94
95 CollectorPolicy();
96
97 public:
98 virtual void initialize_all() {
99 initialize_alignments();
100 initialize_flags();
101 initialize_size_info();
102 }
103
104 // Return maximum heap alignment that may be imposed by the policy.
105 static size_t compute_heap_alignment();
106
107 size_t space_alignment() { return _space_alignment; }
108 size_t heap_alignment() { return _heap_alignment; }
109
110 size_t initial_heap_byte_size() { return _initial_heap_byte_size; }
111 size_t max_heap_byte_size() { return _max_heap_byte_size; }
112 size_t min_heap_byte_size() { return _min_heap_byte_size; }
113
114 enum Name {
115 CollectorPolicyKind,
116 GenCollectorPolicyKind,
117 ConcurrentMarkSweepPolicyKind,
118 G1CollectorPolicyKind
119 };
120
121 AdaptiveSizePolicy* size_policy() { return _size_policy; }
122 bool should_clear_all_soft_refs() { return _should_clear_all_soft_refs; }
123 void set_should_clear_all_soft_refs(bool v) { _should_clear_all_soft_refs = v; }
124 // Returns the current value of _should_clear_all_soft_refs.
125 // _should_clear_all_soft_refs is set to false as a side effect.
126 bool use_should_clear_all_soft_refs(bool v);
127 bool all_soft_refs_clear() { return _all_soft_refs_clear; }
128 void set_all_soft_refs_clear(bool v) { _all_soft_refs_clear = v; }
129
130 // Called by the GC after Soft Refs have been cleared to indicate
131 // that the request in _should_clear_all_soft_refs has been fulfilled.
132 void cleared_all_soft_refs();
133
134 // Identification methods.
135 virtual GenCollectorPolicy* as_generation_policy() { return NULL; }
136 virtual MarkSweepPolicy* as_mark_sweep_policy() { return NULL; }
137 #if INCLUDE_ALL_GCS
138 virtual ConcurrentMarkSweepPolicy* as_concurrent_mark_sweep_policy() { return NULL; }
139 virtual G1CollectorPolicy* as_g1_policy() { return NULL; }
140 #endif // INCLUDE_ALL_GCS
163 bool* gc_overhead_limit_was_exceeded) = 0;
164
165 // This method controls how a collector handles one or more
166 // of its generations being fully allocated.
167 virtual HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab) = 0;
168 // This method controls how a collector handles a metadata allocation
169 // failure.
170 virtual MetaWord* satisfy_failed_metadata_allocation(ClassLoaderData* loader_data,
171 size_t size,
172 Metaspace::MetadataType mdtype);
173
174 // Performance Counter support
175 GCPolicyCounters* counters() { return _gc_policy_counters; }
176
177 // Create the jstat counters for the GC policy. By default, policy's
178 // don't have associated counters, and we complain if this is invoked.
179 virtual void initialize_gc_policy_counters() {
180 ShouldNotReachHere();
181 }
182
183 virtual CollectorPolicy::Name kind() {
184 return CollectorPolicy::CollectorPolicyKind;
185 }
186
187 // Do any updates required to global flags that are due to heap initialization
188 // changes
189 virtual void post_heap_initialize() = 0;
190 };
191
192 class ClearedAllSoftRefs : public StackObj {
193 bool _clear_all_soft_refs;
194 CollectorPolicy* _collector_policy;
195 public:
196 ClearedAllSoftRefs(bool clear_all_soft_refs,
197 CollectorPolicy* collector_policy) :
198 _clear_all_soft_refs(clear_all_soft_refs),
199 _collector_policy(collector_policy) {}
200
201 ~ClearedAllSoftRefs() {
202 if (_clear_all_soft_refs) {
203 _collector_policy->cleared_all_soft_refs();
204 }
205 }
206 };
278 initialize_generations();
279 }
280
281 size_t young_gen_size_lower_bound();
282
283 size_t old_gen_size_lower_bound();
284
285 HeapWord* mem_allocate_work(size_t size,
286 bool is_tlab,
287 bool* gc_overhead_limit_was_exceeded);
288
289 HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab);
290
291 // Adaptive size policy
292 virtual void initialize_size_policy(size_t init_eden_size,
293 size_t init_promo_size,
294 size_t init_survivor_size);
295
296 virtual void post_heap_initialize() {
297 assert(_max_young_size == MaxNewSize, "Should be taken care of by initialize_size_info");
298 }
299
300 virtual CollectorPolicy::Name kind() {
301 return CollectorPolicy::GenCollectorPolicyKind;
302 }
303 };
304
305 class MarkSweepPolicy : public GenCollectorPolicy {
306 protected:
307 void initialize_alignments();
308 void initialize_generations();
309
310 public:
311 MarkSweepPolicy() {}
312
313 MarkSweepPolicy* as_mark_sweep_policy() { return this; }
314
315 void initialize_gc_policy_counters();
316 };
317
318 #endif // SHARE_VM_GC_SHARED_COLLECTORPOLICY_HPP
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94
95 CollectorPolicy();
96
97 public:
98 virtual void initialize_all() {
99 initialize_alignments();
100 initialize_flags();
101 initialize_size_info();
102 }
103
104 // Return maximum heap alignment that may be imposed by the policy.
