[Android] Implement perf tests to platform mode.

build/android/pylib/perf/perf_test_instance.py

Index: build/android/pylib/perf/perf_test_instance.py
diff --git a/build/android/pylib/perf/perf_test_instance.py b/build/android/pylib/perf/perf_test_instance.py
new file mode 100644
index 0000000000000000000000000000000000000000..147043db9bc5d29bf5d98f77858f4c17ec4ba590
--- /dev/null
+++ b/build/android/pylib/perf/perf_test_instance.py
@@ -0,0 +1,233 @@
+# Copyright 2016 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
+import re
+
+from devil.utils import cmd_helper
+from pylib import constants
+from pylib.base import base_test_result
+from pylib.base import test_instance
+from pylib.constants import exit_codes
+from pylib.constants import host_paths
+
+
+_GIT_CR_POS_RE = re.compile(r'^Cr-Commit-Position: refs/heads/master@{#(\d+)}$')
+
+
+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 _GetChromiumRevision():
+  # pylint: disable=line-too-long
+  """Get the git hash and commit position of the chromium master branch.
+
+  See:
+  https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/runtest.py#212

[mikecase (-- gone --), 2016/07/12 18:33:14]

You can optionally pick a specific revision to link to instead of just master,
like....

https://chromium.googlesource.com/chromium/tools/build/+/387e3cf3/scripts/sla...

but yeah, it's fine as is.

[rnephew (Reviews Here), 2016/07/12 18:55:26]

Done.

+
+  Returns:
+    A dictionary with 'revision' and 'commit_pos' keys.
+  """
+  # pylint: enable=line-too-long
+  status, output = cmd_helper.GetCmdStatusAndOutput(
+      ['git', 'log', '-n', '1', '--pretty=format:%H%n%B', 'HEAD'],
+      cwd=host_paths.DIR_SOURCE_ROOT)
+  revision = None
+  commit_pos = None
+  if not status:
+    lines = output.splitlines()
+    revision = lines[0]
+    for line in reversed(lines):
+      m = _GIT_CR_POS_RE.match(line.strip())
+      if m:
+        commit_pos = int(m.group(1))
+        break
+  return {'revision': revision, 'commit_pos': commit_pos}
+
+
+class PerfTestInstance(test_instance.TestInstance):
+  def __init__(self, args, _):
+    super(PerfTestInstance, self).__init__()
+
+    if args.single_step:
+      args.single_step = ' '.join(args.single_step_command)
+
+    self._collect_chartjson_data = args.collect_chartjson_data
+    self._dry_run = args.dry_run
+    self._flaky_steps = args.flaky_steps
+    self._output_dir_archive_path = args.output_dir_archive_path
+    self._known_devices_file = args.known_devices_file
+    self._max_battery_temp = args.max_battery_temp
+    self._min_battery_level = args.min_battery_level
+    self._no_timeout = args.no_timeout
+    self._output_chartjson_data = args.output_chartjson_data
+    self._output_json_list = args.output_json_list
+    self._print_step = args.print_step
+    self._single_step = args.single_step

[jbudorick, 2016/07/12 18:45:10]

nit: Why isn't this just:

  self._single_step = ' '.join(args.single_step_command) if args.single_step
else None

eliminating the if args.single_step line above?

[rnephew (Reviews Here), 2016/07/12 21:05:47]

Done.

+    self._steps = args.steps
+    self._test_filter = args.test_filter
+    self._write_buildbot_json = args.write_buildbot_json
+
+  def SetUp(self):
+    pass
+
+  def TearDown(self):
+    pass
+
+  def OutputJsonList(self):
+    try:
+      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 base_test_result.ResultType.PASS
+    except KeyError:
+      logging.exception('Persistent results file missing key.')
+      return base_test_result.ResultType.FAIL
+
+  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

[jbudorick, 2016/07/12 18:45:10]

This needs to raise an infra error, not return w/ the infra exit code.

[rnephew (Reviews Here), 2016/07/12 21:05:47]

Done.

+    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._output_dir_archive_path:
+      if persisted_result['archive_bytes'] is not None:
+        with file(self._output_dir_archive_path, 'wb') as f:
+          f.write(persisted_result['archive_bytes'])
+      else:
+        logging.error('The output dir was not archived.')
+    if persisted_result['exit_code'] == 0:
+      return base_test_result.ResultType.PASS
+    return base_test_result.ResultType.FAIL
+
+  #override
+  def TestType(self):
+    return 'perf'
+
+  @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 ''
+
+  def WriteBuildBotJson(self, output_dir):
+    """Write metadata about the buildbot environment to the output dir."""
+    if not output_dir or not self._write_buildbot_json:
+      return
+    data = {
+      'chromium': _GetChromiumRevision(),
+      'environment': dict(os.environ)
+    }
+    with open(os.path.join(output_dir, 'buildbot.json'), 'w') as f:
+      json.dump(data, f, sort_keys=True, separators=(',', ': '))
+
+  @property
+  def collect_chartjson_data(self):
+    return self._collect_chartjson_data
+
+  @property
+  def dry_run(self):
+    return self._dry_run
+
+  @property
+  def flaky_steps(self):
+    return self._flaky_steps
+
+  @property
+  def known_devices_file(self):
+    return self._known_devices_file
+
+  @property
+  def max_battery_temp(self):
+    return self._max_battery_temp
+
+  @property
+  def min_battery_level(self):
+    return self._min_battery_level
+
+  @property
+  def no_timeout(self):
+    return self._no_timeout
+
+  @property
+  def output_chartjson_data(self):
+    return self._output_chartjson_data
+
+  @property
+  def output_dir_archive_path(self):
+    return self._output_dir_archive_path
+
+  @property
+  def output_json_list(self):
+    return self._output_json_list
+
+  @property
+  def print_step(self):
+    return self._print_step
+
+  @property
+  def single_step(self):
+    return self._single_step
+
+  @property
+  def steps(self):
+    return self._steps
+
+  @property
+  def test_filter(self):
+    return self._test_filter