X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bindings%2Fpython%2Fexamples%2Fsoftirqtimes.py;fp=bindings%2Fpython%2Fexamples%2Fsoftirqtimes.py;h=903bf3ea3b5285e2f0d061d179f236010a4207c5;hb=24a3136a3837ee43162b1393827faa938f0789eb;hp=0000000000000000000000000000000000000000;hpb=2002e48a9f3f38f95de0b9cd75a6ab1f06580c95;p=babeltrace.git

diff --git a/bindings/python/examples/softirqtimes.py b/bindings/python/examples/softirqtimes.py
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+++ b/bindings/python/examples/softirqtimes.py
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+# 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"] )