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telemetry.web_perf.metrics.rendering_stats.html

telemetry.web_perf.metrics.rendering_stats.html 8.7 KB
文件歷史 原始文件

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  1. 

  2. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    3. 

  3. <html><head><title>Python: module telemetry.web_perf.metrics.rendering_stats</title>
    4. 

  4. <meta charset="utf-8">
    5. 

  5. </head><body bgcolor="#f0f0f8">
    6. 

  6. 

  7. <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="heading">
    8. 

  8. <tr bgcolor="#7799ee">
    9. 

  9. <td valign=bottom>&nbsp;<br>
    10. 

  10. <font color="#ffffff" face="helvetica, arial">&nbsp;<br><big><big><strong><a href="telemetry.html"><font color="#ffffff">telemetry</font></a>.<a href="telemetry.web_perf.html"><font color="#ffffff">web_perf</font></a>.<a href="telemetry.web_perf.metrics.html"><font color="#ffffff">metrics</font></a>.rendering_stats</strong></big></big></font></td
    11. 

  11. ><td align=right valign=bottom
    12. 

  12. ><font color="#ffffff" face="helvetica, arial"><a href=".">index</a><br><a href="../telemetry/web_perf/metrics/rendering_stats.py">telemetry/web_perf/metrics/rendering_stats.py</a></font></td></tr></table>
    13. 

  13.     <p><tt>#&nbsp;Copyright&nbsp;2014&nbsp;The&nbsp;Chromium&nbsp;Authors.&nbsp;All&nbsp;rights&nbsp;reserved.<br>
    14. 

  14. #&nbsp;Use&nbsp;of&nbsp;this&nbsp;source&nbsp;code&nbsp;is&nbsp;governed&nbsp;by&nbsp;a&nbsp;BSD-style&nbsp;license&nbsp;that&nbsp;can&nbsp;be<br>
    15. 

  15. #&nbsp;found&nbsp;in&nbsp;the&nbsp;LICENSE&nbsp;file.</tt></p>
    16. 

  16. <p>
    17. 

  17. <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
    18. 

  18. <tr bgcolor="#aa55cc">
    19. 

  19. <td colspan=3 valign=bottom>&nbsp;<br>
    20. 

  20. <font color="#ffffff" face="helvetica, arial"><big><strong>Modules</strong></big></font></td></tr>
    21. 

  21.     
    22. 

  22. <tr><td bgcolor="#aa55cc"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
    23. 

  23. <td width="100%"><table width="100%" summary="list"><tr><td width="25%" valign=top><a href="itertools.html">itertools</a><br>
    24. 

  24. </td><td width="25%" valign=top><a href="telemetry.web_perf.metrics.rendering_frame.html">telemetry.web_perf.metrics.rendering_frame</a><br>
    25. 

  25. </td><td width="25%" valign=top></td><td width="25%" valign=top></td></tr></table></td></tr></table><p>
    26. 

  26. <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
    27. 

  27. <tr bgcolor="#ee77aa">
    28. 

  28. <td colspan=3 valign=bottom>&nbsp;<br>
    29. 

  29. <font color="#ffffff" face="helvetica, arial"><big><strong>Classes</strong></big></font></td></tr>
    30. 

  30.     
    31. 

  31. <tr><td bgcolor="#ee77aa"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
    32. 

  32. <td width="100%"><dl>
    33. 

  33. <dt><font face="helvetica, arial"><a href="__builtin__.html#object">__builtin__.object</a>
    34. 

  34. </font></dt><dd>
    35. 

  35. <dl>
    36. 

  36. <dt><font face="helvetica, arial"><a href="telemetry.web_perf.metrics.rendering_stats.html#RenderingStats">RenderingStats</a>
    37. 

  37. </font></dt></dl>
    38. 

  38. </dd>
    39. 

  39. </dl>
    40. 

  40.  <p>
    41. 

  41. <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
    42. 

  42. <tr bgcolor="#ffc8d8">
    43. 

  43. <td colspan=3 valign=bottom>&nbsp;<br>
    44. 

  44. <font color="#000000" face="helvetica, arial"><a name="RenderingStats">class <strong>RenderingStats</strong></a>(<a href="__builtin__.html#object">__builtin__.object</a>)</font></td></tr>
    45. 

  45.     
    46. 

  46. <tr><td bgcolor="#ffc8d8"><tt>&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
    47. 

  47. <td width="100%">Methods defined here:<br>
    48. 

  48. <dl><dt><a name="RenderingStats-__init__"><strong>__init__</strong></a>(self, renderer_process, browser_process, surface_flinger_process, timeline_ranges)</dt><dd><tt>Utility&nbsp;class&nbsp;for&nbsp;extracting&nbsp;rendering&nbsp;statistics&nbsp;from&nbsp;the&nbsp;timeline&nbsp;(or<br>
    49. 

