Prevent extra work on the same timestamp
AttentionDetector gets called a lot, and there is no reason to do
any work, unless it is called with a new timestamp.
Bug: 111939367
Test: verified by doing FSOP + atest AttentionDetectorTest
Change-Id: If427bd3358e0ea35279fb5d235c2fd137df036ac
diff --git a/services/core/java/com/android/server/attention/AttentionManagerService.java b/services/core/java/com/android/server/attention/AttentionManagerService.java
index 7605ccb..e148468 100644
--- a/services/core/java/com/android/server/attention/AttentionManagerService.java
+++ b/services/core/java/com/android/server/attention/AttentionManagerService.java
@@ -270,7 +270,7 @@
return;
}
if (!userState.mCurrentAttentionCheck.mCallbackInternal.equals(callbackInternal)) {
- Slog.e(LOG_TAG, "Cannot cancel a non-current request");
+ Slog.w(LOG_TAG, "Cannot cancel a non-current request");
return;
}
cancel(userState);
diff --git a/services/core/java/com/android/server/power/AttentionDetector.java b/services/core/java/com/android/server/power/AttentionDetector.java
index 3262eb6..14f1196 100644
--- a/services/core/java/com/android/server/power/AttentionDetector.java
+++ b/services/core/java/com/android/server/power/AttentionDetector.java
@@ -75,6 +75,8 @@
*/
private final AtomicBoolean mRequested;
+ private long mLastActedOnNextScreenDimming;
+
/**
* Monotonously increasing ID for the requests sent.
*/
@@ -150,6 +152,9 @@
}
public long updateUserActivity(long nextScreenDimming) {
+ if (nextScreenDimming == mLastActedOnNextScreenDimming) {
+ return nextScreenDimming;
+ }
if (!mIsSettingEnabled) {
return nextScreenDimming;
}
@@ -190,13 +195,14 @@
// afterwards if AttentionManager couldn't deliver it.
mRequested.set(true);
mRequestId++;
+ mLastActedOnNextScreenDimming = nextScreenDimming;
mCallback = new AttentionCallbackInternalImpl(mRequestId);
+ Slog.v(TAG, "Checking user attention, ID: " + mRequestId);
final boolean sent = mAttentionManager.checkAttention(getAttentionTimeout(), mCallback);
if (!sent) {
mRequested.set(false);
}
- Slog.v(TAG, "Checking user attention, ID: " + mRequestId);
return whenToCheck;
}
diff --git a/services/tests/servicestests/src/com/android/server/power/AttentionDetectorTest.java b/services/tests/servicestests/src/com/android/server/power/AttentionDetectorTest.java
index c30a7dd..a63f49b 100644
--- a/services/tests/servicestests/src/com/android/server/power/AttentionDetectorTest.java
+++ b/services/tests/servicestests/src/com/android/server/power/AttentionDetectorTest.java
@@ -23,6 +23,7 @@
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyLong;
import static org.mockito.Mockito.atMost;
+import static org.mockito.Mockito.clearInvocations;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.reset;
@@ -182,10 +183,22 @@
}
@Test
+ public void testOnUserActivity_ignoresIfAlreadyDoneForThatNextScreenDimming() {
+ long when = registerAttention();
+ verify(mAttentionManagerInternal).checkAttention(anyLong(), any());
+ assertThat(when).isLessThan(mNextDimming);
+ clearInvocations(mAttentionManagerInternal);
+
+ long redundantWhen = mAttentionDetector.updateUserActivity(mNextDimming);
+ assertThat(redundantWhen).isEqualTo(mNextDimming);
+ verify(mAttentionManagerInternal, never()).checkAttention(anyLong(), any());
+ }
+
+ @Test
public void testOnUserActivity_skipsIfAlreadyScheduled() {
registerAttention();
reset(mAttentionManagerInternal);
- long when = mAttentionDetector.updateUserActivity(mNextDimming);
+ long when = mAttentionDetector.updateUserActivity(mNextDimming + 1);
verify(mAttentionManagerInternal, never()).checkAttention(anyLong(), any());
assertThat(when).isLessThan(mNextDimming);
}