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vfs cache: add sysctl vfs.cache.param.hitpct

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Sponsored by:	Rubicon Communications, LLC ("Netgate")
This commit is contained in:
Mateusz Guzik 2024-07-08 17:57:39 +00:00
parent bea256f3c5
commit 0a48720722
1 changed files with 20 additions and 0 deletions
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20
sys/kern/vfs_cache.c
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@ -1071,6 +1071,26 @@ SYSCTL_PROC(_vfs_cache, OID_AUTO, nchstats, CTLTYPE_OPAQUE | CTLFLAG_RD |
CTLFLAG_MPSAFE, 0, 0, sysctl_nchstats, "LU",
"VFS cache effectiveness statistics");
static int
sysctl_hitpct(SYSCTL_HANDLER_ARGS)
{
long poshits, neghits, miss, total;
long pct;
poshits = counter_u64_fetch(numposhits);
neghits = counter_u64_fetch(numneghits);
miss = counter_u64_fetch(nummiss);
total = poshits + neghits + miss;
pct = 0;
if (total != 0)
pct = ((poshits + neghits) * 100) / total;
return (sysctl_handle_int(oidp, 0, pct, req));
}
SYSCTL_PROC(_vfs_cache_stats, OID_AUTO, hitpct,
CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_hitpct,
"I", "Percentage of hits");
static void
cache_recalc_neg_min(void)
{