def ValidateAndMeasurePage(self, page, tab, results):
"""On the last tab, cycle through each tab that was opened and then record
a single histogram for the tab switching metric."""
if len(tab.browser.tabs) != len(page.page_set.pages):
return
# Measure power usage of tabs after quiescence.
util.WaitFor(tab.HasReachedQuiescence, 60)
if tab.browser.platform.CanMonitorPower():
self._power_metric.Start(page, tab)
time.sleep(TabSwitching.SAMPLE_TIME)
self._power_metric.Stop(page, tab)
self._power_metric.AddResults(
tab,
results,
)
histogram_name = 'MPArch.RWH_TabSwitchPaintDuration'
histogram_type = histogram_util.BROWSER_HISTOGRAM
display_name = 'MPArch_RWH_TabSwitchPaintDuration'
first_histogram = histogram_util.GetHistogram(histogram_type,
histogram_name, tab)
prev_histogram = first_histogram
for i in xrange(len(tab.browser.tabs)):
t = tab.browser.tabs[i]
t.Activate()
def _IsDone():
cur_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab)
diff_histogram = histogram_util.SubtractHistogram(
cur_histogram, prev_histogram)
return diff_histogram
util.WaitFor(_IsDone, 30)
prev_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab)
last_histogram = histogram_util.GetHistogram(histogram_type,
histogram_name, tab)
diff_histogram = histogram_util.SubtractHistogram(
last_histogram, first_histogram)
results.AddSummaryValue(
histogram.HistogramValue(None,
display_name,
'',
raw_value_json=diff_histogram,
important=False))
def MeasurePage(self, page, tab, results):
"""On the last tab, cycle through each tab that was opened and then record
a single histogram for the tab switching metric."""
if len(tab.browser.tabs) != len(page.page_set.pages):
return
self._cpu_metric.Start(page, tab)
time.sleep(.5)
self._cpu_metric.Stop(page, tab)
# Calculate the idle cpu load before any actions are done.
self._cpu_metric.AddResults(tab, results, 'idle_cpu_utilization')
histogram_name = 'MPArch.RWH_TabSwitchPaintDuration'
histogram_type = histogram_util.BROWSER_HISTOGRAM
first_histogram = histogram_util.GetHistogram(histogram_type,
histogram_name, tab)
prev_histogram = first_histogram
for i in xrange(len(tab.browser.tabs)):
t = tab.browser.tabs[i]
t.Activate()
def _IsDone():
cur_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab)
diff_histogram = histogram_util.SubtractHistogram(
cur_histogram, prev_histogram)
return diff_histogram
util.WaitFor(_IsDone, 30)
prev_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab)
last_histogram = histogram_util.GetHistogram(histogram_type,
histogram_name, tab)
diff_histogram = histogram_util.SubtractHistogram(
last_histogram, first_histogram)
results.AddSummary(histogram_name,
'',
diff_histogram,
data_type='unimportant-histogram')
def Start(self, page, tab):
"""Start the per-page preparation for this metric.
Here, this consists of recording the start value of all the histograms.
"""
for h in _HISTOGRAMS:
histogram_data = histogram_util.GetHistogram(
h['type'], h['name'], tab)
# Histogram data may not be available
if not histogram_data:
continue
self._histogram_start[h['name']] = histogram_data
def Stop(self, page, tab):
"""Prepare the results for this page.
The results are the differences between the current histogram values
and the values when Start() was called.
"""
assert self._histogram_start, 'Must call Start() first'
for h in _HISTOGRAMS:
# Histogram data may not be available
if h['name'] not in self._histogram_start:
continue
histogram_data = histogram_util.GetHistogram(
h['type'], h['name'], tab)
self._histogram_delta[h['name']] = histogram_util.SubtractHistogram(
histogram_data, self._histogram_start[h['name']])
def _IsDone():
cur_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab)
diff_histogram = histogram_util.SubtractHistogram(
cur_histogram, prev_histogram)
return diff_histogram