tools/run-bisect-perf-regression.py - chromium/chromium - Git at Google

 #!/usr/bin/env python
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

 """Run Performance Test Bisect Tool

 This script is used by a trybot to run the src/tools/bisect-perf-regression.py
 script with the parameters specified in run-bisect-perf-regression.cfg. It will
 check out a copy of the depot in a subdirectory 'bisect' of the working
 directory provided, and run the bisect-perf-regression.py script there.

 """

 import imp
 import optparse
 import os
 import platform
 import subprocess
 import sys
 import traceback

 from auto_bisect import bisect_utils

 bisect = imp.load_source('bisect-perf-regression',
     os.path.join(os.path.abspath(os.path.dirname(sys.argv[0])),
         'bisect-perf-regression.py'))


 CROS_BOARD_ENV = 'BISECT_CROS_BOARD'
 CROS_IP_ENV = 'BISECT_CROS_IP'


 class Goma(object):

   def __init__(self, path_to_goma):
     self._abs_path_to_goma = None
     self._abs_path_to_goma_file = None
     if path_to_goma:
       self._abs_path_to_goma = os.path.abspath(path_to_goma)
       self._abs_path_to_goma_file = self._GetExecutablePath(
           self._abs_path_to_goma)

   def __enter__(self):
     if self._HasGOMAPath():
       self._SetupAndStart()
     return self

   def __exit__(self, *_):
     if self._HasGOMAPath():
       self._Stop()

   def _HasGOMAPath(self):
     return bool(self._abs_path_to_goma)

   def _GetExecutablePath(self, path_to_goma):
     if os.name == 'nt':
       return os.path.join(path_to_goma, 'goma_ctl.bat')
     else:
       return os.path.join(path_to_goma, 'goma_ctl.sh')

   def _SetupEnvVars(self):
     if os.name == 'nt':
       os.environ['CC'] = (os.path.join(self._abs_path_to_goma, 'gomacc.exe') +
           ' cl.exe')
       os.environ['CXX'] = (os.path.join(self._abs_path_to_goma, 'gomacc.exe') +
           ' cl.exe')
     else:
       os.environ['PATH'] = os.pathsep.join([self._abs_path_to_goma,
           os.environ['PATH']])

   def _SetupAndStart(self):
     """Sets up GOMA and launches it.

     Args:
       path_to_goma: Path to goma directory.

     Returns:
       True if successful."""
     self._SetupEnvVars()

     # Sometimes goma is lingering around if something went bad on a previous
     # run. Stop it before starting a new process. Can ignore the return code
     # since it will return an error if it wasn't running.
     self._Stop()

     if subprocess.call([self._abs_path_to_goma_file, 'start']):
       raise RuntimeError('GOMA failed to start.')

   def _Stop(self):
     subprocess.call([self._abs_path_to_goma_file, 'stop'])


 def _LoadConfigFile(path_to_file):
   """Attempts to load the specified config file as a module
   and grab the global config dict.

   Args:
     path_to_file: Path to the file.

   Returns:
     The config dict which should be formatted as follows:
     {'command': string, 'good_revision': string, 'bad_revision': string
      'metric': string, etc...}.
     Returns None on failure.
   """
   try:
     local_vars = {}
     execfile(path_to_file, local_vars)

     return local_vars['config']
   except:
     print
     traceback.print_exc()
     print
     return {}


 def _ValidateConfigFile(config_contents, valid_parameters):
   """Validates the config file contents, checking whether all values are
   non-empty.

   Args:
     config_contents: Contents of the config file passed from _LoadConfigFile.
     valid_parameters: A list of parameters to check for.

   Returns:
     True if valid.
   """
   try:
     [config_contents[current_parameter]
         for current_parameter in valid_parameters]
     config_has_values = [v and type(v) is str
         for v in config_contents.values() if v]
     return config_has_values
   except KeyError:
     return False


 def _ValidatePerfConfigFile(config_contents):
   """Validates that the perf config file contents. This is used when we're
   doing a perf try job, rather than a bisect. The file is called
   run-perf-test.cfg by default.

   The parameters checked are the required parameters; any additional optional
   parameters won't be checked and validation will still pass.

   Args:
     config_contents: Contents of the config file passed from _LoadConfigFile.

   Returns:
     True if valid.
   """
   valid_parameters = ['command', 'metric', 'repeat_count', 'truncate_percent',
       'max_time_minutes']
   return _ValidateConfigFile(config_contents, valid_parameters)


 def _ValidateBisectConfigFile(config_contents):
   """Validates that the bisect config file contents. The parameters checked are
   the required parameters; any additional optional parameters won't be checked
   and validation will still pass.

