55
56 class GCPolicyCounters;
57 class MarkSweepPolicy;
58
59 class CollectorPolicy : public CHeapObj<mtGC> {
60 protected:
61 virtual void initialize_alignments() = 0;
62 virtual void initialize_flags();
63 virtual void initialize_size_info();
64
65 DEBUG_ONLY(virtual void assert_flags();)
66 DEBUG_ONLY(virtual void assert_size_info();)
67
68 size_t _initial_heap_byte_size;
69 size_t _max_heap_byte_size;
70 size_t _min_heap_byte_size;
71
72 size_t _space_alignment;
73 size_t _heap_alignment;
74
75 // Set to true when policy wants soft refs cleared.
76 // Reset to false by gc after it clears all soft refs.
77 bool _should_clear_all_soft_refs;
78
79 // Set to true by the GC if the just-completed gc cleared all
80 // softrefs. This is set to true whenever a gc clears all softrefs, and
81 // set to false each time gc returns to the mutator. For example, in the
82 // ParallelScavengeHeap case the latter would be done toward the end of
83 // mem_allocate() where it returns op.result()
84 bool _all_soft_refs_clear;
85
86 CollectorPolicy();
87
88 public:
89 virtual void initialize_all() {
90 initialize_alignments();
91 initialize_flags();
92 initialize_size_info();
93 }
94
95 // Return maximum heap alignment that may be imposed by the policy.
96 static size_t compute_heap_alignment();
97
98 size_t space_alignment() { return _space_alignment; }
99 size_t heap_alignment() { return _heap_alignment; }
100
101 size_t initial_heap_byte_size() { return _initial_heap_byte_size; }
102 size_t max_heap_byte_size() { return _max_heap_byte_size; }
103 size_t min_heap_byte_size() { return _min_heap_byte_size; }
104
105 bool should_clear_all_soft_refs() { return _should_clear_all_soft_refs; }
106 void set_should_clear_all_soft_refs(bool v) { _should_clear_all_soft_refs = v; }
107 // Returns the current value of _should_clear_all_soft_refs.
108 // _should_clear_all_soft_refs is set to false as a side effect.
109 bool use_should_clear_all_soft_refs(bool v);
110 bool all_soft_refs_clear() { return _all_soft_refs_clear; }
111 void set_all_soft_refs_clear(bool v) { _all_soft_refs_clear = v; }
112
113 // Called by the GC after Soft Refs have been cleared to indicate
114 // that the request in _should_clear_all_soft_refs has been fulfilled.
115 virtual void cleared_all_soft_refs();
116 };
117
118 class ClearedAllSoftRefs : public StackObj {
119 bool _clear_all_soft_refs;
120 CollectorPolicy* _collector_policy;
121 public:
122 ClearedAllSoftRefs(bool clear_all_soft_refs,
123 CollectorPolicy* collector_policy) :
124 _clear_all_soft_refs(clear_all_soft_refs),
125 _collector_policy(collector_policy) {}
126
127 ~ClearedAllSoftRefs() {
128 if (_clear_all_soft_refs) {
129 _collector_policy->cleared_all_soft_refs();
130 }
131 }
132
133 bool should_clear() { return _clear_all_soft_refs; }
134 };
135
136 class GenCollectorPolicy : public CollectorPolicy {
137 friend class TestGenCollectorPolicy;
138 friend class VMStructs;
139
140 protected:
141 size_t _min_young_size;
142 size_t _initial_young_size;
143 size_t _max_young_size;
144 size_t _min_old_size;
145 size_t _initial_old_size;
146 size_t _max_old_size;
147
148 // _gen_alignment and _space_alignment will have the same value most of the
149 // time. When using large pages they can differ.
150 size_t _gen_alignment;
151
152 GenerationSpec* _young_gen_spec;
153 GenerationSpec* _old_gen_spec;
202 // Create the jstat counters for the GC policy.
