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HPCG 2.1 Reference code
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2014-01-31
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CG Benchmark Release 2.1
HPCG 2.0/2.1 provides the first implementation of a multigrid preconditioner for the conjugate gradient method.
- HPCG 2.0/2.1replaces the additive Schwarz preconditioner with a synthetic multigrid approach.
- The number of coarse grid levels is parametrized but fixed for production benchmark runs (presently set to 3 levels of coarsening).
- We use injection as the grid transfer operator and symmetric Gauss-Seidel as the pre and post smoother.
- All kernels from HPCG 1.1 remain important and no new kernels were added.
- The biggest impact of the multigrid preconditioner is that all computation and communication kernels will execute on a nested sequence of coarse grids where each grid level is 8 times smaller than the previous level.
- Every attempt was made to assure that the kernels are not unnecessarily different between HPCG 1.1 and HPCG 2.0.
- Even so, some changes were necessary to supported the nested hierarchy.
- We did not implement a true multigrid preconditioner. In particular, we do not have a "bottom" solver for the coarsest grid.
- We also added a Vector struct to facility easier implementation of kernels on discrete devices such as GPUs.
SHA256 655ec1b282d1cae1903d22db73c12ab9979045d2ced72d6cc8b1802a4ff546ff |
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HPCG 2.0 Reference code
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2014-01-29
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SHA256 956261d94504f659aeca4cfe4c811ac33e58aba2ef578cffe9917c416a7a8259 |
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HPCG 1.1 Reference code
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2013-11-26
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This is the first update release of HPCG. See HISTORY file for more detailed list of changes.
SHA256 ddef264576ed68ac9bf643ad716e133b4e371cd63a4972198aaedb3976243134 |
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HPCG 1.0 Reference code
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2013-11-19
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This is the first official release of HPCG for general public access.
SHA256 11b1cc479c38588604c494801d8155e57630493e8105440d5b37f5e99bf9b30a |
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HPCG 0.5 Reference code
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2013-10-25
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SHA256 876718c50d5791efa2fbec5734eee5c93f1b4d898cc93ab3aecbc025266b9598 |
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License
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