[src/trunk]: src/sys/arch/alpha/alpha Instrument the number of calls to pmap_...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a2b5da5d5086
branches:  trunk
changeset: 984373:a2b5da5d5086
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Mon Jul 05 15:12:00 2021 +0000

description:
Instrument the number of calls to pmap_growkernel().

diffstat:

 sys/arch/alpha/alpha/pmap.c |  15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diffs (50 lines):

diff -r 4e40c139b813 -r a2b5da5d5086 sys/arch/alpha/alpha/pmap.c
--- a/sys/arch/alpha/alpha/pmap.c       Mon Jul 05 14:51:23 2021 +0000
+++ b/sys/arch/alpha/alpha/pmap.c       Mon Jul 05 15:12:00 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.295 2021/07/05 10:00:22 thorpej Exp $ */
+/* $NetBSD: pmap.c,v 1.296 2021/07/05 15:12:00 thorpej Exp $ */
 
 /*-
  * Copyright (c) 1998, 1999, 2000, 2001, 2007, 2008, 2020
@@ -135,7 +135,7 @@
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.295 2021/07/05 10:00:22 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.296 2021/07/05 15:12:00 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -258,6 +258,11 @@
 static TAILQ_HEAD(, pmap) pmap_all_pmaps __cacheline_aligned;
 
 /*
+ * Instrument the number of calls to pmap_growkernel().
+ */
+static struct evcnt pmap_growkernel_evcnt __read_mostly;
+
+/*
  * The pools from which pmap structures and sub-structures are allocated.
  */
 static struct pool_cache pmap_pmap_cache __read_mostly;
@@ -1548,6 +1553,10 @@
        /* Initialize TLB handling. */
        pmap_tlb_init();
 
+       /* Instrument pmap_growkernel(). */
+       evcnt_attach_dynamic_nozero(&pmap_growkernel_evcnt, EVCNT_TYPE_MISC,
+           NULL, "pmap", "growkernel");
+
        /*
         * Set a low water mark on the pv_entry pool, so that we are
         * more likely to have these around even in extreme memory
@@ -3593,6 +3602,8 @@
        if (maxkvaddr <= virtual_end)
                goto out;               /* we are OK */
 
+       pmap_growkernel_evcnt.ev_count++;
+
        va = virtual_end;
 
        while (va < maxkvaddr) {