Merge "Add dump() for WifiHealthMonitor" into rvc-dev am: 8d59b04a9d am: 5add8e5955

Change-Id: Ic03ca5a744b5bbb68230c0a7956cc1068441870f

3 files changed, 105 insertions, 47 deletions

diff --git a/service/java/com/android/server/wifi/ClientModeImpl.java b/service/java/com/android/server/wifi/ClientModeImpl.java
index 49edc366a..234b04799 100644
--- a/service/java/com/android/server/wifi/ClientModeImpl.java
+++ b/service/java/com/android/server/wifi/ClientModeImpl.java
@@ -27,7 +27,6 @@ import static android.net.wifi.WifiManager.WIFI_STATE_ENABLING;
 import static android.net.wifi.WifiManager.WIFI_STATE_UNKNOWN;
 
 import static com.android.server.wifi.WifiDataStall.INVALID_THROUGHPUT;
-import static com.android.server.wifi.WifiHealthMonitor.SCAN_RSSI_VALID_TIME_MS;
 
 import android.annotation.IntDef;
 import android.annotation.NonNull;
@@ -1875,6 +1874,7 @@ public class ClientModeImpl extends StateMachine {
         mWifiDiagnostics.dump(fd, pw, args);
         dumpIpClient(fd, pw, args);
         mWifiConnectivityManager.dump(fd, pw, args);
+        mWifiHealthMonitor.dump(fd, pw, args);
         mWifiInjector.getWakeupController().dump(fd, pw, args);
         mLinkProbeManager.dump(fd, pw, args);
         mWifiInjector.getWifiLastResortWatchdog().dump(fd, pw, args);
@@ -2950,7 +2950,8 @@ public class ClientModeImpl extends StateMachine {
             if (blocklistReason != -1) {
                 int networkId = (configuration == null) ? WifiConfiguration.INVALID_NETWORK_ID
                         : configuration.networkId;
-                int scanRssi = mWifiConfigManager.findScanRssi(networkId, SCAN_RSSI_VALID_TIME_MS);
+                int scanRssi = mWifiConfigManager.findScanRssi(networkId,
+                        mWifiHealthMonitor.getScanRssiValidTimeMs());
                 mWifiScoreCard.noteConnectionFailure(mWifiInfo, scanRssi, ssid, blocklistReason);
                 checkAbnormalConnectionFailureAndTakeBugReport(ssid);
                 boolean isLowRssi = false;
@@ -4062,7 +4063,8 @@ public class ClientModeImpl extends StateMachine {
                     }
                     mTargetNetworkId = netId;
                     // Update scorecard while there is still state from existing connection
-                    int scanRssi = mWifiConfigManager.findScanRssi(netId, SCAN_RSSI_VALID_TIME_MS);
+                    int scanRssi = mWifiConfigManager.findScanRssi(netId,
+                            mWifiHealthMonitor.getScanRssiValidTimeMs());
                     mWifiScoreCard.noteConnectionAttempt(mWifiInfo, scanRssi, config.SSID);
                     mBssidBlocklistMonitor.updateFirmwareRoamingConfiguration(config.SSID);
 
@@ -5470,7 +5472,8 @@ public class ClientModeImpl extends StateMachine {
                         loge("CMD_START_ROAM and no config, bail out...");
                         break;
                     }
-                    int scanRssi = mWifiConfigManager.findScanRssi(netId, SCAN_RSSI_VALID_TIME_MS);
+                    int scanRssi = mWifiConfigManager.findScanRssi(netId,
+                            mWifiHealthMonitor.getScanRssiValidTimeMs());
                     mWifiScoreCard.noteConnectionAttempt(mWifiInfo, scanRssi, config.SSID);
                     setTargetBssid(config, bssid);
                     mTargetNetworkId = netId;
diff --git a/service/java/com/android/server/wifi/WifiHealthMonitor.java b/service/java/com/android/server/wifi/WifiHealthMonitor.java
index 0b0c68d88..065ef3fd0 100644
--- a/service/java/com/android/server/wifi/WifiHealthMonitor.java
+++ b/service/java/com/android/server/wifi/WifiHealthMonitor.java
@@ -48,6 +48,8 @@ import com.android.server.wifi.util.ScanResultUtil;
 
 import com.google.protobuf.InvalidProtocolBufferException;
 
