Removes files from //build that we don't need

build/android/pylib/perf/test_runner.py

-# Copyright 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.
-
-"""Runs perf tests.
-
-Our buildbot infrastructure requires each slave to run steps serially.
-This is sub-optimal for android, where these steps can run independently on
-multiple connected devices.
-
-The buildbots will run this script multiple times per cycle:
-- First: all steps listed in --steps in will be executed in parallel using all
-connected devices. Step results will be pickled to disk. Each step has a unique
-name. The result code will be ignored if the step name is listed in
---flaky-steps.
-The buildbot will treat this step as a regular step, and will not process any
-graph data.
-
-- Then, with -print-step STEP_NAME: at this stage, we'll simply print the file
-with the step results previously saved. The buildbot will then process the graph
-data accordingly.
-
-The JSON steps file contains a dictionary in the format:
-{ "version": int,
-  "steps": {
-    "foo": {
-      "device_affinity": int,
-      "cmd": "script_to_execute foo"
-    },
-    "bar": {
-      "device_affinity": int,
-      "cmd": "script_to_execute bar"
-    }
-  }
-}
-
-The JSON flaky steps file contains a list with step names which results should
-be ignored:
-[
-  "step_name_foo",
-  "step_name_bar"
-]
-
-Note that script_to_execute necessarily have to take at least the following
-option:
-  --device: the serial number to be passed to all adb commands.
-"""
-
-import collections
-import datetime
-import json
-import logging
-import os
-import pickle
-import shutil
-import sys
-import tempfile
-import threading
-import time
-
-from pylib import cmd_helper
-from pylib import constants
-from pylib import forwarder
-from pylib.base import base_test_result
-from pylib.base import base_test_runner
-from pylib.device import battery_utils
-from pylib.device import device_errors
-
-
-def GetPersistedResult(test_name):
-  file_name = os.path.join(constants.PERF_OUTPUT_DIR, test_name)
-  if not os.path.exists(file_name):
-    logging.error('File not found %s', file_name)
-    return None
-
-  with file(file_name, 'r') as f:
-    return pickle.loads(f.read())
-
-
-def OutputJsonList(json_input, json_output):
-  with file(json_input, 'r') as i:
-    all_steps = json.load(i)
-
-  step_values = []
-  for k, v in all_steps['steps'].iteritems():
-    data = {'test': k, 'device_affinity': v['device_affinity']}
-
-    persisted_result = GetPersistedResult(k)
-    if persisted_result:
-      data['total_time'] = persisted_result['total_time']
-    step_values.append(data)
-
-  with file(json_output, 'w') as o:
-    o.write(json.dumps(step_values))
-  return 0
-
-
-def PrintTestOutput(test_name, json_file_name=None):
-  """Helper method to print the output of previously executed test_name.
-
-  Args:
-    test_name: name of the test that has been previously executed.
-    json_file_name: name of the file to output chartjson data to.
-
-  Returns:
-    exit code generated by the test step.
-  """
-  persisted_result = GetPersistedResult(test_name)
-  if not persisted_result:
-    return 1
-  logging.info('*' * 80)
-  logging.info('Output from:')
-  logging.info(persisted_result['cmd'])
-  logging.info('*' * 80)
-  print persisted_result['output']
-
-  if json_file_name:
-    with file(json_file_name, 'w') as f:
-      f.write(persisted_result['chartjson'])
-
-  return persisted_result['exit_code']
-
-
-def PrintSummary(test_names):
-  logging.info('*' * 80)
-  logging.info('Sharding summary')
-  device_total_time = collections.defaultdict(int)
-  for test_name in test_names:
-    file_name = os.path.join(constants.PERF_OUTPUT_DIR, test_name)
-    if not os.path.exists(file_name):
-      logging.info('%s : No status file found', test_name)
-      continue
-    with file(file_name, 'r') as f:
-      result = pickle.loads(f.read())
-    logging.info('%s : exit_code=%d in %d secs at %s',
-                 result['name'], result['exit_code'], result['total_time'],
-                 result['device'])
-    device_total_time[result['device']] += result['total_time']
-  for device, device_time in device_total_time.iteritems():
-    logging.info('Total for device %s : %d secs', device, device_time)
-  logging.info('Total steps time: %d secs', sum(device_total_time.values()))
-
-
-class _HeartBeatLogger(object):
-  # How often to print the heartbeat on flush().
