Flush stdout when printing perf values for ChromeOS in pyauto perf tests.

chrome/test/functional/perf.py

 #!/usr/bin/env python
 # Copyright (c) 2011 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.
 
 """Basic pyauto performance tests.
 
 For tests that need to be run for multiple iterations (e.g., so that average
 and standard deviation values can be reported), the default number of iterations
 run for each of these tests is specified by |_DEFAULT_NUM_ITERATIONS|.
@@ skipping 12 matching lines @@
 
 import BaseHTTPServer
 import commands
 import logging
 import math
 import os
 import posixpath
 import re
 import SimpleHTTPServer
 import SocketServer
+import sys
 import tempfile
 import threading
 import time
 import timeit
 import urllib
 import urllib2
 import urlparse
 
 import pyauto_functional  # Must be imported before pyauto.
 import pyauto
@@ skipping 85 matching lines @@
                    database.
       value: A numeric value representing a single performance measurement.
     """
     if self.IsChromeOS():
       if len(description) > 30:
         logging.warning('The description "%s" will be truncated to "%s" '
                         '(length 30) when added to the autotest database.',
                         description, description[:30])
       print '\n%s(\'%s\', %.2f)%s' % (self._PERF_OUTPUT_MARKER_PRE, description,
                                       value, self._PERF_OUTPUT_MARKER_POST)
+      sys.stdout.flush()
 
   def _PrintSummaryResults(self, description, values, units):
     """Logs summary measurement information.
 
     This function computes and outputs the average and standard deviation of
     the specified list of value measurements.  It also invokes
     _OutputPerfGraphValue() with the computed *average* value, to ensure the
     average value can be plotted in a performance graph.
 
     Args:
@@ skipping 1310 matching lines @@
     """Identifies the port number to which the server is currently bound.
 
     Returns:
       The numeric port number to which the server is currently bound.
     """
     return self._server.server_address[1]
 
 
 if __name__ == '__main__':
   pyauto_functional.Main()