9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "gc/parallel/parallelArguments.hpp"
27 #include "gc/parallel/parallelScavengeHeap.hpp"
28 #include "gc/shared/adaptiveSizePolicy.hpp"
29 #include "gc/shared/fullGCForwarding.hpp"
30 #include "gc/shared/gcArguments.hpp"
31 #include "gc/shared/genArguments.hpp"
32 #include "gc/shared/workerPolicy.hpp"
33 #include "logging/log.hpp"
34 #include "runtime/globals.hpp"
35 #include "runtime/globals_extension.hpp"
36 #include "runtime/java.hpp"
37 #include "utilities/defaultStream.hpp"
38 #include "utilities/powerOfTwo.hpp"
39
40 static size_t num_young_spaces() {
41 // When using NUMA, we create one MutableNUMASpace for each NUMA node
42 const size_t num_eden_spaces = UseNUMA ? os::numa_get_groups_num() : 1;
43
44 // The young generation must have room for eden + two survivors
45 return num_eden_spaces + 2;
46 }
47
48 static size_t num_old_spaces() {
49 return 1;
110 "Inconsistent MinSurvivorRatio vs InitialSurvivorRatio: %zu vs %zu\n", MinSurvivorRatio, InitialSurvivorRatio);
111 }
112 FLAG_SET_DEFAULT(MinSurvivorRatio, InitialSurvivorRatio);
113 } else {
114 FLAG_SET_DEFAULT(InitialSurvivorRatio, MinSurvivorRatio);
115 }
116 }
117
118 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
119 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
120 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
121 // See CR 6362902 for details.
122 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
123 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
124 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
125 }
126 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
127 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
128 }
129 }
130
131 FullGCForwarding::initialize_flags(heap_reserved_size_bytes());
132 }
133
134 size_t ParallelArguments::conservative_max_heap_alignment() {
135 // The card marking array and the offset arrays for old generations are
136 // committed in os pages as well. Make sure they are entirely full (to
137 // avoid partial page problems), e.g. if 512 bytes heap corresponds to 1
138 // byte entry and the os page size is 4096, the maximum heap size should
139 // be 512*4096 = 2MB aligned.
140
141 size_t alignment = CardTable::ct_max_alignment_constraint();
142
143 if (UseLargePages) {
144 // In presence of large pages we have to make sure that our
145 // alignment is large page aware.
146 alignment = lcm(os::large_page_size(), alignment);
147 }
148
149 return alignment;
150 }
151
|
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "gc/parallel/parallelArguments.hpp"
27 #include "gc/parallel/parallelScavengeHeap.hpp"
28 #include "gc/shared/adaptiveSizePolicy.hpp"
29 #include "gc/shared/gcArguments.hpp"
30 #include "gc/shared/genArguments.hpp"
31 #include "gc/shared/workerPolicy.hpp"
32 #include "logging/log.hpp"
33 #include "runtime/globals.hpp"
34 #include "runtime/globals_extension.hpp"
35 #include "runtime/java.hpp"
36 #include "utilities/defaultStream.hpp"
37 #include "utilities/powerOfTwo.hpp"
38
39 static size_t num_young_spaces() {
40 // When using NUMA, we create one MutableNUMASpace for each NUMA node
41 const size_t num_eden_spaces = UseNUMA ? os::numa_get_groups_num() : 1;
42
43 // The young generation must have room for eden + two survivors
44 return num_eden_spaces + 2;
45 }
46
47 static size_t num_old_spaces() {
48 return 1;
109 "Inconsistent MinSurvivorRatio vs InitialSurvivorRatio: %zu vs %zu\n", MinSurvivorRatio, InitialSurvivorRatio);
110 }
111 FLAG_SET_DEFAULT(MinSurvivorRatio, InitialSurvivorRatio);
112 } else {
113 FLAG_SET_DEFAULT(InitialSurvivorRatio, MinSurvivorRatio);
114 }
115 }
116
117 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
118 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
119 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
120 // See CR 6362902 for details.
121 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
122 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
123 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
124 }
125 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
126 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
127 }
128 }
129 }
130
131 size_t ParallelArguments::conservative_max_heap_alignment() {
132 // The card marking array and the offset arrays for old generations are
133 // committed in os pages as well. Make sure they are entirely full (to
134 // avoid partial page problems), e.g. if 512 bytes heap corresponds to 1
135 // byte entry and the os page size is 4096, the maximum heap size should
136 // be 512*4096 = 2MB aligned.
137
138 size_t alignment = CardTable::ct_max_alignment_constraint();
139
140 if (UseLargePages) {
141 // In presence of large pages we have to make sure that our
142 // alignment is large page aware.
143 alignment = lcm(os::large_page_size(), alignment);
144 }
145
146 return alignment;
147 }
148
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