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; 129566063dSJacob Faibussowitsch PetscCall(MatGetSize(A,&M,NULL)); 139566063dSJacob Faibussowitsch PetscCall(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) { 189566063dSJacob Faibussowitsch PetscCall(MatSetValues(A,1,&i,1,&j,&dummy,INSERT_VALUES)); 19c4762a1bSJed Brown } 20c4762a1bSJed Brown } 21c4762a1bSJed Brown } 229566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 239566063dSJacob Faibussowitsch PetscCall(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*327415f7SBarry Smith PetscFunctionBeginUser; 369566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 379566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 38c4762a1bSJed Brown 399566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&J)); 409566063dSJacob Faibussowitsch PetscCall(MatSetSizes(J, PETSC_DECIDE, PETSC_DECIDE, M, M)); 419566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(J)); 429566063dSJacob Faibussowitsch PetscCall(MatSetUp(J)); 43c4762a1bSJed Brown 449566063dSJacob Faibussowitsch PetscCall(FormJacobian(J)); 459566063dSJacob Faibussowitsch PetscCall(MatView(J,PETSC_VIEWER_STDOUT_WORLD)); 46c4762a1bSJed Brown 47c4762a1bSJed Brown /* 48c4762a1bSJed Brown Color the matrix, i.e. determine groups of columns that share no common 49c4762a1bSJed Brown rows. These columns in the Jacobian can all be computed simultaneously. 50c4762a1bSJed Brown */ 519566063dSJacob Faibussowitsch PetscCall(MatColoringCreate(J, &coloring)); 529566063dSJacob Faibussowitsch PetscCall(MatColoringSetType(coloring,MATCOLORINGGREEDY)); 539566063dSJacob Faibussowitsch PetscCall(MatColoringSetFromOptions(coloring)); 549566063dSJacob Faibussowitsch PetscCall(MatColoringApply(coloring, &iscoloring)); 55c4762a1bSJed Brown 56c4762a1bSJed Brown if (size == 1) { 579566063dSJacob Faibussowitsch PetscCall(MatISColoringTest(J,iscoloring)); 58c4762a1bSJed Brown } 59c4762a1bSJed Brown 609566063dSJacob Faibussowitsch PetscCall(ISColoringDestroy(&iscoloring)); 619566063dSJacob Faibussowitsch PetscCall(MatColoringDestroy(&coloring)); 629566063dSJacob Faibussowitsch PetscCall(MatDestroy(&J)); 639566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 64b122ec5aSJacob Faibussowitsch return 0; 65c4762a1bSJed Brown } 66c4762a1bSJed Brown 67c4762a1bSJed Brown /*TEST 68c4762a1bSJed Brown 69c4762a1bSJed Brown test: 70c4762a1bSJed Brown suffix: sl 71dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 72c4762a1bSJed Brown args: -mat_coloring_type sl 73c4762a1bSJed Brown output_file: output/ex24_1.out 74c4762a1bSJed Brown 75c4762a1bSJed Brown test: 76c4762a1bSJed Brown suffix: lf 77dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 78c4762a1bSJed Brown args: -mat_coloring_type lf 79c4762a1bSJed Brown output_file: output/ex24_1.out 80c4762a1bSJed Brown 81c4762a1bSJed Brown test: 82c4762a1bSJed Brown suffix: id 83dfd57a17SPierre Jolivet requires: !complex double !defined(PETSC_USE_64BIT_INDICES) 84c4762a1bSJed Brown args: -mat_coloring_type id 85c4762a1bSJed Brown output_file: output/ex24_1.out 86c4762a1bSJed Brown 87c4762a1bSJed Brown TEST*/ 88