perf script: Add general python handler to process non-tracepoint events
This patch just follows Robert Richter's idea and the commit37a058ea0
"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> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <robert.richter@amd.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1344419875-21665-2-git-send-email-feng.tang@intel.com [ committer note: Fixed up wrtda37896
, i.e. pevent parm in script event handlers ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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2055fdaf87
Коммит
6a6daec2ae
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@ -32,6 +32,7 @@
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#include "../event.h"
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#include "../thread.h"
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#include "../trace-event.h"
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#include "../evsel.h"
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PyMODINIT_FUNC initperf_trace_context(void);
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@ -220,7 +221,7 @@ static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
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return event;
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}
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static void python_process_event(union perf_event *perf_event __unused,
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static void python_process_tracepoint(union perf_event *perf_event __unused,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct machine *machine __unused,
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@ -337,6 +338,62 @@ static void python_process_event(union perf_event *perf_event __unused,
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Py_DECREF(t);
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}
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static void python_process_general_event(union perf_event *perf_event __unused,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct machine *machine __unused,
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struct thread *thread __unused)
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{
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PyObject *handler, *retval, *t;
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static char handler_name[64];
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unsigned n = 0;
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void *data = sample->raw_data;
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t = PyTuple_New(MAX_FIELDS);
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if (!t)
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Py_FatalError("couldn't create Python tuple");
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snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
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handler = PyDict_GetItemString(main_dict, handler_name);
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if (handler && !PyCallable_Check(handler)) {
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handler = NULL;
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goto exit;
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}
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/* Pass 3 parameters: event_attr, perf_sample, raw data */
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PyTuple_SetItem(t, n++, PyString_FromStringAndSize((void *)&evsel->attr, sizeof(evsel->attr)));
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PyTuple_SetItem(t, n++, PyString_FromStringAndSize((void *)sample, sizeof(*sample)));
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PyTuple_SetItem(t, n++, PyString_FromStringAndSize(data, sample->raw_size));
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if (_PyTuple_Resize(&t, n) == -1)
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Py_FatalError("error resizing Python tuple");
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retval = PyObject_CallObject(handler, t);
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if (retval == NULL)
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handler_call_die(handler_name);
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exit:
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Py_DECREF(t);
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}
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static void python_process_event(union perf_event *perf_event,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct machine *machine,
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struct thread *thread)
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{
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switch (evsel->attr.type) {
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case PERF_TYPE_TRACEPOINT:
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python_process_tracepoint(perf_event, sample, evsel,
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machine, thread);
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break;
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/* Reserve for future process_hw/sw/raw APIs */
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default:
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python_process_general_event(perf_event, sample, evsel,
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machine, thread);
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}
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}
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static int run_start_sub(void)
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{
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PyObject *handler, *retval;
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