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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_GC_G1_G1REGIONTOSPACEMAPPER_HPP
26 #define SHARE_GC_G1_G1REGIONTOSPACEMAPPER_HPP
27
28 #include "gc/g1/g1PageBasedVirtualSpace.hpp"
29 #include "memory/allocation.hpp"
30 #include "utilities/debug.hpp"
31
32 class WorkGang;
33
34 class G1MappingChangedListener {
35 public:
36 // Fired after commit of the memory, i.e. the memory this listener is registered
37 // for can be accessed.
38 // Zero_filled indicates that the memory can be considered as filled with zero bytes
39 // when called.
40 virtual void on_commit(uint start_idx, size_t num_regions, bool zero_filled) = 0;
41 };
42
43 // Maps region based commit/uncommit requests to the underlying page sized virtual
44 // space.
45 class G1RegionToSpaceMapper : public CHeapObj<mtGC> {
46 private:
47 G1MappingChangedListener* _listener;
54 CHeapBitMap _commit_map;
55
56 G1RegionToSpaceMapper(ReservedSpace rs, size_t used_size, size_t page_size, size_t region_granularity, size_t commit_factor, MemoryType type);
57
58 void fire_on_commit(uint start_idx, size_t num_regions, bool zero_filled);
59 public:
60 MemRegion reserved() { return _storage.reserved(); }
61
62 size_t reserved_size() { return _storage.reserved_size(); }
63 size_t committed_size() { return _storage.committed_size(); }
64
65 void set_mapping_changed_listener(G1MappingChangedListener* listener) { _listener = listener; }
66
67 virtual ~G1RegionToSpaceMapper() {}
68
69 bool is_committed(uintptr_t idx) const {
70 return _commit_map.at(idx);
71 }
72
73 void commit_and_set_special();
74 virtual void commit_regions(uint start_idx, size_t num_regions = 1, WorkGang* pretouch_workers = NULL) = 0;
75 virtual void uncommit_regions(uint start_idx, size_t num_regions = 1) = 0;
76
77 // Creates an appropriate G1RegionToSpaceMapper for the given parameters.
78 // The actual space to be used within the given reservation is given by actual_size.
79 // This is because some OSes need to round up the reservation size to guarantee
80 // alignment of page_size.
81 // The byte_translation_factor defines how many bytes in a region correspond to
82 // a single byte in the data structure this mapper is for.
83 // Eg. in the card table, this value corresponds to the size a single card
84 // table entry corresponds to in the heap.
85 static G1RegionToSpaceMapper* create_mapper(ReservedSpace rs,
86 size_t actual_size,
87 size_t page_size,
88 size_t region_granularity,
89 size_t byte_translation_factor,
90 MemoryType type);
91
92 static G1RegionToSpaceMapper* create_heap_mapper(ReservedSpace rs,
93 size_t actual_size,
94 size_t page_size,
99
100 // G1RegionToSpaceMapper implementation where
101 // part of space is mapped to dram and part to nv-dimm
102 class G1RegionToHeteroSpaceMapper : public G1RegionToSpaceMapper {
103 private:
104 ReservedSpace _rs;
105 G1RegionToSpaceMapper* _dram_mapper;
106 uint _num_committed_dram;
107 uint _num_committed_nvdimm;
108 uint _start_index_of_dram;
109 size_t _page_size;
110 size_t _commit_factor;
111 MemoryType _type;
112
113 public:
114 G1RegionToHeteroSpaceMapper(ReservedSpace rs, size_t used_size, size_t page_size, size_t region_granularity, size_t commit_factor, MemoryType type);
115 bool initialize();
116 uint num_committed_dram() const;
117 uint num_committed_nvdimm() const;
118
119 virtual void commit_regions(uint start_idx, size_t num_regions = 1, WorkGang* pretouch_workers = NULL);
120 virtual void uncommit_regions(uint start_idx, size_t num_regions = 1);
121 };
122 #endif // SHARE_GC_G1_G1REGIONTOSPACEMAPPER_HPP
|
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_GC_G1_G1REGIONTOSPACEMAPPER_HPP
26 #define SHARE_GC_G1_G1REGIONTOSPACEMAPPER_HPP
27
28 #include "gc/g1/g1MemoryNodeManager.hpp"
29 #include "gc/g1/g1PageBasedVirtualSpace.hpp"
30 #include "memory/allocation.hpp"
31 #include "utilities/debug.hpp"
32
33 class WorkGang;
34
35 class G1MappingChangedListener {
36 public:
37 // Fired after commit of the memory, i.e. the memory this listener is registered
38 // for can be accessed.
