am c38ffecc: Merge "Moving BTtraffic from experiment location to here" into cw-d-mr1-dev

* commit 'c38ffecc348687ae30c5fa2dc1761d9138b406b6':
  Moving BTtraffic from experiment location to here

10 files changed, 690 insertions, 0 deletions

diff --git a/core/tests/BTtraffic/Android.mk b/core/tests/BTtraffic/Android.mk
new file mode 100644
index 0000000..7d83527
--- /dev/null
+++ b/core/tests/BTtraffic/Android.mk
@@ -0,0 +1,16 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_RESOURCE_DIR := \
+    $(LOCAL_PATH)/res
+
+LOCAL_PACKAGE_NAME := bttraffic
+LOCAL_CERTIFICATE := platform
+
+include $(BUILD_PACKAGE)
+
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/core/tests/BTtraffic/AndroidManifest.xml b/core/tests/BTtraffic/AndroidManifest.xml
new file mode 100644
index 0000000..00d9707
--- /dev/null
+++ b/core/tests/BTtraffic/AndroidManifest.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.google.android.experimental.bttraffic" >
+
+    <uses-permission android:name="android.permission.BLUETOOTH"/>
+    <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL"/>
+
+    <uses-sdk
+        android:minSdkVersion="18"
+        android:targetSdkVersion="18"
+        />
+    <application
+        android:allowBackup="false"
+        android:label="@string/app_name" >
+        <service
+            android:name=".BTtraffic"
+            android:enabled="true"
+            android:exported="true" >
+        </service>
+    </application>
+
+</manifest>
diff --git a/core/tests/BTtraffic/README b/core/tests/BTtraffic/README
new file mode 100644
index 0000000..430488f
--- /dev/null
+++ b/core/tests/BTtraffic/README
@@ -0,0 +1,45 @@
+This is a tool to generate classic Bluetooth traffic with specified period and package size.
+Together with the SvcMonitor, which will be called automatically in this android service, can be
+used to measure the CPU usage from the Java layer Bluetooth code and the underlying system service
+com.android.bluetooth.
+
+1. Server (Listener) - Client (Sender) model. Both run as an Android service.
+2. No pairing needed. Communicate via unsecured RFcomm. Client establishes the connection by
+providing the MAC addr of the server.
+3. Bluetooth has to be turned on on both side.
+4. Client can configure the traffic by specifying the transfer period and package size.
+5. A separate monitor process will be automatically forked and will be reading from /proc file
+system to calculate the cpu usage. The measurement is updated once per second.
+6. The monitor process (com.google.android.experimental.svcmonitor/.ScvMonitor) can be run as an
+independent service to measure cpu usage on any similarly configured tests (e.g. wifi, BLE). Refer
+to SvcMonitor's README for usage and details.
+
+Usage:
+To instal the test:
+On both the server and client device, install the 2 apk:
+$ adb install $OUT/system/app/bttraffic/bttraffic.apk
+$ adb install $OUT/system/app/svcmonitor/svcmonitor.apk
+
+To start the service on the SERVER side:
+$ adb shell am startservice -a start --ez ack true \
+com.google.android.experimental.bttraffic/.BTtraffic
+
+To start the service on the CLIENT side:
+$ adb shell am startservice -a start \
+-e addr "F8:A9:D0:A8:74:8E" --ei size 1000 --ei period 15 \
+com.google.android.experimental.bttraffic/.BTtraffic
+
+To stop the test:
+On either the server or client:
+$ adb shell am startservice -a stop \
+com.google.android.experimental.bttraffic/.BTtraffic
+
+To look at the data:
+$ adb logcat | grep bttraffic
+
+Options:
+-e addr: MAC addr of the server, in uppercase letter.
+--ei size: package size, unit: byte; default: 1024, MAX: 20MB
+--ei period: system sleep time between sending each package, unit: ms, default: 5000
+                  ** if -1 is provided, client will only send the package once.
