preview/testing/performance.jd

page.title=
page.image=images/cards/card-test-performance_2x.png
page.keywords=, FPS,

@jd:body


<div id="qv-wrapper">
  <div id="qv">
    <h2>  </h2>
      <ol>
        <li><a href="#measure">UI  </a>
          <ul>
            <li><a href="#aggregate">  </a></li>
            <li><a href="#timing-info">   </a></li>
            <li><a href="#timing-dump">   </a></li>
            <li><a href="#collection-window">   </a></li>
            <li><a href="#diagnose">  </a></li>
            <li><a href="#resources"> </a></li>
          </ul>
        </li>
        <li><a href="#automate">UI   </a>
          <ul>
            <li><a href="#ui-tests">UI  </a></li>
            <li><a href="#automated-tests"> UI  </a></li>
            <li><a href="#triage">    </a></li>
          </ul>
        </li>
      </ol>
  </div>
</div>


<p>
   (UI)                60   (<a href="https://www.youtube.com/watch?v=CaMTIgxCSqU&index=25&list=PLWz5rJ2EKKc9CBxr3BVjPTPoDPLdPIFCE"> 60fps?</a>)   ,    <em>jank</em>(  )     .


   UI          ,   UI       .


</p>


<h2 id="measure">UI  </h2>

<p>
           ,             .


</p>

<p>
  <em><a href="https://source.android.com/devices/tech/debug/dumpsys.html">dumpsys</a></em> Android             .

 <em>gfxinfo</em>  dumpsys            logcat  .


</p>

<pre>
&gt; adb shell dumpsys gfxinfo &lt;PACKAGE_NAME&gt;
</pre>

<p>
              .
</p>

<h3 id="aggregate">  </h3>

<p>
  M         logcat .       .
    .
</p>

<pre class="noprettyprint">
Stats since: 752958278148ns
Total frames rendered: 82189
Janky frames: 35335 (42.99%)
90th percentile: 34ms
95th percentile: 42ms
99th percentile: 69ms
Number Missed Vsync: 4706
Number High input latency: 142
Number Slow UI thread: 17270
Number Slow bitmap uploads: 1542
Number Slow draw: 23342
</pre>

<p>
             ,        .

</p>


<h3 id="timing-info">   </h3>

<p>
  M   gfxinfo      .  <em>framestats</em>,                .


</p>

<pre>
&gt;adb shell dumpsys gfxinfo &lt;PACKAGE_NAME&gt; framestats
</pre>

<p>
         ,      120 .  adb dumpsys gfxinfo
  &lt;PACKAGE_NAME&gt; framestats      .

</p>

<pre class="noprettyprint">
0,49762224585003,49762241251670,9223372036854775807,0,49762257627204,49762257646058,49762257969704,49762258002100,49762265541631,49762273951162,49762300914808,49762303675954,
0,49762445152142,49762445152142,9223372036854775807,0,49762446678818,49762446705589,49762447268818,49762447388037,49762453551527,49762457134131,49762474889027,49762476150120,
0,49762462118845,49762462118845,9223372036854775807,0,49762462595381,49762462619287,49762462919964,49762462968454,49762476194547,49762476483454,49762480214964,49762480911527,
0,49762479085548,49762479085548,9223372036854775807,0,49762480066370,49762480099339,49762481013089,49762481085850,49762482232152,49762482478350,49762485657620,49762486116683,
</pre>

<p>
         .                .
       ,       .

</p>


<h4 id="fs-data-format">Framestats  </h4>

<p>
    CSV                 .
        .
    .
</p>

<ul>
  <li>
    <ul>
      <li>  '0'    ,     FRAME_COMPLETED  INTENDED_VSYNC   .

      </li>

      <li> 0     .        ,    16ms    .

       .
        <ul>
          <li>  (       ).

          </li>

          <li>   .        .
      60fps              ,        .


          </li>
        </ul>
      </li>
    </ul>
  </li>

  <li>INTENDED_VSYNC
    <ul>
      <li>     .   VSYNC  , UI      vsync        .


