tree b93a52a09020d088e4cd36d39f160c19e980838c
parent 2bd46c6b19466cb6898a6a1cffb008ede52185f0
author Dan Stoza <stoza@google.com> 1522282056 -0700
committer Jorim Jaggi <jjaggi@google.com> 1523016909 +0200

Early wake-up for transitions (1/2)

On some devices it's very likely that we fall into GL comp during
app transitions. However, SF offsets are chosen in a way such that
the time to finish a frame is just too tight to be completely jank
free when hitting GL composition in SurfaceFlinger. Thus, we
introduce the concept of a separate early offset, and wakeup
SurfaceFlinger at that time if we think that hitting GL comp is
likely, or we already hit GL comp in the last frame.

Test: Open app, check vsync offsets in systrace
Test: Open many dialogs/apps to fall into GPU comp.
Bug: 75985430
Change-Id: Ie17e30c4575359fa11bb8912f68dcafe3e569ddb