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Add opt.bin_shards to specify number of bin shards.

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The option uses the same format as "slab_sizes" to specify number of shards for
each bin size.
This commit is contained in:
Qi Wang
2018-11-20 13:51:32 -08:00
committed by Qi Wang
parent 37b8913925
commit 3f9f2833f6
5 changed files with 81 additions and 31 deletions
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48
src/bin.c
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@@ -6,13 +6,11 @@
#include "jemalloc/internal/sc.h"
#include "jemalloc/internal/witness.h"
unsigned opt_bin_shard_maxszind;
unsigned opt_n_bin_shards;
bin_info_t bin_infos[SC_NBINS];
void
bin_infos_init(sc_data_t *sc_data, bin_info_t bin_infos[SC_NBINS]) {
static void
bin_infos_init(sc_data_t *sc_data, unsigned bin_shard_sizes[SC_NBINS],
bin_info_t bin_infos[SC_NBINS]) {
for (unsigned i = 0; i < SC_NBINS; i++) {
bin_info_t *bin_info = &bin_infos[i];
sc_t *sc = &sc_data->sc[i];
@@ -21,19 +19,49 @@ bin_infos_init(sc_data_t *sc_data, bin_info_t bin_infos[SC_NBINS]) {
bin_info->slab_size = (sc->pgs << LG_PAGE);
bin_info->nregs =
(uint32_t)(bin_info->slab_size / bin_info->reg_size);
bin_info->n_shards = (i < opt_bin_shard_maxszind) ? opt_n_bin_shards : 1;
bin_info->n_shards = bin_shard_sizes[i];
bitmap_info_t bitmap_info = BITMAP_INFO_INITIALIZER(
bin_info->nregs);
bin_info->bitmap_info = bitmap_info;
}
}
bool
bin_update_shard_size(unsigned bin_shard_sizes[SC_NBINS], size_t start_size,
size_t end_size, size_t nshards) {
if (nshards > BIN_SHARDS_MAX || nshards == 0) {
return true;
}
if (start_size > SC_SMALL_MAXCLASS) {
return false;
}
if (end_size > SC_SMALL_MAXCLASS) {
end_size = SC_SMALL_MAXCLASS;
}
/* Compute the index since this may happen before sz init. */
szind_t ind1 = sz_size2index_compute(start_size);
szind_t ind2 = sz_size2index_compute(end_size);
for (unsigned i = ind1; i <= ind2; i++) {
bin_shard_sizes[i] = (unsigned)nshards;
}
return false;
}
void
bin_boot(sc_data_t *sc_data) {
bin_shard_sizes_boot(unsigned bin_shard_sizes[SC_NBINS]) {
/* Load the default number of shards. */
for (unsigned i = 0; i < SC_NBINS; i++) {
bin_shard_sizes[i] = N_BIN_SHARDS_DEFAULT;
}
}
void
bin_boot(sc_data_t *sc_data, unsigned bin_shard_sizes[SC_NBINS]) {
assert(sc_data->initialized);
opt_bin_shard_maxszind = OPT_BIN_SHARD_MAXSZIND;
opt_n_bin_shards = OPT_N_BIN_SHARDS;
bin_infos_init(sc_data, bin_infos);
bin_infos_init(sc_data, bin_shard_sizes, bin_infos);
}
bool