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_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP
27
28 #include "oops/markOop.hpp"
29 #include "oops/oop.hpp"
30 #include "runtime/perfData.hpp"
31
32 /* Copyright (c) 1992-2009 Oracle and/or its affiliates, and Stanford University.
33 See the LICENSE file for license information. */
34
35 // Age table for adaptive feedback-mediated tenuring (scavenging)
36 //
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 add(p->age(), oop_size);
59 }
60
61 void add(uint age, 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
|
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_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP
27
28 #include "oops/markOop.hpp"
29 #include "oops/oop.hpp"
30 #include "runtime/perfData.hpp"
31
32 class GCPolicyCounters;
33
34 /* Copyright (c) 1992-2009 Oracle and/or its affiliates, and Stanford University.
35 See the LICENSE file for license information. */
36
37 // Age table for adaptive feedback-mediated tenuring (scavenging)
38 //
39 // Note: all sizes are in oops
40
41 class ageTable VALUE_OBJ_CLASS_SPEC {
42 friend class VMStructs;
43
44 public:
45 // constants
46 enum { table_size = markOopDesc::max_age + 1 };
47
48 // instance variables
49 size_t sizes[table_size];
50
51 // constructor. "global" indicates that this is the global age table
52 // (as opposed to gc-thread-local)
53 ageTable(bool global = true);
54
55 // clear table
56 void clear();
57
58 // add entry
59 void add(oop p, size_t oop_size) {
60 add(p->age(), oop_size);
61 }
62
63 void add(uint age, size_t oop_size) {
64 assert(age > 0 && age < table_size, "invalid age of object");
65 sizes[age] += oop_size;
66 }
67
68 // Merge another age table with the current one. Used
69 // for parallel young generation gc.
70 void merge(ageTable* subTable);
71 void merge_par(ageTable* subTable);
72
73 // calculate new tenuring threshold based on age information
74 uint compute_tenuring_threshold(size_t survivor_capacity, GCPolicyCounters* gc_counters);
75
76 private:
77 PerfVariable* _perf_sizes[table_size];
78 };
79
80 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP
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