1 /*
2 * Copyright (c) 2018, 2022, 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 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP
26 #define SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP
27
28 #include "gc/shared/plab.hpp"
29 #include "gc/shared/gcThreadLocalData.hpp"
30 #include "gc/shared/gc_globals.hpp"
31 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
32 #include "gc/shenandoah/shenandoahCodeRoots.hpp"
33 #include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp"
34 #include "runtime/javaThread.hpp"
35 #include "utilities/debug.hpp"
36 #include "utilities/sizes.hpp"
37
38 class ShenandoahThreadLocalData {
39 private:
40 char _gc_state;
41 // Evacuation OOM state
42 uint8_t _oom_scope_nesting_level;
43 bool _oom_during_evac;
44 SATBMarkQueue _satb_mark_queue;
45 PLAB* _gclab;
46 size_t _gclab_size;
47 double _paced_time;
48
49 ShenandoahThreadLocalData() :
50 _gc_state(0),
51 _oom_scope_nesting_level(0),
52 _oom_during_evac(false),
53 _satb_mark_queue(&ShenandoahBarrierSet::satb_mark_queue_set()),
54 _gclab(nullptr),
55 _gclab_size(0),
56 _paced_time(0) {
57 }
58
59 ~ShenandoahThreadLocalData() {
60 if (_gclab != nullptr) {
61 delete _gclab;
62 }
63 }
64
65 static ShenandoahThreadLocalData* data(Thread* thread) {
66 assert(UseShenandoahGC, "Sanity");
67 return thread->gc_data<ShenandoahThreadLocalData>();
68 }
69
70 static ByteSize satb_mark_queue_offset() {
71 return Thread::gc_data_offset() + byte_offset_of(ShenandoahThreadLocalData, _satb_mark_queue);
72 }
73
74 public:
75 static void create(Thread* thread) {
76 new (data(thread)) ShenandoahThreadLocalData();
77 }
78
79 static void destroy(Thread* thread) {
80 data(thread)->~ShenandoahThreadLocalData();
81 }
82
83 static SATBMarkQueue& satb_mark_queue(Thread* thread) {
84 return data(thread)->_satb_mark_queue;
85 }
86
87 static void set_gc_state(Thread* thread, char gc_state) {
88 data(thread)->_gc_state = gc_state;
89 }
90
91 static char gc_state(Thread* thread) {
92 assert(thread->is_Java_thread(), "GC state is only synchronized to java threads");
93 return data(thread)->_gc_state;
94 }
95
96 static void initialize_gclab(Thread* thread) {
97 assert (thread->is_Java_thread() || thread->is_Worker_thread(), "Only Java and GC worker threads are allowed to get GCLABs");
98 assert(data(thread)->_gclab == nullptr, "Only initialize once");
99 data(thread)->_gclab = new PLAB(PLAB::min_size());
100 data(thread)->_gclab_size = 0;
101 }
102
103 static PLAB* gclab(Thread* thread) {
104 return data(thread)->_gclab;
105 }
106
107 static size_t gclab_size(Thread* thread) {
108 return data(thread)->_gclab_size;
109 }
110
111 static void set_gclab_size(Thread* thread, size_t v) {
112 data(thread)->_gclab_size = v;
113 }
114
115 static void add_paced_time(Thread* thread, double v) {
116 data(thread)->_paced_time += v;
117 }
118
119 static double paced_time(Thread* thread) {
120 return data(thread)->_paced_time;
121 }
122
123 static void reset_paced_time(Thread* thread) {
124 data(thread)->_paced_time = 0;
125 }
126
127 // Evacuation OOM handling
128 static bool is_oom_during_evac(Thread* thread) {
129 return data(thread)->_oom_during_evac;
130 }
131
132 static void set_oom_during_evac(Thread* thread, bool oom) {
133 data(thread)->_oom_during_evac = oom;
134 }
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1 /*
2 * Copyright (c) 2018, 2022, Red Hat, Inc. All rights reserved.
3 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP
27 #define SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP
28
29 #include "gc/shared/plab.hpp"
30 #include "gc/shared/gcThreadLocalData.hpp"
31 #include "gc/shared/gc_globals.hpp"
32 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
33 #include "gc/shenandoah/shenandoahCodeRoots.hpp"
34 #include "gc/shenandoah/shenandoahGenerationalHeap.hpp"
35 #include "gc/shenandoah/shenandoahEvacTracker.hpp"
36 #include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp"
37 #include "gc/shenandoah/mode/shenandoahMode.hpp"
38 #include "runtime/javaThread.hpp"
39 #include "utilities/debug.hpp"
40 #include "utilities/sizes.hpp"
41
42 class ShenandoahThreadLocalData {
43 private:
44 char _gc_state;
45 // Evacuation OOM state
46 uint8_t _oom_scope_nesting_level;
47 bool _oom_during_evac;
48
49 SATBMarkQueue _satb_mark_queue;
50
51 // Thread-local allocation buffer for object evacuations.
52 // In generational mode, it is exclusive to the young generation.
53 PLAB* _gclab;
54 size_t _gclab_size;
55
56 double _paced_time;
57
58 // Thread-local allocation buffer only used in generational mode.
59 // Used both by mutator threads and by GC worker threads
60 // for evacuations within the old generation and
61 // for promotions from the young generation into the old generation.
62 PLAB* _plab;
63
64 // Heuristics will grow the desired size of plabs.
65 size_t _plab_desired_size;
66
67 // Once the plab has been allocated, and we know the actual size, we record it here.
68 size_t _plab_actual_size;
69
70 // As the plab is used for promotions, this value is incremented. When the plab is
71 // retired, the difference between 'actual_size' and 'promoted' will be returned to
72 // the old generation's promotion reserve (i.e., it will be 'unexpended').