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
@@ -92,17 +94,14 @@ public class WifiHealthMonitor {
     private static final int MIN_NUM_BSSID_SCAN_2G = 2;
     // Minimum number of BSSIDs found above 2G with a normal scan
     private static final int MIN_NUM_BSSID_SCAN_ABOVE_2G = 2;
-    // Maximum scan RSSI valid time for scan RSSI search which is done by finding
-    // the maximum RSSI found among all valid scan detail entries of each network's scanDetailCache
-    // If a scanDetail is seen more than SCAN_RSSI_VALID_TIME_MS ago,
-    // it will not be considered valid anymore.
-    static final int SCAN_RSSI_VALID_TIME_MS = 6_000;
+    static final int DEFAULT_SCAN_RSSI_VALID_TIME_MS = 5_000;
+    static final int STATIONARY_SCAN_RSSI_VALID_TIME_MS = 20_000;
 
     // Minimum Tx speed in Mbps for disconnection stats collection
     // Disconnection events with Tx speed below this threshold are not
     // included in connection stats collection.
     static final int HEALTH_MONITOR_COUNT_TX_SPEED_MIN_MBPS = 54;
-    static final int HEALTH_MONITOR_COUNT_MIN_TX_RATE = 6;
+    static final int HEALTH_MONITOR_MIN_TX_PACKET_PER_SEC = 2;
     private final Context mContext;
     private final WifiConfigManager mWifiConfigManager;
     private final WifiScoreCard mWifiScoreCard;
@@ -126,6 +125,7 @@ public class WifiHealthMonitor {
     private int mNumNetworkSufficientRecentStatsOnly = 0;
     private int mNumNetworkSufficientRecentPrevStats = 0;
     private boolean mHasNewDataForWifiMetrics = false;
+    private int mDeviceMobilityState = WifiManager.DEVICE_MOBILITY_STATE_UNKNOWN;
 
     WifiHealthMonitor(Context context, WifiInjector wifiInjector, Clock clock,
             WifiConfigManager wifiConfigManager, WifiScoreCard wifiScoreCard, Handler handler,
@@ -211,10 +211,21 @@ public class WifiHealthMonitor {
      */
     public void setDeviceMobilityState(@DeviceMobilityState int newState) {
         logd("Device mobility state: " + newState);
+        mDeviceMobilityState = newState;
         mWifiSystemInfoStats.setMobilityState(newState);
     }
 
     /**
+     * Get the maximum scan RSSI valid time for scan RSSI search which is done by finding
+     * the maximum RSSI found among all valid scan detail entries of each network's scanDetailCache
+     * If a scanDetail was older than the returned value, it will not be considered valid.
+     */
+    public int getScanRssiValidTimeMs() {
+        return (mDeviceMobilityState == WifiManager.DEVICE_MOBILITY_STATE_STATIONARY)
+                ? STATIONARY_SCAN_RSSI_VALID_TIME_MS : DEFAULT_SCAN_RSSI_VALID_TIME_MS;
+    }
+
+    /**
      * Issue read request to prepare for post-boot detection.
      */
     private void requestReadForPostBootDetection() {
@@ -287,6 +298,34 @@ public class WifiHealthMonitor {
                 mPostBootDetectionListener, mHandler);
     }
 
+    /**
+     * Dump the internal state of WifiHealthMonitor.
+     */
+    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+        pw.println("Dump of WifiHealthMonitor");
+        pw.println("WifiHealthMonitor - Log Begin ----");
+        pw.println("System Info Stats");
+        pw.println(mWifiSystemInfoStats);
+        pw.println("configured network connection stats");
+        List<WifiConfiguration> configuredNetworks = mWifiConfigManager.getConfiguredNetworks();
+        for (WifiConfiguration network : configuredNetworks) {
+            if (isInvalidConfiguredNetwork(network)) continue;
+            PerNetwork perNetwork = mWifiScoreCard.lookupNetwork(network.SSID);
+            int cntName = WifiScoreCard.CNT_CONNECTION_ATTEMPT;
+            if (perNetwork.getStatsCurrBuild().getCount(cntName) > 0
+                    || perNetwork.getRecentStats().getCount(cntName) > 0) {
+                pw.println(mWifiScoreCard.lookupNetwork(network.SSID));
+            }
+        }
+        pw.println("networks with failure increase: ");
+        pw.println(mFailureStatsIncrease);
+        pw.println("networks with failure drop: ");
+        pw.println(mFailureStatsDecrease);
+        pw.println("networks with high failure without previous stats: ");
+        pw.println(mFailureStatsHigh);
+        pw.println("WifiHealthMonitor - Log End ----");
+    }
+
     private synchronized void dailyDetectionHandler() {
         logd("Run daily detection");
         // Clear daily detection result
@@ -301,10 +340,9 @@ public class WifiHealthMonitor {
         scheduleDailyDetectionAlarm(DAILY_DETECTION_INTERVAL_MS);
         List<WifiConfiguration> configuredNetworks = mWifiConfigManager.getConfiguredNetworks();
         for (WifiConfiguration network : configuredNetworks) {
-            if (isInValidConfiguredNetwork(network)) {
+            if (isInvalidConfiguredNetwork(network)) {
                 continue;
             }
-            logd(network.SSID);
             PerNetwork perNetwork = mWifiScoreCard.lookupNetwork(network.SSID);
 