   Args:
     config_contents: Contents of the config file passed from _LoadConfigFile.

   Returns:
     True if valid.
   """
   valid_params = ['command', 'good_revision', 'bad_revision', 'metric',
       'repeat_count', 'truncate_percent', 'max_time_minutes']
   return _ValidateConfigFile(config_contents, valid_params)


 def _OutputFailedResults(text_to_print):
   bisect_utils.OutputAnnotationStepStart('Results - Failed')
   print
   print text_to_print
   print
   bisect_utils.OutputAnnotationStepClosed()


 def _CreateBisectOptionsFromConfig(config):
   print config['command']
   opts_dict = {}
   opts_dict['command'] = config['command']
   opts_dict['metric'] = config['metric']

   if config['repeat_count']:
     opts_dict['repeat_test_count'] = int(config['repeat_count'])

   if config['truncate_percent']:
     opts_dict['truncate_percent'] = int(config['truncate_percent'])

   if config['max_time_minutes']:
     opts_dict['max_time_minutes'] = int(config['max_time_minutes'])

   if config.has_key('use_goma'):
     opts_dict['use_goma'] = config['use_goma']
   if config.has_key('goma_dir'):
     opts_dict['goma_dir'] = config['goma_dir']

   opts_dict['build_preference'] = 'ninja'
   opts_dict['output_buildbot_annotations'] = True

   if '--browser=cros' in config['command']:
     opts_dict['target_platform'] = 'cros'

     if os.environ[CROS_BOARD_ENV] and os.environ[CROS_IP_ENV]:
       opts_dict['cros_board'] = os.environ[CROS_BOARD_ENV]
       opts_dict['cros_remote_ip'] = os.environ[CROS_IP_ENV]
     else:
       raise RuntimeError('Cros build selected, but BISECT_CROS_IP or'
           'BISECT_CROS_BOARD undefined.')
   elif 'android' in config['command']:
     if 'android-chrome-shell' in config['command']:
       opts_dict['target_platform'] = 'android'
     elif 'android-chrome' in config['command']:
       opts_dict['target_platform'] = 'android-chrome'
     else:
       opts_dict['target_platform'] = 'android'

   return bisect.BisectOptions.FromDict(opts_dict)


 def _RunPerformanceTest(config, path_to_file):
   # Bisect script expects to be run from src
   os.chdir(os.path.join(path_to_file, '..'))

   bisect_utils.OutputAnnotationStepStart('Building With Patch')

   opts = _CreateBisectOptionsFromConfig(config)
   b = bisect.BisectPerformanceMetrics(None, opts)

   if bisect_utils.RunGClient(['runhooks']):
     raise RuntimeError('Failed to run gclient runhooks')

   if not b.BuildCurrentRevision('chromium'):
     raise RuntimeError('Patched version failed to build.')

   bisect_utils.OutputAnnotationStepClosed()
   bisect_utils.OutputAnnotationStepStart('Running With Patch')

   results_with_patch = b.RunPerformanceTestAndParseResults(
       opts.command, opts.metric, reset_on_first_run=True, results_label='Patch')

   if results_with_patch[1]:
     raise RuntimeError('Patched version failed to run performance test.')

   bisect_utils.OutputAnnotationStepClosed()

   bisect_utils.OutputAnnotationStepStart('Reverting Patch')
   if bisect_utils.RunGClient(['revert']):
     raise RuntimeError('Failed to run gclient runhooks')
   bisect_utils.OutputAnnotationStepClosed()

   bisect_utils.OutputAnnotationStepStart('Building Without Patch')

   if bisect_utils.RunGClient(['runhooks']):
     raise RuntimeError('Failed to run gclient runhooks')

   if not b.BuildCurrentRevision('chromium'):
     raise RuntimeError('Unpatched version failed to build.')

   bisect_utils.OutputAnnotationStepClosed()
   bisect_utils.OutputAnnotationStepStart('Running Without Patch')

   results_without_patch = b.RunPerformanceTestAndParseResults(
       opts.command, opts.metric, upload_on_last_run=True, results_label='ToT')

   if results_without_patch[1]:
     raise RuntimeError('Unpatched version failed to run performance test.')

