES
  93 class ObjectCountEventSenderClosure : public KlassInfoClosure {
  94   const GCId _gc_id;
  95   const double _size_threshold_percentage;
  96   const size_t _total_size_in_words;
  97   const Ticks _timestamp;
  98 
  99  public:
 100   ObjectCountEventSenderClosure(GCId gc_id, size_t total_size_in_words, const Ticks& timestamp) :
 101     _gc_id(gc_id),
 102     _size_threshold_percentage(ObjectCountCutOffPercent / 100),
 103     _total_size_in_words(total_size_in_words),
 104     _timestamp(timestamp)
 105   {}
 106 
 107   virtual void do_cinfo(KlassInfoEntry* entry) {
 108     if (should_send_event(entry)) {
 109       ObjectCountEventSender::send(entry, _gc_id, _timestamp);
 110     }
 111   }
 112 
 113  private:
 114   bool should_send_event(const KlassInfoEntry* entry) const {
 115     double percentage_of_heap = ((double) entry->words()) / _total_size_in_words;
 116     return percentage_of_heap >= _size_threshold_percentage;
 117   }
 118 };
 119 
 120 void GCTracer::report_object_count_after_gc(BoolObjectClosure* is_alive_cl) {
 121   assert_set_gc_id();
 122   assert(is_alive_cl != NULL, "Must supply function to check liveness");
 123 
 124   if (ObjectCountEventSender::should_send_event()) {
 125     ResourceMark rm;
 126 
 127     KlassInfoTable cit(false);
 128     if (!cit.allocation_failed()) {
 129       HeapInspection hi(false, false, false, NULL);
 130       hi.populate_table(&cit, is_alive_cl);
 131       ObjectCountEventSenderClosure event_sender(_shared_gc_info.gc_id(), cit.size_of_instances_in_words(), Ticks::now());
 132       cit.iterate(&event_sender);
 133     }
 134   }
 135 }
 136 #endif // INCLUDE_SERVICES
 137 
 138 void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary) const {
 139   assert_set_gc_id();
 140 
 141   send_gc_heap_summary_event(when, heap_summary);
 142 }
 143 
 144 void GCTracer::report_metaspace_summary(GCWhen::Type when, const MetaspaceSummary& summary) const {
 145   assert_set_gc_id();
 146 
 147   send_meta_space_summary_event(when, summary);
 148 
 149   send_metaspace_chunk_free_list_summary(when, Metaspace::NonClassType, summary.metaspace_chunk_free_list_summary());
 150   if (UseCompressedClassPointers) {
 151     send_metaspace_chunk_free_list_summary(when, Metaspace::ClassType, summary.class_chunk_free_list_summary());
 152   }
 153 }
 154 
 155 void YoungGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
 156   assert_set_gc_id();
 157   assert(_tenuring_threshold != UNSET_TENURING_THRESHOLD, "Tenuring threshold has not been reported");
 158 
 159   GCTracer::report_gc_end_impl(timestamp, time_partitions);
 160   send_young_gc_event();
 161 
 162   _tenuring_threshold = UNSET_TENURING_THRESHOLD;
 163 }
 164 
 165 void YoungGCTracer::report_promotion_failed(const PromotionFailedInfo& pf_info) {
 166   assert_set_gc_id();
 167 
 168   send_promotion_failed_event(pf_info);
 169 }
 170 
 171 void YoungGCTracer::report_tenuring_threshold(const uint tenuring_threshold) {
 172   _tenuring_threshold = tenuring_threshold;
 173 }
 174 
 175 bool YoungGCTracer::should_report_promotion_events() const {
 176   return should_report_promotion_in_new_plab_event() ||
 177           should_report_promotion_outside_plab_event();
 178 }
 179 
 180 bool YoungGCTracer::should_report_promotion_in_new_plab_event() const {
 181   return should_send_promotion_in_new_plab_event();
 182 }
 183 
 184 bool YoungGCTracer::should_report_promotion_outside_plab_event() const {
 185   return should_send_promotion_outside_plab_event();
 186 }
 187 
 188 void YoungGCTracer::report_promotion_in_new_plab_event(Klass* klass, size_t obj_size,
 189                                                        uint age, bool tenured,
 190                                                        size_t plab_size) const {
 191   send_promotion_in_new_plab_event(klass, obj_size, age, tenured, plab_size);
 192 }
 193 
 194 void YoungGCTracer::report_promotion_outside_plab_event(Klass* klass, size_t obj_size,
 195                                                         uint age, bool tenured) const {
 196   send_promotion_outside_plab_event(klass, obj_size, age, tenured);
 197 }
 198 
 199 void OldGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
 200   assert_set_gc_id();
 201 
 202   GCTracer::report_gc_end_impl(timestamp, time_partitions);
 203   send_old_gc_event();
 204 }
 205 
 206 void ParallelOldTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
 207   assert_set_gc_id();
 208 
 209   OldGCTracer::report_gc_end_impl(timestamp, time_partitions);
 210   send_parallel_old_event();
 211 }
 212 
 213 void ParallelOldTracer::report_dense_prefix(void* dense_prefix) {
 214   assert_set_gc_id();
 215 
 216   _parallel_old_gc_info.report_dense_prefix(dense_prefix);
 217 }
 218 
 219 void OldGCTracer::report_concurrent_mode_failure() {
 220   assert_set_gc_id();
 221 
 222   send_concurrent_mode_failure_event();
 223 }
 224 
 225 #if INCLUDE_ALL_GCS
 226 void G1MMUTracer::report_mmu(double time_slice_sec, double gc_time_sec, double max_time_sec) {
 227   send_g1_mmu_event(time_slice_sec * MILLIUNITS,
 228                     gc_time_sec * MILLIUNITS,
 229                     max_time_sec * MILLIUNITS);
 230 }
 231 
 232 void G1NewTracer::report_yc_type(G1YCType type) {
 233   assert_set_gc_id();
 234 
 235   _g1_young_gc_info.set_type(type);
 236 }
 237 
 238 void G1NewTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
 239   assert_set_gc_id();
 240 
 241   YoungGCTracer::report_gc_end_impl(timestamp, time_partitions);
 242   send_g1_young_gc_event();
 243 }
 244 
 245 void G1NewTracer::report_evacuation_info(EvacuationInfo* info) {
 246   assert_set_gc_id();
 247 
 248   send_evacuation_info_event(info);
 249 }
 250 
 251 void G1NewTracer::report_evacuation_failed(EvacuationFailedInfo& ef_info) {
 252   assert_set_gc_id();
 253 
 254   send_evacuation_failed_event(ef_info);
 255   ef_info.reset();
 256 }
 257 #endif