parse_dht_rtt.py

   1 #!/usr/bin/python
   2
   3 import sys
   4 import os
   5
   6 quantize = 200
   7 max_rtt = 10000
   8
   9 f = open(sys.argv[1])
  10 distribution = {}
  11 num_messages = 0
  12
  13 for i in range(0, max_rtt, quantize):
  14         distribution[i] = 0
  15
  16 for line in f:
  17         time = int(line.split('\t')[1])
  18         if (time < 0 or time > max_rtt): continue
  19         num_messages += 1
  20         time /= quantize
  21         time *= quantize
  22         distribution[time] += 1
  23
  24 f = open('round_trip_distribution.log', 'w+')
  25
  26 for k, v in distribution.items():
  27         print >>f, '%f %d' % ((k + (quantize / 2)) / 1000.0, v)
  28 f.close();
  29
  30 f = open('round_trip_distribution.gnuplot', 'w+')
  31
  32 f.write('''
  33 set term png size 1200,700
  34 set title "Message round trip times"
  35 set terminal postscript
  36 set ylabel "# of requests"
  37 set xlabel "Round trip time (seconds)"
  38 set grid
  39 set style fill solid border -1 pattern 2
  40 set output "round_trip_distribution.ps"
  41 set boxwidth %f
  42 plot "round_trip_distribution.log" using 1:2 title "requests" with boxes
  43
  44 set terminal png small
  45 set output "round_trip_distribution.png"
  46 replot
  47 ''' % (float(quantize) / 1000.0))
  48 f.close()
  49
  50 os.system('gnuplot round_trip_distribution.gnuplot');
  51