1c4762a1bSJed Brown#include <petsc/finclude/petscmat.h> 2*c5e229c2SMartin Diehlprogram main 3c4762a1bSJed Brown use petscmat 4c4762a1bSJed Brown 5c4762a1bSJed Brown implicit none 6c4762a1bSJed Brown 7c4762a1bSJed Brown Mat :: A 8c4762a1bSJed Brown MatPartitioning :: part 9c4762a1bSJed Brown IS :: is 10c4762a1bSJed Brown PetscInt :: r, myStart, myEnd 11c4762a1bSJed Brown PetscInt :: N = 10 12c4762a1bSJed Brown PetscErrorCode :: ierr 13c4762a1bSJed Brown PetscScalar, pointer, dimension(:) :: vals 14c4762a1bSJed Brown PetscInt, pointer, dimension(:) :: cols 15c4762a1bSJed Brown PetscBool :: flg 16c4762a1bSJed Brown PetscInt, parameter :: one = 1, two = 2, three = 3 17c4762a1bSJed Brown 18d8606c27SBarry Smith PetscCallA(PetscInitialize(ierr)) 19c4762a1bSJed Brown 20dcb3e689SBarry Smith PetscCallA(PetscOptionsGetInt(PETSC_NULL_OPTIONS, PETSC_NULL_CHARACTER, '-N', N, flg, ierr)) 21d8606c27SBarry Smith PetscCallA(MatCreate(PETSC_COMM_WORLD, A, ierr)) 22d8606c27SBarry Smith PetscCallA(MatSetSizes(A, PETSC_DECIDE, PETSC_DECIDE, N, N, ierr)) 23d8606c27SBarry Smith PetscCallA(MatSetFromOptions(A, ierr)) 245d83a8b1SBarry Smith PetscCallA(MatSeqAIJSetPreallocation(A, three, PETSC_NULL_INTEGER_ARRAY, ierr)) 255d83a8b1SBarry Smith PetscCallA(MatMPIAIJSetPreallocation(A, three, PETSC_NULL_INTEGER_ARRAY, two, PETSC_NULL_INTEGER_ARRAY, ierr)) 26c4762a1bSJed Brown 27c4762a1bSJed Brown !/* Create a linear mesh */ 28d8606c27SBarry Smith PetscCallA(MatGetOwnershipRange(A, myStart, myEnd, ierr)) 29c4762a1bSJed Brown 30c4762a1bSJed Brown do r = myStart, myEnd - 1 31c4762a1bSJed Brown if (r == 0) then 32c4762a1bSJed Brown allocate (vals(2)) 33c4762a1bSJed Brown vals = 1.0 34c4762a1bSJed Brown allocate (cols(2), source=[r, r + 1]) 355d83a8b1SBarry Smith PetscCallA(MatSetValues(A, one, [r], two, cols, vals, INSERT_VALUES, ierr)) 36c4762a1bSJed Brown deallocate (cols) 37c4762a1bSJed Brown deallocate (vals) 38c4762a1bSJed Brown else if (r == N - 1) then 39c4762a1bSJed Brown allocate (vals(2)) 40c4762a1bSJed Brown vals = 1.0 41c4762a1bSJed Brown allocate (cols(2), source=[r - 1, r]) 425d83a8b1SBarry Smith PetscCallA(MatSetValues(A, one, [r], two, cols, vals, INSERT_VALUES, ierr)) 43c4762a1bSJed Brown deallocate (cols) 44c4762a1bSJed Brown deallocate (vals) 45c4762a1bSJed Brown else 46c4762a1bSJed Brown allocate (vals(3)) 47c4762a1bSJed Brown vals = 1.0 48c4762a1bSJed Brown allocate (cols(3), source=[r - 1, r, r + 1]) 495d83a8b1SBarry Smith PetscCallA(MatSetValues(A, one, [r], three, cols, vals, INSERT_VALUES, ierr)) 50c4762a1bSJed Brown deallocate (cols) 51c4762a1bSJed Brown deallocate (vals) 52c4762a1bSJed Brown end if 53c4762a1bSJed Brown end do 54d8606c27SBarry Smith PetscCallA(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY, ierr)) 55d8606c27SBarry Smith PetscCallA(MatAssemblyend(A, MAT_FINAL_ASSEMBLY, ierr)) 56d8606c27SBarry Smith PetscCallA(MatPartitioningCreate(PETSC_COMM_WORLD, part, ierr)) 57d8606c27SBarry Smith PetscCallA(MatPartitioningSetAdjacency(part, A, ierr)) 58d8606c27SBarry Smith PetscCallA(MatPartitioningSetFromOptions(part, ierr)) 59d8606c27SBarry Smith PetscCallA(MatPartitioningApply(part, is, ierr)) 60d8606c27SBarry Smith PetscCallA(ISView(is, PETSC_VIEWER_STDOUT_WORLD, ierr)) 61d8606c27SBarry Smith PetscCallA(ISDestroy(is, ierr)) 62d8606c27SBarry Smith PetscCallA(MatPartitioningDestroy(part, ierr)) 63d8606c27SBarry Smith PetscCallA(MatDestroy(A, ierr)) 64d8606c27SBarry Smith PetscCallA(PetscFinalize(ierr)) 65c4762a1bSJed Brown 66c4762a1bSJed Brownend program 67c4762a1bSJed Brown 68c4762a1bSJed Brown!/*TEST 69c4762a1bSJed Brown! 70c4762a1bSJed Brown! test: 71c4762a1bSJed Brown! nsize: 3 72c4762a1bSJed Brown! requires: parmetis 73c4762a1bSJed Brown! args: -mat_partitioning_type parmetis 74c4762a1bSJed Brown! output_file: output/ex15_1.out 75c4762a1bSJed Brown! 76c4762a1bSJed Brown! test: 77c4762a1bSJed Brown! suffix: 2 78c4762a1bSJed Brown! nsize: 3 79c4762a1bSJed Brown! requires: ptscotch 80c4762a1bSJed Brown! args: -mat_partitioning_type ptscotch 81c4762a1bSJed Brown! output_file: output/ex15_2.out 82c4762a1bSJed Brown! 83c4762a1bSJed Brown! test: 84c4762a1bSJed Brown! suffix: 3 85c4762a1bSJed Brown! nsize: 4 86c4762a1bSJed Brown! requires: party 87c4762a1bSJed Brown! args: -mat_partitioning_type party 88c4762a1bSJed Brown! output_file: output/ex15_3.out 89c4762a1bSJed Brown! 90c4762a1bSJed Brown! test: 91c4762a1bSJed Brown! suffix: 4 92c4762a1bSJed Brown! nsize: 3 93c4762a1bSJed Brown! requires: chaco 94c4762a1bSJed Brown! args: -mat_partitioning_type chaco 95c4762a1bSJed Brown! output_file: output/ex15_4.out 96c4762a1bSJed Brown! 97c4762a1bSJed Brown! test: 98c4762a1bSJed Brown! suffix: 5 99c4762a1bSJed Brown! nsize: 3 100c4762a1bSJed Brown! requires: parmetis 101c4762a1bSJed Brown! args: -mat_partitioning_type hierarch -mat_partitioning_hierarchical_nfineparts 3 -mat_partitioning_nparts 10 -N 100 102c4762a1bSJed Brown! output_file: output/ex15_5.out 103c4762a1bSJed Brown! 104c4762a1bSJed Brown!TEST*/ 105