1 static char help[] = "Testing PtAP for SeqMAIJ matrix, P, with SeqAIJ matrix, A.\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc,char **argv) 6 { 7 Mat pA,P,aijP; 8 PetscScalar pa[]={1.,-1.,0.,0.,1.,-1.,0.,0.,1.}; 9 PetscInt i,pij[]={0,1,2}; 10 PetscInt aij[3][3]={{0,1,2},{3,4,5},{6,7,8}}; 11 Mat A,mC,C; 12 PetscScalar one=1.; 13 PetscMPIInt size; 14 PetscBool flg; 15 16 PetscFunctionBeginUser; 17 PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 18 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 19 PetscCheck(size == 1,PETSC_COMM_WORLD,PETSC_ERR_WRONG_MPI_SIZE,"This is a uniprocessor example only!"); 20 21 /* Create MAIJ matrix, P */ 22 PetscCall(MatCreate(PETSC_COMM_SELF,&pA)); 23 PetscCall(MatSetSizes(pA,3,3,3,3)); 24 PetscCall(MatSetType(pA,MATSEQAIJ)); 25 PetscCall(MatSetUp(pA)); 26 PetscCall(MatSetOption(pA,MAT_IGNORE_ZERO_ENTRIES,PETSC_TRUE)); 27 PetscCall(MatSetValues(pA,3,pij,3,pij,pa,ADD_VALUES)); 28 PetscCall(MatAssemblyBegin(pA,MAT_FINAL_ASSEMBLY)); 29 PetscCall(MatAssemblyEnd(pA,MAT_FINAL_ASSEMBLY)); 30 PetscCall(MatCreateMAIJ(pA,3,&P)); 31 PetscCall(MatDestroy(&pA)); 32 33 /* Create AIJ equivalent matrix, aijP, for comparison testing */ 34 PetscCall(MatConvert(P,MATSEQAIJ,MAT_INITIAL_MATRIX,&aijP)); 35 36 /* Create AIJ matrix A */ 37 PetscCall(MatCreate(PETSC_COMM_SELF,&A)); 38 PetscCall(MatSetSizes(A,9,9,9,9)); 39 PetscCall(MatSetType(A,MATSEQAIJ)); 40 PetscCall(MatSetUp(A)); 41 PetscCall(MatSetOption(A,MAT_IGNORE_ZERO_ENTRIES,PETSC_TRUE)); 42 PetscCall(MatSetValues(A,3,aij[0],3,aij[0],pa,ADD_VALUES)); 43 PetscCall(MatSetValues(A,3,aij[1],3,aij[1],pa,ADD_VALUES)); 44 PetscCall(MatSetValues(A,3,aij[2],3,aij[2],pa,ADD_VALUES)); 45 for (i=0; i<9; i++) { 46 PetscCall(MatSetValue(A,i,i,one,ADD_VALUES)); 47 } 48 PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 49 PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 50 51 /* Perform PtAP_SeqAIJ_SeqAIJ for comparison testing */ 52 PetscCall(MatPtAP(A,aijP,MAT_INITIAL_MATRIX,1.,&C)); 53 54 /* Perform PtAP_SeqAIJ_SeqMAIJ */ 55 /* Developer API */ 56 PetscCall(MatProductCreate(A,P,NULL,&mC)); 57 PetscCall(MatProductSetType(mC,MATPRODUCT_PtAP)); 58 PetscCall(MatProductSetAlgorithm(mC,"default")); 59 PetscCall(MatProductSetFill(mC,PETSC_DEFAULT)); 60 PetscCall(MatProductSetFromOptions(mC)); 61 PetscCall(MatProductSymbolic(mC)); 62 PetscCall(MatProductNumeric(mC)); 63 PetscCall(MatProductNumeric(mC)); 64 65 /* Check mC = C */ 66 PetscCall(MatEqual(C,mC,&flg)); 67 PetscCheck(flg,PETSC_COMM_SELF,PETSC_ERR_ARG_INCOMP,"MatProduct C != mC"); 68 PetscCall(MatDestroy(&mC)); 69 70 /* User API */ 71 PetscCall(MatPtAP(A,P,MAT_INITIAL_MATRIX,1.,&mC)); 72 PetscCall(MatPtAP(A,P,MAT_REUSE_MATRIX,1.,&mC)); 73 74 /* Check mC = C */ 75 PetscCall(MatEqual(C,mC,&flg)); 76 PetscCheck(flg,PETSC_COMM_SELF,PETSC_ERR_ARG_INCOMP,"MatPtAP C != mC"); 77 PetscCall(MatDestroy(&mC)); 78 79 /* Cleanup */ 80 PetscCall(MatDestroy(&P)); 81 PetscCall(MatDestroy(&aijP)); 82 PetscCall(MatDestroy(&A)); 83 PetscCall(MatDestroy(&C)); 84 PetscCall(PetscFinalize()); 85 return 0; 86 } 87 88 /*TEST 89 90 test: 91 output_file: output/ex101.out 92 93 TEST*/ 94