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| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-01-19 16:57:14 +0300 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-01-19 16:57:14 +0300 |
| commit | 134e6a034cb004ed5acd3048792de70ced1c6cf5 (patch) | |
| tree | b4947b475cca5c6c9b5ec78685d0b40e26943518 /include/linux/compiler.h | |
| parent | d45ae1f7041ac52ade6c5ec76d96bbed765d67aa (diff) | |
| download | linux-134e6a034cb004ed5acd3048792de70ced1c6cf5.tar.xz | |
tracing: Show number of constants profiled in likely profiler
Now that constants are traced, it is useful to see the number of constants
that are traced in the likely/unlikely profiler in order to know if they
should be ignored or not.
The likely/unlikely will display a number after the "correct" number if a
"constant" count exists.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/compiler.h')
| -rw-r--r-- | include/linux/compiler.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index bbbe1570de1c..a73cc9afa784 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -101,13 +101,18 @@ struct ftrace_branch_data { }; }; +struct ftrace_likely_data { + struct ftrace_branch_data data; + unsigned long constant; +}; + /* * Note: DISABLE_BRANCH_PROFILING can be used by special lowlevel code * to disable branch tracing on a per file basis. */ #if defined(CONFIG_TRACE_BRANCH_PROFILING) \ && !defined(DISABLE_BRANCH_PROFILING) && !defined(__CHECKER__) -void ftrace_likely_update(struct ftrace_branch_data *f, int val, +void ftrace_likely_update(struct ftrace_likely_data *f, int val, int expect, int is_constant); #define likely_notrace(x) __builtin_expect(!!(x), 1) @@ -115,13 +120,13 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, #define __branch_check__(x, expect, is_constant) ({ \ int ______r; \ - static struct ftrace_branch_data \ + static struct ftrace_likely_data \ __attribute__((__aligned__(4))) \ __attribute__((section("_ftrace_annotated_branch"))) \ ______f = { \ - .func = __func__, \ - .file = __FILE__, \ - .line = __LINE__, \ + .data.func = __func__, \ + .data.file = __FILE__, \ + .data.line = __LINE__, \ }; \ ______r = __builtin_expect(!!(x), expect); \ ftrace_likely_update(&______f, ______r, \ |