Android: re-add perf test summary.

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.
 
@@ skipping 63 matching lines @@
     persisted_result = pickle.loads(f.read())
   logging.info('*' * 80)
   logging.info('Output from:')
   logging.info(persisted_result['cmd'])
   logging.info('*' * 80)
   print persisted_result['output']
 
   return persisted_result['exit_code']
 
 
+def PrintSummary(test_names):
+  logging.info('*' * 80)
+  logging.info('Sharding summary')
+  total_time = 0
+  for test_name in test_names:
+    file_name = os.path.join(constants.PERF_OUTPUT_DIR, test_name)
+    if not os.path.exists(file_name):
+      continue

[rmcilroy, 2014/02/14 15:48:40]

Do we want to print something out here (e.g., "<test_name> : No status file
found") so that we can see at a glance if something goes wrong?

[bulach, 2014/02/14 16:08:13]

good one! done.

+    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'])
+    total_time += result['total_time']
+  logging.info('Total steps time: %d secs', total_time)
+
+
 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)
@@ skipping 135 matching lines @@
     Returns:
       A tuple of (TestRunResults, retry).
     """
     output, 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