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Tcache flush: keep common path state in registers.

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By carefully force-inlining the division constants and the operation sum count,
we can eliminate redundant operations in the arena-level dalloc function.  Do
so.
This commit is contained in:
David Goldblatt 2021-01-29 16:06:28 -08:00 • committed by David Goldblatt
parent 31a629c3de
commit 229994a204
5 changed files with 130 additions and 79 deletions
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5
test/unit/slab.c
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@ -16,10 +16,13 @@ TEST_BEGIN(test_arena_slab_regind) {
EXTENT_NOT_HEAD);
expect_ptr_not_null(edata_addr_get(&slab),
"Unexpected malloc() failure");
arena_dalloc_bin_locked_info_t dalloc_info;
arena_dalloc_bin_locked_begin(&dalloc_info, binind);
for (regind = 0; regind < bin_info->nregs; regind++) {
void *reg = (void *)((uintptr_t)edata_addr_get(&slab) +
(bin_info->reg_size * regind));
expect_zu_eq(arena_slab_regind(&slab, binind, reg),
expect_zu_eq(arena_slab_regind(&dalloc_info, binind,
&slab, reg),
regind,
"Incorrect region index computed for size %zu",
bin_info->reg_size);