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 > [email protected] > http://www.fenics.org/mailman/listinfo/dolfin-dev _______________________________________________ DOLFIN-dev mailing list [email protected] http://www.fenics.org/mailman/listinfo/dolfin-dev
