| # Copyright (c) 2014 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| from contextlib import closing |
| import logging |
| import os |
| import re |
| import time |
| import urllib2 |
| |
| from autotest_lib.client.bin import test, utils |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.client.common_lib.cros import chrome |
| from autotest_lib.client.cros import power_status, power_utils |
| from autotest_lib.client.cros import service_stopper |
| |
| |
| DISABLE_ACCELERATED_VIDEO_DECODE_BROWSER_ARGS = [ |
| '--disable-accelerated-video-decode'] |
| DOWNLOAD_BASE = 'http://commondatastorage.googleapis.com/chromeos-test-public/big_buck_bunny/' |
| |
| GPU_VIDEO_INIT_HISTOGRAM = 'Media.GpuVideoDecoderInitializeStatus' |
| HISTOGRAMS_URL = 'chrome://histograms/' + GPU_VIDEO_INIT_HISTOGRAM |
| |
| # Minimum battery charge percentage we prefer to run the test |
| BATTERY_INITIAL_CHARGED_MIN = 10 |
| |
| PLAYBACK_WITH_HW_ACCELERATION = 'playback_with_hw_acceleration' |
| PLAYBACK_WITHOUT_HW_ACCELERATION = 'playback_without_hw_acceleration' |
| |
| # Measure duration in seconds |
| MEASURE_DURATION = 20 |
| # Time to exclude from calculation after firing a task [seconds]. |
| STABILIZATION_DURATION = 5 |
| |
| # The status code indicating GpuVideoDecoder::Initialize() has succeeded. |
| GPU_VIDEO_INIT_BUCKET = 0 |
| |
| class video_PlaybackPower(test.test): |
| """ |
| The test outputs the power consumption for video playback to |
| performance dashboard. |
| """ |
| version = 1 |
| |
| |
| def initialize(self): |
| # Objects that need to be taken care of in cleanup() are initialized |
| # here. Otherwise we run the risk of AttributeError raised in |
| # cleanup() masking a real error that caused the test to fail during |
| # initialize() before those variables were assigned. |
| self._backlight = power_utils.Backlight() |
| self._backlight.set_default() |
| |
| self._services = service_stopper.ServiceStopper( |
| service_stopper.ServiceStopper.POWER_DRAW_SERVICES) |
| self._services.stop_services() |
| |
| self._power_status = power_status.get_status() |
| # Verify that we are running on battery and the battery is |
| # sufficiently charged. |
| self._power_status.assert_battery_state(BATTERY_INITIAL_CHARGED_MIN) |
| |
| |
| def start_playback(self, cr, local_path): |
| """ |
| Opens the video and plays it. |
| |
| @param cr: Autotest Chrome instance. |
| @param local_path: path to the local video file to play |
| """ |
| tab = cr.browser.tabs[0] |
| tab.Navigate(cr.browser.http_server.UrlOf(local_path)) |
| tab.WaitForDocumentReadyStateToBeComplete() |
| |
| |
| def is_hardware_accelerated(self, cr): |
| """ |
| Checks if video decoding is hardware accelerated. |
| |
| @param cr: Autotest Chrome instance. |
| @return True if it is using hardware acceleration, False otherwise. |
| """ |
| result = False |
| tab = cr.browser.tabs.New() |
| def histograms_loaded(): |
| """Returns true if histogram is loaded.""" |
| tab.Navigate(HISTOGRAMS_URL) |
| tab.WaitForDocumentReadyStateToBeComplete() |
| return tab.EvaluateJavaScript( |
| 'document.documentElement.innerText.search("%s") != -1' |
| % GPU_VIDEO_INIT_HISTOGRAM) |
| |
| def histogram_success(): |
| """Returns true if GpuVideoDecoder::Initialize() has succeeded.""" |
| lines = tab.EvaluateJavaScript('document.documentElement.innerText') |
| # Example of the expected string to match: |
| # 0 --------------------------O (1 = 100.0%) |
| re_string = '^'+ str(GPU_VIDEO_INIT_BUCKET) +'\s\s-.*100\.0%.*' |
| return re.search(re_string, lines, re.MULTILINE) != None |
| |
| try: |
| utils.poll_for_condition( |
| histograms_loaded, |
| timeout=5, |
| exception=error.TestError( |
| 'Cannot find gpu video decoder histogram.'), |
| sleep_interval=1) |
| except error.TestError: |
| result = False |
| else: |
| result = histogram_success() |
| |
| tab.Close() |
| return result |
| |
| |
| def run_once(self, video_name, video_format): |
| # Download test video. |
