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 35 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 51 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 71 uint GCConfiguration::num_parallel_gc_threads() const { 72 return ParallelGCThreads; 73 } 74 75 uint GCConfiguration::num_concurrent_gc_threads() const { 76 return ConcGCThreads; 77 } 78 79 bool GCConfiguration::uses_dynamic_gc_threads() const { 80 return UseDynamicNumberOfGCThreads; 81 } 82 83 bool GCConfiguration::is_explicit_gc_concurrent() const { 84 return ExplicitGCInvokesConcurrent; 85 } 86 87 bool GCConfiguration::is_explicit_gc_disabled() const { 88 return DisableExplicitGC; 89 } 90 91 bool GCConfiguration::has_pause_target_default_value() const { 92 return FLAG_IS_DEFAULT(MaxGCPauseMillis); 93 } 94 95 uintx GCConfiguration::pause_target() const { 96 return MaxGCPauseMillis; 97 } 98 99 uintx GCConfiguration::gc_time_ratio() const { 100 return GCTimeRatio; 101 } 102 103 bool GCTLABConfiguration::uses_tlabs() const { 104 return UseTLAB; 105 } 106 107 size_t GCTLABConfiguration::min_tlab_size() const { 108 return MinTLABSize; 109 } 110 111 uint GCTLABConfiguration::tlab_refill_waste_limit() const { 112 return TLABRefillWasteFraction; 113 } 114 115 intx GCSurvivorConfiguration::max_tenuring_threshold() const { 116 return MaxTenuringThreshold; 117 } 118 119 intx GCSurvivorConfiguration::initial_tenuring_threshold() const { 120 return InitialTenuringThreshold; 121 } 122 123 size_t GCHeapConfiguration::max_size() const { 124 return MaxHeapSize; 125 } 126 127 size_t GCHeapConfiguration::min_size() const { 128 return MinHeapSize; 129 } 130 131 size_t GCHeapConfiguration::initial_size() const { 132 return InitialHeapSize; 133 } 134 135 bool GCHeapConfiguration::uses_compressed_oops() const { 136 return UseCompressedOops; 137 } 138 139 CompressedOops::Mode GCHeapConfiguration::narrow_oop_mode() const { 140 return CompressedOops::mode(); 141 } 142 143 uint GCHeapConfiguration::object_alignment_in_bytes() const { 144 return ObjectAlignmentInBytes; 145 } 146 147 int GCHeapConfiguration::heap_address_size_in_bits() const { 148 return BitsPerHeapOop; 149 } 150 151 bool GCYoungGenerationConfiguration::has_max_size_default_value() const { 152 return FLAG_IS_DEFAULT(MaxNewSize); 153 } 154 155 uintx GCYoungGenerationConfiguration::max_size() const { 156 return MaxNewSize; 157 } 158 159 uintx GCYoungGenerationConfiguration::min_size() const { 160 return NewSize; 161 } 162 163 intx GCYoungGenerationConfiguration::new_ratio() const { 164 return NewRatio; 165 }