1c4762a1bSJed Brown static char help[] = "Tests MatCreateSubmatrix() with entire matrix, modified from ex59.c."; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown 5d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 6d71ae5a4SJacob Faibussowitsch { 7c4762a1bSJed Brown Mat C, A, Adup; 8c4762a1bSJed Brown PetscInt i, j, m = 3, n = 2, rstart, rend; 9c4762a1bSJed Brown PetscMPIInt size, rank; 10c4762a1bSJed Brown PetscScalar v; 11c4762a1bSJed Brown IS isrow; 12c4762a1bSJed Brown PetscBool detect_bug = PETSC_FALSE; 13c4762a1bSJed Brown 14327415f7SBarry Smith PetscFunctionBeginUser; 15*c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &args, NULL, help)); 169566063dSJacob Faibussowitsch PetscCall(PetscOptionsHasName(NULL, NULL, "-detect_bug", &detect_bug)); 179566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 189566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 19c4762a1bSJed Brown n = 2 * size; 20c4762a1bSJed Brown 219566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &C)); 229566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 239566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 249566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 25c4762a1bSJed Brown 26c4762a1bSJed Brown /* 27c4762a1bSJed Brown This is JUST to generate a nice test matrix, all processors fill up 28c4762a1bSJed Brown the entire matrix. This is not something one would ever do in practice. 29c4762a1bSJed Brown */ 309566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C, &rstart, &rend)); 31c4762a1bSJed Brown for (i = rstart; i < rend; i++) { 32c4762a1bSJed Brown for (j = 0; j < m * n; j++) { 33c4762a1bSJed Brown v = i + j + 1; 349566063dSJacob Faibussowitsch PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES)); 35c4762a1bSJed Brown } 36c4762a1bSJed Brown } 379566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 389566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 399566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_COMMON)); 409566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD)); 419566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 42c4762a1bSJed Brown 43c4762a1bSJed Brown /* 44c4762a1bSJed Brown Generate a new matrix consisting every row and column of the original matrix 45c4762a1bSJed Brown */ 469566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C, &rstart, &rend)); 47c4762a1bSJed Brown 48c4762a1bSJed Brown /* Create parallel IS with the rows we want on THIS processor */ 49dd400576SPatrick Sanan if (detect_bug && rank == 0) { 509566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_WORLD, 1, rstart, 1, &isrow)); 51c4762a1bSJed Brown } else { 529566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_WORLD, rend - rstart, rstart, 1, &isrow)); 53c4762a1bSJed Brown } 549566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrix(C, isrow, NULL, MAT_INITIAL_MATRIX, &A)); 55c4762a1bSJed Brown 56c4762a1bSJed Brown /* Change C to test the case MAT_REUSE_MATRIX */ 57dd400576SPatrick Sanan if (rank == 0) { 589371c9d4SSatish Balay i = 0; 599371c9d4SSatish Balay j = 0; 609371c9d4SSatish Balay v = 100; 619566063dSJacob Faibussowitsch PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES)); 62c4762a1bSJed Brown } 639566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 649566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 65c4762a1bSJed Brown 669566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrix(C, isrow, NULL, MAT_REUSE_MATRIX, &A)); 679566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_COMMON)); 689566063dSJacob Faibussowitsch PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD)); 699566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 70c4762a1bSJed Brown 71c4762a1bSJed Brown /* Test MatDuplicate */ 729566063dSJacob Faibussowitsch PetscCall(MatDuplicate(A, MAT_COPY_VALUES, &Adup)); 739566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Adup)); 74c4762a1bSJed Brown 759566063dSJacob Faibussowitsch PetscCall(ISDestroy(&isrow)); 769566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 779566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 789566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 79b122ec5aSJacob Faibussowitsch return 0; 80c4762a1bSJed Brown } 81c4762a1bSJed Brown 82c4762a1bSJed Brown /*TEST 83c4762a1bSJed Brown 84c4762a1bSJed Brown test: 85c4762a1bSJed Brown nsize: 2 86c4762a1bSJed Brown filter: grep -v "Mat Object" 87c4762a1bSJed Brown requires: !complex 88c4762a1bSJed Brown 89c4762a1bSJed Brown test: 90c4762a1bSJed Brown suffix: 2 91c4762a1bSJed Brown nsize: 3 92c4762a1bSJed Brown args: -detect_bug 93c4762a1bSJed Brown filter: grep -v "Mat Object" 94c4762a1bSJed Brown requires: !complex 95c4762a1bSJed Brown 96c4762a1bSJed Brown TEST*/ 97