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Message-Id: <20241031014252.753588-19-irogers@google.com>
Date: Wed, 30 Oct 2024 18:42:49 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, James Clark <james.clark@...aro.org>,
Howard Chu <howardchu95@...il.com>, Athira Jajeev <atrajeev@...ux.vnet.ibm.com>,
Michael Petlan <mpetlan@...hat.com>, Veronika Molnarova <vmolnaro@...hat.com>,
Dapeng Mi <dapeng1.mi@...ux.intel.com>, Thomas Richter <tmricht@...ux.ibm.com>,
Ilya Leoshkevich <iii@...ux.ibm.com>, Colin Ian King <colin.i.king@...il.com>,
Weilin Wang <weilin.wang@...el.com>, Andi Kleen <ak@...ux.intel.com>,
Josh Poimboeuf <jpoimboe@...hat.com>, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org
Subject: [PATCH v5 18/21] perf python: Add parse_events function
Add basic parse_events function that takes a string and returns an
evlist. As the python evlist is embedded in a pyrf_evlist, and the
evsels are embedded in pyrf_evsels, copy the parsed data into those
structs and update evsel__clone to enable this.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/util/cgroup.c | 2 +-
tools/perf/util/evsel.c | 19 ++++++++-----
tools/perf/util/evsel.h | 2 +-
tools/perf/util/python.c | 61 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 75 insertions(+), 9 deletions(-)
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 0f759dd96db7..fbcc0626f9ce 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -473,7 +473,7 @@ int evlist__expand_cgroup(struct evlist *evlist, const char *str,
leader = NULL;
evlist__for_each_entry(orig_list, pos) {
- evsel = evsel__clone(pos);
+ evsel = evsel__clone(/*dest=*/NULL, pos);
if (evsel == NULL)
goto out_err;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index f780e30aa259..4213ffacdc3c 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -453,7 +453,7 @@ static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
* The assumption is that @orig is not configured nor opened yet.
* So we only care about the attributes that can be set while it's parsed.
*/
-struct evsel *evsel__clone(struct evsel *orig)
+struct evsel *evsel__clone(struct evsel *dest, struct evsel *orig)
{
struct evsel *evsel;
@@ -466,7 +466,11 @@ struct evsel *evsel__clone(struct evsel *orig)
if (orig->bpf_obj)
return NULL;
- evsel = evsel__new(&orig->core.attr);
+ if (dest)
+ evsel = dest;
+ else
+ evsel = evsel__new(&orig->core.attr);
+
if (evsel == NULL)
return NULL;
@@ -511,11 +515,12 @@ struct evsel *evsel__clone(struct evsel *orig)
evsel->core.leader = orig->core.leader;
evsel->max_events = orig->max_events;
- free((char *)evsel->unit);
- evsel->unit = strdup(orig->unit);
- if (evsel->unit == NULL)
- goto out_err;
-
+ zfree(&evsel->unit);
+ if (orig->unit) {
+ evsel->unit = strdup(orig->unit);
+ if (evsel->unit == NULL)
+ goto out_err;
+ }
evsel->scale = orig->scale;
evsel->snapshot = orig->snapshot;
evsel->per_pkg = orig->per_pkg;
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 04934a7af174..7f41d6f8cf6f 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -241,7 +241,7 @@ static inline struct evsel *evsel__new(struct perf_event_attr *attr)
return evsel__new_idx(attr, 0);
}
-struct evsel *evsel__clone(struct evsel *orig);
+struct evsel *evsel__clone(struct evsel *dest, struct evsel *orig);
int copy_config_terms(struct list_head *dst, struct list_head *src);
void free_config_terms(struct list_head *config_terms);
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 6e2ff0076daa..1a53a97c513d 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -13,6 +13,7 @@
#include "evsel.h"
#include "event.h"
#include "print_binary.h"
+#include "strbuf.h"
#include "thread_map.h"
#include "trace-event.h"
#include "mmap.h"
@@ -1201,6 +1202,60 @@ static PyObject *pyrf__tracepoint(struct pyrf_evsel *pevsel,
#endif // HAVE_LIBTRACEEVENT
}
+static PyObject *pyrf_evsel__from_evsel(struct evsel *evsel)
+{
+ struct pyrf_evsel *pevsel = PyObject_New(struct pyrf_evsel, &pyrf_evsel__type);
+
+ if (!pevsel)
+ return NULL;
+
+ memset(&pevsel->evsel, 0, sizeof(pevsel->evsel));
+ evsel__init(&pevsel->evsel, &evsel->core.attr, evsel->core.idx);
+
+ evsel__clone(&pevsel->evsel, evsel);
+ return (PyObject *)pevsel;
+}
+
+static PyObject *pyrf_evlist__from_evlist(struct evlist *evlist)
+{
+ struct pyrf_evlist *pevlist = PyObject_New(struct pyrf_evlist, &pyrf_evlist__type);
+ struct evsel *pos;
+
+ if (!pevlist)
+ return NULL;
+
+ memset(&pevlist->evlist, 0, sizeof(pevlist->evlist));
+ evlist__init(&pevlist->evlist, evlist->core.all_cpus, evlist->core.threads);
+ evlist__for_each_entry(evlist, pos) {
+ struct pyrf_evsel *pevsel = (void *)pyrf_evsel__from_evsel(pos);
+
+ evlist__add(&pevlist->evlist, &pevsel->evsel);
+ }
+ return (PyObject *)pevlist;
+}
+
+static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
+{
+ const char *input;
+ struct evlist evlist = {};
+ struct parse_events_error err;
+ PyObject *result;
+
+ if (!PyArg_ParseTuple(args, "s", &input))
+ return NULL;
+
+ parse_events_error__init(&err);
+ evlist__init(&evlist, NULL, NULL);
+ if (parse_events(&evlist, input, &err)) {
+ parse_events_error__print(&err, input);
+ PyErr_SetFromErrno(PyExc_OSError);
+ return NULL;
+ }
+ result = pyrf_evlist__from_evlist(&evlist);
+ evlist__exit(&evlist);
+ return result;
+}
+
static PyMethodDef perf__methods[] = {
{
.ml_name = "tracepoint",
@@ -1208,6 +1263,12 @@ static PyMethodDef perf__methods[] = {
.ml_flags = METH_VARARGS | METH_KEYWORDS,
.ml_doc = PyDoc_STR("Get tracepoint config.")
},
+ {
+ .ml_name = "parse_events",
+ .ml_meth = (PyCFunction) pyrf__parse_events,
+ .ml_flags = METH_VARARGS,
+ .ml_doc = PyDoc_STR("Parse a string of events and return an evlist.")
+ },
{ .ml_name = NULL, }
};
--
2.47.0.163.g1226f6d8fa-goog
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