On Mon, 18 Jan 2010 07:58:46 -0600, Matthew Knepley <knepley at gmail.com> wrote: > Okay, I just tried it and I understand the problem: This never really > worked. RASM was not doing the proper thing.
So what happens in release-3.0.0? Are you saying that what it was doing for multiple subdomains per process was some other Schwarz variant, but not RASM? That might explain this: $ mpirun -n 7 ./ex2 -pc_type asm -pc_asm_blocks 7 Norm of error 0.000458307 iterations 7 $ mpirun -n 1 ./ex2 -pc_type asm -pc_asm_blocks 7 Norm of error 0.000290453 iterations 11 Is there an argument against (optionally) solving the subdomains multiplicatively within each process? > Now it does, but we need to correct the code to produce is_local > automatically with this argument. Great. Jed