+--ez ack: whether acknowledge is required (true/false)
diff --git a/core/tests/BTtraffic/res/values/strings.xml b/core/tests/BTtraffic/res/values/strings.xml
new file mode 100644
index 0000000..e70276e
--- /dev/null
+++ b/core/tests/BTtraffic/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Bluetooth Test</string>
+</resources>
diff --git a/core/tests/BTtraffic/src/com/android/google/experimental/bttraffic/BTtraffic.java b/core/tests/BTtraffic/src/com/android/google/experimental/bttraffic/BTtraffic.java
new file mode 100644
index 0000000..286c0aa
--- /dev/null
+++ b/core/tests/BTtraffic/src/com/android/google/experimental/bttraffic/BTtraffic.java
@@ -0,0 +1,328 @@
+package com.google.android.experimental.bttraffic;
+
+import android.app.Service;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothServerSocket;
+import android.bluetooth.BluetoothSocket;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.os.SystemClock;
+import android.util.Log;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.Exception;
+import java.lang.Runtime;
+import java.lang.RuntimeException;
+import java.lang.Process;
+import java.nio.ByteBuffer;
+import java.util.Random;
+import java.util.Set;
+import java.util.UUID;
+
+public class BTtraffic extends Service {
+    public static final String TAG = "bttraffic";
+    static final String SERVICE_NAME = "bttraffic";
+    static final String SYS_SERVICE_NAME = "com.android.bluetooth";
+    static final UUID SERVICE_UUID = UUID.fromString("5e8945b0-1234-5432-a5e2-0800200c9a67");
+    volatile Thread mWorkerThread;
+    volatile boolean isShuttingDown = false;
+    volatile boolean isServer = false;
+
+    public BTtraffic() {}
+
+    static void safeClose(Closeable closeable) {
+        try {
+            closeable.close();
+        } catch (IOException e) {
+            Log.d(TAG, "Unable to close resource.\n");
+        }
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        if (intent == null) {
+            stopSelf();
+            return 0;
+        }
+        if ("stop".equals(intent.getAction())) {
+            stopService();
+        } else if ("start".equals(intent.getAction())) {
+            startWorker(intent);
+        } else {
+            Log.d(TAG, "unknown action: + " + intent.getAction());
+        }
+        return 0;
+    }
+
+    private void startWorker(Intent intent) {
+        if (mWorkerThread != null) {
+            Log.d(TAG, "worker thread already active");
+            return;
+        }
+        isShuttingDown = false;
+        String remoteAddr = intent.getStringExtra("addr");
+        Log.d(TAG, "startWorker: addr=" + remoteAddr);
+        Runnable worker =
+                remoteAddr == null
+                        ? new ListenerRunnable(this, intent)
+                        : new SenderRunnable(this, remoteAddr, intent);
+        isServer = remoteAddr == null ? true: false;
+        mWorkerThread = new Thread(worker, "BTtrafficWorker");
+        try {
+            startMonitor();
+            Log.d(TAG, "Monitor service started");
+            mWorkerThread.start();
+            Log.d(TAG, "Worker thread started");
+        } catch (Exception e) {
+            Log.d(TAG, "Failed to start service", e);
+        }
+    }
+
+    private void startMonitor()
+            throws Exception {
+        if (isServer) {
+            Log.d(TAG, "Start monitor on server");
+            String[] startmonitorCmd = {
+                    "/system/bin/am",
+                    "startservice",
+                    "-a", "start",
+                    "-e", "java", SERVICE_NAME,
+                    "-e", "hal", SYS_SERVICE_NAME,
+                    "com.google.android.experimental.svcmonitor/.SvcMonitor"
+            };
+            Process ps = new ProcessBuilder()
+                    .command(startmonitorCmd)
+                    .redirectErrorStream(true)
+                    .start();
+        } else {
+            Log.d(TAG, "No need to start SvcMonitor on client");
+        }
+    }
+
+    private void stopMonitor()
+            throws Exception {
+        if (isServer) {
+            Log.d(TAG, "StopMonitor on server");
+            String[] stopmonitorCmd = {
+                    "/system/bin/am",
+                    "startservice",
+                    "-a", "stop",
+                    "com.google.android.experimental.svcmonitor/.SvcMonitor"
+            };
+            Process ps = new ProcessBuilder()
+                    .command(stopmonitorCmd)
