Telemetry: Quiescent power benchmarks for Mac

Add benchmark and measurement for measuring quiescent power, and enable
it on Mac.
Moved the workaround for http://crbug.com/419786 so that we don't lose idle
wakeups numbers for the renderer process.

Review URL: https://codereview.chromium.org/1092393002

Cr-Commit-Position: refs/heads/master@{#326698}

tools/perf/benchmarks/power.py

@@ -18,7 +18,6 @@ class PowerAndroidAcceptance(benchmark.Benchmark):
     return 'power.android_acceptance'
 
 
-
 @benchmark.Enabled('android')
 class PowerTypical10Mobile(benchmark.Benchmark):
   """Android typical 10 mobile power test."""
@@ -29,3 +28,21 @@ class PowerTypical10Mobile(benchmark.Benchmark):
     return 'power.typical_10_mobile'
 
 
+@benchmark.Enabled('mac')
+class PowerTop10(benchmark.Benchmark):
+  """Top 10 quiescent power test."""
+  test = power.QuiescentPower
+  page_set = page_sets.Top10PageSet
+  @classmethod
+  def Name(cls):
+    return 'power.top_10'
+
+
+@benchmark.Enabled('mac')
+class PowerTop25(benchmark.Benchmark):
+  """Top 25 quiescent power test."""
+  test = power.QuiescentPower
+  page_set = page_sets.Top25PageSet
+  @classmethod
+  def Name(cls):
+    return 'power.top_25'

tools/perf/measurements/page_cycler_unittest.py

@@ -227,7 +227,7 @@ class PageCyclerUnitTest(unittest.TestCase):
 
         # On Mac, there is an additional measurement: the number of keychain
         # accesses.
-        value_count = 4
+        value_count = 3
         if sys.platform == 'darwin':
           value_count += 1
         self.assertEqual(value_count, len(values))
@@ -237,7 +237,7 @@ class PageCyclerUnitTest(unittest.TestCase):
         self.assertEqual(values[0].name, '%s.page_load_time' % chart_name)
         self.assertEqual(values[0].units, 'ms')
 
-        expected_values = ['gpu', 'renderer', 'browser']
+        expected_values = ['gpu', 'browser']
         for value, expected in zip(values[1:len(expected_values) + 1],
             expected_values):
           self.assertEqual(value.page, page)

tools/perf/measurements/power.py

@@ -2,13 +2,17 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-from telemetry.page import page_test
+import time
 
 from metrics import network
 from metrics import power
+from telemetry.core import util
+from telemetry.page import page_test
 
 
 class Power(page_test.PageTest):
+  """Measures power draw and idle wakeups during the page's interactions."""
+
   def __init__(self):
     super(Power, self).__init__()
     self._power_metric = None
@@ -29,3 +33,24 @@ class Power(page_test.PageTest):
     self._power_metric.Stop(page, tab)
     self._network_metric.AddResults(tab, results)
     self._power_metric.AddResults(tab, results)
+
+
+class QuiescentPower(page_test.PageTest):
+  """Measures power draw and idle wakeups after the page finished loading."""
+
+  # Amount of time to measure, in seconds.
+  SAMPLE_TIME = 30
+
+  def ValidateAndMeasurePage(self, page, tab, results):
+    if not tab.browser.platform.CanMonitorPower():
+      return
+
+    util.WaitFor(tab.HasReachedQuiescence, 60)
+
+    metric = power.PowerMetric(tab.browser.platform)
+    metric.Start(page, tab)
+
+    time.sleep(QuiescentPower.SAMPLE_TIME)
+
+    metric.Stop(page, tab)
+    metric.AddResults(tab, results)

tools/perf/metrics/cpu.py

@@ -32,6 +32,12 @@ class CpuMetric(Metric):
   def AddResults(self, tab, results, trace_name='cpu_utilization'):
     assert self._stop_cpu, 'Must call Stop() first'
     cpu_stats = _SubtractCpuStats(self._stop_cpu, self._start_cpu)
+
+    # FIXME: Renderer process CPU times are impossible to compare correctly.
+    # http://crbug.com/419786#c11
+    if 'Renderer' in cpu_stats:
+      del cpu_stats['Renderer']
+
     # Add a result for each process type.
     for process_type in cpu_stats:
       trace_name_for_process = '%s_%s' % (trace_name, process_type.lower())

tools/telemetry/telemetry/core/browser.py

@@ -205,11 +205,6 @@ class Browser(app.App):
     result = self._GetStatsCommon(self._platform_backend.GetCpuStats)
     del result['ProcessCount']
 
-    # FIXME: Renderer process CPU times are impossible to compare correctly.
-    # http://crbug.com/419786#c11
-    if 'Renderer' in result:
-      del result['Renderer']
-
     # We want a single time value, not the sum for all processes.
     cpu_timestamp = self._platform_backend.GetCpuTimestamp()
     for process_type in result: