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trace_parser.py
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#!/usr/bin/env python
"""
Copyright 2019 WebPageTest LLC.
Copyright 2016 Google Inc.
Copyright 2020 Catchpoint Systems Inc.
Use of this source code is governed by the Polyform Shield 1.0.0 license that can be
found in the LICENSE.md file.
"""
import gzip
import logging
import math
import os
import re
import sys
import time
if (sys.version_info >= (3, 0)):
from urllib.parse import urlparse # pylint: disable=import-error
unicode = str
GZIP_TEXT = 'wt'
GZIP_READ_TEXT = 'rt'
else:
from urlparse import urlparse # pylint: disable=import-error
GZIP_TEXT = 'w'
GZIP_READ_TEXT = 'r'
# try a fast json parser if it is installed
try:
import ujson as json
except BaseException:
import json
##########################################################################
# Trace processing
##########################################################################
class Trace():
"""Main class"""
def __init__(self):
self.thread_stack = {}
self.ignore_threads = {}
self.threads = {}
self.user_timing = []
self.event_names = {}
self.event_name_lookup = {}
self.scripts = None
self.timeline_events = []
self.timeline_requests = {}
self.trace_events = []
self.interactive = None
self.long_tasks = None
self.interactive_start = 0
self.interactive_end = None
self.start_time = None
self.marked_start_time = None
self.end_time = None
self.cpu = {'main_thread': None, 'main_threads':[], 'subframes': [], 'valid': False}
self.page_data = {'values': {}, 'times': {}}
self.feature_usage = None
self.feature_usage_start_time = None
self.netlog = {'bytes_in': 0, 'bytes_out': 0, 'next_request_id': 1000000}
self.netlog_requests = None
self.netlog_event_types = {}
self.v8stats = None
self.v8stack = {}
self.PRIORITY_MAP = {
"VeryHigh": "Highest",
"HIGHEST": "Highest",
"MEDIUM": "High",
"LOW": "Medium",
"LOWEST": "Low",
"IDLE": "Lowest",
"VeryLow": "Lowest"
}
return
##########################################################################
# Output Logging
##########################################################################
def write_json(self, out_file, json_data):
"""Write out one of the internal structures as a json blob"""
try:
_, ext = os.path.splitext(out_file)
if ext.lower() == '.gz':
with gzip.open(out_file, GZIP_TEXT) as f:
json.dump(json_data, f)
else:
with open(out_file, 'w') as f:
json.dump(json_data, f)
except BaseException:
logging.exception("Error writing to " + out_file)
def WriteUserTiming(self, out_file, dom_tree=None, performance_timing=None):
self.post_process_netlog_events()
out = self.post_process_user_timing(dom_tree, performance_timing)
if out is not None:
self.write_json(out_file, out)
def WriteCPUSlices(self, out_file):
if self.cpu['valid']:
self.write_json(out_file, self.cpu)
def WriteScriptTimings(self, out_file):
if self.scripts is not None:
self.write_json(out_file, self.scripts)
def WriteFeatureUsage(self, out_file):
self.post_process_netlog_events()
out = self.post_process_feature_usage()
if out is not None:
self.write_json(out_file, out)
def WritePageData(self, out_file):
if len(self.page_data) and self.start_time is not None:
out = {}
for key in self.page_data['values']:
out[key] = self.page_data['values'][key]
for key in self.page_data['times']:
value = self.page_data['times'][key]
if value >= self.start_time:
out[key] = int(round(float(value - self.start_time) / 1000.0))
if len(out):
self.write_json(out_file, out)
def WriteInteractive(self, out_file):
# Generate the interactive periods from the long-task data
if self.end_time and self.start_time and self.long_tasks is not None:
interactive = []
end_time = int(math.ceil(float(self.end_time - self.start_time) / 1000.0))
if not self.long_tasks:
interactive.append([0, end_time])
else:
last_end = 0
for task in self.long_tasks:
elapsed = task[0] - last_end
if elapsed > 0:
interactive.append([last_end, task[0]])
last_end = task[1]
elapsed = end_time - last_end
if elapsed > 0:
interactive.append([last_end, end_time])
self.write_json(out_file, interactive)
def WriteLongTasks(self, out_file):
if self.long_tasks is not None:
self.write_json(out_file, self.long_tasks)
def WriteNetlog(self, out_file):
out = self.post_process_netlog_events()
if out is not None:
self.write_json(out_file, out)
def WriteTimelineRequests(self, out_file):
if self.timeline_requests:
self.write_json(out_file, self.timeline_requests)
def WriteV8Stats(self, out_file):
if self.v8stats is not None:
