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Commit 1075fbb2 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf python: Add perf.tracepoint method 



To get id of the tracepoint from subsystem and name strings. The
interface is:

  id = perf.tracepoint(sys, name)

In case of error -1 is returned.

It will be used to get python tracepoint event's config value for
tracepoint event.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1468148882-10362-7-git-send-email-jolsa@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 85e37de3

tools/perf/util/python.c

+26 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
#include <structmember.h>

#include <inttypes.h>

#include <poll.h>

#include <linux/err.h>

#include "evlist.h"

#include "evsel.h"

#include "event.h"
@@ -1076,7 +1077,32 @@ static struct { 
	{ .name = NULL, },

};



static PyObject *pyrf__tracepoint(struct pyrf_evsel *pevsel,

				  PyObject *args, PyObject *kwargs)

{

	struct event_format *tp_format;

	static char *kwlist[] = { "sys", "name", NULL };

	char *sys  = NULL;

	char *name = NULL;



	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|ss", kwlist,

					 &sys, &name))

		return NULL;



	tp_format = trace_event__tp_format(sys, name);

	if (IS_ERR(tp_format))

		return PyInt_FromLong(-1);



	return PyInt_FromLong(tp_format->id);

}



static PyMethodDef perf__methods[] = {

	{

		.ml_name  = "tracepoint",

		.ml_meth  = (PyCFunction) pyrf__tracepoint,

		.ml_flags = METH_VARARGS | METH_KEYWORDS,

		.ml_doc	  = PyDoc_STR("Get tracepoint config.")

	},

	{ .ml_name = NULL, }

};