Index: tools/perf/contrib/cros_benchmarks/tab_switching_measure.py |
diff --git a/tools/perf/contrib/cros_benchmarks/tab_switching_measure.py b/tools/perf/contrib/cros_benchmarks/tab_switching_measure.py |
new file mode 100644 |
index 0000000000000000000000000000000000000000..8ca8a9e3f55fe31614dfb576cbcdebcd5e97a2a3 |
--- /dev/null |
+++ b/tools/perf/contrib/cros_benchmarks/tab_switching_measure.py |
@@ -0,0 +1,44 @@ |
+# Copyright 2017 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. |
+ |
+"""The tab switching measurement. |
+ |
+This measurement record the MPArch.RWH_TabSwitchPaintDuration histogram |
+of each tab swithcing. |
+""" |
+ |
+from telemetry.page import legacy_page_test |
+from telemetry.value import histogram |
+from telemetry.value import histogram_util |
+ |
+from contrib.cros_benchmarks import cros_utils |
+ |
+ |
+class CrosTabSwitchingMeasurement(legacy_page_test.LegacyPageTest): |
+ """Measures tab switching performance.""" |
+ |
+ def __init__(self): |
+ super(CrosTabSwitchingMeasurement, self).__init__() |
+ self._first_histogram = None |
+ |
+ def CustomizeBrowserOptions(self, options): |
+ """Adding necessary browser flag to collect histogram.""" |
+ options.AppendExtraBrowserArgs(['--enable-stats-collection-bindings']) |
+ |
+ def DidNavigateToPage(self, page, tab): |
+ """Record the starting histogram.""" |
+ self._first_histogram = cros_utils.GetTabSwitchHistogramRetry(tab.browser) |
+ |
+ def ValidateAndMeasurePage(self, page, tab, results): |
+ """Record the ending histogram for the tab switching metric.""" |
+ last_histogram = cros_utils.GetTabSwitchHistogramRetry(tab.browser) |
+ total_diff_histogram = histogram_util.SubtractHistogram( |
+ last_histogram, self._first_histogram) |
+ |
+ display_name = 'MPArch_RWH_TabSwitchPaintDuration' |
+ results.AddSummaryValue( |
+ histogram.HistogramValue( |
+ None, display_name, 'ms', |
+ raw_value_json=total_diff_histogram, |
+ important=False)) |