1 static char help[] = "Testing MatCreateMPIAIJSumSeqAIJ().\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc, char **argv) 6 { 7 Mat A, B; 8 MatScalar a[1], alpha; 9 PetscMPIInt size, rank; 10 PetscInt m, n, i, col, prid; 11 12 PetscFunctionBeginUser; 13 PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 14 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 15 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 16 prid = size; 17 PetscCall(PetscOptionsGetInt(NULL, NULL, "-prid", &prid, NULL)); 18 19 m = n = 10 * size; 20 PetscCall(MatCreate(PETSC_COMM_SELF, &A)); 21 PetscCall(MatSetSizes(A, PETSC_DETERMINE, PETSC_DETERMINE, m, n)); 22 PetscCall(MatSetType(A, MATSEQAIJ)); 23 PetscCall(MatSetUp(A)); 24 25 a[0] = rank + 1; 26 for (i = 0; i < m - rank; i++) { 27 col = i + rank; 28 PetscCall(MatSetValues(A, 1, &i, 1, &col, a, INSERT_VALUES)); 29 } 30 PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY)); 31 PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY)); 32 33 if (rank == prid) { 34 PetscCall(PetscPrintf(PETSC_COMM_SELF, "[%d] A: \n", rank)); 35 PetscCall(MatView(A, PETSC_VIEWER_STDOUT_SELF)); 36 } 37 38 /* Test MatCreateMPIAIJSumSeqAIJ */ 39 PetscCall(MatCreateMPIAIJSumSeqAIJ(PETSC_COMM_WORLD, A, PETSC_DECIDE, PETSC_DECIDE, MAT_INITIAL_MATRIX, &B)); 40 41 /* Test MAT_REUSE_MATRIX */ 42 alpha = 0.1; 43 for (i = 0; i < 3; i++) { 44 PetscCall(MatScale(A, alpha)); 45 PetscCall(MatCreateMPIAIJSumSeqAIJ(PETSC_COMM_WORLD, A, PETSC_DECIDE, PETSC_DECIDE, MAT_REUSE_MATRIX, &B)); 46 } 47 PetscCall(MatView(B, PETSC_VIEWER_STDOUT_WORLD)); 48 PetscCall(MatDestroy(&B)); 49 PetscCall(MatDestroy(&A)); 50 PetscCall(PetscFinalize()); 51 return 0; 52 } 53 54 /*TEST 55 56 test: 57 nsize: 3 58 filter: grep -v " MPI process" 59 60 test: 61 suffix: 2 62 filter: grep -v " MPI process" 63 64 TEST*/ 65