svn commit: r301922 - head/sys/sys
Mateusz Guzik
mjg at FreeBSD.org
Wed Jun 15 08:34:37 UTC 2016
Author: mjg
Date: Wed Jun 15 08:34:36 2016
New Revision: 301922
URL: https://svnweb.freebsd.org/changeset/base/301922
Log:
sdt: annotate the probe test as likely to fail
This saves a jump in plenty of cases.
Approved by: re (kib)
MFC after: 1 week
Modified:
head/sys/sys/sdt.h
Modified: head/sys/sys/sdt.h
==============================================================================
--- head/sys/sys/sdt.h Wed Jun 15 06:42:30 2016 (r301921)
+++ head/sys/sys/sdt.h Wed Jun 15 08:34:36 2016 (r301922)
@@ -161,7 +161,7 @@ SET_DECLARE(sdt_argtypes_set, struct sdt
extern struct sdt_probe sdt_##prov##_##mod##_##func##_##name[1]
#define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) do { \
- if (sdt_##prov##_##mod##_##func##_##name->id) \
+ if (__predict_false(sdt_##prov##_##mod##_##func##_##name->id)) \
(*sdt_probe_func)(sdt_##prov##_##mod##_##func##_##name->id, \
(uintptr_t) arg0, (uintptr_t) arg1, (uintptr_t) arg2, \
(uintptr_t) arg3, (uintptr_t) arg4); \
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