  49. other&nbsp;loggin&nbsp;facilities),&nbsp;and&nbsp;providing&nbsp;them&nbsp;in&nbsp;a&nbsp;common&nbsp;format&nbsp;to&nbsp;classes<br>
    50. 

  50. that&nbsp;compute&nbsp;benchmark&nbsp;metrics&nbsp;from&nbsp;this&nbsp;data.<br>
    51. 

  51. &nbsp;<br>
    52. 

  52. Stats&nbsp;are&nbsp;lists&nbsp;of&nbsp;lists&nbsp;of&nbsp;numbers.&nbsp;The&nbsp;outer&nbsp;list&nbsp;stores&nbsp;one&nbsp;list&nbsp;per<br>
    53. 

  53. timeline&nbsp;range.<br>
    54. 

  54. &nbsp;<br>
    55. 

  55. All&nbsp;*_time&nbsp;values&nbsp;are&nbsp;measured&nbsp;in&nbsp;milliseconds.</tt></dd></dl>
    56. 

  56. 

  57. <hr>
    58. 

  58. Data descriptors defined here:<br>
    59. 

  59. <dl><dt><strong>__dict__</strong></dt>
    60. 

  60. <dd><tt>dictionary&nbsp;for&nbsp;instance&nbsp;variables&nbsp;(if&nbsp;defined)</tt></dd>
    61. 

  61. </dl>
    62. 

  62. <dl><dt><strong>__weakref__</strong></dt>
    63. 

  63. <dd><tt>list&nbsp;of&nbsp;weak&nbsp;references&nbsp;to&nbsp;the&nbsp;object&nbsp;(if&nbsp;defined)</tt></dd>
    64. 

  64. </dl>
    65. 

  65. </td></tr></table></td></tr></table><p>
    66. 

  66. <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
    67. 

  67. <tr bgcolor="#eeaa77">
    68. 

  68. <td colspan=3 valign=bottom>&nbsp;<br>
    69. 

  69. <font color="#ffffff" face="helvetica, arial"><big><strong>Functions</strong></big></font></td></tr>
    70. 

  70.     
    71. 

  71. <tr><td bgcolor="#eeaa77"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
    72. 

  72. <td width="100%"><dl><dt><a name="-ComputeEventLatencies"><strong>ComputeEventLatencies</strong></a>(input_events)</dt><dd><tt>Compute&nbsp;input&nbsp;event&nbsp;latencies.<br>
    73. 

  73. &nbsp;<br>
    74. 

  74. Input&nbsp;event&nbsp;latency&nbsp;is&nbsp;the&nbsp;time&nbsp;from&nbsp;when&nbsp;the&nbsp;input&nbsp;event&nbsp;is&nbsp;created&nbsp;to<br>
    75. 

  75. when&nbsp;its&nbsp;resulted&nbsp;page&nbsp;is&nbsp;swap&nbsp;buffered.<br>
    76. 

  76. Input&nbsp;event&nbsp;on&nbsp;differnt&nbsp;platforms&nbsp;uses&nbsp;different&nbsp;LatencyInfo&nbsp;component&nbsp;to<br>
    77. 

  77. record&nbsp;its&nbsp;creation&nbsp;timestamp.&nbsp;We&nbsp;go&nbsp;through&nbsp;the&nbsp;following&nbsp;component&nbsp;list<br>
    78. 

  78. to&nbsp;find&nbsp;the&nbsp;creation&nbsp;timestamp:<br>
    79. 

  79. 1.&nbsp;INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT&nbsp;--&nbsp;when&nbsp;event&nbsp;is&nbsp;created&nbsp;in&nbsp;OS<br>
    80. 

  80. 2.&nbsp;INPUT_EVENT_LATENCY_UI_COMPONENT&nbsp;--&nbsp;when&nbsp;event&nbsp;reaches&nbsp;Chrome<br>
    81. 

  81. 3.&nbsp;INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT&nbsp;--&nbsp;when&nbsp;event&nbsp;reaches&nbsp;RenderWidget<br>
    82. 

  82. &nbsp;<br>
    83. 

  83. If&nbsp;the&nbsp;latency&nbsp;starts&nbsp;with&nbsp;a<br>
    84. 

  84. LATENCY_BEGIN_SCROLL_UPDATE_MAIN_COMPONENT&nbsp;component,&nbsp;then&nbsp;it&nbsp;is<br>
    85. 

  85. classified&nbsp;as&nbsp;a&nbsp;scroll&nbsp;update&nbsp;instead&nbsp;of&nbsp;a&nbsp;normal&nbsp;input&nbsp;latency&nbsp;measure.<br>
    86. 

  86. &nbsp;<br>
    87. 

  87. Returns:<br>
    88. 

  88. &nbsp;&nbsp;A&nbsp;list&nbsp;sorted&nbsp;by&nbsp;increasing&nbsp;start&nbsp;time&nbsp;of&nbsp;latencies&nbsp;which&nbsp;are&nbsp;tuples&nbsp;of<br>
    89. 

