Dynamic Thermal Management through Task Scheduling

The evolution of microprocessors has been hindered by their increasing power consumption and the heat generation speed on-die. High temperature impairs the processor’s reliability and reduces its lifetime. While hardware level dynamic thermal management (DTM) techniques, such as voltage and frequency scaling, can effectively lower the chip temperature when it surpasses the thermal threshold, they inevitably come at the cost of performance degradation. We propose an OS level technique that performs thermalaware job scheduling to reduce the number of thermal trespasses. Our scheduler reduces the amount of hardware DTMs and achieves higher performance while keeping the temperature low. Our methods leverage the natural discrepancies in thermal behavior among different workloads, and schedule them to keep the chip temperature below a given budget. We develop a heuristic algorithm based on the observation that there is a difference in the resulting temperature when a hot and a cool job ar...

• Type: Conference
• Year: 2008
• Where: ISPASS
• Authors: Jun Yang 0002, Xiuyi Zhou, Marek Chrobak, Youtao Zhang, Lingling Jin
• Keywords: Chip Temperature, Dynamic Thermal Management, ISPASS 2008, Software Engineering, Thermal