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Added LatencyTimer to ease latency measurements

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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
This commit is contained in:
Michael Chan
2009-05-13 17:29:48 -07:00
parent 4eebf590a3
commit 53071d6d15
6 changed files with 270 additions and 27 deletions
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46
services/java/com/android/server/KeyInputQueue.java
View File

@@ -18,8 +18,9 @@ package com.android.server;
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 abstract class KeyInputQueue {
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 @@ public abstract class KeyInputQueue {
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 @@ public abstract class KeyInputQueue {
}
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 @@ public abstract class KeyInputQueue {
if (configChanged) {
synchronized (mFirst) {
addLocked(di, SystemClock.uptimeMillis(), 0,
addLocked(di, System.nanoTime(), 0,
RawInputEvent.CLASS_CONFIGURATION_CHANGED,
null);
}
@@ -256,6 +264,7 @@ public abstract class KeyInputQueue {
// 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 @@ public abstract class KeyInputQueue {
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 @@ public abstract class KeyInputQueue {
}
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 @@ public abstract class KeyInputQueue {
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 @@ public abstract class KeyInputQueue {
}
}
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 @@ public abstract class KeyInputQueue {
mCacheCount--;
}
ev.inputDevice = device;
ev.when = when;
ev.whenNano = whenNano;
ev.flags = flags;
ev.classType = classType;
ev.event = event;
@@ -561,13 +570,13 @@ public abstract class KeyInputQueue {
}
}
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 @@ public abstract class KeyInputQueue {
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);
}
}
}