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diag: report the allocator's own committed area beside the OS view

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Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
This commit is contained in:
Martin Vogel
2026-07-25 23:13:51 +02:00
parent 7605d34b84
commit 7cefb5e036
1 changed files with 12 additions and 1 deletions
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src/foundation/mem.c
+12 -1
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@@ -909,6 +909,17 @@ void cbm_mem_census_log(const char *tag) {
* both from one place keeps the two views on the same sample. */
cbm_mem_profile_totals_t profile;
cbm_mem_profile_totals(&profile);
/* The allocator's OWN view, next to the OS view. If mimalloc's committed
* area tracks the process's private commit, the memory is the allocator's
* and it is holding pages against tiny live data; if it stays flat while
* private climbs, the growth is outside the allocator entirely and no
* allocator option will ever move it (thirteen of them did not). */
cbm_mem_map_t map;
(void)cbm_mem_map_collect(&map);
char map_live_kb[CBM_SZ_32];
char map_area_kb[CBM_SZ_32];
(void)snprintf(map_live_kb, sizeof(map_live_kb), "%zu", map.live_bytes / CBM_SZ_1K);
(void)snprintf(map_area_kb, sizeof(map_area_kb), "%zu", map.area_committed_bytes / CBM_SZ_1K);
char prof_live_kb[CBM_SZ_32];
char prof_sites[CBM_SZ_32];
char prof_lost[CBM_SZ_32];
@@ -924,7 +935,7 @@ void cbm_mem_census_log(const char *tag) {
(void)cbm_mem_profile_dump(profile_path, tag ? tag : "?");
}
cbm_log_info("mem.census", "at", tag ? tag : "?",
"prof_live_kb", prof_live_kb, "prof_sites", prof_sites, "prof_total_kb", prof_total_kb, "prof_lost", prof_lost, "priv_kb", priv_kb, "crt_kb", crt_kb,
"prof_live_kb", prof_live_kb, "mi_area_kb", map_area_kb, "mi_live_kb", map_live_kb, "prof_sites", prof_sites, "prof_total_kb", prof_total_kb, "prof_lost", prof_lost, "priv_kb", priv_kb, "crt_kb", crt_kb,
"crt_busy_kb", busy_kb, "mapped_kb", mapped_kb, "rss_kb", rss_kb, "biggest_kb",
biggest_kb, "regions", regions, "big_regions", big_regions, "heaps", heaps,
"decommit_calls", dc_calls, "decommit_fails", dc_fail, "decommit_err", dc_err,