The performance realities of massively parallel processors: a case study
- 2 January 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
The authors present the results of an architectural comparison of SIMD (single-instruction multiple-data) massive parallelism, as implemented in the Thinking Machines Corp. CM-2, and vector or concurrent-vector processing, as implemented in the Cray Research Inc., Y-MP/8. The comparison is based primarily upon three application codes taken from the LANL (Los Alamos National Laboratory) CM-2 workload. Tests were run by porting CM Fortran codes to the Y-MP, so that nearly the same level of optimization was obtained on both machines. The results for fully configured systems, using measured data rather than scaled data from smaller configurations, show that the Y-MP/8 is faster than the 64 k CM-2 for all three codes. A simple model that accounts for the relative characteristic computational speeds of the two machines, and reduction in overall CM-2 performance due to communication or SIMD conditional execution, accurately predicts the performance of two of the three codes. The authors show the similarity of the CM-2 and Y-MP programming models and comment on selected future massively parallel processor designs.Keywords
This publication has 11 references indexed in Scilit:
- The free-Lagrange method on the connection machinePublished by Springer Nature ,2008
- QCD on the connection machine: beyond LISPComputer Physics Communications, 1991
- Ocean modeling on the connection machinePublished by Association for Computing Machinery (ACM) ,1991
- Parallel approaches to short range molecular dynamics simulationsPublished by Association for Computing Machinery (ACM) ,1991
- Computing turbulent flow in complex geometries on a massively parallel processorPublished by Association for Computing Machinery (ACM) ,1991
- Fortran at ten gigaflopsPublished by Association for Computing Machinery (ACM) ,1991
- Highly Parallel ComputationScience, 1990
- QCD with dynamical fermions on the connection machineNuclear Physics B - Proceedings Supplements, 1990
- Computational Physics on the Connection MachineComputers in Physics, 1990
- Vectorization on Monte Carlo particle transport: an architectural study using the LANL benchmark “GAMTEB”Published by Association for Computing Machinery (ACM) ,1989