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HPA: Add an nevictions counter.

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I.e. the number of times we've purged a hugepage-sized region.
This commit is contained in:
David Goldblatt
2020-11-30 19:06:50 -08:00
committed by David Goldblatt
parent fffcefed33
commit 3ed0b4e8a3
4 changed files with 39 additions and 10 deletions
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16
src/stats.c
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@@ -661,12 +661,14 @@ stats_arena_extents_print(emitter_t *emitter, unsigned i) {
}
static void
stats_arena_hpa_shard_print(emitter_t *emitter, unsigned i) {
stats_arena_hpa_shard_print(emitter_t *emitter, unsigned i, uint64_t uptime) {
emitter_row_t header_row;
emitter_row_init(&header_row);
emitter_row_t row;
emitter_row_init(&row);
uint64_t nevictions;
size_t npageslabs_huge;
size_t nactive_huge;
size_t ninactive_huge;
@@ -675,6 +677,9 @@ stats_arena_hpa_shard_print(emitter_t *emitter, unsigned i) {
size_t nactive_nonhuge;
size_t ninactive_nonhuge;
CTL_M2_GET("stats.arenas.0.hpa_shard.nevictions",
i, &nevictions, uint64_t);
CTL_M2_GET("stats.arenas.0.hpa_shard.full_slabs.npageslabs_huge",
i, &npageslabs_huge, size_t);
CTL_M2_GET("stats.arenas.0.hpa_shard.full_slabs.nactive_huge",
@@ -696,13 +701,18 @@ stats_arena_hpa_shard_print(emitter_t *emitter, unsigned i) {
emitter_table_printf(emitter,
"HPA shard stats:\n"
" Evictions: %" FMTu64 " (%" FMTu64 " / sec)\n"
" In full slabs:\n"
" npageslabs: %zu huge, %zu nonhuge\n"
" nactive: %zu huge, %zu nonhuge \n"
" ninactive: %zu huge, %zu nonhuge \n",
npageslabs_huge, npageslabs_nonhuge, nactive_huge, nactive_nonhuge,
nevictions, rate_per_second(nevictions, uptime),
npageslabs_huge, npageslabs_nonhuge,
nactive_huge, nactive_nonhuge,
ninactive_huge, ninactive_nonhuge);
emitter_json_object_kv_begin(emitter, "hpa_shard");
emitter_json_kv(emitter, "nevictions", emitter_type_uint64,
&nevictions);
emitter_json_object_kv_begin(emitter, "full_slabs");
emitter_json_kv(emitter, "npageslabs_huge", emitter_type_size,
&npageslabs_huge);
@@ -1137,7 +1147,7 @@ stats_arena_print(emitter_t *emitter, unsigned i, bool bins, bool large,
stats_arena_extents_print(emitter, i);
}
if (hpa) {
stats_arena_hpa_shard_print(emitter, i);
stats_arena_hpa_shard_print(emitter, i, uptime);
}
}