1 /*
2 * Copyright (c) 2017, 2021, Red Hat, 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
25 #include "precompiled.hpp"
26
27 #include "jfr/jfrEvents.hpp"
28 #include "gc/shared/gcCause.hpp"
29 #include "gc/shared/gcTrace.hpp"
30 #include "gc/shared/gcWhen.hpp"
31 #include "gc/shared/referenceProcessorStats.hpp"
32 #include "gc/shenandoah/heuristics/shenandoahHeuristics.hpp"
33 #include "gc/shenandoah/shenandoahCollectorPolicy.hpp"
34 #include "gc/shenandoah/shenandoahGeneration.hpp"
35 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
36 #include "gc/shenandoah/shenandoahReferenceProcessor.hpp"
37 #include "gc/shenandoah/shenandoahUtils.hpp"
38 #include "gc/shenandoah/shenandoahYoungGeneration.hpp"
39 #include "utilities/debug.hpp"
40
41 ShenandoahPhaseTimings::Phase ShenandoahTimingsTracker::_current_phase = ShenandoahPhaseTimings::_invalid_phase;
42
43 ShenandoahGCSession::ShenandoahGCSession(GCCause::Cause cause, ShenandoahGeneration* generation) :
44 _heap(ShenandoahHeap::heap()),
45 _generation(generation),
46 _timer(_heap->gc_timer()),
47 _tracer(_heap->tracer()) {
48 assert(!ShenandoahGCPhase::is_current_phase_valid(), "No current GC phase");
49
50 _heap->set_gc_cause(cause);
51 _heap->set_gc_generation(generation);
52 _timer->register_gc_start();
53 _tracer->report_gc_start(cause, _timer->gc_start());
54 _heap->trace_heap_before_gc(_tracer);
55
56 _heap->shenandoah_policy()->record_cycle_start();
57 generation->heuristics()->record_cycle_start();
58 _trace_cycle.initialize(_heap->cycle_memory_manager(), cause,
59 /* allMemoryPoolsAffected */ true,
60 /* recordGCBeginTime = */ true,
61 /* recordPreGCUsage = */ true,
62 /* recordPeakUsage = */ true,
63 /* recordPostGCUsage = */ true,
64 /* recordAccumulatedGCTime = */ true,
65 /* recordGCEndTime = */ true,
66 /* countCollection = */ true
67 );
68 }
69
70
71 ShenandoahGCSession::~ShenandoahGCSession() {
72
73 _generation->heuristics()->record_cycle_end();
74 if (_heap->mode()->is_generational() &&
75 ((_generation->generation_mode() == GLOBAL) || _heap->upgraded_to_full())) {
76 // If we just completed a GLOBAL GC, claim credit for completion of young-gen and old-gen GC as well
77 _heap->young_generation()->heuristics()->record_cycle_end();
78 _heap->old_generation()->heuristics()->record_cycle_end();
79 }
80 _timer->register_gc_end();
81 _heap->trace_heap_after_gc(_tracer);
82 _tracer->report_gc_reference_stats(_generation->ref_processor()->reference_process_stats());
83 _tracer->report_gc_end(_timer->gc_end(), _timer->time_partitions());
84 assert(!ShenandoahGCPhase::is_current_phase_valid(), "No current GC phase");
85 _heap->set_gc_cause(GCCause::_no_gc);
86 }
87
88 ShenandoahGCPauseMark::ShenandoahGCPauseMark(uint gc_id, SvcGCMarker::reason_type type) :
89 _heap(ShenandoahHeap::heap()), _gc_id_mark(gc_id), _svc_gc_mark(type), _is_gc_active_mark() {
90 _trace_pause.initialize(_heap->stw_memory_manager(), _heap->gc_cause(),
91 /* allMemoryPoolsAffected */ true,
92 /* recordGCBeginTime = */ true,
93 /* recordPreGCUsage = */ false,
