* Use a slightly shorter interval with its own define for deviceBecam…

…eActive

  throttling.
* Log when we start throttling deviceBecameActive callbacks.

src/darwin/Framework/CHIP/MTRDevice_Concrete.mm

@@ -332,6 +332,7 @@ @interface MTRDevice_Concrete ()
 @property (nonatomic) NSDate * estimatedStartTimeFromGeneralDiagnosticsUpTime;
 
 @property (nonatomic) NSDate * lastDeviceBecameActiveCallbackTime;
+@property (nonatomic) BOOL throttlingDeviceBecameActiveCallbacks;
 
 /**
  * If currentReadClient is non-null, that means that we successfully
@@ -472,6 +473,7 @@ - (instancetype)initWithNodeID:(NSNumber *)nodeID controller:(MTRDeviceControlle
         _persistedClusters = [NSMutableSet set];
         _highestObservedEventNumber = nil;
         _matterCPPObjectsHolder = [[MTRDeviceMatterCPPObjectsHolder alloc] init];
+        _throttlingDeviceBecameActiveCallbacks = NO;
 
         // If there is a data store, make sure we have an observer to monitor system clock changes, so
         // NSDate-based write coalescing could be reset and not get into a bad state.
@@ -866,6 +868,7 @@ - (void)_setDSTOffsets:(NSArray<MTRTimeSynchronizationClusterDSTOffsetStruct *>
 // subscription intervals are in seconds
 #define MTR_DEVICE_SUBSCRIPTION_MAX_INTERVAL_MIN (10 * 60) // 10 minutes (for now)
 #define MTR_DEVICE_SUBSCRIPTION_MAX_INTERVAL_MAX (60 * 60) // 60 minutes
+#define MTR_DEVICE_MIN_SECONDS_BETWEEN_DEVICE_BECAME_ACTIVE_CALLBACKS (1 * 60) // 1 minute (for now)
 
 - (BOOL)_subscriptionsAllowed
 {
@@ -1640,7 +1643,7 @@ - (void)_handleUnsolicitedMessageFromPublisher
     BOOL shouldCallDelegate = NO;
     if (self.lastDeviceBecameActiveCallbackTime) {
         NSTimeInterval intervalSinceLastCallback = -[self.lastDeviceBecameActiveCallbackTime timeIntervalSinceNow];
-        if (intervalSinceLastCallback > MTR_DEVICE_SUBSCRIPTION_MAX_INTERVAL_MIN) {
+        if (intervalSinceLastCallback > MTR_DEVICE_MIN_SECONDS_BETWEEN_DEVICE_BECAME_ACTIVE_CALLBACKS) {
             shouldCallDelegate = YES;
         }
     } else {
@@ -1654,6 +1657,10 @@ - (void)_handleUnsolicitedMessageFromPublisher
             }
         }];
         self.lastDeviceBecameActiveCallbackTime = [NSDate now];
+        self.throttlingDeviceBecameActiveCallbacks = NO;
+    } else if (!self.throttlingDeviceBecameActiveCallbacks) {
+        MTR_LOG("%@ throttling deviceBecameActive callbacks because report came in too soon after %@", self, self.lastDeviceBecameActiveCallbackTime);
+        self.throttlingDeviceBecameActiveCallbacks = YES;
     }
 
     // in case this is called during exponential back off of subscription