From 175c0f9400d59b05a2da85a470f9b8dfbc5d1a31 Mon Sep 17 00:00:00 2001
From: Tim Murray <timmurray@google.com>
Date: Tue, 28 Nov 2017 15:01:04 -0800
Subject: AlarmManagerService: add tracing for wakeup alarms

Test: tracepoints work
bug 69862220

Change-Id: Iba77129162958556aec7efd36e485fab6e6857ec
---
 services/core/java/com/android/server/AlarmManagerService.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/services/core/java/com/android/server/AlarmManagerService.java b/services/core/java/com/android/server/AlarmManagerService.java
index 3904fc96caca..ab252a43814a 100644
--- a/services/core/java/com/android/server/AlarmManagerService.java
+++ b/services/core/java/com/android/server/AlarmManagerService.java
@@ -49,6 +49,7 @@ import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.SystemClock;
 import android.os.SystemProperties;
+import android.os.Trace;
 import android.os.UserHandle;
 import android.os.WorkSource;
 import android.provider.Settings;
@@ -3073,6 +3074,11 @@ class AlarmManagerService extends SystemService {
         for (int i=0; i<triggerList.size(); i++) {
             Alarm alarm = triggerList.get(i);
             final boolean allowWhileIdle = (alarm.flags&AlarmManager.FLAG_ALLOW_WHILE_IDLE) != 0;
+            if (alarm.wakeup) {
+              Trace.traceBegin(Trace.TRACE_TAG_POWER, "Dispatch wakeup alarm to " + alarm.packageName);
+            } else {
+              Trace.traceBegin(Trace.TRACE_TAG_POWER, "Dispatch non-wakeup alarm to " + alarm.packageName);
+            }
             try {
                 if (localLOGV) {
                     Slog.v(TAG, "sending alarm " + alarm);
@@ -3092,6 +3098,7 @@ class AlarmManagerService extends SystemService {
             } catch (RuntimeException e) {
                 Slog.w(TAG, "Failure sending alarm.", e);
             }
+            Trace.traceEnd(Trace.TRACE_TAG_POWER);
         }
     }
 
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