On Fri, 2013-04-26 at 07:34 -0600, David Ahern wrote:
> On 4/25/13 7:05 AM, Steven Rostedt wrote:
> > Perf was added in 2.6.31, but do all
> > functionalities still work that far back?
>
>
> perf was accepted into 2.6.28 - first commit is 0793a61d.
That's kernel side.
>
> It does have limite
On 4/25/13 7:05 AM, Steven Rostedt wrote:
Perf was added in 2.6.31, but do all
functionalities still work that far back?
perf was accepted into 2.6.28 - first commit is 0793a61d.
It does have limited functionality (H/W and S/W counters) until 2.6.31.
David
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On Thu, Apr 25, 2013 at 09:05:21AM -0400, Steven Rostedt wrote:
> On Thu, 2013-04-25 at 18:51 +0900, Namhyung Kim wrote:
> > >
> > >>
> > >> Do you mean it should be changed to
> > >>
> > >> if (write_tracing_file("set_ftrace_pid", "-1") < 0)
> > >>
> > >> ? It seems it's the right thing to do
On Thu, 2013-04-25 at 18:51 +0900, Namhyung Kim wrote:
> >
> >>
> >> Do you mean it should be changed to
> >>
> >>if (write_tracing_file("set_ftrace_pid", "-1") < 0)
> >>
> >> ? It seems it's the right thing to do for compatibility.
> >
> >
> > looks like it's enough only to open it with O_
On Thu, 25 Apr 2013 11:09:56 +0200, Jiri Olsa wrote:
> On Thu, Apr 25, 2013 at 03:06:37PM +0900, Namhyung Kim wrote:
>> On Wed, 24 Apr 2013 16:09:18 +0200, Jiri Olsa wrote:
>> > On Tue, Apr 23, 2013 at 05:31:03PM +0900, Namhyung Kim wrote:
>> >> From: Namhyung Kim
>> >> +out:
>> >> + put_tracing_f
On Thu, Apr 25, 2013 at 03:06:37PM +0900, Namhyung Kim wrote:
> On Wed, 24 Apr 2013 16:09:18 +0200, Jiri Olsa wrote:
> > On Tue, Apr 23, 2013 at 05:31:03PM +0900, Namhyung Kim wrote:
> >> From: Namhyung Kim
> >> +out:
> >> + put_tracing_file(file);
> >> + return ret;
> >> +}
> >> +
> >> +static
On Wed, 24 Apr 2013 16:09:18 +0200, Jiri Olsa wrote:
> On Tue, Apr 23, 2013 at 05:31:03PM +0900, Namhyung Kim wrote:
>> From: Namhyung Kim
>> +out:
>> +put_tracing_file(file);
>> +return ret;
>> +}
>> +
>> +static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused)
>> +{
>>
On Tue, Apr 23, 2013 at 05:31:03PM +0900, Namhyung Kim wrote:
> From: Namhyung Kim
>
SNIP
> +out:
> + put_tracing_file(file);
> + return ret;
> +}
> +
> +static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused)
> +{
> + if (write_tracing_file("tracing_on", "0") < 0)
From: Namhyung Kim
The ftrace command is a simple wrapper of kernel's ftrace
functionality. It only supports single thread tracing currently and
just reads trace_pipe in text and then write it to stdout.
Cc: Steven Rostedt
Cc: Frederic Weisbecker
Signed-off-by: Namhyung Kim
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tools/perf/M
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