[Android] Implement perf tests to platform mode.

build/android/pylib/perf/perf_test_instance.py

+# Copyright 2015 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.
+
+import json
+import logging
+import os
+import pickle
+
+from pylib import constants
+from pylib.base import test_instance
+from pylib.constants import exit_codes
+
+
+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())
+
+
+class PerfTestInstance(test_instance.TestInstance):
+  def __init__(self, args, _):
+    self._STR = 'Local Device Perf Test Instance: '
+    super(PerfTestInstance, self).__init__()
+
+    if args.single_step:
+      args.single_step = ' '.join(args.single_step_command)
+    self.steps = args.steps
+    self.flaky_steps = args.flaky_steps
+    self.output_json_list = args.output_json_list
+    self.print_step = args.print_step
+    self.single_step = args.single_step
+    self.no_timeout = args.no_timeout
+    self.test_filter = args.test_filter
+    self.dry_run = args.dry_run
+    self.collect_chartjson_data = args.collect_chartjson_data
+    self._output_chartjson_data = args.output_chartjson_data
+    self._get_output_dir_archive = args.get_output_dir_archive
+    self.max_battery_temp = args.max_battery_temp
+    self.min_battery_level = args.min_battery_level
+    self.known_devices_file = args.known_devices_file
+
+  def SetUp(self):
+    pass
+
+  def TearDown(self):
+    pass
+
+  def OutputJsonList(self):
+    with file(self.steps, '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['start_time'] = persisted_result['start_time']
+        data['end_time'] = persisted_result['end_time']
+        data['total_time'] = persisted_result['total_time']
+        data['has_archive'] = persisted_result['archive_bytes'] is not None
+      step_values.append(data)
+
+    with file(self.output_json_list, 'w') as o:
+      o.write(json.dumps(step_values))
+    return 0
+
+
+  def PrintTestOutput(self):
+    """Helper method to print the output of previously executed test_name.
+
+    Test_name is passed from the command line as print_step
+
+    Returns:
+      exit code generated by the test step.
+    """
+    persisted_result = _GetPersistedResult(self.print_step)
+    if not persisted_result:
+      return exit_codes.INFRA
+    logging.info('*' * 80)
+    logging.info('Output from:')
+    logging.info(persisted_result['cmd'])
+    logging.info('*' * 80)
+
+    output_formatted = ''
+    persisted_outputs = persisted_result['output']
+    for i in xrange(len(persisted_outputs)):
+      output_formatted += '\n\nOutput from run #%d:\n\n%s' % (
+          i, persisted_outputs[i])
+    print output_formatted
+
+    if self._output_chartjson_data:
+      with file(self._output_chartjson_data, 'w') as f:
+        f.write(persisted_result['chartjson'])
+
+    if self._get_output_dir_archive:
+      if persisted_result['archive_bytes'] is not None:
+        with file(self._get_output_dir_archive, 'wb') as f:
+          f.write(persisted_result['archive_bytes'])
+      else:
+        logging.error('The output dir was not archived.')
+
+    return persisted_result['exit_code']
+
+  #override
+  def TestType(self):
+    return 'Perf'

[jbudorick, 2016/06/01 20:46:06]

nit: 'perf'

[rnephew (Reviews Here), 2016/06/01 21:01:39]

I capitalized it because of the old usage here:
https://code.google.com/p/chromium/codesearch#chromium/src/build/android/test...

[jbudorick, 2016/06/01 21:16:09]

Why do we do that? Where is it used? What if we change it?

[rnephew (Reviews Here), 2016/06/01 21:23:17]

I didn't dig into the LogFull() code yet, I'll look into that and see if
lowercasing it when it was capitalized before will cause any issues.

[rnephew (Reviews Here), 2016/06/01 22:14:15]

Done.

+
+  @staticmethod
+  def _ReadChartjsonOutput(output_dir):
+    if not output_dir:
+      return ''
+    json_output_path = os.path.join(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 ''
+