1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests the different MatColoring implementatons and ISColoringTestValid() \n\ 3c4762a1bSJed Brown Modifed from the code contributed by Ali Berk Kahraman. \n\n"; 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown PetscErrorCode FormJacobian(Mat A) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown PetscErrorCode ierr; 9c4762a1bSJed Brown PetscInt M,ownbegin,ownend,i,j; 10c4762a1bSJed Brown PetscScalar dummy=0.0; 11c4762a1bSJed Brown 12c4762a1bSJed Brown PetscFunctionBeginUser; 13c4762a1bSJed Brown ierr = MatGetSize(A,&M,NULL);CHKERRQ(ierr); 14c4762a1bSJed Brown ierr = MatGetOwnershipRange(A,&ownbegin,&ownend);CHKERRQ(ierr); 15c4762a1bSJed Brown 16c4762a1bSJed Brown for (i=ownbegin; i<ownend; i++) { 17c4762a1bSJed Brown for (j=i-3; j<i+3; j++) { 18c4762a1bSJed Brown if (j >= 0 && j < M) { 19c4762a1bSJed Brown ierr = MatSetValues(A,1,&i,1,&j,&dummy,INSERT_VALUES);CHKERRQ(ierr); 20c4762a1bSJed Brown } 21c4762a1bSJed Brown } 22c4762a1bSJed Brown } 23c4762a1bSJed Brown ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 24c4762a1bSJed Brown ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 25c4762a1bSJed Brown PetscFunctionReturn(0); 26c4762a1bSJed Brown } 27c4762a1bSJed Brown 28c4762a1bSJed Brown int main(int argc, char *argv[]) 29c4762a1bSJed Brown { 30c4762a1bSJed Brown PetscErrorCode ierr; 31c4762a1bSJed Brown Mat J; 32c4762a1bSJed Brown PetscMPIInt size; 33c4762a1bSJed Brown PetscInt M=8; 34c4762a1bSJed Brown ISColoring iscoloring; 35c4762a1bSJed Brown MatColoring coloring; 36c4762a1bSJed Brown 37c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 38ffc4695bSBarry Smith ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRMPI(ierr); 39c4762a1bSJed Brown 40c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&J);CHKERRQ(ierr); 41c4762a1bSJed Brown ierr = MatSetSizes(J, PETSC_DECIDE, PETSC_DECIDE, M, M);CHKERRQ(ierr); 42c4762a1bSJed Brown ierr = MatSetFromOptions(J);CHKERRQ(ierr); 43c4762a1bSJed Brown ierr = MatSetUp(J);CHKERRQ(ierr); 44c4762a1bSJed Brown 45c4762a1bSJed Brown ierr = FormJacobian(J);CHKERRQ(ierr); 46c4762a1bSJed Brown ierr = MatView(J,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 47c4762a1bSJed Brown 48c4762a1bSJed Brown /* 49c4762a1bSJed Brown Color the matrix, i.e. determine groups of columns that share no common 50c4762a1bSJed Brown rows. These columns in the Jacobian can all be computed simultaneously. 51c4762a1bSJed Brown */ 52c4762a1bSJed Brown ierr = MatColoringCreate(J, &coloring);CHKERRQ(ierr); 53c4762a1bSJed Brown ierr = MatColoringSetType(coloring,MATCOLORINGGREEDY);CHKERRQ(ierr); 54c4762a1bSJed Brown ierr = MatColoringSetFromOptions(coloring);CHKERRQ(ierr); 55c4762a1bSJed Brown ierr = MatColoringApply(coloring, &iscoloring);CHKERRQ(ierr); 56c4762a1bSJed Brown 57c4762a1bSJed Brown if (size == 1) { 58c4762a1bSJed Brown ierr = MatISColoringTest(J,iscoloring);CHKERRQ(ierr); 59c4762a1bSJed Brown } 60c4762a1bSJed Brown 61c4762a1bSJed Brown ierr = ISColoringDestroy(&iscoloring);CHKERRQ(ierr); 62c4762a1bSJed Brown ierr = MatColoringDestroy(&coloring);CHKERRQ(ierr); 63c4762a1bSJed Brown ierr = MatDestroy(&J);CHKERRQ(ierr); 64c4762a1bSJed Brown ierr = PetscFinalize(); 65c4762a1bSJed Brown return ierr; 66c4762a1bSJed Brown } 67c4762a1bSJed Brown 68c4762a1bSJed Brown /*TEST 69c4762a1bSJed Brown 70c4762a1bSJed Brown test: 71c4762a1bSJed Brown suffix: sl 72*dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 73c4762a1bSJed Brown args: -mat_coloring_type sl 74c4762a1bSJed Brown output_file: output/ex24_1.out 75c4762a1bSJed Brown 76c4762a1bSJed Brown test: 77c4762a1bSJed Brown suffix: lf 78*dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 79c4762a1bSJed Brown args: -mat_coloring_type lf 80c4762a1bSJed Brown output_file: output/ex24_1.out 81c4762a1bSJed Brown 82c4762a1bSJed Brown test: 83c4762a1bSJed Brown suffix: id 84*dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 85c4762a1bSJed Brown args: -mat_coloring_type id 86c4762a1bSJed Brown output_file: output/ex24_1.out 87c4762a1bSJed Brown 88c4762a1bSJed Brown TEST*/ 89