1c4762a1bSJed Brown static char help[] = "Tests sequential and parallel MatMatMult() and MatAXPY(...,SUBSET_NONZERO_PATTERN) \n\ 2c4762a1bSJed Brown Input arguments are:\n\ 3c4762a1bSJed Brown -f <input_file> : file to load\n\n"; 4c4762a1bSJed Brown /* e.g., mpiexec -n 3 ./ex113 -f <file> */ 5c4762a1bSJed Brown 6c4762a1bSJed Brown #include <petscmat.h> 7c4762a1bSJed Brown 8d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 9d71ae5a4SJacob Faibussowitsch { 10c4762a1bSJed Brown Mat A, A1, A2, Mtmp, dstMat; 11c4762a1bSJed Brown PetscViewer viewer; 12c4762a1bSJed Brown PetscReal fill = 4.0; 13c4762a1bSJed Brown char file[128]; 14c4762a1bSJed Brown PetscBool flg; 15c4762a1bSJed Brown 16327415f7SBarry Smith PetscFunctionBeginUser; 17*c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &args, NULL, help)); 18c4762a1bSJed Brown /* Load the matrix A */ 199566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), &flg)); 2028b400f6SJacob Faibussowitsch PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_USER, "Must indicate a file name for matrix A with the -f option."); 21c4762a1bSJed Brown 229566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &viewer)); 239566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 249566063dSJacob Faibussowitsch PetscCall(MatLoad(A, viewer)); 259566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 26c4762a1bSJed Brown 279566063dSJacob Faibussowitsch PetscCall(MatDuplicate(A, MAT_COPY_VALUES, &A1)); 289566063dSJacob Faibussowitsch PetscCall(MatDuplicate(A, MAT_COPY_VALUES, &A2)); 29c4762a1bSJed Brown 30c4762a1bSJed Brown /* dstMat = A*A1*A2 */ 319566063dSJacob Faibussowitsch PetscCall(MatMatMult(A1, A2, MAT_INITIAL_MATRIX, fill, &Mtmp)); 329566063dSJacob Faibussowitsch PetscCall(MatMatMult(A, Mtmp, MAT_INITIAL_MATRIX, fill, &dstMat)); 339566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 34c4762a1bSJed Brown 35c4762a1bSJed Brown /* dstMat += A1*A2 */ 369566063dSJacob Faibussowitsch PetscCall(MatMatMult(A1, A2, MAT_INITIAL_MATRIX, fill, &Mtmp)); 379566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat, 1.0, Mtmp, SUBSET_NONZERO_PATTERN)); 389566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 39c4762a1bSJed Brown 40c4762a1bSJed Brown /* dstMat += A*A1 */ 419566063dSJacob Faibussowitsch PetscCall(MatMatMult(A, A1, MAT_INITIAL_MATRIX, fill, &Mtmp)); 429566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat, 1.0, Mtmp, SUBSET_NONZERO_PATTERN)); 439566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 44c4762a1bSJed Brown 45c4762a1bSJed Brown /* dstMat += A */ 469566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat, 1.0, A, SUBSET_NONZERO_PATTERN)); 47c4762a1bSJed Brown 489566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 499566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A1)); 509566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A2)); 519566063dSJacob Faibussowitsch PetscCall(MatDestroy(&dstMat)); 529566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 53b122ec5aSJacob Faibussowitsch return 0; 54c4762a1bSJed Brown } 55