Merge branch 'readonly-p4-donut' into donut

3 files changed, 634 insertions, 167 deletions

diff --git a/core/java/android/os/BatteryStats.java b/core/java/android/os/BatteryStats.java
index 0e9102f..39d36de 100644
--- a/core/java/android/os/BatteryStats.java
+++ b/core/java/android/os/BatteryStats.java
@@ -89,7 +89,7 @@ public abstract class BatteryStats implements Parcelable {
     /**
      * Bump the version on this if the checkin format changes.
      */
-    private static final int BATTERY_STATS_CHECKIN_VERSION = 4;
+    private static final int BATTERY_STATS_CHECKIN_VERSION = 5;
     
     private static final long BYTES_PER_KB = 1024;
     private static final long BYTES_PER_MB = 1048576; // 1024^2
@@ -100,6 +100,7 @@ public abstract class BatteryStats implements Parcelable {
     private static final String PROCESS_DATA = "pr";
     private static final String SENSOR_DATA = "sr";
     private static final String WAKELOCK_DATA = "wl";
+    private static final String KERNEL_WAKELOCK_DATA = "kwl";
     private static final String NETWORK_DATA = "nt";
     private static final String USER_ACTIVITY_DATA = "ua";
     private static final String BATTERY_DATA = "bt";
@@ -126,7 +127,7 @@ public abstract class BatteryStats implements Parcelable {
          *
          * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT
          */
-        public abstract int getCount(int which);
+        public abstract int getCountLocked(int which);
 
         /**
          * Temporary for debugging.
@@ -145,7 +146,7 @@ public abstract class BatteryStats implements Parcelable {
          *
          * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT
          */
-        public abstract int getCount(int which);
+        public abstract int getCountLocked(int which);
 
         /**
          * Returns the total time in microseconds associated with this Timer for the
@@ -155,7 +156,7 @@ public abstract class BatteryStats implements Parcelable {
          * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT
          * @return a time in microseconds
          */
-        public abstract long getTotalTime(long batteryRealtime, int which);
+        public abstract long getTotalTimeLocked(long batteryRealtime, int which);
         
         /**
          * Temporary for debugging.
@@ -518,6 +519,8 @@ public abstract class BatteryStats implements Parcelable {
      * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
      */
     public abstract long computeRealtime(long curTime, int which);
+    
+    public abstract Map<String, ? extends Timer> getKernelWakelockStats();
 
     private final static void formatTime(StringBuilder out, long seconds) {
         long days = seconds / (60 * 60 * 24);
@@ -607,14 +610,14 @@ public abstract class BatteryStats implements Parcelable {
         
         if (timer != null) {
             // Convert from microseconds to milliseconds with rounding
-            long totalTimeMicros = timer.getTotalTime(batteryRealtime, which);
+            long totalTimeMicros = timer.getTotalTimeLocked(batteryRealtime, which);
             long totalTimeMillis = (totalTimeMicros + 500) / 1000;
             
-            int count = timer.getCount(which);
+            int count = timer.getCountLocked(which);
             if (totalTimeMillis != 0) {
                 sb.append(linePrefix);
                 sb.append(formatTimeMs(totalTimeMillis));
-                sb.append(name);
+                sb.append(name != null ? name : "");
                 sb.append(' ');
                 sb.append('(');
                 sb.append(count);
@@ -637,18 +640,17 @@ public abstract class BatteryStats implements Parcelable {
      * @return the line prefix
      */
     private static final String printWakeLockCheckin(StringBuilder sb, Timer timer, long now,
-        String name, int which, String linePrefix) {
+            String name, int which, String linePrefix) {
         long totalTimeMicros = 0;
         int count = 0;
         if (timer != null) {
-            totalTimeMicros = timer.getTotalTime(now, which);
-            count = timer.getCount(which); 
+            totalTimeMicros = timer.getTotalTimeLocked(now, which);
+            count = timer.getCountLocked(which); 
         }
         sb.append(linePrefix);
         sb.append((totalTimeMicros + 500) / 1000); // microseconds to milliseconds with rounding
         sb.append(',');
-        sb.append(name);
-        sb.append(',');
+        sb.append(name != null ? name + "," : "");
         sb.append(count);
         return ",";
     }
@@ -730,12 +732,12 @@ public abstract class BatteryStats implements Parcelable {
                     
                     Timer fullWakeTimer = wl.getWakeTime(WAKE_TYPE_FULL);
                     if (fullWakeTimer != null) {
-                        fullWakeLockTimeTotal += fullWakeTimer.getTotalTime(batteryRealtime, which);
+                        fullWakeLockTimeTotal += fullWakeTimer.getTotalTimeLocked(batteryRealtime, which);
                     }
 
                     Timer partialWakeTimer = wl.getWakeTime(WAKE_TYPE_PARTIAL);
                     if (partialWakeTimer != null) {
-                        partialWakeLockTimeTotal += partialWakeTimer.getTotalTime(
+                        partialWakeLockTimeTotal += partialWakeTimer.getTotalTimeLocked(
                             batteryRealtime, which);
                     }
                 }
@@ -783,6 +785,17 @@ public abstract class BatteryStats implements Parcelable {
                     getDischargeCurrentLevel());
         }
         
+        Map<String, ? extends BatteryStats.Timer> kernelWakelocks = getKernelWakelockStats();
+        if (kernelWakelocks.size() > 0) {
+            for (Map.Entry<String, ? extends BatteryStats.Timer> ent : kernelWakelocks.entrySet()) {
+                sb.setLength(0);
+                printWakeLockCheckin(sb, ent.getValue(), batteryRealtime, null, which, "");
+
+                dumpLine(pw, 0 /* uid */, category, KERNEL_WAKELOCK_DATA, ent.getKey(), 
+                        sb.toString());
+            }
+        }
+        
         for (int iu = 0; iu < NU; iu++) {
             final int uid = uidStats.keyAt(iu);
             Uid u = uidStats.valueAt(iu);
@@ -821,12 +834,12 @@ public abstract class BatteryStats implements Parcelable {
                     Uid.Wakelock wl = ent.getValue();
                     String linePrefix = "";
                     sb.setLength(0);
-                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_FULL), batteryRealtime,
-                            "f", which, linePrefix);
-                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_PARTIAL), batteryRealtime,
-                            "p", which, linePrefix);
-                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_WINDOW), batteryRealtime,
-                            "w", which, linePrefix);
+                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_FULL), 
+                            batteryRealtime, "f", which, linePrefix);
+                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_PARTIAL), 
+                            batteryRealtime, "p", which, linePrefix);
+                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_WINDOW), 
+                            batteryRealtime, "w", which, linePrefix);
                     
                     // Only log if we had at lease one wakelock...
                     if (sb.length() > 0) {
@@ -844,8 +857,8 @@ public abstract class BatteryStats implements Parcelable {
                     Timer timer = se.getSensorTime();
                     if (timer != null) {
                         // Convert from microseconds to milliseconds with rounding
-                        long totalTime = (timer.getTotalTime(batteryRealtime, which) + 500) / 1000;
-                        int count = timer.getCount(which);
+                        long totalTime = (timer.getTotalTimeLocked(batteryRealtime, which) + 500) / 1000;
+                        int count = timer.getCountLocked(which);
                         if (totalTime != 0) {
                             dumpLine(pw, uid, category, SENSOR_DATA, sensorNumber, totalTime, count);
                         }
@@ -971,6 +984,26 @@ public abstract class BatteryStats implements Parcelable {
         long fullWakeLockTimeTotalMicros = 0;
         long partialWakeLockTimeTotalMicros = 0;
         
