118 lines
4.2 KiB
Python
118 lines
4.2 KiB
Python
# Copyright 2015 The Chromium OS 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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import hashlib, logging, os, time
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from autotest_lib.client.bin import test
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from autotest_lib.client.common_lib import error, file_utils
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from autotest_lib.client.common_lib.cros import chrome
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from autotest_lib.client.cros import service_stopper
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from autotest_lib.client.cros.power import power_status, power_utils
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_DOWNLOAD_BASE = ('http://commondatastorage.googleapis.com/'
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'chromiumos-test-assets-public/audio_power/')
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# Minimum battery charge percentage to run the test
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BATTERY_INITIAL_CHARGED_MIN = 10
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# Measurement duration in seconds.
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MEASUREMENT_DURATION = 150
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POWER_DESCRIPTION = 'avg_energy_rate_'
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# Time to exclude from calculation after playing audio [seconds].
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STABILIZATION_DURATION = 10
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class audio_PlaybackPower(test.test):
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"""Captures power usage for audio playback."""
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version = 1
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def initialize(self):
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self._service_stopper = None
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self._backlight = None
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def run_power_test(self, audio_type):
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"""
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Captures power usage and reports it to the perf dashboard.
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@param audio_type: audio format label to attach with perf keyval.
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"""
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self._backlight = power_utils.Backlight()
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self._backlight.set_default()
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self._service_stopper = service_stopper.ServiceStopper(
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service_stopper.ServiceStopper.POWER_DRAW_SERVICES)
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self._service_stopper.stop_services()
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self._power_status = power_status.get_status()
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# Verify that we are running on battery and the battery is sufficiently
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# charged.
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self._power_status.assert_battery_state(BATTERY_INITIAL_CHARGED_MIN)
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measurements = [power_status.SystemPower(
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self._power_status.battery_path)]
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def get_power():
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power_logger = power_status.PowerLogger(measurements)
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power_logger.start()
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time.sleep(STABILIZATION_DURATION)
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start_time = time.time()
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time.sleep(MEASUREMENT_DURATION)
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power_logger.checkpoint('result', start_time)
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keyval = power_logger.calc()
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logging.info('Power output %s', keyval)
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return keyval['result_' + measurements[0].domain + '_pwr_avg']
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energy_rate = get_power()
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perf_keyval = {}
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perf_keyval[POWER_DESCRIPTION + audio_type] = energy_rate
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self.output_perf_value(description=POWER_DESCRIPTION + audio_type,
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value=energy_rate, units='W',
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higher_is_better=False)
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self.write_perf_keyval(perf_keyval)
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def run_once(self, test_file, checksum):
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local_path = os.path.join(self.bindir, '%s' % test_file)
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file_utils.download_file(_DOWNLOAD_BASE + test_file, local_path)
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logging.info('Downloaded file: %s. Expected checksum: %s',
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local_path, checksum)
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with open(local_path, 'r') as r:
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md5sum = hashlib.md5(r.read()).hexdigest()
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if md5sum != checksum:
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raise error.TestError('unmatched md5 sum: %s' % md5sum)
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with chrome.Chrome(init_network_controller=True) as cr:
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cr.browser.platform.SetHTTPServerDirectories(self.bindir)
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url = cr.browser.platform.http_server.UrlOf(local_path)
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self.play_audio(cr.browser.tabs[0], url)
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self.run_power_test(url.split('.')[-1])
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def play_audio(self, tab, url):
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"""Navigates to an audio file over http and plays it in loop.
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@param tab: tab to open an audio stream.
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@param url: audio/video test url.
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"""
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tab.Navigate(url)
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tab.ExecuteJavaScript(
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"document.getElementsByTagName('video')[0].loop=true")
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tab.ExecuteJavaScript(
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"document.getElementsByTagName('video')[0].volume=1")
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def cleanup(self):
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# cleanup() is run by common_lib/test.py.
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if self._backlight:
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self._backlight.restore()
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if self._service_stopper:
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self._service_stopper.restore_services()
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super(audio_PlaybackPower, self).cleanup()
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