+                    .redirectErrorStream(true)
+                    .start();
+        } else {
+            Log.d(TAG, "No need to stop Svcmonitor on client");
+        }
+    }
+
+    public void stopService() {
+        if (mWorkerThread == null) {
+            Log.d(TAG, "no active thread");
+            return;
+        }
+
+        isShuttingDown = true;
+
+        try {
+            stopMonitor();
+        } catch (Exception e) {
+            Log.d(TAG, "Unable to stop SvcMonitor!", e);
+        }
+
+        if (Thread.currentThread() != mWorkerThread) {
+            mWorkerThread.interrupt();
+            Log.d(TAG, "Interrupting thread");
+            try {
+                mWorkerThread.join();
+            } catch (InterruptedException e) {
+                Log.d(TAG, "Unable to join thread!");
+            }
+        }
+
+        mWorkerThread = null;
+        stopSelf();
+        Log.d(TAG, "Service stopped");
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        throw new UnsupportedOperationException("Not yet implemented");
+    }
+
+    public static class ListenerRunnable implements Runnable {
+        private final BTtraffic bttraffic;
+        private final boolean sendAck;
+        private Intent intent;
+        private final int maxbuffersize = 20 * 1024 * 1024;
+
+        public ListenerRunnable(BTtraffic bttraffic, Intent intent) {
+            this.bttraffic = bttraffic;
+            this.sendAck = intent.getBooleanExtra("ack", true);
+            this.intent = intent;
+        }
+
+        @Override
+        public void run() {
+            BluetoothServerSocket serverSocket;
+
+            try {
+                Log.d(TAG, "getting server socket");
+                serverSocket = BluetoothAdapter.getDefaultAdapter()
+                        .listenUsingInsecureRfcommWithServiceRecord(
+                                SERVICE_NAME, SERVICE_UUID);
+            } catch (IOException e) {
+                Log.d(TAG, "error creating server socket, stopping thread");
+                bttraffic.stopService();
+                return;
+            }
+
+            Log.d(TAG, "got server socket, starting accept loop");
+            BluetoothSocket socket = null;
+            try {
+                Log.d(TAG, "accepting");
+                socket = serverSocket.accept();
+
+                if (!Thread.interrupted()) {
+                    Log.d(TAG, "accepted, listening");
+                    doListening(socket.getInputStream(), socket.getOutputStream());
+                    Log.d(TAG, "listen finished");
+                }
+            } catch (IOException e) {
+                Log.d(TAG, "error while accepting or listening", e);
+            } finally {
+                Log.d(TAG, "Linster interruped");
+                Log.d(TAG, "closing socket and stopping service");
+                safeClose(serverSocket);
+                safeClose(socket);
+                if (!bttraffic.isShuttingDown)
+                    bttraffic.stopService();
+            }
+
+        }
+
+        private void doListening(InputStream inputStream, OutputStream outputStream)
+                throws IOException {
+            ByteBuffer byteBuffer = ByteBuffer.allocate(maxbuffersize);
+
+            while (!Thread.interrupted()) {
+                readBytesIntoBuffer(inputStream, byteBuffer, 4);
+                byteBuffer.flip();
+                int length = byteBuffer.getInt();
+                if (Thread.interrupted())
+                    break;
+                readBytesIntoBuffer(inputStream, byteBuffer, length);
+
+                if (sendAck)
+                    outputStream.write(0x55);
+            }
+        }
+
+        void readBytesIntoBuffer(InputStream inputStream, ByteBuffer byteBuffer, int numToRead)
+                throws IOException {
+            byteBuffer.clear();
+            while (true) {
+                int position = byteBuffer.position();
+                int remaining = numToRead - position;
+                if (remaining == 0) {
+                    break;
+                }
+                int count = inputStream.read(byteBuffer.array(), position, remaining);
+                if (count < 0) {
+                    throw new IOException("read the EOF");
+                }
+                byteBuffer.position(position + count);
+            }
+        }
+    }
+
+    public static class SenderRunnable implements Runnable {
+        private final BTtraffic bttraffic;
+        private final String remoteAddr;
