1 /*

     2  * Copyright (c) 2012, 2015, 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/shared/copyFailedInfo.hpp"

    27 #include "gc/shared/gcHeapSummary.hpp"

    28 #include "gc/shared/gcId.hpp"

    29 #include "gc/shared/gcTimer.hpp"

    30 #include "gc/shared/gcTrace.hpp"

    31 #include "gc/shared/objectCountEventSender.hpp"

    32 #include "gc/shared/referenceProcessorStats.hpp"

    33 #include "memory/heapInspection.hpp"

    34 #include "memory/resourceArea.hpp"

    35 #include "runtime/os.hpp"

    36 #include "utilities/globalDefinitions.hpp"

    37 #include "utilities/macros.hpp"

    38 #include "utilities/ticks.inline.hpp"

    39 #if INCLUDE_ALL_GCS

    40 #include "gc/g1/evacuationInfo.hpp"

    41 #endif

    42 

    43 #define assert_unset_gc_id() assert(_shared_gc_info.gc_id().is_undefined(), "GC already started?")

    44 #define assert_set_gc_id() assert(!_shared_gc_info.gc_id().is_undefined(), "GC not started?")

    45 

    46 void GCTracer::report_gc_start_impl(GCCause::Cause cause, const Ticks& timestamp) {

    47   assert_unset_gc_id();

    48 

    49   GCId gc_id = GCId::create();

    50   _shared_gc_info.set_gc_id(gc_id);

    51   _shared_gc_info.set_cause(cause);

    52   _shared_gc_info.set_start_timestamp(timestamp);

    53 }

    54 

    55 void GCTracer::report_gc_start(GCCause::Cause cause, const Ticks& timestamp) {

    56   assert_unset_gc_id();

    57 

    58   report_gc_start_impl(cause, timestamp);

    59 }

    60 

    61 bool GCTracer::has_reported_gc_start() const {

    62   return !_shared_gc_info.gc_id().is_undefined();

    63 }

    64 

    65 void GCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {

    66   assert_set_gc_id();

    67 

    68   _shared_gc_info.set_sum_of_pauses(time_partitions->sum_of_pauses());

    69   _shared_gc_info.set_longest_pause(time_partitions->longest_pause());

    70   _shared_gc_info.set_end_timestamp(timestamp);

    71 

    72   send_phase_events(time_partitions);

    73   send_garbage_collection_event();

    74 }

    75 

    76 void GCTracer::report_gc_end(const Ticks& timestamp, TimePartitions* time_partitions) {

    77   assert_set_gc_id();

    78 

    79   report_gc_end_impl(timestamp, time_partitions);

    80 

    81   _shared_gc_info.set_gc_id(GCId::undefined());

    82 }

    83 

    84 void GCTracer::report_gc_reference_stats(const ReferenceProcessorStats& rps) const {

    85   assert_set_gc_id();

    86 

    87   send_reference_stats_event(REF_SOFT, rps.soft_count());

    88   send_reference_stats_event(REF_WEAK, rps.weak_count());

    89   send_reference_stats_event(REF_FINAL, rps.final_count());

    90   send_reference_stats_event(REF_PHANTOM, rps.phantom_count());

    91 }

    92 

    93 #if INCLUDE_SERVICES

    94 class ObjectCountEventSenderClosure : public KlassInfoClosure {

    95   const GCId _gc_id;

    96   const double _size_threshold_percentage;

    97   const size_t _total_size_in_words;

    98   const Ticks _timestamp;

    99 

   100  public:

   101   ObjectCountEventSenderClosure(GCId gc_id, size_t total_size_in_words, const Ticks& timestamp) :

   102     _gc_id(gc_id),

   103     _size_threshold_percentage(ObjectCountCutOffPercent / 100),

   104     _total_size_in_words(total_size_in_words),

   105     _timestamp(timestamp)

   106   {}

   107 

   108   virtual void do_cinfo(KlassInfoEntry* entry) {

   109     if (should_send_event(entry)) {

   110       ObjectCountEventSender::send(entry, _gc_id, _timestamp);

   111     }

   112   }

   113 

   114  private:

   115   bool should_send_event(const KlassInfoEntry* entry) const {

   116     double percentage_of_heap = ((double) entry->words()) / _total_size_in_words;

   117     return percentage_of_heap >= _size_threshold_percentage;

   118   }

   119 };

   120 

   121 void GCTracer::report_object_count_after_gc(BoolObjectClosure* is_alive_cl) {

   122   assert_set_gc_id();

   123   assert(is_alive_cl != NULL, "Must supply function to check liveness");

   124 

   125   if (ObjectCountEventSender::should_send_event()) {

   126     ResourceMark rm;

   127 

   128     KlassInfoTable cit(false);

   129     if (!cit.allocation_failed()) {

   130       HeapInspection hi(false, false, false, NULL);

   131       hi.populate_table(&cit, is_alive_cl);

