Module Name: src
Committed By: cherry
Date: Tue Dec 27 07:47:01 UTC 2011
Modified Files:
src/sys/arch/xen/x86: hypervisor_machdep.c
Log Message:
Optimise branch predict hint for the intended use-case (cross cpu event
notification)
To generate a diff of this commit:
cvs rdiff -u -r1.20 -r1.21 src/sys/arch/xen/x86/hypervisor_machdep.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/xen/x86/hypervisor_machdep.c
diff -u src/sys/arch/xen/x86/hypervisor_machdep.c:1.20 src/sys/arch/xen/x86/hypervisor_machdep.c:1.21
--- src/sys/arch/xen/x86/hypervisor_machdep.c:1.20 Tue Dec 27 07:45:41 2011
+++ src/sys/arch/xen/x86/hypervisor_machdep.c Tue Dec 27 07:47:00 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: hypervisor_machdep.c,v 1.20 2011/12/27 07:45:41 cherry Exp $ */
+/* $NetBSD: hypervisor_machdep.c,v 1.21 2011/12/27 07:47:00 cherry Exp $ */
/*
*
@@ -54,7 +54,7 @@
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: hypervisor_machdep.c,v 1.20 2011/12/27 07:45:41 cherry Exp $");
+__KERNEL_RCSID(0, "$NetBSD: hypervisor_machdep.c,v 1.21 2011/12/27 07:47:00 cherry Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -296,7 +296,7 @@ hypervisor_send_event(struct cpu_info *c
xen_atomic_set_bit(&s->evtchn_pending[0], ev);
- if (__predict_true(ci == curcpu())) {
+ if (__predict_false(ci == curcpu())) {
xen_atomic_set_bit(&vci->evtchn_pending_sel,
ev >> LONG_SHIFT);
xen_atomic_set_bit(&vci->evtchn_upcall_pending, 0);
