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Poisson example is broken #24

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tkphd opened this issue Feb 26, 2016 · 0 comments

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bug

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tkphd commented Feb 26, 2016 •

edited

With np>1, the multigrid algorithm hangs. Implementation decisions suggest that parallel was not intended:
- Ghostswap is never called, and
- stock Gauss-Seidel iterative scheme is used where red-black Gauss-Seidel is more appropriate.
- The multigrid algorithm may not be parallelizable.
Serial code alternates between (-\infty, 0] and [0, +\infty) every timestep, with zeros along the border. This not the desired result.

tkphd changed the title ~~Parallel Poisson example hangs~~ Poisson example is broken

tkphd added the bug label

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