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Message-ID: <aC3TMl2MJL1_BASE@x1>
Date: Wed, 21 May 2025 10:20:50 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Gautam Menghani <gautam@...ux.ibm.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>,
Howard Chu <howardchu95@...il.com>, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org, maddy@...ux.ibm.com
Subject: Re: [PATCH v3 4/7] perf python: Add support for perf_counts_values
to return counter data
On Mon, May 19, 2025 at 12:51:41PM -0700, Ian Rogers wrote:
> From: Gautam Menghani <gautam@...ux.ibm.com>
>
> Add support for perf_counts_values struct to enable the python
> bindings to read and return the counter data.
This (and another one in this series) are coming from Ian, that didn't
modify them, so we need a Signed-off-by: Ian, as per:
Documentation/process/submitting-patches.rst
---
Any further SoBs (Signed-off-by:'s) following the author's SoB are from
people handling and transporting the patch, but were not involved in its
development. SoB chains should reflect the **real** route a patch took
as it was propagated to the maintainers and ultimately to Linus, with
the first SoB entry signalling primary authorship of a single author.
---
I'm adding them to my local branch, please ack this,
Thanks,
- Arnaldo
> 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 ead3afd2d996..1cbddfe77c7c 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
>
> @@ -1475,7 +1561,8 @@ 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. */
> @@ -1520,6 +1607,9 @@ 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;
> --
> 2.49.0.1101.gccaa498523-goog
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