1 /*
2 * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
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 "gc_implementation/shenandoah/shenandoahAllocTracker.hpp"
27 #include "gc_implementation/shenandoah/shenandoahCollectorPolicy.hpp"
28 #include "gc_implementation/shenandoah/shenandoahMarkCompact.hpp"
29 #include "gc_implementation/shenandoah/shenandoahHeap.hpp"
30 #include "gc_implementation/shenandoah/shenandoahHeuristics.hpp"
31 #include "gc_implementation/shenandoah/shenandoahUtils.hpp"
32 #include "gc_implementation/shenandoah/shenandoahLogging.hpp"
33 #include "gc_interface/gcCause.hpp"
34 #include "gc_implementation/shared/gcTimer.hpp"
35 #include "gc_implementation/shared/gcWhen.hpp"
36 #include "gc_implementation/shared/gcTrace.hpp"
37
38
39 ShenandoahGCSession::ShenandoahGCSession(GCCause::Cause cause) :
40 _timer(ShenandoahHeap::heap()->gc_timer()),
41 _tracer(ShenandoahHeap::heap()->tracer()) {
42 ShenandoahHeap* sh = ShenandoahHeap::heap();
43
44 _timer->register_gc_start();
45 _tracer->report_gc_start(cause, _timer->gc_start());
46 sh->trace_heap(GCWhen::BeforeGC, _tracer);
47
48 sh->shenandoahPolicy()->record_cycle_start();
49 sh->heuristics()->record_cycle_start();
50 _trace_cycle.initialize(false, sh->gc_cause(),
51 /* recordGCBeginTime = */ true,
52 /* recordPreGCUsage = */ true,
53 /* recordPeakUsage = */ true,
54 /* recordPostGCUsage = */ true,
55 /* recordAccumulatedGCTime = */ true,
56 /* recordGCEndTime = */ true,
57 /* countCollection = */ true
58 );
59 }
60
61 ShenandoahGCSession::~ShenandoahGCSession() {
62 ShenandoahHeap::heap()->heuristics()->record_cycle_end();
63 _tracer->report_gc_end(_timer->gc_end(), _timer->time_partitions());
64 _timer->register_gc_end();
65 }
66
67 ShenandoahGCPauseMark::ShenandoahGCPauseMark(SvcGCMarker::reason_type type) :
68 _svc_gc_mark(type), _is_gc_active_mark() {
69 ShenandoahHeap* sh = ShenandoahHeap::heap();
70
71 // FIXME: It seems that JMC throws away level 0 events, which are the Shenandoah
72 // pause events. Create this pseudo level 0 event to push real events to level 1.
73 sh->gc_timer()->register_gc_phase_start("Shenandoah", Ticks::now());
74 _trace_pause.initialize(true, sh->gc_cause(),
75 /* recordGCBeginTime = */ true,
76 /* recordPreGCUsage = */ false,
77 /* recordPeakUsage = */ false,
78 /* recordPostGCUsage = */ false,
79 /* recordAccumulatedGCTime = */ true,
80 /* recordGCEndTime = */ true,
81 /* countCollection = */ true
82 );
83
84 sh->heuristics()->record_gc_start();
85 }
86
87 ShenandoahGCPauseMark::~ShenandoahGCPauseMark() {
88 ShenandoahHeap* sh = ShenandoahHeap::heap();
89 sh->gc_timer()->register_gc_phase_end(Ticks::now());
90 sh->heuristics()->record_gc_end();
91 }
92
93 ShenandoahGCPhase::ShenandoahGCPhase(const ShenandoahPhaseTimings::Phase phase) :
94 _phase(phase) {
95 ShenandoahHeap::heap()->phase_timings()->record_phase_start(_phase);
96 }
97
98 ShenandoahGCPhase::~ShenandoahGCPhase() {
99 ShenandoahHeap::heap()->phase_timings()->record_phase_end(_phase);
100 }
101
102 ShenandoahAllocTrace::ShenandoahAllocTrace(size_t words_size, ShenandoahHeap::AllocType alloc_type) {
103 if (ShenandoahAllocationTrace) {
104 _start = os::elapsedTime();
105 _size = words_size;
106 _alloc_type = alloc_type;
107 } else {
108 _start = 0;
109 _size = 0;
110 _alloc_type = ShenandoahHeap::AllocType(0);
111 }
112 }
113
114 ShenandoahAllocTrace::~ShenandoahAllocTrace() {
115 if (ShenandoahAllocationTrace) {
116 double stop = os::elapsedTime();
117 double duration_sec = stop - _start;
118 double duration_us = duration_sec * 1000000;
119 ShenandoahAllocTracker* tracker = ShenandoahHeap::heap()->alloc_tracker();
120 assert(tracker != NULL, "Must be");
121 tracker->record_alloc_latency(_size, _alloc_type, duration_us);
122 if (duration_us > ShenandoahAllocationStallThreshold) {
123 log_warning(gc)("Allocation stall: %.0f us (threshold: " INTX_FORMAT " us)",
124 duration_us, ShenandoahAllocationStallThreshold);
125 }
126 }
127 }
128
129 ShenandoahWorkerSession::ShenandoahWorkerSession(uint worker_id) {
130 Thread* thr = Thread::current();
131 assert(thr->worker_id() == INVALID_WORKER_ID, "Already set");
132 thr->set_worker_id(worker_id);
133 }
134
135 ShenandoahWorkerSession::~ShenandoahWorkerSession() {
136 #ifdef ASSERT
137 Thread* thr = Thread::current();
138 assert(thr->worker_id() != INVALID_WORKER_ID, "Must be set");
139 thr->set_worker_id(INVALID_WORKER_ID);
140 #endif
141 }
142