Merge "Change the evaluation type collected to be a bitmask" am: b2357b114a... (4cba0554) · Commits · e / os / android_packages_modules_NetworkStack

src/android/net/util/DataStallUtils.java

+6 −5

Original line number	Diff line number	Diff line
		@@ -31,11 +31,12 @@ public class DataStallUtils {
		/** Detect data stall using tcp connection fail rate. */
		public static final int DATA_STALL_EVALUATION_TYPE_TCP = 1 << 1;

		@IntDef(prefix = { "DATA_STALL_EVALUATION_TYPE_" }, value = {
		@IntDef(prefix = { "DATA_STALL_EVALUATION_TYPE_" },
		flag = true,
		value = {
		DATA_STALL_EVALUATION_TYPE_NONE,
		DATA_STALL_EVALUATION_TYPE_DNS,
		DATA_STALL_EVALUATION_TYPE_TCP,
		})
		DATA_STALL_EVALUATION_TYPE_TCP, })
		@Retention(RetentionPolicy.SOURCE)
		public @interface EvaluationType {
		}

src/com/android/server/connectivity/NetworkMonitor.java

+36 −27

Original line number	Diff line number	Diff line
		@@ -493,7 +493,8 @@ public class NetworkMonitor extends StateMachine {
		@Nullable
		private final DnsStallDetector mDnsStallDetector;
		private long mLastProbeTime;
		// The signal causing a data stall to be suspected. Reset to 0 after metrics are sent to statsd.
		// A bitmask of signals causing a data stall to be suspected. Reset to
		// {@link DataStallUtils#DATA_STALL_EVALUATION_TYPE_NONE} after metrics are sent to statsd.
		private @EvaluationType int mDataStallTypeToCollect;
		private boolean mAcceptPartialConnectivity = false;
		private final EvaluationState mEvaluationState = new EvaluationState();
		@@ -3206,7 +3207,8 @@ public class NetworkMonitor extends StateMachine {
		return false;
		}

		Boolean result = null;
		int typeToCollect = 0;
		final int notStall = -1;
		final StringJoiner msg = (DBG \|\| VDBG_STALL) ? new StringJoiner(", ") : null;
		// Reevaluation will generate traffic. Thus, set a minimal reevaluation timer to limit the
		// possible traffic cost in metered network.
		@@ -3221,18 +3223,9 @@ public class NetworkMonitor extends StateMachine {
		final TcpSocketTracker tst = getTcpSocketTracker();
		if (dataStallEvaluateTypeEnabled(DATA_STALL_EVALUATION_TYPE_TCP) && tst != null) {
		if (tst.getLatestReceivedCount() > 0) {
		result = false;
		typeToCollect = notStall;
		} else if (tst.isDataStallSuspected()) {
		result = true;
		mDataStallTypeToCollect = DATA_STALL_EVALUATION_TYPE_TCP;

		final DataStallReportParcelable p = new DataStallReportParcelable();
		p.detectionMethod = DETECTION_METHOD_TCP_METRICS;
		p.timestampMillis = SystemClock.elapsedRealtime();
		p.tcpPacketFailRate = tst.getLatestPacketFailPercentage();
		p.tcpMetricsCollectionPeriodMillis = getTcpPollingInterval();

		notifyDataStallSuspected(p);
		typeToCollect \|= DATA_STALL_EVALUATION_TYPE_TCP;
		}
		if (DBG \|\| VDBG_STALL) {
		msg.add("tcp packets received=" + tst.getLatestReceivedCount())
		@@ -3244,32 +3237,48 @@ public class NetworkMonitor extends StateMachine {
		// 1. The number of consecutive DNS query timeouts >= mConsecutiveDnsTimeoutThreshold.
		// 2. Those consecutive DNS queries happened in the last mValidDataStallDnsTimeThreshold ms.
		final DnsStallDetector dsd = getDnsStallDetector();
		if ((result == null) && (dsd != null)
		if ((typeToCollect != notStall) && (dsd != null)
		&& dataStallEvaluateTypeEnabled(DATA_STALL_EVALUATION_TYPE_DNS)) {
		if (dsd.isDataStallSuspected(mConsecutiveDnsTimeoutThreshold,
		mDataStallValidDnsTimeThreshold)) {
		result = true;
		mDataStallTypeToCollect = DATA_STALL_EVALUATION_TYPE_DNS;
		if (dsd.isDataStallSuspected(
		mConsecutiveDnsTimeoutThreshold, mDataStallValidDnsTimeThreshold)) {
		typeToCollect \|= DATA_STALL_EVALUATION_TYPE_DNS;
		logNetworkEvent(NetworkEvent.NETWORK_CONSECUTIVE_DNS_TIMEOUT_FOUND);
		}
		if (DBG \|\| VDBG_STALL) {
		msg.add("consecutive dns timeout count=" + dsd.getConsecutiveTimeoutCount());
		}
		}

