96 return region / _regions_per_page;
97 }
98
99 public:
100 G1RegionsSmallerThanCommitSizeMapper(ReservedSpace rs,
101 size_t actual_size,
102 size_t page_size,
103 size_t alloc_granularity,
104 size_t commit_factor,
105 MemoryType type) :
106 G1RegionToSpaceMapper(rs, actual_size, page_size, alloc_granularity, type),
107 _regions_per_page((page_size * commit_factor) / alloc_granularity), _refcounts() {
108
109 guarantee((page_size * commit_factor) >= alloc_granularity, "allocation granularity smaller than commit granularity");
110 _refcounts.initialize((HeapWord*)rs.base(), (HeapWord*)(rs.base() + align_size_up(rs.size(), page_size)), page_size);
111 _commit_map.resize(rs.size() * commit_factor / alloc_granularity, /* in_resource_area */ false);
112 }
113
114 virtual void commit_regions(uint start_idx, size_t num_regions) {
115 for (uint i = start_idx; i < start_idx + num_regions; i++) {
116 assert(!_commit_map.at(i), err_msg("Trying to commit storage at region %u that is already committed", i));
117 size_t idx = region_idx_to_page_idx(i);
118 uint old_refcount = _refcounts.get_by_index(idx);
119 bool zero_filled = false;
120 if (old_refcount == 0) {
121 zero_filled = _storage.commit(idx, 1);
122 }
123 _refcounts.set_by_index(idx, old_refcount + 1);
124 _commit_map.set_bit(i);
125 fire_on_commit(i, 1, zero_filled);
126 }
127 }
128
129 virtual void uncommit_regions(uint start_idx, size_t num_regions) {
130 for (uint i = start_idx; i < start_idx + num_regions; i++) {
131 assert(_commit_map.at(i), err_msg("Trying to uncommit storage at region %u that is not committed", i));
132 size_t idx = region_idx_to_page_idx(i);
133 uint old_refcount = _refcounts.get_by_index(idx);
134 assert(old_refcount > 0, "must be");
135 if (old_refcount == 1) {
136 _storage.uncommit(idx, 1);
137 }
138 _refcounts.set_by_index(idx, old_refcount - 1);
139 _commit_map.clear_bit(i);
140 }
141 }
142 };
143
144 void G1RegionToSpaceMapper::fire_on_commit(uint start_idx, size_t num_regions, bool zero_filled) {
145 if (_listener != NULL) {
146 _listener->on_commit(start_idx, num_regions, zero_filled);
147 }
148 }
149
150 G1RegionToSpaceMapper* G1RegionToSpaceMapper::create_mapper(ReservedSpace rs,
151 size_t actual_size,
|
96 return region / _regions_per_page;
97 }
98
99 public:
100 G1RegionsSmallerThanCommitSizeMapper(ReservedSpace rs,
101 size_t actual_size,
102 size_t page_size,
103 size_t alloc_granularity,
104 size_t commit_factor,
105 MemoryType type) :
106 G1RegionToSpaceMapper(rs, actual_size, page_size, alloc_granularity, type),
107 _regions_per_page((page_size * commit_factor) / alloc_granularity), _refcounts() {
108
109 guarantee((page_size * commit_factor) >= alloc_granularity, "allocation granularity smaller than commit granularity");
110 _refcounts.initialize((HeapWord*)rs.base(), (HeapWord*)(rs.base() + align_size_up(rs.size(), page_size)), page_size);
111 _commit_map.resize(rs.size() * commit_factor / alloc_granularity, /* in_resource_area */ false);
112 }
113
114 virtual void commit_regions(uint start_idx, size_t num_regions) {
115 for (uint i = start_idx; i < start_idx + num_regions; i++) {
116 assert(!_commit_map.at(i), "Trying to commit storage at region %u that is already committed", i);
117 size_t idx = region_idx_to_page_idx(i);
118 uint old_refcount = _refcounts.get_by_index(idx);
119 bool zero_filled = false;
120 if (old_refcount == 0) {
121 zero_filled = _storage.commit(idx, 1);
122 }
123 _refcounts.set_by_index(idx, old_refcount + 1);
124 _commit_map.set_bit(i);
125 fire_on_commit(i, 1, zero_filled);
126 }
127 }
128
129 virtual void uncommit_regions(uint start_idx, size_t num_regions) {
130 for (uint i = start_idx; i < start_idx + num_regions; i++) {
131 assert(_commit_map.at(i), "Trying to uncommit storage at region %u that is not committed", i);
132 size_t idx = region_idx_to_page_idx(i);
133 uint old_refcount = _refcounts.get_by_index(idx);
134 assert(old_refcount > 0, "must be");
135 if (old_refcount == 1) {
136 _storage.uncommit(idx, 1);
137 }
138 _refcounts.set_by_index(idx, old_refcount - 1);
139 _commit_map.clear_bit(i);
140 }
141 }
142 };
143
144 void G1RegionToSpaceMapper::fire_on_commit(uint start_idx, size_t num_regions, bool zero_filled) {
145 if (_listener != NULL) {
146 _listener->on_commit(start_idx, num_regions, zero_filled);
147 }
148 }
149
150 G1RegionToSpaceMapper* G1RegionToSpaceMapper::create_mapper(ReservedSpace rs,
151 size_t actual_size,
|