Actual source code: ex52.c


  2: static char help[] = "Tests various routines in MatMPIBAIJ format.\n";

  4: #include <petscmat.h>

  6: int main(int argc,char **args)
  7: {
  8:   Mat            A;
  9:   PetscInt       m=2,bs=1,M,row,col,start,end,i,j,k;
 11:   PetscMPIInt    rank,size;
 12:   PetscScalar    data=100;
 13:   PetscBool      flg;

 15:   PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr;
 16:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 17:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 19:   /* Test MatSetValues() and MatGetValues() */
 20:   PetscOptionsGetInt(NULL,NULL,"-mat_block_size",&bs,NULL);
 21:   PetscOptionsGetInt(NULL,NULL,"-mat_size",&m,NULL);

 23:   M    = m*bs*size;
 24:   MatCreateBAIJ(PETSC_COMM_WORLD,bs,PETSC_DECIDE,PETSC_DECIDE,M,M,PETSC_DECIDE,NULL,PETSC_DECIDE,NULL,&A);

 26:   MatGetOwnershipRange(A,&start,&end);
 27:   PetscOptionsHasName(NULL,NULL,"-column_oriented",&flg);
 28:   if (flg) {
 29:     MatSetOption(A,MAT_ROW_ORIENTED,PETSC_FALSE);
 30:   }

 32:   /* inproc assembly */
 33:   for (row=start; row<end; row++) {
 34:     for (col=start; col<end; col++,data+=1) {
 35:       MatSetValues(A,1,&row,1,&col,&data,INSERT_VALUES);
 36:     }
 37:   }
 38:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 39:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 41:   /* offproc assembly */
 42:   data = 5.0;
 43:   row  = (M+start-1)%M;
 44:   for (col=0; col<M; col++) {
 45:     MatSetValues(A,1,&row,1,&col,&data,ADD_VALUES);
 46:   }
 47:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 48:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 50:   /* Test MatSetValuesBlocked() */
 51:   PetscOptionsHasName(NULL,NULL,"-test_setvaluesblocked",&flg);
 52:   if (flg) {
 53:     PetscScalar *bval;
 54:     row /= bs;
 55:     col  = start/bs;
 56:     PetscMalloc1(bs*bs,&bval);
 57:     k = 1;
 58:     /* row oriented - default */
 59:     for (i=0; i<bs; i++) {
 60:       for (j=0; j<bs; j++) {
 61:         bval[i*bs+j] = (PetscScalar)k; k++;
 62:       }
 63:     }
 64:     MatSetValuesBlocked(A,1,&row,1,&col,bval,INSERT_VALUES);
 65:     MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 66:     MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
 67:     PetscFree(bval);
 68:   }

 70:   MatView(A,PETSC_VIEWER_STDOUT_WORLD);
 71:   MatDestroy(&A);
 72:   PetscFinalize();
 73:   return ierr;
 74: }

 76: /*TEST

 78:    test:
 79:       suffix: 1
 80:       nsize: 3
 81:       args: -mat_block_size 2 -test_setvaluesblocked

 83:    test:
 84:       suffix: 2
 85:       nsize: 3
 86:       args: -mat_block_size 2 -test_setvaluesblocked -column_oriented

 88:    test:
 89:       suffix: 3
 90:       nsize: 3
 91:       args: -mat_block_size 1 -test_setvaluesblocked

 93:    test:
 94:       suffix: 4
 95:       nsize: 3
 96:       args: -mat_block_size 1 -test_setvaluesblocked -column_oriented

 98: TEST*/