self.v8stats["main_thread"] = self.cpu['main_thread']
self.v8stats["main_threads"] = self.cpu['main_threads']
self.write_json(out_file, self.v8stats)
##########################################################################
# Top-level processing
##########################################################################
def Process(self, trace):
f = None
line_mode = False
self.__init__()
logging.debug("Loading trace: %s", trace)
try:
_, ext = os.path.splitext(trace)
if ext.lower() == '.gz':
f = gzip.open(trace, GZIP_READ_TEXT)
else:
f = open(trace, 'r')
for line in f:
try:
trace_event = json.loads(line.strip("\r\n\t ,"))
if not line_mode and 'traceEvents' in trace_event:
for sub_event in trace_event['traceEvents']:
self.FilterTraceEvent(sub_event)
else:
line_mode = True
self.FilterTraceEvent(trace_event)
except BaseException:
logging.exception('Error processing trace line')
except BaseException:
logging.exception("Error processing trace " + trace)
if f is not None:
f.close()
self.ProcessTraceEvents()
def ProcessTimeline(self, timeline):
self.__init__()
self.cpu['main_thread'] = '0'
self.threads['0'] = {}
events = None
f = None
try:
_, ext = os.path.splitext(timeline)
if ext.lower() == '.gz':
f = gzip.open(timeline, GZIP_READ_TEXT)
else:
f = open(timeline, 'r')
events = json.load(f)
if events:
# convert the old format timeline events into our internal
# representation
for event in events:
if 'method' in event and 'params' in event:
if self.start_time is None:
if event['method'] == 'Network.requestWillBeSent' and \
'timestamp' in event['params']:
self.start_time = event['params']['timestamp'] * 1000000.0
self.end_time = event['params']['timestamp'] * 1000000.0
else:
if 'timestamp' in event['params']:
t = event['params']['timestamp'] * 1000000.0
if t > self.end_time:
self.end_time = t
if event['method'] == 'Timeline.eventRecorded' and \
'record' in event['params']:
e = self.ProcessOldTimelineEvent(
event['params']['record'], None)
if e is not None:
self.timeline_events.append(e)
self.ProcessTimelineEvents()
except BaseException:
logging.exception("Error processing timeline " + timeline)
if f is not None:
f.close()
def FilterTraceEvent(self, trace_event):
cat = trace_event['cat']
if cat == 'toplevel' or cat == 'ipc,toplevel':
return
if cat == 'devtools.timeline' or \
cat == '__metadata' or \
cat.find('devtools.timeline') >= 0 or \
cat.find('blink.feature_usage') >= 0 or \
cat.find('blink.user_timing') >= 0 or \
cat.find('blink.resource') >= 0 or \
cat.find('loading') >= 0 or \
cat.find('navigation') >= 0 or \
cat.find('rail') >= 0 or \
cat.find('netlog') >= 0 or \
cat.find('v8') >= 0:
self.trace_events.append(trace_event)
def ProcessTraceEvents(self):
# sort the raw trace events by timestamp and then process them
if len(self.trace_events):
logging.debug("Sorting %d trace events", len(self.trace_events))
self.trace_events.sort(key=lambda trace_event: trace_event['ts'])
logging.debug("Processing trace events")
for trace_event in self.trace_events:
self.ProcessTraceEvent(trace_event)
self.trace_events = []
# Post-process the netlog events (may shift the start time)
logging.debug("Processing netlog events")
self.post_process_netlog_events()
# Do the post-processing on timeline events
logging.debug("Processing timeline events")
self.ProcessTimelineEvents()
logging.debug("Done processing trace events")
def ProcessTraceEvent(self, trace_event):
cat = trace_event['cat']
if 'ts' in trace_event:
trace_event['ts'] = int(trace_event['ts'])
if cat.find('blink.user_timing') >= 0 or cat.find('rail') >= 0 or \
cat.find('loading') >= 0 or cat.find('navigation') >= 0:
keep = False
if 'args' in trace_event and \
'data' in trace_event['args'] and \
'inMainFrame' in trace_event['args']['data'] and \
trace_event['args']['data']['inMainFrame']:
keep = True
elif 'args' in trace_event and 'frame' in trace_event['args']:
keep = True
elif 'name' in trace_event and trace_event['name'] in [
'navigationStart', 'unloadEventStart', 'redirectStart', 'domLoading']:
keep = True
if keep:
self.user_timing.append(trace_event)
if self.marked_start_time is None and \
'name' in trace_event and \
trace_event['name'].find('navigationStart') >= 0:
if self.start_time is None or trace_event['ts'] < self.start_time:
self.start_time = trace_event['ts']
if self.cpu['main_thread'] is None and 'name' in trace_event and \
trace_event['name'] in ['navigationStart', 'fetchStart']:
thread = '{0}:{1}'.format(trace_event['pid'], trace_event['tid'])
self.cpu['main_thread'] = thread
if thread not in self.cpu['main_threads']:
self.cpu['main_threads'].append(thread)
if 'args' in trace_event and \
'data' in trace_event['args'] and \
'inMainFrame' in trace_event['args']['data'] and \
trace_event['args']['data']['inMainFrame']:
thread = '{0}:{1}'.format(trace_event['pid'], trace_event['tid'])
if thread not in self.cpu['main_threads']:
self.cpu['main_threads'].append(thread)
if cat == '__metadata' and 'name' in trace_event and \
trace_event['name'] == 'process_labels' and \
'pid' in trace_event and 'args' in trace_event and \
'labels' in trace_event['args'] and \
trace_event['args']['labels'].startswith('Subframe:'):
self.cpu['subframes'].append(str(trace_event['pid']))
if cat == '__metadata' and 'name' in trace_event and \
trace_event['name'] == 'thread_name' and \
'args' in trace_event and \
'name' in trace_event['args'] and \
trace_event['args']['name'] == 'CrRendererMain':
thread = '{0}:{1}'.format(trace_event['pid'], trace_event['tid'])
if thread not in self.cpu['main_threads']:
self.cpu['main_threads'].append(thread)
if cat == 'netlog' or cat.find('netlog') >= 0:
self.ProcessNetlogEvent(trace_event)
elif cat == 'devtools.timeline' or cat.find('devtools.timeline') >= 0 or cat.find('blink.resource') >= 0:
self.ProcessTimelineTraceEvent(trace_event)
elif cat.find('blink.feature_usage') >= 0:
self.ProcessFeatureUsageEvent(trace_event)
elif cat.find('content') >= 0:
self.ProcessContentEvent(trace_event)
if cat.find('v8') >= 0:
self.ProcessV8Event(trace_event)
def post_process_user_timing(self, dom_tree, performance_timing):
out = None
if self.user_timing is not None:
self.user_timing.sort(key=lambda trace_event: trace_event['ts'])
out = []
candidates = {}
lcp_event = None
for event in self.user_timing:
try:
consumed = False
if event['cat'].find('loading') >= 0 and 'name' in event:
event['name'] = event['name'].replace('GlobalFirstContentfulPaint', 'FirstContentfulPaint')
if event['name'].startswith('NavStartToLargestContentfulPaint'):
consumed = True
if event['name'].find('Invalidate') >= 0:
lcp_event = None
elif event['name'].find('Candidate') >= 0:
lcp_event = dict(event)
elif event['name'].find('::') >= 0:
consumed = True
(name, trigger) = event['name'].split('::', 1)
name = name[:1].upper() + name[1:]
event['name'] = name
key = name
try:
if 'args' in event:
if 'frame' in event['args']:
key += ':' + event['args']['frame']
if 'data' in event['args'] and 'candidateIndex' in event['args']['data']:
if isinstance(event['args']['data']['candidateIndex'], int):
key += '.{0:d}'.format(event['args']['data']['candidateIndex'])
elif isinstance(event['args']['data']['candidateIndex'], str):
key += '.' + event['args']['data']['candidateIndex']
except Exception:
logging.exception('Error processing user timing event key')
if trigger == 'Candidate':
candidates[key] = dict(event)
elif trigger == 'Invalidate' and key in candidates:
del candidates[key]
if not consumed:
out.append(event)
except Exception:
logging.exception('Error processing user timing event')
has_lcp = False
for name in candidates:
if name.startswith('LargestContentfulPaint'):
has_lcp = True
break
if lcp_event is not None and not has_lcp:
lcp_event['name'] = 'LargestContentfulPaint'
out.append(lcp_event)
for name in candidates:
out.append(candidates[name])
if dom_tree is not None:
for event in out:
if 'args' in event and 'data' in event['args'] and 'DOMNodeId' in event['args']['data']:
node_info = self.FindDomNodeInfo(dom_tree, event['args']['data']['DOMNodeId'])
if node_info is not None:
event['args']['data']['node'] = node_info
if performance_timing:
for event in out:
if 'args' in event and 'data' in event['args']:
if 'size' in event['args']['data'] and event['name'].startswith('LargestContentfulPaint'):
for perf_entry in performance_timing:
if 'entryType' in perf_entry and perf_entry['entryType'] == 'largest-contentful-paint' and 'size' in perf_entry and perf_entry['size'] == event['args']['data']['size'] and 'consumed' not in perf_entry:
perf_entry['consumed'] = True
if 'url' in perf_entry and len(perf_entry['url']) and 'url' not in event['args']['data']:
event['args']['data']['url'] = perf_entry['url']
if 'element' in perf_entry:
event['args']['data']['element'] = perf_entry['element']
elif 'score' in event['args']['data'] and event['name'].startswith('LayoutShift'):
for perf_entry in performance_timing:
if 'entryType' in perf_entry and perf_entry['entryType'] == 'layout-shift' and 'value' in perf_entry and perf_entry['value'] == event['args']['data']['score'] and 'consumed' not in perf_entry:
