title: What does "SurfaceView" represent in systrace result?
body: <p>When investigating an game play stuttering issue, I found that bewteen eglSwapBuffer() from the game and postFramebuffer() in surfaceflinger, there is always a delay in "SurfaceView" lasts from 0.5ms to 10ms which seems pretty random and irrelevant to CPU load. What does this really represents? Does it has anything to do with VSYNC point of display?</p>
  
  <p><a href="http://i.stack.imgur.com/n8MvG.png" rel="nofollow">http://i.stack.imgur.com/n8MvG.png</a></p>