+        Map<String, ? extends BatteryStats.Timer> kernelWakelocks = getKernelWakelockStats();
+        if (kernelWakelocks.size() > 0) {
+            for (Map.Entry<String, ? extends BatteryStats.Timer> ent : kernelWakelocks.entrySet()) {
+                
+                String linePrefix = ": ";
+                sb.setLength(0);
+                sb.append(prefix);
+                sb.append("  Kernel Wake lock ");
+                sb.append(ent.getKey());
+                linePrefix = printWakeLock(sb, ent.getValue(), batteryRealtime, null, which, 
+                        linePrefix);
+                if (!linePrefix.equals(": ")) {
+                    sb.append(" realtime");
+                } else {
+                    sb.append(": (nothing executed)");
+                }
+                pw.println(sb.toString());
+            }
+        }
+    
         for (int iu = 0; iu < NU; iu++) {
             Uid u = uidStats.valueAt(iu);
             rxTotal += u.getTcpBytesReceived(which);
@@ -984,13 +1017,13 @@ public abstract class BatteryStats implements Parcelable {
                     
                     Timer fullWakeTimer = wl.getWakeTime(WAKE_TYPE_FULL);
                     if (fullWakeTimer != null) {
-                        fullWakeLockTimeTotalMicros += fullWakeTimer.getTotalTime(
+                        fullWakeLockTimeTotalMicros += fullWakeTimer.getTotalTimeLocked(
                                 batteryRealtime, which);
                     }
 
                     Timer partialWakeTimer = wl.getWakeTime(WAKE_TYPE_PARTIAL);
                     if (partialWakeTimer != null) {
-                        partialWakeLockTimeTotalMicros += partialWakeTimer.getTotalTime(
+                        partialWakeLockTimeTotalMicros += partialWakeTimer.getTotalTimeLocked(
                                 batteryRealtime, which);
                     }
                 }
@@ -1179,8 +1212,9 @@ public abstract class BatteryStats implements Parcelable {
                     Timer timer = se.getSensorTime();
                     if (timer != null) {
                         // Convert from microseconds to milliseconds with rounding
-                        long totalTime = (timer.getTotalTime(batteryRealtime, which) + 500) / 1000;
-                        int count = timer.getCount(which);
+                        long totalTime = (timer.getTotalTimeLocked(
+                                batteryRealtime, which) + 500) / 1000;
+                        int count = timer.getCountLocked(which);
                         //timer.logState();
                         if (totalTime != 0) {
                             sb.append(formatTimeMs(totalTime));
diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index cd86fbe..e4412a3 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -680,6 +680,8 @@ public class Process {
     /** @hide */
     public static final int PROC_SPACE_TERM = (int)' ';
     /** @hide */
+    public static final int PROC_TAB_TERM = (int)'\t';
+    /** @hide */
     public static final int PROC_COMBINE = 0x100;
     /** @hide */
     public static final int PROC_PARENS = 0x200;
@@ -693,6 +695,10 @@ public class Process {
     /** @hide */
     public static final native boolean readProcFile(String file, int[] format,
             String[] outStrings, long[] outLongs, float[] outFloats);
+    
+    /** @hide */
+    public static final native boolean parseProcLine(byte[] buffer, int startIndex, 
+            int endIndex, int[] format, String[] outStrings, long[] outLongs, float[] outFloats);
 
     /**
      * Gets the total Pss value for a given process, in bytes.
diff --git a/core/java/com/android/internal/os/BatteryStatsImpl.java b/core/java/com/android/internal/os/BatteryStatsImpl.java
index f492ad1..58a9be85 100644
--- a/core/java/com/android/internal/os/BatteryStatsImpl.java
+++ b/core/java/com/android/internal/os/BatteryStatsImpl.java
@@ -21,6 +21,7 @@ import android.os.NetStat;
 import android.os.Parcel;
 import android.os.ParcelFormatException;
 import android.os.Parcelable;
+import android.os.Process;
 import android.os.SystemClock;
 import android.telephony.TelephonyManager;
 import android.util.Log;
@@ -33,7 +34,10 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * All information we are collecting about things that can happen that impact
@@ -48,7 +52,7 @@ public final class BatteryStatsImpl extends BatteryStats {
     private static final int MAGIC = 0xBA757475; // 'BATSTATS' 
 
     // Current on-disk Parcel version
-    private static final int VERSION = 32;
+    private static final int VERSION = 34;
 
     private final File mFile;
     private final File mBackupFile;
@@ -63,11 +67,11 @@ public final class BatteryStatsImpl extends BatteryStats {
     // elapsed time by the number of active timers to arrive at that timer's share of the time.
     // In order to do this, we must refresh each timer whenever the number of active timers
     // changes.
-    final ArrayList<Timer> mPartialTimers = new ArrayList<Timer>();
-    final ArrayList<Timer> mFullTimers = new ArrayList<Timer>();
-    final ArrayList<Timer> mWindowTimers = new ArrayList<Timer>();
-    final SparseArray<ArrayList<Timer>> mSensorTimers
-            = new SparseArray<ArrayList<Timer>>();
+    final ArrayList<StopwatchTimer> mPartialTimers = new ArrayList<StopwatchTimer>();
+    final ArrayList<StopwatchTimer> mFullTimers = new ArrayList<StopwatchTimer>();
+    final ArrayList<StopwatchTimer> mWindowTimers = new ArrayList<StopwatchTimer>();
+    final SparseArray<ArrayList<StopwatchTimer>> mSensorTimers
+            = new SparseArray<ArrayList<StopwatchTimer>>();
 
     // These are the objects that will want to do something when the device
     // is unplugged from power.
@@ -88,31 +92,33 @@ public final class BatteryStatsImpl extends BatteryStats {
     long mLastRealtime;
     
     boolean mScreenOn;
-    Timer mScreenOnTimer;
+    StopwatchTimer mScreenOnTimer;
     
     int mScreenBrightnessBin = -1;
-    final Timer[] mScreenBrightnessTimer = new Timer[NUM_SCREEN_BRIGHTNESS_BINS];
+    final StopwatchTimer[] mScreenBrightnessTimer = new StopwatchTimer[NUM_SCREEN_BRIGHTNESS_BINS];
     
     Counter mInputEventCounter;
     
     boolean mPhoneOn;
-    Timer mPhoneOnTimer;
+    StopwatchTimer mPhoneOnTimer;
     
     int mPhoneSignalStrengthBin = -1;
-    final Timer[] mPhoneSignalStrengthsTimer = new Timer[NUM_SIGNAL_STRENGTH_BINS];
+    final StopwatchTimer[] mPhoneSignalStrengthsTimer = 
+            new StopwatchTimer[NUM_SIGNAL_STRENGTH_BINS];
     
     int mPhoneDataConnectionType = -1;
-    final Timer[] mPhoneDataConnectionsTimer = new Timer[NUM_DATA_CONNECTION_TYPES];
+    final StopwatchTimer[] mPhoneDataConnectionsTimer = 
+            new StopwatchTimer[NUM_DATA_CONNECTION_TYPES];
     
     boolean mWifiOn;
-    Timer mWifiOnTimer;
+    StopwatchTimer mWifiOnTimer;
     int mWifiOnUid = -1;
 
     boolean mWifiRunning;
-    Timer mWifiRunningTimer;
+    StopwatchTimer mWifiRunningTimer;
     
     boolean mBluetoothOn;
-    Timer mBluetoothOnTimer;
+    StopwatchTimer mBluetoothOnTimer;
     
