1 2 static char help[] = "Tests MatCreateLRC()\n\n"; 3 4 /*T 5 Concepts: Low rank correction 6 7 Processors: n 8 T*/ 9 10 #include <petscmat.h> 11 12 int main(int argc,char **args) 13 { 14 Vec x,b,c=NULL; 15 Mat A,U,V,LR,X,LRe; 16 PetscInt M = 5, N = 7; 17 PetscErrorCode ierr; 18 PetscBool flg; 19 20 ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 21 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-m",&M,NULL)); 22 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-n",&N,NULL)); 23 24 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 25 Create the sparse matrix 26 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 27 CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 28 CHKERRQ(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,M,N)); 29 CHKERRQ(MatSetOptionsPrefix(A,"A_")); 30 CHKERRQ(MatSetFromOptions(A)); 31 CHKERRQ(MatSeqAIJSetPreallocation(A,5,NULL)); 32 CHKERRQ(MatMPIAIJSetPreallocation(A,5,NULL,5,NULL)); 33 CHKERRQ(MatSetUp(A)); 34 CHKERRQ(MatSetRandom(A,NULL)); 35 36 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 37 Create the dense matrices 38 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 39 CHKERRQ(MatCreate(PETSC_COMM_WORLD,&U)); 40 CHKERRQ(MatSetSizes(U,PETSC_DECIDE,PETSC_DECIDE,M,3)); 41 CHKERRQ(MatSetType(U,MATDENSE)); 42 CHKERRQ(MatSetOptionsPrefix(U,"U_")); 43 CHKERRQ(MatSetFromOptions(U)); 44 CHKERRQ(MatSetUp(U)); 45 CHKERRQ(MatSetRandom(U,NULL)); 46 47 CHKERRQ(MatCreate(PETSC_COMM_WORLD,&V)); 48 CHKERRQ(MatSetSizes(V,PETSC_DECIDE,PETSC_DECIDE,N,3)); 49 CHKERRQ(MatSetType(V,MATDENSE)); 50 CHKERRQ(MatSetOptionsPrefix(V,"V_")); 51 CHKERRQ(MatSetFromOptions(V)); 52 CHKERRQ(MatSetUp(V)); 53 CHKERRQ(MatSetRandom(V,NULL)); 54 55 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 56 Create a vector to hold the diagonal of C 57 A sequential vector can be created as well on each process 58 It is user responsibility to ensure the data in the vector 59 is consistent across processors 60 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 61 CHKERRQ(PetscOptionsHasName(NULL,NULL,"-use_c",&flg)); 62 if (flg) { 63 CHKERRQ(VecCreateMPI(PETSC_COMM_WORLD,PETSC_DECIDE,3,&c)); 64 CHKERRQ(VecSetRandom(c,NULL)); 65 } 66 67 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 68 Create low rank correction matrix 69 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 70 CHKERRQ(PetscOptionsHasName(NULL,NULL,"-low_rank",&flg)); 71 if (flg) { 72 /* create a low-rank matrix, with no A-matrix */ 73 CHKERRQ(MatCreateLRC(NULL,U,c,V,&LR)); 74 CHKERRQ(MatDestroy(&A)); 75 } else { 76 CHKERRQ(MatCreateLRC(A,U,c,V,&LR)); 77 } 78 79 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 80 Create the low rank correction matrix explicitly to check for 81 correctness 82 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 83 CHKERRQ(MatHermitianTranspose(V,MAT_INITIAL_MATRIX,&X)); 84 CHKERRQ(MatDiagonalScale(X,c,NULL)); 85 CHKERRQ(MatMatMult(U,X,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&LRe)); 86 CHKERRQ(MatDestroy(&X)); 87 if (A) { 88 CHKERRQ(MatAYPX(LRe,1.0,A,DIFFERENT_NONZERO_PATTERN)); 89 } 90 91 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 92 Create test vectors 93 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 94 CHKERRQ(MatCreateVecs(LR,&x,&b)); 95 CHKERRQ(VecSetRandom(x,NULL)); 96 CHKERRQ(MatMult(LR,x,b)); 97 CHKERRQ(MatMultTranspose(LR,b,x)); 98 CHKERRQ(VecDestroy(&x)); 99 CHKERRQ(VecDestroy(&b)); 100 101 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 102 Check correctness 103 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 104 CHKERRQ(MatMultEqual(LR,LRe,10,&flg)); 105 if (!flg) CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"Error in MatMult\n")); 106 #if !defined(PETSC_USE_COMPLEX) 107 CHKERRQ(MatMultHermitianTransposeEqual(LR,LRe,10,&flg)); 108 if (!flg) CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"Error in MatMultTranspose\n")); 109 #endif 110 111 CHKERRQ(MatDestroy(&A)); 112 CHKERRQ(MatDestroy(&LRe)); 113 CHKERRQ(MatDestroy(&U)); 114 CHKERRQ(MatDestroy(&V)); 115 CHKERRQ(VecDestroy(&c)); 116 CHKERRQ(MatDestroy(&LR)); 117 118 /* 119 Always call PetscFinalize() before exiting a program. This routine 120 - finalizes the PETSc libraries as well as MPI 121 - provides summary and diagnostic information if certain runtime 122 options are chosen (e.g., -log_view). 123 */ 124 ierr = PetscFinalize(); 125 return ierr; 126 } 127 128 /*TEST 129 130 testset: 131 output_file: output/ex102_1.out 132 nsize: {{1 2}} 133 args: -low_rank {{0 1}} -use_c {{0 1}} 134 test: 135 suffix: standard 136 test: 137 suffix: cuda 138 requires: cuda 139 args: -A_mat_type aijcusparse -U_mat_type densecuda -V_mat_type densecuda 140 141 TEST*/ 142