linux-kernel - [PATCH v9 08/16] perf python: Improve the tracepoint function if no libtraceevent

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Message-ID: <20250725185202.68671-9-irogers@google.com>
Date: Fri, 25 Jul 2025 11:51:54 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, James Clark <james.clark@...aro.org>, 
	Xu Yang <xu.yang_2@....com>, "Masami Hiramatsu (Google)" <mhiramat@...nel.org>, 
	Collin Funk <collin.funk1@...il.com>, Howard Chu <howardchu95@...il.com>, 
	Weilin Wang <weilin.wang@...el.com>, Andi Kleen <ak@...ux.intel.com>, 
	"Dr. David Alan Gilbert" <linux@...blig.org>, Thomas Richter <tmricht@...ux.ibm.com>, 
	Tiezhu Yang <yangtiezhu@...ngson.cn>, Gautam Menghani <gautam@...ux.ibm.com>, 
	Thomas Falcon <thomas.falcon@...el.com>, Chun-Tse Shao <ctshao@...gle.com>, 
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH v9 08/16] perf python: Improve the tracepoint function if no libtraceevent

The tracepoint function just returns the tracepoint id, this doesn't
require libtraceevent which is only used for parsing the event format
data. Implement the function using the id function in tp_pmu. No
current code in perf is using this, the previous code migrated to
perf.parse_events, but it feels good to have less ifdef
HAVE_LIBTRACEEVENT.

Signed-off-by: Ian Rogers <irogers@...gle.com>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/python.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 3affde0ad15a..9c9972d77d1e 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -18,6 +18,7 @@
 #include "record.h"
 #include "strbuf.h"
 #include "thread_map.h"
+#include "tp_pmu.h"
 #include "trace-event.h"
 #include "metricgroup.h"
 #include "mmap.h"
@@ -1544,10 +1545,6 @@ static const struct perf_constant perf__constants[] = {
 static PyObject *pyrf__tracepoint(struct pyrf_evsel *pevsel,
 				  PyObject *args, PyObject *kwargs)
 {
-#ifndef HAVE_LIBTRACEEVENT
-	return NULL;
-#else
-	struct tep_event *tp_format;
 	static char *kwlist[] = { "sys", "name", NULL };
 	char *sys  = NULL;
 	char *name = NULL;
@@ -1556,12 +1553,7 @@ static PyObject *pyrf__tracepoint(struct pyrf_evsel *pevsel,
 					 &sys, &name))
 		return NULL;
 
-	tp_format = trace_event__tp_format(sys, name);
-	if (IS_ERR(tp_format))
-		return PyLong_FromLong(-1);
-
-	return PyLong_FromLong(tp_format->id);
-#endif // HAVE_LIBTRACEEVENT
+	return PyLong_FromLong(tp_pmu__id(sys, name));
 }
 
 static PyObject *pyrf_evsel__from_evsel(struct evsel *evsel)
-- 
2.50.1.552.g942d659e1b-goog