     /**
      * These provide time bases that discount the time the device is plugged
@@ -135,6 +141,37 @@ public final class BatteryStatsImpl extends BatteryStats {
     int mDischargeCurrentLevel;
     
     long mLastWriteTime = 0; // Milliseconds
+    
+    /*
+     * Holds a SamplingTimer associated with each kernel wakelock name being tracked.
+     */
+    private final HashMap<String, SamplingTimer> mKernelWakelockStats = 
+            new HashMap<String, SamplingTimer>();
+    
+    public Map<String, ? extends SamplingTimer> getKernelWakelockStats() {
+        return mKernelWakelockStats;
+    }
+    
+    private static int sKernelWakelockUpdateVersion = 0;
+    
+    private static final int[] PROC_WAKELOCKS_FORMAT = new int[] {
+        Process.PROC_TAB_TERM|Process.PROC_OUT_STRING,                // 0: name
+        Process.PROC_TAB_TERM|Process.PROC_OUT_LONG,                  // 1: count
+        Process.PROC_TAB_TERM,
+        Process.PROC_TAB_TERM,
+        Process.PROC_TAB_TERM,
+        Process.PROC_TAB_TERM|Process.PROC_OUT_LONG,                  // 5: totalTime
+    };
+    
+    private final String[] mProcWakelocksName = new String[3];
+    private final long[] mProcWakelocksData = new long[3];
+    
+    /*
+     * Used as a buffer for reading in data from /proc/wakelocks before it is processed and added
+     * to mKernelWakelockStats.
+     */
+    private final Map<String, KernelWakelockStats> mProcWakelockFileStats = 
+            new HashMap<String, KernelWakelockStats>();
 
     // For debugging
     public BatteryStatsImpl() {
@@ -200,7 +237,7 @@ public final class BatteryStatsImpl extends BatteryStats {
         }
 
         @Override
-        public int getCount(int which) {
+        public int getCountLocked(int which) {
             int val;
             if (which == STATS_LAST) {
                 val = mLastCount;
@@ -242,11 +279,9 @@ public final class BatteryStatsImpl extends BatteryStats {
     /**
      * State for keeping track of timing information.
      */
-    public static final class Timer extends BatteryStats.Timer implements Unpluggable {
+    public static abstract class Timer extends BatteryStats.Timer implements Unpluggable {
         final int mType;
-        final ArrayList<Timer> mTimerPool;
-        
-        int mNesting;
+
         
         int mCount;
         int mLoadedCount;
@@ -281,24 +316,10 @@ public final class BatteryStatsImpl extends BatteryStats {
          * power.
          */
         long mUnpluggedTime;
-
-        /**
-         * The last time at which we updated the timer.  If mNesting is > 0,
-         * subtract this from the current battery time to find the amount of
-         * time we have been running since we last computed an update.
-         */
-        long mUpdateTime;
-        
-        /**
-         * The total time at which the timer was acquired, to determine if
-         * was actually held for an interesting duration.
-         */
-        long mAcquireTime;
         
-        Timer(int type, ArrayList<Timer> timerPool,
-                ArrayList<Unpluggable> unpluggables, Parcel in) {
+        Timer(int type, ArrayList<Unpluggable> unpluggables, Parcel in) {
             mType = type;
-            mTimerPool = timerPool;
+            
             mCount = in.readInt();
             mLoadedCount = in.readInt();
             mLastCount = in.readInt();
@@ -306,17 +327,19 @@ public final class BatteryStatsImpl extends BatteryStats {
             mTotalTime = in.readLong();
             mLoadedTime = in.readLong();
             mLastTime = in.readLong();
-            mUpdateTime = in.readLong();
             mUnpluggedTime = in.readLong();
             unpluggables.add(this);
         }
 
-        Timer(int type, ArrayList<Timer> timerPool,
-                ArrayList<Unpluggable> unpluggables) {
+        Timer(int type, ArrayList<Unpluggable> unpluggables) {
             mType = type;
-            mTimerPool = timerPool;
             unpluggables.add(this);
         }
+
+        protected abstract long computeRunTimeLocked(long curBatteryRealtime);
+        
+        protected abstract int computeCurrentCountLocked();
+        
         
         public void writeToParcel(Parcel out, long batteryRealtime) {
             out.writeInt(mCount);
@@ -326,7 +349,6 @@ public final class BatteryStatsImpl extends BatteryStats {
             out.writeLong(computeRunTimeLocked(batteryRealtime));
             out.writeLong(mLoadedTime);
             out.writeLong(mLastTime);
-            out.writeLong(mUpdateTime);
             out.writeLong(mUnpluggedTime);
         }
 
@@ -346,19 +368,15 @@ public final class BatteryStatsImpl extends BatteryStats {
         }
 
         public void plug(long batteryUptime, long batteryRealtime) {
-            if (mNesting > 0) {
-                if (DEBUG && mType < 0) {
-                    Log.v(TAG, "plug #" + mType + ": realtime=" + batteryRealtime
-                            + " old mTotalTime=" + mTotalTime
-                            + " old mUpdateTime=" + mUpdateTime);
-                }
-                mTotalTime = computeRunTimeLocked(batteryRealtime);
-                mUpdateTime = batteryRealtime;
-                if (DEBUG && mType < 0) {
-                    Log.v(TAG, "plug #" + mType
-                            + ": new mTotalTime=" + mTotalTime
-                            + " old mUpdateTime=" + mUpdateTime);
-                }
+            if (DEBUG && mType < 0) {
+                Log.v(TAG, "plug #" + mType + ": realtime=" + batteryRealtime
+                        + " old mTotalTime=" + mTotalTime);
+            }
+            mTotalTime = computeRunTimeLocked(batteryRealtime);
+            mCount = computeCurrentCountLocked();
+            if (DEBUG && mType < 0) {
+                Log.v(TAG, "plug #" + mType
+                        + ": new mTotalTime=" + mTotalTime);
             }
         }
         
@@ -380,7 +398,7 @@ public final class BatteryStatsImpl extends BatteryStats {
         }
 
         @Override
-        public long getTotalTime(long batteryRealtime, int which) {
+        public long getTotalTimeLocked(long batteryRealtime, int which) {
             long val;
             if (which == STATS_LAST) {
                 val = mLastTime;
@@ -397,12 +415,12 @@ public final class BatteryStatsImpl extends BatteryStats {
         }
 
         @Override
-        public int getCount(int which) {
+        public int getCountLocked(int which) {
             int val;
             if (which == STATS_LAST) {
                 val = mLastCount;
             } else {
-                val = mCount;
+                val = computeCurrentCountLocked();
                 if (which == STATS_UNPLUGGED) {
                     val -= mUnpluggedCount;
                 } else if (which != STATS_TOTAL) {
@@ -414,14 +432,239 @@ public final class BatteryStatsImpl extends BatteryStats {
         }
 
