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| author | Steven Rostedt <srostedt@redhat.com> | 2009-03-24 04:12:58 +0100 |
|---|---|---|
| committer | Steven Rostedt <srostedt@redhat.com> | 2009-03-25 04:41:09 +0100 |
| commit | 0706f1c48ca8a7ab478090b4e38f2e578ae2bfe0 (patch) | |
| tree | 26b79090f8e7e62796bb871ff089d04799919855 /kernel/trace/trace_output.h | |
| parent | tracing: move function profiler data out of function struct (diff) | |
| download | linux-0706f1c48ca8a7ab478090b4e38f2e578ae2bfe0.tar.xz linux-0706f1c48ca8a7ab478090b4e38f2e578ae2bfe0.zip | |
tracing: adding function timings to function profiler
If the function graph trace is enabled, the function profiler will
use it to take the timing of the functions.
cat /debug/tracing/trace_stat/functions
Function Hit Time
-------- --- ----
mwait_idle 127 183028.4 us
schedule 26 151997.7 us
__schedule 31 151975.1 us
sys_wait4 2 74080.53 us
do_wait 2 74077.80 us
sys_newlstat 138 39929.16 us
do_path_lookup 179 39845.79 us
vfs_lstat_fd 138 39761.97 us
user_path_at 153 39469.58 us
path_walk 179 39435.76 us
__link_path_walk 189 39143.73 us
[...]
Note the times are skewed due to the function graph tracer not taking
into account schedules.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'kernel/trace/trace_output.h')
| -rw-r--r-- | kernel/trace/trace_output.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h index 35c422fb51a9..1eac2973374e 100644 --- a/kernel/trace/trace_output.h +++ b/kernel/trace/trace_output.h @@ -20,6 +20,8 @@ trace_print_bprintk_msg_only(struct trace_iterator *iter); extern enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter); +extern void trace_print_seq(struct seq_file *m, struct trace_seq *s); + extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) __attribute__ ((format (printf, 2, 3))); extern int |