-  _PRINT_INTERVAL = 30.0
-
-  def __init__(self):
-    """A file-like class for keeping the buildbot alive."""
-    self._len = 0
-    self._tick = time.time()
-    self._stopped = threading.Event()
-    self._timer = threading.Thread(target=self._runner)
-    self._timer.start()
-
-  def _runner(self):
-    while not self._stopped.is_set():
-      self.flush()
-      self._stopped.wait(_HeartBeatLogger._PRINT_INTERVAL)
-
-  def write(self, data):
-    self._len += len(data)
-
-  def flush(self):
-    now = time.time()
-    if now - self._tick >= _HeartBeatLogger._PRINT_INTERVAL:
-      self._tick = now
-      print '--single-step output length %d' % self._len
-      sys.stdout.flush()
-
-  def stop(self):
-    self._stopped.set()
-
-
-class TestRunner(base_test_runner.BaseTestRunner):
-  def __init__(self, test_options, device, shard_index, max_shard, tests,
-      flaky_tests):
-    """A TestRunner instance runs a perf test on a single device.
-
-    Args:
-      test_options: A PerfOptions object.
-      device: Device to run the tests.
-      shard_index: the index of this device.
-      max_shards: the maximum shard index.
-      tests: a dict mapping test_name to command.
-      flaky_tests: a list of flaky test_name.
-    """
-    super(TestRunner, self).__init__(device, None)
-    self._options = test_options
-    self._shard_index = shard_index
-    self._max_shard = max_shard
-    self._tests = tests
-    self._flaky_tests = flaky_tests
-    self._output_dir = None
-    self._device_battery = battery_utils.BatteryUtils(self.device)
-
-  @staticmethod
-  def _IsBetter(result):
-    if result['actual_exit_code'] == 0:
-      return True
-    pickled = os.path.join(constants.PERF_OUTPUT_DIR,
-                           result['name'])
-    if not os.path.exists(pickled):
-      return True
-    with file(pickled, 'r') as f:
-      previous = pickle.loads(f.read())
-    return result['actual_exit_code'] < previous['actual_exit_code']
-
-  @staticmethod
-  def _SaveResult(result):
-    if TestRunner._IsBetter(result):
-      with file(os.path.join(constants.PERF_OUTPUT_DIR,
-                             result['name']), 'w') as f:
-        f.write(pickle.dumps(result))
-
-  def _CheckDeviceAffinity(self, test_name):
-    """Returns True if test_name has affinity for this shard."""
-    affinity = (self._tests['steps'][test_name]['device_affinity'] %
-                self._max_shard)
-    if self._shard_index == affinity:
-      return True
-    logging.info('Skipping %s on %s (affinity is %s, device is %s)',
-                 test_name, self.device_serial, affinity, self._shard_index)
-    return False
-
-  def _CleanupOutputDirectory(self):
-    if self._output_dir:
-      shutil.rmtree(self._output_dir, ignore_errors=True)
-      self._output_dir = None
-
-  def _ReadChartjsonOutput(self):
-    if not self._output_dir:
-      return ''
-
-    json_output_path = os.path.join(self._output_dir, 'results-chart.json')
-    try:
-      with open(json_output_path) as f:
-        return f.read()
-    except IOError:
-      logging.exception('Exception when reading chartjson.')
-      logging.error('This usually means that telemetry did not run, so it could'
-                    ' not generate the file. Please check the device running'
-                    ' the test.')
-      return ''
-
-  def _LaunchPerfTest(self, test_name):
-    """Runs a perf test.
-
-    Args:
-      test_name: the name of the test to be executed.