73 size_t _plab_promoted;
74
75 // If false, no more promotion by this thread during this evacuation phase.
76 bool _plab_allows_promotion;
77
78 // If true, evacuations may attempt to allocate a smaller plab if the original size fails.
79 bool _plab_retries_enabled;
80
81 ShenandoahEvacuationStats* _evacuation_stats;
82
83 ShenandoahThreadLocalData();
84 ~ShenandoahThreadLocalData();
85
86 static ShenandoahThreadLocalData* data(Thread* thread) {
87 assert(UseShenandoahGC, "Sanity");
88 return thread->gc_data<ShenandoahThreadLocalData>();
89 }
90
91 static ByteSize satb_mark_queue_offset() {
92 return Thread::gc_data_offset() + byte_offset_of(ShenandoahThreadLocalData, _satb_mark_queue);
93 }
94
95 public:
96 static void create(Thread* thread) {
97 new (data(thread)) ShenandoahThreadLocalData();
98 }
99
100 static void destroy(Thread* thread) {
101 data(thread)->~ShenandoahThreadLocalData();
102 }
103
104 static SATBMarkQueue& satb_mark_queue(Thread* thread) {
105 return data(thread)->_satb_mark_queue;
106 }
107
108 static void set_gc_state(Thread* thread, char gc_state) {
109 data(thread)->_gc_state = gc_state;
110 }
111
112 static char gc_state(Thread* thread) {
113 assert(thread->is_Java_thread(), "GC state is only synchronized to java threads");
114 return data(thread)->_gc_state;
115 }
116
117 static void initialize_gclab(Thread* thread) {
118 assert (thread->is_Java_thread() || thread->is_Worker_thread(), "Only Java and GC worker threads are allowed to get GCLABs");
119 assert(data(thread)->_gclab == nullptr, "Only initialize once");
120 data(thread)->_gclab = new PLAB(PLAB::min_size());
121 data(thread)->_gclab_size = 0;
122
123 if (ShenandoahHeap::heap()->mode()->is_generational()) {
124 data(thread)->_plab = new PLAB(align_up(PLAB::min_size(), CardTable::card_size_in_words()));
125 data(thread)->_plab_desired_size = 0;
126 }
127 }
128
129 static PLAB* gclab(Thread* thread) {
130 return data(thread)->_gclab;
131 }
132
133 static size_t gclab_size(Thread* thread) {
134 return data(thread)->_gclab_size;
135 }
136
137 static void set_gclab_size(Thread* thread, size_t v) {
138 data(thread)->_gclab_size = v;
139 }
140
141 static void begin_evacuation(Thread* thread, size_t bytes) {
142 data(thread)->_evacuation_stats->begin_evacuation(bytes);
143 }
144
145 static void end_evacuation(Thread* thread, size_t bytes) {
146 data(thread)->_evacuation_stats->end_evacuation(bytes);
147 }
148
149 static void record_age(Thread* thread, size_t bytes, uint age) {
150 data(thread)->_evacuation_stats->record_age(bytes, age);
151 }
152
153 static ShenandoahEvacuationStats* evacuation_stats(Thread* thread) {
154 return data(thread)->_evacuation_stats;
155 }
156
157 static PLAB* plab(Thread* thread) {
158 return data(thread)->_plab;
159 }
160
161 static size_t plab_size(Thread* thread) {
162 return data(thread)->_plab_desired_size;
163 }
164
165 static void set_plab_size(Thread* thread, size_t v) {
166 data(thread)->_plab_desired_size = v;
167 }
168
169 static void enable_plab_retries(Thread* thread) {
170 data(thread)->_plab_retries_enabled = true;
171 }
172
173 static void disable_plab_retries(Thread* thread) {
174 data(thread)->_plab_retries_enabled = false;
175 }
176
177 static bool plab_retries_enabled(Thread* thread) {
178 return data(thread)->_plab_retries_enabled;
179 }
180
181 static void enable_plab_promotions(Thread* thread) {
182 data(thread)->_plab_allows_promotion = true;
183 }
184
185 static void disable_plab_promotions(Thread* thread) {
186 data(thread)->_plab_allows_promotion = false;
187 }
188
189 static bool allow_plab_promotions(Thread* thread) {
190 return data(thread)->_plab_allows_promotion;
191 }
192
193 static void reset_plab_promoted(Thread* thread) {
194 data(thread)->_plab_promoted = 0;
195 }
196
197 static void add_to_plab_promoted(Thread* thread, size_t increment) {
198 data(thread)->_plab_promoted += increment;
199 }
200
201 static void subtract_from_plab_promoted(Thread* thread, size_t increment) {
202 assert(data(thread)->_plab_promoted >= increment, "Cannot subtract more than remaining promoted");
203 data(thread)->_plab_promoted -= increment;
204 }
205
206 static size_t get_plab_promoted(Thread* thread) {
207 return data(thread)->_plab_promoted;
208 }
209
210 static void set_plab_actual_size(Thread* thread, size_t value) {
211 data(thread)->_plab_actual_size = value;
212 }
213
214 static size_t get_plab_actual_size(Thread* thread) {
215 return data(thread)->_plab_actual_size;
216 }
217
218 static void add_paced_time(Thread* thread, double v) {
219 data(thread)->_paced_time += v;
220 }
221
222 static double paced_time(Thread* thread) {
223 return data(thread)->_paced_time;
224 }
225
226 static void reset_paced_time(Thread* thread) {
227 data(thread)->_paced_time = 0;
228 }
229
230 // Evacuation OOM handling
231 static bool is_oom_during_evac(Thread* thread) {
232 return data(thread)->_oom_during_evac;
233 }
234
235 static void set_oom_during_evac(Thread* thread, bool oom) {
236 data(thread)->_oom_during_evac = oom;
237 }
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