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perf python: Add evlist metrics function

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The function returns a list of the names of metrics within the
evlist. For example:
```
>>> import perf
>>> perf.parse_metrics("TopdownL1").metrics()
['tma_bad_speculation', 'tma_frontend_bound', 'tma_backend_bound', 'tma_retiring']
```

Reviewed-by: Howard Chu <howardchu95@gmail.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Chun-Tse Shao <ctshao@google.com>
Cc: Collin Funk <collin.funk1@gmail.com>
Cc: Dr. David Alan Gilbert <linux@treblig.org>
Cc: Gautam Menghani <gautam@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20250819013941.209033-8-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2025-08-18 18:39:37 -07:00 committed by Arnaldo Carvalho de Melo
parent d0550be70f
commit 5ffa0246db
1 changed files with 33 additions and 0 deletions
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33
tools/perf/util/python.c
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@ -1303,6 +1303,33 @@ static PyObject *pyrf_evlist__all_cpus(struct pyrf_evlist *pevlist)
return (PyObject *)pcpu_map;
}
static PyObject *pyrf_evlist__metrics(struct pyrf_evlist *pevlist)
{
PyObject *list = PyList_New(/*len=*/0);
struct rb_node *node;
if (!list)
return NULL;
for (node = rb_first_cached(&pevlist->evlist.metric_events.entries); node;
node = rb_next(node)) {
struct metric_event *me = container_of(node, struct metric_event, nd);
struct list_head *pos;
list_for_each(pos, &me->head) {
struct metric_expr *expr = container_of(pos, struct metric_expr, nd);
PyObject *str = PyUnicode_FromString(expr->metric_name);
if (!str || PyList_Append(list, str) != 0) {
Py_DECREF(list);
return NULL;
}
Py_DECREF(str);
}
}
return list;
}
static PyObject *pyrf_evlist__mmap(struct pyrf_evlist *pevlist,
PyObject *args, PyObject *kwargs)
{
@ -1531,6 +1558,12 @@ static PyMethodDef pyrf_evlist__methods[] = {
.ml_flags = METH_NOARGS,
.ml_doc = PyDoc_STR("CPU map union of all evsel CPU maps.")
},
{
.ml_name = "metrics",
.ml_meth = (PyCFunction)pyrf_evlist__metrics,
.ml_flags = METH_NOARGS,
.ml_doc = PyDoc_STR("List of metric names within the evlist.")
},
{
.ml_name = "mmap",
.ml_meth = (PyCFunction)pyrf_evlist__mmap,