Actual source code: ex47.c


  2: static char help[] = "Tests the various routines in MatBAIJ format.\n\
  3: Input arguments are:\n\
  4:   -f <input_file> : file to load.  For example see $PETSC_DIR/share/petsc/datafiles/matrices\n\n";

  6: #include <petscmat.h>

  8: int main(int argc, char **args)
  9: {
 10:   Mat                A, B, C;
 11:   PetscViewer        va, vb, vc;
 12:   Vec                x, y;
 13:   PetscInt           i, j, row, m, n, ncols1, ncols2, ct, m2, n2;
 14:   const PetscInt    *cols1, *cols2;
 15:   char               file[PETSC_MAX_PATH_LEN];
 16:   PetscBool          tflg;
 17:   PetscScalar        rval;
 18:   const PetscScalar *vals1, *vals2;
 19:   PetscReal          norm1, norm2, rnorm;
 20:   PetscRandom        r;

 22:   PetscFunctionBeginUser;
 23:   PetscCall(PetscInitialize(&argc, &args, (char *)0, help));
 24:   PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), NULL));

 26:   /* Load the matrix as AIJ format */
 27:   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &va));
 28:   PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
 29:   PetscCall(MatSetType(A, MATSEQAIJ));
 30:   PetscCall(MatLoad(A, va));
 31:   PetscCall(PetscViewerDestroy(&va));

 33:   /* Load the matrix as BAIJ format */
 34:   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &vb));
 35:   PetscCall(MatCreate(PETSC_COMM_WORLD, &B));
 36:   PetscCall(MatSetType(B, MATSEQBAIJ));
 37:   PetscCall(MatLoad(B, vb));
 38:   PetscCall(PetscViewerDestroy(&vb));

 40:   /* Load the matrix as BAIJ format */
 41:   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &vc));
 42:   PetscCall(MatCreate(PETSC_COMM_WORLD, &C));
 43:   PetscCall(MatSetType(C, MATSEQBAIJ));
 44:   PetscCall(MatSetFromOptions(C));
 45:   PetscCall(MatLoad(C, vc));
 46:   PetscCall(PetscViewerDestroy(&vc));

 48:   PetscCall(MatGetSize(A, &m, &n));
 49:   PetscCall(MatGetSize(B, &m2, &n2));
 50:   PetscCheck(m == m2, PETSC_COMM_SELF, PETSC_ERR_ARG_SIZ, "Matrices are of different size. Cannot run this example");

 52:   /* Test MatEqual() */
 53:   PetscCall(MatEqual(B, C, &tflg));
 54:   PetscCheck(tflg, PETSC_COMM_SELF, PETSC_ERR_PLIB, "MatEqual() failed");

 56:   /* Test MatGetDiagonal() */
 57:   PetscCall(VecCreateSeq(PETSC_COMM_SELF, m, &x));
 58:   PetscCall(VecCreateSeq(PETSC_COMM_SELF, m, &y));

 60:   PetscCall(MatGetDiagonal(A, x));
 61:   PetscCall(MatGetDiagonal(B, y));

 63:   PetscCall(VecEqual(x, y, &tflg));
 64:   PetscCheck(tflg, PETSC_COMM_SELF, PETSC_ERR_PLIB, "MatGetDiagonal() failed");

 66:   /* Test MatDiagonalScale() */
 67:   PetscCall(PetscRandomCreate(PETSC_COMM_SELF, &r));
 68:   PetscCall(PetscRandomSetFromOptions(r));
 69:   PetscCall(VecSetRandom(x, r));
 70:   PetscCall(VecSetRandom(y, r));

 72:   PetscCall(MatDiagonalScale(A, x, y));
 73:   PetscCall(MatDiagonalScale(B, x, y));
 74:   PetscCall(MatMult(A, x, y));
 75:   PetscCall(VecNorm(y, NORM_2, &norm1));
 76:   PetscCall(MatMult(B, x, y));
 77:   PetscCall(VecNorm(y, NORM_2, &norm2));
 78:   rnorm = ((norm1 - norm2) * 100) / norm1;
 79:   PetscCheck(rnorm >= -0.1 && rnorm <= 0.01, PETSC_COMM_SELF, PETSC_ERR_PLIB, "MatDiagonalScale() failed Norm1 %g Norm2 %g", (double)norm1, (double)norm2);

 81:   /* Test MatGetRow()/ MatRestoreRow() */
 82:   for (ct = 0; ct < 100; ct++) {
 83:     PetscCall(PetscRandomGetValue(r, &rval));
 84:     row = (int)(rval * m);
 85:     PetscCall(MatGetRow(A, row, &ncols1, &cols1, &vals1));
 86:     PetscCall(MatGetRow(B, row, &ncols2, &cols2, &vals2));

 88:     for (i = 0, j = 0; i < ncols1 && j < ncols2; i++) {
 89:       while (cols2[j] != cols1[i]) j++;
 90:       PetscCheck(vals1[i] == vals2[j], PETSC_COMM_SELF, PETSC_ERR_PLIB, "MatGetRow() failed - vals incorrect.");
 91:     }
 92:     PetscCheck(i >= ncols1, PETSC_COMM_SELF, PETSC_ERR_PLIB, "MatGetRow() failed - cols incorrect");

 94:     PetscCall(MatRestoreRow(A, row, &ncols1, &cols1, &vals1));
 95:     PetscCall(MatRestoreRow(B, row, &ncols2, &cols2, &vals2));
 96:   }

 98:   PetscCall(MatDestroy(&A));
 99:   PetscCall(MatDestroy(&B));
100:   PetscCall(MatDestroy(&C));
101:   PetscCall(VecDestroy(&x));
102:   PetscCall(VecDestroy(&y));
103:   PetscCall(PetscRandomDestroy(&r));
104:   PetscCall(PetscFinalize());
105:   return 0;
106: }

108: /*TEST

110:    build:
111:       requires: !complex

113:    test:
114:       args: -f ${DATAFILESPATH}/matrices/cfd.1.10 -mat_block_size 5
115:       requires: !complex double datafilespath !defined(PETSC_USE_64BIT_INDICES)

117: TEST*/