105 lines
3.8 KiB
Python
105 lines
3.8 KiB
Python
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# Copyright (c) 2012 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""The page cycler measurement.
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This measurement registers a window load handler in which is forces a layout and
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then records the value of performance.now(). This call to now() measures the
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time from navigationStart (immediately after the previous page's beforeunload
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event) until after the layout in the page's load event. In addition, two garbage
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collections are performed in between the page loads (in the beforeunload event).
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This extra garbage collection time is not included in the measurement times.
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Finally, various memory and IO statistics are gathered at the very end of
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cycling all pages.
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"""
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import os
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import sys
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from metrics import histogram
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from metrics import io
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from metrics import memory
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from telemetry.core import util
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from telemetry.page import page_measurement
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MEMORY_HISTOGRAMS = [
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{'name': 'V8.MemoryExternalFragmentationTotal', 'units': 'percent'},
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{'name': 'V8.MemoryHeapSampleTotalCommitted', 'units': 'kb'},
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{'name': 'V8.MemoryHeapSampleTotalUsed', 'units': 'kb'}]
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class PageCycler(page_measurement.PageMeasurement):
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def __init__(self, *args, **kwargs):
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super(PageCycler, self).__init__(*args, **kwargs)
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with open(os.path.join(os.path.dirname(__file__),
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'page_cycler.js'), 'r') as f:
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self._page_cycler_js = f.read()
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self._memory_metric = None
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self._histograms = None
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def AddCommandLineOptions(self, parser):
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# The page cyclers should default to 10 iterations. In order to change the
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# default of an option, we must remove and re-add it.
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# TODO: Remove this after transition to run_benchmark.
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pageset_repeat_option = parser.get_option('--pageset-repeat')
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pageset_repeat_option.default = 10
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parser.remove_option('--pageset-repeat')
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parser.add_option(pageset_repeat_option)
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def DidStartBrowser(self, browser):
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"""Initialize metrics once right after the browser has been launched."""
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self._memory_metric = memory.MemoryMetric(browser)
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self._memory_metric.Start()
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self._histograms = [histogram.HistogramMetric(
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h, histogram.RENDERER_HISTOGRAM)
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for h in MEMORY_HISTOGRAMS]
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def DidStartHTTPServer(self, tab):
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# Avoid paying for a cross-renderer navigation on the first page on legacy
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# page cyclers which use the filesystem.
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tab.Navigate(tab.browser.http_server.UrlOf('nonexistent.html'))
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def WillNavigateToPage(self, page, tab):
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page.script_to_evaluate_on_commit = self._page_cycler_js
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def DidNavigateToPage(self, page, tab):
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for h in self._histograms:
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h.Start(page, tab)
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def CustomizeBrowserOptions(self, options):
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options.AppendExtraBrowserArg('--enable-stats-collection-bindings')
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options.AppendExtraBrowserArg('--js-flags=--expose_gc')
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options.AppendExtraBrowserArg('--no-sandbox')
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# Old commandline flags used for reference builds.
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options.AppendExtraBrowserArg('--dom-automation')
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# Temporarily disable typical_25 page set on mac.
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if sys.platform == 'darwin' and sys.argv[-1].endswith('/typical_25.json'):
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print 'typical_25 is currently disabled on mac. Skipping test.'
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sys.exit(0)
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def MeasurePage(self, page, tab, results):
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def _IsDone():
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return bool(tab.EvaluateJavaScript('__pc_load_time'))
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util.WaitFor(_IsDone, 60)
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for h in self._histograms:
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h.GetValue(page, tab, results)
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results.Add('page_load_time', 'ms',
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int(float(tab.EvaluateJavaScript('__pc_load_time'))),
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chart_name='times')
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def DidRunTest(self, tab, results):
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self._memory_metric.Stop()
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self._memory_metric.AddResults(tab, results)
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io.IOMetric().AddSummaryResults(tab, results)
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