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#!/usr/bin/python
# Copyright (c) 2010 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Parse NetLog output and reformat it to display in Gnuplot."""
import math
import optparse
import os
import re
import sys
class Entry(object):
"""A single NetLog line/entry."""
def __init__(self, line):
self.id = -1
self.info = ''
self.time = 0
time_offset = line.find('t=')
if time_offset >= 0:
tmp = line[time_offset + 2:].split(None, 1)
self.time = tmp[0][:-3] + '.' + tmp[0][-3:]
if len(tmp) > 1:
self.info = tmp[1]
else:
self.info = line
self.info = re.sub('\[dt=[0-9 ?]*\]', '', self.info)
self.info = self.info.strip()
class Object(object):
"""A set of Entries that belong to the same NetLog Object."""
def __init__(self, line, id_offset):
self.id = line[id_offset + 4:].rstrip(')')
self.type = line.split(None, 1)[0]
self.entries = []
def SpaceOutEntries(self):
self.__FindGroups(self.__SpaceRange)
def SetRotation(self):
self.__FindGroups(self.__SetRotationRange)
def __FindGroups(self, proc):
first = 0
for i in range(len(self.entries)):
if self.entries[first].time != self.entries[i].time:
proc(first, i - 1)
first = i
proc(first, len(self.entries) - 1)
def __SpaceRange(self, start, end):
if end > start:
gap = math.floor(100/(end - start + 2))
for i in range(start + 1, end + 1):
self.entries[i].time += '%02d'%(gap * (i - start))
def __SetRotationRange(self, start, end):
for i in range(start, end + 1):
self.entries[i].rotation = 85 - (i - start) * 15
def Parse(stream):
"""Parse the NetLog into python objects."""
result = []
request_section = 0
obj = None
entry = None
for line in stream:
line = line.strip()
if line.startswith('Requests'):
request_section = 1
elif line.startswith('Http cache'):
request_section = 0
if request_section:
id_offset = line.find('(id=')
if id_offset >= 0:
obj = Object(line, id_offset)
result.append(obj)
elif line.startswith('(P) t=') or line.startswith('t='):
entry = Entry(line)
obj.entries.append(entry)
elif line.find('source_dependency') >= 0:
new_entry = Entry(line)
new_entry.time = entry.time
new_entry.id = line.split(':')[1].split(',')[0]
obj.entries.append(new_entry)
new_entry = Entry('t=%s '%entry.time.replace('.', ''))
obj.entries.append(new_entry)
elif line.startswith('-->'):
entry.info = entry.info + ' ' + line[4:]
return result
def GnuplotRenderNetlog(netlog, filename, labels):
"""Render a list of NetLog objects into Gnuplot format."""
output = open(filename, 'w')
commands = []
data = []
types = []
commands.append('file="%s"'%filename)
commands.append('set key bottom')
commands.append('set xdata time')
commands.append('set timefmt "%s"')
commands.append('set datafile separator ","')
commands.append('set xlabel "Time (s)"')
commands.append('set ylabel "Netlog ID"')
plot = []
index = 1
for obj in netlog:
if obj.type not in types:
types.append(obj.type)
type_num = types.index(obj.type)
plot.append('file index %d using 1:2 with linespoints lt %d notitle'%(
index, type_num))
obj.SetRotation()
for entry in obj.entries:
graph_id = obj.id
if entry.id > 0:
graph_id = entry.id
data.append('%s,%s'%(entry.time, graph_id))
info = entry.info.replace('"', '')
if info and labels:
commands.append('set label "%s" at "%s", %s rotate by %d'%(
info, entry.time, obj.id, entry.rotation))
data.append('\n')
index += 1
for entry_type in types:
plot.insert(0, '1/0 lt %d title "%s"'%(types.index(entry_type), entry_type))
commands.append('plot ' + ','.join(plot))
commands.append('exit')
result = '\n'.join(commands) + '\n\n\n' + '\n'.join(data)
output.write(result)
output.close()
os.system('gnuplot %s -'%filename)
def main(_):
parser = optparse.OptionParser('usage: %prog [options] dump_file')
parser.add_option_group(
optparse.OptionGroup(parser, 'Additional Info',
'When run, the script will generate a file that can '
'be passed to gnuplot, but will also start gnuplot '
'for you; left click selects a zoom region, u '
'unzooms, middle click adds a marker, and q quits.'))
parser.add_option('-o', '--output', dest='output', help='Output filename')
parser.add_option('-l', '--labels', action='store_true', help='Output labels')
options, args = parser.parse_args()
if not args:
parser.error('Must specify input dump_file.')
if not options.output:
options.output = args[0] + '.gnuplot'
netlog = Parse(open(args[0]))
GnuplotRenderNetlog(netlog, options.output, options.labels)
return 0
if '__main__' == __name__:
ret = main(sys.argv)
sys.exit(ret)
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