Mercurial > hg > truffle
annotate src/share/vm/memory/collectorPolicy.hpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | 183f41cf8bfe |
| children | 1ee8caae33af |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 2001-2008 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // This class (or more correctly, subtypes of this class) | |
| 26 // are used to define global garbage collector attributes. | |
| 27 // This includes initialization of generations and any other | |
| 28 // shared resources they may need. | |
| 29 // | |
| 30 // In general, all flag adjustment and validation should be | |
| 31 // done in initialize_flags(), which is called prior to | |
| 32 // initialize_size_info(). | |
| 33 // | |
| 34 // This class is not fully developed yet. As more collector(s) | |
| 35 // are added, it is expected that we will come across further | |
| 36 // behavior that requires global attention. The correct place | |
| 37 // to deal with those issues is this class. | |
| 38 | |
| 39 // Forward declarations. | |
| 40 class GenCollectorPolicy; | |
| 41 class TwoGenerationCollectorPolicy; | |
| 42 #ifndef SERIALGC | |
| 43 class ConcurrentMarkSweepPolicy; | |
| 44 #endif // SERIALGC | |
| 45 class AdaptiveSizePolicy; | |
| 46 class GCPolicyCounters; | |
| 47 class PermanentGenerationSpec; | |
| 48 class MarkSweepPolicy; | |
| 49 | |
| 50 class CollectorPolicy : public CHeapObj { | |
| 51 protected: | |
| 52 PermanentGenerationSpec *_permanent_generation; | |
| 53 GCPolicyCounters* _gc_policy_counters; | |
| 54 | |
| 55 // Requires that the concrete subclass sets the alignment constraints | |
| 56 // before calling. | |
| 57 virtual void initialize_flags(); | |
| 58 virtual void initialize_size_info() = 0; | |
| 59 // Initialize "_permanent_generation" to a spec for the given kind of | |
| 60 // Perm Gen. | |
| 61 void initialize_perm_generation(PermGen::Name pgnm); | |
| 62 | |
| 63 size_t _initial_heap_byte_size; | |
| 64 size_t _max_heap_byte_size; | |
| 65 size_t _min_heap_byte_size; | |
| 66 | |
| 67 size_t _min_alignment; | |
| 68 size_t _max_alignment; | |
| 69 | |
| 70 CollectorPolicy() : | |
| 71 _min_alignment(1), | |
| 72 _max_alignment(1), | |
| 73 _initial_heap_byte_size(0), | |
| 74 _max_heap_byte_size(0), | |
| 75 _min_heap_byte_size(0) | |
| 76 {} | |
| 77 | |
| 78 public: | |
| 79 void set_min_alignment(size_t align) { _min_alignment = align; } | |
| 80 size_t min_alignment() { return _min_alignment; } | |
| 81 void set_max_alignment(size_t align) { _max_alignment = align; } | |
| 82 size_t max_alignment() { return _max_alignment; } | |
| 83 | |
| 84 size_t initial_heap_byte_size() { return _initial_heap_byte_size; } | |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
85 void set_initial_heap_byte_size(size_t v) { _initial_heap_byte_size = v; } |
| 0 | 86 size_t max_heap_byte_size() { return _max_heap_byte_size; } |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
87 void set_max_heap_byte_size(size_t v) { _max_heap_byte_size = v; } |
| 0 | 88 size_t min_heap_byte_size() { return _min_heap_byte_size; } |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
89 void set_min_heap_byte_size(size_t v) { _min_heap_byte_size = v; } |
| 0 | 90 |
| 91 enum Name { | |
| 92 CollectorPolicyKind, | |
| 93 TwoGenerationCollectorPolicyKind, | |
| 94 TrainPolicyKind, | |
| 95 ConcurrentMarkSweepPolicyKind, | |
| 96 ASConcurrentMarkSweepPolicyKind | |
| 97 }; | |
| 98 | |
| 99 // Identification methods. | |
| 100 virtual GenCollectorPolicy* as_generation_policy() { return NULL; } | |
| 101 virtual TwoGenerationCollectorPolicy* as_two_generation_policy() { return NULL; } | |
| 102 virtual MarkSweepPolicy* as_mark_sweep_policy() { return NULL; } | |
| 103 #ifndef SERIALGC | |
| 104 virtual ConcurrentMarkSweepPolicy* as_concurrent_mark_sweep_policy() { return NULL; } | |
| 105 #endif // SERIALGC | |
| 106 // Note that these are not virtual. | |
| 107 bool is_generation_policy() { return as_generation_policy() != NULL; } | |
| 108 bool is_two_generation_policy() { return as_two_generation_policy() != NULL; } | |
| 109 bool is_mark_sweep_policy() { return as_mark_sweep_policy() != NULL; } | |
| 110 #ifndef SERIALGC | |
| 111 bool is_concurrent_mark_sweep_policy() { return as_concurrent_mark_sweep_policy() != NULL; } | |
| 112 #else // SERIALGC | |