         public void logState(Printer pw, String prefix) {
-            pw.println(prefix + "mNesting=" + mNesting + " mCount=" + mCount
+            pw.println(prefix + " mCount=" + mCount
                     + " mLoadedCount=" + mLoadedCount + " mLastCount=" + mLastCount
                     + " mUnpluggedCount=" + mUnpluggedCount);
             pw.println(prefix + "mTotalTime=" + mTotalTime
                     + " mLoadedTime=" + mLoadedTime);
             pw.println(prefix + "mLastTime=" + mLastTime
                     + " mUnpluggedTime=" + mUnpluggedTime);
-            pw.println(prefix + "mUpdateTime=" + mUpdateTime
+        }
+        
+        
+        void writeSummaryFromParcelLocked(Parcel out, long batteryRealtime) {
+            long runTime = computeRunTimeLocked(batteryRealtime);
+            // Divide by 1000 for backwards compatibility
+            out.writeLong((runTime + 500) / 1000);
+            out.writeLong(((runTime - mLoadedTime) + 500) / 1000);
+            out.writeInt(mCount);
+            out.writeInt(mCount - mLoadedCount);
+        }
+
+        void readSummaryFromParcelLocked(Parcel in) {
+            // Multiply by 1000 for backwards compatibility
+            mTotalTime = mLoadedTime = in.readLong() * 1000;
+            mLastTime = in.readLong() * 1000;
+            mUnpluggedTime = mTotalTime;
+            mCount = mLoadedCount = in.readInt();
+            mLastCount = in.readInt();
+            mUnpluggedCount = mCount;
+        }
+    }
+    
+    public static final class SamplingTimer extends Timer {
+        
+        /**
+         * The most recent reported count from /proc/wakelocks.
+         */
+        int mCurrentReportedCount;
+
+        /**
+         * The reported count from /proc/wakelocks when unplug() was last
+         * called.
+         */
+        int mUnpluggedReportedCount;
+
+        /**
+         * The most recent reported total_time from /proc/wakelocks.
+         */ 
+        long mCurrentReportedTotalTime;
+
+
+        /**
+         * The reported total_time from /proc/wakelocks when unplug() was last
+         * called.
+         */
+        long mUnpluggedReportedTotalTime;
+
+        /**
+         * Whether we are currently in a discharge cycle.
+         */
+        boolean mInDischarge;
+
+        /**
+         * Whether we are currently recording reported values.
+         */
+        boolean mTrackingReportedValues;
+        
+        /*
+         * A sequnce counter, incremented once for each update of the stats.
+         */
+        int mUpdateVersion;
+        
+        SamplingTimer(ArrayList<Unpluggable> unpluggables, boolean inDischarge, Parcel in) {
+            super(0, unpluggables, in);
+            mCurrentReportedCount = in.readInt();
+            mUnpluggedReportedCount = in.readInt();
+            mCurrentReportedTotalTime = in.readLong();
+            mUnpluggedReportedTotalTime = in.readLong();
+            mTrackingReportedValues = in.readInt() == 1;
+            mInDischarge = inDischarge;
+        }
+        
+        SamplingTimer(ArrayList<Unpluggable> unpluggables, boolean inDischarge, 
+                boolean trackReportedValues) {
+            super(0, unpluggables);
+            mTrackingReportedValues = trackReportedValues;
+            mInDischarge = inDischarge;
+        }
+        
+        public void setStale() {
+            mTrackingReportedValues = false;
+            mUnpluggedReportedTotalTime = 0;
+            mUnpluggedReportedCount = 0;
+        }
+        
+        public void setUpdateVersion(int version) {
+            mUpdateVersion = version;
+        }
+        
+        public int getUpdateVersion() {
+            return mUpdateVersion;
+        }
+        
+        public void updateCurrentReportedCount(int count) {
+            if (mInDischarge && mUnpluggedReportedCount == 0) {
+                // Updating the reported value for the first time.
+                mUnpluggedReportedCount = count;
+                // If we are receiving an update update mTrackingReportedValues;
+                mTrackingReportedValues = true;
+            }
+            mCurrentReportedCount = count;
+        }
+        
+        public void updateCurrentReportedTotalTime(long totalTime) {
+            if (mInDischarge && mUnpluggedReportedTotalTime == 0) {
+                // Updating the reported value for the first time.
+                mUnpluggedReportedTotalTime = totalTime;
+                // If we are receiving an update update mTrackingReportedValues;
+                mTrackingReportedValues = true;
+            }
+            mCurrentReportedTotalTime = totalTime;
+        }
+        
+        public void unplug(long batteryUptime, long batteryRealtime) {
+            super.unplug(batteryUptime, batteryRealtime);
+            if (mTrackingReportedValues) {
+                mUnpluggedReportedTotalTime = mCurrentReportedTotalTime;
+                mUnpluggedReportedCount = mCurrentReportedCount;
+            }
+            mInDischarge = true;
+        }
+
+        public void plug(long batteryUptime, long batteryRealtime) {
+            super.plug(batteryUptime, batteryRealtime);
+            mInDischarge = false;
+        }
+        
+        public void logState(Printer pw, String prefix) {
+            super.logState(pw, prefix);
+            pw.println(prefix + "mCurrentReportedCount=" + mCurrentReportedCount 
+                    + " mUnpluggedReportedCount=" + mUnpluggedReportedCount
+                    + " mCurrentReportedTotalTime=" + mCurrentReportedTotalTime
+                    + " mUnpluggedReportedTotalTime=" + mUnpluggedReportedTotalTime);
+        }
+        
+        protected long computeRunTimeLocked(long curBatteryRealtime) {
+            return mTotalTime + (mInDischarge && mTrackingReportedValues 
+                    ? mCurrentReportedTotalTime - mUnpluggedReportedTotalTime : 0);
+        }
+        
+        protected int computeCurrentCountLocked() {
+            return mCount + (mInDischarge && mTrackingReportedValues
+                    ? mCurrentReportedCount - mUnpluggedReportedCount : 0);
+        }
+        
+        public void writeToParcel(Parcel out, long batteryRealtime) {
+            super.writeToParcel(out, batteryRealtime);
+            out.writeInt(mCurrentReportedCount);
+            out.writeInt(mUnpluggedReportedCount);
+            out.writeLong(mCurrentReportedTotalTime);
+            out.writeLong(mUnpluggedReportedTotalTime);
+            out.writeInt(mTrackingReportedValues ? 1 : 0);
+        }
+        
+        void writeSummaryFromParcelLocked(Parcel out, long batteryRealtime) {
+            super.writeSummaryFromParcelLocked(out, batteryRealtime);
+            out.writeLong(mCurrentReportedTotalTime);
+            out.writeInt(mCurrentReportedCount);
+            out.writeInt(mTrackingReportedValues ? 1 : 0);
+        }
+
+        void readSummaryFromParcelLocked(Parcel in) {
+            super.readSummaryFromParcelLocked(in);
+            mUnpluggedReportedTotalTime = mCurrentReportedTotalTime = in.readLong();
+            mUnpluggedReportedCount = mCurrentReportedCount = in.readInt();
+            mTrackingReportedValues = in.readInt() == 1;
+        }
+    }
+    
+    /**
+     * State for keeping track of timing information.
+     */
+    public static final class StopwatchTimer extends Timer {
+        final ArrayList<StopwatchTimer> mTimerPool;
+        int mNesting;
+
+
+        /**
+         * The last time at which we updated the timer.  If mNesting is > 0,
+         * subtract this from the current battery time to find the amount of
+         * time we have been running since we last computed an update.
+         */
+        long mUpdateTime;
+        
+        /**
+         * The total time at which the timer was acquired, to determine if
+         * was actually held for an interesting duration.
+         */
+        long mAcquireTime;
+        
+
+        StopwatchTimer(int type, ArrayList<StopwatchTimer> timerPool,
+                ArrayList<Unpluggable> unpluggables, Parcel in) {
+            super(type, unpluggables, in);
+            mTimerPool = timerPool;
+            mUpdateTime = in.readLong();
+        }
+
+        StopwatchTimer(int type, ArrayList<StopwatchTimer> timerPool,
+                ArrayList<Unpluggable> unpluggables) {
+            super(type, unpluggables);
+            mTimerPool = timerPool;
+        }
+        
+        public void writeToParcel(Parcel out, long batteryRealtime) {
+            super.writeToParcel(out, batteryRealtime);
+            out.writeLong(mUpdateTime);
+        }
+
+        public void plug(long batteryUptime, long batteryRealtime) {
+            if (mNesting > 0) {
+                if (DEBUG && mType < 0) {
+                    Log.v(TAG, "old mUpdateTime=" + mUpdateTime);
+                }
+                super.plug(batteryUptime, batteryRealtime);
+                mUpdateTime = batteryRealtime;
+                if (DEBUG && mType < 0) {
+                    Log.v(TAG, "new mUpdateTime=" + mUpdateTime);
+                }
+            }
+        }
+
+        public void logState(Printer pw, String prefix) {
+            super.logState(pw, prefix);
+            pw.println(prefix + "mNesting=" + mNesting + "mUpdateTime=" + mUpdateTime
                     + " mAcquireTime=" + mAcquireTime);
         }
         
