metrics: Watchdog success delay

Tracks how long it takes for wifi to connect after a watchdog trigger.

Bug: 75001353
Test: compile, run ./frameworks/opt/net/wifi/tests/wifitests/runtests.sh

Change-Id: Iad9a20b38ad92d76cfc46d9fd01f2f565e9a22d0

3 files changed, 19 insertions, 3 deletions

diff --git a/service/java/com/android/server/wifi/WifiInjector.java b/service/java/com/android/server/wifi/WifiInjector.java
index 82f7d6cb2..3ebfe2ccd 100644
--- a/service/java/com/android/server/wifi/WifiInjector.java
+++ b/service/java/com/android/server/wifi/WifiInjector.java
@@ -284,8 +284,8 @@ public class WifiInjector {
                 mSettingsStore, mWifiServiceHandlerThread.getLooper(), mFrameworkFacade,
                 mWifiStateMachinePrime);
         mSelfRecovery = new SelfRecovery(mWifiController, mClock);
-        mWifiLastResortWatchdog = new WifiLastResortWatchdog(mSelfRecovery, mWifiMetrics,
-                mWifiStateMachine, wifiStateMachineLooper);
+        mWifiLastResortWatchdog = new WifiLastResortWatchdog(mSelfRecovery, mClock,
+                mWifiMetrics, mWifiStateMachine, wifiStateMachineLooper);
         mWifiMulticastLockManager = new WifiMulticastLockManager(
                 mWifiStateMachine.getMcastLockManagerFilterController(),
                 BatteryStatsService.getService());
diff --git a/service/java/com/android/server/wifi/WifiLastResortWatchdog.java b/service/java/com/android/server/wifi/WifiLastResortWatchdog.java
index f759b1782..38f1be092 100644
--- a/service/java/com/android/server/wifi/WifiLastResortWatchdog.java
+++ b/service/java/com/android/server/wifi/WifiLastResortWatchdog.java
@@ -90,16 +90,19 @@ public class WifiLastResortWatchdog {
     // Is Watchdog allowed to trigger now? Set to false after triggering. Set to true after
     // successfully connecting or a new network (SSID) becomes available to connect to.
     private boolean mWatchdogAllowedToTrigger = true;
+    private long mTimeLastTrigger;
 
     private SelfRecovery mSelfRecovery;
     private WifiMetrics mWifiMetrics;
     private WifiStateMachine mWifiStateMachine;
     private Looper mWifiStateMachineLooper;
     private double mBugReportProbability = PROB_TAKE_BUGREPORT_DEFAULT;
+    private Clock mClock;
 
-    WifiLastResortWatchdog(SelfRecovery selfRecovery, WifiMetrics wifiMetrics,
+    WifiLastResortWatchdog(SelfRecovery selfRecovery, Clock clock, WifiMetrics wifiMetrics,
             WifiStateMachine wsm, Looper wifiStateMachineLooper) {
         mSelfRecovery = selfRecovery;
+        mClock = clock;
         mWifiMetrics = wifiMetrics;
         mWifiStateMachine = wsm;
         mWifiStateMachineLooper = wifiStateMachineLooper;
@@ -223,6 +226,7 @@ public class WifiLastResortWatchdog {
             Log.e(TAG, "Watchdog triggering recovery");
             mSsidAvailableAtFailure.clear();
             mSsidAvailableAtFailure.addAll(mSsidFailureCount.keySet());
+            mTimeLastTrigger = mClock.getElapsedSinceBootMillis();
             mSelfRecovery.trigger(SelfRecovery.REASON_LAST_RESORT_WATCHDOG);
             // increment various watchdog trigger count stats
             incrementWifiMetricsTriggerCounts();
@@ -249,6 +253,8 @@ public class WifiLastResortWatchdog {
             // WiFi has connected after a Watchdog trigger, without any new networks becoming
             // available, log a Watchdog success in wifi metrics
             mWifiMetrics.incrementNumLastResortWatchdogSuccesses();
+            long durationMs = mClock.getElapsedSinceBootMillis() - mTimeLastTrigger;
+            mWifiMetrics.setWatchdogSuccessTimeDurationMs(durationMs);
             if (mSsidAvailableAtFailure.contains(ssid)) {
                 Log.e(TAG, "Wifi failed to connect on " + mSsidAvailableAtFailure.size()
                         + " networks but was able to reconnect to one of them after a restart.");
diff --git a/service/java/com/android/server/wifi/WifiMetrics.java b/service/java/com/android/server/wifi/WifiMetrics.java
index ea04f2f73..584e51043 100644
--- a/service/java/com/android/server/wifi/WifiMetrics.java
+++ b/service/java/com/android/server/wifi/WifiMetrics.java
@@ -1144,6 +1144,16 @@ public class WifiMetrics {
     }
 
     /**
+     * Sets the time taken for wifi to connect after a watchdog triggers a restart.
+     * @param milliseconds
+     */
+    public void setWatchdogSuccessTimeDurationMs(long ms) {
+        synchronized (mLock) {
+            mWifiLogProto.watchdogTriggerToConnectionSuccessDurationMs = ms;
+        }
+    }
+
+    /**
      * Increments the count of alerts by alert reason.
      *
      * @param reason The cause of the alert. The reason values are driver-specific.