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