   # Find the link to the cloud stored results file.
   output = results_without_patch[2]
   cloud_file_link = [t for t in output.splitlines()
       if 'storage.googleapis.com/chromium-telemetry/html-results/' in t]
   if cloud_file_link:
     # What we're getting here is basically "View online at http://..." so parse
     # out just the url portion.
     cloud_file_link = cloud_file_link[0]
     cloud_file_link = [t for t in cloud_file_link.split(' ')
         if 'storage.googleapis.com/chromium-telemetry/html-results/' in t]
     assert cloud_file_link, "Couldn't parse url from output."
     cloud_file_link = cloud_file_link[0]
   else:
     cloud_file_link = ''

   # Calculate the % difference in the means of the 2 runs.
   percent_diff_in_means = (results_with_patch[0]['mean'] /
       max(0.0001, results_without_patch[0]['mean'])) * 100.0 - 100.0
   std_err = bisect.CalculatePooledStandardError(
       [results_with_patch[0]['values'], results_without_patch[0]['values']])

   bisect_utils.OutputAnnotationStepClosed()
   bisect_utils.OutputAnnotationStepStart('Results - %.02f +- %0.02f delta' %
       (percent_diff_in_means, std_err))
   print ' %s %s %s' % (''.center(10, ' '), 'Mean'.center(20, ' '),
       'Std. Error'.center(20, ' '))
   print ' %s %s %s' % ('Patch'.center(10, ' '),
       ('%.02f' % results_with_patch[0]['mean']).center(20, ' '),
       ('%.02f' % results_with_patch[0]['std_err']).center(20, ' '))
   print ' %s %s %s' % ('No Patch'.center(10, ' '),
       ('%.02f' % results_without_patch[0]['mean']).center(20, ' '),
       ('%.02f' % results_without_patch[0]['std_err']).center(20, ' '))
   if cloud_file_link:
     bisect_utils.OutputAnnotationStepLink('HTML Results', cloud_file_link)
   bisect_utils.OutputAnnotationStepClosed()


 def _SetupAndRunPerformanceTest(config, path_to_file, path_to_goma):
   """Attempts to build and run the current revision with and without the
   current patch, with the parameters passed in.

   Args:
     config: The config read from run-perf-test.cfg.
     path_to_file: Path to the bisect-perf-regression.py script.
     path_to_goma: Path to goma directory.

   Returns:
     0 on success, otherwise 1.
   """
   try:
     with Goma(path_to_goma) as goma:
       config['use_goma'] = bool(path_to_goma)
       config['goma_dir'] = os.path.abspath(path_to_goma)
       _RunPerformanceTest(config, path_to_file)
     return 0
   except RuntimeError, e:
     bisect_utils.OutputAnnotationStepClosed()
     _OutputFailedResults('Error: %s' % e.message)
     return 1


 def _RunBisectionScript(config, working_directory, path_to_file, path_to_goma,
     path_to_extra_src, dry_run):
   """Attempts to execute src/tools/bisect-perf-regression.py with the parameters
   passed in.

   Args:
     config: A dict containing the parameters to pass to the script.
     working_directory: A working directory to provide to the
       bisect-perf-regression.py script, where it will store it's own copy of
       the depot.
     path_to_file: Path to the bisect-perf-regression.py script.
     path_to_goma: Path to goma directory.
     path_to_extra_src: Path to extra source file.
     dry_run: Do a dry run, skipping sync, build, and performance testing steps.

   Returns:
     0 on success, otherwise 1.
   """
   bisect_utils.OutputAnnotationStepStart('Config')
   print
   for k, v in config.iteritems():
     print '  %s : %s' % (k, v)
   print
   bisect_utils.OutputAnnotationStepClosed()

   cmd = ['python', os.path.join(path_to_file, 'bisect-perf-regression.py'),
          '-c', config['command'],
          '-g', config['good_revision'],
          '-b', config['bad_revision'],
          '-m', config['metric'],
          '--working_directory', working_directory,
          '--output_buildbot_annotations']

   if config['repeat_count']:
     cmd.extend(['-r', config['repeat_count']])

   if config['truncate_percent']:
     cmd.extend(['-t', config['truncate_percent']])

   if config['max_time_minutes']:
     cmd.extend(['--max_time_minutes', config['max_time_minutes']])

   if config.has_key('bisect_mode'):
     cmd.extend(['--bisect_mode', config['bisect_mode']])

   cmd.extend(['--build_preference', 'ninja'])

   if '--browser=cros' in config['command']:
     cmd.extend(['--target_platform', 'cros'])

     if os.environ[CROS_BOARD_ENV] and os.environ[CROS_IP_ENV]:
       cmd.extend(['--cros_board', os.environ[CROS_BOARD_ENV]])
       cmd.extend(['--cros_remote_ip', os.environ[CROS_IP_ENV]])
     else:
       print 'Error: Cros build selected, but BISECT_CROS_IP or'\
             'BISECT_CROS_BOARD undefined.'
       print
       return 1

   if 'android' in config['command']:
     if 'android-chrome-shell' in config['command']:
       cmd.extend(['--target_platform', 'android'])
     elif 'android-chrome' in config['command']:
       cmd.extend(['--target_platform', 'android-chrome'])
     else:
       cmd.extend(['--target_platform', 'android'])

