key_mobile_sites_smooth: Reload pages before scrolling for LinkedIn and Wowwiki

tools/perf/benchmarks/smoothness.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.
 
 from benchmarks import silk_flags
 from measurements import smoothness
 import page_sets
 from telemetry import benchmark
 
 
@@ skipping 138 matching lines @@
 
   def CustomizeBrowserOptions(self, options):
     silk_flags.CustomizeBrowserOptionsForSyncScrolling(options)
 
   @classmethod
   def Name(cls):
     return 'smoothness.sync_scroll.key_mobile_sites_smooth'
 
 
 @benchmark.Enabled('android')
+class SmoothnessSyncScrollKeyMobileSitesRerun(benchmark.Benchmark):
+  """Same as SmoothnessSyncScrollKeyMobileSites but each page runs twice and
+  only the second run's result is used. This is to test the impact of cache
+  optimization.
+  """

[jdduke (slow), 2015/02/27 23:36:03]

It seems overkill to repeat the entire pageset (x2!) just to validate the shader
cache... That's a pretty heavy burden for the perf bots that are already running
long.

+  tag = 'sync_scroll'
+  test = smoothness.SmoothnessDiscardFirstResult
+  page_set = page_sets.KeyMobileSitesSmoothPageSet
+  options = {'page_repeat': 2}
+
+  def CustomizeBrowserOptions(self, options):
+    silk_flags.CustomizeBrowserOptionsForSyncScrolling(options)
+
+  @classmethod
+  def Name(cls):
+    return 'smoothness.sync_scroll.key_mobile_sites_smooth.rerun'
+
+
+@benchmark.Enabled('android')
 class SmoothnessSimpleMobilePages(benchmark.Benchmark):
   """Measures rendering statistics for simple mobile sites page set.
   """
   test = smoothness.Smoothness
   page_set = page_sets.SimpleMobileSitesPageSet
 
   @classmethod
   def Name(cls):
     return 'smoothness.simple_mobile_sites'
 
@@ skipping 84 matching lines @@
 @benchmark.Enabled('android')
 class SmoothnessPathologicalMobileSites(benchmark.Benchmark):
   """Measures task execution statistics while scrolling pathological sites.
   """
   test = smoothness.Smoothness
   page_set = page_sets.PathologicalMobileSitesPageSet
 
   @classmethod
   def Name(cls):
     return 'smoothness.pathological_mobile_sites'