| 113 bool is_concurrent_mark_sweep_policy() { return false; } | |
| 114 #endif // SERIALGC | |
| 115 | |
| 116 virtual PermanentGenerationSpec *permanent_generation() { | |
| 117 assert(_permanent_generation != NULL, "Sanity check"); | |
| 118 return _permanent_generation; | |
| 119 } | |
| 120 | |
| 121 virtual BarrierSet::Name barrier_set_name() = 0; | |
| 122 virtual GenRemSet::Name rem_set_name() = 0; | |
| 123 | |
| 124 // Create the remembered set (to cover the given reserved region, | |
| 125 // allowing breaking up into at most "max_covered_regions"). | |
| 126 virtual GenRemSet* create_rem_set(MemRegion reserved, | |
| 127 int max_covered_regions); | |
| 128 | |
| 129 // This method controls how a collector satisfies a request | |
| 130 // for a block of memory. "gc_time_limit_was_exceeded" will | |
| 131 // be set to true if the adaptive size policy determine that | |
| 132 // an excessive amount of time is being spent doing collections | |
| 133 // and caused a NULL to be returned. If a NULL is not returned, | |
| 134 // "gc_time_limit_was_exceeded" has an undefined meaning. | |
| 135 virtual HeapWord* mem_allocate_work(size_t size, | |
| 136 bool is_tlab, | |
| 137 bool* gc_overhead_limit_was_exceeded) = 0; | |
| 138 | |
| 139 // This method controls how a collector handles one or more | |
| 140 // of its generations being fully allocated. | |
| 141 virtual HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab) = 0; | |
| 142 // Performace Counter support | |
| 143 GCPolicyCounters* counters() { return _gc_policy_counters; } | |
| 144 | |
| 145 // Create the jstat counters for the GC policy. By default, policy's | |
| 146 // don't have associated counters, and we complain if this is invoked. | |
| 147 virtual void initialize_gc_policy_counters() { | |
| 148 ShouldNotReachHere(); | |
| 149 } | |
| 150 | |
| 151 virtual CollectorPolicy::Name kind() { | |
| 152 return CollectorPolicy::CollectorPolicyKind; | |
| 153 } | |
| 154 | |
| 155 // Returns true if a collector has eden space with soft end. | |
| 156 virtual bool has_soft_ended_eden() { | |
| 157 return false; | |
| 158 } | |
| 159 | |
| 160 }; | |
| 161 | |
| 162 class GenCollectorPolicy : public CollectorPolicy { | |
| 163 protected: | |
| 164 size_t _min_gen0_size; | |
| 165 size_t _initial_gen0_size; | |
| 166 size_t _max_gen0_size; | |
| 167 | |
| 168 GenerationSpec **_generations; | |
| 169 | |
| 170 // The sizing of the different generations in the heap are controlled | |
| 171 // by a sizing policy. | |
| 172 AdaptiveSizePolicy* _size_policy; | |
| 173 | |
| 174 // Return true if an allocation should be attempted in the older | |
| 175 // generation if it fails in the younger generation. Return | |
| 176 // false, otherwise. | |
| 177 virtual bool should_try_older_generation_allocation(size_t word_size) const; | |
| 178 | |
| 179 void initialize_flags(); | |
| 180 void initialize_size_info(); | |
| 181 | |
| 182 // Try to allocate space by expanding the heap. | |
| 183 virtual HeapWord* expand_heap_and_allocate(size_t size, bool is_tlab); | |
| 184 | |
| 185 // compute max heap alignment | |
| 186 size_t compute_max_alignment(); | |
| 187 | |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
188 // Scale the base_size by NewRation according to |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
189 // result = base_size / (NewRatio + 1) |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
190 // and align by min_alignment() |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
191 size_t scale_by_NewRatio_aligned(size_t base_size); |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
192 |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
193 // Bound the value by the given maximum minus the |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
194 // min_alignment. |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
195 size_t bound_minus_alignment(size_t desired_size, size_t maximum_size); |
| 0 | 196 |
| 197 public: | |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
198 // Accessors |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
199 size_t min_gen0_size() { return _min_gen0_size; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
200 void set_min_gen0_size(size_t v) { _min_gen0_size = v; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
