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Hunk API, using FreeBSD super page for large requests.
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1 changed files with 14 additions and 1 deletions
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@ -58,9 +58,22 @@ Hunk_Begin(int maxsize)
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/* plus 32 bytes for cacheline */
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maxhunksize = maxsize + sizeof(size_t) + 32;
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curhunksize = 0;
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int flags = MAP_PRIVATE | MAP_ANONYMOUS;
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#if defined(MAP_ALIGNED_SUPER)
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const size_t hgpagesize = 1UL<<21;
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size_t page_size = sysconf(_SC_PAGESIZE);
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/* Archs supported has 2MB for super pages size */
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if (maxhunksize >= hgpagesize)
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{
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maxhunksize = (maxhunksize & ~(page_size-1)) + page_size;
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flags |= MAP_ALIGNED_SUPER;
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}
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#endif
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membase = mmap(0, maxhunksize, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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flags, -1, 0);
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if ((membase == NULL) || (membase == (byte *)-1))
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{
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