1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests repeated use of assembly for matrices.\n\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown #include <petscmat.h> 5*c4762a1bSJed Brown 6*c4762a1bSJed Brown int main(int argc,char **args) 7*c4762a1bSJed Brown { 8*c4762a1bSJed Brown Mat C; 9*c4762a1bSJed Brown PetscInt i,j,m = 5,n = 2,Ii,J; 10*c4762a1bSJed Brown PetscErrorCode ierr; 11*c4762a1bSJed Brown PetscMPIInt rank,size; 12*c4762a1bSJed Brown PetscScalar v; 13*c4762a1bSJed Brown 14*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 15*c4762a1bSJed Brown ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr); 16*c4762a1bSJed Brown ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr); 17*c4762a1bSJed Brown n = 2*size; 18*c4762a1bSJed Brown 19*c4762a1bSJed Brown /* create the matrix for the five point stencil, YET AGAIN*/ 20*c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&C);CHKERRQ(ierr); 21*c4762a1bSJed Brown ierr = MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n);CHKERRQ(ierr); 22*c4762a1bSJed Brown ierr = MatSetFromOptions(C);CHKERRQ(ierr); 23*c4762a1bSJed Brown ierr = MatSetUp(C);CHKERRQ(ierr); 24*c4762a1bSJed Brown for (i=0; i<m; i++) { 25*c4762a1bSJed Brown for (j=2*rank; j<2*rank+2; j++) { 26*c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 27*c4762a1bSJed Brown if (i>0) {J = Ii - n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 28*c4762a1bSJed Brown if (i<m-1) {J = Ii + n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 29*c4762a1bSJed Brown if (j>0) {J = Ii - 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 30*c4762a1bSJed Brown if (j<n-1) {J = Ii + 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 31*c4762a1bSJed Brown v = 4.0; ierr = MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES);CHKERRQ(ierr); 32*c4762a1bSJed Brown } 33*c4762a1bSJed Brown } 34*c4762a1bSJed Brown ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 36*c4762a1bSJed Brown for (i=0; i<m; i++) { 37*c4762a1bSJed Brown for (j=2*rank; j<2*rank+2; j++) { 38*c4762a1bSJed Brown v = 1.0; Ii = j + n*i; 39*c4762a1bSJed Brown if (i>0) {J = Ii - n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 40*c4762a1bSJed Brown if (i<m-1) {J = Ii + n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 41*c4762a1bSJed Brown if (j>0) {J = Ii - 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 42*c4762a1bSJed Brown if (j<n-1) {J = Ii + 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 43*c4762a1bSJed Brown v = -4.0; ierr = MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES);CHKERRQ(ierr); 44*c4762a1bSJed Brown } 45*c4762a1bSJed Brown } 46*c4762a1bSJed Brown ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 47*c4762a1bSJed Brown ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 48*c4762a1bSJed Brown 49*c4762a1bSJed Brown ierr = MatView(C,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 50*c4762a1bSJed Brown 51*c4762a1bSJed Brown ierr = MatDestroy(&C);CHKERRQ(ierr); 52*c4762a1bSJed Brown ierr = PetscFinalize(); 53*c4762a1bSJed Brown return ierr; 54*c4762a1bSJed Brown } 55*c4762a1bSJed Brown 56*c4762a1bSJed Brown 57*c4762a1bSJed Brown /*TEST 58*c4762a1bSJed Brown 59*c4762a1bSJed Brown test: 60*c4762a1bSJed Brown 61*c4762a1bSJed Brown TEST*/ 62