Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling events

[Steven Rostedt]

On Wed,  9 Mar 2016 21:46:41 +0100
Jiri Olsa <jolsa@xxxxxxxxxx> wrote:

> Currently we check sample type for ftrace:function event
> even if it's not created as sampling event. That prevents
> creating ftrace_function event in counting mode.
> 
> Making sure we check sample types only for sampling events.
> 
> Before:
>   $ sudo perf stat -e ftrace:function ls
>   ...
> 
>    Performance counter stats for 'ls':
> 
>      <not supported>      ftrace:function
> 
>          0.001983662 seconds time elapsed
> 
> After:
>   $ sudo perf stat -e ftrace:function ls

I'm assuming you gave yourself admin capabilities, and not any normal
user may sample function tracing, right?

-- Steve