201 size_t initial_gen0_size() { return _initial_gen0_size; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
202 void set_initial_gen0_size(size_t v) { _initial_gen0_size = v; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
203 size_t max_gen0_size() { return _max_gen0_size; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
204 void set_max_gen0_size(size_t v) { _max_gen0_size = v; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
205 |
| 0 | 206 virtual int number_of_generations() = 0; |
| 207 | |
| 208 virtual GenerationSpec **generations() { | |
| 209 assert(_generations != NULL, "Sanity check"); | |
| 210 return _generations; | |
| 211 } | |
| 212 | |
| 213 virtual GenCollectorPolicy* as_generation_policy() { return this; } | |
| 214 | |
| 215 virtual void initialize_generations() = 0; | |
| 216 | |
| 217 virtual void initialize_all() { | |
| 218 initialize_flags(); | |
| 219 initialize_size_info(); | |
| 220 initialize_generations(); | |
| 221 } | |
| 222 | |
| 223 HeapWord* mem_allocate_work(size_t size, | |
| 224 bool is_tlab, | |
| 225 bool* gc_overhead_limit_was_exceeded); | |
| 226 | |
| 227 HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab); | |
| 228 | |
| 229 // The size that defines a "large array". | |
| 230 virtual size_t large_typearray_limit(); | |
| 231 | |
| 232 // Adaptive size policy | |
| 233 AdaptiveSizePolicy* size_policy() { return _size_policy; } | |
| 234 virtual void initialize_size_policy(size_t init_eden_size, | |
| 235 size_t init_promo_size, | |
| 236 size_t init_survivor_size); | |
| 237 | |
| 238 }; | |
| 239 | |
| 240 | |
| 241 // All of hotspot's current collectors are subtypes of this | |
| 242 // class. Currently, these collectors all use the same gen[0], | |
| 243 // but have different gen[1] types. If we add another subtype | |
| 244 // of CollectorPolicy, this class should be broken out into | |
| 245 // its own file. | |
| 246 | |
| 247 class TwoGenerationCollectorPolicy : public GenCollectorPolicy { | |
| 248 protected: | |
| 249 size_t _min_gen1_size; | |
| 250 size_t _initial_gen1_size; | |
| 251 size_t _max_gen1_size; | |
| 252 | |
| 253 void initialize_flags(); | |
| 254 void initialize_size_info(); | |
| 255 void initialize_generations() { ShouldNotReachHere(); } | |
| 256 | |
| 257 public: | |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
258 // Accessors |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
259 size_t min_gen1_size() { return _min_gen1_size; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
260 void set_min_gen1_size(size_t v) { _min_gen1_size = v; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
261 size_t initial_gen1_size() { return _initial_gen1_size; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
262 void set_initial_gen1_size(size_t v) { _initial_gen1_size = v; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
263 size_t max_gen1_size() { return _max_gen1_size; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
264 void set_max_gen1_size(size_t v) { _max_gen1_size = v; } |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
265 |
| 0 | 266 // Inherited methods |
| 267 TwoGenerationCollectorPolicy* as_two_generation_policy() { return this; } | |
| 268 | |
| 269 int number_of_generations() { return 2; } | |
| 270 BarrierSet::Name barrier_set_name() { return BarrierSet::CardTableModRef; } | |
| 271 GenRemSet::Name rem_set_name() { return GenRemSet::CardTable; } | |
| 272 | |
| 273 virtual CollectorPolicy::Name kind() { | |
| 274 return CollectorPolicy::TwoGenerationCollectorPolicyKind; | |
| 275 } | |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
276 |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
277 // Returns true is gen0 sizes were adjusted |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
278 bool adjust_gen0_sizes(size_t* gen0_size_ptr, size_t* gen1_size_ptr, |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
279 size_t heap_size, size_t min_gen1_size); |
| 0 | 280 }; |
| 281 | |
| 282 class MarkSweepPolicy : public TwoGenerationCollectorPolicy { | |
| 283 protected: | |
| 284 void initialize_generations(); | |
| 285 | |
| 286 public: | |
| 287 MarkSweepPolicy(); | |
| 288 | |
| 289 MarkSweepPolicy* as_mark_sweep_policy() { return this; } | |
| 290 | |
| 291 void initialize_gc_policy_counters(); | |
| 292 }; |