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annotate src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp @ 12238:9e11762cee52
8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize
Reviewed-by: jwilhelm, brutisso, tschatzl
| author | stefank |
|---|---|
| date | Fri, 13 Sep 2013 22:22:14 +0200 |
| parents | 40136aa2cdb1 |
| children | 46d7652b223c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARALLELSCAVENGEHEAP_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARALLELSCAVENGEHEAP_HPP | |
| 27 | |
| 28 #include "gc_implementation/parallelScavenge/objectStartArray.hpp" | |
| 29 #include "gc_implementation/parallelScavenge/psGCAdaptivePolicyCounters.hpp" | |
| 30 #include "gc_implementation/parallelScavenge/psOldGen.hpp" | |
| 31 #include "gc_implementation/parallelScavenge/psYoungGen.hpp" | |
| 32 #include "gc_implementation/shared/gcPolicyCounters.hpp" | |
| 10405 | 33 #include "gc_implementation/shared/gcWhen.hpp" |
| 1972 | 34 #include "gc_interface/collectedHeap.inline.hpp" |
| 35 #include "utilities/ostream.hpp" | |
| 36 | |
| 0 | 37 class AdjoiningGenerations; |
| 10405 | 38 class CollectorPolicy; |
| 39 class GCHeapSummary; | |
| 0 | 40 class GCTaskManager; |
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41 class GenerationSizer; |
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42 class CollectorPolicy; |
| 10405 | 43 class PSAdaptiveSizePolicy; |
| 44 class PSHeapSummary; | |
| 0 | 45 |
| 46 class ParallelScavengeHeap : public CollectedHeap { | |
| 47 friend class VMStructs; | |
| 48 private: | |
| 49 static PSYoungGen* _young_gen; | |
| 50 static PSOldGen* _old_gen; | |
| 51 | |
| 52 // Sizing policy for entire heap | |
| 53 static PSAdaptiveSizePolicy* _size_policy; | |
| 54 static PSGCAdaptivePolicyCounters* _gc_policy_counters; | |
| 55 | |
| 56 static ParallelScavengeHeap* _psh; | |
| 57 | |
| 58 size_t _young_gen_alignment; | |
| 59 size_t _old_gen_alignment; | |
| 60 | |
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61 GenerationSizer* _collector_policy; |
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62 |
| 0 | 63 inline size_t set_alignment(size_t& var, size_t val); |
| 64 | |
| 65 // Collection of generations that are adjacent in the | |
| 66 // space reserved for the heap. | |
| 67 AdjoiningGenerations* _gens; | |
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68 unsigned int _death_march_count; |
| 0 | 69 |
| 70 static GCTaskManager* _gc_task_manager; // The task manager. | |
| 71 | |
| 10405 | 72 void trace_heap(GCWhen::Type when, GCTracer* tracer); |
| 73 | |
| 0 | 74 protected: |
| 75 static inline size_t total_invocations(); | |
| 76 HeapWord* allocate_new_tlab(size_t size); | |
| 77 | |
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78 inline bool should_alloc_in_eden(size_t size) const; |
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79 inline void death_march_check(HeapWord* const result, size_t size); |
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80 HeapWord* mem_allocate_old_gen(size_t size); |
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81 |
| 0 | 82 public: |
| 83 ParallelScavengeHeap() : CollectedHeap() { | |
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84 _death_march_count = 0; |
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85 set_alignment(_young_gen_alignment, intra_heap_alignment()); |
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86 set_alignment(_old_gen_alignment, intra_heap_alignment()); |
| 0 | 87 } |
| 88 | |
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89 // Return the (conservative) maximum heap alignment |
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90 static size_t conservative_max_heap_alignment() { |
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91 return intra_heap_alignment(); |
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92 } |
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93 |
| 0 | 94 // For use by VM operations |
| 95 enum CollectionType { | |
| 96 Scavenge, | |
| 97 MarkSweep | |
| 98 }; | |
| 99 | |
| 100 ParallelScavengeHeap::Name kind() const { | |
| 101 return CollectedHeap::ParallelScavengeHeap; | |
| 102 } | |
| 103 | |
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104 virtual CollectorPolicy* collector_policy() const { return (CollectorPolicy*) _collector_policy; } |
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105 |
| 0 | 106 static PSYoungGen* young_gen() { return _young_gen; } |
| 107 static PSOldGen* old_gen() { return _old_gen; } | |
| 108 | |
| 109 virtual PSAdaptiveSizePolicy* size_policy() { return _size_policy; } | |
| 110 | |
| 111 static PSGCAdaptivePolicyCounters* gc_policy_counters() { return _gc_policy_counters; } | |
| 112 | |
| 113 static ParallelScavengeHeap* heap(); | |
| 114 | |
