1 2 static char help[] = "Tests sequential and parallel MatMatMult() and MatAXPY(...,SUBSET_NONZERO_PATTERN) \n\ 3 Input arguments are:\n\ 4 -f <input_file> : file to load\n\n"; 5 /* e.g., mpiexec -n 3 ./ex113 -f <file> */ 6 7 #include <petscmat.h> 8 9 int main(int argc,char **args) 10 { 11 Mat A,A1,A2,Mtmp,dstMat; 12 PetscViewer viewer; 13 PetscErrorCode ierr; 14 PetscReal fill=4.0; 15 char file[128]; 16 PetscBool flg; 17 18 ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 19 /* Load the matrix A */ 20 CHKERRQ(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg)); 21 PetscCheck(flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate a file name for matrix A with the -f option."); 22 23 CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&viewer)); 24 CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 25 CHKERRQ(MatLoad(A,viewer)); 26 CHKERRQ(PetscViewerDestroy(&viewer)); 27 28 CHKERRQ(MatDuplicate(A,MAT_COPY_VALUES,&A1)); 29 CHKERRQ(MatDuplicate(A,MAT_COPY_VALUES,&A2)); 30 31 /* dstMat = A*A1*A2 */ 32 CHKERRQ(MatMatMult(A1,A2,MAT_INITIAL_MATRIX,fill,&Mtmp)); 33 CHKERRQ(MatMatMult(A,Mtmp,MAT_INITIAL_MATRIX,fill,&dstMat)); 34 CHKERRQ(MatDestroy(&Mtmp)); 35 36 /* dstMat += A1*A2 */ 37 CHKERRQ(MatMatMult(A1,A2,MAT_INITIAL_MATRIX,fill,&Mtmp)); 38 CHKERRQ(MatAXPY(dstMat,1.0,Mtmp,SUBSET_NONZERO_PATTERN)); 39 CHKERRQ(MatDestroy(&Mtmp)); 40 41 /* dstMat += A*A1 */ 42 CHKERRQ(MatMatMult(A,A1,MAT_INITIAL_MATRIX,fill,&Mtmp)); 43 CHKERRQ(MatAXPY(dstMat, 1.0, Mtmp,SUBSET_NONZERO_PATTERN)); 44 CHKERRQ(MatDestroy(&Mtmp)); 45 46 /* dstMat += A */ 47 CHKERRQ(MatAXPY(dstMat, 1.0, A,SUBSET_NONZERO_PATTERN)); 48 49 CHKERRQ(MatDestroy(&A)); 50 CHKERRQ(MatDestroy(&A1)); 51 CHKERRQ(MatDestroy(&A2)); 52 CHKERRQ(MatDestroy(&dstMat)); 53 ierr = PetscFinalize(); 54 return ierr; 55 } 56