The Numerical Wind Tunnel (NWT) computer system of the National Aerospace Laboratory (NAL) comprises two system administrators, 140 processing elements and a crossbar network, which operates as a distributed-memory message-passing Multiple-Instruction Multiple-Data (MIMD) computer. Each processing element itself is a vector computer. This paper presents measurements of the elementary characteristic parameters of the NWT with Single Instruction Multiple-Data (SIMD) computing and with MIMD computing in the local and global memory access, and measurements of the maximum actual performance obtained when programs are executed for computation of the incompressible viscous flow in two- and three-dimensional lid-driven cavities in parallel on the 128-processing element system.
Elementary benchmarks of the NWT computer system and program performance
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