src/tools/perf/measurements/timeline_controller.py

   1 # Copyright 2014 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4 from measurements import smooth_gesture_util
   5
   6 from telemetry.core.platform import tracing_category_filter
   7 from telemetry.core.platform import tracing_options
   8 from telemetry.timeline.model import TimelineModel
   9 from telemetry.page.actions import action_runner
  10 from telemetry.web_perf import timeline_interaction_record as tir_module
  11
  12
  13 RUN_SMOOTH_ACTIONS = 'RunSmoothAllActions'
  14
  15
  16 class TimelineController(object):
  17   def __init__(self):
  18     super(TimelineController, self).__init__()
  19     self.trace_categories = None
  20     self._model = None
  21     self._renderer_process = None
  22     self._smooth_records = []
  23     self._interaction = None
  24
  25   def SetUp(self, page, tab):
  26     """Starts gathering timeline data.
  27
  28     """
  29     # Resets these member variables incase this object is reused.
  30     self._model = None
  31     self._renderer_process = None
  32     if not tab.browser.platform.tracing_controller.IsChromeTracingSupported(
  33       tab.browser):
  34       raise Exception('Not supported')
  35     category_filter = tracing_category_filter.TracingCategoryFilter(
  36         filter_string=self.trace_categories)
  37     for delay in page.GetSyntheticDelayCategories():
  38       category_filter.AddSyntheticDelay(delay)
  39     options = tracing_options.TracingOptions()
  40     options.enable_chrome_trace = True
  41     tab.browser.platform.tracing_controller.Start(options, category_filter)
  42
  43   def Start(self, tab):
  44     # Start the smooth marker for all actions.
  45     runner = action_runner.ActionRunner(tab)
  46     self._interaction = runner.BeginInteraction(
  47         RUN_SMOOTH_ACTIONS, is_smooth=True)
  48
  49   def Stop(self, tab):
  50     # End the smooth marker for all actions.
  51     self._interaction.End()
  52     # Stop tracing.
  53     timeline_data = tab.browser.platform.tracing_controller.Stop()
  54     self._model = TimelineModel(timeline_data)
  55     self._renderer_process = self._model.GetRendererProcessFromTabId(tab.id)
  56     renderer_thread = self.model.GetRendererThreadFromTabId(tab.id)
  57
  58     run_smooth_actions_record = None
  59     self._smooth_records = []
  60     for event in renderer_thread.async_slices:
  61       if not tir_module.IsTimelineInteractionRecord(event.name):
  62         continue
  63       r = tir_module.TimelineInteractionRecord.FromAsyncEvent(event)
  64       if r.label == RUN_SMOOTH_ACTIONS:
  65         assert run_smooth_actions_record is None, (
  66           'TimelineController cannot issue more than 1 %s record' %
  67           RUN_SMOOTH_ACTIONS)
  68         run_smooth_actions_record = r
  69       elif r.is_smooth:
  70         self._smooth_records.append(
  71           smooth_gesture_util.GetAdjustedInteractionIfContainGesture(
  72             self.model, r))
  73
  74     # If there is no other smooth records, we make measurements on time range
  75     # marked by timeline_controller itself.
  76     # TODO(nednguyen): when crbug.com/239179 is marked fixed, makes sure that
  77     # page sets are responsible for issueing the markers themselves.
  78     if len(self._smooth_records) == 0 and run_smooth_actions_record:
  79       self._smooth_records = [run_smooth_actions_record]
  80
  81
  82   def CleanUp(self, tab):
  83     if tab.browser.platform.tracing_controller.is_tracing_running:
  84       tab.browser.platform.tracing_controller.Stop()
  85
  86   @property
  87   def model(self):
  88     return self._model
  89
  90   @property
  91   def renderer_process(self):
  92     return self._renderer_process
  93
  94   @property
  95   def smooth_records(self):
  96     return self._smooth_records