On Mon, Sep 21, 2009 at 09:02:04PM +0100, Garth N. Wells wrote: > > > 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. > > > > 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. > > Something else - does the assembly timing include computation of the DofMap?
No, that happens before at the creation of the FunctionSpace. This is just the call to assemble. -- Anders
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