Extended process scheduler for improving user experience in multi-core mobile systems

Mobile phone is being well integrated into people's daily life. Due to a large amount of time spending with them, users expect to have a good experience for their daily tasks. The mobile operating system's scheduler is in charge of distributing CPU computational power among these tasks. However, it currently has not yet taken into account dynamic frequencies of CPU cores at runtime. This unawareness of the scheduler with CPU frequency increases unresponsiveness of user interface to user interactions, and consequently reduces user experience on using mobile devices. In this paper, we propose an extension of process scheduler which takes into account the dynamic CPU frequency when scheduling the tasks. Our method increases smoothness of user interface to user interactions by lowering and stabilizing interface frame times. Experimental results show that our proposed scheduler reduces amount of frame time peaks up to 40%, which helps greatly in improving user experience on mobile devices.