Actual source code: ex51.c


  2: static char help[] = "Tests MatIncreaseOverlap(), MatCreateSubMatrices() for MatBAIJ format.\n";

  4: #include <petscmat.h>

  6: int main(int argc,char **args)
  7: {
  8:   Mat            A,B,*submatA,*submatB;
  9:   PetscInt       bs=1,m=43,ov=1,i,j,k,*rows,*cols,M,nd=5,*idx,mm,nn,lsize;
 10:   PetscScalar    *vals,rval;
 11:   IS             *is1,*is2;
 12:   PetscRandom    rdm;
 13:   Vec            xx,s1,s2;
 14:   PetscReal      s1norm,s2norm,rnorm,tol = PETSC_SQRT_MACHINE_EPSILON;
 15:   PetscBool      flg;

 17:   PetscInitialize(&argc,&args,(char*)0,help);
 18:   PetscOptionsGetInt(NULL,NULL,"-mat_block_size",&bs,NULL);
 19:   PetscOptionsGetInt(NULL,NULL,"-mat_size",&m,NULL);
 20:   PetscOptionsGetInt(NULL,NULL,"-ov",&ov,NULL);
 21:   PetscOptionsGetInt(NULL,NULL,"-nd",&nd,NULL);
 22:   M    = m*bs;

 24:   MatCreateSeqBAIJ(PETSC_COMM_SELF,bs,M,M,1,NULL,&A);
 25:   MatSetOption(A,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);
 26:   MatCreateSeqAIJ(PETSC_COMM_SELF,M,M,15,NULL,&B);
 27:   MatSetOption(B,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);
 28:   PetscRandomCreate(PETSC_COMM_SELF,&rdm);
 29:   PetscRandomSetFromOptions(rdm);

 31:   PetscMalloc1(bs,&rows);
 32:   PetscMalloc1(bs,&cols);
 33:   PetscMalloc1(bs*bs,&vals);
 34:   PetscMalloc1(M,&idx);

 36:   /* Now set blocks of values */
 37:   for (i=0; i<20*bs; i++) {
 38:     PetscRandomGetValue(rdm,&rval);
 39:     cols[0] = bs*(int)(PetscRealPart(rval)*m);
 40:     PetscRandomGetValue(rdm,&rval);
 41:     rows[0] = bs*(int)(PetscRealPart(rval)*m);
 42:     for (j=1; j<bs; j++) {
 43:       rows[j] = rows[j-1]+1;
 44:       cols[j] = cols[j-1]+1;
 45:     }

 47:     for (j=0; j<bs*bs; j++) {
 48:       PetscRandomGetValue(rdm,&rval);
 49:       vals[j] = rval;
 50:     }
 51:     MatSetValues(A,bs,rows,bs,cols,vals,ADD_VALUES);
 52:     MatSetValues(B,bs,rows,bs,cols,vals,ADD_VALUES);
 53:   }

 55:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 56:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
 57:   MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
 58:   MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);

 60:   /* Test MatIncreaseOverlap() */
 61:   PetscMalloc1(nd,&is1);
 62:   PetscMalloc1(nd,&is2);

 64:   for (i=0; i<nd; i++) {
 65:     PetscRandomGetValue(rdm,&rval);
 66:     lsize = (int)(PetscRealPart(rval)*m);
 67:     for (j=0; j<lsize; j++) {
 68:       PetscRandomGetValue(rdm,&rval);
 69:       idx[j*bs] = bs*(int)(PetscRealPart(rval)*m);
 70:       for (k=1; k<bs; k++) idx[j*bs+k] = idx[j*bs]+k;
 71:     }
 72:     ISCreateGeneral(PETSC_COMM_SELF,lsize*bs,idx,PETSC_COPY_VALUES,is1+i);
 73:     ISCreateGeneral(PETSC_COMM_SELF,lsize*bs,idx,PETSC_COPY_VALUES,is2+i);
 74:   }
 75:   MatIncreaseOverlap(A,nd,is1,ov);
 76:   MatIncreaseOverlap(B,nd,is2,ov);

 78:   for (i=0; i<nd; ++i) {
 79:     ISEqual(is1[i],is2[i],&flg);
 81:   }

 83:   for (i=0; i<nd; ++i) {
 84:     ISSort(is1[i]);
 85:     ISSort(is2[i]);
 86:   }

 88:   MatCreateSubMatrices(A,nd,is1,is1,MAT_INITIAL_MATRIX,&submatA);
 89:   MatCreateSubMatrices(B,nd,is2,is2,MAT_INITIAL_MATRIX,&submatB);

 91:   /* Test MatMult() */
 92:   for (i=0; i<nd; i++) {
 93:     MatGetSize(submatA[i],&mm,&nn);
 94:     VecCreateSeq(PETSC_COMM_SELF,mm,&xx);
 95:     VecDuplicate(xx,&s1);
 96:     VecDuplicate(xx,&s2);
 97:     for (j=0; j<3; j++) {
 98:       VecSetRandom(xx,rdm);
 99:       MatMult(submatA[i],xx,s1);
100:       MatMult(submatB[i],xx,s2);
101:       VecNorm(s1,NORM_2,&s1norm);
102:       VecNorm(s2,NORM_2,&s2norm);
103:       rnorm = s2norm-s1norm;
104:       if (rnorm<-tol || rnorm>tol) {
105:         PetscPrintf(PETSC_COMM_SELF,"Error:MatMult - Norm1=%16.14e Norm2=%16.14e\n",(double)s1norm,(double)s2norm);
106:       }
107:     }
108:     VecDestroy(&xx);
109:     VecDestroy(&s1);
110:     VecDestroy(&s2);
111:   }
112:   /* Now test MatCreateSubmatrices with MAT_REUSE_MATRIX option */
113:   MatCreateSubMatrices(A,nd,is1,is1,MAT_REUSE_MATRIX,&submatA);
114:   MatCreateSubMatrices(B,nd,is2,is2,MAT_REUSE_MATRIX,&submatB);

116:   /* Test MatMult() */
117:   for (i=0; i<nd; i++) {
118:     MatGetSize(submatA[i],&mm,&nn);
119:     VecCreateSeq(PETSC_COMM_SELF,mm,&xx);
120:     VecDuplicate(xx,&s1);
121:     VecDuplicate(xx,&s2);
122:     for (j=0; j<3; j++) {
123:       VecSetRandom(xx,rdm);
124:       MatMult(submatA[i],xx,s1);
125:       MatMult(submatB[i],xx,s2);
126:       VecNorm(s1,NORM_2,&s1norm);
127:       VecNorm(s2,NORM_2,&s2norm);
128:       rnorm = s2norm-s1norm;
129:       if (rnorm<-tol || rnorm>tol) {
130:         PetscPrintf(PETSC_COMM_SELF,"Error:MatMult - Norm1=%16.14e Norm2=%16.14e\n",(double)s1norm,(double)s2norm);
131:       }
132:     }
133:     VecDestroy(&xx);
134:     VecDestroy(&s1);
135:     VecDestroy(&s2);
136:   }

138:   /* Free allocated memory */
139:   for (i=0; i<nd; ++i) {
140:     ISDestroy(&is1[i]);
141:     ISDestroy(&is2[i]);
142:   }
143:   MatDestroySubMatrices(nd,&submatA);
144:   MatDestroySubMatrices(nd,&submatB);
145:   PetscFree(is1);
146:   PetscFree(is2);
147:   PetscFree(idx);
148:   PetscFree(rows);
149:   PetscFree(cols);
150:   PetscFree(vals);
151:   MatDestroy(&A);
152:   MatDestroy(&B);
153:   PetscRandomDestroy(&rdm);
154:   PetscFinalize();
155:   return 0;
156: }

158: /*TEST

160:    test:
161:       args: -mat_block_size {{1 2  5 7 8}} -ov {{1 3}} -mat_size {{11 13}} -nd {{7}}

163: TEST*/