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 return ZMinor;
47 }
48
49 if (UseShenandoahGC) {
50 return NA;
51 }
52
53 return DefNew;
54 }
55
56 GCName GCConfiguration::old_collector() const {
57 if (UseG1GC) {
58 return G1Old;
59 }
60
61 if (UseParallelGC) {
62 return ParallelOld;
63 }
64
65 if (UseZGC) {
66 return ZMajor;
67 }
68
69 if (UseShenandoahGC) {
70 return Shenandoah;
71 }
72
73 return SerialOld;
74 }
75
76 uint GCConfiguration::num_parallel_gc_threads() const {
77 return ParallelGCThreads;
78 }
79
80 uint GCConfiguration::num_concurrent_gc_threads() const {
81 return ConcGCThreads;
82 }
83
84 bool GCConfiguration::uses_dynamic_gc_threads() const {
85 return UseDynamicNumberOfGCThreads;
86 }
87
88 bool GCConfiguration::is_explicit_gc_concurrent() const {
89 return ExplicitGCInvokesConcurrent;
90 }
91
92 bool GCConfiguration::is_explicit_gc_disabled() const {
93 return DisableExplicitGC;
94 }
95
96 bool GCConfiguration::has_pause_target_default_value() const {
97 return FLAG_IS_DEFAULT(MaxGCPauseMillis);
98 }
99
100 uintx GCConfiguration::pause_target() const {
101 return MaxGCPauseMillis;
102 }
103
104 uintx GCConfiguration::gc_time_ratio() const {
105 return GCTimeRatio;
106 }
107
108 bool GCTLABConfiguration::uses_tlabs() const {
109 return UseTLAB;
110 }
111
112 size_t GCTLABConfiguration::min_tlab_size() const {
113 return MinTLABSize;
114 }
115
116 uint GCTLABConfiguration::tlab_refill_waste_limit() const {
117 return TLABRefillWasteFraction;
118 }
119
120 intx GCSurvivorConfiguration::max_tenuring_threshold() const {
121 return MaxTenuringThreshold;
122 }
123
124 intx GCSurvivorConfiguration::initial_tenuring_threshold() const {
125 return InitialTenuringThreshold;
126 }
127
128 size_t GCHeapConfiguration::max_size() const {
129 return MaxHeapSize;
130 }
131
132 size_t GCHeapConfiguration::min_size() const {
133 return MinHeapSize;
134 }
135
136 size_t GCHeapConfiguration::initial_size() const {
137 return InitialHeapSize;
138 }
139
140 bool GCHeapConfiguration::uses_compressed_oops() const {
141 return UseCompressedOops;
142 }
143
144 CompressedOops::Mode GCHeapConfiguration::narrow_oop_mode() const {
145 return CompressedOops::mode();
146 }
147
148 uint GCHeapConfiguration::object_alignment_in_bytes() const {
149 return ObjectAlignmentInBytes;
150 }
151
152 int GCHeapConfiguration::heap_address_size_in_bits() const {
153 return BitsPerHeapOop;
154 }
155
156 bool GCYoungGenerationConfiguration::has_max_size_default_value() const {
157 return FLAG_IS_DEFAULT(MaxNewSize);
158 }
159
160 uintx GCYoungGenerationConfiguration::max_size() const {
161 return MaxNewSize;
162 }
163
164 uintx GCYoungGenerationConfiguration::min_size() const {
165 return NewSize;
166 }
167
168 intx GCYoungGenerationConfiguration::new_ratio() const {
169 return NewRatio;
170 }