1 static char help[] = "Test MatMatMult() for AIJ and Dense matrices.\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc,char **argv) 6 { 7 Mat A,B,C; 8 PetscInt M=10,N=5; 9 PetscErrorCode ierr; 10 PetscRandom r; 11 PetscBool equal=PETSC_FALSE; 12 PetscReal fill = 1.0; 13 PetscInt nza,am,an; 14 15 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 16 ierr = PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL);CHKERRQ(ierr); 17 ierr = PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);CHKERRQ(ierr); 18 ierr = PetscOptionsGetReal(NULL,NULL,"-fill",&fill,NULL);CHKERRQ(ierr); 19 20 ierr = PetscRandomCreate(PETSC_COMM_WORLD,&r);CHKERRQ(ierr); 21 ierr = PetscRandomSetFromOptions(r);CHKERRQ(ierr); 22 23 /* create a aij matrix A */ 24 ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr); 25 ierr = MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,M);CHKERRQ(ierr); 26 ierr = MatSetType(A,MATAIJ);CHKERRQ(ierr); 27 nza = (PetscInt)(.3*M); /* num of nozeros in each row of A */ 28 ierr = MatSeqAIJSetPreallocation(A,nza,NULL);CHKERRQ(ierr); 29 ierr = MatMPIAIJSetPreallocation(A,nza,NULL,nza,NULL);CHKERRQ(ierr); 30 ierr = MatSetRandom(A,r);CHKERRQ(ierr); 31 32 /* create a dense matrix B */ 33 ierr = MatGetLocalSize(A,&am,&an);CHKERRQ(ierr); 34 ierr = MatCreate(PETSC_COMM_WORLD,&B);CHKERRQ(ierr); 35 ierr = MatSetSizes(B,PETSC_DECIDE,am,N,PETSC_DECIDE);CHKERRQ(ierr); 36 ierr = MatSetType(B,MATDENSE);CHKERRQ(ierr); 37 ierr = MatSeqDenseSetPreallocation(B,NULL);CHKERRQ(ierr); 38 ierr = MatMPIDenseSetPreallocation(B,NULL);CHKERRQ(ierr); 39 ierr = MatSetRandom(B,r);CHKERRQ(ierr); 40 ierr = PetscRandomDestroy(&r);CHKERRQ(ierr); 41 ierr = MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 42 ierr = MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 43 44 45 /* Test MatMatMult() */ 46 ierr = MatMatMult(B,A,MAT_INITIAL_MATRIX,fill,&C);CHKERRQ(ierr); 47 ierr = MatMatMult(B,A,MAT_REUSE_MATRIX,fill,&C);CHKERRQ(ierr); 48 ierr = MatMatMultEqual(B,A,C,10,&equal);CHKERRQ(ierr); 49 if (!equal) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONGSTATE,"C != B*A"); 50 51 ierr = MatDestroy(&C);CHKERRQ(ierr); 52 ierr = MatDestroy(&B);CHKERRQ(ierr); 53 ierr = MatDestroy(&A);CHKERRQ(ierr); 54 ierr = PetscFinalize(); 55 return ierr; 56 } 57 58 59 /*TEST 60 61 test: 62 output_file: output/ex122.out 63 64 TEST*/ 65