zpivot_batch.c File Reference

#include "superlu_zdefs.h"

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Functions
int	zpivot_batch (superlu_dist_options_t *options, int batchCount, int m, int n, handle_t *SparseMatrix_handles, double **ReqPtr, double **CeqPtr, DiagScale_t *DiagScale, int **RpivPtr)
	Compute row pivotings for each matrix, for numerical stability. More...

Detailed Description

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.

Function Documentation

zpivot_batch()

int zpivot_batch	(	superlu_dist_options_t *	options,
		int	batchCount,
		int	m,
		int	n,
		handle_t *	SparseMatrix_handles,
		double **	ReqPtr,
		double **	CeqPtr,
		DiagScale_t *	DiagScale,
		int **	RpivPtr
	)

Compute row pivotings for each matrix, for numerical stability.

Parameters

  

    
[in]
options
solver options

    
[in]
batchCount
number of matrices in the batch

    
[in]
m
row dimension of the matrices

    
[in]
n
column dimension of the matrices

    
[in,out]
SparseMatrix_handles
pointers to the matrices in the batch, each pointing to the actual stoage in CSC format
    On entry, the original matrices, may be overwritten by A1 <- diag(R)*A*diag(C) from dequil_batch()
    On exit, each matrix may be A2 <- Pr*A1

    
[in,out]
ReqPtr
pointers to row scaling vectors, maybe overwritten by scaling from MC64

    
[in,out]
CeqPtr
pointers to column scaling vectors, maybe overwritten by scaling from MC64

    
[in,out]
DiagScale
array indicating how each system is equilibrated: {ROW, COL, BOTH}

    
[in,out]
RpivPtr
pointers to row permutation vectors for each matrix, each of size m
    On exit, each RpivPtr[] is applied to each matrix

Return value:
    0,  success
    -1, invalid RowPerm option; an Identity perm_r[] is returned
    d, indicates that the d-th matrix is the first one in the batch encountering error


  
  

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