Power-aware predictive models of hybrid (MPI/OpenMP) scientific applications on multicore systems
Computer Science - Research and Development
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Green computing, an emerging field of research that seeks to reduce excess power consumption in high-performance computing, is gaining popularity among researchers. Research in this field often relies on simulation or only uses a small cluster, typically 8 or 16 nodes, because of the lack of hardware support. In contrast, System G at Virginia Tech is a 2592 processor supercomputer equipped with power-aware components suitable for large-scale green computing research. DIRECT is a deterministic global optimisation algorithm, implemented in the mathematical software package VTDIRECT95. This paper explores the potential energy savings for the parallel implementation of DIRECT, called pVTdirect, when used with a large-scale computational biology application, parameter estimation for a budding yeast cell cycle model, on System G. Two power-aware approaches for pVTdirect are developed and compared against the CPUSPEED power saving system tool. The results show that knowledge of the parallel workload of the underlying application is beneficial for power management.