diff --git a/core/java/com/android/server/BootReceiver.java b/core/java/com/android/server/BootReceiver.java
index 18990cf..4354486 100644
--- a/core/java/com/android/server/BootReceiver.java
+++ b/core/java/com/android/server/BootReceiver.java
@@ -31,13 +31,13 @@
 import android.os.SystemProperties;
 import android.os.storage.StorageManager;
 import android.provider.Downloads;
+import android.text.TextUtils;
 import android.util.AtomicFile;
 import android.util.Slog;
 import android.util.Xml;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.logging.MetricsLogger;
-import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.FastXmlSerializer;
 import com.android.internal.util.XmlUtils;
 
@@ -106,6 +106,11 @@
             "powerctl_shutdown_time_ms:([0-9]+):([0-9]+)";
     private static final int UMOUNT_STATUS_NOT_AVAILABLE = 4; // should match with init/reboot.h
 
+    // Location of file with metrics recorded during shutdown
+    private static final String SHUTDOWN_METRICS_FILE = "/data/system/shutdown-metrics.txt";
+
+    private static final String SHUTDOWN_TRON_METRICS_PREFIX = "shutdown_";
+
     @Override
     public void onReceive(final Context context, Intent intent) {
         // Log boot events in the background to avoid blocking the main thread with I/O
@@ -232,6 +237,7 @@
         logFsShutdownTime();
         logFsMountTime();
         addFsckErrorsToDropBoxAndLogFsStat(db, timestamps, headers, -LOG_SIZE, "SYSTEM_FSCK");
+        logSystemServerShutdownTimeMetrics();
 
         // Scan existing tombstones (in case any new ones appeared)
         File[] tombstoneFiles = TOMBSTONE_DIR.listFiles();
@@ -380,6 +386,47 @@
         }
     }
 
+    // TODO b/64815357 Move to bootstat.cpp and log AbsoluteRebootTime
+    private static void logSystemServerShutdownTimeMetrics() {
+        File metricsFile = new File(SHUTDOWN_METRICS_FILE);
+        String metricsStr = null;
+        if (metricsFile.exists()) {
+            try {
+                metricsStr = FileUtils.readTextFile(metricsFile, 0, null);
+            } catch (IOException e) {
+                Slog.e(TAG, "Problem reading " + metricsFile, e);
+            }
+        }
+        if (!TextUtils.isEmpty(metricsStr)) {
+            String[] array = metricsStr.split(",");
+            for (String keyValueStr : array) {
+                String[] keyValue = keyValueStr.split(":");
+                if (keyValue.length != 2) {
+                    Slog.e(TAG, "Wrong format of shutdown metrics - " + metricsStr);
+                    continue;
+                }
+                // Ignore keys that are not indended for tron
+                if (keyValue[0].startsWith(SHUTDOWN_TRON_METRICS_PREFIX)) {
+                    logTronShutdownMetric(keyValue[0], keyValue[1]);
+                }
+            }
+        }
+        metricsFile.delete();
+    }
+
+    private static void logTronShutdownMetric(String metricName, String valueStr) {
+        int value;
+        try {
+            value = Integer.parseInt(valueStr);
+        } catch (NumberFormatException e) {
+            Slog.e(TAG, "Cannot parse metric " + metricName + " int value - " + valueStr);
+            return;
+        }
+        if (value >= 0) {
+            MetricsLogger.histogram(null, metricName, value);
+        }
+    }
+
     private static void logFsShutdownTime() {
         File f = null;
         for (String fileName : LAST_KMSG_FILES) {
diff --git a/services/core/java/com/android/server/power/ShutdownThread.java b/services/core/java/com/android/server/power/ShutdownThread.java
index 63900e0..0867a6c 100644
--- a/services/core/java/com/android/server/power/ShutdownThread.java
+++ b/services/core/java/com/android/server/power/ShutdownThread.java
@@ -51,6 +51,7 @@
 import android.os.Vibrator;
 import android.os.storage.IStorageManager;
 import android.os.storage.IStorageShutdownObserver;
+import android.util.ArrayMap;
 import android.util.Log;
 import android.util.TimingsTraceLog;
 import android.view.WindowManager;
@@ -62,7 +63,9 @@
 import com.android.server.statusbar.StatusBarManagerInternal;
 
