Young Geun Kim, Minyong Kim, Jae Min Kim and Sung Woo Chung, “M-DTM: Migration-based Dynamic Thermal Management for Heterogeneous Mobile Multi-core Processors”, Design, Automation and Test in Europe Conference (DATE 2015), Grenoble, France, March 2015.
Recently, mobile devices have employed heterogeneous multi-core
processors which consist of high-performance big cores and low-power
small cores. In heterogeneous mobile multi-core processors, the
conventional DVFS (Dynamic Voltage and Frequency Scaling) -based DTM
(Dynamic Thermal Management) is still adopted; it does not actively
utilize the small cores to resolve thermal problem. In this paper, we
propose M-DTM (Migration-based DTM) for heterogeneous mobile multi-core
processors. In case of thermal emergency of the big cores, M-DTM
migrates applications to the small cores instead of lowering the voltage
and frequency of the big cores. In this way, M-DTM allows more time for
the applications to run at the highest frequency of the big cores by
cooling down the big cores more rapidly, compared to the conventional
DTM. Through real measurement, we show that M-DTM improves performance
by 10.6% and saves system-wide energy (not CPU energy) by 3.6%, on
average, compared to the conventional DTM.