203 virtual void initialize_gc_policy_counters() = 0;
204
205 virtual void initialize_generations() { };
206
207 virtual void initialize_all() {
208 CollectorPolicy::initialize_all();
209 initialize_generations();
210 }
211
212 size_t young_gen_size_lower_bound();
213
214 size_t old_gen_size_lower_bound();
215
216 // Adaptive size policy
217 AdaptiveSizePolicy* size_policy() { return _size_policy; }
218
219 virtual void initialize_size_policy(size_t init_eden_size,
220 size_t init_promo_size,
221 size_t init_survivor_size);
222
223 virtual void cleared_all_soft_refs();
224
225 };
226
227 class MarkSweepPolicy : public GenCollectorPolicy {
228 protected:
229 void initialize_alignments();
230 void initialize_generations();
231
232 public:
233 MarkSweepPolicy() {}
234
235 void initialize_gc_policy_counters();
236 };
237
238 #endif // SHARE_VM_GC_SHARED_COLLECTORPOLICY_HPP
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55
56 class GCPolicyCounters;
57 class MarkSweepPolicy;
58
59 class CollectorPolicy : public CHeapObj<mtGC> {
60 protected:
61 virtual void initialize_alignments() = 0;
62 virtual void initialize_flags();
63 virtual void initialize_size_info();
64
65 DEBUG_ONLY(virtual void assert_flags();)
66 DEBUG_ONLY(virtual void assert_size_info();)
67
68 size_t _initial_heap_byte_size;
69 size_t _max_heap_byte_size;
70 size_t _min_heap_byte_size;
71
72 size_t _space_alignment;
73 size_t _heap_alignment;
74
75 CollectorPolicy();
76
77 public:
78 virtual void initialize_all() {
79 initialize_alignments();
80 initialize_flags();
81 initialize_size_info();
82 }
83
84 // Return maximum heap alignment that may be imposed by the policy.
85 static size_t compute_heap_alignment();
86
87 size_t space_alignment() { return _space_alignment; }
88 size_t heap_alignment() { return _heap_alignment; }
89
90 size_t initial_heap_byte_size() { return _initial_heap_byte_size; }
91 size_t max_heap_byte_size() { return _max_heap_byte_size; }
92 size_t min_heap_byte_size() { return _min_heap_byte_size; }
93 };
94
95 class GenCollectorPolicy : public CollectorPolicy {
96 friend class TestGenCollectorPolicy;
97 friend class VMStructs;
98
99 protected:
100 size_t _min_young_size;
101 size_t _initial_young_size;
102 size_t _max_young_size;
103 size_t _min_old_size;
104 size_t _initial_old_size;
105 size_t _max_old_size;
106
107 // _gen_alignment and _space_alignment will have the same value most of the
108 // time. When using large pages they can differ.
109 size_t _gen_alignment;
110
111 GenerationSpec* _young_gen_spec;
112 GenerationSpec* _old_gen_spec;
161 // Create the jstat counters for the GC policy.
162 virtual void initialize_gc_policy_counters() = 0;
163
164 virtual void initialize_generations() { };
165
166 virtual void initialize_all() {
167 CollectorPolicy::initialize_all();
168 initialize_generations();
169 }
170
171 size_t young_gen_size_lower_bound();
172
173 size_t old_gen_size_lower_bound();
174
175 // Adaptive size policy
176 AdaptiveSizePolicy* size_policy() { return _size_policy; }
177
178 virtual void initialize_size_policy(size_t init_eden_size,
179 size_t init_promo_size,
180 size_t init_survivor_size);
181 };
182
183 class MarkSweepPolicy : public GenCollectorPolicy {
184 protected:
185 void initialize_alignments();
186 void initialize_generations();
187
188 public:
189 MarkSweepPolicy() {}
190
191 void initialize_gc_policy_counters();
192 };
193
194 #endif // SHARE_VM_GC_SHARED_COLLECTORPOLICY_HPP
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