1 2 static char help[] = "Tests MatPtAP() \n"; 3 4 #include <petscmat.h> 5 6 /* 7 * This is an extremely simple example to test MatPtAP. It is very useful when developing and debugging the code. 8 * 9 * A = 10 11 1 2 0 4 12 0 1 2 0 13 2 0 4 0 14 0 1 2 1 15 * 16 * 17 * 18 * P = 19 20 1.00000 0.00000 21 0.30000 0.50000 22 0.00000 0.80000 23 0.90000 0.00000 24 * 25 * 26 *AP = 27 * 28 * 5.20000 1.00000 29 0.30000 2.10000 30 2.00000 3.20000 31 1.20000 2.10000 32 * 33 * PT = 34 35 1.00000 0.30000 0.00000 0.90000 36 0.00000 0.50000 0.80000 0.00000 37 38 * 39 * C = 40 41 6.3700 3.5200 42 1.7500 3.6100 43 * 44 * */ 45 46 int main(int argc, char **argv) { 47 Mat A, P, PtAP; 48 PetscInt i1[] = {0, 3, 5}, i2[] = {0, 2, 5}; 49 PetscInt j1[] = {0, 1, 3, 1, 2}, j2[] = {0, 2, 1, 2, 3}; 50 PetscScalar a1[] = {1, 2, 4, 1, 2}, a2[] = {2, 4, 1, 2, 1}; 51 PetscInt pi1[] = {0, 1, 3}, pi2[] = {0, 1, 2}; 52 PetscInt pj1[] = {0, 0, 1}, pj2[] = {1, 0}; 53 PetscScalar pa1[] = {1, 0.3, 0.5}, pa2[] = {0.8, 0.9}; 54 MPI_Comm comm; 55 PetscMPIInt rank, size; 56 57 PetscFunctionBeginUser; 58 PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 59 comm = PETSC_COMM_WORLD; 60 PetscCallMPI(MPI_Comm_rank(comm, &rank)); 61 PetscCallMPI(MPI_Comm_size(comm, &size)); 62 PetscCheck(size == 2, comm, PETSC_ERR_WRONG_MPI_SIZE, "You have to use two processor cores to run this example "); 63 PetscCall(MatCreateMPIAIJWithArrays(comm, 2, 2, PETSC_DETERMINE, PETSC_DETERMINE, rank ? i2 : i1, rank ? j2 : j1, rank ? a2 : a1, &A)); 64 PetscCall(MatCreateMPIAIJWithArrays(comm, 2, 1, PETSC_DETERMINE, PETSC_DETERMINE, rank ? pi2 : pi1, rank ? pj2 : pj1, rank ? pa2 : pa1, &P)); 65 PetscCall(MatPtAP(A, P, MAT_INITIAL_MATRIX, 1.1, &PtAP)); 66 PetscCall(MatView(A, NULL)); 67 PetscCall(MatView(P, NULL)); 68 PetscCall(MatView(PtAP, NULL)); 69 PetscCall(MatPtAP(A, P, MAT_REUSE_MATRIX, 1.1, &PtAP)); 70 PetscCall(MatView(A, NULL)); 71 PetscCall(MatView(P, NULL)); 72 PetscCall(MatView(PtAP, NULL)); 73 PetscCall(MatDestroy(&A)); 74 PetscCall(MatDestroy(&P)); 75 PetscCall(MatDestroy(&PtAP)); 76 PetscCall(PetscFinalize()); 77 return 0; 78 } 79 80 /*TEST 81 test: 82 nsize: 2 83 args: -matptap_via allatonce 84 output_file: output/ex90_1.out 85 86 test: 87 nsize: 2 88 suffix: merged 89 args: -matptap_via allatonce_merged 90 output_file: output/ex90_1.out 91 92 TEST*/ 93