Adds four benchmarks to measure v8 runtime + GC metrics on browsing story set.

tools/perf/benchmarks/v8_browsing.py

Index: tools/perf/benchmarks/v8_browsing.py
diff --git a/tools/perf/benchmarks/v8_browsing.py b/tools/perf/benchmarks/v8_browsing.py
index 6f2f08b5f624488581d2508760fee0b13dc6659f..8ab6838ff070449aec9705c58e2e8e0eea256213 100644
--- a/tools/perf/benchmarks/v8_browsing.py
+++ b/tools/perf/benchmarks/v8_browsing.py
@@ -85,6 +85,37 @@ class _V8BrowsingBenchmark(perf_benchmark.PerfBenchmark):
   def ShouldTearDownStateAfterEachStoryRun(cls):
     return True
 
+class _V8RuntimeStatsBrowsingBenchmark(perf_benchmark.PerfBenchmark):
+  """Base class for V8 browsing benchmarks that measure RuntimeStats.
+  RuntimeStats measure the time spent by v8 in different phases like
+  compile, JS execute, runtime etc.,
+  See browsing_stories._BrowsingStory for workload description.
+  """
+
+  def CreateTimelineBasedMeasurementOptions(self):
+    cat_filter = chrome_trace_category_filter.ChromeTraceCategoryFilter()
+
+    # V8 needed categories
+    cat_filter.AddIncludedCategory('v8')
+    cat_filter.AddDisabledByDefault('disabled-by-default-v8.runtime_stats')
+
+    tbm_options = timeline_based_measurement.Options(
+        overhead_level=cat_filter)
+    tbm_options.SetTimelineBasedMetrics(['runtimeStatsInteractiveMetric'])

[Camillo Bruni, 2017/01/19 19:08:23]

This should now be runtimeStatsTotalMetric, no?

Also, I think it would make sense to also add the runtimeStatsMetric, even
though we focus on browsing, we are still interested in startup?
I'd be also interested in seeing what the ratio between the startup and total
metric is going to be.

+    return tbm_options
+
+
+  def CreateStorySet(self, options):
+    return page_sets.SystemHealthStorySet(platform=self.PLATFORM, case='browse')
+
+  @classmethod
+  def Name(cls):
+    return 'v8.runtimestats.browsing_%s%s' % (cls.PLATFORM, cls.TEST_SUFFIX)
+
+  @classmethod
+  def ShouldTearDownStateAfterEachStoryRun(cls):
+    return True
+
 
 class _V8DesktopBrowsingBenchmark(_V8BrowsingBenchmark):
 
@@ -155,4 +186,22 @@ class V8MobileTurboBrowsingBenchmark(_V8MobileBrowsingBenchmark):
   def SetExtraBrowserOptions(self, options):
     super(V8MobileTurboBrowsingBenchmark, self).SetExtraBrowserOptions(
         options)
+
+
+@benchmark.Disabled('android') # http://crbug.com/682167
+class V8RuntimeStatsDesktopBrowsingBenchmark(
+    _V8RuntimeStatsBrowsingBenchmark):
+  PLATFORM = 'desktop'
+  TEST_SUFFIX = ''
+
+
+@benchmark.Disabled('android') # http://crbug.com/682167
+class V8RuntimeStatsDesktopTurboBrowsingBenchmark(
+    _V8RuntimeStatsBrowsingBenchmark):
+  PLATFORM = 'desktop'
+  TEST_SUFFIX = '_turbo'
+
+  def SetExtraBrowserOptions(self, options):
+    super(V8RuntimeStatsDesktopTurboBrowsingBenchmark,
+        self).SetExtraBrowserOptions(options)
     v8_helper.EnableTurbo(options)