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172.mgrid
SPEC CPU2000 Benchmark Description File


Benchmark Name

172.mgrid


Benchmark Author

Eric Barszcz, Paul O. Frederickson


Benchmark Program General Category

Multi-grid Solver: 3D Potential Field


Benchmark Description

172.mgrid demonstrates the capabilities of a very simple multigrid solver in computing a three dimensional potential field.

Adapted by SPEC from the NAS Parallel Benchmarks with modifications for portability and a different workload.


Input Description

  1. It solves only a constant coefficient equation, and only on a uniform cubical grid.
  2. It solves only a single equation, representing a scalar field rather than a vector field.

Output Description

In addition to echoing some of the inputs, the main part of the output is from the smoothed approximate inverse. Only a small fraction of the smoothed output is printed, just enough to assure that all work is being done and at to check intermediate results for accuracy. In addition the L2 norm and Inf norms are are used as a checksum of the output.


Programming Language

Fortran 77


Known portability issues

None


Reference

http://www.nas.nasa.gov/Pubs/TechReports/NASreports/NAS-95-020

Last update: 16 August 2000