European Design and Automation Association
Dynamic Frequency and Voltage Scaling (DVFS) techniques have been widely used for meeting energy constraints. Single-chip many-core systems bring new challenges owing to the large number of operating points and the shift to Message Passing Interface (MPI) from shared memory communication. DVFS, however, has been mostly studied on single-chip systems with one or few cores, without considering the impact of the communication among cores. This paper evaluates the impact of frequency scaling on the performance and power of many-core systems with MPI. The authors conduct experiments on the Single-chip Cloud Computer (SCC), an experimental many-core processor developed by Intel.