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1 # Copyright 2013 The Chromium Authors. All rights reserved. | 1 # Copyright 2013 The Chromium Authors. All rights reserved. |
2 # Use of this source code is governed by a BSD-style license that can be | 2 # Use of this source code is governed by a BSD-style license that can be |
3 # found in the LICENSE file. | 3 # found in the LICENSE file. |
4 | 4 |
5 from metrics import Metric | 5 from metrics import Metric |
6 from metrics import rendering_stats | 6 from metrics import rendering_stats |
7 from metrics import statistics | |
8 from telemetry.page import page_measurement | 7 from telemetry.page import page_measurement |
9 from telemetry.page.perf_tests_helper import FlattenList | 8 from telemetry.page.perf_tests_helper import FlattenList |
10 from telemetry.core.timeline.model import TimelineModel | 9 from telemetry.core.timeline.model import TimelineModel |
| 10 from telemetry.util import statistics |
11 | 11 |
12 TIMELINE_MARKER = 'Smoothness' | 12 TIMELINE_MARKER = 'Smoothness' |
13 | 13 |
14 | 14 |
15 class MissingDisplayFrameRateError(page_measurement.MeasurementFailure): | 15 class MissingDisplayFrameRateError(page_measurement.MeasurementFailure): |
16 def __init__(self, name): | 16 def __init__(self, name): |
17 super(MissingDisplayFrameRateError, self).__init__( | 17 super(MissingDisplayFrameRateError, self).__init__( |
18 'Missing display frame rate metrics: ' + name) | 18 'Missing display frame rate metrics: ' + name) |
19 | 19 |
20 class NotEnoughFramesError(page_measurement.MeasurementFailure): | 20 class NotEnoughFramesError(page_measurement.MeasurementFailure): |
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69 renderer_process = timeline_model.GetRendererProcessFromTab(tab) | 69 renderer_process = timeline_model.GetRendererProcessFromTab(tab) |
70 self._stats = rendering_stats.RenderingStats( | 70 self._stats = rendering_stats.RenderingStats( |
71 renderer_process, timeline_model.browser_process, timeline_ranges) | 71 renderer_process, timeline_model.browser_process, timeline_ranges) |
72 | 72 |
73 if not self._stats.frame_times: | 73 if not self._stats.frame_times: |
74 raise NotEnoughFramesError() | 74 raise NotEnoughFramesError() |
75 | 75 |
76 def AddResults(self, tab, results): | 76 def AddResults(self, tab, results): |
77 if self._stats.mouse_wheel_scroll_latency: | 77 if self._stats.mouse_wheel_scroll_latency: |
78 mean_mouse_wheel_scroll_latency = statistics.ArithmeticMean( | 78 mean_mouse_wheel_scroll_latency = statistics.ArithmeticMean( |
79 self._stats.mouse_wheel_scroll_latency, | 79 self._stats.mouse_wheel_scroll_latency) |
80 len(self._stats.mouse_wheel_scroll_latency)) | |
81 mouse_wheel_scroll_latency_discrepancy = statistics.DurationsDiscrepancy( | 80 mouse_wheel_scroll_latency_discrepancy = statistics.DurationsDiscrepancy( |
82 self._stats.mouse_wheel_scroll_latency) | 81 self._stats.mouse_wheel_scroll_latency) |
83 results.Add('mean_mouse_wheel_scroll_latency', 'ms', | 82 results.Add('mean_mouse_wheel_scroll_latency', 'ms', |
84 round(mean_mouse_wheel_scroll_latency, 3)) | 83 round(mean_mouse_wheel_scroll_latency, 3)) |
85 results.Add('mouse_wheel_scroll_latency_discrepancy', '', | 84 results.Add('mouse_wheel_scroll_latency_discrepancy', '', |
86 round(mouse_wheel_scroll_latency_discrepancy, 4)) | 85 round(mouse_wheel_scroll_latency_discrepancy, 4)) |
87 | 86 |
88 if self._stats.touch_scroll_latency: | 87 if self._stats.touch_scroll_latency: |
89 mean_touch_scroll_latency = statistics.ArithmeticMean( | 88 mean_touch_scroll_latency = statistics.ArithmeticMean( |
90 self._stats.touch_scroll_latency, | 89 self._stats.touch_scroll_latency) |
91 len(self._stats.touch_scroll_latency)) | |
92 touch_scroll_latency_discrepancy = statistics.DurationsDiscrepancy( | 90 touch_scroll_latency_discrepancy = statistics.DurationsDiscrepancy( |
