linux-kernel - [RFC PATCH v1 10/15] perf python: Add wrapper for perf

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Message-ID: <20251029053413.355154-11-irogers@google.com>
Date: Tue, 28 Oct 2025 22:34:08 -0700
From: Ian Rogers <irogers@...gle.com>
To: Suzuki K Poulose <suzuki.poulose@....com>, Mike Leach <mike.leach@...aro.org>, 
	James Clark <james.clark@...aro.org>, John Garry <john.g.garry@...cle.com>, 
	Will Deacon <will@...nel.org>, Leo Yan <leo.yan@...ux.dev>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Charlie Jenkins <charlie@...osinc.com>, 
	Thomas Falcon <thomas.falcon@...el.com>, Yicong Yang <yangyicong@...ilicon.com>, 
	Thomas Richter <tmricht@...ux.ibm.com>, Athira Rajeev <atrajeev@...ux.ibm.com>, 
	Howard Chu <howardchu95@...il.com>, Song Liu <song@...nel.org>, 
	Dapeng Mi <dapeng1.mi@...ux.intel.com>, Levi Yun <yeoreum.yun@....com>, 
	Zhongqiu Han <quic_zhonhan@...cinc.com>, Blake Jones <blakejones@...gle.com>, 
	Anubhav Shelat <ashelat@...hat.com>, Chun-Tse Shao <ctshao@...gle.com>, 
	Christophe Leroy <christophe.leroy@...roup.eu>, 
	Jean-Philippe Romain <jean-philippe.romain@...s.st.com>, Gautam Menghani <gautam@...ux.ibm.com>, 
	Dmitry Vyukov <dvyukov@...gle.com>, Yang Li <yang.lee@...ux.alibaba.com>, 
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, 
	Andi Kleen <ak@...ux.intel.com>, Weilin Wang <weilin.wang@...el.com>
Subject: [RFC PATCH v1 10/15] perf python: Add wrapper for perf_data file abstraction

The perf_data struct is needed for session supported.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/python.c | 62 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 61 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 0366142184d8..f96c1f6dca56 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -11,6 +11,7 @@
 #include <perf/mmap.h>
 #include "callchain.h"
 #include "counts.h"
+#include "data.h"
 #include "evlist.h"
 #include "evsel.h"
 #include "event.h"
@@ -2163,6 +2164,61 @@ static PyObject *pyrf__metrics(PyObject *self, PyObject *args)
 	return list;
 }
 
+struct pyrf_data {
+	PyObject_HEAD
+
+	struct perf_data data;
+};
+
+static int pyrf_data__init(struct pyrf_data *pdata, PyObject *args, PyObject *kwargs)
+{
+	static char *kwlist[] = { "path", "fd", NULL };
+	char *path = NULL;
+	int fd = -1;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|si", kwlist, &path, &fd))
+		return -1;
+
+	pdata->data.path = strdup(path);
+	pdata->data.mode = PERF_DATA_MODE_READ;
+	pdata->data.file.fd = fd;
+	return perf_data__open(&pdata->data) < 0 ? -1 : 0;
+}
+
+static void pyrf_data__delete(struct pyrf_data *pdata)
+{
+	perf_data__close(&pdata->data);
+	free((char *)pdata->data.path);
+	Py_TYPE(pdata)->tp_free((PyObject *)pdata);
+}
+
+static PyObject *pyrf_data__str(PyObject *self)
+{
+	const struct pyrf_data *pdata = (const struct pyrf_data *)self;
+
+	return PyUnicode_FromString(pdata->data.path);
+}
+
+static const char pyrf_data__doc[] = PyDoc_STR("perf data file object.");
+
+static PyTypeObject pyrf_data__type = {
+	PyVarObject_HEAD_INIT(NULL, 0)
+	.tp_name	= "perf.data",
+	.tp_basicsize	= sizeof(struct pyrf_data),
+	.tp_dealloc	= (destructor)pyrf_data__delete,
+	.tp_flags	= Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
+	.tp_doc		= pyrf_data__doc,
+	.tp_init	= (initproc)pyrf_data__init,
+	.tp_repr	= pyrf_data__str,
+	.tp_str		= pyrf_data__str,
+};
+
+static int pyrf_data__setup_types(void)
+{
+	pyrf_data__type.tp_new = PyType_GenericNew;
+	return PyType_Ready(&pyrf_data__type);
+}
+
 static PyMethodDef perf__methods[] = {
 	{
 		.ml_name  = "metrics",
@@ -2225,7 +2281,8 @@ PyMODINIT_FUNC PyInit_perf(void)
 	    pyrf_cpu_map__setup_types() < 0 ||
 	    pyrf_pmu_iterator__setup_types() < 0 ||
 	    pyrf_pmu__setup_types() < 0 ||
-	    pyrf_counts_values__setup_types() < 0)
+	    pyrf_counts_values__setup_types() < 0 ||
+	    pyrf_data__setup_types() < 0)
 		return module;
 
 	/* The page_size is placed in util object. */
@@ -2273,6 +2330,9 @@ PyMODINIT_FUNC PyInit_perf(void)
 	Py_INCREF(&pyrf_counts_values__type);
 	PyModule_AddObject(module, "counts_values", (PyObject *)&pyrf_counts_values__type);
 
+	Py_INCREF(&pyrf_data__type);
+	PyModule_AddObject(module, "data", (PyObject *)&pyrf_data__type);
+
 	dict = PyModule_GetDict(module);
 	if (dict == NULL)
 		goto error;
-- 
2.51.1.851.g4ebd6896fd-goog