      </li>
    </ul>
  </li>

  <li>VSYNC
    <ul>
      <li>Vsync        .(Choreographer  , , View.getDrawingTime() )

      </li>

      <li>VSYNC         <a href="https://www.youtube.com/watch?v=1iaHxmfZGGc&list=PLOU2XLYxmsIKEOXh5TwZEv89aofHzNCiu&index=23">VSYNC </a>  .


      </li>
    </ul>
  </li>

  <li>OLDEST_INPUT_EVENT
    <ul>
      <li>              Long.MAX_VALUE.

      </li>

      <li>             .

      </li>
    </ul>
  </li>

  <li>NEWEST_INPUT_EVENT
    <ul>
      <li>              Long.MAX_VALUE.

      </li>

      <li>             .

      </li>

      <li>           . (FRAME_COMPLETED - NEWEST_INPUT_EVENT)  .

      </li>
    </ul>
  </li>

  <li>HANDLE_INPUT_START
    <ul>
      <li>     .
      </li>

      <li> ANIMATION_START            .

      </li>

      <li>  (2ms )           .   View.onTouchEvent()           .

         .           ,        .


      </li>
    </ul>
  </li>

  <li>ANIMATION_START
    <ul>
      <li>Choreographer     .
      </li>

      <li> PERFORM_TRANVERSALS_START       ((ObjectAnimator, ViewPropertyAnimator  Transitions  )        .


      </li>

      <li>  (2ms ),        .  ObjectAnimators             .


      </li>

      <li>Choreographer    <a href="https://developers.google.com/events/io/sessions/325418001"> (For Butter or Worse)</a>  .

      </li>
    </ul>
  </li>

  <li>PERFORM_TRAVERSALS_START
    <ul>
      <li>  DRAW_START           (      0       ).


      </li>

      <li>         <a href="https://www.youtube.com/watch?v=we6poP0kw6E&list=PLOU2XLYxmsIKEOXh5TwZEv89aofHzNCiu&index=27">,   </a>  .


      </li>
    </ul>
  </li>

  <li>DRAW_START
    <ul>
      <li>PerformTraversals    .         .

      </li>

      <li> SYNC_START       View.draw()    .

      </li>

      <li>     <a href="{@docRoot}guide/topics/graphics/hardware-accel.html#hardware-model"> </a>  <a href="https://www.youtube.com/watch?v=we6poP0kw6E&list=PLOU2XLYxmsIKEOXh5TwZEv89aofHzNCiu&index=27">,   </a>  .


      </li>
    </ul>
  </li>

  <li>SYNC_START
    <ul>
      <li>    .
      </li>

      <li> ISSUE_DRAW_COMMANDS_START      (0.4ms    ),       GPU   .


      </li>

      <li>      <a href="https://www.youtube.com/watch?v=VzYkVL1n4M8&index=24&list=PLOU2XLYxmsIKEOXh5TwZEv89aofHzNCiu"> GPU </a>  .

      </li>
    </ul>
  </li>

  <li>ISSUE_DRAW_COMMANDS_START
    <ul>
      <li>  GPU     .
      </li>

      <li> FRAME_COMPLETED       GPU       .
 Overdraw          .

      </li>
    </ul>
  </li>

  <li>SWAP_BUFFERS
    <ul>
      <li>EglSwapBuffers  ,      .

      </li>
    </ul>
  </li>

  <li>FRAME_COMPLETED
    <ul>
      <li> !        FRAME_COMPLETED - INTENDED_VSYNC  .

      </li>
    </ul>
  </li>

</ul>

<p>
         .        (FRAME_COMPLETED - INTENDED_VSYNC)           .   .

             .  16ms  ( )   ,        .

                .
         ,            .


</p>

<img src="{@docRoot}preview/images/perf-test-framestats.png">


<h3 id="timing-dump">   </h3>

<p>
  <strong> GPU </strong>   <strong>adb  dumpsys gfxinfo</strong>  , <code>adb shell dumpsys gfxinfo</code>    120     ,           .


              .

