Actual source code: ex55.c
petsc-3.3-p6 2013-02-11
2: static char help[] = "Tests converting a matrix to another format with MatConvert().\n\n";
4: #include <petscmat.h>
5: /* Usage: mpiexec -n <np> ex55 -verbose <0 or 1> */
9: int main(int argc,char **args)
10: {
11: Mat C,A,B,D;
13: PetscInt i,j,ntypes,bs,mbs,m,block,d_nz=6, o_nz=3,col[3],row,verbose=0;
14: PetscMPIInt size,rank;
15: const MatType type[9];
16: char file[PETSC_MAX_PATH_LEN];
17: PetscViewer fd;
18: PetscBool equal,flg_loadmat,flg;
19: PetscScalar value[3];
21: PetscInitialize(&argc,&args,(char *)0,help);
22: PetscOptionsGetInt(PETSC_NULL,"-verbose",&verbose,PETSC_NULL);
23: PetscOptionsGetString(PETSC_NULL,"-f",file,PETSC_MAX_PATH_LEN,&flg_loadmat);
24: MPI_Comm_size(PETSC_COMM_WORLD,&size);
25: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
27: PetscOptionsHasName(PETSC_NULL,"-testseqaij",&flg);
28: if (flg){
29: if (size == 1){
30: type[0] = MATSEQAIJ;
31: } else {
32: type[0] = MATMPIAIJ;
33: }
34: } else {
35: type[0] = MATAIJ;
36: }
37: if (size == 1){
38: ntypes = 3;
39: type[1] = MATSEQBAIJ;
40: type[2] = MATSEQSBAIJ;
41: } else {
42: ntypes = 3;
43: type[1] = MATMPIBAIJ;
44: type[2] = MATMPISBAIJ;
45: }
47: /* input matrix C */
48: if (flg_loadmat){
49: /* Open binary file. */
50: PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd);
52: /* Load a baij matrix, then destroy the viewer. */
53: MatCreate(PETSC_COMM_WORLD,&C);
54: if (size == 1){
55: MatSetType(C,MATSEQBAIJ);
56: } else {
57: MatSetType(C,MATMPIBAIJ);
58: }
59: MatLoad(C,fd);
60: PetscViewerDestroy(&fd);
61: } else { /* Create a baij mat with bs>1 */
62: bs = 2; mbs=8;
63: PetscOptionsGetInt(PETSC_NULL,"-mbs",&mbs,PETSC_NULL);
64: PetscOptionsGetInt(PETSC_NULL,"-bs",&bs,PETSC_NULL);
65: if (bs <= 1) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONG," bs must be >1 in this case");
66: m = mbs*bs;
67: MatCreateBAIJ(PETSC_COMM_WORLD,bs,PETSC_DECIDE,PETSC_DECIDE,m,m,d_nz,PETSC_NULL,o_nz,PETSC_NULL,&C);
68: for (block=0; block<mbs; block++){
69: /* diagonal blocks */
70: value[0] = -1.0; value[1] = 4.0; value[2] = -1.0;
71: for (i=1+block*bs; i<bs-1+block*bs; i++) {
72: col[0] = i-1; col[1] = i; col[2] = i+1;
73: MatSetValues(C,1,&i,3,col,value,INSERT_VALUES);
74: }
75: i = bs - 1+block*bs; col[0] = bs - 2+block*bs; col[1] = bs - 1+block*bs;
76: value[0]=-1.0; value[1]=4.0;
77: MatSetValues(C,1,&i,2,col,value,INSERT_VALUES);
79: i = 0+block*bs; col[0] = 0+block*bs; col[1] = 1+block*bs;
80: value[0]=4.0; value[1] = -1.0;
81: MatSetValues(C,1,&i,2,col,value,INSERT_VALUES);
82: }
83: /* off-diagonal blocks */
84: value[0]=-1.0;
85: for (i=0; i<(mbs-1)*bs; i++){
86: col[0]=i+bs;
87: MatSetValues(C,1,&i,1,col,value,INSERT_VALUES);
88: col[0]=i; row=i+bs;
89: MatSetValues(C,1,&row,1,col,value,INSERT_VALUES);
90: }
91: MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);
92: MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);
93: }
95: {
96: /* Check the symmetry of C because it will be converted to a sbaij matrix */
97: Mat Ctrans;
98: MatTranspose(C, MAT_INITIAL_MATRIX,&Ctrans);
99: MatEqual(C, Ctrans, &flg);
100: if (flg) {
101: MatSetOption(C,MAT_SYMMETRIC,PETSC_TRUE);
102: } else {
103: SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"C must be symmetric for this example");
104: }
105: MatDestroy(&Ctrans);
106: }
107: //MatView(C,PETSC_VIEWER_STDOUT_WORLD);
108:
109: /* convert C to other formats */
110: for (i=0; i<ntypes; i++) {
111: MatConvert(C,type[i],MAT_INITIAL_MATRIX,&A);
112: MatMultEqual(A,C,10,&equal);
113: if (!equal) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"Error in conversion from BAIJ to %s",type[i]);
114: for (j=i+1; j<ntypes; j++) {
115: if (verbose>0) {
116: PetscPrintf(PETSC_COMM_WORLD," \n[%d] test conversion between %s and %s\n",rank,type[i],type[j]);
117: }
118:
119: if (!rank && verbose) printf("Convert %s A to %s B\n",type[i],type[j]);
120: MatConvert(A,type[j],MAT_INITIAL_MATRIX,&B);
121: /*
122: if (j == 2){
123: PetscPrintf(PETSC_COMM_SELF," A: %s\n",type[i]);
124: MatView(A,PETSC_VIEWER_STDOUT_WORLD);
125: PetscPrintf(PETSC_COMM_SELF," B: %s\n",type[j]);
126: MatView(B,PETSC_VIEWER_STDOUT_WORLD);
127: }
128: */
129: MatMultEqual(A,B,10,&equal);
130: if (!equal) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"Error in conversion from %s to %s",type[i],type[j]);
132: if (size == 1 || j != 2){ /* Matconvert from mpisbaij mat to other formats are not supported */
133: if (!rank && verbose) printf("Convert %s B to %s D\n",type[j],type[i]);
134: MatConvert(B,type[i],MAT_INITIAL_MATRIX,&D);
135: MatMultEqual(B,D,10,&equal);
136: if (!equal) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"Error in conversion from %s to %s",type[j],type[i]);
138: MatDestroy(&D);
139: }
140: MatDestroy(&B);
141: MatDestroy(&D);
142: }
144: /* Test in-place convert */
145: if (size == 1){ /* size > 1 is not working yet! */
146: j = (i+1)%ntypes;
147: /* printf("[%d] i: %d, j: %d\n",rank,i,j); */
148: MatConvert(A,type[j],MAT_REUSE_MATRIX,&A);
149: }
151: MatDestroy(&A);
152: }
153: MatDestroy(&C);
155: PetscFinalize();
156: return 0;
157: }