Messages in this thread Patch in this message | | | From | Feng Tang <> | Subject | [PATCH v3 1/3] perf script: Add general python handler to process non-tracepoint events | Date | Mon, 18 Jun 2012 14:10:37 +0800 |
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This patch just follows Robert Richter's idea and the commit 37a058ea0 "perf script: Add generic perl handler to process events" to similarly add a python handler for general events other than tracepoints.
For non-tracepoint events, this patch will try to find a function named "process_event" in the python script, and pass the event attribute, perf_sample, raw_data in format of raw string. And the python script can use "struct" module's unpack function to disasemble the needed info and process.
Signed-off-by: Feng Tang <feng.tang@intel.com> --- .../util/scripting-engines/trace-event-python.c | 60 +++++++++++++++++++- 1 files changed, 59 insertions(+), 1 deletions(-)
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c index acb9795..ab441a4 100644 --- a/tools/perf/util/scripting-engines/trace-event-python.c +++ b/tools/perf/util/scripting-engines/trace-event-python.c @@ -31,6 +31,7 @@ #include "../event.h" #include "../thread.h" #include "../trace-event.h" +#include "../evsel.h" PyMODINIT_FUNC initperf_trace_context(void); @@ -209,7 +210,7 @@ static inline struct event_format *find_cache_event(int type) return event; } -static void python_process_event(union perf_event *pevent __unused, +static void python_process_tracepoint(union perf_event *pevent __unused, struct perf_sample *sample, struct perf_evsel *evsel __unused, struct machine *machine __unused, @@ -328,6 +329,63 @@ static void python_process_event(union perf_event *pevent __unused, Py_DECREF(t); } +static void python_process_general_event(union perf_event *pevent __unused, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine __unused, + struct thread *thread __unused) +{ + PyObject *handler, *retval, *t; + static char handler_name[64]; + unsigned n = 0; + void *data = sample->raw_data; + + t = PyTuple_New(MAX_FIELDS); + if (!t) + Py_FatalError("couldn't create Python tuple"); + + snprintf(handler_name, sizeof(handler_name), "%s", "process_event"); + + handler = PyDict_GetItemString(main_dict, handler_name); + if (handler && !PyCallable_Check(handler)) { + handler = NULL; + goto exit; + } + + /* Pass 3 parameters: event_attr, perf_sample, raw data */ + PyTuple_SetItem(t, n++, PyString_FromStringAndSize( + (const char *)&evsel->attr, sizeof(evsel->attr))); + PyTuple_SetItem(t, n++, PyString_FromStringAndSize( + (const char *)sample, sizeof(*sample))); + PyTuple_SetItem(t, n++, PyString_FromStringAndSize( + data, sample->raw_size)); + + if (_PyTuple_Resize(&t, n) == -1) + Py_FatalError("error resizing Python tuple"); + + retval = PyObject_CallObject(handler, t); + if (retval == NULL) + handler_call_die(handler_name); +exit: + Py_DECREF(t); +} + +static void python_process_event(union perf_event *pevent, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine, + struct thread *thread) +{ + switch (evsel->attr.type) { + case PERF_TYPE_TRACEPOINT: + python_process_tracepoint(pevent, sample, evsel, machine, thread); + break; + /* Reserve for future process_hw/sw/raw APIs */ + default: + python_process_general_event(pevent, sample, evsel, machine, thread); + } +} + static int run_start_sub(void) { PyObject *handler, *retval; -- 1.7.1
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