if len(sys.argv) < 2 or len(sys.argv) > 3:
raise TypeError("Usage: python sched_switch.py [pid] path/to/trace")
elif len(sys.argv) == 3:
- usePID = True
+ filterPID = True
else:
- usePID = False
+ filterPID = False
traces = TraceCollection()
ret = traces.add_trace(sys.argv[len(sys.argv)-1], "ctf")
raise IOError("Error adding trace")
for event in traces.events:
- while True:
- if event.name == "sched_switch":
- # Getting PID
- pid = event.field_with_scope("pid", CTFScope.STREAM_EVENT_CONTEXT)
- if pid is None:
- print("ERROR: Missing PID info for sched_switch")
- break # Next event
+ if event.name != "sched_switch":
+ continue
- if usePID and (pid != long(sys.argv[1])):
- break # Next event
+ # Getting PID
+ pid = event.field_with_scope("pid", CTFScope.STREAM_EVENT_CONTEXT)
+ if pid is None:
+ print("ERROR: Missing PID info for sched_switch")
+ continue # Next event
- prev_comm = event["prev_comm"]
- prev_tid = event["prev_tid"]
- prev_prio = event["prev_prio"]
- prev_state = event["prev_state"]
- next_comm = event["next_comm"]
- next_tid = event["next_tid"]
- next_prio = event["next_prio"]
+ if filterPID and (pid != long(sys.argv[1])):
+ continue # Next event
- # Output
- print("sched_switch, pid = {}, TS = {}, prev_comm = {},\n\t"
- "prev_tid = {}, prev_prio = {}, prev_state = {},\n\t"
- "next_comm = {}, next_tid = {}, next_prio = {}".format(
- pid, event.timestamp, prev_comm, prev_tid,
- prev_prio, prev_state, next_comm, next_tid, next_prio))
+ prev_comm = event["prev_comm"]
+ prev_tid = event["prev_tid"]
+ prev_prio = event["prev_prio"]
+ prev_state = event["prev_state"]
+ next_comm = event["next_comm"]
+ next_tid = event["next_tid"]
+ next_prio = event["next_prio"]
- break # Next event
+ # Output
+ print("sched_switch, pid = {}, TS = {}, prev_comm = {},\n\t"
+ "prev_tid = {}, prev_prio = {}, prev_state = {},\n\t"
+ "next_comm = {}, next_tid = {}, next_prio = {}".format(
+ pid, event.timestamp, prev_comm, prev_tid,
+ prev_prio, prev_state, next_comm, next_tid, next_prio))