1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests repeated use of assembly for matrices.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat C; 9c4762a1bSJed Brown PetscInt i,j,m = 5,n = 2,Ii,J; 10c4762a1bSJed Brown PetscMPIInt rank,size; 11c4762a1bSJed Brown PetscScalar v; 12c4762a1bSJed Brown 13*327415f7SBarry Smith PetscFunctionBeginUser; 149566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 159566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 169566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 17c4762a1bSJed Brown n = 2*size; 18c4762a1bSJed Brown 19c4762a1bSJed Brown /* create the matrix for the five point stencil, YET AGAIN*/ 209566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&C)); 219566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 229566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 239566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 24c4762a1bSJed Brown for (i=0; i<m; i++) { 25c4762a1bSJed Brown for (j=2*rank; j<2*rank+2; j++) { 26c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 279566063dSJacob Faibussowitsch if (i>0) {J = Ii - n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 289566063dSJacob Faibussowitsch if (i<m-1) {J = Ii + n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 299566063dSJacob Faibussowitsch if (j>0) {J = Ii - 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 309566063dSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 319566063dSJacob Faibussowitsch v = 4.0; PetscCall(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 32c4762a1bSJed Brown } 33c4762a1bSJed Brown } 349566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 359566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 36c4762a1bSJed Brown for (i=0; i<m; i++) { 37c4762a1bSJed Brown for (j=2*rank; j<2*rank+2; j++) { 38c4762a1bSJed Brown v = 1.0; Ii = j + n*i; 399566063dSJacob Faibussowitsch if (i>0) {J = Ii - n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 409566063dSJacob Faibussowitsch if (i<m-1) {J = Ii + n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 419566063dSJacob Faibussowitsch if (j>0) {J = Ii - 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 429566063dSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 439566063dSJacob Faibussowitsch v = -4.0; PetscCall(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 44c4762a1bSJed Brown } 45c4762a1bSJed Brown } 469566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 479566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 48c4762a1bSJed Brown 499566063dSJacob Faibussowitsch PetscCall(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 50c4762a1bSJed Brown 519566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 529566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 53b122ec5aSJacob Faibussowitsch return 0; 54c4762a1bSJed Brown } 55c4762a1bSJed Brown 56c4762a1bSJed Brown /*TEST 57c4762a1bSJed Brown 58c4762a1bSJed Brown test: 59c4762a1bSJed Brown 60c4762a1bSJed Brown TEST*/ 61