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

From Steven Rostedt <rostedt@goodmis.org>
Newsgroups linux.kernel
Subject Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling events
Date 2016-03-15 21:10 +0100
Message-ID <rd3rX-73e-9@gated-at.bofh.it> (permalink)
References <raTdn-4Ll-3@gated-at.bofh.it> <raTdn-4Ll-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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?

-- Steve

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Thread

[PATCH 1/5] ftrace perf: Check sample types only for sampling events Jiri Olsa <jolsa@kernel.org> - 2016-03-09 21:50 +0100
  Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling  events Namhyung Kim <namhyung@kernel.org> - 2016-03-10 01:40 +0100
    Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling  events Jiri Olsa <jolsa@redhat.com> - 2016-03-10 08:30 +0100
      Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling  events Jiri Olsa <jolsa@redhat.com> - 2016-03-11 09:40 +0100
        Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling  events Namhyung Kim <namhyung@kernel.org> - 2016-03-11 14:50 +0100
          Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling  events Jiri Olsa <jolsa@redhat.com> - 2016-03-11 19:20 +0100
  Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling  events Steven Rostedt <rostedt@goodmis.org> - 2016-03-15 21:10 +0100
    Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling  events Jiri Olsa <jolsa@redhat.com> - 2016-03-15 23:00 +0100

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