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HPA: Hugification hysteresis.

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We wait a while after deciding a huge extent should get hugified to see if it
gets purged before long.  This avoids hugifying extents that might shortly get
dehugified for purging.

Rename and use the hpa_dehugification_threshold option support code for this,
since it's now ignored.
This commit is contained in:
David Goldblatt 2021-06-14 14:53:23 -07:00 • committed by David Goldblatt
parent 113938b6f4
commit 6630c59896
9 changed files with 234 additions and 60 deletions
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24
src/jemalloc.c
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@ -1145,6 +1145,9 @@ malloc_conf_init_helper(sc_data_t *sc_data, unsigned bin_shard_sizes[SC_NBINS],
#define CONF_HANDLE_INT64_T(o, n, min, max, check_min, check_max, clip) \
CONF_HANDLE_T_SIGNED(int64_t, o, n, min, max, \
check_min, check_max, clip)
#define CONF_HANDLE_UINT64_T(o, n, min, max, check_min, check_max, clip)\
CONF_HANDLE_T_U(uint64_t, o, n, min, max, \
check_min, check_max, clip)
#define CONF_HANDLE_SSIZE_T(o, n, min, max) \
CONF_HANDLE_T_SIGNED(ssize_t, o, n, min, max, \
CONF_CHECK_MIN, CONF_CHECK_MAX, false)
@ -1441,26 +1444,9 @@ malloc_conf_init_helper(sc_data_t *sc_data, unsigned bin_shard_sizes[SC_NBINS],
CONF_CONTINUE;
}
/* And the same for the dehugification_threhsold. */
CONF_HANDLE_SIZE_T(
opt_hpa_opts.dehugification_threshold,
"hpa_dehugification_threshold", PAGE, HUGEPAGE,
CONF_CHECK_MIN, CONF_CHECK_MAX, true);
if (CONF_MATCH("hpa_dehugification_threshold_ratio")) {
fxp_t ratio;
char *end;
bool err = fxp_parse(&ratio, v,
&end);
if (err || (size_t)(end - v) != vlen
|| ratio > FXP_INIT_INT(1)) {
CONF_ERROR("Invalid conf value",
k, klen, v, vlen);
} else {
opt_hpa_opts.dehugification_threshold =
fxp_mul_frac(HUGEPAGE, ratio);
}
CONF_CONTINUE;
}
opt_hpa_opts.hugify_delay_ms, "hpa_hugify_delay_ms",
0, 0, CONF_CHECK_MIN, CONF_DONT_CHECK_MAX, true);
if (CONF_MATCH("hpa_dirty_mult")) {
if (CONF_MATCH_VALUE("-1")) {