Power-aware load balancing of large scale MPI applications

Power consumption is a very important issue for HPC community, both at the level of one application or at the level of whole workload. Load imbalance of a MPI application can be exploited to save CPU energy without penalizing the execution time. An application is load imbalanced when some nodes are assigned more computation than others. The nodes with less computation can be run at lower frequency since otherwise they have to wait for the nodes with more computation blocked in MPI calls. A technique that can be used to reduce the speed is Dynamic Voltage Frequency Scaling (DVFS). Dynamic power dissipation is proportional to the product of the frequency and the square of the supply voltage, while static power is proportional to the supply voltage. Thus decreasing voltage and/or frequency results in power reduction. Furthermore, over-clocking can be applied in some CPUs to reduce overall execution time. This paper investigates the impact of using different gear sets , over-clocking, and...

• Type: Conference
• Year: 2009
• Where: IPPS
• Authors: Maja Etinski, Julita Corbalán, Jesús Labarta, Mateo Valero, Alexander V. Veidenbaum
• Keywords: CPU Energy, Distributed And Parallel Computing, Execution Time, IPPS 2009, Load Imbalance