   if path_to_goma:
     # crbug.com/330900. For Windows XP platforms, GOMA service is not supported.
     # Moreover we don't compile chrome when gs_bucket flag is set instead
     # use builds archives, therefore ignore GOMA service for Windows XP.
     if config.get('gs_bucket') and platform.release() == 'XP':
       print ('Goma doesn\'t have a win32 binary, therefore it is not supported '
              'on Windows XP platform. Please refer to crbug.com/330900.')
       path_to_goma = None
     cmd.append('--use_goma')

   if path_to_extra_src:
     cmd.extend(['--extra_src', path_to_extra_src])

   # These flags are used to download build archives from cloud storage if
   # available, otherwise will post a try_job_http request to build it on
   # tryserver.
   if config.get('gs_bucket'):
     if config.get('builder_host') and config.get('builder_port'):
       cmd.extend(['--gs_bucket', config['gs_bucket'],
                   '--builder_host', config['builder_host'],
                   '--builder_port', config['builder_port']
                  ])
     else:
       print ('Error: Specified gs_bucket, but missing builder_host or '
              'builder_port information in config.')
       return 1

   if dry_run:
     cmd.extend(['--debug_ignore_build', '--debug_ignore_sync',
         '--debug_ignore_perf_test'])
   cmd = [str(c) for c in cmd]

   with Goma(path_to_goma) as goma:
     return_code = subprocess.call(cmd)

   if return_code:
     print 'Error: bisect-perf-regression.py returned with error %d' %\
         return_code
     print

   return return_code


 def main():

   usage = ('%prog [options] [-- chromium-options]\n'
            'Used by a trybot to run the bisection script using the parameters'
            ' provided in the run-bisect-perf-regression.cfg file.')

   parser = optparse.OptionParser(usage=usage)
   parser.add_option('-w', '--working_directory',
                     type='str',
                     help='A working directory to supply to the bisection '
                     'script, which will use it as the location to checkout '
                     'a copy of the chromium depot.')
   parser.add_option('-p', '--path_to_goma',
                     type='str',
                     help='Path to goma directory. If this is supplied, goma '
                     'builds will be enabled.')
   parser.add_option('--path_to_config',
                     type='str',
                     help='Path to the config file to use. If this is supplied, '
                     'the bisect script will use this to override the default '
                     'config file path. The script will attempt to load it '
                     'as a bisect config first, then a perf config.')
   parser.add_option('--extra_src',
                     type='str',
                     help='Path to extra source file. If this is supplied, '
                     'bisect script will use this to override default behavior.')
   parser.add_option('--dry_run',
                     action="store_true",
                     help='The script will perform the full bisect, but '
                     'without syncing, building, or running the performance '
                     'tests.')
   (opts, args) = parser.parse_args()

   path_to_current_directory = os.path.abspath(os.path.dirname(sys.argv[0]))

   # If they've specified their own config file, use that instead.
   if opts.path_to_config:
     path_to_bisect_cfg = opts.path_to_config
   else:
     path_to_bisect_cfg = os.path.join(path_to_current_directory,
         'run-bisect-perf-regression.cfg')

   config = _LoadConfigFile(path_to_bisect_cfg)

   # Check if the config is valid.
   config_is_valid = _ValidateBisectConfigFile(config)

   if config and config_is_valid:
     if not opts.working_directory:
       print 'Error: missing required parameter: --working_directory'
       print
       parser.print_help()
       return 1

     return _RunBisectionScript(config, opts.working_directory,
         path_to_current_directory, opts.path_to_goma, opts.extra_src,
         opts.dry_run)
   else:
     perf_cfg_files = ['run-perf-test.cfg', os.path.join('..', 'third_party',
         'WebKit', 'Tools', 'run-perf-test.cfg')]

     for current_perf_cfg_file in perf_cfg_files:
       if opts.path_to_config:
         path_to_perf_cfg = opts.path_to_config
       else:
         path_to_perf_cfg = os.path.join(
             os.path.abspath(os.path.dirname(sys.argv[0])),
             current_perf_cfg_file)

       config = _LoadConfigFile(path_to_perf_cfg)
       config_is_valid = _ValidatePerfConfigFile(config)

       if config and config_is_valid:
         return _SetupAndRunPerformanceTest(config, path_to_current_directory,
             opts.path_to_goma)

     print 'Error: Could not load config file. Double check your changes to '\
           'run-bisect-perf-regression.cfg/run-perf-test.cfg for syntax errors.'
     print
     return 1


 if __name__ == '__main__':
   sys.exit(main())
	#!/usr/bin/env python
	# Copyright (c) 2013 The Chromium Authors. All rights reserved.
	# Use of this source code is governed by a BSD-style license that can be
	# found in the LICENSE file.