93 self._stats.touch_scroll_latency) | 91 self._stats.touch_scroll_latency) |
94 results.Add('mean_touch_scroll_latency', 'ms', | 92 results.Add('mean_touch_scroll_latency', 'ms', |
95 round(mean_touch_scroll_latency, 3)) | 93 round(mean_touch_scroll_latency, 3)) |
96 results.Add('touch_scroll_latency_discrepancy', '', | 94 results.Add('touch_scroll_latency_discrepancy', '', |
97 round(touch_scroll_latency_discrepancy, 4)) | 95 round(touch_scroll_latency_discrepancy, 4)) |
98 | 96 |
99 if self._stats.js_touch_scroll_latency: | 97 if self._stats.js_touch_scroll_latency: |
100 mean_js_touch_scroll_latency = statistics.ArithmeticMean( | 98 mean_js_touch_scroll_latency = statistics.ArithmeticMean( |
101 self._stats.js_touch_scroll_latency, | 99 self._stats.js_touch_scroll_latency) |
102 len(self._stats.js_touch_scroll_latency)) | |
103 js_touch_scroll_latency_discrepancy = statistics.DurationsDiscrepancy( | 100 js_touch_scroll_latency_discrepancy = statistics.DurationsDiscrepancy( |
104 self._stats.js_touch_scroll_latency) | 101 self._stats.js_touch_scroll_latency) |
105 results.Add('mean_js_touch_scroll_latency', 'ms', | 102 results.Add('mean_js_touch_scroll_latency', 'ms', |
106 round(mean_js_touch_scroll_latency, 3)) | 103 round(mean_js_touch_scroll_latency, 3)) |
107 results.Add('js_touch_scroll_latency_discrepancy', '', | 104 results.Add('js_touch_scroll_latency_discrepancy', '', |
108 round(js_touch_scroll_latency_discrepancy, 4)) | 105 round(js_touch_scroll_latency_discrepancy, 4)) |
109 | 106 |
110 # List of raw frame times. | 107 # List of raw frame times. |
111 frame_times = FlattenList(self._stats.frame_times) | 108 frame_times = FlattenList(self._stats.frame_times) |
112 results.Add('frame_times', 'ms', frame_times) | 109 results.Add('frame_times', 'ms', frame_times) |
113 | 110 |
114 # Arithmetic mean of frame times. | 111 # Arithmetic mean of frame times. |
115 mean_frame_time = statistics.ArithmeticMean(frame_times, | 112 mean_frame_time = statistics.ArithmeticMean(frame_times) |
116 len(frame_times)) | |
117 results.Add('mean_frame_time', 'ms', round(mean_frame_time, 3)) | 113 results.Add('mean_frame_time', 'ms', round(mean_frame_time, 3)) |
118 | 114 |
119 # Absolute discrepancy of frame time stamps. | 115 # Absolute discrepancy of frame time stamps. |
120 frame_discrepancy = statistics.TimestampsDiscrepancy( | 116 frame_discrepancy = statistics.TimestampsDiscrepancy( |
121 self._stats.frame_timestamps) | 117 self._stats.frame_timestamps) |
122 results.Add('jank', 'ms', round(frame_discrepancy, 4)) | 118 results.Add('jank', 'ms', round(frame_discrepancy, 4)) |
123 | 119 |
124 # Are we hitting 60 fps for 95 percent of all frames? | 120 # Are we hitting 60 fps for 95 percent of all frames? |
125 # We use 19ms as a somewhat looser threshold, instead of 1000.0/60.0. | 121 # We use 19ms as a somewhat looser threshold, instead of 1000.0/60.0. |
126 percentile_95 = statistics.Percentile(frame_times, 95.0) | 122 percentile_95 = statistics.Percentile(frame_times, 95.0) |
127 results.Add('mostly_smooth', 'score', 1.0 if percentile_95 < 19.0 else 0.0) | 123 results.Add('mostly_smooth', 'score', 1.0 if percentile_95 < 19.0 else 0.0) |
128 | 124 |
129 if tab.browser.platform.IsRawDisplayFrameRateSupported(): | 125 if tab.browser.platform.IsRawDisplayFrameRateSupported(): |
130 for r in tab.browser.platform.GetRawDisplayFrameRateMeasurements(): | 126 for r in tab.browser.platform.GetRawDisplayFrameRateMeasurements(): |
131 if r.value is None: | 127 if r.value is None: |
132 raise MissingDisplayFrameRateError(r.name) | 128 raise MissingDisplayFrameRateError(r.name) |
133 results.Add(r.name, r.unit, r.value) | 129 results.Add(r.name, r.unit, r.value) |
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