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AJvYcCV9piBZYuW8BaJceiOAbiNNcYItIfBJbjLlFUaGNYC9977niLFItxQcGMoZ+zkNuXdd8dm6o51ZKn1ytjc=@vger.kernel.org X-Gm-Message-State: AOJu0YxBdpB6RHRJ5zAxm18bp6bCQ6H7CE0wKZxOqCMqX8PRaHzqs1Ux XfoOs3dxlA0M44c5JF3fx1QTKHmVJOsEJZ2nyaP5bboEEZjolcXNkIt4cv6TW95CXNhriijYtJH L5f0yk4hgqQ== X-Google-Smtp-Source: AGHT+IGBB/9CxgsoUv0P1HhdY5gqY248ujpEmyp6WGrPPHvd4bT5y/9JA+erEo1R9vmuvSbJZrYYKgFYk3q6 X-Received: from pjtd1.prod.google.com ([2002:a17:90b:41:b0:31c:2fe4:33b6]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:a11a:b0:240:1e63:2dfd with SMTP id adf61e73a8af0-2430d42ccb1mr1040643637.29.1755567624752; Mon, 18 Aug 2025 18:40:24 -0700 (PDT) Date: Mon, 18 Aug 2025 18:39:34 -0700 In-Reply-To: <20250819013941.209033-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250819013941.209033-1-irogers@google.com> X-Mailer: git-send-email 2.51.0.rc1.167.g924127e9c0-goog Message-ID: <20250819013941.209033-5-irogers@google.com> Subject: [PATCH v10 04/11] perf python: Add function returning dictionary of all events on a PMU 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" Allow all events on a PMU to be gathered, similar to how perf list gathers event information. An example usage: ``` $ python Python 3.12.9 (main, Feb 5 2025, 01:31:18) [GCC 14.2.0] on linux >>> import perf >>> for pmu in perf.pmus(): ... print(pmu.events()) ... [{'name': 'mem_load_retired.l3_hit', 'desc': 'Retired load instructions... ``` Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Reviewed-by: Howard Chu --- tools/perf/util/python.c | 71 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index 6f9728d365ae..cf1128435022 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -670,6 +670,71 @@ static PyObject *pyrf_pmu__name(PyObject *self) return PyUnicode_FromString(ppmu->pmu->name); } =20 +static bool add_to_dict(PyObject *dict, const char *key, const char *value) +{ + PyObject *pkey, *pvalue; + bool ret; + + if (value =3D=3D NULL) + return true; + + pkey =3D PyUnicode_FromString(key); + pvalue =3D PyUnicode_FromString(value); + + ret =3D pkey && pvalue && PyDict_SetItem(dict, pkey, pvalue) =3D=3D 0; + Py_XDECREF(pkey); + Py_XDECREF(pvalue); + return ret; +} + +static int pyrf_pmu__events_cb(void *state, struct pmu_event_info *info) +{ + PyObject *py_list =3D state; + PyObject *dict =3D PyDict_New(); + + if (!dict) + return -ENOMEM; + + if (!add_to_dict(dict, "name", info->name) || + !add_to_dict(dict, "alias", info->alias) || + !add_to_dict(dict, "scale_unit", info->scale_unit) || + !add_to_dict(dict, "desc", info->desc) || + !add_to_dict(dict, "long_desc", info->long_desc) || + !add_to_dict(dict, "encoding_desc", info->encoding_desc) || + !add_to_dict(dict, "topic", info->topic) || + !add_to_dict(dict, "event_type_desc", info->event_type_desc) || + !add_to_dict(dict, "str", info->str) || + !add_to_dict(dict, "deprecated", info->deprecated ? "deprecated" : NU= LL) || + PyList_Append(py_list, dict) !=3D 0) { + Py_DECREF(dict); + return -ENOMEM; + } + Py_DECREF(dict); + return 0; +} + +static PyObject *pyrf_pmu__events(PyObject *self) +{ + struct pyrf_pmu *ppmu =3D (void *)self; + PyObject *py_list =3D PyList_New(0); + int ret; + + if (!py_list) + return NULL; + + ret =3D perf_pmu__for_each_event(ppmu->pmu, + /*skip_duplicate_pmus=3D*/false, + py_list, + pyrf_pmu__events_cb); + if (ret) { + Py_DECREF(py_list); + errno =3D -ret; + PyErr_SetFromErrno(PyExc_OSError); + return NULL; + } + return py_list; +} + static PyObject *pyrf_pmu__repr(PyObject *self) { struct pyrf_pmu *ppmu =3D (void *)self; @@ -680,6 +745,12 @@ static PyObject *pyrf_pmu__repr(PyObject *self) static const char pyrf_pmu__doc[] =3D PyDoc_STR("perf Performance Monitori= ng Unit (PMU) object."); =20 static PyMethodDef pyrf_pmu__methods[] =3D { + { + .ml_name =3D "events", + .ml_meth =3D (PyCFunction)pyrf_pmu__events, + .ml_flags =3D METH_NOARGS, + .ml_doc =3D PyDoc_STR("Returns a sequence of events encoded as a dicti= onaries.") + }, { .ml_name =3D "name", .ml_meth =3D (PyCFunction)pyrf_pmu__name, --=20 2.51.0.rc1.167.g924127e9c0-goog