Added LatencyTimer to ease latency measurements
new file: core/java/android/os/LatencyTimer.java
modified: core/java/android/view/MotionEvent.java
modified: core/java/android/view/ViewRoot.java
modified: services/java/com/android/server/InputDevice.java
modified: services/java/com/android/server/KeyInputQueue.java
modified: services/java/com/android/server/WindowManagerService.java
diff --git a/services/java/com/android/server/KeyInputQueue.java b/services/java/com/android/server/KeyInputQueue.java
index 411cd6b..78cdf8b 100644
--- a/services/java/com/android/server/KeyInputQueue.java
+++ b/services/java/com/android/server/KeyInputQueue.java
@@ -18,8 +18,9 @@
import android.content.Context;
import android.content.res.Configuration;
-import android.os.SystemClock;
+import android.os.LatencyTimer;
import android.os.PowerManager;
+import android.os.SystemClock;
import android.util.Log;
import android.util.SparseArray;
import android.view.Display;
@@ -73,14 +74,17 @@
public static final int FILTER_REMOVE = 0;
public static final int FILTER_KEEP = 1;
public static final int FILTER_ABORT = -1;
-
+
+ private static final boolean MEASURE_LATENCY = false;
+ private LatencyTimer lt;
+
public interface FilterCallback {
int filterEvent(QueuedEvent ev);
}
static class QueuedEvent {
InputDevice inputDevice;
- long when;
+ long whenNano;
int flags; // From the raw event
int classType; // One of the class constants in InputEvent
Object event;
@@ -88,7 +92,7 @@
void copyFrom(QueuedEvent that) {
this.inputDevice = that.inputDevice;
- this.when = that.when;
+ this.whenNano = that.whenNano;
this.flags = that.flags;
this.classType = that.classType;
this.event = that.event;
@@ -107,6 +111,10 @@
}
KeyInputQueue(Context context) {
+ if (MEASURE_LATENCY) {
+ lt = new LatencyTimer(100, 1000);
+ }
+
PowerManager pm = (PowerManager)context.getSystemService(
Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
@@ -241,7 +249,7 @@
if (configChanged) {
synchronized (mFirst) {
- addLocked(di, SystemClock.uptimeMillis(), 0,
+ addLocked(di, System.nanoTime(), 0,
RawInputEvent.CLASS_CONFIGURATION_CHANGED,
null);
}
@@ -256,6 +264,7 @@
// timebase as SystemClock.uptimeMillis().
//curTime = gotOne ? ev.when : SystemClock.uptimeMillis();
final long curTime = SystemClock.uptimeMillis();
+ final long curTimeNano = System.nanoTime();
//Log.i(TAG, "curTime=" + curTime + ", systemClock=" + SystemClock.uptimeMillis());
final int classes = di.classes;
@@ -276,7 +285,7 @@
down = false;
}
int keycode = rotateKeyCodeLocked(ev.keycode);
- addLocked(di, curTime, ev.flags,
+ addLocked(di, curTimeNano, ev.flags,
RawInputEvent.CLASS_KEYBOARD,
newKeyEvent(di, di.mDownTime, curTime, down,
keycode, 0, scancode,
@@ -330,7 +339,7 @@
}
MotionEvent me;
- me = di.mAbs.generateMotion(di, curTime, true,
+ me = di.mAbs.generateMotion(di, curTime, curTimeNano, true,
mDisplay, mOrientation, mGlobalMetaState);
if (false) Log.v(TAG, "Absolute: x=" + di.mAbs.x
+ " y=" + di.mAbs.y + " ev=" + me);
@@ -338,15 +347,15 @@
if (WindowManagerPolicy.WATCH_POINTER) {
Log.i(TAG, "Enqueueing: " + me);
}
- addLocked(di, curTime, ev.flags,
+ addLocked(di, curTimeNano, ev.flags,
RawInputEvent.CLASS_TOUCHSCREEN, me);
}
- me = di.mRel.generateMotion(di, curTime, false,
+ me = di.mRel.generateMotion(di, curTime, curTimeNano, false,
mDisplay, mOrientation, mGlobalMetaState);
if (false) Log.v(TAG, "Relative: x=" + di.mRel.x
+ " y=" + di.mRel.y + " ev=" + me);
if (me != null) {
- addLocked(di, curTime, ev.flags,
+ addLocked(di, curTimeNano, ev.flags,
RawInputEvent.CLASS_TRACKBALL, me);
}
}
@@ -530,7 +539,7 @@
}
}
- private QueuedEvent obtainLocked(InputDevice device, long when,
+ private QueuedEvent obtainLocked(InputDevice device, long whenNano,
int flags, int classType, Object event) {
QueuedEvent ev;
if (mCacheCount == 0) {
@@ -542,7 +551,7 @@
mCacheCount--;
}
ev.inputDevice = device;
- ev.when = when;
+ ev.whenNano = whenNano;
ev.flags = flags;
ev.classType = classType;
ev.event = event;
@@ -561,13 +570,13 @@
}
}
- private void addLocked(InputDevice device, long when, int flags,
+ private void addLocked(InputDevice device, long whenNano, int flags,
int classType, Object event) {
boolean poke = mFirst.next == mLast;
- QueuedEvent ev = obtainLocked(device, when, flags, classType, event);
+ QueuedEvent ev = obtainLocked(device, whenNano, flags, classType, event);
QueuedEvent p = mLast.prev;
- while (p != mFirst && ev.when < p.when) {
+ while (p != mFirst && ev.whenNano < p.whenNano) {
p = p.prev;
}
@@ -578,8 +587,15 @@
ev.inQueue = true;
if (poke) {
+ long time;
+ if (MEASURE_LATENCY) {
+ time = System.nanoTime();
+ }
mFirst.notify();
mWakeLock.acquire();
+ if (MEASURE_LATENCY) {
+ lt.sample("1 addLocked-queued event ", System.nanoTime() - time);
+ }
}
}