@@ -484,12 +727,12 @@ public final class BatteryStatsImpl extends BatteryStats {
         // Update the total time for all other running Timers with the same type as this Timer
         // due to a change in timer count
         private static void refreshTimersLocked(final BatteryStatsImpl stats,
-                final ArrayList<Timer> pool) {
+                final ArrayList<StopwatchTimer> pool) {
             final long realtime = SystemClock.elapsedRealtime() * 1000; 
             final long batteryRealtime = stats.getBatteryRealtimeLocked(realtime);
             final int N = pool.size();
             for (int i=N-1; i>= 0; i--) {
-                final Timer t = pool.get(i);
+                final StopwatchTimer t = pool.get(i);
                 long heldTime = batteryRealtime - t.mUpdateTime;
                 if (heldTime > 0) {
                     t.mTotalTime += heldTime / N;
@@ -498,34 +741,146 @@ public final class BatteryStatsImpl extends BatteryStats {
             }
         }
 
-        private long computeRunTimeLocked(long curBatteryRealtime) {
+        @Override
+        protected long computeRunTimeLocked(long curBatteryRealtime) {
             return mTotalTime + (mNesting > 0
                     ? (curBatteryRealtime - mUpdateTime)
                             / (mTimerPool != null ? mTimerPool.size() : 1)
                     : 0);
         }
 
-        void writeSummaryFromParcelLocked(Parcel out, long batteryRealtime) {
-            long runTime = computeRunTimeLocked(batteryRealtime);
-            // Divide by 1000 for backwards compatibility
-            out.writeLong((runTime + 500) / 1000);
-            out.writeLong(((runTime - mLoadedTime) + 500) / 1000);
-            out.writeInt(mCount);
-            out.writeInt(mCount - mLoadedCount);
+        @Override
+        protected int computeCurrentCountLocked() {
+            return mCount;
         }
 
         void readSummaryFromParcelLocked(Parcel in) {
-            // Multiply by 1000 for backwards compatibility
-            mTotalTime = mLoadedTime = in.readLong() * 1000;
-            mLastTime = in.readLong() * 1000;
-            mUnpluggedTime = mTotalTime;
-            mCount = mLoadedCount = in.readInt();
-            mLastCount = in.readInt();
-            mUnpluggedCount = mCount;
+            super.readSummaryFromParcelLocked(in);
             mNesting = 0;
         }
     }
     
+    private final Map<String, KernelWakelockStats> readKernelWakelockStats() {
+        
+        byte[] buffer = new byte[4096];
+        int len;
+        
+        try {
+            FileInputStream is = new FileInputStream("/proc/wakelocks");
+            len = is.read(buffer);
+            is.close();
+
+            if (len > 0) {
+                int i;
+                for (i=0; i<len; i++) {
+                    if (buffer[i] == '\0') {
+                        len = i;
+                        break;
+                    }
+                }
+            }
+        } catch (java.io.FileNotFoundException e) {
+            return null;
+        } catch (java.io.IOException e) {
+            return null;
+        }
+        
+        return parseProcWakelocks(buffer, len);
+    }
+    
+    private final Map<String, KernelWakelockStats> parseProcWakelocks(
+            byte[] wlBuffer, int len) {
+        String name;
+        int count;
+        long totalTime;
+        int startIndex, endIndex;
+        int numUpdatedWlNames = 0;
+
+        // Advance past the first line.
+        int i;
+        for (i = 0; i < len && wlBuffer[i] != '\n' && wlBuffer[i] != '\0'; i++);
+        startIndex = endIndex = i + 1;
+
+        synchronized(this) {
+            Map<String, KernelWakelockStats> m = mProcWakelockFileStats;
+            
+            sKernelWakelockUpdateVersion++;
+            while (endIndex < len) {
+                for (endIndex=startIndex; 
+                        endIndex < len && wlBuffer[endIndex] != '\n' && wlBuffer[endIndex] != '\0'; 
+                        endIndex++);
+                endIndex++; // endIndex is an exclusive upper bound.
+
+                String[] nameStringArray = mProcWakelocksName;
+                long[] wlData = mProcWakelocksData;
+                Process.parseProcLine(wlBuffer, startIndex, endIndex, PROC_WAKELOCKS_FORMAT, 
+                        nameStringArray, wlData, null);
+                
+                name = nameStringArray[0];
+                count = (int) wlData[1];
+                // convert nanoseconds to microseconds with rounding.
+                totalTime = (wlData[2] + 500) / 1000;
+
+                if (name.length() > 0) {
+                    if (!m.containsKey(name)) {
+                        m.put(name, new KernelWakelockStats(count, totalTime, 
+                                sKernelWakelockUpdateVersion));
+                        numUpdatedWlNames++;
+                    } else {
+                        KernelWakelockStats kwlStats = m.get(name);
+                        if (kwlStats.mVersion == sKernelWakelockUpdateVersion) {
+                            kwlStats.mCount += count;
+                            kwlStats.mTotalTime += totalTime;
+                        } else {
+                            kwlStats.mCount = count;
+                            kwlStats.mTotalTime = totalTime;
+                            kwlStats.mVersion = sKernelWakelockUpdateVersion;
+                            numUpdatedWlNames++;
+                        }
+                    }
+                }              
+                startIndex = endIndex;
+            }
+
+            if (m.size() != numUpdatedWlNames) {
+                // Don't report old data.
+                Iterator<KernelWakelockStats> itr = m.values().iterator();
+                while (itr.hasNext()) {
+                    if (itr.next().mVersion != sKernelWakelockUpdateVersion) {
+                        itr.remove();
+                    }
+                }
+            }
+            return m;
+        }
+    }
+    
+    private class KernelWakelockStats {
+        public int mCount;
+        public long mTotalTime;
+        public int mVersion;
+        
+        KernelWakelockStats(int count, long totalTime, int version) {
+            mCount = count;
+            mTotalTime = totalTime;
+            mVersion = version;
+        }
+    }
+    
+    /*
+     * Get the KernelWakelockTimer associated with name, and create a new one if one 
+     * doesn't already exist.
+     */
+    public SamplingTimer getKernelWakelockTimerLocked(String name) {
+        SamplingTimer kwlt = mKernelWakelockStats.get(name);
+        if (kwlt == null) {
+            kwlt = new SamplingTimer(mUnpluggables, mOnBatteryInternal, 
+                    true /* track reported values */);
+            mKernelWakelockStats.put(name, kwlt);
+        }
+        return kwlt;
+    }
+    
     public void doUnplug(long batteryUptime, long batteryRealtime) {
         for (int iu = mUidStats.size() - 1; iu >= 0; iu--) {
             Uid u = mUidStats.valueAt(iu);
@@ -760,53 +1115,53 @@ public final class BatteryStatsImpl extends BatteryStats {
     }
     
     @Override public long getScreenOnTime(long batteryRealtime, int which) {
-        return mScreenOnTimer.getTotalTime(batteryRealtime, which);
+        return mScreenOnTimer.getTotalTimeLocked(batteryRealtime, which);
     }
     
     @Override public long getScreenBrightnessTime(int brightnessBin,
             long batteryRealtime, int which) {
-        return mScreenBrightnessTimer[brightnessBin].getTotalTime(
+        return mScreenBrightnessTimer[brightnessBin].getTotalTimeLocked(
                 batteryRealtime, which);
     }
     
