http://www.inwap.com/mybin/miscunix/?z1gb

You snarky little git who thinks that dd is only used by guys over 60 years old. Humph.

#!/usr/bin/env python
#
# FPMurphy 11/21/08 – Based on Redhat Magazine article
#

import sys
import os
import commands
import re
from optparse import OptionParser
import urllib
import urllib2
import pygtk
pygtk.require(‘2.0′)
import gtk

class DisplayGraph:

def delete_event(self, widget, event, data=None):
return False

def destroy(self, widget, data=None):
gtk.main_quit()

def __init__(self):
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.connect(“delete_event”, self.delete_event)
self.window.connect(“destroy”, self.destroy)
self.window.set_border_width(10)
self.window.set_position(gtk.WIN_POS_CENTER)
self.window.set_title(“Disk Throughput”)
pixbuf = gtk.gdk.pixbuf_new_from_file(“/tmp/dd.png”)
os.remove(“/tmp/dd.png”)

self.image = gtk.Image()
self.image.set_from_pixbuf(pixbuf)
self.image.show()
self.window.add(self.image)
self.window.show()

def main(self):
gtk.main()

class GoogleChart:

def __init__(self):
self.gchart_url = “http://chart.apis.google.com/chart?”
self.gchart_type = “cht=bvs”
self.gchart_size = “&chs=400×250″
self.gchart_axis_labels = “&chxt=x,y,x,y”
self.gchart_axis_position = “&chxp=2,50|3,50″
self.gchart_data = “&chd=t:”
self.gchart_labels = “&chxl=0:|”
self.gchart_title = “&chtt=”
self.gchart_bar_settings = “&chbh=30,15″

def title(self,title):
self.gchart_title = self.gchart_title + title

def write(self, data, labels, max_t):
self.gchart_data = self.gchart_data + data.rstrip(‘,’)
self.gchart_labels = self.gchart_labels + labels + “2:|Block%20Size|3:|Mb/s”
self.gchart_axis_range = “&chxr=1,0,” + str(max_t+10.0)
self.gchart_scaling = “&chds=0,” + str(max_t+10.0)
self.gchart_url += self.gchart_type + self.gchart_title + self.gchart_size
self.gchart_url += self.gchart_bar_settings + self.gchart_data + self.gchart_labels
self.gchart_url += self.gchart_axis_labels + self.gchart_axis_position
self.gchart_url += self.gchart_axis_range + self.gchart_scaling

opener = urllib2.urlopen(self.gchart_url)
if opener.headers['content-type'] != ‘image/png’:
raise BadContentTypeException(‘Server responded with a ‘ \
‘content-type of %s’ % opener.headers['content-type'])
open(“/tmp/dd.png”, ‘wb’).write(opener.read())

def get_disk_throughput(device, blocksize):
blocksize = str(blocksize) + ‘k’
cmd = “dd if=/dev/zero of=%s bs=%s” % (device, blocksize)
output = commands.getoutput(cmd)
throughput = 0
unit = “”
for line in output.split(‘n’):
s = re.search(‘ copied,.*, (\S+) (\S+)$’, line)
if s:
throughput = s.group(1)
unit = s.group(2)
break
return (throughput, unit)

if __name__ == “__main__”:
usage = “usage: %prog options”
parser = OptionParser(usage=usage)
parser.add_option(“-d”, “–device”, dest=”device”, \
help=”Disk device to operate on (NOTE: any data on that device will be lost)”)
(options, args) = parser.parse_args()
device = options.device
if not device:
parser.print_help()
sys.exit(1)

max_t = 0.0
blocksizes = [128, 256, 512, 1024, 2048, 4096, 8192]
data=”"
labels=”"
for blocksize in blocksizes:
(t, u) = get_disk_throughput(device, blocksize)
if float(t) > max_t:
max_t = float(t)
data += str(t) + “,”
labels += str(blocksize) + “k” + “|”

chart = GoogleChart()
chart.title(device)
chart.write(data, labels, max_t)

graph = DisplayGraph()
graph.main()

The version in this article _does not work_

Traceback (most recent call last):
File “foo.py”, line 34, in
(t, u) = get_disk_throughput(device, blocksize)
File “foo.py”, line 19, in get_disk_throughput
return (throughput, unit)
UnboundLocalError: local variable ‘unit’ referenced before assignment

Copy here:
http://pastebin.com/m7526b1ea