perf_entry['consumed'] = True
if 'sources' in perf_entry:
event['args']['data']['sources'] = perf_entry['sources']
out.append({'startTime': self.start_time})
return out
def FindDomNodeInfo(self, dom_tree, node_id):
"""Get the information for the given DOM node"""
info = None
try:
if dom_tree is not None:
if 'documents' in dom_tree:
node_index = None
for document in dom_tree['documents']:
if 'nodes' in document and node_index is None:
if 'backendNodeId' in document['nodes']:
for index in range(len(document['nodes']['backendNodeId'])):
if document['nodes']['backendNodeId'][index] == node_id:
node_index = index
break
if node_index is not None:
info = {}
if 'strings' in dom_tree:
if 'nodeName' in document['nodes'] and node_index < len(document['nodes']['nodeName']):
string_index = document['nodes']['nodeName'][node_index]
if string_index >= 0 and string_index < len(dom_tree['strings']):
info['nodeType'] = dom_tree['strings'][string_index]
if 'nodeValue' in document['nodes'] and node_index < len(document['nodes']['nodeValue']):
string_index = document['nodes']['nodeValue'][node_index]
if string_index >= 0 and string_index < len(dom_tree['strings']):
info['nodeValue'] = dom_tree['strings'][string_index]
if 'attributes' in document['nodes'] and node_index < len(document['nodes']['attributes']):
attribute = None
for string_index in document['nodes']['attributes'][node_index]:
string_value = ''
if string_index >= 0 and string_index < len(dom_tree['strings']):
string_value = dom_tree['strings'][string_index]
if attribute is None:
attribute = string_value
else:
if attribute:
if 'attributes' not in info:
info['attributes'] = {}
if attribute in info['attributes']:
info['attributes'][attribute] += ' ' + string_value
else:
info['attributes'][attribute] = string_value
attribute = None
if 'currentSourceURL' in document['nodes']:
if 'index' in document['nodes']['currentSourceURL'] and 'value' in document['nodes']['currentSourceURL']:
for index in range(len(document['nodes']['currentSourceURL']['index'])):
if document['nodes']['currentSourceURL']['index'][index] == node_index:
if index < len(document['nodes']['currentSourceURL']['value']):
string_index = document['nodes']['currentSourceURL']['value'][index]
if string_index >= 0 and string_index < len(dom_tree['strings']):
info['sourceURL'] = dom_tree['strings'][string_index]
break
if 'layout' in document:
if 'nodeIndex' in document['layout']:
for index in range(len(document['layout']['nodeIndex'])):
if document['layout']['nodeIndex'][index] == node_index:
if 'bounds' in document['layout'] and index < len(document['layout']['bounds']):
info['bounds'] = document['layout']['bounds'][index]
if 'text' in document['layout'] and index < len(document['layout']['text']):
string_index = document['layout']['text'][index]
if string_index >= 0 and string_index < len(dom_tree['strings']):
info['layoutText'] = dom_tree['strings'][string_index]
if 'style_names' in dom_tree and 'styles' in document['layout'] and index < len(document['layout']['styles']) and len(document['layout']['styles'][index]) == len(dom_tree['style_names']):
if 'styles' not in info:
info['styles'] = {}
for style_index in range(len(document['layout']['styles'][index])):
string_index = document['layout']['styles'][index][style_index]
if string_index >= 0 and string_index < len(dom_tree['strings']):
info['styles'][dom_tree['style_names'][style_index]] = dom_tree['strings'][string_index]
return info
except Exception:
logging.exception("Error looking up DOM Node")
return info
##########################################################################
# Timeline
##########################################################################
def ProcessTimelineTraceEvent(self, trace_event):
thread = '{0}:{1}'.format(trace_event['pid'], trace_event['tid'])
if trace_event['name'] == 'thread_name' and \
'args' in trace_event and \
'name' in trace_event['args'] and \
trace_event['args']['name'] == 'CrRendererMain' and \
thread not in self.cpu['main_threads']:
self.cpu['main_threads'].append(thread)
# Watch for the marker indicating the start time
if trace_event['name'] == 'ResourceSendRequest' and \
'args' in trace_event and \
'data' in trace_event['args'] and \
'url' in trace_event['args']['data'] and \
trace_event['args']['data']['url'] == 'http://127.0.0.1:8888/wpt-start-recording':
self.marked_start_time = trace_event['ts']
self.start_time = trace_event['ts']
# Keep track of the main thread
if 'args' in trace_event and 'data' in trace_event['args'] and \