             int detectionFlag = perNetwork.dailyDetection(mFailureStatsDecrease,
@@ -319,10 +357,10 @@ public class WifiHealthMonitor {
             connectionDurationSec += perNetwork.getRecentStats().getCount(
                     WifiScoreCard.CNT_CONNECTION_DURATION_SEC);
 
-            logd("before daily update: " + perNetwork.toString());
+            logd("before daily update: " + perNetwork);
             // Update historical stats with dailyStats and clear dailyStats
             perNetwork.updateAfterDailyDetection();
-            logd("after daily update: " + perNetwork.toString());
+            logd("after daily update: " + perNetwork);
         }
         logd("total connection duration: " + connectionDurationSec);
         logd("#networks w/ sufficient recent stats: " + mNumNetworkSufficientRecentStatsOnly);
@@ -413,7 +451,7 @@ public class WifiHealthMonitor {
         return stats;
     }
 
-    private boolean isInValidConfiguredNetwork(WifiConfiguration config) {
+    private boolean isInvalidConfiguredNetwork(WifiConfiguration config) {
         return (config == null || WifiManager.UNKNOWN_SSID.equals(config.SSID)
                 || config.SSID == null);
     }
@@ -454,7 +492,7 @@ public class WifiHealthMonitor {
     private void requestReadAllNetworks() {
         List<WifiConfiguration> configuredNetworks = mWifiConfigManager.getConfiguredNetworks();
         for (WifiConfiguration network : configuredNetworks) {
-            if (isInValidConfiguredNetwork(network)) {
+            if (isInvalidConfiguredNetwork(network)) {
                 continue;
             }
             logd(network.SSID);
@@ -475,15 +513,15 @@ public class WifiHealthMonitor {
     private void updateAllNetworkAfterSwBuildChange() {
         List<WifiConfiguration> configuredNetworks = mWifiConfigManager.getConfiguredNetworks();
         for (WifiConfiguration network : configuredNetworks) {
-            if (isInValidConfiguredNetwork(network)) {
+            if (isInvalidConfiguredNetwork(network)) {
                 continue;
             }
             logd(network.SSID);
             WifiScoreCard.PerNetwork perNetwork = mWifiScoreCard.lookupNetwork(network.SSID);
 
-            logd("before SW build update: " + perNetwork.toString());
+            logd("before SW build update: " + perNetwork);
             perNetwork.updateAfterSwBuildChange();
-            logd("after SW build update: " + perNetwork.toString());
+            logd("after SW build update: " + perNetwork);
         }
     }
 
@@ -575,6 +613,16 @@ public class WifiHealthMonitor {
         void incrementCount(@FailureReasonCode int reasonCode) {
             mCount[reasonCode]++;
         }
+
+        @Override
+        public String toString() {
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < NUMBER_FAILURE_REASON_CODE; i++) {
+                if (mCount[i] == 0) continue;
+                sb.append(FAILURE_REASON_NAME[i]).append(": ").append(mCount[i]).append(" ");
+            }
+            return sb.toString();
+        }
     }
     /**
      * A class maintaining current OS, Wifi APK, Wifi driver and firmware build version information.
@@ -701,8 +749,8 @@ public class WifiHealthMonitor {
                 return false;
             }
 
-            logd(" from Memory: " + mCurrSoftwareBuildInfo.toString());
-            logd(" from SW: " + currSoftwareBuildInfo.toString());
+            logd(" from Memory: " + mCurrSoftwareBuildInfo);
+            logd(" from SW: " + currSoftwareBuildInfo);
             return (!mCurrSoftwareBuildInfo.equals(currSoftwareBuildInfo));
         }
 
