1 /* 2 * Copyright Amazon.com Inc. 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 #include "precompiled.hpp" 25 26 #include "gc/shenandoah/shenandoahAgeCensus.hpp" 27 #include "gc/shenandoah/shenandoahHeap.inline.hpp" 28 #include "gc/shenandoah/shenandoahEvacTracker.hpp" 29 #include "gc/shenandoah/shenandoahThreadLocalData.hpp" 30 #include "gc/shenandoah/shenandoahRootProcessor.hpp" 31 #include "runtime/threadSMR.inline.hpp" 32 #include "runtime/thread.hpp" 33 34 ShenandoahEvacuationStats::ShenandoahEvacuationStats(bool generational) 35 : _evacuations_completed(0), _bytes_completed(0), 36 _evacuations_attempted(0), _bytes_attempted(0), 37 _use_age_table(generational && (ShenandoahGenerationalCensusAtEvac || !ShenandoahGenerationalAdaptiveTenuring)) { 38 if (_use_age_table) { 39 _age_table = new AgeTable(false); 40 } 41 } 42 43 AgeTable* ShenandoahEvacuationStats::age_table() const { 44 assert(_use_age_table, "Don't call"); 45 return _age_table; 46 } 47 48 void ShenandoahEvacuationStats::begin_evacuation(size_t bytes) { 49 ++_evacuations_attempted; 50 _bytes_attempted += bytes; 51 } 52 53 void ShenandoahEvacuationStats::end_evacuation(size_t bytes) { 54 ++_evacuations_completed; 55 _bytes_completed += bytes; 56 } 57 58 void ShenandoahEvacuationStats::record_age(size_t bytes, uint age) { 59 assert(_use_age_table, "Don't call!"); 60 _age_table->add(age, bytes >> LogBytesPerWord); 61 } 62 63 void ShenandoahEvacuationStats::accumulate(const ShenandoahEvacuationStats* other) { 64 _evacuations_completed += other->_evacuations_completed; 65 _bytes_completed += other->_bytes_completed; 66 _evacuations_attempted += other->_evacuations_attempted; 67 _bytes_attempted += other->_bytes_attempted; 68 if (_use_age_table) { 69 _age_table->merge(other->age_table()); 70 } 71 } 72 73 void ShenandoahEvacuationStats::reset() { 74 _evacuations_completed = _evacuations_attempted = 0; 75 _bytes_completed = _bytes_attempted = 0; 76 if (_use_age_table) { 77 _age_table->clear(); 78 } 79 } 80 81 void ShenandoahEvacuationStats::print_on(outputStream* st) { 82 size_t abandoned_size = _bytes_attempted - _bytes_completed; 83 size_t abandoned_count = _evacuations_attempted - _evacuations_completed; 84 st->print_cr("Evacuated " SIZE_FORMAT "%s across " SIZE_FORMAT " objects, " 85 "abandoned " SIZE_FORMAT "%s across " SIZE_FORMAT " objects.", 86 byte_size_in_proper_unit(_bytes_completed), proper_unit_for_byte_size(_bytes_completed), 87 _evacuations_completed, 88 byte_size_in_proper_unit(abandoned_size), proper_unit_for_byte_size(abandoned_size), 89 abandoned_count); 90 if (_use_age_table) { 91 _age_table->print_on(st, ShenandoahHeap::heap()->age_census()->tenuring_threshold()); 92 } 93 } 94 95 void ShenandoahEvacuationTracker::print_global_on(outputStream* st) { 96 print_evacuations_on(st, &_workers_global, &_mutators_global); 97 } 98 99 void ShenandoahEvacuationTracker::print_evacuations_on(outputStream* st, 100 ShenandoahEvacuationStats* workers, 101 ShenandoahEvacuationStats* mutators) { 102 st->print("Workers: "); 103 workers->print_on(st); 104 st->cr(); 105 st->print("Mutators: "); 106 mutators->print_on(st); 107 st->cr(); 108 109 ShenandoahHeap* heap = ShenandoahHeap::heap(); 110 if (_generational) { 111 AgeTable young_region_ages(false); 112 for (uint i = 0; i < heap->num_regions(); ++i) { 113 ShenandoahHeapRegion* r = heap->get_region(i); 114 if (r->is_young()) { 115 young_region_ages.add(r->age(), r->get_live_data_words()); 116 } 117 } 118 uint tenuring_threshold = heap->age_census()->tenuring_threshold(); 119 st->print("Young regions: "); 120 young_region_ages.print_on(st, tenuring_threshold); 121 st->cr(); 122 } 123 } 124 125 class ShenandoahStatAggregator : public ThreadClosure { 126 public: 127 ShenandoahEvacuationStats* _target; 128 explicit ShenandoahStatAggregator(ShenandoahEvacuationStats* target) : _target(target) {} 129 virtual void do_thread(Thread* thread) override { 130 ShenandoahEvacuationStats* local = ShenandoahThreadLocalData::evacuation_stats(thread); 131 _target->accumulate(local); 132 local->reset(); 133 } 134 }; 135 136 ShenandoahCycleStats ShenandoahEvacuationTracker::flush_cycle_to_global() { 137 ShenandoahEvacuationStats mutators(_generational), workers(_generational); 138 139 ThreadsListHandle java_threads_iterator; 140 ShenandoahStatAggregator aggregate_mutators(&mutators); 141 java_threads_iterator.list()->threads_do(&aggregate_mutators); 142 143 ShenandoahStatAggregator aggregate_workers(&workers); 144 ShenandoahHeap::heap()->gc_threads_do(&aggregate_workers); 145 146 _mutators_global.accumulate(&mutators); 147 _workers_global.accumulate(&workers); 148 149 if (_generational && (ShenandoahGenerationalCensusAtEvac || !ShenandoahGenerationalAdaptiveTenuring)) { 150 // Ingest population vectors into the heap's global census 151 // data, and use it to compute an appropriate tenuring threshold 152 // for use in the next cycle. 153 ShenandoahAgeCensus* census = ShenandoahHeap::heap()->age_census(); 154 census->prepare_for_census_update(); 155 // The first argument is used for any age 0 cohort population that we may otherwise have 156 // missed during the census. This is non-zero only when census happens at marking. 157 census->update_census(0, _mutators_global.age_table(), _workers_global.age_table()); 158 } 159 160 return {workers, mutators}; 161 } 162 163 void ShenandoahEvacuationTracker::begin_evacuation(Thread* thread, size_t bytes) { 164 ShenandoahThreadLocalData::begin_evacuation(thread, bytes); 165 } 166 167 void ShenandoahEvacuationTracker::end_evacuation(Thread* thread, size_t bytes) { 168 ShenandoahThreadLocalData::end_evacuation(thread, bytes); 169 } 170 171 void ShenandoahEvacuationTracker::record_age(Thread* thread, size_t bytes, uint age) { 172 ShenandoahThreadLocalData::record_age(thread, bytes, age); 173 }