tools/perf/perf_tools/cheapness_predictor_benchmark.py

   1 # Copyright (c) 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 from perf_tools import cheapness_predictor_measurement
   5 from telemetry.page import page_benchmark
   6
   7 PREDICTOR_STATS = [
   8   {'name': 'picture_pile_count', 'units': ''},
   9   {'name': 'predictor_accuracy', 'units': 'percent'},
  10   {'name': 'predictor_safely_wrong_count', 'units': ''},
  11   {'name': 'predictor_badly_wrong_count', 'units': ''}]
  12
  13 class CheapnessPredictorBenchmark(page_benchmark.PageBenchmark):
  14   def __init__(self):
  15     super(CheapnessPredictorBenchmark, self).__init__('smoothness')
  16     self._measurement = None
  17
  18   def CustomizeBrowserOptions(self, options):
  19     options.AppendExtraBrowserArg('--dom-automation')
  20     options.AppendExtraBrowserArg('--enable-prediction-benchmarking')
  21     options.AppendExtraBrowserArg('--enable-gpu-benchmarking')
  22     options.AppendExtraBrowserArg('--enable-threaded-compositing')
  23     options.AppendExtraBrowserArg('--enable-impl-side-painting')
  24
  25   def DidNavigateToPage(self, page, tab):
  26     self._measurement = \
  27       cheapness_predictor_measurement.CheapnessPredictorMeasurement(tab)
  28     self._measurement.GatherInitialStats()
  29
  30   def DidRunAction(self, page, tab, action):
  31     self._measurement.GatherDeltaStats()
  32
  33   def CanRunForPage(self, page):
  34     return hasattr(page, 'smoothness')
  35
  36   def MeasurePage(self, page, tab, results):
  37     predictor_stats = self._measurement.stats
  38
  39     for stat_to_gather in PREDICTOR_STATS:
  40       results.Add(stat_to_gather['name'],
  41                   stat_to_gather['units'],
  42                   predictor_stats[stat_to_gather['name']])