tools/perf/measurements/media.py

   1 # Copyright 2013 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
   5 from metrics import cpu
   6 from metrics import media
   7 from metrics import system_memory
   8 from metrics import power
   9 from telemetry.page import page_test
  10
  11
  12 class Media(page_test.PageTest):
  13   """The MediaMeasurement class gathers media-related metrics on a page set.
  14
  15   Media metrics recorded are controlled by metrics/media.js.  At the end of the
  16   test each metric for every media element in the page are reported.
  17   """
  18
  19   def __init__(self):
  20     super(Media, self).__init__('RunPageInteractions')
  21     self._media_metric = None
  22     # Used to add browser power and CPU metrics to results per test.
  23     self._add_browser_metrics = False
  24     self._cpu_metric = None
  25     self._memory_metric = None
  26     self._power_metric = None
  27
  28   def WillStartBrowser(self, platform):
  29     self._power_metric = power.PowerMetric(platform)
  30
  31   def CustomizeBrowserOptions(self, options):
  32     # Needed to run media actions in JS on touch-based devices as on Android.
  33     options.AppendExtraBrowserArgs(
  34         '--disable-gesture-requirement-for-media-playback')
  35     power.PowerMetric.CustomizeBrowserOptions(options)
  36
  37   def DidNavigateToPage(self, page, tab):
  38     """Override to do operations right after the page is navigated."""
  39     self._media_metric = media.MediaMetric(tab)
  40     self._media_metric.Start(page, tab)
  41
  42     # Reset to false for every page.
  43     self._add_browser_metrics = (page.add_browser_metrics
  44         if hasattr(page, 'add_browser_metrics') else False)
  45
  46     if self._add_browser_metrics:
  47       self._cpu_metric = cpu.CpuMetric(tab.browser)
  48       self._cpu_metric.Start(page, tab)
  49       self._memory_metric = system_memory.SystemMemoryMetric(tab.browser)
  50       self._memory_metric.Start(page, tab)
  51       self._power_metric.Start(page, tab)
  52
  53   def ValidateAndMeasurePage(self, page, tab, results):
  54     """Measure the page's performance."""
  55     self._media_metric.Stop(page, tab)
  56     trace_name = self._media_metric.AddResults(tab, results)
  57
  58     if self._add_browser_metrics:
  59       self._cpu_metric.Stop(page, tab)
  60       self._memory_metric.Stop(page, tab)
  61       self._power_metric.Stop(page, tab)
  62       self._cpu_metric.AddResults(tab, results, trace_name=trace_name)
  63       exclude_metrics = ['WorkingSetSizePeak', 'SystemCommitCharge', 'VMPeak',
  64                          'VM']
  65       self._memory_metric.AddResults(tab, results,
  66                                      trace_name=trace_name,
  67                                      exclude_metrics=exclude_metrics)
  68       self._power_metric.AddResults(tab, results)