Download An Application Profiler for Android

An Application Profiler for
Android
CSC 714 - FALL 2011
Arash Rezaei, Gopikannan Venugopalsamy
Problem statement
• Application profiling in Android, for the
purpose of finding behavior patterns of
applications
• The identified behavior patterns helps to
differentiate the applications that consume
suspicious level/patterns of resources
• Android assigns each application a
– UID: unique number at install time
– PID (Process ID)
Resources Monitoring
• Two monitoring service
– Time based
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•
•
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Memory usage
CPU usage
Sensor usage
Network usage
– Event Based
• File System Monitoring
Resources Monitoring(cont.)
• Memory usage: The ActivityManager is used to get all the running
process information and also the memory usage of each application
given their pids.
– Includes Pss, PrivateDirty and sharedDirty
• Sensor Usage: Sensor manager is the service that handles all kinds
of sensors in device. Batterystats.Uid.sensor is a package that is used
to obtain statistics of sensor usage of an application.
• CPU Usage: The package "android.os.BatteryStats.proc" is used
along the Uid of the process to get the
– user time
– system time
– foreground time
The sum of these is multiplied along the power factor which gives
us the CPU usage of that application.
Resources Monitoring(cont.)
• Network usage: (TrafficStats) for each App.
– No. of TCP/UDP payload bytes sent/received
– No. of TCP/UDP packets sent/received
– No. of TCP segments sent/received
• File System Monitoring: (Event driven)
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File X is created
File X is opened
File X is closed
File X is modified
File X written and closed