1 /*
2 * Copyright (c) 2017, 2019, Red Hat, Inc. All rights reserved.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24 #include "precompiled.hpp"
25
26 #include "jfr/jfrEvents.hpp"
27 #include "gc/shared/gcCause.hpp"
28 #include "gc/shared/gcTrace.hpp"
29 #include "gc/shared/gcWhen.hpp"
30 #include "gc/shenandoah/shenandoahCollectorPolicy.hpp"
31 #include "gc/shenandoah/shenandoahMarkCompact.hpp"
32 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
33 #include "gc/shenandoah/shenandoahUtils.hpp"
34 #include "gc/shenandoah/heuristics/shenandoahHeuristics.hpp"
35 #include "utilities/debug.hpp"
36
37 ShenandoahPhaseTimings::Phase ShenandoahGCPhase::_current_phase = ShenandoahPhaseTimings::_invalid_phase;
38
39 ShenandoahGCSession::ShenandoahGCSession(GCCause::Cause cause) :
40 _heap(ShenandoahHeap::heap()),
41 _timer(_heap->gc_timer()),
42 _tracer(_heap->tracer()) {
43 assert(!ShenandoahGCPhase::is_current_phase_valid(), "No current GC phase");
44
45 _heap->set_gc_cause(cause);
46 _timer->register_gc_start();
47 _tracer->report_gc_start(cause, _timer->gc_start());
48 _heap->trace_heap_before_gc(_tracer);
49
50 _heap->shenandoah_policy()->record_cycle_start();
51 _heap->heuristics()->record_cycle_start();
52 _trace_cycle.initialize(_heap->cycle_memory_manager(), cause,
53 /* allMemoryPoolsAffected */ true,
54 /* recordGCBeginTime = */ true,
55 /* recordPreGCUsage = */ true,
56 /* recordPeakUsage = */ true,
57 /* recordPostGCUsage = */ true,
58 /* recordAccumulatedGCTime = */ true,
59 /* recordGCEndTime = */ true,
60 /* countCollection = */ true
61 );
62 }
63
64 ShenandoahGCSession::~ShenandoahGCSession() {
65 _heap->heuristics()->record_cycle_end();
66 _timer->register_gc_end();
67 _heap->trace_heap_after_gc(_tracer);
68 _tracer->report_gc_end(_timer->gc_end(), _timer->time_partitions());
69 assert(!ShenandoahGCPhase::is_current_phase_valid(), "No current GC phase");
70 _heap->set_gc_cause(GCCause::_no_gc);
71 }
72
73 ShenandoahGCPauseMark::ShenandoahGCPauseMark(uint gc_id, SvcGCMarker::reason_type type) :
74 _heap(ShenandoahHeap::heap()), _gc_id_mark(gc_id), _svc_gc_mark(type), _is_gc_active_mark() {
75
76 _trace_pause.initialize(_heap->stw_memory_manager(), _heap->gc_cause(),
77 /* allMemoryPoolsAffected */ true,
78 /* recordGCBeginTime = */ true,
79 /* recordPreGCUsage = */ false,
80 /* recordPeakUsage = */ false,
81 /* recordPostGCUsage = */ false,
82 /* recordAccumulatedGCTime = */ true,
83 /* recordGCEndTime = */ true,
84 /* countCollection = */ true
85 );
86 }
87
88 ShenandoahPausePhase::ShenandoahPausePhase(const char* title, bool log_heap_usage) :
89 _tracer(title, NULL, GCCause::_no_gc, log_heap_usage),
90 _timer(ShenandoahHeap::heap()->gc_timer()) {
91 _timer->register_gc_pause_start(title);
92 }
93
94 ShenandoahPausePhase::~ShenandoahPausePhase() {
95 _timer->register_gc_pause_end();
96 }
97
98 ShenandoahConcurrentPhase::ShenandoahConcurrentPhase(const char* title, bool log_heap_usage) :
99 _tracer(title, NULL, GCCause::_no_gc, log_heap_usage),
100 _timer(ShenandoahHeap::heap()->gc_timer()) {
101 _timer->register_gc_concurrent_start(title);
102 }
103
104 ShenandoahConcurrentPhase::~ShenandoahConcurrentPhase() {
105 _timer->register_gc_concurrent_end();
106 }
107
108 ShenandoahGCPhase::ShenandoahGCPhase(ShenandoahPhaseTimings::Phase phase) :
109 _timings(ShenandoahHeap::heap()->phase_timings()), _phase(phase) {
110 assert(!Thread::current()->is_Worker_thread() &&
111 (Thread::current()->is_VM_thread() ||
112 Thread::current()->is_ConcurrentGC_thread()),
113 "Must be set by these threads");
114 _parent_phase = _current_phase;
115 _current_phase = phase;
116 _start = os::elapsedTime();
117 }
118
119 ShenandoahGCPhase::~ShenandoahGCPhase() {
120 _timings->record_phase_time(_phase, os::elapsedTime() - _start);
121 _current_phase = _parent_phase;
122 }
123
124 bool ShenandoahGCPhase::is_current_phase_valid() {
125 return _current_phase < ShenandoahPhaseTimings::_num_phases;
126 }
127
128 ShenandoahGCSubPhase::ShenandoahGCSubPhase(ShenandoahPhaseTimings::Phase phase) :
129 ShenandoahGCPhase(phase),
130 _timer(ShenandoahHeap::heap()->gc_timer()) {
131 _timer->register_gc_phase_start(ShenandoahPhaseTimings::phase_name(phase), Ticks::now());
132 }
133
134 ShenandoahGCSubPhase::~ShenandoahGCSubPhase() {
135 _timer->register_gc_phase_end(Ticks::now());
136 }
137
138 ShenandoahGCWorkerPhase::ShenandoahGCWorkerPhase(const ShenandoahPhaseTimings::Phase phase) :
139 _timings(ShenandoahHeap::heap()->phase_timings()), _phase(phase) {
140 _timings->record_workers_start(_phase);
141 }
142
143 ShenandoahGCWorkerPhase::~ShenandoahGCWorkerPhase() {
144 _timings->record_workers_end(_phase);
145 }
146
147 ShenandoahWorkerSession::ShenandoahWorkerSession(uint worker_id) : _worker_id(worker_id) {
148 Thread* thr = Thread::current();
149 assert(ShenandoahThreadLocalData::worker_id(thr) == ShenandoahThreadLocalData::INVALID_WORKER_ID, "Already set");
150 ShenandoahThreadLocalData::set_worker_id(thr, worker_id);
151 }
152
153 ShenandoahConcurrentWorkerSession::~ShenandoahConcurrentWorkerSession() {
154 // Do nothing. Per-worker events are not supported in this JDK.
155 }
156
157 ShenandoahParallelWorkerSession::~ShenandoahParallelWorkerSession() {
158 // Do nothing. Per-worker events are not supported in this JDK.
159 }
160 ShenandoahWorkerSession::~ShenandoahWorkerSession() {
161 #ifdef ASSERT
162 Thread* thr = Thread::current();
163 assert(ShenandoahThreadLocalData::worker_id(thr) != ShenandoahThreadLocalData::INVALID_WORKER_ID, "Must be set");
164 ShenandoahThreadLocalData::set_worker_id(thr, ShenandoahThreadLocalData::INVALID_WORKER_ID);
165 #endif
166 }
167
168 size_t ShenandoahUtils::round_up_power_of_2(size_t value) {
169 assert(value != 0, "Invalid value");
170
171 if (is_power_of_2(value)) {
172 return value;
173 }
174
175 return (size_t)1 << (log2_intptr(value) + 1);
176 }
177