Commit-ID: 6a6daec2ae9f097703c1da4925367f1c198c9492
Gitweb: http://git.kernel.org/tip/6a6daec2ae9f097703c1da4925367f1c198c9492
Author: Feng Tang <feng.t...@intel.com>
AuthorDate: Wed, 8 Aug 2012 17:57:51 +0800
Committer: Arnaldo Carvalho de Melo <a...@redhat.com>
CommitDate: Wed, 8 Aug 2012 12:45:33 -0300
perf script: Add general python handler to process non-tracepoint events
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.t...@intel.com>
Cc: Andi Kleen <a...@firstfloor.org>
Cc: David Ahern <dsah...@gmail.com>
Cc: Ingo Molnar <mi...@elte.hu>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Robert Richter <robert.rich...@amd.com>
Cc: Stephane Eranian <eran...@google.com>
Link:
http://lkml.kernel.org/r/1344419875-21665-2-git-send-email-feng.t...@intel.com
[ committer note: Fixed up wrt da37896, i.e. pevent parm in script event
handlers ]
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
.../util/scripting-engines/trace-event-python.c | 59 +++++++++++++++++++-
1 files changed, 58 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 df7d33d..b9010d8 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -32,6 +32,7 @@
#include "../event.h"
#include "../thread.h"
#include "../trace-event.h"
+#include "../evsel.h"
PyMODINIT_FUNC initperf_trace_context(void);
@@ -220,7 +221,7 @@ static inline struct event_format *find_cache_event(struct
perf_evsel *evsel)
return event;
}
-static void python_process_event(union perf_event *perf_event __unused,
+static void python_process_tracepoint(union perf_event *perf_event __unused,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine __unused,
@@ -337,6 +338,62 @@ static void python_process_event(union perf_event
*perf_event __unused,
Py_DECREF(t);
}
+static void python_process_general_event(union perf_event *perf_event __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((void
*)&evsel->attr, sizeof(evsel->attr)));
+ PyTuple_SetItem(t, n++, PyString_FromStringAndSize((void *)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 *perf_event,
+ 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(perf_event, sample, evsel,
+ machine, thread);
+ break;
+ /* Reserve for future process_hw/sw/raw APIs */
+ default:
+ python_process_general_event(perf_event, sample, evsel,
+ machine, thread);
+ }
+}
+
static int run_start_sub(void)
{
PyObject *handler, *retval;
--
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