     @Override public int getInputEventCount(int which) {
-        return mInputEventCounter.getCount(which);
+        return mInputEventCounter.getCountLocked(which);
     }
     
     @Override public long getPhoneOnTime(long batteryRealtime, int which) {
-        return mPhoneOnTimer.getTotalTime(batteryRealtime, which);
+        return mPhoneOnTimer.getTotalTimeLocked(batteryRealtime, which);
     }
     
     @Override public long getPhoneSignalStrengthTime(int strengthBin,
             long batteryRealtime, int which) {
-        return mPhoneSignalStrengthsTimer[strengthBin].getTotalTime(
+        return mPhoneSignalStrengthsTimer[strengthBin].getTotalTimeLocked(
                 batteryRealtime, which);
     }
     
     @Override public int getPhoneSignalStrengthCount(int dataType, int which) {
-        return mPhoneDataConnectionsTimer[dataType].getCount(which);
+        return mPhoneDataConnectionsTimer[dataType].getCountLocked(which);
     }
     
     @Override public long getPhoneDataConnectionTime(int dataType,
             long batteryRealtime, int which) {
-        return mPhoneDataConnectionsTimer[dataType].getTotalTime(
+        return mPhoneDataConnectionsTimer[dataType].getTotalTimeLocked(
                 batteryRealtime, which);
     }
     
     @Override public int getPhoneDataConnectionCount(int dataType, int which) {
-        return mPhoneDataConnectionsTimer[dataType].getCount(which);
+        return mPhoneDataConnectionsTimer[dataType].getCountLocked(which);
     }
     
     @Override public long getWifiOnTime(long batteryRealtime, int which) {
-        return mWifiOnTimer.getTotalTime(batteryRealtime, which);
+        return mWifiOnTimer.getTotalTimeLocked(batteryRealtime, which);
     }
     
     @Override public long getWifiRunningTime(long batteryRealtime, int which) {
-        return mWifiRunningTimer.getTotalTime(batteryRealtime, which);
+        return mWifiRunningTimer.getTotalTimeLocked(batteryRealtime, which);
     }
 
     @Override public long getBluetoothOnTime(long batteryRealtime, int which) {
-        return mBluetoothOnTimer.getTotalTime(batteryRealtime, which);
+        return mBluetoothOnTimer.getTotalTimeLocked(batteryRealtime, which);
     }
     
     @Override public boolean getIsOnBattery() {
@@ -836,13 +1191,13 @@ public final class BatteryStatsImpl extends BatteryStats {
         long mStartedTcpBytesSent = -1;
         
         boolean mWifiTurnedOn;
-        Timer mWifiTurnedOnTimer;
+        StopwatchTimer mWifiTurnedOnTimer;
         
         boolean mFullWifiLockOut;
-        Timer mFullWifiLockTimer;
+        StopwatchTimer mFullWifiLockTimer;
         
         boolean mScanWifiLockOut;
-        Timer mScanWifiLockTimer;
+        StopwatchTimer mScanWifiLockTimer;
         
         Counter[] mUserActivityCounters;
         
@@ -868,9 +1223,9 @@ public final class BatteryStatsImpl extends BatteryStats {
         
         public Uid(int uid) {
             mUid = uid;
-            mWifiTurnedOnTimer = new Timer(WIFI_TURNED_ON, null, mUnpluggables);
-            mFullWifiLockTimer = new Timer(FULL_WIFI_LOCK, null, mUnpluggables);
-            mScanWifiLockTimer = new Timer(SCAN_WIFI_LOCK, null, mUnpluggables);
+            mWifiTurnedOnTimer = new StopwatchTimer(WIFI_TURNED_ON, null, mUnpluggables);
+            mFullWifiLockTimer = new StopwatchTimer(FULL_WIFI_LOCK, null, mUnpluggables);
+            mScanWifiLockTimer = new StopwatchTimer(SCAN_WIFI_LOCK, null, mUnpluggables);
         }
 
         @Override
@@ -980,17 +1335,17 @@ public final class BatteryStatsImpl extends BatteryStats {
         
         @Override 
         public long getWifiTurnedOnTime(long batteryRealtime, int which) {
-            return mWifiTurnedOnTimer.getTotalTime(batteryRealtime, which);
+            return mWifiTurnedOnTimer.getTotalTimeLocked(batteryRealtime, which);
         }
         
         @Override 
         public long getFullWifiLockTime(long batteryRealtime, int which) {
-            return mFullWifiLockTimer.getTotalTime(batteryRealtime, which);
+            return mFullWifiLockTimer.getTotalTimeLocked(batteryRealtime, which);
         }
         
         @Override 
         public long getScanWifiLockTime(long batteryRealtime, int which) {
-            return mScanWifiLockTimer.getTotalTime(batteryRealtime, which);
+            return mScanWifiLockTimer.getTotalTimeLocked(batteryRealtime, which);
         }
         
         @Override
@@ -1013,7 +1368,7 @@ public final class BatteryStatsImpl extends BatteryStats {
             if (mUserActivityCounters == null) {
                 return 0;
             }
-            return mUserActivityCounters[type].getCount(which);
+            return mUserActivityCounters[type].getCountLocked(which);
         }
         
         void initUserActivityLocked() {
@@ -1120,11 +1475,11 @@ public final class BatteryStatsImpl extends BatteryStats {
             mTcpBytesReceivedAtLastUnplug = in.readLong();
             mTcpBytesSentAtLastUnplug = in.readLong();
             mWifiTurnedOn = false;
-            mWifiTurnedOnTimer = new Timer(WIFI_TURNED_ON, null, mUnpluggables, in);
+            mWifiTurnedOnTimer = new StopwatchTimer(WIFI_TURNED_ON, null, mUnpluggables, in);
             mFullWifiLockOut = false;
-            mFullWifiLockTimer = new Timer(FULL_WIFI_LOCK, null, mUnpluggables, in);
+            mFullWifiLockTimer = new StopwatchTimer(FULL_WIFI_LOCK, null, mUnpluggables, in);
             mScanWifiLockOut = false;
-            mScanWifiLockTimer = new Timer(SCAN_WIFI_LOCK, null, mUnpluggables, in);
+            mScanWifiLockTimer = new StopwatchTimer(SCAN_WIFI_LOCK, null, mUnpluggables, in);
             if (in.readInt() == 0) {
                 mUserActivityCounters = null;
             } else {
@@ -1142,17 +1497,17 @@ public final class BatteryStatsImpl extends BatteryStats {
             /**
              * How long (in ms) this uid has been keeping the device partially awake.
              */
-            Timer mTimerPartial;
+            StopwatchTimer mTimerPartial;
 
             /**
              * How long (in ms) this uid has been keeping the device fully awake.
              */
-            Timer mTimerFull;
+            StopwatchTimer mTimerFull;
 
             /**
              * How long (in ms) this uid has had a window keeping the device awake.
              */
-            Timer mTimerWindow;
+            StopwatchTimer mTimerWindow;
 
             /**
              * Reads a possibly null Timer from a Parcel.  The timer is associated with the
@@ -1161,13 +1516,13 @@ public final class BatteryStatsImpl extends BatteryStats {
              * @param in the Parcel to be read from.
              * return a new Timer, or null.
              */
-            private Timer readTimerFromParcel(int type, ArrayList<Timer> pool,
+            private StopwatchTimer readTimerFromParcel(int type, ArrayList<StopwatchTimer> pool,
                     ArrayList<Unpluggable> unpluggables, Parcel in) {
                 if (in.readInt() == 0) {
                     return null;
                 }
 
