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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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7
src/stats.c
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@@ -1376,7 +1376,7 @@ stats_general_print(emitter_t *emitter) {
uint64_t u64v;
int64_t i64v;
ssize_t ssv, ssv2;
size_t sv, bsz, usz, u32sz, i64sz, ssz, sssz, cpsz;
size_t sv, bsz, usz, u32sz, u64sz, i64sz, ssz, sssz, cpsz;
bsz = sizeof(bool);
usz = sizeof(unsigned);
@@ -1385,6 +1385,7 @@ stats_general_print(emitter_t *emitter) {
cpsz = sizeof(const char *);
u32sz = sizeof(uint32_t);
i64sz = sizeof(int64_t);
u64sz = sizeof(uint64_t);
CTL_GET("version", &cpv, const char *);
emitter_kv(emitter, "version", "Version", emitter_type_string, &cpv);
@@ -1442,6 +1443,8 @@ stats_general_print(emitter_t *emitter) {
#define OPT_WRITE_INT64(name) \
OPT_WRITE(name, i64v, i64sz, emitter_type_int64)
#define OPT_WRITE_UINT64(name) \
OPT_WRITE(name, u64v, u64sz, emitter_type_uint64)
#define OPT_WRITE_SIZE_T(name) \
OPT_WRITE(name, sv, ssz, emitter_type_size)
@@ -1468,7 +1471,7 @@ stats_general_print(emitter_t *emitter) {
OPT_WRITE_BOOL("hpa")
OPT_WRITE_SIZE_T("hpa_slab_max_alloc")
OPT_WRITE_SIZE_T("hpa_hugification_threshold")
OPT_WRITE_SIZE_T("hpa_dehugification_threshold")
OPT_WRITE_UINT64("hpa_hugify_delay_ms")
if (je_mallctl("opt.hpa_dirty_mult", (void *)&u32v, &u32sz, NULL, 0)
== 0) {
/*