@@ -854,16 +902,19 @@ public class WifiHealthMonitor {
             StringBuilder sb = new StringBuilder();
             if (mCurrSoftwareBuildInfo != null) {
                 sb.append("current SW build: ");
-                sb.append(mCurrSoftwareBuildInfo.toString());
+                sb.append(mCurrSoftwareBuildInfo);
             }
             if (mPrevSoftwareBuildInfo != null) {
-                sb.append(" previous SW build: ");
-                sb.append(mPrevSoftwareBuildInfo.toString());
+                sb.append("\n");
+                sb.append("previous SW build: ");
+                sb.append(mPrevSoftwareBuildInfo);
             }
-            sb.append(" currScanStats: ");
-            sb.append(mCurrScanStats.toString());
-            sb.append(" prevScanStats: ");
-            sb.append(mPrevScanStats.toString());
+            sb.append("\n");
+            sb.append("currScanStats: ");
+            sb.append(mCurrScanStats);
+            sb.append("\n");
+            sb.append("prevScanStats: ");
+            sb.append(mPrevScanStats);
             return sb.toString();
         }
     }
diff --git a/service/java/com/android/server/wifi/WifiScoreCard.java b/service/java/com/android/server/wifi/WifiScoreCard.java
index 071b9634d..346a8febe 100644
--- a/service/java/com/android/server/wifi/WifiScoreCard.java
+++ b/service/java/com/android/server/wifi/WifiScoreCard.java
@@ -20,8 +20,8 @@ import static android.net.wifi.WifiInfo.DEFAULT_MAC_ADDRESS;
 import static android.net.wifi.WifiInfo.INVALID_RSSI;
 import static android.net.wifi.WifiInfo.LINK_SPEED_UNKNOWN;
 
-import static com.android.server.wifi.WifiHealthMonitor.HEALTH_MONITOR_COUNT_MIN_TX_RATE;
 import static com.android.server.wifi.WifiHealthMonitor.HEALTH_MONITOR_COUNT_TX_SPEED_MIN_MBPS;
+import static com.android.server.wifi.WifiHealthMonitor.HEALTH_MONITOR_MIN_TX_PACKET_PER_SEC;
 import static com.android.server.wifi.WifiHealthMonitor.REASON_ASSOC_REJECTION;
 import static com.android.server.wifi.WifiHealthMonitor.REASON_ASSOC_TIMEOUT;
 import static com.android.server.wifi.WifiHealthMonitor.REASON_AUTH_FAILURE;
@@ -70,6 +70,7 @@ import java.nio.ByteBuffer;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
+import java.util.Calendar;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
@@ -295,7 +296,7 @@ public class WifiScoreCard {
                 wifiInfo.getRssi(),
                 wifiInfo.getLinkSpeed());
         perBssid.setNetworkConfigId(wifiInfo.getNetworkId());
-        logd("BSSID update " + event.toString() + " ID: " + perBssid.id + " " + wifiInfo);
+        logd("BSSID update " + event + " ID: " + perBssid.id + " " + wifiInfo);
     }
 
     /**
@@ -305,7 +306,7 @@ public class WifiScoreCard {
     private void updatePerNetwork(WifiScoreCardProto.Event event, String ssid, int rssi,
             int txSpeed, int failureReason) {
         PerNetwork perNetwork = lookupNetwork(ssid);
-        logd("network update " + event.toString() + ((ssid == null) ? " " : " "
+        logd("network update " + event + ((ssid == null) ? " " : " "
                     + ssid) + " ID: " + perNetwork.id + " RSSI " + rssi + " txSpeed " + txSpeed);
         perNetwork.updateEventStats(event, rssi, txSpeed, failureReason);
     }
@@ -335,12 +336,12 @@ public class WifiScoreCard {
     }
 
     private int geTxLinkSpeedWithSufficientTxRate(@NonNull ExtendedWifiInfo wifiInfo) {
-        double txRate = wifiInfo.getSuccessfulTxPacketsPerSecond()
+        int txRate = (int) Math.ceil(wifiInfo.getSuccessfulTxPacketsPerSecond()
                 + wifiInfo.getLostTxPacketsPerSecond()
-                + wifiInfo.getRetriedTxPacketsPerSecond();
+                + wifiInfo.getRetriedTxPacketsPerSecond());
         int txSpeed = wifiInfo.getTxLinkSpeedMbps();
         logd("txRate: " + txRate + " txSpeed: " + txSpeed);
-        return (txRate >= HEALTH_MONITOR_COUNT_MIN_TX_RATE) ? txSpeed : LINK_SPEED_UNKNOWN;
+        return (txRate >= HEALTH_MONITOR_MIN_TX_PACKET_PER_SEC) ? txSpeed : LINK_SPEED_UNKNOWN;
     }
 