94 /* recordPeakUsage = */ false,
95 /* recordPostGCUsage = */ false,
96 /* recordAccumulatedGCTime = */ true,
97 /* recordGCEndTime = */ true,
98 /* countCollection = */ true
99 );
100 }
101
102 ShenandoahPausePhase::ShenandoahPausePhase(const char* title, ShenandoahPhaseTimings::Phase phase, bool log_heap_usage) :
103 ShenandoahTimingsTracker(phase),
104 _tracer(title, NULL, GCCause::_no_gc, log_heap_usage),
105 _timer(ShenandoahHeap::heap()->gc_timer()) {
106 _timer->register_gc_pause_start(title);
107 }
108
109 ShenandoahPausePhase::~ShenandoahPausePhase() {
110 _timer->register_gc_pause_end();
111 }
112
113 ShenandoahConcurrentPhase::ShenandoahConcurrentPhase(const char* title, ShenandoahPhaseTimings::Phase phase, bool log_heap_usage) :
114 ShenandoahTimingsTracker(phase),
115 _tracer(title, NULL, GCCause::_no_gc, log_heap_usage),
116 _timer(ShenandoahHeap::heap()->gc_timer()) {
117 _timer->register_gc_concurrent_start(title);
118 }
119
120 ShenandoahConcurrentPhase::~ShenandoahConcurrentPhase() {
121 _timer->register_gc_concurrent_end();
122 }
123
124 ShenandoahTimingsTracker::ShenandoahTimingsTracker(ShenandoahPhaseTimings::Phase phase) :
125 _timings(ShenandoahHeap::heap()->phase_timings()), _phase(phase) {
126 assert(Thread::current()->is_VM_thread() || Thread::current()->is_ConcurrentGC_thread(),
127 "Must be set by these threads");
128 _parent_phase = _current_phase;
129 _current_phase = phase;
130 _start = os::elapsedTime();
131 }
132
133 ShenandoahTimingsTracker::~ShenandoahTimingsTracker() {
134 _timings->record_phase_time(_phase, os::elapsedTime() - _start);
135 _current_phase = _parent_phase;
136 }
137
138 bool ShenandoahTimingsTracker::is_current_phase_valid() {
139 return _current_phase < ShenandoahPhaseTimings::_num_phases;
140 }
141
142 ShenandoahGCPhase::ShenandoahGCPhase(ShenandoahPhaseTimings::Phase phase) :
143 ShenandoahTimingsTracker(phase),
144 _timer(ShenandoahHeap::heap()->gc_timer()) {
145 _timer->register_gc_phase_start(ShenandoahPhaseTimings::phase_name(phase), Ticks::now());
146 }
147
148 ShenandoahGCPhase::~ShenandoahGCPhase() {
149 _timer->register_gc_phase_end(Ticks::now());
150 }
151
152 ShenandoahGCWorkerPhase::ShenandoahGCWorkerPhase(const ShenandoahPhaseTimings::Phase phase) :
153 _timings(ShenandoahHeap::heap()->phase_timings()), _phase(phase) {
154 _timings->record_workers_start(_phase);
155 }
156
157 ShenandoahGCWorkerPhase::~ShenandoahGCWorkerPhase() {
158 _timings->record_workers_end(_phase);
159 }
160
161 ShenandoahWorkerSession::ShenandoahWorkerSession(uint worker_id) {
162 assert(worker_id == WorkerThread::worker_id(), "Wrong worker id");
163 }
164
165 ShenandoahConcurrentWorkerSession::~ShenandoahConcurrentWorkerSession() {
166 _event.commit(GCId::current(), ShenandoahPhaseTimings::phase_name(ShenandoahGCPhase::current_phase()));
167 }
168
169 ShenandoahParallelWorkerSession::~ShenandoahParallelWorkerSession() {
170 _event.commit(GCId::current(), WorkerThread::worker_id(), ShenandoahPhaseTimings::phase_name(ShenandoahGCPhase::current_phase()));
171 }