  89. &nbsp;&nbsp;(input_event_name,&nbsp;latency_in_ms).</tt></dd></dl>
    90. 

  90.  <dl><dt><a name="-GetLatencyEvents"><strong>GetLatencyEvents</strong></a>(process, timeline_range)</dt><dd><tt>Get&nbsp;LatencyInfo&nbsp;trace&nbsp;events&nbsp;from&nbsp;the&nbsp;process's&nbsp;trace&nbsp;buffer&nbsp;that&nbsp;are<br>
    91. 

  91. &nbsp;&nbsp;&nbsp;within&nbsp;the&nbsp;timeline_range.<br>
    92. 

  92. &nbsp;<br>
    93. 

  93. Input&nbsp;events&nbsp;dump&nbsp;their&nbsp;LatencyInfo&nbsp;into&nbsp;trace&nbsp;buffer&nbsp;as&nbsp;async&nbsp;trace&nbsp;event<br>
    94. 

  94. of&nbsp;name&nbsp;starting&nbsp;with&nbsp;"InputLatency".&nbsp;Non-input&nbsp;events&nbsp;with&nbsp;name&nbsp;starting<br>
    95. 

  95. with&nbsp;"Latency".&nbsp;The&nbsp;trace&nbsp;event&nbsp;has&nbsp;a&nbsp;memeber&nbsp;'data'&nbsp;containing&nbsp;its&nbsp;latency<br>
    96. 

  96. history.</tt></dd></dl>
    97. 

  97.  <dl><dt><a name="-GetTimestampEventName"><strong>GetTimestampEventName</strong></a>(process)</dt><dd><tt>Returns&nbsp;the&nbsp;name&nbsp;of&nbsp;the&nbsp;events&nbsp;used&nbsp;to&nbsp;count&nbsp;frame&nbsp;timestamps.</tt></dd></dl>
    98. 

  98.  <dl><dt><a name="-HasRenderingStats"><strong>HasRenderingStats</strong></a>(process)</dt><dd><tt>Returns&nbsp;True&nbsp;if&nbsp;the&nbsp;process&nbsp;contains&nbsp;at&nbsp;least&nbsp;one<br>
    99. 

  99. BenchmarkInstrumentation::*<a href="#RenderingStats">RenderingStats</a>&nbsp;event&nbsp;with&nbsp;a&nbsp;frame.</tt></dd></dl>
    100. 

  100. </td></tr></table><p>
    101. 

  101. <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
    102. 

  102. <tr bgcolor="#55aa55">
    103. 

  103. <td colspan=3 valign=bottom>&nbsp;<br>
    104. 

  104. <font color="#ffffff" face="helvetica, arial"><big><strong>Data</strong></big></font></td></tr>
    105. 

  105.     
    106. 

  106. <tr><td bgcolor="#55aa55"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
    107. 

  107. <td width="100%"><strong>APPROXIMATED_PIXEL_ERROR</strong> = 'approximated_pixel_percentages'<br>
    108. 

  108. <strong>APPROXIMATED_VISIBLE_CONTENT_DATA</strong> = 'approximated_visible_content_area'<br>
    109. 

  109. <strong>BEGIN_COMP_NAME</strong> = 'INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT'<br>
    110. 

  110. <strong>BEGIN_SCROLL_UPDATE_COMP_NAME</strong> = 'LATENCY_BEGIN_SCROLL_LISTENER_UPDATE_MAIN_COMPONENT'<br>
    111. 

  111. <strong>CHECKERBOARDED_PIXEL_ERROR</strong> = 'checkerboarded_pixel_percentages'<br>
    112. 

  112. <strong>CHECKERBOARDED_VISIBLE_CONTENT_DATA</strong> = 'checkerboarded_visible_content_area'<br>
    113. 

  113. <strong>END_COMP_NAME</strong> = 'INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT'<br>
    114. 

  114. <strong>FORWARD_SCROLL_UPDATE_COMP_NAME</strong> = 'INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT'<br>
    115. 

  115. <strong>GESTURE_SCROLL_UPDATE_EVENT_NAME</strong> = 'InputLatency::GestureScrollUpdate'<br>
    116. 

  116. <strong>MAIN_THREAD_SCROLL_UPDATE_EVENT_NAME</strong> = 'Latency::ScrollUpdate'<br>
    117. 

  117. <strong>ORIGINAL_COMP_NAME</strong> = 'INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT'<br>
    118. 

  118. <strong>UI_COMP_NAME</strong> = 'INPUT_EVENT_LATENCY_UI_COMPONENT'<br>
    119. 

  119. <strong>VISIBLE_CONTENT_DATA</strong> = 'visible_content_area'</td></tr></table>
    120. 

  120. </body></html>
    121.