psdrive3.c File Reference

Driver program for PSGSSVX example. More...

#include <math.h>
#include "superlu_sdefs.h"

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Functions
int	main (int argc, char *argv[])
int	cpp_defs ()

Detailed Description

Driver program for PSGSSVX example.

Copyright (c) 2003, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from U.S. Dept. of Energy)

All rights reserved.

The source code is distributed under BSD license, see the file License.txt at the top-level directory.

-- Distributed SuperLU routine (version 6.1) --
Lawrence Berkeley National Lab, Univ. of California Berkeley.
March 15, 2003
April 5, 2015

Function Documentation

cpp_defs()

int cpp_defs

(

)

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main()

int main	(	int	argc,
		char *	argv[]
	)

Purpose
=======

The driver program PSDRIVE3.

This example illustrates how to use PSGSSVX to solve
systems repeatedly with the same sparsity pattern and similar
numerical values of matrix A.
In this case, the row and column permutation vectors and symbolic
factorization are computed only once. The following data structures
will be reused in the subsequent call to PSGSSVX:
       ScalePermstruct : DiagScale, R, C, perm_r, perm_c
       LUstruct        : etree, Glu_persist, Llu

NOTE:
The distributed nonzero structures of L and U remain the same,
although the numerical values are different. So 'Llu' is set up once
in the first call to PSGSSVX, and reused in the subsequent call.

With MPICH,  program may be run by typing:
   mpiexec -n <np> psdrive3 -r <proc rows> -c <proc columns> big.rua

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