diff options
Diffstat (limited to 'scripts/tracing/draw_functrace.py')
-rw-r--r-- | scripts/tracing/draw_functrace.py | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/scripts/tracing/draw_functrace.py b/scripts/tracing/draw_functrace.py index 902f9a992620..db40fa04cd51 100644 --- a/scripts/tracing/draw_functrace.py +++ b/scripts/tracing/draw_functrace.py | |||
@@ -12,10 +12,9 @@ calls. Only the functions's names and the the call time are provided. | |||
12 | 12 | ||
13 | Usage: | 13 | Usage: |
14 | Be sure that you have CONFIG_FUNCTION_TRACER | 14 | Be sure that you have CONFIG_FUNCTION_TRACER |
15 | # mkdir /debugfs | 15 | # mount -t debugfs nodev /sys/kernel/debug |
16 | # mount -t debug debug /debug | 16 | # echo function > /sys/kernel/debug/tracing/current_tracer |
17 | # echo function > /debug/tracing/current_tracer | 17 | $ cat /sys/kernel/debug/tracing/trace_pipe > ~/raw_trace_func |
18 | $ cat /debug/tracing/trace_pipe > ~/raw_trace_func | ||
19 | Wait some times but not too much, the script is a bit slow. | 18 | Wait some times but not too much, the script is a bit slow. |
20 | Break the pipe (Ctrl + Z) | 19 | Break the pipe (Ctrl + Z) |
21 | $ scripts/draw_functrace.py < raw_trace_func > draw_functrace | 20 | $ scripts/draw_functrace.py < raw_trace_func > draw_functrace |