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 PetscRandom r; 10 PetscBool equal=PETSC_FALSE; 11 PetscReal fill = 1.0; 12 PetscInt nza,am,an; 13 14 PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 15 PetscCall(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 16 PetscCall(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 17 PetscCall(PetscOptionsGetReal(NULL,NULL,"-fill",&fill,NULL)); 18 19 PetscCall(PetscRandomCreate(PETSC_COMM_WORLD,&r)); 20 PetscCall(PetscRandomSetFromOptions(r)); 21 22 /* create a aij matrix A */ 23 PetscCall(MatCreate(PETSC_COMM_WORLD,&A)); 24 PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,M)); 25 PetscCall(MatSetType(A,MATAIJ)); 26 nza = (PetscInt)(.3*M); /* num of nozeros in each row of A */ 27 PetscCall(MatSeqAIJSetPreallocation(A,nza,NULL)); 28 PetscCall(MatMPIAIJSetPreallocation(A,nza,NULL,nza,NULL)); 29 PetscCall(MatSetRandom(A,r)); 30 31 /* create a dense matrix B */ 32 PetscCall(MatGetLocalSize(A,&am,&an)); 33 PetscCall(MatCreate(PETSC_COMM_WORLD,&B)); 34 PetscCall(MatSetSizes(B,PETSC_DECIDE,am,N,PETSC_DECIDE)); 35 PetscCall(MatSetType(B,MATDENSE)); 36 PetscCall(MatSeqDenseSetPreallocation(B,NULL)); 37 PetscCall(MatMPIDenseSetPreallocation(B,NULL)); 38 PetscCall(MatSetRandom(B,r)); 39 PetscCall(PetscRandomDestroy(&r)); 40 PetscCall(MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY)); 41 PetscCall(MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY)); 42 43 /* Test MatMatMult() */ 44 PetscCall(MatMatMult(B,A,MAT_INITIAL_MATRIX,fill,&C)); 45 PetscCall(MatMatMult(B,A,MAT_REUSE_MATRIX,fill,&C)); 46 PetscCall(MatMatMultEqual(B,A,C,10,&equal)); 47 PetscCheck(equal,PETSC_COMM_SELF,PETSC_ERR_ARG_WRONGSTATE,"C != B*A"); 48 49 PetscCall(MatDestroy(&C)); 50 PetscCall(MatDestroy(&B)); 51 PetscCall(MatDestroy(&A)); 52 PetscCall(PetscFinalize()); 53 return 0; 54 } 55 56 /*TEST 57 58 test: 59 output_file: output/ex122.out 60 61 TEST*/ 62