| url = DOWNLOAD_BASE + video_name |
| local_path = os.path.join(self.bindir, video_name) |
| self.download_file(url, local_path) |
| |
| measurements = [power_status.SystemPower( |
| self._power_status.battery_path)] |
| self._power_logger = power_status.PowerLogger(measurements) |
| self._power_logger.start() |
| |
| # Run the video playback tests. |
| self.test_playback(local_path) |
| |
| keyvals = self._power_logger.calc() |
| |
| # Find the energy of full battery |
| self.energy_full_design = (self._power_status.battery[0]. |
| energy_full_design) |
| logging.info("energy_full_design = %0.3f Wh", |
| self.energy_full_design) |
| |
| measurement_type = '_' + measurements[0].domain + '_pwr' |
| |
| energy_rate_with_hw = keyvals.get(PLAYBACK_WITH_HW_ACCELERATION + |
| measurement_type) |
| if energy_rate_with_hw: |
| self.output_perf_value( |
| description= 'hw_' + video_format + |
| '_video_energy_rate.mean', |
| value=energy_rate_with_hw, |
| units='W', higher_is_better=False) |
| |
| logging.info('Expected battery life of playing the video with ' |
| 'hardware acceleration : %0.3f hours', |
| self.energy_full_design / energy_rate_with_hw) |
| |
| energy_rate_without_hw = keyvals[PLAYBACK_WITHOUT_HW_ACCELERATION + |
| measurement_type] |
| self.output_perf_value( |
| description= 'sw_' + video_format + '_video_energy_rate.mean', |
| value=energy_rate_without_hw, |
| units='W', higher_is_better=False) |
| logging.info('Expected battery life of playing the video without ' |
| 'hardware acceleration : %0.3f hours', |
| self.energy_full_design / energy_rate_without_hw) |
| |
| # Save the results to the autotest results directory |
| self._power_logger.save_results(self.resultsdir) |
| |
| |
| def test_playback(self, local_path): |
| """ |
| Runs the video playback test with and without hardware acceleration. |
| |
| @param local_path: the path to the video file. |
| """ |
| with chrome.Chrome() as cr: |
| # Open video playback page. |
| cr.browser.SetHTTPServerDirectories(self.bindir) |
| self.start_playback(cr, local_path) |
| |
| # Record the start time and the end time of this power |
| # measurement test run. |
| time.sleep(STABILIZATION_DURATION) |
| start_time = time.time() |
| time.sleep(MEASURE_DURATION) |
| end_time = time.time() |
| |
| # Check if decode is hardware accelerated. |
| if self.is_hardware_accelerated(cr): |
| self._power_logger.checkpoint(PLAYBACK_WITH_HW_ACCELERATION, |
| start_time, end_time) |
| else: |
| logging.info("Can not use hardware decoding") |
| self._power_logger.checkpoint(PLAYBACK_WITHOUT_HW_ACCELERATION, |
| start_time, end_time) |
| return |
| |
| # Start chrome with test flag |
| # and disabled video hardware decode flag. |
| with chrome.Chrome(extra_browser_args= |
| DISABLE_ACCELERATED_VIDEO_DECODE_BROWSER_ARGS) as cr: |
| |
| # Open video playback page. |
| cr.browser.SetHTTPServerDirectories(self.bindir) |
| self.start_playback(cr, local_path) |
| |
| # Record the start time and the end time of this power |
| # measurement test run. |
| time.sleep(STABILIZATION_DURATION) |
| start_time = time.time() |
| time.sleep(MEASURE_DURATION) |
| self._power_logger.checkpoint(PLAYBACK_WITHOUT_HW_ACCELERATION, |
| start_time) |
| # Make sure decode is not hardware accelerated. |
| if self.is_hardware_accelerated(cr): |
| raise error.TestError( |
| 'Video decode acceleration should not be working.') |
| |
| |
| def download_file(self, url, local_path): |
| """ |
| Downloads a file from the specified URL. |
| |
| @param url: URL of the file. |
| @param local_path: the path that the file will be saved to. |
| """ |
| logging.info('Downloading "%s" to "%s"', url, local_path) |
| with closing(urllib2.urlopen(url)) as r, open(local_path, 'wb') as w: |
| w.write(r.read()) |
| |
| |
| def cleanup(self): |
| # cleanup() is run by common_lib/test.py. |
| if self._backlight: |
| self._backlight.restore() |
| if self._services: |
| self._services.restore_services() |
| |
| super(video_PlaybackPower, self).cleanup() |