-                return new Timer(type, pool, unpluggables, in);
+                return new StopwatchTimer(type, pool, unpluggables, in);
             }
 
             void readFromParcelLocked(ArrayList<Unpluggable> unpluggables, Parcel in) {
@@ -1198,24 +1553,24 @@ public final class BatteryStatsImpl extends BatteryStats {
 
         public final class Sensor extends BatteryStats.Uid.Sensor {
             final int mHandle;
-            Timer mTimer;
+            StopwatchTimer mTimer;
             
             public Sensor(int handle) {
                 mHandle = handle;
             }
 
-            private Timer readTimerFromParcel(ArrayList<Unpluggable> unpluggables,
+            private StopwatchTimer readTimerFromParcel(ArrayList<Unpluggable> unpluggables,
                     Parcel in) {
                 if (in.readInt() == 0) {
                     return null;
                 }
 
-                ArrayList<Timer> pool = mSensorTimers.get(mHandle);
+                ArrayList<StopwatchTimer> pool = mSensorTimers.get(mHandle);
                 if (pool == null) {
-                    pool = new ArrayList<Timer>();
+                    pool = new ArrayList<StopwatchTimer>();
                     mSensorTimers.put(mHandle, pool);
                 }
-                return new Timer(0, pool, unpluggables, in);
+                return new StopwatchTimer(0, pool, unpluggables, in);
             }
 
             void readFromParcelLocked(ArrayList<Unpluggable> unpluggables, Parcel in) {
@@ -1816,32 +2171,32 @@ public final class BatteryStatsImpl extends BatteryStats {
             return ss;
         }
 
-        public Timer getWakeTimerLocked(String name, int type) {
+        public StopwatchTimer getWakeTimerLocked(String name, int type) {
             Wakelock wl = mWakelockStats.get(name);
             if (wl == null) {
                 wl = new Wakelock();
                 mWakelockStats.put(name, wl);
             }
-            Timer t = null;
+            StopwatchTimer t = null;
             switch (type) {
                 case WAKE_TYPE_PARTIAL:
                     t = wl.mTimerPartial;
                     if (t == null) {
-                        t = new Timer(WAKE_TYPE_PARTIAL, mPartialTimers, mUnpluggables);
+                        t = new StopwatchTimer(WAKE_TYPE_PARTIAL, mPartialTimers, mUnpluggables);
                         wl.mTimerPartial = t;
                     }
                     return t;
                 case WAKE_TYPE_FULL:
                     t = wl.mTimerFull;
                     if (t == null) {
-                        t = new Timer(WAKE_TYPE_FULL, mFullTimers, mUnpluggables);
+                        t = new StopwatchTimer(WAKE_TYPE_FULL, mFullTimers, mUnpluggables);
                         wl.mTimerFull = t;
                     }
                     return t;
                 case WAKE_TYPE_WINDOW:
                     t = wl.mTimerWindow;
                     if (t == null) {
-                        t = new Timer(WAKE_TYPE_WINDOW, mWindowTimers, mUnpluggables);
+                        t = new StopwatchTimer(WAKE_TYPE_WINDOW, mWindowTimers, mUnpluggables);
                         wl.mTimerWindow = t;
                     }
                     return t;
@@ -1850,7 +2205,7 @@ public final class BatteryStatsImpl extends BatteryStats {
             }
         }
 
-        public Timer getSensorTimerLocked(int sensor, boolean create) {
+        public StopwatchTimer getSensorTimerLocked(int sensor, boolean create) {
             Sensor se = mSensorStats.get(sensor);
             if (se == null) {
                 if (!create) {
@@ -1859,36 +2214,36 @@ public final class BatteryStatsImpl extends BatteryStats {
                 se = new Sensor(sensor);
                 mSensorStats.put(sensor, se);
             }
-            Timer t = se.mTimer;
+            StopwatchTimer t = se.mTimer;
             if (t != null) {
                 return t;
             }
-            ArrayList<Timer> timers = mSensorTimers.get(sensor);
+            ArrayList<StopwatchTimer> timers = mSensorTimers.get(sensor);
             if (timers == null) {
-                timers = new ArrayList<Timer>();
+                timers = new ArrayList<StopwatchTimer>();
                 mSensorTimers.put(sensor, timers);
             }
-            t = new Timer(BatteryStats.SENSOR, timers, mUnpluggables);
+            t = new StopwatchTimer(BatteryStats.SENSOR, timers, mUnpluggables);
             se.mTimer = t;
             return t;
         }
 
         public void noteStartWakeLocked(String name, int type) {
-            Timer t = getWakeTimerLocked(name, type);
+            StopwatchTimer t = getWakeTimerLocked(name, type);
             if (t != null) {
                 t.startRunningLocked(BatteryStatsImpl.this);
             }
         }
 
         public void noteStopWakeLocked(String name, int type) {
-            Timer t = getWakeTimerLocked(name, type);
+            StopwatchTimer t = getWakeTimerLocked(name, type);
             if (t != null) {
                 t.stopRunningLocked(BatteryStatsImpl.this);
             }
         }
         
         public void noteStartSensor(int sensor) {
-            Timer t = getSensorTimerLocked(sensor, true);
+            StopwatchTimer t = getSensorTimerLocked(sensor, true);
             if (t != null) {
                 t.startRunningLocked(BatteryStatsImpl.this);
             }            
@@ -1896,21 +2251,21 @@ public final class BatteryStatsImpl extends BatteryStats {
 
         public void noteStopSensor(int sensor) {
             // Don't create a timer if one doesn't already exist
-            Timer t = getSensorTimerLocked(sensor, false);
+            StopwatchTimer t = getSensorTimerLocked(sensor, false);
             if (t != null) {
                 t.stopRunningLocked(BatteryStatsImpl.this);
             }            
         }
         
         public void noteStartGps() {
-            Timer t = getSensorTimerLocked(Sensor.GPS, true);
+            StopwatchTimer t = getSensorTimerLocked(Sensor.GPS, true);
             if (t != null) {
                 t.startRunningLocked(BatteryStatsImpl.this);
             }  
         }
         
         public void noteStopGps() {
-            Timer t = getSensorTimerLocked(Sensor.GPS, false);
+            StopwatchTimer t = getSensorTimerLocked(Sensor.GPS, false);
             if (t != null) {
                 t.stopRunningLocked(BatteryStatsImpl.this);
             }  
@@ -1925,21 +2280,21 @@ public final class BatteryStatsImpl extends BatteryStats {
         mFile = new File(filename);
         mBackupFile = new File(filename + ".bak");
         mStartCount++;
-        mScreenOnTimer = new Timer(-1, null, mUnpluggables);
+        mScreenOnTimer = new StopwatchTimer(-1, null, mUnpluggables);
         for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
-            mScreenBrightnessTimer[i] = new Timer(-100-i, null, mUnpluggables);
+            mScreenBrightnessTimer[i] = new StopwatchTimer(-100-i, null, mUnpluggables);
         }
         mInputEventCounter = new Counter(mUnpluggables);
-        mPhoneOnTimer = new Timer(-2, null, mUnpluggables);
+        mPhoneOnTimer = new StopwatchTimer(-2, null, mUnpluggables);
         for (int i=0; i<NUM_SIGNAL_STRENGTH_BINS; i++) {
-            mPhoneSignalStrengthsTimer[i] = new Timer(-200-i, null, mUnpluggables);
+            mPhoneSignalStrengthsTimer[i] = new StopwatchTimer(-200-i, null, mUnpluggables);
         }
         for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
-            mPhoneDataConnectionsTimer[i] = new Timer(-300-i, null, mUnpluggables);
+            mPhoneDataConnectionsTimer[i] = new StopwatchTimer(-300-i, null, mUnpluggables);
         }
-        mWifiOnTimer = new Timer(-3, null, mUnpluggables);
-        mWifiRunningTimer = new Timer(-4, null, mUnpluggables);
-        mBluetoothOnTimer = new Timer(-5, null, mUnpluggables);
+        mWifiOnTimer = new StopwatchTimer(-3, null, mUnpluggables);
+        mWifiRunningTimer = new StopwatchTimer(-4, null, mUnpluggables);
+        mBluetoothOnTimer = new StopwatchTimer(-5, null, mUnpluggables);
         mOnBattery = mOnBatteryInternal = false;
         mTrackBatteryPastUptime = 0;
         mTrackBatteryPastRealtime = 0;
@@ -1967,6 +2322,7 @@ public final class BatteryStatsImpl extends BatteryStats {
 
     public void setOnBattery(boolean onBattery, int level) {
         synchronized(this) {
+            updateKernelWakelocksLocked();
             if (mOnBattery != onBattery) {
                 mOnBattery = mOnBatteryInternal = onBattery;
                 
