+++ /dev/null
-#!/usr/bin/env python3
-# sched_switch.py
-#
-# Babeltrace example script with sched_switch events
-#
-# Copyright 2012 EfficiOS Inc.
-#
-# Author: Danny Serres <danny.serres@efficios.com>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-
-# The script takes one optional argument (pid)
-# The script will read events based on pid and
-# print the scheduler switches happening with the process.
-# If no arguments are passed, it displays all the scheduler switches.
-# This can be used to understand which tasks schedule out the current
-# process being traced, and when it gets scheduled in again.
-# The trace needs PID context (lttng add-context -k -t pid)
-
-import sys
-import babeltrace.reader
-import babeltrace.common
-
-
-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:
- filterPID = True
-else:
- filterPID = False
-
-traces = babeltrace.reader.TraceCollection()
-ret = traces.add_trace(sys.argv[len(sys.argv) - 1], "ctf")
-if ret is None:
- raise IOError("Error adding trace")
-
-for event in traces.events:
- if event.name != "sched_switch":
- continue
-
- # Getting PID
- pid = event.field_with_scope("pid", babeltrace.common.CTFScope.STREAM_EVENT_CONTEXT)
- if pid is None:
- print("ERROR: Missing PID info for sched_switch")
- continue # Next event
-
- if filterPID and (pid != long(sys.argv[1])):
- 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"]
-
- # 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))