/usr/share/doc/python-psutil-doc/examples/iotop.py is in python-psutil-doc 5.4.2-1.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | #!/usr/bin/env python
# Copyright (c) 2009, 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.
"""
A clone of iotop (http://guichaz.free.fr/iotop/) showing real time
disk I/O statistics.
It works on Linux only (FreeBSD and OSX are missing support for IO
counters).
It doesn't work on Windows as curses module is required.
Example output:
$ python scripts/iotop.py
Total DISK READ: 0.00 B/s | Total DISK WRITE: 472.00 K/s
PID USER DISK READ DISK WRITE COMMAND
13155 giampao 0.00 B/s 428.00 K/s /usr/bin/google-chrome-beta
3260 giampao 0.00 B/s 0.00 B/s bash
3779 giampao 0.00 B/s 0.00 B/s gnome-session --session=ubuntu
3830 giampao 0.00 B/s 0.00 B/s /usr/bin/dbus-launch
3831 giampao 0.00 B/s 0.00 B/s //bin/dbus-daemon --fork --print-pid 5
3841 giampao 0.00 B/s 0.00 B/s /usr/lib/at-spi-bus-launcher
3845 giampao 0.00 B/s 0.00 B/s /bin/dbus-daemon
3848 giampao 0.00 B/s 0.00 B/s /usr/lib/at-spi2-core/at-spi2-registryd
3862 giampao 0.00 B/s 0.00 B/s /usr/lib/gnome-settings-daemon
Author: Giampaolo Rodola' <g.rodola@gmail.com>
"""
import atexit
import time
import sys
try:
import curses
except ImportError:
sys.exit('platform not supported')
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/s'
>>> bytes2human(100001221)
'95.4 M/s'
"""
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/s' % (value, s)
return '%.2f B/s' % (n)
def poll(interval):
"""Calculate IO usage by comparing IO statics before and
after the interval.
Return a tuple including all currently running processes
sorted by IO activity and total disks I/O activity.
"""
# first get a list of all processes and disk io counters
procs = [p for p in psutil.process_iter()]
for p in procs[:]:
try:
p._before = p.io_counters()
except psutil.Error:
procs.remove(p)
continue
disks_before = psutil.disk_io_counters()
# sleep some time
time.sleep(interval)
# then retrieve the same info again
for p in procs[:]:
with p.oneshot():
try:
p._after = p.io_counters()
p._cmdline = ' '.join(p.cmdline())
if not p._cmdline:
p._cmdline = p.name()
p._username = p.username()
except (psutil.NoSuchProcess, psutil.ZombieProcess):
procs.remove(p)
disks_after = psutil.disk_io_counters()
# finally calculate results by comparing data before and
# after the interval
for p in procs:
p._read_per_sec = p._after.read_bytes - p._before.read_bytes
p._write_per_sec = p._after.write_bytes - p._before.write_bytes
p._total = p._read_per_sec + p._write_per_sec
disks_read_per_sec = disks_after.read_bytes - disks_before.read_bytes
disks_write_per_sec = disks_after.write_bytes - disks_before.write_bytes
# sort processes by total disk IO so that the more intensive
# ones get listed first
processes = sorted(procs, key=lambda p: p._total, reverse=True)
return (processes, disks_read_per_sec, disks_write_per_sec)
def refresh_window(procs, disks_read, disks_write):
"""Print results on screen by using curses."""
curses.endwin()
templ = "%-5s %-7s %11s %11s %s"
win.erase()
disks_tot = "Total DISK READ: %s | Total DISK WRITE: %s" \
% (bytes2human(disks_read), bytes2human(disks_write))
print_line(disks_tot)
header = templ % ("PID", "USER", "DISK READ", "DISK WRITE", "COMMAND")
print_line(header, highlight=True)
for p in procs:
line = templ % (
p.pid,
p._username[:7],
bytes2human(p._read_per_sec),
bytes2human(p._write_per_sec),
p._cmdline)
try:
print_line(line)
except curses.error:
break
win.refresh()
def main():
try:
interval = 0
while True:
args = poll(interval)
refresh_window(*args)
interval = 1
except (KeyboardInterrupt, SystemExit):
pass
if __name__ == '__main__':
main()
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