1 /* 2 * Copyright (c) 2012, 2018, 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 26 #include "gc/shared/collectedHeap.hpp" 27 #include "gc/shared/gcConfiguration.hpp" 28 #include "memory/universe.hpp" 29 #include "runtime/arguments.hpp" 30 #include "runtime/globals.hpp" 31 #include "utilities/debug.hpp" 32 33 GCName GCConfiguration::young_collector() const { 34 if (UseG1GC) { 35 return G1New; 36 } 37 38 if (UseParallelGC) { 39 return ParallelScavenge; 40 } 41 42 if (UseConcMarkSweepGC) { 43 return ParNew; 44 } 45 46 if (UseZGC) { 47 return NA; 48 } 49 50 return DefNew; 51 } 52 53 GCName GCConfiguration::old_collector() const { 54 if (UseG1GC) { 55 return G1Old; 56 } 57 58 if (UseConcMarkSweepGC) { 59 return ConcurrentMarkSweep; 60 } 61 62 if (UseParallelOldGC) { 63 return ParallelOld; 64 } 65 66 if (UseZGC) { 67 return Z; 68 } 69 70 return SerialOld; 71 } 72 73 uint GCConfiguration::num_parallel_gc_threads() const { 74 return ParallelGCThreads; 75 } 76 77 uint GCConfiguration::num_concurrent_gc_threads() const { 78 return ConcGCThreads; 79 } 80 81 bool GCConfiguration::uses_dynamic_gc_threads() const { 82 return UseDynamicNumberOfGCThreads; 83 } 84 85 bool GCConfiguration::is_explicit_gc_concurrent() const { 86 return ExplicitGCInvokesConcurrent; 87 } 88 89 bool GCConfiguration::is_explicit_gc_disabled() const { 90 return DisableExplicitGC; 91 } 92 93 bool GCConfiguration::has_pause_target_default_value() const { 94 return FLAG_IS_DEFAULT(MaxGCPauseMillis); 95 } 96 97 uintx GCConfiguration::pause_target() const { 98 return MaxGCPauseMillis; 99 } 100 101 uintx GCConfiguration::gc_time_ratio() const { 102 return GCTimeRatio; 103 } 104 105 bool GCTLABConfiguration::uses_tlabs() const { 106 return UseTLAB; 107 } 108 109 size_t GCTLABConfiguration::min_tlab_size() const { 110 return MinTLABSize; 111 } 112 113 uint GCTLABConfiguration::tlab_refill_waste_limit() const { 114 return TLABRefillWasteFraction; 115 } 116 117 intx GCSurvivorConfiguration::max_tenuring_threshold() const { 118 return MaxTenuringThreshold; 119 } 120 121 intx GCSurvivorConfiguration::initial_tenuring_threshold() const { 122 return InitialTenuringThreshold; 123 } 124 125 size_t GCHeapConfiguration::max_size() const { 126 return MaxHeapSize; 127 } 128 129 size_t GCHeapConfiguration::min_size() const { 130 return Arguments::min_heap_size(); 131 } 132 133 size_t GCHeapConfiguration::initial_size() const { 134 return InitialHeapSize; 135 } 136 137 bool GCHeapConfiguration::uses_compressed_oops() const { 138 return UseCompressedOops; 139 } 140 141 Universe::NARROW_OOP_MODE GCHeapConfiguration::narrow_oop_mode() const { 142 return Universe::narrow_oop_mode(); 143 } 144 145 uint GCHeapConfiguration::object_alignment_in_bytes() const { 146 return ObjectAlignmentInBytes; 147 } 148 149 int GCHeapConfiguration::heap_address_size_in_bits() const { 150 return BitsPerHeapOop; 151 } 152 153 bool GCYoungGenerationConfiguration::has_max_size_default_value() const { 154 return FLAG_IS_DEFAULT(MaxNewSize); 155 } 156 157 uintx GCYoungGenerationConfiguration::max_size() const { 158 return MaxNewSize; 159 } 160 161 uintx GCYoungGenerationConfiguration::min_size() const { 162 return NewSize; 163 } 164 165 intx GCYoungGenerationConfiguration::new_ratio() const { 166 return NewRatio; 167 }