@@ -1998,6 +2354,35 @@ public final class BatteryStatsImpl extends BatteryStats {
     public void recordCurrentLevel(int level) {
         mDischargeCurrentLevel = level;
     }
+    
+    public void updateKernelWakelocksLocked() {
+        Map<String, KernelWakelockStats> m = readKernelWakelockStats();
+        
+        for (Map.Entry<String, KernelWakelockStats> ent : m.entrySet()) {
+            String name = ent.getKey();
+            KernelWakelockStats kws = ent.getValue();
+        
+            SamplingTimer kwlt = mKernelWakelockStats.get(name);
+            if (kwlt == null) {
+                kwlt = new SamplingTimer(mUnpluggables, mOnBatteryInternal, 
+                        true /* track reported values */);
+                mKernelWakelockStats.put(name, kwlt);
+            }
+            kwlt.updateCurrentReportedCount(kws.mCount);
+            kwlt.updateCurrentReportedTotalTime(kws.mTotalTime);
+            kwlt.setUpdateVersion(sKernelWakelockUpdateVersion);
+        }
+        
+        if (m.size() != mKernelWakelockStats.size()) {
+            // Set timers to stale if they didn't appear in /proc/wakelocks this time.
+            for (Map.Entry<String, SamplingTimer> ent : mKernelWakelockStats.entrySet()) {
+                SamplingTimer st = ent.getValue();
+                if (st.getUpdateVersion() != sKernelWakelockUpdateVersion) {
+                    st.setStale();
+                }
+            }
+        }
+    }
 
     public long getAwakeTimeBattery() {
         return computeBatteryUptime(getBatteryUptimeLocked(), STATS_CURRENT);
@@ -2296,6 +2681,14 @@ public final class BatteryStatsImpl extends BatteryStats {
         mBluetoothOn = false;
         mBluetoothOnTimer.readSummaryFromParcelLocked(in);
 
+        int NKW = in.readInt();
+        for (int ikw = 0; ikw < NKW; ikw++) {
+            if (in.readInt() != 0) {
+                String kwltName = in.readString();
+                getKernelWakelockTimerLocked(kwltName).readSummaryFromParcelLocked(in);
+            }
+        }
+        
         final int NU = in.readInt();
         for (int iu = 0; iu < NU; iu++) {
             int uid = in.readInt();
@@ -2420,6 +2813,18 @@ public final class BatteryStatsImpl extends BatteryStats {
         mWifiRunningTimer.writeSummaryFromParcelLocked(out, NOWREAL);
         mBluetoothOnTimer.writeSummaryFromParcelLocked(out, NOWREAL);
 
+        out.writeInt(mKernelWakelockStats.size());
+        for (Map.Entry<String, SamplingTimer> ent : mKernelWakelockStats.entrySet()) {
+            Timer kwlt = ent.getValue();
+            if (kwlt != null) {
+                out.writeInt(1);
+                out.writeString(ent.getKey());
+                ent.getValue().writeSummaryFromParcelLocked(out, NOWREAL);
+            } else {
+                out.writeInt(0);
+            }
+        }
+        
         final int NU = mUidStats.size();
         out.writeInt(NU);
         for (int iu = 0; iu < NU; iu++) {
@@ -2548,25 +2953,25 @@ public final class BatteryStatsImpl extends BatteryStats {
         mBatteryRealtime = in.readLong();
         mBatteryLastRealtime = in.readLong();
         mScreenOn = false;
-        mScreenOnTimer = new Timer(-1, null, mUnpluggables, in);
+        mScreenOnTimer = new StopwatchTimer(-1, null, mUnpluggables, in);
         for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
-            mScreenBrightnessTimer[i] = new Timer(-100-i, null, mUnpluggables, in);
+            mScreenBrightnessTimer[i] = new StopwatchTimer(-100-i, null, mUnpluggables, in);
         }
         mInputEventCounter = new Counter(mUnpluggables, in);
         mPhoneOn = false;
-        mPhoneOnTimer = new Timer(-2, null, mUnpluggables, in);
+        mPhoneOnTimer = new StopwatchTimer(-2, null, mUnpluggables, in);
         for (int i=0; i<NUM_SIGNAL_STRENGTH_BINS; i++) {
-            mPhoneSignalStrengthsTimer[i] = new Timer(-200-i, null, mUnpluggables, in);
+            mPhoneSignalStrengthsTimer[i] = new StopwatchTimer(-200-i, null, mUnpluggables, in);
         }
         for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
-            mPhoneDataConnectionsTimer[i] = new Timer(-300-i, null, mUnpluggables, in);
+            mPhoneDataConnectionsTimer[i] = new StopwatchTimer(-300-i, null, mUnpluggables, in);
         }
         mWifiOn = false;
-        mWifiOnTimer = new Timer(-2, null, mUnpluggables, in);
+        mWifiOnTimer = new StopwatchTimer(-2, null, mUnpluggables, in);
         mWifiRunning = false;
-        mWifiRunningTimer = new Timer(-2, null, mUnpluggables, in);
+        mWifiRunningTimer = new StopwatchTimer(-2, null, mUnpluggables, in);
         mBluetoothOn = false;
-        mBluetoothOnTimer = new Timer(-2, null, mUnpluggables, in);
+        mBluetoothOnTimer = new StopwatchTimer(-2, null, mUnpluggables, in);
         mUptime = in.readLong();
         mUptimeStart = in.readLong();
         mLastUptime = in.readLong();
@@ -2585,6 +2990,16 @@ public final class BatteryStatsImpl extends BatteryStats {
         mDischargeCurrentLevel = in.readInt();
         mLastWriteTime = in.readLong();
 
+        mKernelWakelockStats.clear();
+        int NKW = in.readInt();
+        for (int ikw = 0; ikw < NKW; ikw++) {
+            if (in.readInt() != 0) {
+                String wakelockName = in.readString();
+                SamplingTimer kwlt = new SamplingTimer(mUnpluggables, mOnBattery, in);
+                mKernelWakelockStats.put(wakelockName, kwlt);
+            }
+        }
+        
         mPartialTimers.clear();
         mFullTimers.clear();
         mWindowTimers.clear();
@@ -2648,6 +3063,18 @@ public final class BatteryStatsImpl extends BatteryStats {
         out.writeInt(mDischargeCurrentLevel);
         out.writeLong(mLastWriteTime);
 
+        out.writeInt(mKernelWakelockStats.size());
+        for (Map.Entry<String, SamplingTimer> ent : mKernelWakelockStats.entrySet()) {
+            SamplingTimer kwlt = ent.getValue();
+            if (kwlt != null) {
+                out.writeInt(1);
+                out.writeString(ent.getKey());
+                Timer.writeTimerToParcel(out, kwlt, batteryRealtime);
+            } else {
+                out.writeInt(0);
+            }
+        }
+        
         int size = mUidStats.size();
         out.writeInt(size);
         for (int i = 0; i < size; i++) {