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6.2.6 Summary

The FCT  code was ported to the nCUBE-1 by David W. Walker [Walker:88b]. Gary Montry of Sandia National Laboratories supplied the original code, and made several helpful suggestions. A videotape of the evolution of the Kelvin-Helmholtz instability was produced by Jeff Goldsmith at the Image Processing  Laboratory of the Jet Propulsion Laboratory.

Figure 6.3: Overhead, f, as a Function of , Where n Is the Number of Grid Points per Processor. Results are shown for nCUBE-1 hypercubes of dimension one to nine. The overhead for the 2-processor case (open circles) lies below that for the higher dimensional hypercubes. This is because the processors only communicate in one direction in the 2-processor case, whereas for hypercubes of dimension greater than one, communication is necessary in both the x and y directions.

Guy Robinson
Wed Mar 1 10:19:35 EST 1995