+        private final int pkgsize, period;
+        private final int defaultpkgsize = 1024;
+        private final int defaultperiod = 5000;
+        private static ByteBuffer lengthBuffer = ByteBuffer.allocate(4);
+
+        public SenderRunnable(BTtraffic bttraffic, String remoteAddr, Intent intent) {
+            this.bttraffic = bttraffic;
+            this.remoteAddr = remoteAddr;
+            this.pkgsize = intent.getIntExtra("size", defaultpkgsize);
+            this.period = intent.getIntExtra("period", defaultperiod);
+        }
+
+        @Override
+        public void run() {
+            BluetoothDevice device = null;
+            try {
+                device = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(remoteAddr);
+            } catch (IllegalArgumentException e) {
+                Log.d(TAG, "Invalid BT MAC address!\n");
+            }
+            if (device == null) {
+                Log.d(TAG, "can't find matching device, stopping thread and service");
+                bttraffic.stopService();
+                return;
+            }
+
+            BluetoothSocket socket = null;
+            try {
+                Log.d(TAG, "connecting to device with MAC addr: " + remoteAddr);
+                socket = device.createInsecureRfcommSocketToServiceRecord(SERVICE_UUID);
+                socket.connect();
+                Log.d(TAG, "connected, starting to send");
+                doSending(socket.getOutputStream());
+                Log.d(TAG, "send stopped, stopping service");
+            } catch (Exception e) {
+                Log.d(TAG, "error while sending", e);
+            } finally {
+                Log.d(TAG, "finishing, closing thread and service");
+                safeClose(socket);
+                if (!bttraffic.isShuttingDown)
+                    bttraffic.stopService();
+            }
+        }
+
+        private void doSending(OutputStream outputStream) throws IOException {
+            Log.w(TAG, "doSending");
+            try {
+                Random random = new Random(System.currentTimeMillis());
+
+                byte[] bytes = new byte[pkgsize];
+                random.nextBytes(bytes);
+                while (!Thread.interrupted()) {
+                    writeBytes(outputStream, bytes.length);
+                    outputStream.write(bytes, 0, bytes.length);
+                    if (period < 0)
+                        break;
+                    if (period == 0)
+                        continue;
+
+                    SystemClock.sleep(period);
+                }
+                Log.d(TAG, "Sender interrupted");
+            } catch (IOException e) {
+                Log.d(TAG, "doSending got error", e);
+            }
+        }
+
+        private static void writeBytes(OutputStream outputStream, int value) throws IOException {
+            lengthBuffer.putInt(value);
+            lengthBuffer.flip();
+            outputStream.write(lengthBuffer.array(), lengthBuffer.position(), lengthBuffer.limit());
+        }
+    }
+
+}
diff --git a/core/tests/SvcMonitor/Android.mk b/core/tests/SvcMonitor/Android.mk
new file mode 100644
index 0000000..2b80455
--- /dev/null
+++ b/core/tests/SvcMonitor/Android.mk
@@ -0,0 +1,16 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_RESOURCE_DIR := \
+    $(LOCAL_PATH)/res
+
+LOCAL_PACKAGE_NAME := svcmonitor
+LOCAL_CERTIFICATE := platform
+
+include $(BUILD_PACKAGE)
+
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/core/tests/SvcMonitor/AndroidManifest.xml b/core/tests/SvcMonitor/AndroidManifest.xml
new file mode 100644
index 0000000..de5a9bd
--- /dev/null
+++ b/core/tests/SvcMonitor/AndroidManifest.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.google.android.experimental.svcmonitor" >
+
+    <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL"/>
+
+    <uses-sdk
+        android:minSdkVersion="18"
+        android:targetSdkVersion="18"
+        />
+    <application
+        android:allowBackup="false"
+        android:label="@string/app_name" >
+        <service
+            android:name=".SvcMonitor"
+            android:enabled="true"
+            android:exported="true" >
+        </service>
+    </application>
+
+</manifest>
diff --git a/core/tests/SvcMonitor/README b/core/tests/SvcMonitor/README
new file mode 100644
index 0000000..13a4380
--- /dev/null
+++ b/core/tests/SvcMonitor/README
@@ -0,0 +1,27 @@
+This Android service measures CPU usage of a program and an underlying system service it relies on.
