def _validate_pid(self, pid): """Validate the passed pid argument""" if not pid: pids = sched_funcs.get_pids_for_process(self._ftrace, self.execname) if len(pids) != 1: raise RuntimeError( "There should be exactly one PID {0} for {1}".format( pids, self.execname)) return pids[0] elif self.execname: pids = sched_funcs.get_pids_for_process(self._ftrace, self.execname) if pid not in pids: raise RuntimeError( "PID {0} not mapped to {1}".format( pid, self.execname)) else: self.execname = sched_funcs.get_task_name(self._ftrace, pid) return pid
def _populate_pids(self): """Map the input execnames to PIDs""" if len(self._execnames) == 1: return sched_funcs.get_pids_for_process(self._ftrace, self._execnames[0]) pids = [] for proc in self._execnames: pids += sched_funcs.get_pids_for_process(self._ftrace, proc) return list(set(pids))
def _populate_pids(self, run): """Populate the qualifying PIDs from the run""" if len(self._execnames) == 1: return sched_funcs.get_pids_for_process(run, self._execnames[0]) pids = [] for proc in self._execnames: pids += sched_funcs.get_pids_for_process(run, proc) return list(set(pids))
def test_get_pids_for_process_funny_process_names(self): """get_pids_for_process() works when a process name is a substring of another""" from bart.sched.functions import get_pids_for_process trace_file = "trace.txt" raw_trace_file = "trace.raw.txt" in_data = """ <idle>-0 [001] 10826.894644: sched_switch: prev_comm=swapper/1 prev_pid=0 prev_prio=120 prev_state=0 next_comm=rt-app next_pid=3268 next_prio=120 wmig-3268 [001] 10826.894778: sched_switch: prev_comm=wmig prev_pid=3268 prev_prio=120 prev_state=1 next_comm=rt-app next_pid=3269 next_prio=120 wmig1-3269 [001] 10826.905152: sched_switch: prev_comm=wmig1 prev_pid=3269 prev_prio=120 prev_state=1 next_comm=wmig next_pid=3268 next_prio=120 wmig-3268 [001] 10826.915384: sched_switch: prev_comm=wmig prev_pid=3268 prev_prio=120 prev_state=1 next_comm=swapper/1 next_pid=0 next_prio=120 <idle>-0 [005] 10826.995169: sched_switch: prev_comm=swapper/5 prev_pid=0 prev_prio=120 prev_state=0 next_comm=wmig1 next_pid=3269 next_prio=120 wmig1-3269 [005] 10827.007064: sched_switch: prev_comm=wmig1 prev_pid=3269 prev_prio=120 prev_state=0 next_comm=wmig next_pid=3268 next_prio=120 wmig-3268 [005] 10827.019061: sched_switch: prev_comm=wmig prev_pid=3268 prev_prio=120 prev_state=0 next_comm=wmig1 next_pid=3269 next_prio=120 wmig1-3269 [005] 10827.031061: sched_switch: prev_comm=wmig1 prev_pid=3269 prev_prio=120 prev_state=0 next_comm=wmig next_pid=3268 next_prio=120 wmig-3268 [005] 10827.050645: sched_switch: prev_comm=wmig prev_pid=3268 prev_prio=120 prev_state=1 next_comm=swapper/5 next_pid=0 next_prio=120 """ # We create an empty trace.txt to please trappy ... with open(trace_file, "w") as fout: fout.write("") # ... but we only put the sched_switch events in the raw trace # file because that's where trappy is going to look for with open(raw_trace_file, "w") as fout: fout.write(in_data) trace = trappy.FTrace(trace_file) self.assertEquals(get_pids_for_process(trace, "wmig"), [3268])
def test_get_pids_for_processes_no_sched_switch(self): """get_pids_for_processes() raises an exception if the trace doesn't have a sched_switch event""" from bart.sched.functions import get_pids_for_process trace_file = "trace.txt" raw_trace_file = "trace.raw.txt" with open(trace_file, "w") as fout: fout.write("") with open(raw_trace_file, "w") as fout: fout.write("") trace = trappy.FTrace(trace_file) with self.assertRaises(ValueError): get_pids_for_process(trace, "foo")
def test_get_pids_for_process_funny_process_names(self): """get_pids_for_process() works when a process name is a substring of another""" from bart.sched.functions import get_pids_for_process trace_file = "trace.txt" in_data = """ <idle>-0 [001] 10826.894644: sched_switch: prev_comm=swapper/1 prev_pid=0 prev_prio=120 prev_state=0 next_comm=rt-app next_pid=3268 next_prio=120 wmig-3268 [001] 10826.894778: sched_switch: prev_comm=wmig prev_pid=3268 prev_prio=120 prev_state=1 next_comm=rt-app next_pid=3269 next_prio=120 wmig1-3269 [001] 10826.905152: sched_switch: prev_comm=wmig1 prev_pid=3269 prev_prio=120 prev_state=1 next_comm=wmig next_pid=3268 next_prio=120 wmig-3268 [001] 10826.915384: sched_switch: prev_comm=wmig prev_pid=3268 prev_prio=120 prev_state=1 next_comm=swapper/1 next_pid=0 next_prio=120 <idle>-0 [005] 10826.995169: sched_switch: prev_comm=swapper/5 prev_pid=0 prev_prio=120 prev_state=0 next_comm=wmig1 next_pid=3269 next_prio=120 wmig1-3269 [005] 10827.007064: sched_switch: prev_comm=wmig1 prev_pid=3269 prev_prio=120 prev_state=0 next_comm=wmig next_pid=3268 next_prio=120 wmig-3268 [005] 10827.019061: sched_switch: prev_comm=wmig prev_pid=3268 prev_prio=120 prev_state=0 next_comm=wmig1 next_pid=3269 next_prio=120 wmig1-3269 [005] 10827.031061: sched_switch: prev_comm=wmig1 prev_pid=3269 prev_prio=120 prev_state=0 next_comm=wmig next_pid=3268 next_prio=120 wmig-3268 [005] 10827.050645: sched_switch: prev_comm=wmig prev_pid=3268 prev_prio=120 prev_state=1 next_comm=swapper/5 next_pid=0 next_prio=120 """ with open(trace_file, "w") as fout: fout.write(in_data) trace = trappy.FTrace(trace_file) self.assertEquals(get_pids_for_process(trace, "wmig"), [3268])