 import java.io.File;
+import java.io.FileOutputStream;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 
 public final class ShutdownThread extends Thread {
     // constants
@@ -110,6 +113,23 @@
     private static final TimingsTraceLog SHUTDOWN_TIMINGS_LOG = new TimingsTraceLog(
             "ShutdownTiming", Trace.TRACE_TAG_SYSTEM_SERVER);
 
+    // Metrics that will be reported to tron after reboot
+    private static final ArrayMap<String, Long> TRON_METRICS = new ArrayMap<>();
+
+    // File to use for save metrics
+    private static final String METRICS_FILE_BASENAME = "/data/system/shutdown-metrics";
+
+    // Metrics names to be persisted in shutdown-metrics file
+    private static String METRIC_SYSTEM_SERVER = "shutdown_system_server";
+    private static String METRIC_SEND_BROADCAST = "shutdown_send_shutdown_broadcast";
+    private static String METRIC_AM = "shutdown_activity_manager";
+    private static String METRIC_PM = "shutdown_package_manager";
+    private static String METRIC_RADIOS = "shutdown_radios";
+    private static String METRIC_BT = "shutdown_bt";
+    private static String METRIC_RADIO = "shutdown_radio";
+    private static String METRIC_NFC = "shutdown_nfc";
+    private static String METRIC_SM = "shutdown_storage_manager";
+
     private final Object mActionDoneSync = new Object();
     private boolean mActionDone;
     private Context mContext;
@@ -349,6 +369,7 @@
 
     private static void beginShutdownSequence(Context context) {
         SHUTDOWN_TIMINGS_LOG.traceBegin("SystemServerShutdown");
+        metricStarted(METRIC_SYSTEM_SERVER);
         synchronized (sIsStartedGuard) {
             if (sIsStarted) {
                 Log.d(TAG, "Shutdown sequence already running, returning.");
@@ -430,6 +451,7 @@
             SystemProperties.set(REBOOT_SAFEMODE_PROPERTY, "1");
         }
 
+        metricStarted(METRIC_SEND_BROADCAST);
         SHUTDOWN_TIMINGS_LOG.traceBegin("SendShutdownBroadcast");
         Log.i(TAG, "Sending shutdown broadcast...");
 
@@ -463,9 +485,11 @@
             sInstance.setRebootProgress(BROADCAST_STOP_PERCENT, null);
         }
         SHUTDOWN_TIMINGS_LOG.traceEnd(); // SendShutdownBroadcast
+        metricEnded(METRIC_SEND_BROADCAST);
 
         Log.i(TAG, "Shutting down activity manager...");
         SHUTDOWN_TIMINGS_LOG.traceBegin("ShutdownActivityManager");
+        metricStarted(METRIC_AM);
 
         final IActivityManager am =
                 IActivityManager.Stub.asInterface(ServiceManager.checkService("activity"));
@@ -478,10 +502,12 @@
         if (mRebootHasProgressBar) {
             sInstance.setRebootProgress(ACTIVITY_MANAGER_STOP_PERCENT, null);
         }
-        SHUTDOWN_TIMINGS_LOG.traceEnd(); // ShutdownActivityManager
+        SHUTDOWN_TIMINGS_LOG.traceEnd();// ShutdownActivityManager
+        metricEnded(METRIC_AM);
 
         Log.i(TAG, "Shutting down package manager...");
         SHUTDOWN_TIMINGS_LOG.traceBegin("ShutdownPackageManager");
+        metricStarted(METRIC_PM);
 
         final PackageManagerService pm = (PackageManagerService)
             ServiceManager.getService("package");
@@ -492,14 +518,17 @@
             sInstance.setRebootProgress(PACKAGE_MANAGER_STOP_PERCENT, null);
         }
         SHUTDOWN_TIMINGS_LOG.traceEnd(); // ShutdownPackageManager
+        metricEnded(METRIC_PM);
 
