| # Copyright 2013 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| import os |
| |
| from telemetry.core import util |
| |
| class SmoothnessMetrics(object): |
| def __init__(self, tab): |
| self._tab = tab |
| with open( |
| os.path.join(os.path.dirname(__file__), |
| 'smoothness.js')) as f: |
| js = f.read() |
| tab.ExecuteJavaScript(js) |
| |
| def Start(self): |
| self._tab.ExecuteJavaScript( |
| 'window.__renderingStats = new __RenderingStats();' |
| 'window.__renderingStats.start()') |
| |
| def SetNeedsDisplayOnAllLayersAndStart(self): |
| self._tab.ExecuteJavaScript( |
| 'chrome.gpuBenchmarking.setNeedsDisplayOnAllLayers();' |
| 'window.__renderingStats = new __RenderingStats();' |
| 'window.__renderingStats.start()') |
| |
| def Stop(self): |
| self._tab.ExecuteJavaScript('window.__renderingStats.stop()') |
| |
| def BindToAction(self, action): |
| # Make the scroll test start and stop measurement automatically. |
| self._tab.ExecuteJavaScript( |
| 'window.__renderingStats = new __RenderingStats();') |
| action.BindMeasurementJavaScript(self._tab, |
| 'window.__renderingStats.start();', |
| 'window.__renderingStats.stop();') |
| |
| @property |
| def start_values(self): |
| return self._tab.EvaluateJavaScript( |
| 'window.__renderingStats.getStartValues()') |
| |
| @property |
| def end_values(self): |
| return self._tab.EvaluateJavaScript( |
| 'window.__renderingStats.getEndValues()') |
| |
| @property |
| def deltas(self): |
| return self._tab.EvaluateJavaScript( |
| 'window.__renderingStats.getDeltas()') |
| |
| |
| def DivideIfPossibleOrZero(numerator, denominator): |
| if denominator == 0: |
| return 0 |
| return numerator / denominator |
| |
| def CalcScrollResults(rendering_stats_deltas, results): |
| num_frames_sent_to_screen = rendering_stats_deltas['numFramesSentToScreen'] |
| |
| mean_frame_time_seconds = ( |
| rendering_stats_deltas['totalTimeInSeconds'] / |
| float(num_frames_sent_to_screen)) |
| |
| dropped_percent = ( |
| rendering_stats_deltas['droppedFrameCount'] / |
| float(num_frames_sent_to_screen)) |
| |
| num_impl_thread_scrolls = rendering_stats_deltas.get( |
| 'numImplThreadScrolls', 0) |
| num_main_thread_scrolls = rendering_stats_deltas.get( |
| 'numMainThreadScrolls', 0) |
| |
| percent_impl_scrolled = DivideIfPossibleOrZero( |
| float(num_impl_thread_scrolls), |
| num_impl_thread_scrolls + num_main_thread_scrolls) |
| |
| num_layers = ( |
| rendering_stats_deltas.get('numLayersDrawn', 0) / |
| float(num_frames_sent_to_screen)) |
| |
| num_missing_tiles = ( |
| rendering_stats_deltas.get('numMissingTiles', 0) / |
| float(num_frames_sent_to_screen)) |
| |
| results.Add('mean_frame_time', 'ms', round(mean_frame_time_seconds * 1000, 3)) |
| results.Add('dropped_percent', '%', round(dropped_percent * 100, 1), |
| data_type='unimportant') |
| results.Add('percent_impl_scrolled', '%', |
| round(percent_impl_scrolled * 100, 1), |
| data_type='unimportant') |
| results.Add('average_num_layers_drawn', '', round(num_layers, 1), |
| data_type='unimportant') |
| results.Add('average_num_missing_tiles', '', round(num_missing_tiles, 1), |
| data_type='unimportant') |
| |
| def CalcTextureUploadResults(rendering_stats_deltas, results): |
| if (('totalCommitCount' not in rendering_stats_deltas) |
| or rendering_stats_deltas['totalCommitCount'] == 0) : |
| averageCommitTimeMs = 0 |
| else : |
| averageCommitTimeMs = ( |
| 1000 * rendering_stats_deltas['totalCommitTimeInSeconds'] / |
| rendering_stats_deltas['totalCommitCount']) |
| |
| results.Add('texture_upload_count', 'count', |
| rendering_stats_deltas.get('textureUploadCount', 0)) |
| results.Add('total_texture_upload_time', 'seconds', |
| rendering_stats_deltas.get('totalTextureUploadTimeInSeconds', 0)) |
