Step 2 -- Performance Evaluation
The evaluation parameter is the criterion you will use to evaluate
different solvers. You can select a linear combination of the following:
- the CPU time required to build the preconditioner;
- the CPU time required to solve the linear system;
- the iterations to converge;
- the condition number of the preconditioned system.
This latter option requires either CG with condnum or GMRES
with condnum.