project-base/server-skynet-source-3rd-jemalloc
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Remove an arena_bin_run_size_calc() constraint.

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Remove the constraint that small run headers fit in one page.  This
constraint was necessary to avoid dirty page purging issues for unused
pages within runs for medium size classes (which no longer exist).
This commit is contained in:
Jason Evans 2010-12-16 14:23:32 -08:00
parent 2b769797ce
commit 2a6f2af6e4
1 changed files with 1 additions and 3 deletions
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4
jemalloc/src/arena.c
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@ -1367,7 +1367,6 @@ arena_tcache_fill_small(arena_t *arena, tcache_bin_t *tbin, size_t binind
* *) bin->run_size >= min_run_size * *) bin->run_size >= min_run_size
* *) bin->run_size <= arena_maxclass * *) bin->run_size <= arena_maxclass
* *) run header overhead <= RUN_MAX_OVRHD (or header overhead relaxed). * *) run header overhead <= RUN_MAX_OVRHD (or header overhead relaxed).
* *) run header size < PAGE_SIZE
* *
* bin->nregs and bin->reg0_offset are also calculated here, since these * bin->nregs and bin->reg0_offset are also calculated here, since these
* settings are all interdependent. * settings are all interdependent.
@ -1453,8 +1452,7 @@ arena_bin_run_size_calc(arena_bin_t *bin, size_t min_run_size)
} while (try_run_size <= arena_maxclass } while (try_run_size <= arena_maxclass
&& try_run_size <= arena_maxclass && try_run_size <= arena_maxclass
&& RUN_MAX_OVRHD * (bin->reg_size << 3) > RUN_MAX_OVRHD_RELAX && RUN_MAX_OVRHD * (bin->reg_size << 3) > RUN_MAX_OVRHD_RELAX
&& (try_reg0_offset << RUN_BFP) > RUN_MAX_OVRHD * try_run_size && (try_reg0_offset << RUN_BFP) > RUN_MAX_OVRHD * try_run_size);
&& try_hdr_size < PAGE_SIZE);
assert(good_hdr_size <= good_reg0_offset); assert(good_hdr_size <= good_reg0_offset);