Improve latency instrumentation.

Change-Id: I4edfa0a5659d207f7e46722e48ffa1dc43d2aa13

1 files changed, 8 insertions, 5 deletions

diff --git a/core/java/android/view/ViewDebug.java b/core/java/android/view/ViewDebug.java
index 65e72c9c8123..c1db5720e2f1 100644
--- a/core/java/android/view/ViewDebug.java
+++ b/core/java/android/view/ViewDebug.java
@@ -127,16 +127,19 @@ public class ViewDebug {
      * Logs the relative difference between the time an event was created and the time it
      * was delivered.
      *
-     * Logs the time spent waiting for Surface.lockCanvas() or eglSwapBuffers().
-     * This is time that the event loop spends blocked and unresponsive.  Ideally, drawing
-     * and animations should be perfectly synchronized with VSYNC so that swap buffers
-     * is instantaneous.
+     * Logs the time spent waiting for Surface.lockCanvas(), Surface.unlockCanvasAndPost()
+     * or eglSwapBuffers().  This is time that the event loop spends blocked and unresponsive.
+     * Ideally, drawing and animations should be perfectly synchronized with VSYNC so that
+     * dequeuing and queueing buffers is instantaneous.
      *
-     * Logs the time spent in ViewRoot.performTraversals() or ViewRoot.draw().
+     * Logs the time spent in ViewRoot.performTraversals() and ViewRoot.performDraw().
      * @hide
      */
     public static final boolean DEBUG_LATENCY = false;
 
+    /** @hide */
+    public static final String DEBUG_LATENCY_TAG = "ViewLatency";
+
     /**
      * <p>Enables or disables views consistency check. Even when this property is enabled,
      * view consistency checks happen only if {@link false} is set