		if (typeToCollect > 0) {
		mDataStallTypeToCollect = typeToCollect;
		final DataStallReportParcelable p = new DataStallReportParcelable();
		p.detectionMethod = DETECTION_METHOD_DNS_EVENTS;
		int detectionMethod = 0;
		p.timestampMillis = SystemClock.elapsedRealtime();
		if (isDataStallTypeDetected(typeToCollect, DATA_STALL_EVALUATION_TYPE_DNS)) {
		detectionMethod \|= DETECTION_METHOD_DNS_EVENTS;
		p.dnsConsecutiveTimeouts = mDnsStallDetector.getConsecutiveTimeoutCount();
		notifyDataStallSuspected(p);
		}
		if (DBG \|\| VDBG_STALL) {
		msg.add("consecutive dns timeout count=" + dsd.getConsecutiveTimeoutCount());

		if (isDataStallTypeDetected(typeToCollect, DATA_STALL_EVALUATION_TYPE_TCP)) {
		detectionMethod \|= DETECTION_METHOD_TCP_METRICS;
		p.tcpPacketFailRate = tst.getLatestPacketFailPercentage();
		p.tcpMetricsCollectionPeriodMillis = getTcpPollingInterval();
		}
		p.detectionMethod = detectionMethod;
		notifyDataStallSuspected(p);
		}

		// log only data stall suspected.
		if ((DBG && Boolean.TRUE.equals(result)) \|\| VDBG_STALL) {
		log("isDataStall: result=" + result + ", " + msg);
		if ((DBG && (typeToCollect > 0)) \|\| VDBG_STALL) {
		log("isDataStall: result=" + typeToCollect + ", " + msg);
		}

		return (result == null) ? false : result;
		return typeToCollect > 0;
		}

		private static boolean isDataStallTypeDetected(int typeToCollect, int evaluationType) {
		return (typeToCollect & evaluationType) != 0;
		}
		// Class to keep state of evaluation results and probe results.
		//
		// The main purpose was to ensure NetworkMonitor can notify ConnectivityService of probe results

tests/unit/src/com/android/server/connectivity/NetworkMonitorTest.java

+28 −2

Original line number	Diff line number	Diff line
		@@ -1618,6 +1618,25 @@ public class NetworkMonitorTest {
		verify(mCallbacks).notifyDataStallSuspected(matchTcpDataStallParcelable());
		}

		@Test
		public void testIsDataStall_EvaluationDnsAndTcp() throws Exception {
		setDataStallEvaluationType(DATA_STALL_EVALUATION_TYPE_DNS \| DATA_STALL_EVALUATION_TYPE_TCP);
		setupTcpDataStall();
		final WrappedNetworkMonitor nm = makeMonitor(CELL_METERED_CAPABILITIES);
		nm.setLastProbeTime(SystemClock.elapsedRealtime() - 1000);
		makeDnsTimeoutEvent(nm, DEFAULT_DNS_TIMEOUT_THRESHOLD);
		assertTrue(nm.isDataStall());
		verify(mCallbacks).notifyDataStallSuspected(
		matchDnsAndTcpDataStallParcelable(DEFAULT_DNS_TIMEOUT_THRESHOLD));

		when(mTst.getLatestReceivedCount()).thenReturn(5);
		// Trigger a tcp event immediately.
		setTcpPollingInterval(0);
		nm.sendTcpPollingEvent();
		HandlerUtilsKt.waitForIdle(nm.getHandler(), HANDLER_TIMEOUT_MS);
		assertFalse(nm.isDataStall());
		}

		@Test
		public void testIsDataStall_DisableTcp() {
		// Disable tcp detection with only DNS detect. keep the tcp signal but set to no DNS signal.
		@@ -2657,13 +2676,20 @@ public class NetworkMonitorTest {
		&& Objects.equals(p.redirectUrl, redirectUrl));
		}

		private DataStallReportParcelable matchDnsAndTcpDataStallParcelable(final int timeoutCount) {
		return argThat(p ->
		(p.detectionMethod & ConstantsShim.DETECTION_METHOD_DNS_EVENTS) != 0
		&& (p.detectionMethod & ConstantsShim.DETECTION_METHOD_TCP_METRICS) != 0
		&& p.dnsConsecutiveTimeouts == timeoutCount);
		}

		private DataStallReportParcelable matchDnsDataStallParcelable(final int timeoutCount) {
		return argThat(p -> p.detectionMethod == ConstantsShim.DETECTION_METHOD_DNS_EVENTS
		return argThat(p -> (p.detectionMethod & ConstantsShim.DETECTION_METHOD_DNS_EVENTS) != 0
		&& p.dnsConsecutiveTimeouts == timeoutCount);
		}

		private DataStallReportParcelable matchTcpDataStallParcelable() {
		return argThat(p -> p.detectionMethod == ConstantsShim.DETECTION_METHOD_TCP_METRICS);
		return argThat(p -> (p.detectionMethod & ConstantsShim.DETECTION_METHOD_TCP_METRICS) != 0);
		}
		}