Improve updateInputFlinger performance
This change improves the performance of the WindowInfosListenerInvoker work done on SurfaceFlinger's background executor thread. The primary optimization made is not sending a WindowInfosReportedListener with every call to WindowInfosListener.onWindowInfosChanged. Instead, we send a new interface, WindowInfosPublisher, and a unique listener id to listeners when they're added. Listeners call WindowInfosPublisher.ackWindowInfosReceived with their id after processing each update.
From traces taken during development, the new code is a major improvement, taking about 15% of the time spent previously on SurfaceFlinger's background thread for sending window infos. Performance with this change seems roughly in line with the performance in T.
Bug: 290377931
Test: atest WindowInfosListenerTest
Test: atest WindowInfosListenerInvokerTest
Test: manually killing system server and checking valid state on restart
(cherry picked from commit acd2258a5492a9e289fd7f4b8ea90543d6843a23)
(cherry picked from commit e8a7ab25b2f2f17571279a2c2bf2ea0dff66c8e6)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:82f3463d449eb13e28c5dbffeee16e10721c71d2)
Merged-In: Ib39ba935727df0bc1ab4030bcfe8301de7e64805
Change-Id: Ib39ba935727df0bc1ab4030bcfe8301de7e64805
diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index bf34987..3c8df2b 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -73,6 +73,7 @@
"android/gui/FocusRequest.aidl",
"android/gui/InputApplicationInfo.aidl",
"android/gui/IWindowInfosListener.aidl",
+ "android/gui/IWindowInfosPublisher.aidl",
"android/gui/IWindowInfosReportedListener.aidl",
"android/gui/WindowInfo.aidl",
"android/gui/WindowInfosUpdate.aidl",
@@ -90,6 +91,7 @@
"android/gui/FocusRequest.aidl",
"android/gui/InputApplicationInfo.aidl",
"android/gui/IWindowInfosListener.aidl",
+ "android/gui/IWindowInfosPublisher.aidl",
"android/gui/IWindowInfosReportedListener.aidl",
"android/gui/WindowInfosUpdate.aidl",
"android/gui/WindowInfo.aidl",