1c4762a1bSJed Brown static char help[] = "Test MatTransposeMatMult() \n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown /* Example: 4c4762a1bSJed Brown mpiexec -n 8 ./ex209 -f <inputfile> (e.g., inputfile=ceres_solver_iteration_001_A.petsc) 5c4762a1bSJed Brown */ 6c4762a1bSJed Brown 7c4762a1bSJed Brown #include <petscmat.h> 8c4762a1bSJed Brown 9d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 10d71ae5a4SJacob Faibussowitsch { 11c4762a1bSJed Brown Mat A, C, AtA, B; 12c4762a1bSJed Brown PetscViewer fd; 13c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; 14c4762a1bSJed Brown PetscReal fill = 4.0; 15c4762a1bSJed Brown PetscMPIInt rank, size; 16c4762a1bSJed Brown PetscBool equal; 17c4762a1bSJed Brown PetscInt i, m, n, rstart, rend; 18c4762a1bSJed Brown PetscScalar one = 1.0; 19c4762a1bSJed Brown 20327415f7SBarry Smith PetscFunctionBeginUser; 21*c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &args, NULL, help)); 229566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 239566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 249566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), NULL)); 25c4762a1bSJed Brown 26c4762a1bSJed Brown /* Load matrix A */ 279566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &fd)); 289566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 299566063dSJacob Faibussowitsch PetscCall(MatSetType(A, MATAIJ)); 309566063dSJacob Faibussowitsch PetscCall(MatLoad(A, fd)); 319566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&fd)); 32c4762a1bSJed Brown 33c4762a1bSJed Brown /* Create identity matrix B */ 349566063dSJacob Faibussowitsch PetscCall(MatGetLocalSize(A, &m, &n)); 359566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &B)); 369566063dSJacob Faibussowitsch PetscCall(MatSetSizes(B, m, m, PETSC_DECIDE, PETSC_DECIDE)); 379566063dSJacob Faibussowitsch PetscCall(MatSetType(B, MATAIJ)); 389566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(B)); 399566063dSJacob Faibussowitsch PetscCall(MatSetUp(B)); 40c4762a1bSJed Brown 419566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(B, &rstart, &rend)); 4248a46eb9SPierre Jolivet for (i = rstart; i < rend; i++) PetscCall(MatSetValues(B, 1, &i, 1, &i, &one, INSERT_VALUES)); 439566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(B, MAT_FINAL_ASSEMBLY)); 449566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(B, MAT_FINAL_ASSEMBLY)); 45c4762a1bSJed Brown 46c4762a1bSJed Brown /* Compute AtA = A^T*B*A, B = identity matrix */ 479566063dSJacob Faibussowitsch PetscCall(MatPtAP(B, A, MAT_INITIAL_MATRIX, fill, &AtA)); 489566063dSJacob Faibussowitsch PetscCall(MatPtAP(B, A, MAT_REUSE_MATRIX, fill, &AtA)); 49dd400576SPatrick Sanan if (rank == 0) printf("C = A^T*B*A is done...\n"); 509566063dSJacob Faibussowitsch PetscCall(MatDestroy(&B)); 51c4762a1bSJed Brown 52c4762a1bSJed Brown /* Compute C = A^T*A */ 539566063dSJacob Faibussowitsch PetscCall(MatTransposeMatMult(A, A, MAT_INITIAL_MATRIX, fill, &C)); 54dd400576SPatrick Sanan if (rank == 0) printf("C = A^T*A is done...\n"); 559566063dSJacob Faibussowitsch PetscCall(MatTransposeMatMult(A, A, MAT_REUSE_MATRIX, fill, &C)); 56dd400576SPatrick Sanan if (rank == 0) printf("REUSE C = A^T*A is done...\n"); 57c4762a1bSJed Brown 58c4762a1bSJed Brown /* Compare C and AtA */ 599566063dSJacob Faibussowitsch PetscCall(MatMultEqual(C, AtA, 20, &equal)); 6028b400f6SJacob Faibussowitsch PetscCheck(equal, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONGSTATE, "A^T*A != At*A"); 619566063dSJacob Faibussowitsch PetscCall(MatDestroy(&AtA)); 62c4762a1bSJed Brown 639566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 649566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 659566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 66b122ec5aSJacob Faibussowitsch return 0; 67c4762a1bSJed Brown } 68c4762a1bSJed Brown 69c4762a1bSJed Brown /*TEST 70c4762a1bSJed Brown 71c4762a1bSJed Brown test: 72dfd57a17SPierre Jolivet requires: datafilespath !complex double !defined(PETSC_USE_64BIT_INDICES) 73c4762a1bSJed Brown args: -f ${DATAFILESPATH}/matrices/arco1 74c4762a1bSJed Brown 75c4762a1bSJed Brown test: 76c4762a1bSJed Brown suffix: 2 77c4762a1bSJed Brown nsize: 4 78dfd57a17SPierre Jolivet requires: datafilespath !complex double !defined(PETSC_USE_64BIT_INDICES) 79c4762a1bSJed Brown args: -f ${DATAFILESPATH}/matrices/arco1 -matptap_via nonscalable 80c4762a1bSJed Brown 81c4762a1bSJed Brown TEST*/ 82