1 /*
2 * Copyright (c) 2022, Amazon, Inc. 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/shenandoahHeap.inline.hpp"
27 #include "gc/shenandoah/shenandoahEvacTracker.hpp"
28 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
29 #include "gc/shenandoah/shenandoahRootProcessor.hpp"
30 #include "runtime/threadSMR.inline.hpp"
31 #include "runtime/thread.hpp"
32
33 ShenandoahEvacuationStats::ShenandoahEvacuationStats()
34 : _evacuations_completed(0), _bytes_completed(0),
35 _evacuations_attempted(0), _bytes_attempted(0),
36 _age_table(false) {}
37
38 void ShenandoahEvacuationStats::begin_evacuation(size_t bytes) {
39 ++_evacuations_attempted;
40 _bytes_attempted += bytes;
41 }
42
43 void ShenandoahEvacuationStats::end_evacuation(size_t bytes, uint age) {
44 ++_evacuations_completed;
45 _bytes_completed += bytes;
46 if (age > 0) {
47 _age_table.add(age, bytes / oopSize);
48 }
49 }
50
51 void ShenandoahEvacuationStats::accumulate(const ShenandoahEvacuationStats* other) {
52 _evacuations_completed += other->_evacuations_completed;
53 _bytes_completed += other->_bytes_completed;
54 _evacuations_attempted += other->_evacuations_attempted;
55 _bytes_attempted += other->_bytes_attempted;
56
57 _age_table.merge(&other->_age_table);
58 }
59
60 void ShenandoahEvacuationStats::reset() {
61 _evacuations_completed = _evacuations_attempted = 0;
62 _bytes_completed = _bytes_attempted = 0;
63 _age_table.clear();
64 }
65
66 void ShenandoahEvacuationStats::print_on(outputStream* st) {
67 size_t abandoned_size = _bytes_attempted - _bytes_completed;
68 size_t abandoned_count = _evacuations_attempted - _evacuations_completed;
69 st->print_cr("Evacuated " SIZE_FORMAT "%s across " SIZE_FORMAT " objects, "
70 "abandoned " SIZE_FORMAT "%s across " SIZE_FORMAT " objects.",
71 byte_size_in_proper_unit(_bytes_completed),
72 proper_unit_for_byte_size(_bytes_completed), _evacuations_completed,
73 byte_size_in_proper_unit(abandoned_size),
74 proper_unit_for_byte_size(abandoned_size), abandoned_count);
75 _age_table.print_on(st, InitialTenuringThreshold);
76 }
77
78 void ShenandoahEvacuationTracker::print_global_on(outputStream* st) {
79 print_evacuations_on(st, &_workers_global, &_mutators_global);
80 }
81
82 void ShenandoahEvacuationTracker::print_evacuations_on(outputStream* st,
83 ShenandoahEvacuationStats* workers,
84 ShenandoahEvacuationStats* mutators) {
85 st->print("Workers: ");
86 workers->print_on(st);
87 st->cr();
88 st->print("Mutators: ");
89 mutators->print_on(st);
90 st->cr();
91
92 AgeTable region_ages(false);
93 ShenandoahHeap* heap = ShenandoahHeap::heap();
94 for (uint i = 0; i < heap->num_regions(); ++i) {
95 ShenandoahHeapRegion* r = heap->get_region(i);
96 if (r->age() > 0 && r->age() < AgeTable::table_size) {
97 region_ages.add(r->age(), r->get_live_data_words());
98 }
99 }
100 st->print("Regions: ");
101 region_ages.print_on(st, InitialTenuringThreshold);
102 }
103
104 class ShenandoahStatAggregator : public ThreadClosure {
105 public:
106 ShenandoahEvacuationStats* _target;
107 explicit ShenandoahStatAggregator(ShenandoahEvacuationStats* target) : _target(target) {}
108 virtual void do_thread(Thread* thread) override {
109 ShenandoahEvacuationStats* local = ShenandoahThreadLocalData::evacuation_stats(thread);
110 _target->accumulate(local);
111 local->reset();
112 }
113 };
114
115 ShenandoahCycleStats ShenandoahEvacuationTracker::flush_cycle_to_global() {
116 ShenandoahEvacuationStats mutators, workers;
117
118 ThreadsListHandle java_threads_iterator;
119 ShenandoahStatAggregator aggregate_mutators(&mutators);
120 java_threads_iterator.list()->threads_do(&aggregate_mutators);
121
122 ShenandoahStatAggregator aggregate_workers(&workers);
123 ShenandoahHeap::heap()->gc_threads_do(&aggregate_workers);
124
125 _mutators_global.accumulate(&mutators);
126 _workers_global.accumulate(&workers);
127
128 return {workers, mutators};
129 }
130
131 void ShenandoahEvacuationTracker::begin_evacuation(Thread* thread, size_t bytes) {
132 ShenandoahThreadLocalData::begin_evacuation(thread, bytes);
133 }
134
135 void ShenandoahEvacuationTracker::end_evacuation(Thread* thread, size_t bytes, uint age) {
136 ShenandoahThreadLocalData::end_evacuation(thread, bytes, age);
137 }