Dynamic Power Management (DPM)
Description:
The Dynamic Power Management (DPM) project explores technologies to improve power conservation capabilities of platforms based on open source software. Of particular interest are techniques applicable to running systems, adjusting power parameters on-the-fly while ensuring realtime deadlines of running software are met.
DPM software exploits recent advances in hardware to scale clocking information (such as CPU and core bus frequencies) and core voltages with low latency. This allows these parameters to be adjusted very frequently in order to realize power savings during brief idle periods or execution of tasks with lower performance and power demands. Our work so far targets the Linux operating system and the characteristics of hardware used for embedded Linux. Ongoing DPM investigations are attuned to the requirements of vendors of consumer electronics devices, such as the members of the Consumer Electronics Linux Forum, and embedded silicon vendors who have requested enhanced power management capabilities for Linux.