     /** Wait a few seconds before considering the roam successful */
@@ -915,15 +916,19 @@ public class WifiScoreCard {
         @Override
         public String toString() {
             StringBuilder sb = new StringBuilder();
-            sb.append(" LastRssiPollTime: " + mLastRssiPollTimeMs);
+            sb.append("SSID: ").append(ssid).append("\n");
+            Calendar c = Calendar.getInstance();
+            if (mLastRssiPollTimeMs != TS_NONE) {
+                sb.append(" LastRssiPollTime: ");
+                c.setTimeInMillis(mLastRssiPollTimeMs);
+                sb.append(String.format("%tm-%td %tH:%tM:%tS", c, c, c, c, c));
+            }
             sb.append(" LastRssiPoll: " + mLastRssiPoll);
             sb.append(" LastTxSpeedPoll: " + mLastTxSpeedPoll);
             sb.append("\n");
-            sb.append(" StatsRecent: " + mRecentStats.toString());
-            sb.append("\n");
-            sb.append(" StatsCurr: " + mStatsCurrBuild.toString());
-            sb.append("\n");
-            sb.append(" StatsPrev: " + mStatsPrevBuild.toString());
+            sb.append(" StatsRecent: ").append(mRecentStats).append("\n");
+            sb.append(" StatsCurr: ").append(mStatsCurrBuild).append("\n");
+            sb.append(" StatsPrev: ").append(mStatsPrevBuild);
             return sb.toString();
         }
         private void handleDisconnection() {
@@ -1023,12 +1028,11 @@ public class WifiScoreCard {
         private void dailyDetectionDisconnectionEvent(FailureStats statsDec, FailureStats statsInc,
                 FailureStats statsHigh) {
             // Skip daily detection if recentStats is not sufficient
-            if (mRecentStats.getCount(CNT_DISCONNECTION)
-                    < mDeviceConfigFacade.getHealthMonitorMinNumConnectionAttempt()) {
+            int minConnectAttempt = mDeviceConfigFacade.getHealthMonitorMinNumConnectionAttempt();
+            if (mRecentStats.getCount(CNT_CONNECTION_ATTEMPT) < minConnectAttempt) {
                 return;
             }
-            if (mStatsPrevBuild.getCount(CNT_DISCONNECTION)
-                    < mDeviceConfigFacade.getHealthMonitorMinNumConnectionAttempt()) {
+            if (mStatsPrevBuild.getCount(CNT_CONNECTION_ATTEMPT) < minConnectAttempt) {
                 recentStatsHighDetectionDisconnection(statsHigh);
             } else {
                 statsDeltaDetectionDisconnection(statsDec, statsInc);
@@ -1083,11 +1087,11 @@ public class WifiScoreCard {
             statsDeltaDetection(statsDec, statsInc, CNT_SHORT_CONNECTION_NONLOCAL,
                     REASON_SHORT_CONNECTION_NONLOCAL,
                     mDeviceConfigFacade.getShortConnectionNonlocalCountMin(),
-                    CNT_DISCONNECTION);
+                    CNT_CONNECTION_ATTEMPT);
             statsDeltaDetection(statsDec, statsInc, CNT_DISCONNECTION_NONLOCAL,
                     REASON_DISCONNECTION_NONLOCAL,
                     mDeviceConfigFacade.getDisconnectionNonlocalCountMin(),
-                    CNT_DISCONNECTION);
+                    CNT_CONNECTION_ATTEMPT);
         }
 
         private void recentStatsHighDetectionDisconnection(FailureStats statsHigh) {
@@ -1139,7 +1143,7 @@ public class WifiScoreCard {
             // Check R1 / R2 >= ratioThr
             return ((stats1.getCount(countCode) + 1) * (stats2.getCount(refCountCode) + 2)
                     * mDeviceConfigFacade.HEALTH_MONITOR_RATIO_THR_DENOMINATOR)
-                    >= ((stats1.getCount(refCountCode) + 1) * (stats2.getCount(countCode) + 2)
+                    >= ((stats1.getCount(refCountCode) + 2) * (stats2.getCount(countCode) + 1)
                     * mDeviceConfigFacade.getHealthMonitorRatioThrNumerator());
         }