	"""Run Performance Test Bisect Tool

	This script is used by a trybot to run the src/tools/bisect-perf-regression.py
	script with the parameters specified in run-bisect-perf-regression.cfg. It will
	check out a copy of the depot in a subdirectory 'bisect' of the working
	directory provided, and run the bisect-perf-regression.py script there.

	"""

	import imp
	import optparse
	import os
	import platform
	import subprocess
	import sys
	import traceback

	from auto_bisect import bisect_utils

	bisect = imp.load_source('bisect-perf-regression',
	os.path.join(os.path.abspath(os.path.dirname(sys.argv[0])),
	'bisect-perf-regression.py'))


	CROS_BOARD_ENV = 'BISECT_CROS_BOARD'
	CROS_IP_ENV = 'BISECT_CROS_IP'


	class Goma(object):

	def __init__(self, path_to_goma):
	self._abs_path_to_goma = None
	self._abs_path_to_goma_file = None
	if path_to_goma:
	self._abs_path_to_goma = os.path.abspath(path_to_goma)
	self._abs_path_to_goma_file = self._GetExecutablePath(
	self._abs_path_to_goma)

	def __enter__(self):
	if self._HasGOMAPath():
	self._SetupAndStart()
	return self

	def __exit__(self, *_):
	if self._HasGOMAPath():
	self._Stop()

	def _HasGOMAPath(self):
	return bool(self._abs_path_to_goma)

	def _GetExecutablePath(self, path_to_goma):
	if os.name == 'nt':
	return os.path.join(path_to_goma, 'goma_ctl.bat')
	else:
	return os.path.join(path_to_goma, 'goma_ctl.sh')

	def _SetupEnvVars(self):
	if os.name == 'nt':
	os.environ['CC'] = (os.path.join(self._abs_path_to_goma, 'gomacc.exe') +
	' cl.exe')
	os.environ['CXX'] = (os.path.join(self._abs_path_to_goma, 'gomacc.exe') +
	' cl.exe')
	else:
	os.environ['PATH'] = os.pathsep.join([self._abs_path_to_goma,
	os.environ['PATH']])

	def _SetupAndStart(self):
	"""Sets up GOMA and launches it.

	Args:
	path_to_goma: Path to goma directory.

	Returns:
	True if successful."""
	self._SetupEnvVars()

	# Sometimes goma is lingering around if something went bad on a previous
	# run. Stop it before starting a new process. Can ignore the return code
	# since it will return an error if it wasn't running.
	self._Stop()

	if subprocess.call([self._abs_path_to_goma_file, 'start']):
	raise RuntimeError('GOMA failed to start.')

	def _Stop(self):
	subprocess.call([self._abs_path_to_goma_file, 'stop'])



	def _LoadConfigFile(path_to_file):
	"""Attempts to load the specified config file as a module
	and grab the global config dict.

	Args:
	path_to_file: Path to the file.

	Returns:
	The config dict which should be formatted as follows:
	{'command': string, 'good_revision': string, 'bad_revision': string
	'metric': string, etc...}.
	Returns None on failure.
	"""
	try:
	local_vars = {}
	execfile(path_to_file, local_vars)

	return local_vars['config']
	except:
	print
	traceback.print_exc()
	print
	return {}


	def _ValidateConfigFile(config_contents, valid_parameters):
	"""Validates the config file contents, checking whether all values are
	non-empty.

	Args:
	config_contents: Contents of the config file passed from _LoadConfigFile.
	valid_parameters: A list of parameters to check for.

	Returns:
	True if valid.
	"""
	try:
	[config_contents[current_parameter]
	for current_parameter in valid_parameters]
	config_has_values = [v and type(v) is str
	for v in config_contents.values() if v]
	return config_has_values
	except KeyError:
	return False


	def _ValidatePerfConfigFile(config_contents):
	"""Validates that the perf config file contents. This is used when we're
	doing a perf try job, rather than a bisect. The file is called
	run-perf-test.cfg by default.

	The parameters checked are the required parameters; any additional optional
	parameters won't be checked and validation will still pass.

	Args:
	config_contents: Contents of the config file passed from _LoadConfigFile.

	Returns:
	True if valid.
	"""
	valid_parameters = ['command', 'metric', 'repeat_count', 'truncate_percent',
	'max_time_minutes']
	return _ValidateConfigFile(config_contents, valid_parameters)


	def _ValidateBisectConfigFile(config_contents):
	"""Validates that the bisect config file contents. The parameters checked are
	the required parameters; any additional optional parameters won't be checked
	and validation will still pass.