         // Shutdown radios.
         SHUTDOWN_TIMINGS_LOG.traceBegin("ShutdownRadios");
+        metricStarted(METRIC_RADIOS);
         shutdownRadios(MAX_RADIO_WAIT_TIME);
         if (mRebootHasProgressBar) {
             sInstance.setRebootProgress(RADIO_STOP_PERCENT, null);
         }
         SHUTDOWN_TIMINGS_LOG.traceEnd(); // ShutdownRadios
+        metricEnded(METRIC_RADIOS);
 
         // Shutdown StorageManagerService to ensure media is in a safe state
         IStorageShutdownObserver observer = new IStorageShutdownObserver.Stub() {
@@ -511,6 +540,7 @@
 
         Log.i(TAG, "Shutting down StorageManagerService");
         SHUTDOWN_TIMINGS_LOG.traceBegin("ShutdownStorageManager");
+        metricStarted(METRIC_SM);
 
         // Set initial variables and time out time.
         mActionDone = false;
@@ -546,6 +576,7 @@
             }
         }
         SHUTDOWN_TIMINGS_LOG.traceEnd(); // ShutdownStorageManager
+        metricEnded(METRIC_SM);
 
         if (mRebootHasProgressBar) {
             sInstance.setRebootProgress(MOUNT_SERVICE_STOP_PERCENT, null);
@@ -558,6 +589,14 @@
         rebootOrShutdown(mContext, mReboot, mReason);
     }
 
+    private static void metricStarted(String metricKey) {
+        TRON_METRICS.put(metricKey, -1 * SystemClock.elapsedRealtime());
+    }
+
+    private static void metricEnded(String metricKey) {
+        TRON_METRICS.put(metricKey, SystemClock.elapsedRealtime() + TRON_METRICS.get(metricKey));
+    }
+
     private void setRebootProgress(final int progress, final CharSequence message) {
         mHandler.post(new Runnable() {
             @Override
@@ -590,12 +629,12 @@
                 final IBluetoothManager bluetooth =
                         IBluetoothManager.Stub.asInterface(ServiceManager.checkService(
                                 BluetoothAdapter.BLUETOOTH_MANAGER_SERVICE));
-                final long nfcShutdownStarted = SystemClock.elapsedRealtime();
                 try {
                     nfcOff = nfc == null ||
                              nfc.getState() == NfcAdapter.STATE_OFF;
                     if (!nfcOff) {
                         Log.w(TAG, "Turning off NFC...");
+                        metricStarted(METRIC_NFC);
                         nfc.disable(false); // Don't persist new state
                     }
                 } catch (RemoteException ex) {
@@ -603,12 +642,12 @@
                     nfcOff = true;
                 }
 
-                final long btShutdownStarted = SystemClock.elapsedRealtime();
                 try {
                     bluetoothReadyForShutdown = bluetooth == null ||
                             bluetooth.getState() == BluetoothAdapter.STATE_OFF;
                     if (!bluetoothReadyForShutdown) {
                         Log.w(TAG, "Disabling Bluetooth...");
+                        metricStarted(METRIC_BT);
                         bluetooth.disable(mContext.getPackageName(), false);  // disable but don't persist new state
                     }
                 } catch (RemoteException ex) {
@@ -616,11 +655,11 @@
                     bluetoothReadyForShutdown = true;
                 }
 