105 static size_t compute_heap_alignment();
106
107 size_t space_alignment() { return _space_alignment; }
108 size_t heap_alignment() { return _heap_alignment; }
109
110 size_t initial_heap_byte_size() { return _initial_heap_byte_size; }
111 size_t max_heap_byte_size() { return _max_heap_byte_size; }
112 size_t min_heap_byte_size() { return _min_heap_byte_size; }
113
114 AdaptiveSizePolicy* size_policy() { return _size_policy; }
115 bool should_clear_all_soft_refs() { return _should_clear_all_soft_refs; }
116 void set_should_clear_all_soft_refs(bool v) { _should_clear_all_soft_refs = v; }
117 // Returns the current value of _should_clear_all_soft_refs.
118 // _should_clear_all_soft_refs is set to false as a side effect.
119 bool use_should_clear_all_soft_refs(bool v);
120 bool all_soft_refs_clear() { return _all_soft_refs_clear; }
121 void set_all_soft_refs_clear(bool v) { _all_soft_refs_clear = v; }
122
123 // Called by the GC after Soft Refs have been cleared to indicate
124 // that the request in _should_clear_all_soft_refs has been fulfilled.
125 void cleared_all_soft_refs();
126
127 // Identification methods.
128 virtual GenCollectorPolicy* as_generation_policy() { return NULL; }
129 virtual MarkSweepPolicy* as_mark_sweep_policy() { return NULL; }
130 #if INCLUDE_ALL_GCS
131 virtual ConcurrentMarkSweepPolicy* as_concurrent_mark_sweep_policy() { return NULL; }
132 virtual G1CollectorPolicy* as_g1_policy() { return NULL; }
133 #endif // INCLUDE_ALL_GCS
156 bool* gc_overhead_limit_was_exceeded) = 0;
157
158 // This method controls how a collector handles one or more
159 // of its generations being fully allocated.
160 virtual HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab) = 0;
161 // This method controls how a collector handles a metadata allocation
162 // failure.
163 virtual MetaWord* satisfy_failed_metadata_allocation(ClassLoaderData* loader_data,
164 size_t size,
165 Metaspace::MetadataType mdtype);
166
167 // Performance Counter support
168 GCPolicyCounters* counters() { return _gc_policy_counters; }
169
170 // Create the jstat counters for the GC policy. By default, policy's
171 // don't have associated counters, and we complain if this is invoked.
172 virtual void initialize_gc_policy_counters() {
173 ShouldNotReachHere();
174 }
175
176 // Do any updates required to global flags that are due to heap initialization
177 // changes
178 virtual void post_heap_initialize() = 0;
179 };
180
181 class ClearedAllSoftRefs : public StackObj {
182 bool _clear_all_soft_refs;
183 CollectorPolicy* _collector_policy;
184 public:
185 ClearedAllSoftRefs(bool clear_all_soft_refs,
186 CollectorPolicy* collector_policy) :
187 _clear_all_soft_refs(clear_all_soft_refs),
188 _collector_policy(collector_policy) {}
189
190 ~ClearedAllSoftRefs() {
191 if (_clear_all_soft_refs) {
192 _collector_policy->cleared_all_soft_refs();
193 }
194 }
195 };
267 initialize_generations();
268 }
269
270 size_t young_gen_size_lower_bound();
271
272 size_t old_gen_size_lower_bound();
273
274 HeapWord* mem_allocate_work(size_t size,
275 bool is_tlab,
276 bool* gc_overhead_limit_was_exceeded);
277
278 HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab);
279
280 // Adaptive size policy
281 virtual void initialize_size_policy(size_t init_eden_size,
282 size_t init_promo_size,
283 size_t init_survivor_size);
284
285 virtual void post_heap_initialize() {
286 assert(_max_young_size == MaxNewSize, "Should be taken care of by initialize_size_info");
287 }
288 };
289
290 class MarkSweepPolicy : public GenCollectorPolicy {
291 protected:
292 void initialize_alignments();
293 void initialize_generations();
294
295 public:
296 MarkSweepPolicy() {}
297
298 MarkSweepPolicy* as_mark_sweep_policy() { return this; }
299
300 void initialize_gc_policy_counters();
301 };
302
303 #endif // SHARE_VM_GC_SHARED_COLLECTORPOLICY_HPP
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