def _GetMaxDetachedContextAge(tab, data_start):
data = histogram_util.GetHistogram(_TYPE, _NAME, tab)
delta = histogram_util.SubtractHistogram(data, data_start)
if not 'buckets' in delta:
return
buckets = json.loads(delta)['buckets']
if buckets:
return max(x.get('high', x['low']) for x in buckets)
def _IsDone():
cur_histogram = _GetTabSwitchHistogram(browser)
if not cur_histogram:
return False
diff_histogram = histogram_util.SubtractHistogram(
cur_histogram, prev_histogram)
diff_histogram_count = json.loads(diff_histogram).get('count', 0)
return diff_histogram_count > 0
def _IsDone():
# pylint: disable=W0640
cur_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab_to_switch)
diff_histogram = histogram_util.SubtractHistogram(
cur_histogram, prev_histogram)
# TODO(deanliao): Add SubtractHistogramRawValue to process histogram
# object instead of JSON string.
diff_histogram_count = json.loads(diff_histogram).get('count', 0)
return diff_histogram_count > 0
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."""
browser = tab.browser
if len(browser.tabs) != len(page.story_set.stories):
return
if browser.tabs < 2:
raise Exception('Should have at least two tabs for tab switching')
# Measure power usage of tabs after quiescence.
util.WaitFor(tab.HasReachedQuiescence, 60)
if 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 tab_to_switch in browser.tabs:
tab_to_switch.Activate()
def _IsDone():
# pylint: disable=W0640
cur_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab_to_switch)
diff_histogram = histogram_util.SubtractHistogram(
cur_histogram, prev_histogram)
# TODO(deanliao): Add SubtractHistogramRawValue to process histogram
# object instead of JSON string.
diff_histogram_count = json.loads(diff_histogram).get('count', 0)
return diff_histogram_count > 0
util.WaitFor(_IsDone, 30)
# We need to get histogram again instead of getting cur_histogram as
# variables modified inside inner function cannot be retrieved. However,
# inner function can see external scope's variables.
prev_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab_to_switch)
last_histogram = prev_histogram
total_diff_histogram = histogram_util.SubtractHistogram(last_histogram,
first_histogram)
results.AddSummaryValue(
histogram.HistogramValue(None, display_name, 'ms',
raw_value_json=total_diff_histogram,
important=False))
keychain_metric.KeychainMetric().AddResults(tab, results)
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,
'ms',
raw_value_json=diff_histogram,
important=False))
keychain_metric.KeychainMetric().AddResults(tab, results)
def Stop(self, page, tab):
assert self._started, 'Must call Start() first'
for h in HISTOGRAMS_TO_RECORD:
# 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)
if not histogram_data:
continue
self._histogram_delta[h['name']] = histogram_util.SubtractHistogram(
histogram_data, self._histogram_start[h['name']])
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))
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 testSubtractHistogram(self):
baseline_histogram = """{"count": 3, "buckets": [
{"low": 1, "high": 2, "count": 1},
{"low": 2, "high": 3, "count": 2}]}"""
later_histogram = """{"count": 14, "buckets": [
{"low": 1, "high": 2, "count": 1},
{"low": 2, "high": 3, "count": 3},
{"low": 3, "high": 4, "count": 10}]}"""
new_histogram = json.loads(
histogram_util.SubtractHistogram(later_histogram, baseline_histogram))
new_buckets = dict()
for b in new_histogram['buckets']:
new_buckets[b['low']] = b['count']
self.assertFalse(1 in new_buckets)
self.assertEquals(1, new_buckets[2])
self.assertEquals(10, new_buckets[3])
def _IsDone():
cur_histogram = histogram_util.GetHistogram(
histogram_type, histogram_name, tab)
diff_histogram = histogram_util.SubtractHistogram(
cur_histogram, prev_histogram)
return diff_histogram