	Args:
	config_contents: Contents of the config file passed from _LoadConfigFile.

	Returns:
	True if valid.
	"""
	valid_params = ['command', 'good_revision', 'bad_revision', 'metric',
	'repeat_count', 'truncate_percent', 'max_time_minutes']
	return _ValidateConfigFile(config_contents, valid_params)


	def _OutputFailedResults(text_to_print):
	bisect_utils.OutputAnnotationStepStart('Results - Failed')
	print
	print text_to_print
	print
	bisect_utils.OutputAnnotationStepClosed()


	def _CreateBisectOptionsFromConfig(config):
	print config['command']
	opts_dict = {}
	opts_dict['command'] = config['command']
	opts_dict['metric'] = config['metric']

	if config['repeat_count']:
	opts_dict['repeat_test_count'] = int(config['repeat_count'])

	if config['truncate_percent']:
	opts_dict['truncate_percent'] = int(config['truncate_percent'])

	if config['max_time_minutes']:
	opts_dict['max_time_minutes'] = int(config['max_time_minutes'])

	if config.has_key('use_goma'):
	opts_dict['use_goma'] = config['use_goma']
	if config.has_key('goma_dir'):
	opts_dict['goma_dir'] = config['goma_dir']

	opts_dict['build_preference'] = 'ninja'
	opts_dict['output_buildbot_annotations'] = True

	if '--browser=cros' in config['command']:
	opts_dict['target_platform'] = 'cros'

	if os.environ[CROS_BOARD_ENV] and os.environ[CROS_IP_ENV]:
	opts_dict['cros_board'] = os.environ[CROS_BOARD_ENV]
	opts_dict['cros_remote_ip'] = os.environ[CROS_IP_ENV]
	else:
	raise RuntimeError('Cros build selected, but BISECT_CROS_IP or'
	'BISECT_CROS_BOARD undefined.')
	elif 'android' in config['command']:
	if 'android-chrome-shell' in config['command']:
	opts_dict['target_platform'] = 'android'
	elif 'android-chrome' in config['command']:
	opts_dict['target_platform'] = 'android-chrome'
	else:
	opts_dict['target_platform'] = 'android'

	return bisect.BisectOptions.FromDict(opts_dict)


	def _RunPerformanceTest(config, path_to_file):
	# Bisect script expects to be run from src
	os.chdir(os.path.join(path_to_file, '..'))

	bisect_utils.OutputAnnotationStepStart('Building With Patch')

	opts = _CreateBisectOptionsFromConfig(config)
	b = bisect.BisectPerformanceMetrics(None, opts)

	if bisect_utils.RunGClient(['runhooks']):
	raise RuntimeError('Failed to run gclient runhooks')

	if not b.BuildCurrentRevision('chromium'):
	raise RuntimeError('Patched version failed to build.')

	bisect_utils.OutputAnnotationStepClosed()
	bisect_utils.OutputAnnotationStepStart('Running With Patch')

	results_with_patch = b.RunPerformanceTestAndParseResults(
	opts.command, opts.metric, reset_on_first_run=True, results_label='Patch')

	if results_with_patch[1]:
	raise RuntimeError('Patched version failed to run performance test.')

	bisect_utils.OutputAnnotationStepClosed()

	bisect_utils.OutputAnnotationStepStart('Reverting Patch')
	if bisect_utils.RunGClient(['revert']):
	raise RuntimeError('Failed to run gclient runhooks')
	bisect_utils.OutputAnnotationStepClosed()

	bisect_utils.OutputAnnotationStepStart('Building Without Patch')

	if bisect_utils.RunGClient(['runhooks']):
	raise RuntimeError('Failed to run gclient runhooks')

	if not b.BuildCurrentRevision('chromium'):
	raise RuntimeError('Unpatched version failed to build.')

	bisect_utils.OutputAnnotationStepClosed()
	bisect_utils.OutputAnnotationStepStart('Running Without Patch')

	results_without_patch = b.RunPerformanceTestAndParseResults(
	opts.command, opts.metric, upload_on_last_run=True, results_label='ToT')

	if results_without_patch[1]:
	raise RuntimeError('Unpatched version failed to run performance test.')

	# Find the link to the cloud stored results file.
	output = results_without_patch[2]
	cloud_file_link = [t for t in output.splitlines()
	if 'storage.googleapis.com/chromium-telemetry/html-results/' in t]
	if cloud_file_link:
	# What we're getting here is basically "View online at http://..." so parse
	# out just the url portion.
	cloud_file_link = cloud_file_link[0]
	cloud_file_link = [t for t in cloud_file_link.split(' ')
	if 'storage.googleapis.com/chromium-telemetry/html-results/' in t]
	assert cloud_file_link, "Couldn't parse url from output."
	cloud_file_link = cloud_file_link[0]
	else:
	cloud_file_link = ''

	# Calculate the % difference in the means of the 2 runs.
	percent_diff_in_means = (results_with_patch[0]['mean'] /
	max(0.0001, results_without_patch[0]['mean'])) * 100.0 - 100.0
	std_err = bisect.CalculatePooledStandardError(
	[results_with_patch[0]['values'], results_without_patch[0]['values']])

	bisect_utils.OutputAnnotationStepClosed()
	bisect_utils.OutputAnnotationStepStart('Results - %.02f +- %0.02f delta' %
	(percent_diff_in_means, std_err))
	print ' %s %s %s' % (''.center(10, ' '), 'Mean'.center(20, ' '),
	'Std. Error'.center(20, ' '))
	print ' %s %s %s' % ('Patch'.center(10, ' '),
	('%.02f' % results_with_patch[0]['mean']).center(20, ' '),
	('%.02f' % results_with_patch[0]['std_err']).center(20, ' '))
	print ' %s %s %s' % ('No Patch'.center(10, ' '),
	('%.02f' % results_without_patch[0]['mean']).center(20, ' '),
	('%.02f' % results_without_patch[0]['std_err']).center(20, ' '))
	if cloud_file_link:
	bisect_utils.OutputAnnotationStepLink('HTML Results', cloud_file_link)
	bisect_utils.OutputAnnotationStepClosed()


	def _SetupAndRunPerformanceTest(config, path_to_file, path_to_goma):
	"""Attempts to build and run the current revision with and without the
	current patch, with the parameters passed in.

	Args:
	config: The config read from run-perf-test.cfg.
	path_to_file: Path to the bisect-perf-regression.py script.
	path_to_goma: Path to goma directory.

	Returns:
	0 on success, otherwise 1.
	"""
	try:
	with Goma(path_to_goma) as goma:
	config['use_goma'] = bool(path_to_goma)
	config['goma_dir'] = os.path.abspath(path_to_goma)
	_RunPerformanceTest(config, path_to_file)
	return 0
	except RuntimeError, e:
	bisect_utils.OutputAnnotationStepClosed()
	_OutputFailedResults('Error: %s' % e.message)
	return 1


	def _RunBisectionScript(config, working_directory, path_to_file, path_to_goma,
	path_to_extra_src, dry_run):
	"""Attempts to execute src/tools/bisect-perf-regression.py with the parameters
	passed in.

	Args:
	config: A dict containing the parameters to pass to the script.
	working_directory: A working directory to provide to the
	bisect-perf-regression.py script, where it will store it's own copy of
	the depot.
	path_to_file: Path to the bisect-perf-regression.py script.
	path_to_goma: Path to goma directory.
	path_to_extra_src: Path to extra source file.
	dry_run: Do a dry run, skipping sync, build, and performance testing steps.

	Returns:
	0 on success, otherwise 1.
	"""
	bisect_utils.OutputAnnotationStepStart('Config')
	print
	for k, v in config.iteritems():
	print ' %s : %s' % (k, v)
	print
	bisect_utils.OutputAnnotationStepClosed()

	cmd = ['python', os.path.join(path_to_file, 'bisect-perf-regression.py'),
	'-c', config['command'],
	'-g', config['good_revision'],
	'-b', config['bad_revision'],
	'-m', config['metric'],
	'--working_directory', working_directory,
	'--output_buildbot_annotations']

	if config['repeat_count']:
	cmd.extend(['-r', config['repeat_count']])

	if config['truncate_percent']:
	cmd.extend(['-t', config['truncate_percent']])

	if config['max_time_minutes']:
	cmd.extend(['--max_time_minutes', config['max_time_minutes']])

	if config.has_key('bisect_mode'):
	cmd.extend(['--bisect_mode', config['bisect_mode']])

	cmd.extend(['--build_preference', 'ninja'])

	if '--browser=cros' in config['command']:
	cmd.extend(['--target_platform', 'cros'])

	if os.environ[CROS_BOARD_ENV] and os.environ[CROS_IP_ENV]:
	cmd.extend(['--cros_board', os.environ[CROS_BOARD_ENV]])
	cmd.extend(['--cros_remote_ip', os.environ[CROS_IP_ENV]])
	else:
	print 'Error: Cros build selected, but BISECT_CROS_IP or'\
	'BISECT_CROS_BOARD undefined.'
	print
	return 1

