Move PerfTest TraceEvent to async

build/android/pylib/json_perf_parser.py

 # Copyright (c) 2012 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.
 
 
 """A helper module for parsing JSON objects from perf tests results."""
 
 import json
 
 
 def GetAverageRunInfo(json_data, name):
   """Summarizes TraceEvent JSON data for performance metrics.
 
   Example JSON Inputs (More tags can be added but these are required):
   Measuring Duration:
   [
     { "cat": "Java",
       "ts": 10000000000,
-      "ph": "B",
+      "ph": "S",
       "name": "TestTrace"
     },
     { "cat": "Java",
       "ts": 10000004000,
-      "ph": "E",
+      "ph": "F",
       "name": "TestTrace"
     },
     ...
   ]
 
   Measuring Call Frequency (FPS):
   [
     { "cat": "Java",
       "ts": 10000000000,
       "ph": "I",
@@ skipping 64 matching lines @@
           return float(entry['ts']) / 1000.0
 
         result['units'] = 'ms'
       else:
         raise Exception('Entry did not contain valid value info: %s' % entry)
 
     if not val_type in entry:
       raise Exception('Entry did not contain expected value type "%s" '
                       'information: %s' % (val_type, entry))
     val = GetVal(entry)
-    if (entry['ph'] == 'B' and
+    if (entry['ph'] == 'S' and
         (result['type'] == 'Unknown' or result['type'] == 'Span')):
       result['type'] = 'Span'
       last_val = val
-    elif ((entry['ph'] == 'E' and result['type'] == 'Span') or
+    elif ((entry['ph'] == 'F' and result['type'] == 'Span') or
           (entry['ph'] == 'I' and (result['type'] == 'Unknown' or
                                    result['type'] == 'Instant'))):
       if last_val > 0:
         delta = val - last_val
         if result['min'] == -1 or result['min'] > delta:
           result['min'] = delta
         if result['max'] == -1 or result['max'] < delta:
           result['max'] = delta
         total_sum += delta
         result['count'] += 1
@@ skipping 27 matching lines @@
     name: The 'name' tag to filter on in the JSON file.
 
   Returns:
     See GetAverageRunInfo Returns section.
   """
   with open(json_file, 'r') as f:
     data = f.read()
     perf = json.loads(data)
 
   return GetAverageRunInfo(perf, name)