> It is not. The number of processes is specified independently using > 'mpiexec -n <p>' or when using the test system NP=<p>. > >> (i) Say I start with -cells 1,1,1 -max_conv its 7; that would >> eventually leave all refinement on level 7 running on 1 MPI process? >> > I don't understand
> (ii) Say I start with -cells 2,2,1 -max_conv its n; is it recommended >> to run on 4 MPI processes? >> > Yes! > No, those options do not influence the number of processes. > Correct, but you are not answering the question that he asked! The coupling of the two is not enforced in the code, but to get good load balancing you want i*j*k == NP. (there is more flexibility than this, but this is the place to start.) > > >> I am running ex56 on gpu; I am looking at KSPSolve (or any other event) >> but no gpu flops are recorded in the -log_view? >> > > I do not think you are running on the GPU then. Mark can comment, but we > usually specify GPU execution using the Vec and Mat types > through -dm_vec_type and -dm_mat_type. > This test has a ex56_ prefix. Mark