| results.Add('average_commit_time', 'ms', averageCommitTimeMs, |
| data_type='unimportant') |
| |
| def CalcFirstPaintTimeResults(results, tab): |
| if tab.browser.is_content_shell: |
| results.Add('first_paint', 'ms', 'unsupported') |
| return |
| |
| tab.ExecuteJavaScript(""" |
| window.__rafFired = false; |
| window.webkitRequestAnimationFrame(function() { |
| window.__rafFired = true; |
| }); |
| """) |
| util.WaitFor(lambda: tab.EvaluateJavaScript('window.__rafFired'), 60) |
| |
| first_paint_secs = tab.EvaluateJavaScript( |
| 'window.chrome.loadTimes().firstPaintTime - ' + |
| 'window.chrome.loadTimes().startLoadTime') |
| |
| results.Add('first_paint', 'ms', round(first_paint_secs * 1000, 1)) |
| |
| def CalcImageDecodingResults(rendering_stats_deltas, results): |
| totalDeferredImageDecodeCount = rendering_stats_deltas.get( |
| 'totalDeferredImageDecodeCount', 0) |
| totalDeferredImageCacheHitCount = rendering_stats_deltas.get( |
| 'totalDeferredImageCacheHitCount', 0) |
| totalImageGatheringCount = rendering_stats_deltas.get( |
| 'totalImageGatheringCount', 0) |
| totalDeferredImageDecodeTimeInSeconds = rendering_stats_deltas.get( |
| 'totalDeferredImageDecodeTimeInSeconds', 0) |
| totalImageGatheringTimeInSeconds = rendering_stats_deltas.get( |
| 'totalImageGatheringTimeInSeconds', 0) |
| |
| averageImageGatheringTime = DivideIfPossibleOrZero( |
| (totalImageGatheringTimeInSeconds * 1000), totalImageGatheringCount) |
| |
| results.Add('total_deferred_image_decode_count', 'count', |
| totalDeferredImageDecodeCount, |
| data_type='unimportant') |
| results.Add('total_image_cache_hit_count', 'count', |
| totalDeferredImageCacheHitCount, |
| data_type='unimportant') |
| results.Add('average_image_gathering_time', 'ms', averageImageGatheringTime, |
| data_type='unimportant') |
| results.Add('total_deferred_image_decoding_time', 'seconds', |
| totalDeferredImageDecodeTimeInSeconds, |
| data_type='unimportant') |
| |
| def CalcAnalysisResults(rendering_stats_deltas, results): |
| totalTilesAnalyzed = rendering_stats_deltas.get( |
| 'totalTilesAnalyzed', 0) |
| solidColorTilesAnalyzed = rendering_stats_deltas.get( |
| 'solidColorTilesAnalyzed', 0) |
| totalTileAnalysisTimeInSeconds = rendering_stats_deltas.get( |
| 'totalTileAnalysisTimeInSeconds', 0) |
| |
| averageAnalysisTimeMS = \ |
| 1000 * DivideIfPossibleOrZero(totalTileAnalysisTimeInSeconds, |
| totalTilesAnalyzed) |
| |
| results.Add('total_tiles_analyzed', 'count', |
| totalTilesAnalyzed, |
| data_type='unimportant') |
| results.Add('solid_color_tiles_analyzed', 'count', |
| solidColorTilesAnalyzed, |
| data_type='unimportant') |
| results.Add('average_tile_analysis_time', 'ms', |
| averageAnalysisTimeMS, |
| data_type='unimportant') |
| |
| def CalcLatency(rendering_stats_deltas, count_name, total_latency_name, |
| result_name, results): |
| eventCount = rendering_stats_deltas.get(count_name, 0) |
| totalLatencyInSeconds = rendering_stats_deltas.get(total_latency_name, 0) |
| averageLatency = DivideIfPossibleOrZero( |
| (totalLatencyInSeconds * 1000), eventCount) |
| results.Add(result_name, 'ms', averageLatency, data_type='unimportant') |
| |
| def CalcLatencyResults(rendering_stats_deltas, results): |
| CalcLatency(rendering_stats_deltas, 'inputEventCount', 'totalInputLatency', |
| 'average_latency', results) |
| CalcLatency(rendering_stats_deltas, 'touchUICount', 'totalTouchUILatency', |
| 'average_touch_ui_latency', results) |
| CalcLatency(rendering_stats_deltas, 'touchAckedCount', |
| 'totalTouchAckedLatency', |
| 'average_touch_acked_latency', |
| results) |
| CalcLatency(rendering_stats_deltas, 'scrollUpdateCount', |
| 'totalScrollUpdateLatency', |
| 'average_scroll_update_latency', results) |
