Performance and power efficient task scheduling in VFI-based multi-core systems

With voltage frequency islanding (VFI) we are able to change the voltage and frequency of the processors to save power within a certain performance constraint. In this work we want to maximize potential power savings and minimize time penalty by means of efficient task scheduling in VFIs. A new scheduling algorithm is presented which schedules the tasks onto the processing cores in the VFI by ranking them based on the computation load and communication load among other tasks. The mapping of the tasks is relevant to the processing speed of the cores and the simulation results show improvements compared to the default task scheduler of Linux.