premiere-libtorrent/parse_dht_log.py

#! /usr/bin/env python
import sys
import os
import time
import calendar

up_time_quanta = 2000

f = open(sys.argv[1])

announce_histogram = {}
node_uptime_histogram = {}

counter = 0;

# maps search_id to a list of events. Each event is a dict containing:
#  t: timestamp
#  d: distance (from target)
#  o: outstanding searches
#  e: event (NEW, COMPLETED, ADD, INVOKE, TIMEOUT)
outstanding_searches = {}

# list of completed searches
searches = []

def convert_timestamp(t):
	parts = t.split('.')
	posix = time.strptime(parts[0], '%H:%M:%S')
	return (posix.tm_hour * 3600 + posix.tm_min * 60 + posix.tm_sec) * 1000 + int(parts[1])

for line in f:
	counter += 1
#	if counter % 1000 == 0:
#		print '\r%d' % counter,
	try:
		l = line.split(' ')
		if 'announce-distance:' in line:
			idx = l.index('announce-distance:')

			d = int(l[idx+1].strip())
			if not d in announce_histogram: announce_histogram[d] = 0
			announce_histogram[d] += 1
		if 'NODE FAILED' in line:
			idx = l.index('fails:')
			if int(l[idx+1].strip()) != 1: continue;
			idx = l.index('up-time:')
			d = int(l[idx+1].strip())
			# quantize
			d = d - (d % up_time_quanta)
			if not d in node_uptime_histogram: node_uptime_histogram[d] = 0
			node_uptime_histogram[d] += 1

		search_id = l[2]
		ts = l[0]
		event = l[3]

		if event == 'NEW':
			outstanding_searches[search_id] = [{ 't': ts, 'd': 160, 'o': 0, 'e': 'NEW'}]
		elif event == 'INVOKE' or event == 'ADD' or event == '1ST_TIMEOUT' or event == 'TIMEOUT' or event == 'PEERS':
			if not search_id in outstanding_searches:
				print 'orphaned event: %s' % line
			else:
				outstanding = int(l[l.index('invoke-count:')+1])
				distance = int(l[l.index('distance:')+1])
				outstanding_searches[search_id].append({ 't': ts, 'd': distance, 'o': outstanding + 1, 'e': event})
		elif event == 'COMPLETED':
				distance = int(l[l.index('distance:')+1])
				outstanding_searches[search_id].append({ 't': ts, 'd': distance, 'o': 0, 'e': event})

				s = outstanding_searches[search_id]

				try:
					start_time = convert_timestamp(s[0]['t'])
					for i in range(len(s)):
						s[i]['t'] = convert_timestamp(s[i]['t']) - start_time
				except:
					pass
				searches.append(s)
				del outstanding_searches[search_id]

				

	except Exception, e:
		print line.split(' ')

lookup_times_min = []
lookup_times_max = []
for s in searches:
	for i in s:
		if i['e'] != 'PEERS': continue
		lookup_times_min.append(i['t'])
		break
	for i in reversed(s):
		if i['e'] != 'PEERS': continue
		lookup_times_max.append(i['t'])
		break

lookup_times_min.sort()
lookup_times_max.sort()
out = open('dht_lookup_times_cdf.txt', 'w+')
counter = 0
for i in range(len(lookup_times_min)):
	counter += 1
	print >>out, '%d\t%d\t%f' % (lookup_times_min[i], lookup_times_max[i], counter / float(len(lookup_times_min)))
out.close()

out = open('dht_lookups.txt', 'w+')
for s in searches:
	for i in s:
		if i['e'] == 'INVOKE':
			print >>out, ' ->', i['t'], i['d']
		elif i['e'] == '1ST_TIMEOUT':
			print >>out, ' x ', i['t'], i['d']
		elif i['e'] == 'TIMEOUT':
			print >>out, ' X ', i['t'], i['d']
		elif i['e'] == 'PEERS':
			print >>out, ' <-', i['t'], i['d']
		elif i['e'] == 'COMPLETED':
			print >>out, '***', i['t'], i['d'], '\n'
			break
out.close()

out = open('dht_announce_distribution.dat', 'w+')
print 'announce distribution items: %d' % len(announce_histogram)
for k,v in announce_histogram.items():
	print >>out, '%d %d' % (k, v)
	print '%d %d' % (k, v)
out.close()

out = open('dht_node_uptime_distribution.dat', 'w+')
print 'node uptimes: %d' % len(node_uptime_histogram)
for k,v in node_uptime_histogram.items():
	print >>out, '%d %d' % (k + up_time_quanta/2, v)
out.close()

out = open('dht.gnuplot', 'w+')
out.write('''
set term png size 1200,700 small
set output "dht_lookup_times_cdf.png"
set title "portion of lookups that have received at least one data response"
set ylabel "portion of lookups"
set xlabel "time from start of lookup (ms)"
set grid
plot "dht_lookup_times_cdf.txt" using 1:3 with lines title "time to first result", \
	"dht_lookup_times_cdf.txt" using 2:3 with lines title "time to last result"

set terminal postscript
set output "dht_lookup_times_cdf.ps"
replot

set term png size 1200,700 small
set xtics 100
set xrange [0:2000]
set output "dht_min_lookup_times_cdf.png"
plot "dht_lookup_times_cdf.txt" using 1:3 with lines title "time to first result"

set terminal postscript
set output "dht_min_lookup_times_cdf.ps"
replot

set term png size 1200,700 small
set output "dht_node_uptime_distribution.png"
set xrange [*:*]
set title "node up time"
set ylabel "# of nodes"
set xlabel "uptime (seconds)"
set xtics auto
unset grid
set boxwidth %f
set style fill solid border -1 pattern 2
plot  "dht_node_uptime_distribution.dat" using 1:2 title "nodes" with boxes

set term png size 1200,700 small
set output "dht_announce_distribution.png"
set xrange [0:*]
set title "bucket # announces are made against relative to target node-id"
set ylabel "# of announces"
set style fill solid border -1 pattern 2
plot  "dht_announce_distribution.dat" using 1:2 title "announces" with boxes

set terminal postscript
set output "dht_announce_distribution.ps"
replot

''' % up_time_quanta)


out.close()

os.system('gnuplot dht.gnuplot');