Hi all, Just a general conceptual question: say I am tinkering around with SNES ex48.c and am running the program with these options:
mpirun -n $NPROCS -pc_type mg -M $XSEED -N $YSEED -P $ZSEED -thi_mat_type baij -da_refine $DAREFINE -pc_mg_levels $MGLEVELS I am not too familiar with mg, but it seems to me there is a very strong correlation between $MGLEVELS and $DAREFINE as well as perhaps even the initial coarse grid size (provided by $X/YZSEED). Is there a rule of thumb on how these parameters should be? I am guessing it probably is also hardware/architectural dependent? Thanks, Justin
