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