-
-    Returns:
-      A tuple containing (Output, base_test_result.ResultType)
-    """
-    if not self._CheckDeviceAffinity(test_name):
-      return '', base_test_result.ResultType.PASS
-
-    try:
-      logging.warning('Unmapping device ports')
-      forwarder.Forwarder.UnmapAllDevicePorts(self.device)
-      self.device.old_interface.RestartAdbdOnDevice()
-    except Exception as e:
-      logging.error('Exception when tearing down device %s', e)
-
-    cmd = ('%s --device %s' %
-           (self._tests['steps'][test_name]['cmd'],
-            self.device_serial))
-
-    if self._options.collect_chartjson_data:
-      self._output_dir = tempfile.mkdtemp()
-      cmd = cmd + ' --output-dir=%s' % self._output_dir
-
-    logging.info(
-        'temperature: %s (0.1 C)',
-        str(self._device_battery.GetBatteryInfo().get('temperature')))
-    if self._options.max_battery_temp:
-      self._device_battery.LetBatteryCoolToTemperature(
-          self._options.max_battery_temp)
-
-    logging.info('Charge level: %s%%',
-        str(self._device_battery.GetBatteryInfo().get('level')))
-    if self._options.min_battery_level:
-      self._device_battery.ChargeDeviceToLevel(
-          self._options.min_battery_level)
-
-    logging.info('%s : %s', test_name, cmd)
-    start_time = datetime.datetime.now()
-
-    timeout = self._tests['steps'][test_name].get('timeout', 5400)
-    if self._options.no_timeout:
-      timeout = None
-    logging.info('Timeout for %s test: %s', test_name, timeout)
-    full_cmd = cmd
-    if self._options.dry_run:
-      full_cmd = 'echo %s' % cmd
-
-    logfile = sys.stdout
-    if self._options.single_step:
-      # Just print a heart-beat so that the outer buildbot scripts won't timeout
-      # without response.
-      logfile = _HeartBeatLogger()
-    cwd = os.path.abspath(constants.DIR_SOURCE_ROOT)
-    if full_cmd.startswith('src/'):
-      cwd = os.path.abspath(os.path.join(constants.DIR_SOURCE_ROOT, os.pardir))
-    try:
-      exit_code, output = cmd_helper.GetCmdStatusAndOutputWithTimeout(
-          full_cmd, timeout, cwd=cwd, shell=True, logfile=logfile)
-      json_output = self._ReadChartjsonOutput()
-    except cmd_helper.TimeoutError as e:
-      exit_code = -1
-      output = str(e)
-      json_output = ''
-    finally:
-      self._CleanupOutputDirectory()
-      if self._options.single_step:
-        logfile.stop()
-    end_time = datetime.datetime.now()
-    if exit_code is None:
-      exit_code = -1
-    logging.info('%s : exit_code=%d in %d secs at %s',
-                 test_name, exit_code, (end_time - start_time).seconds,
-                 self.device_serial)
-
-    if exit_code == 0:
-      result_type = base_test_result.ResultType.PASS
-    else:
-      result_type = base_test_result.ResultType.FAIL
-      # Since perf tests use device affinity, give the device a chance to
-      # recover if it is offline after a failure. Otherwise, the master sharder
-      # will remove it from the pool and future tests on this device will fail.
-      try:
-        self.device.WaitUntilFullyBooted(timeout=120)
-      except device_errors.CommandTimeoutError as e:
-        logging.error('Device failed to return after %s: %s' % (test_name, e))
-
-    actual_exit_code = exit_code
-    if test_name in self._flaky_tests:
-      # The exit_code is used at the second stage when printing the
-      # test output. If the test is flaky, force to "0" to get that step green
-      # whilst still gathering data to the perf dashboards.
-      # The result_type is used by the test_dispatcher to retry the test.
-      exit_code = 0
-
-    persisted_result = {
-        'name': test_name,
-        'output': output,
-        'chartjson': json_output,
-        'exit_code': exit_code,
-        'actual_exit_code': actual_exit_code,
-        'result_type': result_type,
-        'total_time': (end_time - start_time).seconds,
-        'device': self.device_serial,
-        'cmd': cmd,
-    }
-    self._SaveResult(persisted_result)
-
-    return (output, result_type)
-
-  def RunTest(self, test_name):
-    """Run a perf test on the device.
-
-    Args:
-      test_name: String to use for logging the test result.
-
-    Returns:
-      A tuple of (TestRunResults, retry).
-    """
-    _, result_type = self._LaunchPerfTest(test_name)
-    results = base_test_result.TestRunResults()
-    results.AddResult(base_test_result.BaseTestResult(test_name, result_type))
-    retry = None
-    if not results.DidRunPass():
-      retry = test_name
-    return results, retry