6 * under the terms of the GNU General Public License version 2 only, as
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/parallel/parMarkBitMap.hpp"
27 #include "gc/parallel/psCompactionManager.inline.hpp"
28 #include "gc/parallel/psParallelCompact.inline.hpp"
29 #include "oops/oop.inline.hpp"
30 #include "runtime/atomic.hpp"
31 #include "runtime/os.hpp"
32 #include "services/memTracker.hpp"
33 #include "utilities/bitMap.inline.hpp"
34
35 bool
36 ParMarkBitMap::initialize(MemRegion covered_region)
37 {
38 const idx_t bits = bits_required(covered_region);
39 // The bits will be divided evenly between two bitmaps; each of them should be
40 // an integral number of words.
41 assert(bits % (BitsPerWord * 2) == 0, "region size unaligned");
42
43 const size_t words = bits / BitsPerWord;
44 const size_t raw_bytes = words * sizeof(idx_t);
45 const size_t page_sz = os::page_size_for_region_aligned(raw_bytes, 10);
46 const size_t granularity = os::vm_allocation_granularity();
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6 * under the terms of the GNU General Public License version 2 only, as
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/parallel/parMarkBitMap.inline.hpp"
27 #include "gc/parallel/psCompactionManager.inline.hpp"
28 #include "gc/parallel/psParallelCompact.inline.hpp"
29 #include "oops/oop.inline.hpp"
30 #include "runtime/atomic.hpp"
31 #include "runtime/os.hpp"
32 #include "services/memTracker.hpp"
33 #include "utilities/bitMap.inline.hpp"
34
35 bool
36 ParMarkBitMap::initialize(MemRegion covered_region)
37 {
38 const idx_t bits = bits_required(covered_region);
39 // The bits will be divided evenly between two bitmaps; each of them should be
40 // an integral number of words.
41 assert(bits % (BitsPerWord * 2) == 0, "region size unaligned");
42
43 const size_t words = bits / BitsPerWord;
44 const size_t raw_bytes = words * sizeof(idx_t);
45 const size_t page_sz = os::page_size_for_region_aligned(raw_bytes, 10);
46 const size_t granularity = os::vm_allocation_granularity();
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