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Subject[RFC 2/4] perf script python: Refactor creation of perf sample dict
Date
Move the creation of the dict containing perf_sample entries into a
helper function to enable its reuse in other sample processing routines.

Signed-off-by: Arun Kalyanasundaram <arunkaly@google.com>
---
.../util/scripting-engines/trace-event-python.c | 94 ++++++++++++----------
1 file changed, 53 insertions(+), 41 deletions(-)

diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 8a8f4829d3e2..69d1b6db96f6 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -391,6 +391,57 @@ static PyObject *python_process_callchain(struct perf_sample *sample,
return pylist;
}

+static PyObject *get_perf_sample_dict(struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct addr_location *al,
+ PyObject *callchain)
+{
+ PyObject *dict, *dict_sample;
+
+ dict = PyDict_New();
+ if (!dict)
+ Py_FatalError("couldn't create Python dictionary");
+
+ dict_sample = PyDict_New();
+ if (!dict_sample)
+ Py_FatalError("couldn't create Python dictionary");
+
+ pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
+ pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
+ (const char *)&evsel->attr, sizeof(evsel->attr)));
+
+ pydict_set_item_string_decref(dict_sample, "pid",
+ PyInt_FromLong(sample->pid));
+ pydict_set_item_string_decref(dict_sample, "tid",
+ PyInt_FromLong(sample->tid));
+ pydict_set_item_string_decref(dict_sample, "cpu",
+ PyInt_FromLong(sample->cpu));
+ pydict_set_item_string_decref(dict_sample, "ip",
+ PyLong_FromUnsignedLongLong(sample->ip));
+ pydict_set_item_string_decref(dict_sample, "time",
+ PyLong_FromUnsignedLongLong(sample->time));
+ pydict_set_item_string_decref(dict_sample, "period",
+ PyLong_FromUnsignedLongLong(sample->period));
+ pydict_set_item_string_decref(dict, "sample", dict_sample);
+
+ pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
+ (const char *)sample->raw_data, sample->raw_size));
+ pydict_set_item_string_decref(dict, "comm",
+ PyString_FromString(thread__comm_str(al->thread)));
+ if (al->map) {
+ pydict_set_item_string_decref(dict, "dso",
+ PyString_FromString(al->map->dso->name));
+ }
+ if (al->sym) {
+ pydict_set_item_string_decref(dict, "symbol",
+ PyString_FromString(al->sym->name));
+ }
+
+ pydict_set_item_string_decref(dict, "callchain", callchain);
+
+ return dict;
+}
+
static void python_process_tracepoint(struct perf_sample *sample,
struct perf_evsel *evsel,
struct addr_location *al)
@@ -801,7 +852,7 @@ static void python_process_general_event(struct perf_sample *sample,
struct perf_evsel *evsel,
struct addr_location *al)
{
- PyObject *handler, *t, *dict, *callchain, *dict_sample;
+ PyObject *handler, *t, *dict, *callchain;
static char handler_name[64];
unsigned n = 0;

@@ -819,48 +870,9 @@ static void python_process_general_event(struct perf_sample *sample,
if (!t)
Py_FatalError("couldn't create Python tuple");

- dict = PyDict_New();
- if (!dict)
- Py_FatalError("couldn't create Python dictionary");
-
- dict_sample = PyDict_New();
- if (!dict_sample)
- Py_FatalError("couldn't create Python dictionary");
-
- pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
- pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
- (const char *)&evsel->attr, sizeof(evsel->attr)));
-
- pydict_set_item_string_decref(dict_sample, "pid",
- PyInt_FromLong(sample->pid));
- pydict_set_item_string_decref(dict_sample, "tid",
- PyInt_FromLong(sample->tid));
- pydict_set_item_string_decref(dict_sample, "cpu",
- PyInt_FromLong(sample->cpu));
- pydict_set_item_string_decref(dict_sample, "ip",
- PyLong_FromUnsignedLongLong(sample->ip));
- pydict_set_item_string_decref(dict_sample, "time",
- PyLong_FromUnsignedLongLong(sample->time));
- pydict_set_item_string_decref(dict_sample, "period",
- PyLong_FromUnsignedLongLong(sample->period));
- pydict_set_item_string_decref(dict, "sample", dict_sample);
-
- pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
- (const char *)sample->raw_data, sample->raw_size));
- pydict_set_item_string_decref(dict, "comm",
- PyString_FromString(thread__comm_str(al->thread)));
- if (al->map) {
- pydict_set_item_string_decref(dict, "dso",
- PyString_FromString(al->map->dso->name));
- }
- if (al->sym) {
- pydict_set_item_string_decref(dict, "symbol",
- PyString_FromString(al->sym->name));
- }
-
/* ip unwinding */
callchain = python_process_callchain(sample, evsel, al);
- pydict_set_item_string_decref(dict, "callchain", callchain);
+ dict = get_perf_sample_dict(sample, evsel, al, callchain);

PyTuple_SetItem(t, n++, dict);
if (_PyTuple_Resize(&t, n) == -1)
--
2.13.2.932.g7449e964c-goog
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