Michele Rosso <[email protected]> writes: > Hi, > > I confirm that > > -pc_type gamg -pc_mg_cycle_type v -pc_gamg_agg_nsmooths 1 > > produces the correct shift in PETSc 3.4. > So my problem is solved. I will upgrade to 3.4 in my productive > machine installation. > It is a Cray machine (Blue Waters). Assuming I want to use the Cray > compiler, which options should I use for ./configure > for the installation.
Or the Intel compiler or GCC. PETSc should run at similar speed with any. IIRC, Cray recommends the Intel compiler on their machines with Intel CPUs. There are examples in config/examples/.
