1 static char help[] = "Testing MatCreateMPIMatConcatenateSeqMat().\n\n"; 2 3 #include <petscmat.h> 4 int main(int argc, char **argv) 5 { 6 Mat seqmat, mpimat; 7 PetscMPIInt rank; 8 PetscScalar value[3], *vals; 9 PetscInt i, col[3], n = 5, bs = 1; 10 11 PetscFunctionBeginUser; 12 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 13 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 14 PetscCall(PetscOptionsGetInt(NULL, NULL, "-bs", &bs, NULL)); 15 16 /* Create seqaij matrices of size (n+rank) by n */ 17 PetscCall(MatCreate(PETSC_COMM_SELF, &seqmat)); 18 PetscCall(MatSetSizes(seqmat, (n + rank) * bs, PETSC_DECIDE, PETSC_DECIDE, n * bs)); 19 PetscCall(MatSetFromOptions(seqmat)); 20 PetscCall(MatSeqAIJSetPreallocation(seqmat, 3 * bs, NULL)); 21 PetscCall(MatSeqBAIJSetPreallocation(seqmat, bs, 3, NULL)); 22 23 if (bs == 1) { 24 value[0] = -1.0; 25 value[1] = 2.0; 26 value[2] = -1.0; 27 for (i = 1; i < n - 1; i++) { 28 col[0] = i - 1; 29 col[1] = i; 30 col[2] = i + 1; 31 PetscCall(MatSetValues(seqmat, 1, &i, 3, col, value, INSERT_VALUES)); 32 } 33 i = n - 1; 34 col[0] = n - 2; 35 col[1] = n - 1; 36 PetscCall(MatSetValues(seqmat, 1, &i, 2, col, value, INSERT_VALUES)); 37 38 i = 0; 39 col[0] = 0; 40 col[1] = 1; 41 value[0] = 2.0; 42 value[1] = -1.0; 43 PetscCall(MatSetValues(seqmat, 1, &i, 2, col, value, INSERT_VALUES)); 44 } else { 45 PetscInt *rows, *cols, j; 46 PetscCall(PetscMalloc3(bs * bs, &vals, bs, &rows, bs, &cols)); 47 /* diagonal blocks */ 48 for (i = 0; i < bs * bs; i++) vals[i] = 2.0; 49 for (i = 0; i < n * bs; i += bs) { 50 for (j = 0; j < bs; j++) { 51 rows[j] = i + j; 52 cols[j] = i + j; 53 } 54 PetscCall(MatSetValues(seqmat, bs, rows, bs, cols, vals, INSERT_VALUES)); 55 } 56 /* off-diagonal blocks */ 57 for (i = 0; i < bs * bs; i++) vals[i] = -1.0; 58 for (i = 0; i < (n - 1) * bs; i += bs) { 59 for (j = 0; j < bs; j++) { 60 rows[j] = i + j; 61 cols[j] = i + bs + j; 62 } 63 PetscCall(MatSetValues(seqmat, bs, rows, bs, cols, vals, INSERT_VALUES)); 64 } 65 66 PetscCall(PetscFree3(vals, rows, cols)); 67 } 68 PetscCall(MatAssemblyBegin(seqmat, MAT_FINAL_ASSEMBLY)); 69 PetscCall(MatAssemblyEnd(seqmat, MAT_FINAL_ASSEMBLY)); 70 if (rank == 0) { 71 PetscCall(PetscPrintf(PETSC_COMM_SELF, "[%d] seqmat:\n", rank)); 72 PetscCall(MatView(seqmat, PETSC_VIEWER_STDOUT_SELF)); 73 } 74 75 PetscCall(MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD, seqmat, PETSC_DECIDE, MAT_INITIAL_MATRIX, &mpimat)); 76 PetscCall(MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD, seqmat, PETSC_DECIDE, MAT_REUSE_MATRIX, &mpimat)); 77 PetscCall(MatView(mpimat, PETSC_VIEWER_STDOUT_WORLD)); 78 79 PetscCall(MatDestroy(&seqmat)); 80 PetscCall(MatDestroy(&mpimat)); 81 PetscCall(PetscFinalize()); 82 return 0; 83 } 84 85 /*TEST 86 87 test: 88 nsize: 3 89 90 test: 91 suffix: 2 92 nsize: 3 93 args: -mat_type baij 94 95 test: 96 suffix: 3 97 nsize: 3 98 args: -mat_type baij -bs 2 99 100 TEST*/ 101