21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc_implementation/parallelScavenge/parMarkBitMap.hpp"
27 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/os.hpp"
30 #include "utilities/bitMap.inline.hpp"
31 #include "services/memTracker.hpp"
32 #ifdef TARGET_OS_FAMILY_linux
33 # include "os_linux.inline.hpp"
34 #endif
35 #ifdef TARGET_OS_FAMILY_solaris
36 # include "os_solaris.inline.hpp"
37 #endif
38 #ifdef TARGET_OS_FAMILY_windows
39 # include "os_windows.inline.hpp"
40 #endif
41 #ifdef TARGET_OS_FAMILY_bsd
42 # include "os_bsd.inline.hpp"
43 #endif
44
45 bool
46 ParMarkBitMap::initialize(MemRegion covered_region)
47 {
48 const idx_t bits = bits_required(covered_region);
49 // The bits will be divided evenly between two bitmaps; each of them should be
50 // an integral number of words.
51 assert(bits % (BitsPerWord * 2) == 0, "region size unaligned");
52
53 const size_t words = bits / BitsPerWord;
54 const size_t raw_bytes = words * sizeof(idx_t);
55 const size_t page_sz = os::page_size_for_region(raw_bytes, raw_bytes, 10);
56 const size_t granularity = os::vm_allocation_granularity();
57 _reserved_byte_size = align_size_up(raw_bytes, MAX2(page_sz, granularity));
58
59 const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 :
60 MAX2(page_sz, granularity);
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21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc_implementation/parallelScavenge/parMarkBitMap.hpp"
27 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/os.hpp"
30 #include "utilities/bitMap.inline.hpp"
31 #include "services/memTracker.hpp"
32 #ifdef TARGET_OS_FAMILY_linux
33 # include "os_linux.inline.hpp"
34 #endif
35 #ifdef TARGET_OS_FAMILY_solaris
36 # include "os_solaris.inline.hpp"
37 #endif
38 #ifdef TARGET_OS_FAMILY_windows
39 # include "os_windows.inline.hpp"
40 #endif
41 #ifdef TARGET_OS_FAMILY_aix
42 # include "os_aix.inline.hpp"
43 #endif
44 #ifdef TARGET_OS_FAMILY_bsd
45 # include "os_bsd.inline.hpp"
46 #endif
47
48 bool
49 ParMarkBitMap::initialize(MemRegion covered_region)
50 {
51 const idx_t bits = bits_required(covered_region);
52 // The bits will be divided evenly between two bitmaps; each of them should be
53 // an integral number of words.
54 assert(bits % (BitsPerWord * 2) == 0, "region size unaligned");
55
56 const size_t words = bits / BitsPerWord;
57 const size_t raw_bytes = words * sizeof(idx_t);
58 const size_t page_sz = os::page_size_for_region(raw_bytes, raw_bytes, 10);
59 const size_t granularity = os::vm_allocation_granularity();
60 _reserved_byte_size = align_size_up(raw_bytes, MAX2(page_sz, granularity));
61
62 const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 :
63 MAX2(page_sz, granularity);
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