+An example of this would be an android app XYZ communicates to some other device via Bluetooth. The
+SvcMonitor service can monitor the CPU usage of XYZ and com.android.bluetooth.
+
+Usage:
+
+To start the service:
+$ adb shell am startservice -a start \
+-e java XYZ -e hal com.android.bluetooth \
+com.google.android.experimental.svcmonitor/.SvcMonitor
+
+To stop the service:
+$ adb shell am startservice -a stop \
+com.google.android.experimental.svcmonitor/.SvcMonitor
+
+To stop the service config:
+$ adb shell am startservice -a change \
+-e java NewName -e hal NewService \
+com.google.android.experimental.svcmonitor/.SvcMonitor
+
+To monitor the data:
+$ adb logcat | grep XYZ
+
+Options:
+-e java NameOfProgram: any running process’s name.
+-e hal NameOfSysService: name of the system service the previous process relies on.
+--ei period: period between each measurement (frequency). Unit: ms, Default:1000, Min: 100
diff --git a/core/tests/SvcMonitor/res/values/strings.xml b/core/tests/SvcMonitor/res/values/strings.xml
new file mode 100644
index 0000000..e70276e
--- /dev/null
+++ b/core/tests/SvcMonitor/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Bluetooth Test</string>
+</resources>
diff --git a/core/tests/SvcMonitor/src/com/android/google/experimental/svcmoniter/SvcMonitor.java b/core/tests/SvcMonitor/src/com/android/google/experimental/svcmoniter/SvcMonitor.java
new file mode 100644
index 0000000..a451445
--- /dev/null
+++ b/core/tests/SvcMonitor/src/com/android/google/experimental/svcmoniter/SvcMonitor.java
@@ -0,0 +1,209 @@
+package com.google.android.experimental.svcmonitor;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+import android.os.SystemClock;
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.lang.Runnable;
+import java.lang.Thread;
+import java.util.Set;
+
+public class SvcMonitor extends Service {
+    public static final String TAG = "svcmonitor";
+    String javaProc, halProc;
+    volatile Thread tMonitor;
+    int period;
+
+    public SvcMonitor() {};
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        if (intent == null) {
+            stopSelf();
+            return 0;
+        }
+        Log.d(TAG, "Starting SvcMonitor");
+        if ("stop".equals(intent.getAction())) {
+            stopService();
+        } else if ("start".equals(intent.getAction())) {
+            startMonitor(intent);
+        } else if ("change".equals(intent.getAction())) {
+            changeConfig(intent);
+        } else {
+            Log.d(TAG, "unknown action: + " + intent.getAction());
+        }
+        return 0;
+    }
+
+    private void changeConfig(Intent intent) {
+        if (tMonitor == null) {
+            Log.d(TAG, "Service not active. Start service first");
+            return;
+        }
+        stopThread();
+        startMonitor(intent);
+    }
+
+    private void startMonitor(Intent intent) {
+        if (tMonitor != null) {
+            Log.d(TAG, "thread already active");
+            return;
+        }
+        javaProc = intent.getStringExtra("java");
+        halProc = intent.getStringExtra("hal");
+        period = intent.getIntExtra("period", 1000);
+        if (javaProc == null || halProc == null || period < 100) {
+            Log.d(TAG, "Failed starting monitor, invalid arguments.");
+            stopSelf();
+            return;
+        }
+        Runnable monitor = new MonitorRunnable(this);
+        tMonitor = new Thread(monitor);
+        tMonitor.start();
+    }
+
+    private void stopService() {
+        stopThread();
+        stopSelf();
+        Log.d(TAG, "SvcMonitor stopped");
+    }
+
+    private void stopThread() {
+        if (tMonitor == null) {
+            Log.d(TAG, "no active thread");
+            return;
+        }
+        Log.d(TAG, "interrupting monitor thread");
+        tMonitor.interrupt();
+        try {
+            tMonitor.join();
+        } catch (InterruptedException e) {
+            Log.d(TAG, "Unable to finish monitor thread");
+        }
+        tMonitor = null;
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        throw new UnsupportedOperationException("Not yet implemented");
+    }
+
+    public static class MonitorRunnable implements Runnable {
