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[PATCH v2 06/11] perf python: Add optional cpus and threads arguments to parse_events

Ian Rogers posted 11 patches 9 months, 3 weeks ago
[PATCH v2 06/11] perf python: Add optional cpus and threads arguments to parse_events
Posted by Ian Rogers 9 months, 3 weeks ago 
Used for the evlist initialization.

Reviewed-by: Howard Chu <howardchu95@gmail.com>
Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/python.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index b600b6379b4e..4a3015e7dc83 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1339,12 +1339,18 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
 	struct evlist evlist = {};
 	struct parse_events_error err;
 	PyObject *result;
+	PyObject *pcpus = NULL, *pthreads = NULL;
+	struct perf_cpu_map *cpus;
+	struct perf_thread_map *threads;
 
-	if (!PyArg_ParseTuple(args, "s", &input))
+	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;
+
 	parse_events_error__init(&err);
-	evlist__init(&evlist, NULL, NULL);
+	evlist__init(&evlist, cpus, threads);
 	if (parse_events(&evlist, input, &err)) {
 		parse_events_error__print(&err, input);
 		PyErr_SetFromErrno(PyExc_OSError);
-- 
2.48.1.711.g2feabab25a-goog
Re: [PATCH v2 06/11] perf python: Add optional cpus and threads arguments to parse_events
Posted by Namhyung Kim 9 months, 1 week ago 
On Fri, Feb 28, 2025 at 02:23:03PM -0800, Ian Rogers wrote:
> Used for the evlist initialization.
> 
> Reviewed-by: Howard Chu <howardchu95@gmail.com>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
>  tools/perf/util/python.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
> index b600b6379b4e..4a3015e7dc83 100644
> --- a/tools/perf/util/python.c
> +++ b/tools/perf/util/python.c
> @@ -1339,12 +1339,18 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
>  	struct evlist evlist = {};
>  	struct parse_events_error err;
>  	PyObject *result;
> +	PyObject *pcpus = NULL, *pthreads = NULL;
> +	struct perf_cpu_map *cpus;
> +	struct perf_thread_map *threads;
>  
> -	if (!PyArg_ParseTuple(args, "s", &input))
> +	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;

I wonder if it needs any type checks before accessing them.

Thanks,
Namhyung

> +
>  	parse_events_error__init(&err);
> -	evlist__init(&evlist, NULL, NULL);
> +	evlist__init(&evlist, cpus, threads);
>  	if (parse_events(&evlist, input, &err)) {
>  		parse_events_error__print(&err, input);
>  		PyErr_SetFromErrno(PyExc_OSError);
> -- 
> 2.48.1.711.g2feabab25a-goog
>
Re: [PATCH v2 06/11] perf python: Add optional cpus and threads arguments to parse_events
Posted by Ian Rogers 9 months, 1 week ago 
On Mon, Mar 10, 2025 at 3:12 PM Namhyung Kim <namhyung@kernel.org> wrote:
>
> On Fri, Feb 28, 2025 at 02:23:03PM -0800, Ian Rogers wrote:
> > Used for the evlist initialization.
> >
> > Reviewed-by: Howard Chu <howardchu95@gmail.com>
> > Signed-off-by: Ian Rogers <irogers@google.com>
> > ---
> >  tools/perf/util/python.c | 10 ++++++++--
> >  1 file changed, 8 insertions(+), 2 deletions(-)
> >
> > diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
> > index b600b6379b4e..4a3015e7dc83 100644
> > --- a/tools/perf/util/python.c
> > +++ b/tools/perf/util/python.c
> > @@ -1339,12 +1339,18 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
> >       struct evlist evlist = {};
> >       struct parse_events_error err;
> >       PyObject *result;
> > +     PyObject *pcpus = NULL, *pthreads = NULL;
> > +     struct perf_cpu_map *cpus;
> > +     struct perf_thread_map *threads;
> >
> > -     if (!PyArg_ParseTuple(args, "s", &input))
> > +     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;
>
> I wonder if it needs any type checks before accessing them.

Agreed. We don't do it yet elsewhere:
https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/tree/tools/perf/util/python.c?h=perf-tools-next#n769
although there keywords potentially avoid ambiguity. Given this I
think improving the typing is follow up work.

