1*c080761bSJose E. Roman static char help[] = "Tests MatMeshToCellGraph()\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown /* 4c4762a1bSJed Brown Include "petscmat.h" so that we can use matrices. 5c4762a1bSJed Brown automatically includes: 6c4762a1bSJed Brown petscsys.h - base PETSc routines petscvec.h - vectors 7c4762a1bSJed Brown petscmat.h - matrices 8c4762a1bSJed Brown petscis.h - index sets petscviewer.h - viewers 9c4762a1bSJed Brown */ 10c4762a1bSJed Brown #include <petscmat.h> 11c4762a1bSJed Brown 12d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 13d71ae5a4SJacob Faibussowitsch { 14c4762a1bSJed Brown Mat mesh, dual; 15c4762a1bSJed Brown PetscInt Nvertices = 6; /* total number of vertices */ 16c4762a1bSJed Brown PetscInt ncells = 2; /* number cells on this process */ 17c4762a1bSJed Brown PetscInt *ii, *jj; 18c4762a1bSJed Brown PetscMPIInt size, rank; 19c4762a1bSJed Brown MatPartitioning part; 20c4762a1bSJed Brown IS is; 21c4762a1bSJed Brown 22327415f7SBarry Smith PetscFunctionBeginUser; 23c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &args, NULL, help)); 249566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(MPI_COMM_WORLD, &size)); 25be096a46SBarry Smith PetscCheck(size == 2, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "This example is for exactly two processes"); 269566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(MPI_COMM_WORLD, &rank)); 27c4762a1bSJed Brown 289566063dSJacob Faibussowitsch PetscCall(PetscMalloc1(3, &ii)); 299566063dSJacob Faibussowitsch PetscCall(PetscMalloc1(6, &jj)); 309371c9d4SSatish Balay ii[0] = 0; 319371c9d4SSatish Balay ii[1] = 3; 329371c9d4SSatish Balay ii[2] = 6; 33dd400576SPatrick Sanan if (rank == 0) { 349371c9d4SSatish Balay jj[0] = 0; 359371c9d4SSatish Balay jj[1] = 1; 369371c9d4SSatish Balay jj[2] = 2; 379371c9d4SSatish Balay jj[3] = 1; 389371c9d4SSatish Balay jj[4] = 2; 399371c9d4SSatish Balay jj[5] = 3; 40c4762a1bSJed Brown } else { 419371c9d4SSatish Balay jj[0] = 1; 429371c9d4SSatish Balay jj[1] = 4; 439371c9d4SSatish Balay jj[2] = 5; 449371c9d4SSatish Balay jj[3] = 1; 459371c9d4SSatish Balay jj[4] = 3; 469371c9d4SSatish Balay jj[5] = 5; 47c4762a1bSJed Brown } 489566063dSJacob Faibussowitsch PetscCall(MatCreateMPIAdj(MPI_COMM_WORLD, ncells, Nvertices, ii, jj, NULL, &mesh)); 499566063dSJacob Faibussowitsch PetscCall(MatMeshToCellGraph(mesh, 2, &dual)); 509566063dSJacob Faibussowitsch PetscCall(MatView(dual, PETSC_VIEWER_STDOUT_WORLD)); 51c4762a1bSJed Brown 529566063dSJacob Faibussowitsch PetscCall(MatPartitioningCreate(MPI_COMM_WORLD, &part)); 539566063dSJacob Faibussowitsch PetscCall(MatPartitioningSetAdjacency(part, dual)); 549566063dSJacob Faibussowitsch PetscCall(MatPartitioningSetFromOptions(part)); 559566063dSJacob Faibussowitsch PetscCall(MatPartitioningApply(part, &is)); 569566063dSJacob Faibussowitsch PetscCall(ISView(is, PETSC_VIEWER_STDOUT_WORLD)); 579566063dSJacob Faibussowitsch PetscCall(ISDestroy(&is)); 589566063dSJacob Faibussowitsch PetscCall(MatPartitioningDestroy(&part)); 59c4762a1bSJed Brown 609566063dSJacob Faibussowitsch PetscCall(MatDestroy(&mesh)); 619566063dSJacob Faibussowitsch PetscCall(MatDestroy(&dual)); 629566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 63b122ec5aSJacob Faibussowitsch return 0; 64c4762a1bSJed Brown } 65c4762a1bSJed Brown 66c4762a1bSJed Brown /*TEST 67c4762a1bSJed Brown 68c4762a1bSJed Brown build: 69c4762a1bSJed Brown requires: parmetis 70c4762a1bSJed Brown 71c4762a1bSJed Brown test: 72c4762a1bSJed Brown nsize: 2 73c4762a1bSJed Brown 74c4762a1bSJed Brown TEST*/ 75