Android perf tests: print output more often.

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 65 matching lines @@
   logging.info('Output from:')
   logging.info(persisted_result['cmd'])
   logging.info('*' * 80)
   print persisted_result['output']
 
   return persisted_result['exit_code']
 
 
 class _HeartBeatLogger(object):
   # How often to print the heartbeat on flush().
-  _PRINT_INTERVAL = 600
+  _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):
@@ skipping 131 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