Module Name: src
Committed By: thorpej
Date: Tue Dec 29 17:16:15 UTC 2020
Modified Files:
src/sys/arch/alpha/alpha: pmap.c
Log Message:
>From the Infinitesimal Optimizations Department: in pmap_kremove(), update
the globally visible stats outside of the loop.
To generate a diff of this commit:
cvs rdiff -u -r1.273 -r1.274 src/sys/arch/alpha/alpha/pmap.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/arch/alpha/alpha/pmap.c
diff -u src/sys/arch/alpha/alpha/pmap.c:1.273 src/sys/arch/alpha/alpha/pmap.c:1.274
--- src/sys/arch/alpha/alpha/pmap.c:1.273 Fri Sep 11 03:54:14 2020
+++ src/sys/arch/alpha/alpha/pmap.c Tue Dec 29 17:16:15 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.273 2020/09/11 03:54:14 simonb Exp $ */
+/* $NetBSD: pmap.c,v 1.274 2020/12/29 17:16:15 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 1.273 2020/09/11 03:54:14 simonb Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.274 2020/12/29 17:16:15 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -2309,6 +2309,7 @@ pmap_kremove(vaddr_t va, vsize_t size)
pt_entry_t *pte, opte;
pmap_t const pmap = pmap_kernel();
struct pmap_tlb_context tlbctx;
+ int count = 0;
#ifdef DEBUG
if (pmapdebug & (PDB_FOLLOW|PDB_ENTER))
@@ -2330,12 +2331,16 @@ pmap_kremove(vaddr_t va, vsize_t size)
atomic_store_relaxed(pte, PG_NV);
pmap_tlb_shootdown(pmap, va, opte, &tlbctx);
- /* Update stats. */
- PMAP_STAT_DECR(pmap->pm_stats.resident_count, 1);
- PMAP_STAT_DECR(pmap->pm_stats.wired_count, 1);
+ count++;
}
}
+ /* Update stats. */
+ if (__predict_true(count != 0)) {
+ PMAP_STAT_DECR(pmap->pm_stats.resident_count, count);
+ PMAP_STAT_DECR(pmap->pm_stats.wired_count, count);
+ }
+
pmap_tlb_shootnow(&tlbctx);
TLB_COUNT(reason_kremove);
}