thread not in self.ignore_threads:
if 'url' in trace_event['args']['data'] and \
trace_event['args']['data']['url'].startswith('http://127.0.0.1:8888'):
self.ignore_threads[thread] = True
if self.cpu['main_thread'] is None or 'isMainFrame' in trace_event['args']['data']:
if ('isMainFrame' in trace_event['args']['data'] and \
trace_event['args']['data']['isMainFrame']) or \
(trace_event['name'] == 'ResourceSendRequest' and \
'url' in trace_event['args']['data']):
if thread not in self.threads:
self.threads[thread] = {}
if self.marked_start_time is None:
if self.start_time is None or trace_event['ts'] < self.start_time:
self.start_time = trace_event['ts']
self.cpu['main_thread'] = thread
if thread not in self.cpu['main_threads']:
self.cpu['main_threads'].append(thread)
if 'dur' not in trace_event:
trace_event['dur'] = 1
# Make sure each thread has a numerical ID
if self.cpu['main_thread'] is not None and \
thread not in self.threads and \
thread not in self.ignore_threads and \
trace_event['name'] != 'Program':
self.threads[thread] = {}
# Keep track of request events reported by the timeline
request_id = None
has_id = False
if 'args' in trace_event and 'data' in trace_event['args'] and 'requestId' in trace_event['args']['data']:
request_id = trace_event['args']['data']['requestId']
has_id = True
elif 'args' in trace_event and 'url' in trace_event['args']:
request_id = trace_event['args']['url']
if request_id is not None:
if request_id not in self.timeline_requests:
self.timeline_requests[request_id] = {}
request = self.timeline_requests[request_id]
request['has_id'] = has_id
if 'args' in trace_event and 'url' in trace_event['args']:
request['url'] = trace_event['args']['url']
if trace_event['name'] == 'Network.requestIntercepted':
if 'overwrittenURL' in trace_event['args']['data']:
request['overwrittenURL'] = trace_event['args']['data']['overwrittenURL']
if trace_event['name'] == 'ResourceSendRequest':
if 'priority' in trace_event['args']['data']:
request['priority'] = trace_event['args']['data']['priority']
if request['priority'] in self.PRIORITY_MAP:
request['priority'] = self.PRIORITY_MAP[request['priority']]
if 'frame' in trace_event['args']['data']:
request['frame'] = trace_event['args']['data']['frame']
if 'renderBlocking' in trace_event['args']['data']:
request['renderBlocking'] = trace_event['args']['data']['renderBlocking']
if trace_event['name'] == 'ResourceFetcher::WarnUnusedPreloads':
request['preloadUnused'] = 'true'
if trace_event['name'] == 'ResourceFetcher::PrintPreloadMismatch':
request['preloadMismatch'] = 'true'
# Build timeline events on a stack. 'B' begins an event, 'E' ends an
# event
if (thread in self.threads and (
'dur' in trace_event or trace_event['ph'] == 'B' or trace_event['ph'] == 'E')):
trace_event['thread'] = self.threads[thread]
if thread not in self.thread_stack:
self.thread_stack[thread] = []
if trace_event['name'] not in self.event_names:
self.event_names[trace_event['name']] = len(self.event_names)
self.event_name_lookup[self.event_names[trace_event['name']]] = trace_event['name']
if trace_event['name'] not in self.threads[thread]:
self.threads[thread][trace_event['name']] = self.event_names[trace_event['name']]
e = None
if trace_event['ph'] == 'E':
if len(self.thread_stack[thread]) > 0:
e = self.thread_stack[thread].pop()
if e['n'] == self.event_names[trace_event['name']]:
e['e'] = trace_event['ts']
else:
e = {'t': thread, 'n': self.event_names[trace_event['name']], 's': trace_event['ts']}
if trace_event['name'] in ['EvaluateScript', 'v8.compile', 'v8.parseOnBackground'] and \
'args' in trace_event and 'data' in trace_event['args'] and \
'url' in trace_event['args']['data'] and \
trace_event['args']['data']['url'].startswith('http'):
e['js'] = trace_event['args']['data']['url']
if trace_event['name'] == 'FunctionCall' and 'args' in trace_event and 'data' in trace_event['args']:
if 'scriptName' in trace_event['args']['data'] and trace_event['args']['data']['scriptName'].startswith(
'http'):
e['js'] = trace_event['args']['data']['scriptName']
elif 'url' in trace_event['args']['data'] and trace_event['args']['data']['url'].startswith('http'):
e['js'] = trace_event['args']['data']['url'].split('#', 1)[0]
if trace_event['ph'] == 'B':
self.thread_stack[thread].append(e)
e = None
elif 'dur' in trace_event:
e['e'] = e['s'] + trace_event['dur']
if e is not None and 'e' in e and e['s'] >= self.start_time and e['e'] >= e['s']:
if self.end_time is None or e['e'] > self.end_time:
self.end_time = e['e']
