Delete trace-info.json.

tools/perf/metrics/iometric.py

 # Copyright 2014 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 sys
 
 from metrics import Metric
 from telemetry.value import scalar
 
 
@@ skipping 24 matching lines @@
       return
 
     def AddSummariesForProcessType(process_type_io, process_type_trace):
       """For a given process type, add all relevant summary results.
 
       Args:
         process_type_io: Type of process (eg Browser or Renderer).
         process_type_trace: String to be added to the trace name in the results.
       """
 
-      def AddSummaryForOperation(operation_name, trace_name_prefix, units):
+      def AddSummaryForOperation(operation_name, trace_name_prefix, units,
+                                 description):
         """Adds summary results for an operation in a process.
 
         Args:
           operation_name: The name of the operation, e.g. 'ReadOperationCount'
           trace_name_prefix: The prefix for the trace name.
         """
         if operation_name in io_stats[process_type_io]:
           value = io_stats[process_type_io][operation_name]
           if units == 'kb':
             value = value / 1024
           results.AddSummaryValue(
               scalar.ScalarValue(None, trace_name_prefix + process_type_trace,
-                                 units, value, important=False))
+                                 units, value, important=False,
+                                 description=description))
 
-      AddSummaryForOperation('ReadOperationCount', 'read_operations_', 'count')
+      AddSummaryForOperation('ReadOperationCount', 'read_operations_', 'count',
+                             'Number of IO read operations.')
       AddSummaryForOperation('WriteOperationCount', 'write_operations_',
-                             'count')
-      AddSummaryForOperation('ReadTransferCount', 'read_bytes_', 'kb')
-      AddSummaryForOperation('WriteTransferCount', 'write_bytes_', 'kb')
+                             'count', 'Number of IO write operations.')
+      AddSummaryForOperation('ReadTransferCount', 'read_bytes_', 'kb',
+                             'Number of IO bytes read.')
+      AddSummaryForOperation('WriteTransferCount', 'write_bytes_', 'kb',
+                             'Number of IO bytes written.')
 
     AddSummariesForProcessType('Browser', 'browser')
     AddSummariesForProcessType('Renderer', 'renderer')
     AddSummariesForProcessType('Gpu', 'gpu')