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
|
#!/usr/bin/env python
#
# $Id: iotop.py 1160 2011-10-14 18:50:36Z g.rodola@gmail.com $
#
# Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
Shows real-time network statistics.
Author: Giampaolo Rodola' <g.rodola@gmail.com>
"""
import sys
import os
if os.name != 'posix':
sys.exit('platform not supported')
import curses
import atexit
import time
import psutil
# --- curses stuff
def tear_down():
win.keypad(0)
curses.nocbreak()
curses.echo()
curses.endwin()
win = curses.initscr()
atexit.register(tear_down)
curses.endwin()
lineno = 0
def print_line(line, highlight=False):
"""A thin wrapper around curses's addstr()."""
global lineno
try:
if highlight:
line += " " * (win.getmaxyx()[1] - len(line))
win.addstr(lineno, 0, line, curses.A_REVERSE)
else:
win.addstr(lineno, 0, line, 0)
except curses.error:
lineno = 0
win.refresh()
raise
else:
lineno += 1
# --- curses stuff
def bytes2human(n):
"""
>>> bytes2human(10000)
'9.8 K'
>>> bytes2human(100001221)
'95.4 M'
"""
symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
prefix = {}
for i, s in enumerate(symbols):
prefix[s] = 1 << (i+1)*10
for s in reversed(symbols):
if n >= prefix[s]:
value = float(n) / prefix[s]
return '%.2f %s' % (value, s)
return "0.00 B"
def poll(interval):
"""Retrieve raw stats within an interval window."""
tot_before = psutil.network_io_counters()
pnic_before = psutil.network_io_counters(pernic=True)
# sleep some time
time.sleep(interval)
tot_after = psutil.network_io_counters()
pnic_after = psutil.network_io_counters(pernic=True)
return (tot_before, tot_after, pnic_before, pnic_after)
def refresh_window(tot_before, tot_after, pnic_before, pnic_after):
"""Print stats on screen."""
global lineno
# totals
print_line("total bytes: sent: %-10s received: %s" \
% (bytes2human(tot_after.bytes_sent),
bytes2human(tot_after.bytes_recv))
)
print_line("total packets: sent: %-10s received: %s" \
% (tot_after.packets_sent, tot_after.packets_recv)
)
# per network interface
print_line("")
for nic in pnic_after:
stats_before = pnic_before[nic]
stats_after = pnic_after[nic]
templ = "%-15s %15s %15s"
print_line(templ % (
nic, "TOTAL", "PER-SEC"),
highlight=True
)
print_line(templ % (
"bytes-sent",
bytes2human(stats_after.bytes_sent),
bytes2human(stats_after.bytes_sent - stats_before.bytes_sent) + '/s',
))
print_line(templ % (
"bytes-recv",
bytes2human(stats_after.bytes_recv),
bytes2human(stats_after.bytes_recv - stats_before.bytes_recv) + '/s',
))
print_line(templ % (
"pkts-sent",
stats_after.packets_sent,
stats_after.packets_sent - stats_before.packets_sent,
))
print_line(templ % (
"pkts-recv",
stats_after.packets_recv,
stats_after.packets_recv - stats_before.packets_recv,
))
print_line("")
win.refresh()
lineno = 0
def main():
try:
interval = 0
while 1:
args = poll(interval)
refresh_window(*args)
interval = 1
except (KeyboardInterrupt, SystemExit):
print
if __name__ == '__main__':
main()
|
