Author: attilio
Date: Tue Jan 7 14:03:42 2014
New Revision: 260393
URL: http://svnweb.freebsd.org/changeset/base/260393
Log:
Use __predict_false() on sensitive lock paths as most of the times,
when PMC-soft feature is not used the check will be false.
Sponsored by: EMC / Isilon storage division
Submitted by: Anton Rang <anton.r...@isilon.com>
Modified:
head/sys/sys/pmckern.h
Modified: head/sys/sys/pmckern.h
==============================================================================
--- head/sys/sys/pmckern.h Tue Jan 7 13:09:35 2014 (r260392)
+++ head/sys/sys/pmckern.h Tue Jan 7 14:03:42 2014 (r260393)
@@ -110,7 +110,7 @@ struct pmckern_soft {
#ifdef PMC_FAKE_TRAPFRAME
#define PMC_SOFT_CALL(pr, mo, fu, na)
\
do {
\
- if (pmc_##pr##_##mo##_##fu##_##na.ps_running) {
\
+ if (__predict_false(pmc_##pr##_##mo##_##fu##_##na.ps_running)) {
\
struct pmckern_soft ks;
\
register_t intr;
\
intr = intr_disable();
\
@@ -135,7 +135,7 @@ do {
\
*/
#define PMC_SOFT_CALL_TF(pr, mo, fu, na, tf)
\
do {
\
- if (pmc_##pr##_##mo##_##fu##_##na.ps_running) {
\
+ if (__predict_false(pmc_##pr##_##mo##_##fu##_##na.ps_running)) {
\
struct pmckern_soft ks;
\
register_t intr;
\
intr = intr_disable();
\
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