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Anders Logg wrote:
Johan and I have set up a benchmark for parallel speedup in bench/fem/speedup Here are some preliminary results: Speedup | Assemble Assemble + solve -------------------------------------- 1 | 1 1 2 | 1.4351 4.0785 4 | 2.3763 6.9076 8 | 3.7458 9.4648 16 | 6.3143 19.369 32 | 7.6207 33.699 These numbers look a bit strange, especially the superlinear speedup for assemble + solve. There might be a bug somewhere in the benchmark code.
I've have seen something like this before for the solver. You might be close to using all the memory for the LU solve on one process.
Also, are you using MUMPS or UMFPACK for the one process case? Garth
Anyway, we have some preliminary results that at least show some kind of speedup. It would be interesting to hear some comments on what kind of numbers we should expect to get from Matt and others. The benchmark is for assembling and solving Poisson on a 64 x 64 x 64 mesh using PETSc/MUMPS. Partitioning time is not included in the numbers. -- Anders ------------------------------------------------------------------------ _______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@xxxxxxxxxx http://www.fenics.org/mailman/listinfo/dolfin-dev
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