Hi, I am using a single computer and several processes. I am using KSPGMRES for solving matrices. When I use increase the number of processes I have problems solving the matrix. Is there a more optimized solver for parallel processing?
When I update ghost cells information with VecGhostUpdateBegin/End() do I need to call MPI_Barrier to assure that all ghost information is updated before proceeding or is this already done by the VecGhostUpdateBegin/End()? I have it almost working. Thanks for your help. Billy.
