1 static char help[] = "Testing MatCreateMPIAIJWithSplitArrays().\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc, char **argv) { 6 Mat A, B; 7 PetscInt i, j, column, *ooj; 8 PetscInt *di, *dj, *oi, *oj, nd; 9 const PetscInt *garray; 10 PetscScalar *oa, *da; 11 PetscScalar value; 12 PetscRandom rctx; 13 PetscBool equal, done; 14 Mat AA, AB; 15 PetscMPIInt size, rank; 16 17 PetscFunctionBeginUser; 18 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 19 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 20 PetscCheck(size > 1, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "Must run with 2 or more processes"); 21 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 22 23 /* Create a mpiaij matrix for checking */ 24 PetscCall(MatCreateAIJ(PETSC_COMM_WORLD, 5, 5, PETSC_DECIDE, PETSC_DECIDE, 0, NULL, 0, NULL, &A)); 25 PetscCall(MatSetOption(A, MAT_NEW_NONZERO_LOCATION_ERR, PETSC_FALSE)); 26 PetscCall(MatSetUp(A)); 27 PetscCall(PetscRandomCreate(PETSC_COMM_WORLD, &rctx)); 28 PetscCall(PetscRandomSetFromOptions(rctx)); 29 30 for (i = 5 * rank; i < 5 * rank + 5; i++) { 31 for (j = 0; j < 5 * size; j++) { 32 PetscCall(PetscRandomGetValue(rctx, &value)); 33 column = (PetscInt)(5 * size * PetscRealPart(value)); 34 PetscCall(PetscRandomGetValue(rctx, &value)); 35 PetscCall(MatSetValues(A, 1, &i, 1, &column, &value, INSERT_VALUES)); 36 } 37 } 38 PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY)); 39 PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY)); 40 41 PetscCall(MatMPIAIJGetSeqAIJ(A, &AA, &AB, &garray)); 42 PetscCall(MatGetRowIJ(AA, 0, PETSC_FALSE, PETSC_FALSE, &nd, (const PetscInt **)&di, (const PetscInt **)&dj, &done)); 43 PetscCall(MatSeqAIJGetArray(AA, &da)); 44 PetscCall(MatGetRowIJ(AB, 0, PETSC_FALSE, PETSC_FALSE, &nd, (const PetscInt **)&oi, (const PetscInt **)&oj, &done)); 45 PetscCall(MatSeqAIJGetArray(AB, &oa)); 46 47 PetscCall(PetscMalloc1(oi[5], &ooj)); 48 PetscCall(PetscArraycpy(ooj, oj, oi[5])); 49 /* modify the column entries in the non-diagonal portion back to global numbering */ 50 for (i = 0; i < oi[5]; i++) { ooj[i] = garray[ooj[i]]; } 51 52 PetscCall(MatCreateMPIAIJWithSplitArrays(PETSC_COMM_WORLD, 5, 5, PETSC_DETERMINE, PETSC_DETERMINE, di, dj, da, oi, ooj, oa, &B)); 53 PetscCall(MatSetUp(B)); 54 PetscCall(MatEqual(A, B, &equal)); 55 56 PetscCall(MatRestoreRowIJ(AA, 0, PETSC_FALSE, PETSC_FALSE, &nd, (const PetscInt **)&di, (const PetscInt **)&dj, &done)); 57 PetscCall(MatSeqAIJRestoreArray(AA, &da)); 58 PetscCall(MatRestoreRowIJ(AB, 0, PETSC_FALSE, PETSC_FALSE, &nd, (const PetscInt **)&oi, (const PetscInt **)&oj, &done)); 59 PetscCall(MatSeqAIJRestoreArray(AB, &oa)); 60 61 PetscCheck(equal, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Likely a bug in MatCreateMPIAIJWithSplitArrays()"); 62 63 /* Free spaces */ 64 PetscCall(PetscFree(ooj)); 65 PetscCall(PetscRandomDestroy(&rctx)); 66 PetscCall(MatDestroy(&A)); 67 PetscCall(MatDestroy(&B)); 68 PetscCall(PetscFree(oj)); 69 PetscCall(PetscFinalize()); 70 return 0; 71 } 72 73 /*TEST 74 75 test: 76 nsize: 3 77 78 TEST*/ 79