| 115 static GCTaskManager* const gc_task_manager() { return _gc_task_manager; } | |
| 116 | |
| 117 AdjoiningGenerations* gens() { return _gens; } | |
| 118 | |
| 119 // Returns JNI_OK on success | |
| 120 virtual jint initialize(); | |
| 121 | |
| 122 void post_initialize(); | |
| 123 void update_counters(); | |
| 124 // The alignment used for the various generations. | |
| 125 size_t young_gen_alignment() const { return _young_gen_alignment; } | |
| 126 size_t old_gen_alignment() const { return _old_gen_alignment; } | |
| 127 | |
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128 // The alignment used for eden and survivors within the young gen |
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129 // and for boundary between young gen and old gen. |
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130 static size_t intra_heap_alignment() { return 64 * K * HeapWordSize; } |
| 0 | 131 |
| 132 size_t capacity() const; | |
| 133 size_t used() const; | |
| 134 | |
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135 // Return "true" if all generations have reached the |
| 0 | 136 // maximal committed limit that they can reach, without a garbage |
| 137 // collection. | |
| 138 virtual bool is_maximal_no_gc() const; | |
| 139 | |
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140 // Return true if the reference points to an object that |
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141 // can be moved in a partial collection. For currently implemented |
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142 // generational collectors that means during a collection of |
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143 // the young gen. |
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144 virtual bool is_scavengable(const void* addr); |
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145 |
| 0 | 146 // Does this heap support heap inspection? (+PrintClassHistogram) |
| 147 bool supports_heap_inspection() const { return true; } | |
| 148 | |
| 149 size_t max_capacity() const; | |
| 150 | |
| 151 // Whether p is in the allocated part of the heap | |
| 152 bool is_in(const void* p) const; | |
| 153 | |
| 154 bool is_in_reserved(const void* p) const; | |
| 155 | |
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156 #ifdef ASSERT |
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157 virtual bool is_in_partial_collection(const void *p); |
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158 #endif |
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159 |
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160 bool is_in_young(oop p); // reserved part |
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161 bool is_in_old(oop p); // reserved part |
| 0 | 162 |
| 163 // Memory allocation. "gc_time_limit_was_exceeded" will | |
| 164 // be set to true if the adaptive size policy determine that | |
| 165 // an excessive amount of time is being spent doing collections | |
| 166 // and caused a NULL to be returned. If a NULL is not returned, | |
| 167 // "gc_time_limit_was_exceeded" has an undefined meaning. | |
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168 HeapWord* mem_allocate(size_t size, |
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169 bool* gc_overhead_limit_was_exceeded); |
| 0 | 170 |
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171 // Allocation attempt(s) during a safepoint. It should never be called |
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172 // to allocate a new TLAB as this allocation might be satisfied out |
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173 // of the old generation. |
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174 HeapWord* failed_mem_allocate(size_t size); |
| 0 | 175 |
| 176 // Support for System.gc() | |
| 177 void collect(GCCause::Cause cause); | |
| 178 | |
| 179 // These also should be called by the vm thread at a safepoint (e.g., from a | |
| 180 // VM operation). | |
| 181 // | |
| 182 // The first collects the young generation only, unless the scavenge fails; it | |
| 183 // will then attempt a full gc. The second collects the entire heap; if | |
| 184 // maximum_compaction is true, it will compact everything and clear all soft | |
| 185 // references. | |
| 186 inline void invoke_scavenge(); | |
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187 |
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188 // Perform a full collection |
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189 virtual void do_full_collection(bool clear_all_soft_refs); |
| 0 | 190 |
| 191 bool supports_inline_contig_alloc() const { return !UseNUMA; } | |
| 141 | 192 |
| 193 HeapWord** top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord**)-1; } | |
| 194 HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : (HeapWord**)-1; } | |