	if 'android' in config['command']:
	if 'android-chrome-shell' in config['command']:
	cmd.extend(['--target_platform', 'android'])
	elif 'android-chrome' in config['command']:
	cmd.extend(['--target_platform', 'android-chrome'])
	else:
	cmd.extend(['--target_platform', 'android'])

	if path_to_goma:
	# crbug.com/330900. For Windows XP platforms, GOMA service is not supported.
	# Moreover we don't compile chrome when gs_bucket flag is set instead
	# use builds archives, therefore ignore GOMA service for Windows XP.
	if config.get('gs_bucket') and platform.release() == 'XP':
	print ('Goma doesn\'t have a win32 binary, therefore it is not supported '
	'on Windows XP platform. Please refer to crbug.com/330900.')
	path_to_goma = None
	cmd.append('--use_goma')

	if path_to_extra_src:
	cmd.extend(['--extra_src', path_to_extra_src])

	# These flags are used to download build archives from cloud storage if
	# available, otherwise will post a try_job_http request to build it on
	# tryserver.
	if config.get('gs_bucket'):
	if config.get('builder_host') and config.get('builder_port'):
	cmd.extend(['--gs_bucket', config['gs_bucket'],
	'--builder_host', config['builder_host'],
	'--builder_port', config['builder_port']
	])
	else:
	print ('Error: Specified gs_bucket, but missing builder_host or '
	'builder_port information in config.')
	return 1

	if dry_run:
	cmd.extend(['--debug_ignore_build', '--debug_ignore_sync',
	'--debug_ignore_perf_test'])
	cmd = [str(c) for c in cmd]

	with Goma(path_to_goma) as goma:
	return_code = subprocess.call(cmd)

	if return_code:
	print 'Error: bisect-perf-regression.py returned with error %d' %\
	return_code
	print

	return return_code


	def main():

	usage = ('%prog [options] [-- chromium-options]\n'
	'Used by a trybot to run the bisection script using the parameters'
	' provided in the run-bisect-perf-regression.cfg file.')

	parser = optparse.OptionParser(usage=usage)
	parser.add_option('-w', '--working_directory',
	type='str',
	help='A working directory to supply to the bisection '
	'script, which will use it as the location to checkout '
	'a copy of the chromium depot.')
	parser.add_option('-p', '--path_to_goma',
	type='str',
	help='Path to goma directory. If this is supplied, goma '
	'builds will be enabled.')
	parser.add_option('--path_to_config',
	type='str',
	help='Path to the config file to use. If this is supplied, '
	'the bisect script will use this to override the default '
	'config file path. The script will attempt to load it '
	'as a bisect config first, then a perf config.')
	parser.add_option('--extra_src',
	type='str',
	help='Path to extra source file. If this is supplied, '
	'bisect script will use this to override default behavior.')
	parser.add_option('--dry_run',
	action="store_true",
	help='The script will perform the full bisect, but '
	'without syncing, building, or running the performance '
	'tests.')
	(opts, args) = parser.parse_args()

	path_to_current_directory = os.path.abspath(os.path.dirname(sys.argv[0]))

	# If they've specified their own config file, use that instead.
	if opts.path_to_config:
	path_to_bisect_cfg = opts.path_to_config
	else:
	path_to_bisect_cfg = os.path.join(path_to_current_directory,
	'run-bisect-perf-regression.cfg')

	config = _LoadConfigFile(path_to_bisect_cfg)

	# Check if the config is valid.
	config_is_valid = _ValidateBisectConfigFile(config)

	if config and config_is_valid:
	if not opts.working_directory:
	print 'Error: missing required parameter: --working_directory'
	print
	parser.print_help()
	return 1

	return _RunBisectionScript(config, opts.working_directory,
	path_to_current_directory, opts.path_to_goma, opts.extra_src,
	opts.dry_run)
	else:
	perf_cfg_files = ['run-perf-test.cfg', os.path.join('..', 'third_party',
	'WebKit', 'Tools', 'run-perf-test.cfg')]

	for current_perf_cfg_file in perf_cfg_files:
	if opts.path_to_config:
	path_to_perf_cfg = opts.path_to_config
	else:
	path_to_perf_cfg = os.path.join(
	os.path.abspath(os.path.dirname(sys.argv[0])),
	current_perf_cfg_file)

	config = _LoadConfigFile(path_to_perf_cfg)
	config_is_valid = _ValidatePerfConfigFile(config)

	if config and config_is_valid:
	return _SetupAndRunPerformanceTest(config, path_to_current_directory,
	opts.path_to_goma)

	print 'Error: Could not load config file. Double check your changes to '\
	'run-bisect-perf-regression.cfg/run-perf-test.cfg for syntax errors.'
	print
	return 1


	if __name__ == '__main__':
	sys.exit(main())