1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
# Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
#
# Use of this source code is governed by a BSD-style license
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS. All contributing project authors may
# be found in the AUTHORS file in the root of the source tree.
# To run this script please copy "out/<build_name>/pyproto/webrtc/rtc_tools/
# network_tester/network_tester_packet_pb2.py" next to this script.
# The you can run this script with:
# "python parse_packet_log.py -f packet_log.dat"
# for more information call:
# "python parse_packet_log.py --help"
from optparse import OptionParser
import struct
import matplotlib.pyplot as plt
import network_tester_packet_pb2
def GetSize(file_to_parse):
data = file_to_parse.read(1)
if data == '':
return 0
return struct.unpack('<b', data)[0]
def ParsePacketLog(packet_log_file_to_parse):
packets = []
with open(packet_log_file_to_parse, 'rb') as file_to_parse:
while True:
size = GetSize(file_to_parse)
if size == 0:
break
try:
packet = network_tester_packet_pb2.NetworkTesterPacket()
packet.ParseFromString(file_to_parse.read(size))
packets.append(packet)
except IOError:
break
return packets
def GetTimeAxis(packets):
first_arrival_time = packets[0].arrival_timestamp
return [(packet.arrival_timestamp - first_arrival_time) / 1000000.0
for packet in packets]
def CreateSendTimeDiffPlot(packets, plot):
first_send_time_diff = (packets[0].arrival_timestamp -
packets[0].send_timestamp)
y = [(packet.arrival_timestamp - packet.send_timestamp) -
first_send_time_diff for packet in packets]
plot.grid(True)
plot.set_title("SendTime difference [us]")
plot.plot(GetTimeAxis(packets), y)
class MovingAverageBitrate(object):
def __init__(self):
self.packet_window = []
self.window_time = 1000000
self.bytes = 0
self.latest_packet_time = 0
self.send_interval = 0
def RemoveOldPackets(self):
for packet in self.packet_window:
if (self.latest_packet_time - packet.arrival_timestamp >
self.window_time):
self.bytes = self.bytes - packet.packet_size
self.packet_window.remove(packet)
def AddPacket(self, packet):
"""This functions returns bits / second"""
self.send_interval = packet.arrival_timestamp - self.latest_packet_time
self.latest_packet_time = packet.arrival_timestamp
self.RemoveOldPackets()
self.packet_window.append(packet)
self.bytes = self.bytes + packet.packet_size
return self.bytes * 8
def CreateReceiveBiratePlot(packets, plot):
bitrate = MovingAverageBitrate()
y = [bitrate.AddPacket(packet) for packet in packets]
plot.grid(True)
plot.set_title("Receive birate [bps]")
plot.plot(GetTimeAxis(packets), y)
def CreatePacketlossPlot(packets, plot):
packets_look_up = {}
first_sequence_number = packets[0].sequence_number
last_sequence_number = packets[-1].sequence_number
for packet in packets:
packets_look_up[packet.sequence_number] = packet
y = []
x = []
first_arrival_time = 0
last_arrival_time = 0
last_arrival_time_diff = 0
for sequence_number in range(first_sequence_number,
last_sequence_number + 1):
if sequence_number in packets_look_up:
y.append(0)
if first_arrival_time == 0:
first_arrival_time = packets_look_up[
sequence_number].arrival_timestamp
x_time = (packets_look_up[sequence_number].arrival_timestamp -
first_arrival_time)
if last_arrival_time != 0:
last_arrival_time_diff = x_time - last_arrival_time
last_arrival_time = x_time
x.append(x_time / 1000000.0)
else:
if last_arrival_time != 0 and last_arrival_time_diff != 0:
x.append(
(last_arrival_time + last_arrival_time_diff) / 1000000.0)
y.append(1)
plot.grid(True)
plot.set_title("Lost packets [0/1]")
plot.plot(x, y)
def main():
parser = OptionParser()
parser.add_option("-f",
"--packet_log_file",
dest="packet_log_file",
help="packet_log file to parse")
options = parser.parse_args()[0]
packets = ParsePacketLog(options.packet_log_file)
f, plots = plt.subplots(3, sharex=True)
plt.xlabel('time [sec]')
CreateSendTimeDiffPlot(packets, plots[0])
CreateReceiveBiratePlot(packets, plots[1])
CreatePacketlossPlot(packets, plots[2])
f.subplots_adjust(hspace=0.3)
plt.show()
if __name__ == "__main__":
main()
|