-                final long radioShutdownStarted = SystemClock.elapsedRealtime();
                 try {
                     radioOff = phone == null || !phone.needMobileRadioShutdown();
                     if (!radioOff) {
                         Log.w(TAG, "Turning off cellular radios...");
+                        metricStarted(METRIC_RADIO);
                         phone.shutdownMobileRadios();
                     }
                 } catch (RemoteException ex) {
@@ -653,8 +692,9 @@
                         }
                         if (bluetoothReadyForShutdown) {
                             Log.i(TAG, "Bluetooth turned off.");
-                            SHUTDOWN_TIMINGS_LOG.logDuration("ShutdownBt",
-                                    SystemClock.elapsedRealtime() - btShutdownStarted);
+                            metricEnded(METRIC_BT);
+                            SHUTDOWN_TIMINGS_LOG
+                                    .logDuration("ShutdownBt", TRON_METRICS.get(METRIC_BT));
                         }
                     }
                     if (!radioOff) {
@@ -666,8 +706,9 @@
                         }
                         if (radioOff) {
                             Log.i(TAG, "Radio turned off.");
-                            SHUTDOWN_TIMINGS_LOG.logDuration("ShutdownRadio",
-                                    SystemClock.elapsedRealtime() - radioShutdownStarted);
+                            metricEnded(METRIC_RADIO);
+                            SHUTDOWN_TIMINGS_LOG
+                                    .logDuration("ShutdownRadio", TRON_METRICS.get(METRIC_RADIO));
                         }
                     }
                     if (!nfcOff) {
@@ -679,8 +720,9 @@
                         }
                         if (nfcOff) {
                             Log.i(TAG, "NFC turned off.");
-                            SHUTDOWN_TIMINGS_LOG.logDuration("ShutdownNfc",
-                                    SystemClock.elapsedRealtime() - nfcShutdownStarted);
+                            metricEnded(METRIC_NFC);
+                            SHUTDOWN_TIMINGS_LOG
+                                    .logDuration("ShutdownNfc", TRON_METRICS.get(METRIC_NFC));
                         }
                     }
 
@@ -708,7 +750,7 @@
 
     /**
      * Do not call this directly. Use {@link #reboot(Context, String, boolean)}
-     * or {@link #shutdown(Context, boolean)} instead.
+     * or {@link #shutdown(Context, String, boolean)} instead.
      *
      * @param context Context used to vibrate or null without vibration
      * @param reboot true to reboot or false to shutdown
@@ -716,6 +758,8 @@
      */
     public static void rebootOrShutdown(final Context context, boolean reboot, String reason) {
         SHUTDOWN_TIMINGS_LOG.traceEnd(); // SystemServerShutdown
+        metricEnded(METRIC_SYSTEM_SERVER);
+        saveMetrics(reboot);
         if (reboot) {
             Log.i(TAG, "Rebooting, reason: " + reason);
             PowerManagerService.lowLevelReboot(reason);
@@ -742,6 +786,33 @@
         PowerManagerService.lowLevelShutdown(reason);
     }
 
+    private static void saveMetrics(boolean reboot) {
+        StringBuilder metricValue = new StringBuilder();
+        metricValue.append("reboot:");
+        metricValue.append(reboot ? "y" : "n");
+        final int metricsSize = TRON_METRICS.size();
+        for (int i = 0; i < metricsSize; i++) {
+            final String name = TRON_METRICS.keyAt(i);
+            final long value = TRON_METRICS.valueAt(i);
+            if (value < 0) {
+                Log.e(TAG, "metricEnded wasn't called for " + name);
+                continue;
+            }
+            metricValue.append(',').append(name).append(':').append(value);
+        }
+        File tmp = new File(METRICS_FILE_BASENAME + ".tmp");
+        boolean saved = false;
+        try (FileOutputStream fos = new FileOutputStream(tmp)) {
+            fos.write(metricValue.toString().getBytes(StandardCharsets.UTF_8));
+            saved = true;
+        } catch (IOException e) {
+            Log.e(TAG,"Cannot save shutdown metrics", e);
+        }
+        if (saved) {
+            tmp.renameTo(new File(METRICS_FILE_BASENAME + ".txt"));
+        }
+    }
+
     private void uncrypt() {
         Log.i(TAG, "Calling uncrypt and monitoring the progress...");