7 * published by the Free Software Foundation.
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 #include "precompiled.hpp"
26 #include "gc/g1/g1BiasedArray.hpp"
27 #include "gc/g1/g1RegionToSpaceMapper.hpp"
28 #include "logging/log.hpp"
29 #include "memory/allocation.inline.hpp"
30 #include "memory/virtualspace.hpp"
31 #include "runtime/java.hpp"
32 #include "runtime/os.inline.hpp"
33 #include "services/memTracker.hpp"
34 #include "utilities/align.hpp"
35 #include "utilities/bitMap.inline.hpp"
36 #include "utilities/formatBuffer.hpp"
37
38 G1RegionToSpaceMapper::G1RegionToSpaceMapper(ReservedSpace rs,
39 size_t used_size,
40 size_t page_size,
41 size_t region_granularity,
42 size_t commit_factor,
43 MemoryType type) :
44 _listener(NULL),
45 _storage(rs, used_size, page_size),
46 _region_granularity(region_granularity),
47 _commit_map(rs.size() * commit_factor / region_granularity, mtGC) {
48 guarantee(is_power_of_2(page_size), "must be");
49 guarantee(is_power_of_2(region_granularity), "must be");
50
51 MemTracker::record_virtual_memory_type((address)rs.base(), type);
52 }
53
54 // G1RegionToSpaceMapper implementation where the region granularity is larger than
55 // or the same as the commit granularity.
56 // Basically, the space corresponding to one region region spans several OS pages.
57 class G1RegionsLargerThanCommitSizeMapper : public G1RegionToSpaceMapper {
58 private:
59 size_t _pages_per_region;
60
61 public:
62 G1RegionsLargerThanCommitSizeMapper(ReservedSpace rs,
63 size_t actual_size,
64 size_t page_size,
65 size_t alloc_granularity,
66 size_t commit_factor,
67 MemoryType type) :
68 G1RegionToSpaceMapper(rs, actual_size, page_size, alloc_granularity, commit_factor, type),
69 _pages_per_region(alloc_granularity / (page_size * commit_factor)) {
70
71 guarantee(alloc_granularity >= page_size, "allocation granularity smaller than commit granularity");
72 }
73
74 virtual void commit_regions(uint start_idx, size_t num_regions, WorkGang* pretouch_gang) {
75 size_t const start_page = (size_t)start_idx * _pages_per_region;
76 bool zero_filled = _storage.commit(start_page, num_regions * _pages_per_region);
77 if (AlwaysPreTouch) {
78 _storage.pretouch(start_page, num_regions * _pages_per_region, pretouch_gang);
79 }
80 _commit_map.set_range(start_idx, start_idx + num_regions);
81 fire_on_commit(start_idx, num_regions, zero_filled);
82 }
83
84 virtual void uncommit_regions(uint start_idx, size_t num_regions) {
85 _storage.uncommit((size_t)start_idx * _pages_per_region, num_regions * _pages_per_region);
86 _commit_map.clear_range(start_idx, start_idx + num_regions);
87 }
88 };
89
90 // G1RegionToSpaceMapper implementation where the region granularity is smaller
91 // than the commit granularity.
92 // Basically, the contents of one OS page span several regions.
93 class G1RegionsSmallerThanCommitSizeMapper : public G1RegionToSpaceMapper {
94 private:
95 class CommitRefcountArray : public G1BiasedMappedArray<uint> {
96 protected:
97 virtual uint default_value() const { return 0; }
98 };
|
7 * published by the Free Software Foundation.
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 #include "precompiled.hpp"
26 #include "gc/g1/g1BiasedArray.hpp"
27 #include "gc/g1/g1MemoryNodeManager.hpp"
28 #include "gc/g1/g1RegionToSpaceMapper.hpp"
29 #include "logging/log.hpp"
30 #include "memory/allocation.inline.hpp"
31 #include "memory/virtualspace.hpp"
32 #include "runtime/java.hpp"
33 #include "runtime/os.inline.hpp"
34 #include "services/memTracker.hpp"
35 #include "utilities/align.hpp"
36 #include "utilities/bitMap.inline.hpp"
37 #include "utilities/formatBuffer.hpp"
38
39 G1RegionToSpaceMapper::G1RegionToSpaceMapper(ReservedSpace rs,
40 size_t used_size,
41 size_t page_size,
42 size_t region_granularity,
43 size_t commit_factor,
44 MemoryType type) :
45 _listener(NULL),
46 _storage(rs, used_size, page_size, type),
47 _region_granularity(region_granularity),
48 _commit_map(rs.size() * commit_factor / region_granularity, mtGC) {
49 guarantee(is_power_of_2(page_size), "must be");
50 guarantee(is_power_of_2(region_granularity), "must be");
51
52 MemTracker::record_virtual_memory_type((address)rs.base(), type);
53 }
54
55 // G1RegionToSpaceMapper implementation where the region granularity is larger than
56 // or the same as the commit granularity.
57 // Basically, the space corresponding to one region region spans several OS pages.
58 class G1RegionsLargerThanCommitSizeMapper : public G1RegionToSpaceMapper {
59 private:
60 size_t _pages_per_region;
61
62 public:
63 G1RegionsLargerThanCommitSizeMapper(ReservedSpace rs,
64 size_t actual_size,
65 size_t page_size,
66 size_t alloc_granularity,
67 size_t commit_factor,
68 MemoryType type) :
69 G1RegionToSpaceMapper(rs, actual_size, page_size, alloc_granularity, commit_factor, type),
70 _pages_per_region(alloc_granularity / (page_size * commit_factor)) {
71
72 guarantee(alloc_granularity >= page_size, "allocation granularity smaller than commit granularity");
73 }
74
75 virtual void commit_regions(uint start_idx, size_t num_regions, WorkGang* pretouch_gang) {
76 const size_t start_page = (size_t)start_idx * _pages_per_region;
77 const size_t size_in_pages = num_regions * _pages_per_region;
78 bool zero_filled = _storage.commit(start_page, size_in_pages);
79 if (AlwaysPreTouch) {
80 _storage.pretouch(start_page, size_in_pages, pretouch_gang);
81 }
82 _commit_map.set_range(start_idx, start_idx + num_regions);
83 fire_on_commit(start_idx, num_regions, zero_filled);
84 }
85
86 virtual void uncommit_regions(uint start_idx, size_t num_regions) {
87 _storage.uncommit((size_t)start_idx * _pages_per_region, num_regions * _pages_per_region);
88 _commit_map.clear_range(start_idx, start_idx + num_regions);
89 }
90 };
91
92 // G1RegionToSpaceMapper implementation where the region granularity is smaller
93 // than the commit granularity.
94 // Basically, the contents of one OS page span several regions.
95 class G1RegionsSmallerThanCommitSizeMapper : public G1RegionToSpaceMapper {
96 private:
97 class CommitRefcountArray : public G1BiasedMappedArray<uint> {
98 protected:
99 virtual uint default_value() const { return 0; }
100 };
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