telemetry: Use trace categories to configure synthetic delays

BUG=307841
TEST=tools/perf/run_benchmark scheduler.tough_scheduling_cases

Review URL: https://codereview.chromium.org/103143007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243993 0039d316-1c4b-4281-b951-d872f2087c98

tools/perf/benchmarks/scheduler.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.
+
+from telemetry import test
+from measurements import smoothness
+
+
+class SchedulerToughSchedulingCases(test.Test):
+  """Measures rendering statistics while interacting with pages that have
+  challenging scheduling properties.
+
+  https://docs.google.com/a/chromium.org/document/d/
+      17yhE5Po9By0sCdM1yZT3LiUECaUr_94rQt9j-4tOQIM/view"""
+  test = smoothness.Smoothness
+  page_set = 'page_sets/tough_scheduling_cases.json'
+

tools/perf/benchmarks/smoothness.py

@@ -29,13 +29,3 @@ class SmoothnessKeyMobileSites(test.Test):
   http://www.chromium.org/developers/design-documents/rendering-benchmarks"""
   test = smoothness.Smoothness
   page_set = 'page_sets/key_mobile_sites.json'
-
-
-class SmoothnessToughSchedulingCases(test.Test):
-  """Measures rendering statistics while interacting with pages that have
-  challenging scheduling properties.
-
-  https://docs.google.com/a/chromium.org/document/d/
-      17yhE5Po9By0sCdM1yZT3LiUECaUr_94rQt9j-4tOQIM/view"""
-  test = smoothness.Smoothness
-  page_set = 'page_sets/tough_scheduling_cases.json'

tools/perf/metrics/smoothness.py

@@ -27,6 +27,17 @@ class NoSupportedActionError(page_measurement.MeasurementFailure):
         'None of the actions is supported by smoothness measurement')
 
 
+def _GetSyntheticDelayCategoriesFromPage(page):
+  if not hasattr(page, 'synthetic_delays'):
+    return []
+  result = []
+  for delay, options in page.synthetic_delays.items():
+    options = '%f;%s' % (options.get('target_duration', 0),
+                         options.get('mode', 'static'))
+    result.append('DELAY(%s;%s)' % (delay, options))
+  return result
+
+
 class SmoothnessMetric(Metric):
   def __init__(self):
     super(SmoothnessMetric, self).__init__()
@@ -37,7 +48,9 @@ class SmoothnessMetric(Metric):
     self._actions.append(action)
 
   def Start(self, page, tab):
-    tab.browser.StartTracing('webkit.console,benchmark', 60)
+    custom_categories = ['webkit.console', 'benchmark']
+    custom_categories += _GetSyntheticDelayCategoriesFromPage(page)
+    tab.browser.StartTracing(','.join(custom_categories), 60)
     tab.ExecuteJavaScript('console.time("' + TIMELINE_MARKER + '")')
     if tab.browser.platform.IsRawDisplayFrameRateSupported():
       tab.browser.platform.StartRawDisplayFrameRateMeasurement()

tools/perf/metrics/smoothness_unittest.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 unittest
+
+from metrics import smoothness
+
+from telemetry.page import page
+
+
+class FakePlatform(object):
+  def IsRawDisplayFrameRateSupported(self):
+    return False
+
+
+class FakeBrowser(object):
+  def __init__(self):
+    self.platform = FakePlatform()
+    self.category_filter = None
+
+  def StartTracing(self, category_filter, _):
+    self.category_filter = category_filter
+
+
+class FakeTab(object):
+  def __init__(self):
+    self.browser = FakeBrowser()
+
+  def ExecuteJavaScript(self, js):
+    pass
+
+
+class SmoothnessMetricUnitTest(unittest.TestCase):
+  def testSyntheticDelayConfiguration(self):
+    attributes = {
+      'synthetic_delays': {
+        'cc.BeginMainFrame': { 'target_duration': 0.012 },
+        'cc.DrawAndSwap': { 'target_duration': 0.012, 'mode': 'alternating' },
+        'gpu.SwapBuffers': { 'target_duration': 0.012 }
+      }
+    }
+    test_page = page.Page('http://dummy', None, attributes=attributes)
+
+    tab = FakeTab()
+    smoothness_metric = smoothness.SmoothnessMetric()
+    smoothness_metric.Start(test_page, tab)
+
+    expected_category_filter = [
+        'DELAY(cc.BeginMainFrame;0.012000;static)',
+        'DELAY(cc.DrawAndSwap;0.012000;alternating)',
+        'DELAY(gpu.SwapBuffers;0.012000;static)',
+        'benchmark',
+        'webkit.console'
+    ]
+    self.assertEquals(expected_category_filter,
+                      sorted(tab.browser.category_filter.split(',')))