Showing papers on "FLOPS published in 1987"

Multitasking the conjugate gradient method on the CRAY X-MP/48

Abstract: We show how to efficiently implement the preconditioned conjugate gradient method on a four processors computer CRAY X-MP/48. We solve block tridiagonal systems using block preconditioners well suited to parallel computation. Numerical results are presented that exhibit nearly optimal speedup and high Mflops rates.

Architecture and performance of NEC supercomputer SX system

Abstract: The NEC supercomputer SX system is a high-speed, large-scale supercomputer designed for scientific and engineering computations. It features 16 vector pipelines with a vector peak speed of 1.3 Gflops, a simplified scalar design with a control and arithmetic processor, and 256 Mbytes of main memory with 512 banks. To achieve the ease-of-use, the standard vectorizing FORTRAN, various performance tuning tools and the operating system with various features are supported.

A benchmark of the SCS-40 computer: A mini supercomputer compatible with the Cray X-MP/24

Abstract: An accurate benchmark of the SCS-40 mini supercomputer manufactured by Scientific Computer Systems Corporation has been carried out. A new, revised set of standard ANSI77 Fortran benchmark codes were run on the SCS-40 in a dedicated environment, using Version 1.13 of the CFT compiler. The results are compared with those obtained on one processor of a CRAY X-MP/24 computer using the Cray Research Inc. version of the same compiler. The results suggest that for a typical Los Alamos National Laboratory computational workload, the SCS-40 is equivalent to one-quarter to one-third of a single processor of the CRAY X-MP/24. 15 refs., 5 tabs.