+        long java_time_old, hal_time_old, cpu_time_old = -1;
+        String javaPID, halPID;
+        SvcMonitor svcmonitor;
+        static String javaProcTAG;
+        int period;
+
+        public MonitorRunnable(SvcMonitor svcmonitor) {
+            this.svcmonitor = svcmonitor;
+            this.period = svcmonitor.period;
+            javaPID = getPIDof(svcmonitor.javaProc);
+            halPID = getPIDof(svcmonitor.halProc);
+            java_time_old = getPsTime(javaPID);
+            hal_time_old = getPsTime(halPID);
+            cpu_time_old = getPsTime("");
+            javaProcTAG = String.valueOf(svcmonitor.javaProc.toCharArray());
+        }
+
+        @Override
+        public void run() {
+            if (halPID.isEmpty() || javaPID.isEmpty()) {
+                Log.d(javaProcTAG, "No such process: " +
+                        (halPID.isEmpty() ? svcmonitor.halProc : svcmonitor.javaProc));
+                return;
+            }
+            while (!Thread.interrupted()) {
+                calculateUsage();
+                SystemClock.sleep(period);
+            }
+            Log.d(TAG, "Stopping monitor thread");
+        }
+
+        private void calculateUsage() {
+            long java_time = getPsTime(javaPID);
+            long hal_time = getPsTime(halPID);
+            long cpu_time = getPsTime("");
+
+            if (cpu_time_old >= 0) {
+                float java_diff = (float) (java_time - java_time_old);
+                float hal_diff = (float) (hal_time - hal_time_old);
+                float cpu_diff = (float) (cpu_time - cpu_time_old);
+                Log.w(javaProcTAG, "\n----------------\n");
+                Log.w(javaProcTAG, "JAVA level CPU: "
+                        + (java_diff * 100.0 / cpu_diff) + "%\n");
+                Log.w(javaProcTAG, " HAL level CPU: "
+                        + (hal_diff * 100.0 / cpu_diff) + "%\n");
+                Log.w(javaProcTAG, " SYS level CPU: "
+                        + ((java_diff + hal_diff) * 100.0 / cpu_diff) + "%\n");
+            } else {
+                Log.w(TAG, "Waiting for status\n");
+            }
+
+            java_time_old = java_time;
+            hal_time_old = hal_time;
+            cpu_time_old = cpu_time;
+        }
+
+        private String getPIDof(String psName) {
+            String pid = "";
+
+            try {
+                String[] cmd = {"/system/bin/sh", "-c", "ps | grep " + psName};
+                Process ps = Runtime.getRuntime().exec(cmd);
+                BufferedReader in = new BufferedReader(
+                        new InputStreamReader(ps.getInputStream()));
+                String temp = in.readLine();
+                if (temp == null || temp.isEmpty())
+                    throw new IOException("No such process: " + psName);
+                pid = temp.split(" +")[1];
+                in.close();
+            } catch (IOException e) {
+                Log.d(javaProcTAG, "Error finding PID of process: " + psName + "\n", e);
+            }
+            return pid;
+        }
+
+        private long getPsTime(String pid) {
+            String psStat = getPsStat("/" + pid);
+            String[] statBreakDown = psStat.split(" +");
+            long psTime;
+
+            if (pid.isEmpty()) {
+                psTime = Long.parseLong(statBreakDown[1])
+                        + Long.parseLong(statBreakDown[2])
+                        + Long.parseLong(statBreakDown[3])
+                        + Long.parseLong(statBreakDown[4]);
+            } else {
+                psTime = Long.parseLong(statBreakDown[13])
+                        + Long.parseLong(statBreakDown[14]);
+            }
+
+            return psTime;
+        }
+
+        private String getPsStat(String psname) {
+            String stat = "";
+            try {
+                FileInputStream fs = new FileInputStream("/proc" + psname + "/stat");
+                BufferedReader br = new BufferedReader(new InputStreamReader(fs));
+                stat = br.readLine();
+                fs.close();
+            } catch (IOException e) {
+                Log.d(TAG, "Error retreiving stat. \n");
+            }
+            return stat;
+        }
+    }
+}