tools/perf/metrics/io.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 Metric
   6
   7 class IOMetric(Metric):
   8   """IO-related metrics, obtained via telemetry.core.Browser."""
   9
  10   @classmethod
  11   def CustomizeBrowserOptions(cls, options):
  12     options.AppendExtraBrowserArgs('--no-sandbox')
  13
  14   def Start(self, page, tab):
  15     raise NotImplementedError()
  16
  17   def Stop(self, page, tab):
  18     raise NotImplementedError()
  19
  20   def AddResults(self, tab, results):
  21     # This metric currently only returns summary results, not per-page results.
  22     raise NotImplementedError()
  23
  24   def AddSummaryResults(self, browser, results):
  25     """Add summary results to the results object."""
  26     io_stats = browser.io_stats
  27     if not io_stats['Browser']:
  28       return
  29
  30     def AddSummariesForProcessType(process_type_io, process_type_trace):
  31       """For a given process type, add all relevant summary results.
  32
  33       Args:
  34         process_type_io: Type of process (eg Browser or Renderer).
  35         process_type_trace: String to be added to the trace name in the results.
  36       """
  37       if 'ReadOperationCount' in io_stats[process_type_io]:
  38         results.AddSummary('read_operations_' + process_type_trace, 'count',
  39                            io_stats[process_type_io]
  40                            ['ReadOperationCount'],
  41                            data_type='unimportant')
  42       if 'WriteOperationCount' in io_stats[process_type_io]:
  43         results.AddSummary('write_operations_' + process_type_trace, 'count',
  44                            io_stats[process_type_io]
  45                            ['WriteOperationCount'],
  46                            data_type='unimportant')
  47       if 'ReadTransferCount' in io_stats[process_type_io]:
  48         results.AddSummary('read_bytes_' + process_type_trace, 'kb',
  49                            io_stats[process_type_io]
  50                            ['ReadTransferCount'] / 1024,
  51                            data_type='unimportant')
  52       if 'WriteTransferCount' in io_stats[process_type_io]:
  53         results.AddSummary('write_bytes_' + process_type_trace, 'kb',
  54                            io_stats[process_type_io]
  55                            ['WriteTransferCount'] / 1024,
  56                            data_type='unimportant')
  57
  58     AddSummariesForProcessType('Browser', 'browser')
  59     AddSummariesForProcessType('Renderer', 'renderer')
  60     AddSummariesForProcessType('Gpu', 'gpu')
  61