# attach it to a parent event if there is one
if len(self.thread_stack[thread]) > 0:
parent = self.thread_stack[thread].pop()
if 'c' not in parent:
parent['c'] = []
parent['c'].append(e)
self.thread_stack[thread].append(parent)
else:
self.timeline_events.append(e)
def ProcessOldTimelineEvent(self, event, type, depth=0):
e = None
thread = '0'
if 'type' in event:
type = event['type']
if type not in self.event_names:
self.event_names[type] = len(self.event_names)
self.event_name_lookup[self.event_names[type]] = type
if type not in self.threads[thread]:
self.threads[thread][type] = self.event_names[type]
start = None
end = None
if 'startTime' in event and 'endTime' in event:
start = event['startTime'] * 1000000.0
end = event['endTime'] * 1000000.0
if 'callInfo' in event:
if 'startTime' in event['callInfo'] and 'endTime' in event['callInfo']:
start = event['callInfo']['startTime'] * 1000000.0
end = event['callInfo']['endTime'] * 1000000.0
if start is not None and end is not None and end >= start and type is not None:
# Keep track of the long tasks
if self.long_tasks is None:
self.long_tasks = []
elapsed = end - start
if depth == 0 and elapsed > 50000:
# make sure this isn't contained within an existing event
ms_start = int(math.floor(start / 1000.0))
ms_end = int(math.ceil(end / 1000.0))
if not self.long_tasks:
# Empty list of long tasks
self.long_tasks.append([ms_start, ms_end])
else:
last_start = self.long_tasks[-1][0]
last_end = self.long_tasks[-1][1]
if ms_start >= last_end:
# This task is entirely after the last long task we know about
self.long_tasks.append([ms_start, ms_end])
elif ms_end > last_end:
# task extends beyond the previous end of the long tasks but overlaps
del self.long_tasks[-1]
if ms_start >= last_start:
self.long_tasks.append([last_start, ms_end])
else:
self.long_tasks.append([ms_start, ms_end])
if end > self.end_time:
self.end_time = end
e = {'t': thread,
'n': self.event_names[type], 's': start, 'e': end}
if 'callInfo' in event and 'url' in event and event['url'].startswith(
'http'):
e['js'] = event['url'].split('#', 1)[0]
elif 'data' in event and 'url' in event['data'] and \
event['data']['url'].startswith('http'):
e['js'] = event['data']['url'].split('#', 1)[0]
elif 'data' in event and 'scriptName' in event['data'] and \
event['data']['scriptName'].startswith('http'):
e['js'] = event['data']['scriptName'].split('#', 1)[0]
elif 'stackTrace' in event and event['stackTrace']:
for stack_frame in event['stackTrace']:
if 'url' in stack_frame and stack_frame['url'].startswith('http'):
e['js'] = stack_frame['url'].split('#', 1)[0]
break
# Process profile child events
if 'data' in event and 'profile' in event['data'] and 'rootNodes' in event['data']['profile']:
for child in event['data']['profile']['rootNodes']:
c = self.ProcessOldTimelineEvent(child, type, depth + 1)
if c is not None:
if 'c' not in e:
e['c'] = []
e['c'].append(c)
# recursively process any child events
if 'children' in event:
for child in event['children']:
c = self.ProcessOldTimelineEvent(child, type, depth + 1)
if c is not None:
if 'c' not in e:
e['c'] = []
e['c'].append(c)
return e
def ProcessTimelineEvents(self):
if len(self.timeline_events) and self.end_time > self.start_time:
# Figure out how big each slice should be in usecs. Size it to a
# power of 10 where we have at least 2000 slices
if self.interactive is None:
self.interactive = []
exp = 0
last_exp = 0
slice_count = self.end_time - self.start_time
while slice_count > 2000:
last_exp = exp
exp += 1
slice_count = int(
math.ceil(float(self.end_time - self.start_time) / float(pow(10, exp))))
self.cpu['total_usecs'] = self.end_time - self.start_time
self.cpu['slice_usecs'] = int(pow(10, last_exp))
slice_count = int(math.ceil(
float(self.end_time - self.start_time) / float(self.cpu['slice_usecs'])))
# Create the empty time slices for all of the threads
self.cpu['slices'] = {}
for thread in self.threads.keys():
self.cpu['slices'][thread] = {'total': [0.0] * slice_count}
for name in self.threads[thread].keys():
self.cpu['slices'][thread][name] = [0.0] * slice_count
# Go through all of the timeline events recursively and account for
# the time they consumed
for timeline_event in self.timeline_events:
self.ProcessTimelineEvent(timeline_event, None)
if self.interactive_end is not None and self.interactive_end - \
self.interactive_start > 500000:
self.interactive.append([int(math.ceil(self.interactive_start / 1000.0)),
int(math.floor(self.interactive_end / 1000.0))])