| 0 | 195 |
| 196 void ensure_parsability(bool retire_tlabs); | |
| 197 void accumulate_statistics_all_tlabs(); | |
| 198 void resize_all_tlabs(); | |
| 199 | |
| 200 size_t unsafe_max_alloc(); | |
| 201 | |
| 202 bool supports_tlab_allocation() const { return true; } | |
| 203 | |
| 204 size_t tlab_capacity(Thread* thr) const; | |
| 205 size_t unsafe_max_tlab_alloc(Thread* thr) const; | |
| 206 | |
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207 // Can a compiler initialize a new object without store barriers? |
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208 // This permission only extends from the creation of a new object |
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209 // via a TLAB up to the first subsequent safepoint. |
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210 virtual bool can_elide_tlab_store_barriers() const { |
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211 return true; |
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212 } |
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213 |
| 1166 | 214 virtual bool card_mark_must_follow_store() const { |
| 215 return false; | |
| 216 } | |
| 217 | |
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218 // Return true if we don't we need a store barrier for |
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219 // initializing stores to an object at this address. |
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220 virtual bool can_elide_initializing_store_barrier(oop new_obj); |
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221 |
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222 void oop_iterate(ExtendedOopClosure* cl); |
| 0 | 223 void object_iterate(ObjectClosure* cl); |
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224 void safe_object_iterate(ObjectClosure* cl) { object_iterate(cl); } |
| 0 | 225 |
| 226 HeapWord* block_start(const void* addr) const; | |
| 227 size_t block_size(const HeapWord* addr) const; | |
| 228 bool block_is_obj(const HeapWord* addr) const; | |
| 229 | |
| 230 jlong millis_since_last_gc(); | |
| 231 | |
| 232 void prepare_for_verify(); | |
| 10405 | 233 PSHeapSummary create_ps_heap_summary(); |
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234 virtual void print_on(outputStream* st) const; |
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235 virtual void print_on_error(outputStream* st) const; |
| 0 | 236 virtual void print_gc_threads_on(outputStream* st) const; |
| 237 virtual void gc_threads_do(ThreadClosure* tc) const; | |
| 238 virtual void print_tracing_info() const; | |
| 239 | |
| 6008 | 240 void verify(bool silent, VerifyOption option /* ignored */); |
| 0 | 241 |
| 242 void print_heap_change(size_t prev_used); | |
| 243 | |
| 244 // Resize the young generation. The reserved space for the | |
| 245 // generation may be expanded in preparation for the resize. | |
| 246 void resize_young_gen(size_t eden_size, size_t survivor_size); | |
| 247 | |
| 248 // Resize the old generation. The reserved space for the | |
| 249 // generation may be expanded in preparation for the resize. | |
| 250 void resize_old_gen(size_t desired_free_space); | |
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251 |
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252 // Save the tops of the spaces in all generations |
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253 void record_gen_tops_before_GC() PRODUCT_RETURN; |
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254 |
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255 // Mangle the unused parts of all spaces in the heap |
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256 void gen_mangle_unused_area() PRODUCT_RETURN; |
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257 |
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258 // Call these in sequential code around the processing of strong roots. |
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259 class ParStrongRootsScope : public MarkingCodeBlobClosure::MarkScope { |
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260 public: |
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261 ParStrongRootsScope(); |
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262 ~ParStrongRootsScope(); |
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263 }; |
| 0 | 264 }; |
| 265 | |
| 266 inline size_t ParallelScavengeHeap::set_alignment(size_t& var, size_t val) | |
| 267 { | |
| 268 assert(is_power_of_2((intptr_t)val), "must be a power of 2"); | |
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269 var = round_to(val, intra_heap_alignment()); |
| 0 | 270 return var; |
| 271 } | |
| 1972 | 272 |
| 273 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARALLELSCAVENGEHEAP_HPP |