Actual source code: ex52.c

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

  3: #include <petscmat.h>

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

 13:   PetscFunctionBeginUser;
 14:   PetscCall(PetscInitialize(&argc, &args, NULL, help));
 15:   PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
 16:   PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));

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

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

 25:   PetscCall(MatGetOwnershipRange(A, &start, &end));
 26:   PetscCall(PetscOptionsHasName(NULL, NULL, "-column_oriented", &flg));
 27:   if (flg) PetscCall(MatSetOption(A, MAT_ROW_ORIENTED, PETSC_FALSE));

 29:   /* inproc assembly */
 30:   for (row = start; row < end; row++) {
 31:     for (col = start; col < end; col++, data += 1) PetscCall(MatSetValues(A, 1, &row, 1, &col, &data, INSERT_VALUES));
 32:   }
 33:   PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
 34:   PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));

 36:   /* offproc assembly */
 37:   data = 5.0;
 38:   row  = (M + start - 1) % M;
 39:   for (col = 0; col < M; col++) PetscCall(MatSetValues(A, 1, &row, 1, &col, &data, ADD_VALUES));
 40:   PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
 41:   PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));

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

 64:   PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD));
 65:   PetscCall(MatDestroy(&A));
 66:   PetscCall(PetscFinalize());
 67:   return 0;
 68: }

 70: /*TEST

 72:    test:
 73:       suffix: 1
 74:       nsize: 3
 75:       args: -mat_block_size 2 -test_setvaluesblocked

 77:    test:
 78:       suffix: 2
 79:       nsize: 3
 80:       args: -mat_block_size 2 -test_setvaluesblocked -column_oriented

 82:    test:
 83:       suffix: 3
 84:       nsize: 3
 85:       args: -mat_block_size 1 -test_setvaluesblocked

 87:    test:
 88:       suffix: 4
 89:       nsize: 3
 90:       args: -mat_block_size 1 -test_setvaluesblocked -column_oriented

 92: TEST*/