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authorSteven Rostedt <srostedt@redhat.com>2008-11-21 00:40:40 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-23 11:39:56 +0100
commit45b797492a0758e64dff74e9db70e1f65e0603a5 (patch)
tree75db13ee888a6c7f90c92c17a743bff8ce42d86a /include/linux/compiler.h
parent42f565e116e0408b5ddc21a33c4a4d41fd572420 (diff)
downloadop-kernel-dev-45b797492a0758e64dff74e9db70e1f65e0603a5.zip
op-kernel-dev-45b797492a0758e64dff74e9db70e1f65e0603a5.tar.gz
trace: consolidate unlikely and likely profiler
Impact: clean up to make one profiler of like and unlikely tracer The likely and unlikely profiler prints out the file and line numbers of the annotated branches that it is profiling. It shows the number of times it was correct or incorrect in its guess. Having two different files or sections for that matter to tell us if it was a likely or unlikely is pretty pointless. We really only care if it was correct or not. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/compiler.h')
-rw-r--r--include/linux/compiler.h24
1 files changed, 5 insertions, 19 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index c25e525..0628a20 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -77,32 +77,18 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
#define likely_notrace(x) __builtin_expect(!!(x), 1)
#define unlikely_notrace(x) __builtin_expect(!!(x), 0)
-#define likely_check(x) ({ \
+#define __branch_check__(x, expect) ({ \
int ______r; \
static struct ftrace_branch_data \
__attribute__((__aligned__(4))) \
- __attribute__((section("_ftrace_likely"))) \
+ __attribute__((section("_ftrace_annotated_branch"))) \
______f = { \
.func = __func__, \
.file = __FILE__, \
.line = __LINE__, \
}; \
______r = likely_notrace(x); \
- ftrace_likely_update(&______f, ______r, 1); \
- ______r; \
- })
-#define unlikely_check(x) ({ \
- int ______r; \
- static struct ftrace_branch_data \
- __attribute__((__aligned__(4))) \
- __attribute__((section("_ftrace_unlikely"))) \
- ______f = { \
- .func = __func__, \
- .file = __FILE__, \
- .line = __LINE__, \
- }; \
- ______r = unlikely_notrace(x); \
- ftrace_likely_update(&______f, ______r, 0); \
+ ftrace_likely_update(&______f, ______r, expect); \
______r; \
})
@@ -112,10 +98,10 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
* written by Daniel Walker.
*/
# ifndef likely
-# define likely(x) (__builtin_constant_p(x) ? !!(x) : likely_check(x))
+# define likely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 1))
# endif
# ifndef unlikely
-# define unlikely(x) (__builtin_constant_p(x) ? !!(x) : unlikely_check(x))
+# define unlikely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0))
# endif
#else
# define likely(x) __builtin_expect(!!(x), 1)
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