1 /*
2 * Copyright (c) 2012, 2023, Oracle and/or its affiliates. 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 #include "gc/shared/collectedHeap.hpp"
26 #include "gc/shared/gc_globals.hpp"
27 #include "gc/shared/gcArguments.hpp"
28 #include "gc/shared/gcConfiguration.hpp"
29 #include "gc/shared/tlab_globals.hpp"
30 #include "memory/universe.hpp"
31 #include "oops/compressedOops.hpp"
32 #include "runtime/globals.hpp"
33 #include "runtime/globals_extension.hpp"
34 #include "utilities/debug.hpp"
35
36 GCName GCConfiguration::young_collector() const {
37 if (UseG1GC) {
38 return G1New;
39 }
40
41 if (UseParallelGC) {
42 return ParallelScavenge;
43 }
44
45 if (UseZGC) {
46 if (ZGenerational) {
47 return ZMinor;
48 } else {
49 return NA;
50 }
51 }
52
53 if (UseShenandoahGC) {
54 #if INCLUDE_SHENANDOAHGC
55 if (ShenandoahCardBarrier) {
56 return ShenandoahYoung;
57 }
58 #endif
59 return NA;
60 }
61
62 return DefNew;
63 }
64
65 GCName GCConfiguration::old_collector() const {
66 if (UseG1GC) {
67 return G1Old;
68 }
69
70 if (UseParallelGC) {
71 return ParallelOld;
72 }
73
74 if (UseZGC) {
75 if (ZGenerational) {
76 return ZMajor;
77 } else {
78 return Z;
79 }
80 }
81
82 if (UseShenandoahGC) {
83 #if INCLUDE_SHENANDOAHGC
84 if (ShenandoahCardBarrier) {
85 return ShenandoahOld;
86 }
87 #endif
88 return Shenandoah;
89 }
90
91 return SerialOld;
92 }
93
94 uint GCConfiguration::num_parallel_gc_threads() const {
95 return ParallelGCThreads;
96 }
97
98 uint GCConfiguration::num_concurrent_gc_threads() const {
99 return ConcGCThreads;
100 }
101
102 bool GCConfiguration::uses_dynamic_gc_threads() const {
103 return UseDynamicNumberOfGCThreads;
104 }
105
106 bool GCConfiguration::is_explicit_gc_concurrent() const {
107 return ExplicitGCInvokesConcurrent;
108 }
109
110 bool GCConfiguration::is_explicit_gc_disabled() const {
111 return DisableExplicitGC;
112 }
113
114 bool GCConfiguration::has_pause_target_default_value() const {
115 return FLAG_IS_DEFAULT(MaxGCPauseMillis);
116 }
117
118 uintx GCConfiguration::pause_target() const {
119 return MaxGCPauseMillis;
120 }
121
122 uintx GCConfiguration::gc_time_ratio() const {
123 return GCTimeRatio;
124 }
125
126 bool GCTLABConfiguration::uses_tlabs() const {
127 return UseTLAB;
128 }
129
130 size_t GCTLABConfiguration::min_tlab_size() const {
131 return MinTLABSize;
132 }
133
134 uint GCTLABConfiguration::tlab_refill_waste_limit() const {
135 return TLABRefillWasteFraction;
136 }
137
138 intx GCSurvivorConfiguration::max_tenuring_threshold() const {
139 return MaxTenuringThreshold;
140 }
141
142 intx GCSurvivorConfiguration::initial_tenuring_threshold() const {
143 return InitialTenuringThreshold;
144 }
145
146 size_t GCHeapConfiguration::max_size() const {
147 return MaxHeapSize;
148 }
149
150 size_t GCHeapConfiguration::min_size() const {
151 return MinHeapSize;
152 }
153
154 size_t GCHeapConfiguration::initial_size() const {
155 return InitialHeapSize;
156 }
157
158 bool GCHeapConfiguration::uses_compressed_oops() const {
159 return UseCompressedOops;
160 }
161
162 CompressedOops::Mode GCHeapConfiguration::narrow_oop_mode() const {
163 return CompressedOops::mode();
164 }
165
166 uint GCHeapConfiguration::object_alignment_in_bytes() const {
167 return ObjectAlignmentInBytes;
168 }
169
170 int GCHeapConfiguration::heap_address_size_in_bits() const {
171 return BitsPerHeapOop;
172 }
173
174 bool GCYoungGenerationConfiguration::has_max_size_default_value() const {
175 return FLAG_IS_DEFAULT(MaxNewSize);
176 }
177
178 uintx GCYoungGenerationConfiguration::max_size() const {
179 return MaxNewSize;
180 }
181
182 uintx GCYoungGenerationConfiguration::min_size() const {
183 return NewSize;
184 }
185
186 intx GCYoungGenerationConfiguration::new_ratio() const {
187 return NewRatio;
188 }