You are at Step 2: Select Data, in

This is the step where the Krylov solver and the preconditioners are specified. We select the following:

  1. conjugate gradient with condition number estimate (CG with condnum);
  2. set the tolerance to 1e-9;
  3. enable multilevel preconditioners by clicking on the Yes button of the Analyze Multilevel Preconditioners option;
  4. define condition number as evaluation parameter;
  5. Scroll down the page, and in the options for multilevel preconditioners specify a smoother for the preconditioner, for example an incomplete Cholesky (IC) for level 1 and 2. You can skip this step if you want.

To continue, proceed to Step 3 (Compute Data) using the button at the bottom of the page. Note that if you don't enable any preconditioners, Step 3 will be an empty box.

In this step, you should specify what linear solution techniques you want to analyze.

You also have to specify how to evaluate the solution phase. The evaluation parameter, called phi, is defined as a linear combination of CPU time, iterations and estimated condition number. The weights are defined in the "Performance Evaluation" section of this page.

To continue, proceed to Step 3 (Compute Data) using the button at the bottom of the page. Note that if you don't specify any preconditioners, Step 3 will be an empty box.

General Settings

Number of processors:
Solver:
Maximum iterations:
Tolerance:
Krylov output:
Size of Krylov space (for GMRES only):
Solution:
Starting Solution:
Right-hand size:
phi is the evaluation parameter?

Analyze Chebyshev Preconditioners: Yes     No
Analyze Jacobi Preconditioners: Yes     No
Analyze Gauss-Seidel Preconditioners: Yes     No
Analyze symmetric Gauss-Seidel Preconditioners: Yes     No
Analyze IC Preconditioners: Yes     No
Analyze ICT Preconditioners: Yes     No
Analyze ILU Preconditioners: Yes     No
Analyze ILUT Preconditioners: Yes     No
Analyze Multilevel Preconditioners: Yes     No

Note: at least one preconditioner has to be analyzed (enabled)

Chebyshev Preconditioners: ?


Relaxation Preconditioners (Jacobi, Gauss-Seidel, SGS) ?


Incomplete Factorization Preconditioners (IC, ICT, ILU, ILUT) ?


Multilevel Preconditioners ?

= 3", "aggregation: type (level 3)", "s"); ?> =3", "smoother: type (level 3)", "s"); ?>
 
 
 
 
 


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