COMPARATIVE STUDY OF MEMORY OPTIMIZATION IN ANDROID SYSTEM

Abstract

No embedded system is possible without a memory inside as memory is important part of any system. So managing the memory is a crucial part of work in the System. That is why memory management is the most complex part of operating system. Whenever an operating system is decided for any devices the device memory and OS capabilities are matched. Choice of Android for the Mobile Phones give best combination of under lying hardware and software capabilities. In lined with the choice of OS, Android provides improved Memory Management than Linux. Android also provides the in build policy for handling with the low memory scenarios. But as the performance has no limit to achieve and daily user requirements for faster and bulky software needs further optimizations. Here in this thesis our aim is to focus on the RAM availability for the System. More system RAM means improved sluggish behavior with enhanced degree of multi programming and responsiveness. We studied various method of in kernel compression to achieve goal of improved RAM. These methods are Com-Cache, zSWAP, KSM. These methods are not in the proper shape to use with Android Operating System and Android Low Memory Policy situation. After deep analysis here to enhance the RAM availability we need to change the Android Low Memory Policy and modified com-cache and KSM implementations to suite the Mobile Phones. KSM utilizes the CPU heavily and drain out battery very fast and Com-Cache is not compatible with the LMK in its raw form. These techniques are modified and also changed Android Low memory Policy and these results in batter RAM availability to the system.