1 /*
2 * Copyright (c) 2012, 2021, 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/gcArguments.hpp"
27 #include "gc/shared/gcConfiguration.hpp"
28 #include "gc/shared/tlab_globals.hpp"
29 #include "memory/universe.hpp"
30 #include "oops/compressedOops.hpp"
31 #include "runtime/globals.hpp"
32 #include "runtime/globals_extension.hpp"
33 #include "utilities/debug.hpp"
34
young_collector() const35 GCName GCConfiguration::young_collector() const {
36 if (UseG1GC) {
37 return G1New;
38 }
39
40 if (UseParallelGC) {
41 return ParallelScavenge;
42 }
43
44 if (UseZGC || UseShenandoahGC) {
45 return NA;
46 }
47
48 return DefNew;
49 }
50
old_collector() const51 GCName GCConfiguration::old_collector() const {
52 if (UseG1GC) {
53 return G1Old;
54 }
55
56 if (UseParallelGC) {
57 return ParallelOld;
58 }
59
60 if (UseZGC) {
61 return Z;
62 }
63
64 if (UseShenandoahGC) {
65 return Shenandoah;
66 }
67
68 return SerialOld;
69 }
70
num_parallel_gc_threads() const71 uint GCConfiguration::num_parallel_gc_threads() const {
72 return ParallelGCThreads;
73 }
74
num_concurrent_gc_threads() const75 uint GCConfiguration::num_concurrent_gc_threads() const {
76 return ConcGCThreads;
77 }
78
uses_dynamic_gc_threads() const79 bool GCConfiguration::uses_dynamic_gc_threads() const {
80 return UseDynamicNumberOfGCThreads;
81 }
82
is_explicit_gc_concurrent() const83 bool GCConfiguration::is_explicit_gc_concurrent() const {
84 return ExplicitGCInvokesConcurrent;
85 }
86
is_explicit_gc_disabled() const87 bool GCConfiguration::is_explicit_gc_disabled() const {
88 return DisableExplicitGC;
89 }
90
has_pause_target_default_value() const91 bool GCConfiguration::has_pause_target_default_value() const {
92 return FLAG_IS_DEFAULT(MaxGCPauseMillis);
93 }
94
pause_target() const95 uintx GCConfiguration::pause_target() const {
96 return MaxGCPauseMillis;
97 }
98
gc_time_ratio() const99 uintx GCConfiguration::gc_time_ratio() const {
100 return GCTimeRatio;
101 }
102
uses_tlabs() const103 bool GCTLABConfiguration::uses_tlabs() const {
104 return UseTLAB;
105 }
106
min_tlab_size() const107 size_t GCTLABConfiguration::min_tlab_size() const {
108 return MinTLABSize;
109 }
110
tlab_refill_waste_limit() const111 uint GCTLABConfiguration::tlab_refill_waste_limit() const {
112 return TLABRefillWasteFraction;
113 }
114
max_tenuring_threshold() const115 intx GCSurvivorConfiguration::max_tenuring_threshold() const {
116 return MaxTenuringThreshold;
117 }
118
initial_tenuring_threshold() const119 intx GCSurvivorConfiguration::initial_tenuring_threshold() const {
120 return InitialTenuringThreshold;
121 }
122
max_size() const123 size_t GCHeapConfiguration::max_size() const {
124 return MaxHeapSize;
125 }
126
min_size() const127 size_t GCHeapConfiguration::min_size() const {
128 return MinHeapSize;
129 }
130
initial_size() const131 size_t GCHeapConfiguration::initial_size() const {
132 return InitialHeapSize;
133 }
134
uses_compressed_oops() const135 bool GCHeapConfiguration::uses_compressed_oops() const {
136 return UseCompressedOops;
137 }
138
narrow_oop_mode() const139 CompressedOops::Mode GCHeapConfiguration::narrow_oop_mode() const {
140 return CompressedOops::mode();
141 }
142
object_alignment_in_bytes() const143 uint GCHeapConfiguration::object_alignment_in_bytes() const {
144 return ObjectAlignmentInBytes;
145 }
146
heap_address_size_in_bits() const147 int GCHeapConfiguration::heap_address_size_in_bits() const {
148 return BitsPerHeapOop;
149 }
150
has_max_size_default_value() const151 bool GCYoungGenerationConfiguration::has_max_size_default_value() const {
152 return FLAG_IS_DEFAULT(MaxNewSize);
153 }
154
max_size() const155 uintx GCYoungGenerationConfiguration::max_size() const {
156 return MaxNewSize;
157 }
158
min_size() const159 uintx GCYoungGenerationConfiguration::min_size() const {
160 return NewSize;
161 }
162
new_ratio() const163 intx GCYoungGenerationConfiguration::new_ratio() const {
164 return NewRatio;
165 }
166