2 files changed, 71 insertions, 0 deletions

diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index 65ebbed57fef..1d629da2f250 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -161,6 +161,7 @@ message Atom {
         BluetoothBondStateChanged bluetooth_bond_state_changed = 165;
         BluetoothClassicPairingEventReported bluetooth_classic_pairing_event_reported = 166;
         BluetoothSmpPairingEventReported bluetooth_smp_pairing_event_reported = 167;
+        ProcessStartTime process_start_time = 169;
         BluetoothSocketConnectionStateChanged bluetooth_socket_connection_state_changed = 171;
     }
 
@@ -2968,3 +2969,59 @@ message SeOmapiReported {
 
     optional string package_name = 3;
 }
+
+/*
+* Logs number of milliseconds it takes to start a process.
+* The definition of app process start time is from the app launch time to
+* the time that Zygote finished forking the app process and loaded the
+* application package's java classes.
+
+* This metric is different from AppStartOccurred which is for foreground
+* activity only.
+
+* ProcessStartTime can report all processes (both foreground and background)
+* start time.
+*
+* Logged from:
+*   frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java
+*/
+message ProcessStartTime {
+    // The uid of the ProcessRecord.
+    optional int32 uid = 1 [(is_uid) = true];
+
+    // The process pid.
+    optional int32 pid = 2;
+
+    // The process name.
+    // Usually package name, "system" for system server.
+    // Provided by ActivityManagerService.
+    optional string process_name = 3;
+
+    enum StartType {
+        UNKNOWN = 0;
+        WARM = 1;
+        HOT = 2;
+        COLD = 3;
+    }
+
+    // The start type.
+    optional StartType type = 4;
+
+    // The elapsed realtime at the start of the process.
+    optional int64 process_start_time_millis = 5;
+
+    // Number of milliseconds it takes to reach bind application.
+    optional int32 bind_application_delay_millis = 6;
+
+    // Number of milliseconds it takes to finish start of the process.
+    optional int32 process_start_delay_millis = 7;
+
+    // hostingType field in ProcessRecord, the component type such as "activity",
+    // "service", "content provider", "broadcast" or other strings.
+    optional string hosting_type = 8;
+
+    // hostingNameStr field in ProcessRecord. The component class name that runs
+    // in this process.
+    optional string hosting_name = 9;
+}
+
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index ddab5ec0b184..06d1ca632363 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -7436,6 +7436,7 @@ public class ActivityManagerService extends IActivityManager.Stub
         // next app record if we are emulating process with anonymous threads.
         ProcessRecord app;
         long startTime = SystemClock.uptimeMillis();
+        long bindApplicationTimeMillis;
         if (pid != MY_PID && pid >= 0) {
             synchronized (mPidsSelfLocked) {
                 app = mPidsSelfLocked.get(pid);
@@ -7666,6 +7667,7 @@ public class ActivityManagerService extends IActivityManager.Stub
             }
 
             checkTime(startTime, "attachApplicationLocked: immediately before bindApplication");
+            bindApplicationTimeMillis = SystemClock.elapsedRealtime();
             mStackSupervisor.getActivityMetricsLogger().notifyBindApplication(app);
             if (app.isolatedEntryPoint != null) {
                 // This is an isolated process which should just call an entry point instead of
@@ -7784,6 +7786,18 @@ public class ActivityManagerService extends IActivityManager.Stub
             checkTime(startTime, "attachApplicationLocked: after updateOomAdjLocked");
         }
 
+        StatsLog.write(
+                StatsLog.PROCESS_START_TIME,
+                app.info.uid,
+                app.pid,
+                app.info.packageName,
+                StatsLog.PROCESS_START_TIME__TYPE__COLD,
+                app.startTime,
+                (int) (bindApplicationTimeMillis - app.startTime),
+                (int) (SystemClock.elapsedRealtime() - app.startTime),
+                app.hostingType,
+                (app.hostingNameStr != null ? app.hostingNameStr : ""));
+
         return true;
     }