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Message-ID: <20250501093633.578010-2-gautam@linux.ibm.com>
Date: Thu, 1 May 2025 15:06:27 +0530
From: Gautam Menghani <gautam@...ux.ibm.com>
To: peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
namhyung@...nel.org, mark.rutland@....com,
alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
irogers@...gle.com, adrian.hunter@...el.com, kan.liang@...ux.intel.com
Cc: Gautam Menghani <gautam@...ux.ibm.com>, linux-perf-users@...r.kernel.org,
linux-kernel@...r.kernel.org, maddy@...ux.ibm.com
Subject: [PATCH 1/4] perf python: Add support for perf_counts_values to return counter data
Add bindings for perf_counts_values struct to enable the python scripts
to read the counter data for an event.
Signed-off-by: Gautam Menghani <gautam@...ux.ibm.com>
---
tools/perf/util/python.c | 92 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 91 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index f3c05da25b4a..011ee2e27797 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -626,6 +626,92 @@ static int pyrf_thread_map__setup_types(void)
return PyType_Ready(&pyrf_thread_map__type);
}
+struct pyrf_counts_values {
+ PyObject_HEAD
+
+ struct perf_counts_values values;
+};
+
+static const char pyrf_counts_values__doc[] = PyDoc_STR("perf counts values object.");
+
+static void pyrf_counts_values__delete(struct pyrf_counts_values *pcounts_values)
+{
+ Py_TYPE(pcounts_values)->tp_free((PyObject *)pcounts_values);
+}
+
+#define counts_values_member_def(member, ptype, help) \
+ { #member, ptype, \
+ offsetof(struct pyrf_counts_values, values.member), \
+ 0, help }
+
+static PyMemberDef pyrf_counts_values_members[] = {
+ counts_values_member_def(val, Py_T_ULONG, "Value of event"),
+ counts_values_member_def(ena, Py_T_ULONG, "Time for which enabled"),
+ counts_values_member_def(run, Py_T_ULONG, "Time for which running"),
+ counts_values_member_def(id, Py_T_ULONG, "Unique ID for an event"),
+ counts_values_member_def(lost, Py_T_ULONG, "Num of lost samples"),
+ {NULL}
+};
+
+static PyObject *pyrf_counts_values_get_values(struct pyrf_counts_values *self, void *closure)
+{
+ PyObject *vals = PyList_New(5);
+
+ if (!vals)
+ return NULL;
+ for (int i = 0; i < 5; i++)
+ PyList_SetItem(vals, i, PyLong_FromLong(self->values.values[i]));
+
+ return vals;
+}
+
+static int pyrf_counts_values_set_values(struct pyrf_counts_values *self, PyObject *list,
+ void *closure)
+{
+ Py_ssize_t size;
+ PyObject *item = NULL;
+
+ if (!PyList_Check(list)) {
+ PyErr_SetString(PyExc_TypeError, "Value assigned must be a list");
+ return -1;
+ }
+
+ size = PyList_Size(list);
+ for (Py_ssize_t i = 0; i < size; i++) {
+ item = PyList_GetItem(list, i);
+ if (!PyLong_Check(item)) {
+ PyErr_SetString(PyExc_TypeError, "List members should be numbers");
+ return -1;
+ }
+ self->values.values[i] = PyLong_AsLong(item);
+ }
+
+ return 0;
+}
+
+static PyGetSetDef pyrf_counts_values_getset[] = {
+ {"values", (getter)pyrf_counts_values_get_values, (setter)pyrf_counts_values_set_values,
+ "Name field", NULL},
+ {NULL}
+};
+
+static PyTypeObject pyrf_counts_values__type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ .tp_name = "perf.counts_values",
+ .tp_basicsize = sizeof(struct pyrf_counts_values),
+ .tp_dealloc = (destructor)pyrf_counts_values__delete,
+ .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
+ .tp_doc = pyrf_counts_values__doc,
+ .tp_members = pyrf_counts_values_members,
+ .tp_getset = pyrf_counts_values_getset,
+};
+
+static int pyrf_counts_values__setup_types(void)
+{
+ pyrf_counts_values__type.tp_new = PyType_GenericNew;
+ return PyType_Ready(&pyrf_counts_values__type);
+}
+
struct pyrf_evsel {
PyObject_HEAD
@@ -1442,7 +1528,8 @@ PyMODINIT_FUNC PyInit_perf(void)
pyrf_evlist__setup_types() < 0 ||
pyrf_evsel__setup_types() < 0 ||
pyrf_thread_map__setup_types() < 0 ||
- pyrf_cpu_map__setup_types() < 0)
+ pyrf_cpu_map__setup_types() < 0 ||
+ pyrf_counts_values__setup_types() < 0)
return module;
/* The page_size is placed in util object. */
@@ -1487,6 +1574,9 @@ PyMODINIT_FUNC PyInit_perf(void)
Py_INCREF(&pyrf_cpu_map__type);
PyModule_AddObject(module, "cpu_map", (PyObject*)&pyrf_cpu_map__type);
+ Py_INCREF(&pyrf_counts_values__type);
+ PyModule_AddObject(module, "counts_values", (PyObject *)&pyrf_counts_values__type);
+
dict = PyModule_GetDict(module);
if (dict == NULL)
goto error;
--
2.49.0
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