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AJvYcCVcdMG5wiWqzTH5U0/xc3oHNTB+TrTsOXIZjRQrpyX+PwCkT0CI8PqaW1wjK9pJlkmi1bCVVVgf+TZlhio=@vger.kernel.org X-Gm-Message-State: AOJu0Yz1CP5lKItpzh/o9qbQrLly2H1AftedJjkrZ0Ue/1QwSW0m1Kx2 EeCPN2S+18jp9Y2FbxMoPtG9PHPxTJiXTuSQsWl3z3J6zVkBCNK1ZT6QgdQjKm1tkreq60j5UdU 65XNJnpqIAQ== X-Google-Smtp-Source: AGHT+IHT6Yev26RC90YfzMfnzP3PbAYr9CxK1jbMxB7Z8IIbdYP59V9Rv/RmXqz2mIPJoxn4nStyu/gZufvF X-Received: from pjvf6.prod.google.com ([2002:a17:90a:da86:b0:311:c197:70a4]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2e0d:b0:31e:3bbc:e9e6 with SMTP id 98e67ed59e1d1-31e507e61a5mr7085372a91.19.1753312996032; Wed, 23 Jul 2025 16:23:16 -0700 (PDT) Date: Wed, 23 Jul 2025 16:22:10 -0700 In-Reply-To: <20250723232217.516179-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250723232217.516179-1-irogers@google.com> X-Mailer: git-send-email 2.50.0.727.gbf7dc18ff4-goog Message-ID: <20250723232217.516179-10-irogers@google.com> Subject: [PATCH v8 09/16] perf python: Add basic PMU abstraction and pmus sequence From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , Xu Yang , "Masami Hiramatsu (Google)" , Collin Funk , Howard Chu , Weilin Wang , Andi Kleen , "Dr. David Alan Gilbert" , Thomas Richter , Tiezhu Yang , Gautam Menghani , Thomas Falcon , Chun-Tse Shao , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Arnaldo Carvalho de Melo Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add an ability to iterate over PMUs and a basic PMU type then can just show the PMU's name. An example usage: ``` $ python Python 3.12.9 (main, Feb 5 2025, 01:31:18) [GCC 14.2.0] on linux >>> import perf >>> list(perf.pmus()) [pmu(cpu), pmu(breakpoint), pmu(cstate_core), pmu(cstate_pkg), pmu(hwmon_acpitz), pmu(hwmon_ac), pmu(hwmon_bat0), pmu(hwmon_coretemp), pmu(hwmon_iwlwifi_1), pmu(hwmon_nvme), pmu(hwmon_thinkpad), pmu(hwmon_ucsi_source_psy_usbc000_0), pmu(hwmon_ucsi_source_psy_usbc000_0), pmu(i915), pmu(intel_bts), pmu(intel_pt), pmu(kprobe), pmu(msr), pmu(power), pmu(software), pmu(tool), pmu(tracepoint), pmu(uncore_arb), pmu(uncore_cbox_0), pmu(uncore_cbox_1), pmu(uncore_cbox_2), pmu(uncore_cbox_3), pmu(uncore_cbox_4), pmu(uncore_cbox_5), pmu(uncore_cbox_6), pmu(uncore_cbox_7), pmu(uncore_clock), pmu(uncore_imc_free_running_0), pmu(uncore_imc_free_running_1), pmu(uprobe)] ``` Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo --- tools/perf/util/python.c | 140 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 140 insertions(+) diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index 9c9972d77d1e..ddcb5d40ff14 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -639,6 +639,138 @@ static int pyrf_thread_map__setup_types(void) return PyType_Ready(&pyrf_thread_map__type); } =20 +/** + * A python wrapper for perf_pmus that are globally owned by the pmus.c co= de. + */ +struct pyrf_pmu { + PyObject_HEAD + + struct perf_pmu *pmu; +}; + +static void pyrf_pmu__delete(struct pyrf_pmu *ppmu) +{ + Py_TYPE(ppmu)->tp_free((PyObject *)ppmu); +} + +static PyObject *pyrf_pmu__name(PyObject *self) +{ + struct pyrf_pmu *ppmu =3D (void *)self; + + return PyUnicode_FromString(ppmu->pmu->name); +} + +static PyObject *pyrf_pmu__repr(PyObject *self) +{ + struct pyrf_pmu *ppmu =3D (void *)self; + + return PyUnicode_FromFormat("pmu(%s)", ppmu->pmu->name); +} + +static const char pyrf_pmu__doc[] =3D PyDoc_STR("perf Performance Monitori= ng Unit (PMU) object."); + +static PyMethodDef pyrf_pmu__methods[] =3D { + { + .ml_name =3D "name", + .ml_meth =3D (PyCFunction)pyrf_pmu__name, + .ml_flags =3D METH_NOARGS, + .ml_doc =3D PyDoc_STR("Name of the PMU including suffixes.") + }, + { .ml_name =3D NULL, } +}; + +/** The python type for a perf.pmu. */ +static PyTypeObject pyrf_pmu__type =3D { + PyVarObject_HEAD_INIT(NULL, 0) + .tp_name =3D "perf.pmu", + .tp_basicsize =3D sizeof(struct pyrf_pmu), + .tp_dealloc =3D (destructor)pyrf_pmu__delete, + .tp_flags =3D Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, + .tp_doc =3D pyrf_pmu__doc, + .tp_methods =3D pyrf_pmu__methods, + .tp_str =3D pyrf_pmu__name, + .tp_repr =3D pyrf_pmu__repr, +}; + +static int pyrf_pmu__setup_types(void) +{ + pyrf_pmu__type.tp_new =3D PyType_GenericNew; + return PyType_Ready(&pyrf_pmu__type); +} + + +/** A python iterator for pmus that has no equivalent in the C code. */ +struct pyrf_pmu_iterator { + PyObject_HEAD + struct perf_pmu *pmu; +}; + +static void pyrf_pmu_iterator__dealloc(struct pyrf_pmu_iterator *self) +{ + Py_TYPE(self)->tp_free((PyObject *) self); +} + +static PyObject *pyrf_pmu_iterator__new(PyTypeObject *type, PyObject *args= __maybe_unused, + PyObject *kwds __maybe_unused) +{ + struct pyrf_pmu_iterator *itr =3D (void *)type->tp_alloc(type, 0); + + if (itr !=3D NULL) + itr->pmu =3D perf_pmus__scan(/*pmu=3D*/NULL); + + return (PyObject *) itr; +} + +static PyObject *pyrf_pmu_iterator__iter(PyObject *self) +{ + Py_INCREF(self); + return self; +} + +static PyObject *pyrf_pmu_iterator__iternext(PyObject *self) +{ + struct pyrf_pmu_iterator *itr =3D (void *)self; + struct pyrf_pmu *ppmu; + + if (itr->pmu =3D=3D NULL) { + PyErr_SetNone(PyExc_StopIteration); + return NULL; + } + // Create object to return. + ppmu =3D PyObject_New(struct pyrf_pmu, &pyrf_pmu__type); + if (ppmu) { + ppmu->pmu =3D itr->pmu; + // Advance iterator. + itr->pmu =3D perf_pmus__scan(itr->pmu); + } + return (PyObject *)ppmu; +} + +/** The python type for the PMU iterator. */ +static PyTypeObject pyrf_pmu_iterator__type =3D { + PyVarObject_HEAD_INIT(NULL, 0) + .tp_name =3D "pmus.iterator", + .tp_doc =3D "Iterator for the pmus string sequence.", + .tp_basicsize =3D sizeof(struct pyrf_pmu_iterator), + .tp_itemsize =3D 0, + .tp_flags =3D Py_TPFLAGS_DEFAULT, + .tp_new =3D pyrf_pmu_iterator__new, + .tp_dealloc =3D (destructor) pyrf_pmu_iterator__dealloc, + .tp_iter =3D pyrf_pmu_iterator__iter, + .tp_iternext =3D pyrf_pmu_iterator__iternext, +}; + +static int pyrf_pmu_iterator__setup_types(void) +{ + return PyType_Ready(&pyrf_pmu_iterator__type); +} + +static PyObject *pyrf__pmus(PyObject *self, PyObject *args) +{ + // Calling the class creates an instance of the iterator. + return PyObject_CallObject((PyObject *) &pyrf_pmu_iterator__type, /*args= =3D*/NULL); +} + struct pyrf_counts_values { PyObject_HEAD =20 @@ -1691,6 +1823,12 @@ static PyMethodDef perf__methods[] =3D { .ml_flags =3D METH_VARARGS, .ml_doc =3D PyDoc_STR("Parse a string of events and return an evlist.") }, + { + .ml_name =3D "pmus", + .ml_meth =3D (PyCFunction) pyrf__pmus, + .ml_flags =3D METH_NOARGS, + .ml_doc =3D PyDoc_STR("Returns a sequence of pmus.") + }, { .ml_name =3D NULL, } }; =20 @@ -1718,6 +1856,8 @@ PyMODINIT_FUNC PyInit_perf(void) pyrf_evsel__setup_types() < 0 || pyrf_thread_map__setup_types() < 0 || pyrf_cpu_map__setup_types() < 0 || + pyrf_pmu_iterator__setup_types() < 0 || + pyrf_pmu__setup_types() < 0 || pyrf_counts_values__setup_types() < 0) return module; =20 --=20 2.50.0.727.gbf7dc18ff4-goog