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perf scripting python: Add context switch

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Add context_switch to general python scripting.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210525095112.1399-9-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2021-05-25 12:51:10 +03:00 committed by Arnaldo Carvalho de Melo
parent 22cc2f74bb
commit 0db2134069
1 changed files with 45 additions and 0 deletions
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45
tools/perf/util/scripting-engines/trace-event-python.c
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@ -1019,6 +1019,11 @@ static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
}
static int tuple_set_bool(PyObject *t, unsigned int pos, bool val)
{
return PyTuple_SetItem(t, pos, PyBool_FromLong(val));
}
static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
{
return PyTuple_SetItem(t, pos, _PyUnicode_FromString(s));
@ -1406,6 +1411,44 @@ static void python_process_event(union perf_event *event,
}
}
static void python_do_process_switch(union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
const char *handler_name = "context_switch";
bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
bool out_preempt = out && (event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT);
pid_t np_pid = -1, np_tid = -1;
PyObject *handler, *t;
handler = get_handler(handler_name);
if (!handler)
return;
if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
np_pid = event->context_switch.next_prev_pid;
np_tid = event->context_switch.next_prev_tid;
}
t = tuple_new(9);
if (!t)
return;
tuple_set_u64(t, 0, sample->time);
tuple_set_s32(t, 1, sample->cpu);
tuple_set_s32(t, 2, sample->pid);
tuple_set_s32(t, 3, sample->tid);
tuple_set_s32(t, 4, np_pid);
tuple_set_s32(t, 5, np_tid);
tuple_set_s32(t, 6, machine->pid);
tuple_set_bool(t, 7, out);
tuple_set_bool(t, 8, out_preempt);
call_object(handler, t, handler_name);
Py_DECREF(t);
}
static void python_process_switch(union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
@ -1414,6 +1457,8 @@ static void python_process_switch(union perf_event *event,
if (tables->db_export_mode)
db_export__switch(&tables->dbe, event, sample, machine);
else
python_do_process_switch(event, sample, machine);
}
static void get_handler_name(char *str, size_t size,