# Go through all of the fractional times and convert the float
# fractional times to integer usecs
for thread in self.cpu['slices'].keys():
del self.cpu['slices'][thread]['total']
for name in self.cpu['slices'][thread].keys():
for slice in range(len(self.cpu['slices'][thread][name])):
self.cpu['slices'][thread][name][slice] =\
int(self.cpu['slices'][thread][name]
[slice] * self.cpu['slice_usecs'])
# Pick the candidate main thread with the most activity
main_threads = list(self.cpu['main_threads'])
if len(main_threads) == 0:
main_threads = self.cpu['slices'].keys()
main_thread = None
main_thread_cpu = 0
for thread in main_threads:
try:
thread_cpu = 0
if thread in self.cpu['slices']:
for name in self.cpu['slices'][thread].keys():
for slice in range(len(self.cpu['slices'][thread][name])):
thread_cpu += self.cpu['slices'][thread][name][slice]
if main_thread is None or thread_cpu > main_thread_cpu:
main_thread = thread
main_thread_cpu = thread_cpu
except Exception:
logging.exception('Error processing thread')
if main_thread is not None:
self.cpu['main_thread'] = main_thread
def ProcessTimelineEvent(self, timeline_event, parent, stack=None):
start = timeline_event['s'] - self.start_time
end = timeline_event['e'] - self.start_time
if self.long_tasks is None:
self.long_tasks = []
self.cpu['valid'] = True
if stack is None:
stack = {}
if end > start:
elapsed = end - start
thread = timeline_event['t']
name = self.event_name_lookup[timeline_event['n']]
# Keep track of periods on the main thread where at least 500ms are
# available with no tasks longer than 50ms
if 'main_thread' in self.cpu and thread == self.cpu['main_thread']:
if elapsed > 50000:
if start - self.interactive_start > 500000:
self.interactive.append(
[int(math.ceil(self.interactive_start / 1000.0)),
int(math.floor(start / 1000.0))])
self.interactive_start = end
self.interactive_end = None
else:
self.interactive_end = end
# Keep track of the long-duration top-level tasks
if parent is None and elapsed > 50000 and thread in self.cpu['main_threads']:
# make sure this isn't contained within an existing event
ms_start = int(math.floor(start / 1000.0))
ms_end = int(math.ceil(end / 1000.0))
if not self.long_tasks:
# Empty list of long tasks
self.long_tasks.append([ms_start, ms_end])
else:
last_start = self.long_tasks[-1][0]
last_end = self.long_tasks[-1][1]
if ms_start >= last_end:
# This task is entirely after the last long task we know about
self.long_tasks.append([ms_start, ms_end])
elif ms_end > last_end:
# task extends beyond the previous end of the long tasks but overlaps
del self.long_tasks[-1]
if ms_start >= last_start:
self.long_tasks.append([last_start, ms_end])
else:
self.long_tasks.append([ms_start, ms_end])
if 'js' in timeline_event:
script = timeline_event['js']
js_start = start / 1000.0
js_end = end / 1000.0
if self.scripts is None:
self.scripts = {}
if 'main_thread' not in self.scripts and 'main_thread' in self.cpu:
self.scripts['main_thread'] = self.cpu['main_thread']
if thread not in self.scripts:
self.scripts[thread] = {}
if script not in self.scripts[thread]:
self.scripts[thread][script] = {}
if name not in self.scripts[thread][script]:
self.scripts[thread][script][name] = []
if thread not in stack:
stack[thread] = {}
if script not in stack[thread]:
stack[thread][script] = {}
if name not in stack[thread][script]:
stack[thread][script][name] = []
# make sure the script duration isn't already covered by a
# parent event
new_duration = True
if len(stack[thread][script][name]):
for period in stack[thread][script][name]:
if len(period) >= 2 and js_start >= period[0] and js_end <= period[1]:
new_duration = False
break
if new_duration:
self.scripts[thread][script][name].append([js_start, js_end])
stack[thread][script][name].append([js_start, js_end])
slice_usecs = self.cpu['slice_usecs']
first_slice = int(float(start) / float(slice_usecs))
last_slice = int(float(end) / float(slice_usecs))
for slice_number in range(first_slice, last_slice + 1):
slice_start = slice_number * slice_usecs
slice_end = slice_start + slice_usecs
used_start = max(slice_start, start)
used_end = min(slice_end, end)
slice_elapsed = used_end - used_start
self.AdjustTimelineSlice(
thread, slice_number, name, parent, slice_elapsed)
# Recursively process any child events
if 'c' in timeline_event:
for child in timeline_event['c']:
self.ProcessTimelineEvent(child, name, dict(stack))
# Add the time to the given slice and subtract the time from a parent event
def AdjustTimelineSlice(self, thread, slice_number, name, parent, elapsed):
try:
# Don't bother adjusting if both the current event and parent are the same category
# since they would just cancel each other out.
if name != parent:
fraction = min(1.0, float(elapsed) /
float(self.cpu['slice_usecs']))
self.cpu['slices'][thread][name][slice_number] += fraction
self.cpu['slices'][thread]['total'][slice_number] += fraction
if parent is not None and \
self.cpu['slices'][thread][parent][slice_number] >= fraction:
self.cpu['slices'][thread][parent][slice_number] -= fraction
self.cpu['slices'][thread]['total'][slice_number] -= fraction
# Make sure we didn't exceed 100% in this slice
self.cpu['slices'][thread][name][slice_number] = min(
1.0, self.cpu['slices'][thread][name][slice_number])
# make sure we don't exceed 100% for any slot
if self.cpu['slices'][thread]['total'][slice_number] > 1.0:
available = max(0.0, 1.0 - fraction)
for slice_name in self.cpu['slices'][thread].keys():
if slice_name != name:
self.cpu['slices'][thread][slice_name][slice_number] =\
min(self.cpu['slices'][thread]
[slice_name][slice_number], available)
available = max(0.0, available - \
self.cpu['slices'][thread][slice_name][slice_number])
self.cpu['slices'][thread]['total'][slice_number] = min(
1.0, max(0.0, 1.0 - available))
except BaseException:
logging.exception('Error adjusting timeline slice')
##########################################################################
# Blink Content Events
##########################################################################
def ProcessContentEvent(self, trace_event):
if 'name' in trace_event:
if trace_event['name'] == 'WebContentsImpl::UpdateTitle':
if 'titleTime' not in self.page_data['times']:
self.page_data['times']['titleTime'] = trace_event['ts']
##########################################################################
# Blink Features
##########################################################################
def ProcessFeatureUsageEvent(self, trace_event):
global BLINK_FEATURES
if 'name' in trace_event and\
'args' in trace_event and\
'feature' in trace_event['args'] and\
(trace_event['name'] == 'FeatureFirstUsed' or trace_event['name'] == 'CSSFirstUsed'):
if self.feature_usage is None:
self.feature_usage = {
'Features': {}, 'CSSFeatures': {}, 'AnimatedCSSFeatures': {}}
id = '{0:d}'.format(trace_event['args']['feature'])
if trace_event['name'] == 'FeatureFirstUsed':
if id in BLINK_FEATURES:
name = BLINK_FEATURES[id]
else:
name = 'Feature_{0}'.format(id)
if id not in self.feature_usage['Features']:
self.feature_usage['Features'][id] = {'name': name, 'firstUsed': []}
self.feature_usage['Features'][id]['firstUsed'].append(trace_event['ts'])
elif trace_event['name'] == 'CSSFirstUsed':
if id in CSS_FEATURES:
name = CSS_FEATURES[id]
else:
name = 'CSSFeature_{0}'.format(id)
if id not in self.feature_usage['CSSFeatures']:
self.feature_usage['CSSFeatures'][id] = {'name': name, 'firstUsed': []}
self.feature_usage['CSSFeatures'][id]['firstUsed'].append(trace_event['ts'])
elif trace_event['name'] == 'AnimatedCSSFirstUsed':
if id in CSS_FEATURES:
name = CSS_FEATURES[id]
else:
name = 'CSSFeature_{0}'.format(id)
if id not in self.feature_usage['AnimatedCSSFeatures']:
self.feature_usage['AnimatedCSSFeatures'][id] = {'name': name, 'firstUsed': []}
self.feature_usage['AnimatedCSSFeatures'][id]['firstUsed'].append(trace_event['ts'])
def post_process_feature_usage(self):
out = None
if self.feature_usage is not None and self.start_time is not None:
out = {}
for category in self.feature_usage:
out[category] = {}
for id in self.feature_usage[category]:
feature_time = None
for ts in self.feature_usage[category][id]['firstUsed']:
timestamp = float('{0:0.3f}'.format((ts - self.start_time) / 1000.0))
if timestamp > 0:
if feature_time is None or timestamp < feature_time:
feature_time = timestamp
if feature_time is not None:
out[category][id] = {'name': self.feature_usage[category][id]['name'], 'firstUsed': feature_time}
return out
##########################################################################
# Netlog
##########################################################################
def ProcessNetlogEvent(self, trace_event):
if 'args' in trace_event and 'id' in trace_event and 'name' in trace_event:
try:
if isinstance(trace_event['id'], (str, unicode)):
trace_event['id'] = int(trace_event['id'], 16)
event_type = None
name = trace_event['name']
if 'source_type' in trace_event['args']:
event_type = trace_event['args']['source_type']
if name not in self.netlog_event_types:
self.netlog_event_types[name] = event_type
elif name in self.netlog_event_types:
event_type = self.netlog_event_types[name]
if event_type is not None:
if event_type == 'HOST_RESOLVER_IMPL_JOB' or \
trace_event['name'].startswith('HOST_RESOLVER'):
self.ProcessNetlogDnsEvent(trace_event)
elif event_type == 'CONNECT_JOB' or \
event_type == 'SSL_CONNECT_JOB' or \
event_type == 'TRANSPORT_CONNECT_JOB':
self.ProcessNetlogConnectJobEvent(trace_event)
elif event_type == 'HTTP_STREAM_JOB':
self.ProcessNetlogStreamJobEvent(trace_event)
elif event_type == 'HTTP2_SESSION':
self.ProcessNetlogHttp2SessionEvent(trace_event)
elif event_type == 'QUIC_SESSION':
self.ProcessNetlogQuicSessionEvent(trace_event)
elif event_type == 'SOCKET':
self.ProcessNetlogSocketEvent(trace_event)
elif event_type == 'UDP_SOCKET':
self.ProcessNetlogUdpSocketEvent(trace_event)
elif event_type == 'URL_REQUEST':
self.ProcessNetlogUrlRequestEvent(trace_event)
elif event_type == 'DISK_CACHE_ENTRY':
self.ProcessNetlogDiskCacheEvent(trace_event)
except Exception:
logging.exception('Error processing netlog event')
def post_process_netlog_events(self):
"""Post-process the raw netlog events into request data"""
if self.netlog_requests is not None:
return self.netlog_requests
requests = []
known_hosts = ['cache.pack.google.com', 'clients1.google.com', 'redirector.gvt1.com']
last_time = 0