Module Name: src
Committed By: simonb
Date: Thu Apr 1 06:25:46 UTC 2021
Modified Files:
src/sys/kern: kern_uidinfo.c
Log Message:
Add a sysctl hashstat collector for uihash.
To generate a diff of this commit:
cvs rdiff -u -r1.11 -r1.12 src/sys/kern/kern_uidinfo.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/kern/kern_uidinfo.c
diff -u src/sys/kern/kern_uidinfo.c:1.11 src/sys/kern/kern_uidinfo.c:1.12
--- src/sys/kern/kern_uidinfo.c:1.11 Fri Mar 1 03:03:19 2019
+++ src/sys/kern/kern_uidinfo.c Thu Apr 1 06:25:45 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: kern_uidinfo.c,v 1.11 2019/03/01 03:03:19 christos Exp $ */
+/* $NetBSD: kern_uidinfo.c,v 1.12 2021/04/01 06:25:45 simonb Exp $ */
/*-
* Copyright (c) 1982, 1986, 1991, 1993
@@ -35,7 +35,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_uidinfo.c,v 1.11 2019/03/01 03:03:19 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_uidinfo.c,v 1.12 2021/04/01 06:25:45 simonb Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -132,6 +132,37 @@ sysctl_kern_uidinfo_setup(void)
CTL_CREATE, CTL_EOL);
}
+static int
+uid_stats(struct hashstat_sysctl *hs, bool fill)
+{
+ struct uidinfo *uip;
+ uint64_t chain;
+
+ strlcpy(hs->hash_name, "uihash", sizeof(hs->hash_name));
+ strlcpy(hs->hash_desc, "user info (uid->used proc) hash",
+ sizeof(hs->hash_desc));
+ if (!fill)
+ return 0;
+
+ hs->hash_size = uihash + 1;
+
+ for (size_t i = 0; i < hs->hash_size; i++) {
+ chain = 0;
+ SLIST_FOREACH(uip, &uihashtbl[i], ui_hash) {
+ membar_datadep_consumer();
+ chain++;
+ }
+ if (chain > 0) {
+ hs->hash_used++;
+ hs->hash_items += chain;
+ if (chain > hs->hash_maxchain)
+ hs->hash_maxchain = chain;
+ }
+ }
+
+ return 0;
+}
+
void
uid_init(void)
{
@@ -151,6 +182,7 @@ uid_init(void)
*/
(void)uid_find(0);
sysctl_kern_uidinfo_setup();
+ hashstat_register("uihash", uid_stats);
}
struct uidinfo *
