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SubjectRe: [PATCH 1/5] ftrace perf: Check sample types only for sampling events
On Tue, Mar 15, 2016 at 04:06:46PM -0400, Steven Rostedt wrote:
> On Wed, 9 Mar 2016 21:46:41 +0100
> Jiri Olsa <jolsa@kernel.org> 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?

right ;-)

jirka

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