1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatCreateSubmatrix() with entire matrix, modified from ex59.c."; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 7*d71ae5a4SJacob Faibussowitsch { 8c4762a1bSJed Brown Mat C, A, Adup; 9c4762a1bSJed Brown PetscInt i, j, m = 3, n = 2, rstart, rend; 10c4762a1bSJed Brown PetscMPIInt size, rank; 11c4762a1bSJed Brown PetscScalar v; 12c4762a1bSJed Brown IS isrow; 13c4762a1bSJed Brown PetscBool detect_bug = PETSC_FALSE; 14c4762a1bSJed Brown 15327415f7SBarry Smith PetscFunctionBeginUser; 169566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 179566063dSJacob Faibussowitsch PetscCall(PetscOptionsHasName(NULL, NULL, "-detect_bug", &detect_bug)); 189566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 199566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 20c4762a1bSJed Brown n = 2 * size; 21c4762a1bSJed Brown 229566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &C)); 239566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 249566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 259566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 26c4762a1bSJed Brown 27c4762a1bSJed Brown /* 28c4762a1bSJed Brown This is JUST to generate a nice test matrix, all processors fill up 29c4762a1bSJed Brown the entire matrix. This is not something one would ever do in practice. 30c4762a1bSJed Brown */ 319566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C, &rstart, &rend)); 32c4762a1bSJed Brown for (i = rstart; i < rend; i++) { 33c4762a1bSJed Brown for (j = 0; j < m * n; j++) { 34c4762a1bSJed Brown v = i + j + 1; 359566063dSJacob Faibussowitsch PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES)); 36c4762a1bSJed Brown } 37c4762a1bSJed Brown } 389566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 399566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 409566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_COMMON)); 419566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD)); 429566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 43c4762a1bSJed Brown 44c4762a1bSJed Brown /* 45c4762a1bSJed Brown Generate a new matrix consisting every row and column of the original matrix 46c4762a1bSJed Brown */ 479566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C, &rstart, &rend)); 48c4762a1bSJed Brown 49c4762a1bSJed Brown /* Create parallel IS with the rows we want on THIS processor */ 50dd400576SPatrick Sanan if (detect_bug && rank == 0) { 519566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_WORLD, 1, rstart, 1, &isrow)); 52c4762a1bSJed Brown } else { 539566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_WORLD, rend - rstart, rstart, 1, &isrow)); 54c4762a1bSJed Brown } 559566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrix(C, isrow, NULL, MAT_INITIAL_MATRIX, &A)); 56c4762a1bSJed Brown 57c4762a1bSJed Brown /* Change C to test the case MAT_REUSE_MATRIX */ 58dd400576SPatrick Sanan if (rank == 0) { 599371c9d4SSatish Balay i = 0; 609371c9d4SSatish Balay j = 0; 619371c9d4SSatish Balay v = 100; 629566063dSJacob Faibussowitsch PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES)); 63c4762a1bSJed Brown } 649566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 659566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 66c4762a1bSJed Brown 679566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrix(C, isrow, NULL, MAT_REUSE_MATRIX, &A)); 689566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_COMMON)); 699566063dSJacob Faibussowitsch PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD)); 709566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 71c4762a1bSJed Brown 72c4762a1bSJed Brown /* Test MatDuplicate */ 739566063dSJacob Faibussowitsch PetscCall(MatDuplicate(A, MAT_COPY_VALUES, &Adup)); 749566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Adup)); 75c4762a1bSJed Brown 769566063dSJacob Faibussowitsch PetscCall(ISDestroy(&isrow)); 779566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 789566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 799566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 80b122ec5aSJacob Faibussowitsch return 0; 81c4762a1bSJed Brown } 82c4762a1bSJed Brown 83c4762a1bSJed Brown /*TEST 84c4762a1bSJed Brown 85c4762a1bSJed Brown test: 86c4762a1bSJed Brown nsize: 2 87c4762a1bSJed Brown filter: grep -v "Mat Object" 88c4762a1bSJed Brown requires: !complex 89c4762a1bSJed Brown 90c4762a1bSJed Brown test: 91c4762a1bSJed Brown suffix: 2 92c4762a1bSJed Brown nsize: 3 93c4762a1bSJed Brown args: -detect_bug 94c4762a1bSJed Brown filter: grep -v "Mat Object" 95c4762a1bSJed Brown requires: !complex 96c4762a1bSJed Brown 97c4762a1bSJed Brown TEST*/ 98