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Trusted Hotword: Allow disabling periodic restarts.

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Mitigates quality risk that may arise due to mismanaged state around the
restarts (either on the platform or application side).

The duration will be flag-controlled in a follow-up cl so it can
actually be disabled by flag.

Bug: 224618257
Test: manual
Change-Id: I3b17b47fab4120b42d75443b213be3c1ef5491aa
(cherry picked from commit b8cd0a4286)
Merged-in: I3b17b47fab4120b42d75443b213be3c1ef5491aa
This commit is contained in:
Ahaan Ugale
2022-03-14 22:51:10 -07:00
parent 0c19f57c37
commit fc651fe0d2
1 changed files with 24 additions and 12 deletions
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36
services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordDetectionConnection.java
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@@ -115,6 +115,11 @@ final class HotwordDetectionConnection {
private static final Duration MAX_UPDATE_TIMEOUT_DURATION =
Duration.ofMillis(MAX_UPDATE_TIMEOUT_MILLIS);
private static final long RESET_DEBUG_HOTWORD_LOGGING_TIMEOUT_MILLIS = 60 * 60 * 1000; // 1 hour
/**
* Time after which each HotwordDetectionService process is stopped and replaced by a new one.
* 0 indicates no restarts.
*/
private static final int RESTART_PERIOD_SECONDS = 3600; // 60 minutes
private static final int MAX_ISOLATED_PROCESS_NUMBER = 10;
// Hotword metrics
@@ -133,6 +138,7 @@ final class HotwordDetectionConnection {
// TODO: This may need to be a Handler(looper)
private final ScheduledExecutorService mScheduledExecutorService =
Executors.newSingleThreadScheduledExecutor();
@Nullable private final ScheduledFuture<?> mCancellationTaskFuture;
private final AtomicBoolean mUpdateStateAfterStartFinished = new AtomicBoolean(false);
private final IBinder.DeathRecipient mAudioServerDeathRecipient = this::audioServerDied;
private final @NonNull ServiceConnectionFactory mServiceConnectionFactory;
@@ -148,7 +154,6 @@ final class HotwordDetectionConnection {
private IMicrophoneHotwordDetectionVoiceInteractionCallback mSoftwareCallback;
private Instant mLastRestartInstant;
private ScheduledFuture<?> mCancellationTaskFuture;
private ScheduledFuture<?> mCancellationKeyPhraseDetectionFuture;
private ScheduledFuture<?> mDebugHotwordLoggingTimeoutFuture = null;
@@ -194,16 +199,20 @@ final class HotwordDetectionConnection {
mLastRestartInstant = Instant.now();
updateStateAfterProcessStart(options, sharedMemory);
// TODO(volnov): we need to be smarter here, e.g. schedule it a bit more often, but wait
// until the current session is closed.
mCancellationTaskFuture = mScheduledExecutorService.scheduleAtFixedRate(() -> {
Slog.v(TAG, "Time to restart the process, TTL has passed");
synchronized (mLock) {
restartProcessLocked();
HotwordMetricsLogger.writeServiceRestartEvent(mDetectorType,
HOTWORD_DETECTION_SERVICE_RESTARTED__REASON__SCHEDULE);
}
}, 30, 30, TimeUnit.MINUTES);
if (RESTART_PERIOD_SECONDS <= 0) {
mCancellationTaskFuture = null;
} else {
// TODO(volnov): we need to be smarter here, e.g. schedule it a bit more often, but wait
// until the current session is closed.
mCancellationTaskFuture = mScheduledExecutorService.scheduleAtFixedRate(() -> {
Slog.v(TAG, "Time to restart the process, TTL has passed");
synchronized (mLock) {
restartProcessLocked();
HotwordMetricsLogger.writeServiceRestartEvent(mDetectorType,
HOTWORD_DETECTION_SERVICE_RESTARTED__REASON__SCHEDULE);
}
}, RESTART_PERIOD_SECONDS, RESTART_PERIOD_SECONDS, TimeUnit.SECONDS);
}
}
private void initAudioFlingerLocked() {
@@ -341,7 +350,9 @@ final class HotwordDetectionConnection {
.setHotwordDetectionServiceProvider(null);
mIdentity = null;
updateServiceUidForAudioPolicy(Process.INVALID_UID);
mCancellationTaskFuture.cancel(/* may interrupt */ true);
if (mCancellationTaskFuture != null) {
mCancellationTaskFuture.cancel(/* may interrupt */ true);
}
if (mAudioFlinger != null) {
mAudioFlinger.unlinkToDeath(mAudioServerDeathRecipient, /* flags= */ 0);
}
@@ -759,6 +770,7 @@ final class HotwordDetectionConnection {
}
public void dump(String prefix, PrintWriter pw) {
pw.print(prefix); pw.print("RESTART_PERIOD_SECONDS="); pw.println(RESTART_PERIOD_SECONDS);
pw.print(prefix);
pw.print("mBound=" + mRemoteHotwordDetectionService.isBound());
pw.print(", mValidatingDspTrigger=" + mValidatingDspTrigger);