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perf python: Add parse_metrics function 

Add parse_metrics function that takes a string of metrics and/or
metric groups and returns the evlist containing the events and
metrics.

For example:
```
>>> import perf
>>> perf.parse_metrics("TopdownL1")
evlist([cpu/TOPDOWN.SLOTS/,cpu/topdown-retiring/,cpu/topdown-fe-bound/,
cpu/topdown-be-bound/,cpu/topdown-bad-spec/,cpu/INT_MISC.CLEARS_COUNT/,
cpu/INT_MISC.UOP_DROPPING/])
```

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/20250819013941.209033-7-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2025-08-18 18:39:36 -07:00 committed by Arnaldo Carvalho de Melo
parent 83e5b8f9bf
commit d0550be70f
1 changed files with 41 additions and 0 deletions
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41
tools/perf/util/python.c
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@ -1891,6 +1891,40 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
return result;
}
static PyObject *pyrf__parse_metrics(PyObject *self, PyObject *args)
{
const char *input;
struct evlist evlist = {};
PyObject *result;
PyObject *pcpus = NULL, *pthreads = NULL;
struct perf_cpu_map *cpus;
struct perf_thread_map *threads;
int ret;
if (!PyArg_ParseTuple(args, "s|OO", &input, &pcpus, &pthreads))
return NULL;
threads = pthreads ? ((struct pyrf_thread_map *)pthreads)->threads : NULL;
cpus = pcpus ? ((struct pyrf_cpu_map *)pcpus)->cpus : NULL;
evlist__init(&evlist, cpus, threads);
ret = metricgroup__parse_groups(&evlist, /*pmu=*/"all", input,
/*metric_no_group=*/ false,
/*metric_no_merge=*/ false,
/*metric_no_threshold=*/ true,
/*user_requested_cpu_list=*/ NULL,
/*system_wide=*/true,
/*hardware_aware_grouping=*/ false);
if (ret) {
errno = -ret;
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
result = pyrf_evlist__from_evlist(&evlist);
evlist__exit(&evlist);
return result;
}
static PyMethodDef perf__methods[] = {
{
.ml_name = "tracepoint",
@ -1904,6 +1938,13 @@ static PyMethodDef perf__methods[] = {
.ml_flags = METH_VARARGS,
.ml_doc = PyDoc_STR("Parse a string of events and return an evlist.")
},
{
.ml_name = "parse_metrics",
.ml_meth = (PyCFunction) pyrf__parse_metrics,
.ml_flags = METH_VARARGS,
.ml_doc = PyDoc_STR(
"Parse a string of metics or metric groups and return an evlist.")
},
{
.ml_name = "pmus",
.ml_meth = (PyCFunction) pyrf__pmus,