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Normalize size classes.

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Normalize size classes to use the same number of size classes per size
doubling (currently hard coded to 4), across the intire range of size
classes.  Small size classes already used this spacing, but in order to
support this change, additional small size classes now fill [4 KiB .. 16
KiB).  Large size classes range from [16 KiB .. 4 MiB).  Huge size
classes now support non-multiples of the chunk size in order to fill (4
MiB .. 16 MiB).
This commit is contained in:
Jason Evans 2014-10-05 17:54:10 -07:00
parent 3c3b3b1a94
commit 155bfa7da1
16 changed files with 558 additions and 475 deletions
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34
src/jemalloc.c
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@ -42,6 +42,38 @@ unsigned narenas_auto;
/* Set to true once the allocator has been initialized. */
static bool malloc_initialized = false;
JEMALLOC_ALIGNED(CACHELINE)
const size_t index2size_tab[NSIZES] = {
#define SC(index, lg_grp, lg_delta, ndelta, bin, lg_delta_lookup) \
((ZU(1)<<lg_grp) + (ZU(ndelta)<<lg_delta)),
SIZE_CLASSES
#undef SC
};
JEMALLOC_ALIGNED(CACHELINE)
const uint8_t size2index_tab[] = {
#define S2B_3(i) i,
#define S2B_4(i) S2B_3(i) S2B_3(i)
#define S2B_5(i) S2B_4(i) S2B_4(i)
#define S2B_6(i) S2B_5(i) S2B_5(i)
#define S2B_7(i) S2B_6(i) S2B_6(i)
#define S2B_8(i) S2B_7(i) S2B_7(i)
#define S2B_9(i) S2B_8(i) S2B_8(i)
#define S2B_no(i)
#define SC(index, lg_grp, lg_delta, ndelta, bin, lg_delta_lookup) \
S2B_##lg_delta_lookup(index)
SIZE_CLASSES
#undef S2B_3
#undef S2B_4
#undef S2B_5
#undef S2B_6
#undef S2B_7
#undef S2B_8
#undef S2B_9
#undef S2B_no
#undef SC
};
#ifdef JEMALLOC_THREADED_INIT
/* Used to let the initializing thread recursively allocate. */
# define NO_INITIALIZER ((unsigned long)0)
@ -1731,7 +1763,7 @@ ixallocx_prof_sample(void *ptr, size_t old_usize, size_t size, size_t extra,
alignment, zero))
return (old_usize);
usize = isalloc(ptr, config_prof);
if (max_usize < PAGE)
if (max_usize < LARGE_MINCLASS)
arena_prof_promoted(ptr, usize);
} else {
usize = ixallocx_helper(ptr, old_usize, size, extra, alignment,