diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/com/android/server/connectivity/NetworkMonitor.java | 49 |
1 files changed, 35 insertions, 14 deletions
diff --git a/src/com/android/server/connectivity/NetworkMonitor.java b/src/com/android/server/connectivity/NetworkMonitor.java index a991156..e8fe2ca 100644 --- a/src/com/android/server/connectivity/NetworkMonitor.java +++ b/src/com/android/server/connectivity/NetworkMonitor.java @@ -377,6 +377,7 @@ public class NetworkMonitor extends StateMachine { private final int mDataStallMinEvaluateTime; private final int mDataStallValidDnsTimeThreshold; private final int mDataStallEvaluationType; + @Nullable private final DnsStallDetector mDnsStallDetector; private long mLastProbeTime; // Set to true if data stall is suspected and reset to false after metrics are sent to statsd. @@ -455,10 +456,11 @@ public class NetworkMonitor extends StateMachine { mRandom = deps.getRandom(); // TODO: Evaluate to move data stall configuration to a specific class. mConsecutiveDnsTimeoutThreshold = getConsecutiveDnsTimeoutThreshold(); - mDnsStallDetector = new DnsStallDetector(mConsecutiveDnsTimeoutThreshold); mDataStallMinEvaluateTime = getDataStallMinEvaluateTime(); mDataStallValidDnsTimeThreshold = getDataStallValidDnsTimeThreshold(); mDataStallEvaluationType = getDataStallEvaluationType(); + mDnsStallDetector = initDnsStallDetectorIfRequired(mDataStallEvaluationType, + mConsecutiveDnsTimeoutThreshold); mTcpTracker = tst; // Provide empty LinkProperties and NetworkCapabilities to make sure they are never null, @@ -628,9 +630,12 @@ public class NetworkMonitor extends StateMachine { return HANDLED; case CMD_FORCE_REEVALUATION: case CMD_CAPTIVE_PORTAL_RECHECK: - final int dnsCount = mDnsStallDetector.getConsecutiveTimeoutCount(); - validationLog("Forcing reevaluation for UID " + message.arg1 - + ". Dns signal count: " + dnsCount); + String msg = "Forcing reevaluation for UID " + message.arg1; + final DnsStallDetector dsd = getDnsStallDetector(); + if (dsd != null) { + msg += ". Dns signal count: " + dsd.getConsecutiveTimeoutCount(); + } + validationLog(msg); mUidResponsibleForReeval = message.arg1; transitionTo(mEvaluatingState); return HANDLED; @@ -713,7 +718,10 @@ public class NetworkMonitor extends StateMachine { break; } case EVENT_DNS_NOTIFICATION: - mDnsStallDetector.accumulateConsecutiveDnsTimeoutCount(message.arg1); + final DnsStallDetector detector = getDnsStallDetector(); + if (detector != null) { + detector.accumulateConsecutiveDnsTimeoutCount(message.arg1); + } break; // Set mAcceptPartialConnectivity to true and if network start evaluating or // re-evaluating and get the result of partial connectivity, ProbingState will @@ -777,7 +785,10 @@ public class NetworkMonitor extends StateMachine { transitionTo(mEvaluatingPrivateDnsState); break; case EVENT_DNS_NOTIFICATION: - mDnsStallDetector.accumulateConsecutiveDnsTimeoutCount(message.arg1); + final DnsStallDetector dsd = getDnsStallDetector(); + if (dsd == null) break; + + dsd.accumulateConsecutiveDnsTimeoutCount(message.arg1); if (evaluateDataStall()) { transitionTo(mEvaluatingState); } @@ -873,11 +884,13 @@ public class NetworkMonitor extends StateMachine { @VisibleForTesting protected void addDnsEvents(@NonNull final DataStallDetectionStats.Builder stats) { - final int size = mDnsStallDetector.mResultIndices.size(); + final DnsStallDetector dsd = getDnsStallDetector(); + if (dsd == null) return; + + final int size = dsd.mResultIndices.size(); for (int i = 1; i <= DEFAULT_DNS_LOG_SIZE && i <= size; i++) { - final int index = mDnsStallDetector.mResultIndices.indexOf(size - i); - stats.addDnsEvent(mDnsStallDetector.mDnsEvents[index].mReturnCode, - mDnsStallDetector.mDnsEvents[index].mTimeStamp); + final int index = dsd.mResultIndices.indexOf(size - i); + stats.addDnsEvent(dsd.mDnsEvents[index].mReturnCode, dsd.mDnsEvents[index].mTimeStamp); } } @@ -2218,6 +2231,7 @@ public class NetworkMonitor extends StateMachine { } @VisibleForTesting + @Nullable protected DnsStallDetector getDnsStallDetector() { return mDnsStallDetector; } @@ -2267,15 +2281,16 @@ public class NetworkMonitor extends StateMachine { // Check dns signal. Suspect it may be a data stall if both : // 1. The number of consecutive DNS query timeouts >= mConsecutiveDnsTimeoutThreshold. // 2. Those consecutive DNS queries happened in the last mValidDataStallDnsTimeThreshold ms. - if ((result == null) && dataStallEvaluateTypeEnabled(DATA_STALL_EVALUATION_TYPE_DNS)) { - if (mDnsStallDetector.isDataStallSuspected(mConsecutiveDnsTimeoutThreshold, + final DnsStallDetector dsd = getDnsStallDetector(); + if ((result == null) && (dsd != null) + && dataStallEvaluateTypeEnabled(DATA_STALL_EVALUATION_TYPE_DNS)) { + if (dsd.isDataStallSuspected(mConsecutiveDnsTimeoutThreshold, mDataStallValidDnsTimeThreshold)) { result = true; logNetworkEvent(NetworkEvent.NETWORK_CONSECUTIVE_DNS_TIMEOUT_FOUND); } if (DBG || VDBG_STALL) { - msg.add("consecutive dns timeout count=" - + mDnsStallDetector.getConsecutiveTimeoutCount()); + msg.add("consecutive dns timeout count=" + dsd.getConsecutiveTimeoutCount()); } } // log only data stall suspected. @@ -2426,4 +2441,10 @@ public class NetworkMonitor extends StateMachine { ShimUtils.isReleaseOrDevelopmentApiAbove(Build.VERSION_CODES.Q)), network) : null; } + + @Nullable + private DnsStallDetector initDnsStallDetectorIfRequired(int type, int threshold) { + return ((type & DATA_STALL_EVALUATION_TYPE_DNS) != 0) + ? new DnsStallDetector(threshold) : null; + } } |