1 /*
   2  * Copyright (c) 2012, 2019, 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/gcArguments.hpp"
  28 #include "gc/shared/gcConfiguration.hpp"
  29 #include "memory/universe.hpp"
  30 #include "oops/compressedOops.hpp"
  31 #include "runtime/arguments.hpp"
  32 #include "runtime/globals.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 (UseParallelOldGC) {
  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 }