Early evaluation of IBM BlueGene/P

S. Alam, R. Barrett, M. Bast, M.R. Fahey, J. Kuehn, C. McCurdy, J. Rogers, P. Roth, R. Sankaran, J.S. Vetter, P. Worley, W. Yu
2008 2008 SC - International Conference for High Performance Computing, Networking, Storage and Analysis  
BlueGene/P (BG/P) is the second generation BlueGene architecture from IBM, succeeding BlueGene/L (BG/L). BG/P is a system-on-a-chip (SoC) design that uses four PowerPC 450 cores operating at 850 MHz with a double precision, dual pipe floating point unit per core. These chips are connected with multiple interconnection networks including a 3-D torus, a global collective network, and a global barrier network. The design is intended to provide a highly scalable, physically dense system with
more » ... ely low power requirements per flop. In this paper, we report on our examination of BG/P, presented in the context of a set of important scientific applications, and as compared to other major large scale supercomputers in use today. Our investigation confirms that BG/P has good scalability with an expected lower performance per processor when compared to the Cray XT4's Opteron. We also find that BG/P uses very low power per floating point operation for certain kernels, yet it has less of a power advantage when considering science-driven metrics for mission applications.
doi:10.1109/sc.2008.5214725 dblp:conf/sc/AlamBBFKMRRSVWY08 fatcat:4hvg22gxbbdrrfj4mi32zgpp4m