+++ /dev/null
-#!/usr/bin/env python2
-# softirqtimes.py
-#
-# Babeltrace time of softirqs example script
-#
-# 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 script checks the number of events in the trace
-# and outputs a table and a .svg histogram for the specified
-# range (microseconds) or the total trace if no range specified.
-# The graph is generated using the cairoplot module.
-
-# The script checks the trace for the amount of time
-# spent from each softirq_raise to softirq_exit.
-# It prints out the min, max (with timestamp),
-# average times, the standard deviation and the total count.
-# Using the cairoplot module, a .svg graph is also outputted
-# showing the taken time in function of the time since the
-# beginning of the trace.
-
-import sys, math
-from output_format_modules import cairoplot
-from babeltrace import *
-
-if len(sys.argv) < 2:
- raise TypeError("Usage: python softirqtimes.py path/to/trace")
-
-ctx = Context()
-ret = ctx.add_trace(sys.argv[1], "ctf")
-if ret is None:
- raise IOError("Error adding trace")
-
-time_taken = []
-graph_data = []
-max_time = (0.0, 0.0) # (val, ts)
-
-# tmp template: {(cpu_id, vec):TS raise}
-tmp = {}
-largest_val = 0
-
-# Setting iterator
-bp = IterPos(SEEK_BEGIN)
-ctf_it = ctf.Iterator(ctx, bp)
-
-# Reading events
-event = ctf_it.read_event()
-start_time = event.get_timestamp()
-while(event is not None):
-
- event_name = event.get_name()
- error = True
- appendNext = False
-
- if event_name == 'softirq_raise' or event_name == 'softirq_exit':
- # Recover cpu_id and vec values to make a key to tmp
- error = False
- scope = event.get_top_level_scope(ctf.scope.STREAM_PACKET_CONTEXT)
- field = event.get_field(scope, "cpu_id")
- cpu_id = field.get_uint64()
- if ctf.field_error():
- print("ERROR: Missing cpu_id info for {}".format(
- event.get_name()))
- error = True
-
- scope = event.get_top_level_scope(ctf.scope.EVENT_FIELDS)
- field = event.get_field(scope, "_vec")
- vec = field.get_uint64()
- if ctf.field_error():
- print("ERROR: Missing vec info for {}".format(
- event.get_name()))
- error = True
- key = (cpu_id, vec)
-
- if event_name == 'softirq_raise' and not error:
- # Add timestamp to tmp
- if key in tmp:
- # If key already exists
- i = 0
- while True:
- # Add index
- key = (cpu_id, vec, i)
- if key in tmp:
- i += 1
- continue
- if i > largest_val:
- largest_val = i
- break
-
- tmp[key] = event.get_timestamp()
-
- if event_name == 'softirq_exit' and not error:
- # Saving data for output
- # Key check
- if not (key in tmp):
- i = 0
- while i <= largest_val:
- key = (key[0], key[1], i)
- if key in tmp:
- break
- i += 1
-
- raise_timestamp = tmp[key]
- time_data = event.get_timestamp() - tmp.pop(key)
- if time_data > max_time[0]:
- # max_time = (val, ts)
- max_time = (time_data, raise_timestamp)
- time_taken.append(time_data)
- graph_data.append((raise_timestamp - start_time, time_data))
-
- # Next Event
- ret = ctf_it.next()
- if ret < 0:
- break
- event = ctf_it.read_event()
-
-
-del ctf_it
-
-# Standard dev. calc.
-try:
- mean = sum(time_taken)/float(len(time_taken))
-except ZeroDivisionError:
- raise TypeError("empty data")
-deviations_squared = []
-for x in time_taken:
- deviations_squared.append(math.pow((x - mean), 2))
-try:
- stddev = math.sqrt(sum(deviations_squared) / (len(deviations_squared) - 1))
-except ZeroDivisionError:
- stddev = '-'
-
-# Terminal output
-print("AVG TIME: {} ns".format(mean))
-print("MIN TIME: {} ns".format(min(time_taken)))
-print("MAX TIME: {} ns, TS: {}".format(max_time[0], max_time[1]))
-print("STD DEV: {}".format(stddev))
-print("TOTAL COUNT: {}".format(len(time_taken)))
-
-# Graph output
-cairoplot.scatter_plot ( 'softirqtimes.svg', data = graph_data,
- width = 5000, height = 4000, border = 20, axis = True,
- grid = True, series_colors = ["red"] )
projects / babeltrace.git / blobdiff