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Implement pz2ind(), pind2sz(), and psz2u().

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These compute size classes and indices similarly to size2index(),
index2size() and s2u(), respectively, but using the subset of size
classes that are multiples of the page size.  Note that pszind_t and
szind_t are not interchangeable.
This commit is contained in:
Jason Evans
2016-04-17 16:16:11 -07:00
parent 627372b459
commit 226c446979
6 changed files with 202 additions and 25 deletions
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5
src/arena.c
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@@ -19,7 +19,8 @@ const arena_bin_info_t arena_bin_info[NBINS] = {
#define BIN_INFO_bin_yes(reg_size, run_size, nregs) \
{reg_size, run_size, nregs, BITMAP_INFO_INITIALIZER(nregs)},
#define BIN_INFO_bin_no(reg_size, run_size, nregs)
#define SC(index, lg_grp, lg_delta, ndelta, bin, pgs, lg_delta_lookup) \
#define SC(index, lg_grp, lg_delta, ndelta, psz, bin, pgs, \
lg_delta_lookup) \
BIN_INFO_bin_##bin((1U<<lg_grp) + (ndelta<<lg_delta), \
(pgs << LG_PAGE), (pgs << LG_PAGE) / ((1U<<lg_grp) + \
(ndelta<<lg_delta)))
@@ -3511,7 +3512,7 @@ small_run_size_init(void)
small_run_tab[bin_info->run_size >> LG_PAGE] = true; \
}
#define TAB_INIT_bin_no(index, size)
#define SC(index, lg_grp, lg_delta, ndelta, bin, run_size, \
#define SC(index, lg_grp, lg_delta, ndelta, psz, bin, run_size, \
lg_delta_lookup) \
TAB_INIT_bin_##bin(index, (ZU(1)<<lg_grp) + (ZU(ndelta)<<lg_delta))
SIZE_CLASSES

4
src/jemalloc.c
View File

@@ -81,7 +81,7 @@ static uint8_t malloc_slow_flags;
/* Last entry for overflow detection only. */
JEMALLOC_ALIGNED(CACHELINE)
const size_t index2size_tab[NSIZES+1] = {
#define SC(index, lg_grp, lg_delta, ndelta, bin, pgs, lg_delta_lookup) \
#define SC(index, lg_grp, lg_delta, ndelta, psz, bin, pgs, lg_delta_lookup) \
((ZU(1)<<lg_grp) + (ZU(ndelta)<<lg_delta)),
SIZE_CLASSES
#undef SC
@@ -154,7 +154,7 @@ const uint8_t size2index_tab[] = {
#define S2B_11(i) S2B_10(i) S2B_10(i)
#endif
#define S2B_no(i)
#define SC(index, lg_grp, lg_delta, ndelta, bin, pgs, lg_delta_lookup) \
#define SC(index, lg_grp, lg_delta, ndelta, psz, bin, pgs, lg_delta_lookup) \
S2B_##lg_delta_lookup(index)
SIZE_CLASSES
#undef S2B_3