39 // Zero_filled indicates that the memory can be considered as filled with zero bytes
40 // when called.
41 virtual void on_commit(uint start_idx, size_t num_regions, bool zero_filled) = 0;
42 };
43
44 // Maps region based commit/uncommit requests to the underlying page sized virtual
45 // space.
46 class G1RegionToSpaceMapper : public CHeapObj<mtGC> {
47 private:
48 G1MappingChangedListener* _listener;
55 CHeapBitMap _commit_map;
56
57 G1RegionToSpaceMapper(ReservedSpace rs, size_t used_size, size_t page_size, size_t region_granularity, size_t commit_factor, MemoryType type);
58
59 void fire_on_commit(uint start_idx, size_t num_regions, bool zero_filled);
60 public:
61 MemRegion reserved() { return _storage.reserved(); }
62
63 size_t reserved_size() { return _storage.reserved_size(); }
64 size_t committed_size() { return _storage.committed_size(); }
65
66 void set_mapping_changed_listener(G1MappingChangedListener* listener) { _listener = listener; }
67
68 virtual ~G1RegionToSpaceMapper() {}
69
70 bool is_committed(uintptr_t idx) const {
71 return _commit_map.at(idx);
72 }
73
74 void commit_and_set_special();
75 virtual void commit_regions(uint start_idx,
76 size_t num_regions = 1,
77 uint node_index = G1MemoryNodeManager::AnyNodeIndex,
78 WorkGang* pretouch_workers = NULL) = 0;
79 virtual void uncommit_regions(uint start_idx, size_t num_regions = 1) = 0;
80
81 // Creates an appropriate G1RegionToSpaceMapper for the given parameters.
82 // The actual space to be used within the given reservation is given by actual_size.
83 // This is because some OSes need to round up the reservation size to guarantee
84 // alignment of page_size.
85 // The byte_translation_factor defines how many bytes in a region correspond to
86 // a single byte in the data structure this mapper is for.
87 // Eg. in the card table, this value corresponds to the size a single card
88 // table entry corresponds to in the heap.
89 static G1RegionToSpaceMapper* create_mapper(ReservedSpace rs,
90 size_t actual_size,
91 size_t page_size,
92 size_t region_granularity,
93 size_t byte_translation_factor,
94 MemoryType type);
95
96 static G1RegionToSpaceMapper* create_heap_mapper(ReservedSpace rs,
97 size_t actual_size,
98 size_t page_size,
103
104 // G1RegionToSpaceMapper implementation where
105 // part of space is mapped to dram and part to nv-dimm
106 class G1RegionToHeteroSpaceMapper : public G1RegionToSpaceMapper {
107 private:
108 ReservedSpace _rs;
109 G1RegionToSpaceMapper* _dram_mapper;
110 uint _num_committed_dram;
111 uint _num_committed_nvdimm;
112 uint _start_index_of_dram;
113 size_t _page_size;
114 size_t _commit_factor;
115 MemoryType _type;
116
117 public:
118 G1RegionToHeteroSpaceMapper(ReservedSpace rs, size_t used_size, size_t page_size, size_t region_granularity, size_t commit_factor, MemoryType type);
119 bool initialize();
120 uint num_committed_dram() const;
121 uint num_committed_nvdimm() const;
122
123 virtual void commit_regions(uint start_idx,
124 size_t num_regions = 1,
125 uint node_index = G1MemoryNodeManager::AnyNodeIndex,
126 WorkGang* pretouch_workers = NULL);
127 virtual void uncommit_regions(uint start_idx, size_t num_regions = 1);
128 };
129 #endif // SHARE_GC_G1_G1REGIONTOSPACEMAPPER_HPP
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