</p>

<p>
   <a href="#fs-data-format">framestats</a> ,             .

             .

</p>

<img src="{@docRoot}preview/images/perf-test-frame-latency.png">

<p>
  Gfxinfo  ,               .

</p>

<p>
        .            .
           ,             .

            <a href="https://www.youtube.com/watch?v=we6poP0kw6E&index=27&list=PLWz5rJ2EKKc9CBxr3BVjPTPoDPLdPIFCE">   </a>  .


</p>


<h3 id="collection-window">   </h3>

<p>
  Framestats            .   2  .
     (:    ),        .


</p>

<pre>
&gt;adb shell dumpsys gfxinfo &lt;PACKAGE_NAME&gt; reset
</pre>

<p>
                 2         .


</p>


<h3 id="diagnose">  </h3>

<p>
                   .
  dumpsys         .
                 .
  , <a href="{@docRoot}tools/help/systrace.html">systrace</a>     .

</p>


<h3 id="resources"> </h3>

<p>
  Android                 ,         .


</p>

<ul>
  <li>
  </li>
  <li> 60fps?
  </li>
  <li>Android UI GPU
  </li>
  <li>
  </li>
  <li>Systrace UI
  </li>
</ul>


<h2 id="automate">UI   </h2>

<p>
  UI                 .   jank  ,        jank  .

       .        ,         .


</p>

<p>
       UI        .
 Android M           jank    ,               .


</p>

<p>
              .

</p>

<p>
         .   ,   .           .


</p>


<h3 id="ui-tests">UI  </h3>

<p>
             .          .

</p>

<h4>
    /
</h4>

<p>
                .
 ,  UI                  .

              .
</p>

<ul>
  <li> ListView  RecyclerView
  </li>

  <li>
  </li>

  <li> /
  </li>

  <li>
  </li>

  <li>Canvas
  </li>
</ul>

<p>
    ,                 .

</p>

<h4>

</h4>

<p>
           ,         .
    .
</p>

<ul>
  <li> UI        ?
  </li>

  <li>      ?
  </li>

  <li>     90%     98%  ?
  </li>

  <li>    98%    ?
  </li>

  <li>     ?
  </li>
</ul>

<p>
    ,            .

</p>

<h4>

</h4>

<p>
          .    GPU   CPU     .
                .              .

 ,                .   ,  ,      .

 CPU , RAM,  ,     .
         .

</p>

<h4>
  UI
</h4>

<p>
  <a href="{@docRoot}training/testing/ui-testing/uiautomator-testing.html">UI Automator</a> <a href="{@docRoot}training/testing/ui-testing/espresso-testing.html">Espresso</a>              .

   ,     .
   ,       .   -  ,    .


</p>

<p>
        <code>dumpsys gfxinfo</code>                 .


</p>


<h3 id="automated-tests"> UI  </h3>

<p>
  UI     ,               ,                      .


</p>

<h4>

</h4>

<p>
  UI  (: <a href="{@docRoot}training/testing/ui-testing/uiautomator-testing.html">UI Automator</a>)  /       .
  <em>dumpsys gfxinfo</em>         ADB   .
          <a href="{@docRoot}tools/help/monkeyrunner_concepts.html">MonkeyRunner</a>  .      ,           .


</p>

<p>
  UI           ,      monkeyRunner    .

</p>

<ul>
  <li> APK  (   )    .
  </li>

  <li>UI Automator UI    .
  </li>

  <li><em>dumpsys gfxinfo</em><em></em>    .
  </li>

  <li>        .
  </li>
</ul>


<h3 id="triage">    </h3>

<p>
      ,      .
          ,   /    (  )               .


   , <a href="{@docRoot}tools/help/systrace.html">systrace</a>   .      ,                   .


</p>

<h4>

</h4>

<p>
               .
         ,    ,                .

           ,      .


</p>

<p>
                   (   '(batch)'  )   .            .


</p>

<p>
                 .
           ,      WRT   .


</p>

<p>
       UI        ,          .
       (    )                 .


</p>

<p>
           ?  10  .   50 100       (,      ).


</p>