   132       ObjectCountEventSenderClosure event_sender(_shared_gc_info.gc_id(), cit.size_of_instances_in_words(), Ticks::now());

   133       cit.iterate(&event_sender);

   134     }

   135   }

   136 }

   137 #endif // INCLUDE_SERVICES

   138 

   139 void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary) const {

   140   assert_set_gc_id();

   141 

   142   send_gc_heap_summary_event(when, heap_summary);

   143 }

   144 

   145 void GCTracer::report_metaspace_summary(GCWhen::Type when, const MetaspaceSummary& summary) const {

   146   assert_set_gc_id();

   147 

   148   send_meta_space_summary_event(when, summary);

   149 

   150   send_metaspace_chunk_free_list_summary(when, Metaspace::NonClassType, summary.metaspace_chunk_free_list_summary());

   151   if (UseCompressedClassPointers) {

   152     send_metaspace_chunk_free_list_summary(when, Metaspace::ClassType, summary.class_chunk_free_list_summary());

   153   }

   154 }

   155 

   156 void YoungGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {

   157   assert_set_gc_id();

   158   assert(_tenuring_threshold != UNSET_TENURING_THRESHOLD, "Tenuring threshold has not been reported");

   159 

   160   GCTracer::report_gc_end_impl(timestamp, time_partitions);

   161   send_young_gc_event();

   162 

   163   _tenuring_threshold = UNSET_TENURING_THRESHOLD;

   164 }

   165 

   166 void YoungGCTracer::report_promotion_failed(const PromotionFailedInfo& pf_info) const {

   167   assert_set_gc_id();

   168 

   169   send_promotion_failed_event(pf_info);

   170 }

   171 

   172 void YoungGCTracer::report_tenuring_threshold(const uint tenuring_threshold) {

   173   _tenuring_threshold = tenuring_threshold;

   174 }

   175 

   176 bool YoungGCTracer::should_report_promotion_in_new_plab_event() const {

   177   return should_send_promotion_in_new_plab_event();

   178 }

   179 

   180 bool YoungGCTracer::should_report_promotion_outside_plab_event() const {

   181   return should_send_promotion_outside_plab_event();

   182 }

   183 

   184 void YoungGCTracer::report_promotion_in_new_plab_event(Klass* klass, size_t obj_size,

   185                                                        uint age, bool tenured,

   186                                                        size_t plab_size) const {

   187   assert_set_gc_id();

   188   send_promotion_in_new_plab_event(klass, obj_size, age, tenured, plab_size);

   189 }

   190 

   191 void YoungGCTracer::report_promotion_outside_plab_event(Klass* klass, size_t obj_size,

   192                                                         uint age, bool tenured) const {

   193   assert_set_gc_id();

   194   send_promotion_outside_plab_event(klass, obj_size, age, tenured);

   195 }

   196 

   197 void OldGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {

   198   assert_set_gc_id();

   199 

   200   GCTracer::report_gc_end_impl(timestamp, time_partitions);

   201   send_old_gc_event();

   202 }

   203 

   204 void ParallelOldTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {

   205   assert_set_gc_id();

   206 

   207   OldGCTracer::report_gc_end_impl(timestamp, time_partitions);

   208   send_parallel_old_event();

   209 }

   210 

   211 void ParallelOldTracer::report_dense_prefix(void* dense_prefix) {

   212   assert_set_gc_id();

   213 

   214   _parallel_old_gc_info.report_dense_prefix(dense_prefix);

   215 }

   216 

   217 void OldGCTracer::report_concurrent_mode_failure() {

   218   assert_set_gc_id();

   219 

   220   send_concurrent_mode_failure_event();

   221 }

   222 

   223 #if INCLUDE_ALL_GCS

   224 void G1NewTracer::report_yc_type(G1YCType type) {

   225   assert_set_gc_id();

   226 

   227   _g1_young_gc_info.set_type(type);

   228 }

   229 

   230 void G1NewTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {

   231   assert_set_gc_id();

   232 

   233   YoungGCTracer::report_gc_end_impl(timestamp, time_partitions);

   234   send_g1_young_gc_event();

   235 }

   236 

   237 void G1NewTracer::report_evacuation_info(EvacuationInfo* info) {

   238   assert_set_gc_id();

   239 

   240   send_evacuation_info_event(info);

   241 }

   242 

   243 void G1NewTracer::report_evacuation_failed(EvacuationFailedInfo& ef_info) {

   244   assert_set_gc_id();

   245 

   246   send_evacuation_failed_event(ef_info);

   247   ef_info.reset();

   248 }

   249 #endif