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 PetscInt M,ownbegin,ownend,i,j; 9c4762a1bSJed Brown PetscScalar dummy=0.0; 10c4762a1bSJed Brown 11c4762a1bSJed Brown PetscFunctionBeginUser; 125f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetSize(A,&M,NULL)); 135f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetOwnershipRange(A,&ownbegin,&ownend)); 14c4762a1bSJed Brown 15c4762a1bSJed Brown for (i=ownbegin; i<ownend; i++) { 16c4762a1bSJed Brown for (j=i-3; j<i+3; j++) { 17c4762a1bSJed Brown if (j >= 0 && j < M) { 185f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(A,1,&i,1,&j,&dummy,INSERT_VALUES)); 19c4762a1bSJed Brown } 20c4762a1bSJed Brown } 21c4762a1bSJed Brown } 225f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 235f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 24c4762a1bSJed Brown PetscFunctionReturn(0); 25c4762a1bSJed Brown } 26c4762a1bSJed Brown 27c4762a1bSJed Brown int main(int argc, char *argv[]) 28c4762a1bSJed Brown { 29c4762a1bSJed Brown Mat J; 30c4762a1bSJed Brown PetscMPIInt size; 31c4762a1bSJed Brown PetscInt M=8; 32c4762a1bSJed Brown ISColoring iscoloring; 33c4762a1bSJed Brown MatColoring coloring; 34c4762a1bSJed Brown 35*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&argv,(char*)0,help)); 365f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 37c4762a1bSJed Brown 385f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&J)); 395f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(J, PETSC_DECIDE, PETSC_DECIDE, M, M)); 405f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetFromOptions(J)); 415f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetUp(J)); 42c4762a1bSJed Brown 435f80ce2aSJacob Faibussowitsch CHKERRQ(FormJacobian(J)); 445f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(J,PETSC_VIEWER_STDOUT_WORLD)); 45c4762a1bSJed Brown 46c4762a1bSJed Brown /* 47c4762a1bSJed Brown Color the matrix, i.e. determine groups of columns that share no common 48c4762a1bSJed Brown rows. These columns in the Jacobian can all be computed simultaneously. 49c4762a1bSJed Brown */ 505f80ce2aSJacob Faibussowitsch CHKERRQ(MatColoringCreate(J, &coloring)); 515f80ce2aSJacob Faibussowitsch CHKERRQ(MatColoringSetType(coloring,MATCOLORINGGREEDY)); 525f80ce2aSJacob Faibussowitsch CHKERRQ(MatColoringSetFromOptions(coloring)); 535f80ce2aSJacob Faibussowitsch CHKERRQ(MatColoringApply(coloring, &iscoloring)); 54c4762a1bSJed Brown 55c4762a1bSJed Brown if (size == 1) { 565f80ce2aSJacob Faibussowitsch CHKERRQ(MatISColoringTest(J,iscoloring)); 57c4762a1bSJed Brown } 58c4762a1bSJed Brown 595f80ce2aSJacob Faibussowitsch CHKERRQ(ISColoringDestroy(&iscoloring)); 605f80ce2aSJacob Faibussowitsch CHKERRQ(MatColoringDestroy(&coloring)); 615f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&J)); 62*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 63*b122ec5aSJacob Faibussowitsch return 0; 64c4762a1bSJed Brown } 65c4762a1bSJed Brown 66c4762a1bSJed Brown /*TEST 67c4762a1bSJed Brown 68c4762a1bSJed Brown test: 69c4762a1bSJed Brown suffix: sl 70dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 71c4762a1bSJed Brown args: -mat_coloring_type sl 72c4762a1bSJed Brown output_file: output/ex24_1.out 73c4762a1bSJed Brown 74c4762a1bSJed Brown test: 75c4762a1bSJed Brown suffix: lf 76dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 77c4762a1bSJed Brown args: -mat_coloring_type lf 78c4762a1bSJed Brown output_file: output/ex24_1.out 79c4762a1bSJed Brown 80c4762a1bSJed Brown test: 81c4762a1bSJed Brown suffix: id 82dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 83c4762a1bSJed Brown args: -mat_coloring_type id 84c4762a1bSJed Brown output_file: output/ex24_1.out 85c4762a1bSJed Brown 86c4762a1bSJed Brown TEST*/ 87