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Add stats counters for number of zero reallocs

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This commit is contained in:
David T. Goldblatt
2019-10-26 11:04:46 -07:00
committed by David Goldblatt
parent 9cfa805947
commit de81a4eada
8 changed files with 81 additions and 2 deletions
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9
src/stats.c
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@@ -1252,6 +1252,7 @@ stats_print_helper(emitter_t *emitter, bool merged, bool destroyed,
size_t allocated, active, metadata, metadata_thp, resident, mapped,
retained;
size_t num_background_threads;
size_t zero_reallocs;
uint64_t background_thread_num_runs, background_thread_run_interval;
CTL_GET("stats.allocated", &allocated, size_t);
@@ -1262,6 +1263,8 @@ stats_print_helper(emitter_t *emitter, bool merged, bool destroyed,
CTL_GET("stats.mapped", &mapped, size_t);
CTL_GET("stats.retained", &retained, size_t);
CTL_GET("stats.zero_reallocs", &zero_reallocs, size_t);
if (have_background_thread) {
CTL_GET("stats.background_thread.num_threads",
&num_background_threads, size_t);
@@ -1285,12 +1288,18 @@ stats_print_helper(emitter_t *emitter, bool merged, bool destroyed,
emitter_json_kv(emitter, "resident", emitter_type_size, &resident);
emitter_json_kv(emitter, "mapped", emitter_type_size, &mapped);
emitter_json_kv(emitter, "retained", emitter_type_size, &retained);
emitter_json_kv(emitter, "zero_reallocs", emitter_type_size,
&zero_reallocs);
emitter_table_printf(emitter, "Allocated: %zu, active: %zu, "
"metadata: %zu (n_thp %zu), resident: %zu, mapped: %zu, "
"retained: %zu\n", allocated, active, metadata, metadata_thp,
resident, mapped, retained);
/* Strange behaviors */
emitter_table_printf(emitter,
"Count of realloc(non-null-ptr, 0) calls: %zu\n", zero_reallocs);
/* Background thread stats. */
emitter_json_object_kv_begin(emitter, "background_thread");
emitter_json_kv(emitter, "num_threads", emitter_type_size,