37 // Note: all sizes are in oops
38
39 class ageTable VALUE_OBJ_CLASS_SPEC {
40 friend class VMStructs;
41
42 public:
43 // constants
44 enum { table_size = markOopDesc::max_age + 1 };
45
46 // instance variables
47 size_t sizes[table_size];
48
49 // constructor. "global" indicates that this is the global age table
50 // (as opposed to gc-thread-local)
51 ageTable(bool global = true);
52
53 // clear table
54 void clear();
55
56 // add entry
57 void add(oop p, size_t oop_size) {
58 uint age = p->age();
59 assert(age > 0 && age < table_size, "invalid age of object");
60 sizes[age] += oop_size;
61 }
62
63 // Merge another age table with the current one. Used
64 // for parallel young generation gc.
65 void merge(ageTable* subTable);
66 void merge_par(ageTable* subTable);
67
68 // calculate new tenuring threshold based on age information
69 uint compute_tenuring_threshold(size_t survivor_capacity);
70
71 private:
72 PerfVariable* _perf_sizes[table_size];
73 };
74
75 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP
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37 // Note: all sizes are in oops
38
39 class ageTable VALUE_OBJ_CLASS_SPEC {
40 friend class VMStructs;
41
42 public:
43 // constants
44 enum { table_size = markOopDesc::max_age + 1 };
45
46 // instance variables
47 size_t sizes[table_size];
48
49 // constructor. "global" indicates that this is the global age table
50 // (as opposed to gc-thread-local)
51 ageTable(bool global = true);
52
53 // clear table
54 void clear();
55
56 // add entry
57 void add(const oop p, const size_t oop_size) {
58 add(p->age(), oop_size);
59 }
60
61 void add(const uint age, const size_t oop_size) {
62 assert(age > 0 && age < table_size, "invalid age of object");
63 sizes[age] += oop_size;
64 }
65
66 // Merge another age table with the current one. Used
67 // for parallel young generation gc.
68 void merge(ageTable* subTable);
69 void merge_par(ageTable* subTable);
70
71 // calculate new tenuring threshold based on age information
72 uint compute_tenuring_threshold(size_t survivor_capacity);
73
74 private:
75 PerfVariable* _perf_sizes[table_size];
76 };
77
78 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP
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