Merge "Statsd alerts can inform subscribers probabilistically" (193fe201) · Commits · e / os / android_frameworks_base

cmds/statsd/src/anomaly/AnomalyTracker.cpp

+9 −1

Original line number	Diff line number	Diff line
		@@ -233,11 +233,19 @@ bool AnomalyTracker::isInRefractoryPeriod(const uint64_t& timestampNs,
		void AnomalyTracker::informSubscribers(const MetricDimensionKey& key) {
		VLOG("informSubscribers called.");
		if (mSubscriptions.empty()) {
		ALOGE("Attempt to call with no subscribers.");
		// The config just wanted to log the anomaly. That's fine.
		VLOG("No Subscriptions were associated with the alert.");
		return;
		}

		for (const Subscription& subscription : mSubscriptions) {
		if (subscription.probability_of_informing() < 1
		&& ((float)rand() / RAND_MAX) >= subscription.probability_of_informing()) {
		// Note that due to float imprecision, 0.0 and 1.0 might not truly mean never/always.
		// The config writer was advised to use -0.1 and 1.1 for never/always.
		ALOGI("Fate decided that a subscriber would not be informed.");
		continue;
		}
		switch (subscription.subscriber_information_case()) {
		case Subscription::SubscriberInformationCase::kIncidentdDetails:
		if (!GenerateIncidentReport(subscription.incidentd_details(), mAlert, mConfigKey)) {

+2 −0

Original line number	Diff line number	Diff line
		@@ -307,6 +307,8 @@ message Subscription {
		PerfettoDetails perfetto_details = 5;
		BroadcastSubscriberDetails broadcast_subscriber_details = 6;
		}

		optional float probability_of_informing = 7 [default = 1.1];
		}

		message StatsdConfig {