project-base/server-skynet-source-3rd-jemalloc
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Add narenas_ratio.

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This allows setting arenas per cpu dynamically, rather than forcing the user to
know the number of CPUs in advance if they want a particular CPU/space tradeoff.
This commit is contained in:
David Goldblatt 2020-08-12 12:07:42 -07:00 committed by David Goldblatt
parent 9e18ae639f
commit ab274a23b9
1 changed files with 8 additions and 1 deletions
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9
src/jemalloc.c
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@ -127,6 +127,7 @@ bool opt_utrace = false;
bool opt_xmalloc = false;
bool opt_zero = false;
unsigned opt_narenas = 0;
unsigned opt_narenas_ratio = 4;
unsigned ncpus;
@ -1294,6 +1295,12 @@ malloc_conf_init_helper(sc_data_t *sc_data, unsigned bin_shard_sizes[SC_NBINS],
/* clip */ false)
}
}
if (CONF_MATCH("narenas_ratio")) {
CONF_HANDLE_UNSIGNED(opt_narenas_ratio,
"narenas_ratio", 1, UINT_MAX,
CONF_CHECK_MIN, CONF_DONT_CHECK_MAX,
/* clip */ false)
}
if (CONF_MATCH("bin_shards")) {
const char *bin_shards_segment_cur = v;
size_t vlen_left = vlen;
@ -1781,7 +1788,7 @@ malloc_narenas_default(void) {
* default.
*/
if (ncpus > 1) {
return ncpus << 2;
return ncpus * opt_narenas_ratio;
} else {
return 1;
}