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MINOR: pools: report the amount used by thread caches in "show pools"

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The "show pools" command provides some "allocated" and "used" estimates
on the pools objects, but this applies to the shared pool and the "used"
includes what is currently assigned to thread-local caches. It's possible
to know how much each thread uses, so let's dump the total size allocated
by thread caches as an estimate. It's only done when pools are enabled,
which explains why the patch adds quite a lot of ifdefs.
This commit is contained in:
Willy Tarreau 2021-10-07 16:29:31 +02:00
parent 1a9b8a6122
commit 1b4a714266
1 changed files with 33 additions and 8 deletions
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41
src/pool.c
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@ -519,23 +519,48 @@ void dump_pools_to_trash()
struct pool_head *entry;
unsigned long allocated, used;
int nbpools;
#ifdef CONFIG_HAP_POOLS
unsigned long cached_bytes = 0;
uint cached = 0;
#endif
allocated = used = nbpools = 0;
chunk_printf(&trash, "Dumping pools usage. Use SIGQUIT to flush them.\n");
list_for_each_entry(entry, &pools, list) {
chunk_appendf(&trash, " - Pool %s (%u bytes) : %u allocated (%u bytes), %u used, needed_avg %u, %u failures, %u users, @%p%s\n",
entry->name, entry->size, entry->allocated,
entry->size * entry->allocated, entry->used,
swrate_avg(entry->needed_avg, POOL_AVG_SAMPLES), entry->failed,
entry->users, entry,
(entry->flags & MEM_F_SHARED) ? " [SHARED]" : "");
#ifdef CONFIG_HAP_POOLS
int i;
for (cached = i = 0; i < global.nbthread; i++)
cached += entry->cache[i].count;
cached_bytes += cached * entry->size;
#endif
chunk_appendf(&trash, " - Pool %s (%u bytes) : %u allocated (%u bytes), %u used"
#ifdef CONFIG_HAP_POOLS
" (~%u by thread caches)"
#endif
", needed_avg %u, %u failures, %u users, @%p%s\n",
entry->name, entry->size, entry->allocated,
entry->size * entry->allocated, entry->used,
#ifdef CONFIG_HAP_POOLS
cached,
#endif
swrate_avg(entry->needed_avg, POOL_AVG_SAMPLES), entry->failed,
entry->users, entry,
(entry->flags & MEM_F_SHARED) ? " [SHARED]" : "");
allocated += entry->allocated * entry->size;
used += entry->used * entry->size;
nbpools++;
}
chunk_appendf(&trash, "Total: %d pools, %lu bytes allocated, %lu used.\n",
nbpools, allocated, used);
chunk_appendf(&trash, "Total: %d pools, %lu bytes allocated, %lu used"
#ifdef CONFIG_HAP_POOLS
" (~%lu by thread caches)"
#endif
".\n",
nbpools, allocated, used
#ifdef CONFIG_HAP_POOLS
, cached_bytes
#endif
);
}
/* Dump statistics on pools usage. */