source: issm/trunk-jpl/src/c/toolkits/petsc/patches/NewMat.cpp@ 11695

Last change on this file since 11695 was 11695, checked in by Eric.Larour, 14 years ago

Completed separation of Petsc from ISSM. Matrix and Vector
are now the vehicles for Mat and Vec objects when running with
Petsc, or double* when running with a custom made type of matrix (still
to be finished).

File size: 2.6 KB
Line 
1/*!\file: NewMat.cpp
2 * \brief create matrix using the Petsc library
3 */
4
5#ifdef HAVE_CONFIG_H
6 #include <config.h>
7#else
8#error "Cannot compile with HAVE_CONFIG_H symbol! run configure first!"
9#endif
10
11/*Petsc includes: */
12#include "petscmat.h"
13#include "petscvec.h"
14#include "petscksp.h"
15
16#include "./petscpatches.h"
17
18#include "../../../shared/shared.h"
19#include "../../../include/include.h"
20#include "../../mpi/patches/mpipatches.h"
21
22/*NewMat(int M,int N){{{1*/
23Mat NewMat(int M,int N){
24
25 /*output:*/
26 Mat outmatrix=NULL;
27
28 /*parameters: */
29 double sparsity=.001; //default
30 int m,n;
31 int d_nz,o_nz,nnz;
32
33 /*Determine local sizes: */
34 m=DetermineLocalSize(M);
35 n=DetermineLocalSize(N);
36
37 nnz=(int)((double)M*(double)N*sparsity); //number of non zeros.
38 d_nz=(int)((double)nnz/(double)M/2.0); //number of non zeros per row/2
39 o_nz=(int)((double)nnz/(double)M/2.0); //number of non zeros per row/2
40
41 MatCreateMPIAIJ(MPI_COMM_WORLD,m,n,M,N,d_nz,NULL,o_nz,NULL,&outmatrix);
42
43 return outmatrix;
44}
45/*}}}*/
46/*NewMat(int M,int N,double sparsity){{{1*/
47Mat NewMat(int M,int N,double sparsity){
48
49 /*output:*/
50 Mat outmatrix=NULL;
51
52 /*parameters: */
53 int m,n;
54 int d_nz,o_nz;
55 int nnz;
56
57 /*Determine local sizes: */
58 m=DetermineLocalSize(M);
59 n=DetermineLocalSize(N);
60
61 nnz=(int)((double)M*(double)N*sparsity); //number of non zeros.
62 d_nz=(int)((double)nnz/(double)M/2.0); //number of non zeros per row/2
63 o_nz=(int)((double)nnz/(double)M/2.0); //number of non zeros per row/2
64
65 MatCreateMPIAIJ(MPI_COMM_WORLD,m,n,M,N,d_nz,NULL,o_nz,NULL,&outmatrix);
66
67 return outmatrix;
68}
69/*}}}*/
70/*NewMat(int M,int N,int connectivity,int numberofdofspernode){{{1*/
71Mat NewMat(int M,int N,int connectivity,int numberofdofspernode){
72
73 /*output:*/
74 Mat outmatrix=NULL;
75
76 /*parameters: */
77 int m,n;
78 int d_nz,o_nz;
79 int nnz;
80
81 #if _PETSC_MAJOR_ >= 3
82 const MatType type;
83 #else
84 MatType type;
85 #endif
86
87 /*Determine local sizes: */
88 m=DetermineLocalSize(M);
89 n=DetermineLocalSize(N);
90
91 /*Figure out number of non zeros per row: */
92 d_nz=(int)connectivity*numberofdofspernode/2;
93 o_nz=(int)connectivity*numberofdofspernode/2;
94
95 MatCreate(MPI_COMM_WORLD,&outmatrix);
96 MatSetSizes(outmatrix,m,n,M,N);
97 MatSetFromOptions(outmatrix);
98
99 /*preallocation according to type: */
100 MatGetType(outmatrix,&type);
101
102 #if _PETSC_MAJOR_ == 2
103 if((strcmp(type,"mpiaij")==0) || (strcmp(type,"aijmumps")==0)){
104 MatMPIAIJSetPreallocation(outmatrix,d_nz,NULL,o_nz,NULL);
105 }
106 #else
107 if((strcmp(type,"mpiaij")==0) || (strcmp(type,"mpidense")==0)){
108 MatMPIAIJSetPreallocation(outmatrix,d_nz,NULL,o_nz,NULL);
109 }
110 #endif
111
112 return outmatrix;
113}
114/*}}}*/
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