Thanks,
Ian

> Thanks,
> Namhyung
>
> > +
> >       parse_events_error__init(&err);
> > -     evlist__init(&evlist, NULL, NULL);
> > +     evlist__init(&evlist, cpus, threads);
> >       if (parse_events(&evlist, input, &err)) {
> >               parse_events_error__print(&err, input);
> >               PyErr_SetFromErrno(PyExc_OSError);
> > --
> > 2.48.1.711.g2feabab25a-goog
> >
Re: [PATCH v2 06/11] perf python: Add optional cpus and threads arguments to parse_events
Posted by Namhyung Kim 9 months, 1 week ago 
Hi Ian,

On Mon, Mar 10, 2025 at 05:28:48PM -0700, Ian Rogers wrote:
> On Mon, Mar 10, 2025 at 3:12 PM Namhyung Kim <namhyung@kernel.org> wrote:
> >
> > On Fri, Feb 28, 2025 at 02:23:03PM -0800, Ian Rogers wrote:
> > > Used for the evlist initialization.
> > >
> > > Reviewed-by: Howard Chu <howardchu95@gmail.com>
> > > Signed-off-by: Ian Rogers <irogers@google.com>
> > > ---
> > >  tools/perf/util/python.c | 10 ++++++++--
> > >  1 file changed, 8 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
> > > index b600b6379b4e..4a3015e7dc83 100644
> > > --- a/tools/perf/util/python.c
> > > +++ b/tools/perf/util/python.c
> > > @@ -1339,12 +1339,18 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
> > >       struct evlist evlist = {};
> > >       struct parse_events_error err;
> > >       PyObject *result;
> > > +     PyObject *pcpus = NULL, *pthreads = NULL;
> > > +     struct perf_cpu_map *cpus;
> > > +     struct perf_thread_map *threads;
> > >
> > > -     if (!PyArg_ParseTuple(args, "s", &input))
> > > +     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;
> >
> > I wonder if it needs any type checks before accessing them.
> 
> Agreed. We don't do it yet elsewhere:
> https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/tree/tools/perf/util/python.c?h=perf-tools-next#n769
> although there keywords potentially avoid ambiguity. Given this I
> think improving the typing is follow up work.

Sounds good.

Thanks,
Namhyung

> >
> > > +
> > >       parse_events_error__init(&err);
> > > -     evlist__init(&evlist, NULL, NULL);
> > > +     evlist__init(&evlist, cpus, threads);
> > >       if (parse_events(&evlist, input, &err)) {
> > >               parse_events_error__print(&err, input);
> > >               PyErr_SetFromErrno(PyExc_OSError);
> > > --
> > > 2.48.1.711.g2feabab25a-goog
> > >
Re: [PATCH v2 06/11] perf python: Add optional cpus and threads arguments to parse_events
Posted by Arnaldo Carvalho de Melo 9 months, 1 week ago 
On Fri, Feb 28, 2025 at 02:23:03PM -0800, Ian Rogers wrote:
> Used for the evlist initialization.

Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com>

- Arnaldo
 
> Reviewed-by: Howard Chu <howardchu95@gmail.com>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
>  tools/perf/util/python.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
> index b600b6379b4e..4a3015e7dc83 100644
> --- a/tools/perf/util/python.c
> +++ b/tools/perf/util/python.c
> @@ -1339,12 +1339,18 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
>  	struct evlist evlist = {};
>  	struct parse_events_error err;
>  	PyObject *result;
> +	PyObject *pcpus = NULL, *pthreads = NULL;
> +	struct perf_cpu_map *cpus;
> +	struct perf_thread_map *threads;
>  
> -	if (!PyArg_ParseTuple(args, "s", &input))
> +	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;
> +
>  	parse_events_error__init(&err);
> -	evlist__init(&evlist, NULL, NULL);
> +	evlist__init(&evlist, cpus, threads);
>  	if (parse_events(&evlist, input, &err)) {
>  		parse_events_error__print(&err, input);
>  		PyErr_SetFromErrno(PyExc_OSError);
> -- 
> 2.48.1.711.g2feabab25a-goog

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