maspack.solvers

Class HybridSolveTiming

java.lang.Object

maspack.solvers.HybridSolveTiming

public class HybridSolveTiming
extends java.lang.Object

Measures the performance of hybrid direct/iterative solves, in which a matrix factored for values V0 is used as a preconditioner for an iterative solve with nearby values V1, as done by DirectSolver.iterativeSolve(double[], double[], double[]). The perturbed values are

   V1[k] = V0[k] (1 + eps r[k])
 

where r[k] is uniformly distributed in [-1,1]. The time of each iterative solve is compared with that of a direct factor and solve.

Test matrices are: slab, an n x n x n/4 hex grid, and slabC, the same with constraints added at a ratio of 0.1.

Usage:

  java maspack.solvers.HybridSolveTiming -out hybrid.csv
     [-solvers Mumps,Pardiso] [-cases slab,slabC] [-symmetric]
     [-res 32,48] [-threads 8] [-eps 1e-4,1e-3,1e-2,1e-1]
     [-tolExp 10] [-maxSolves 100] [-restart 20] [-reps 3]
     [-mumpsMethods GMRES,CGS] [-pardisoMethods CG,CGS,GMRES,HCGS]
     [-criticalArrays] [-noCriticalArrays]
 

Constructor Summary

Constructors

Constructor and Description
HybridSolveTiming()

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] args)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HybridSolveTiming

public HybridSolveTiming()

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException