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 PetscErrorCode ierr; 11c4762a1bSJed Brown PetscMPIInt rank,size; 12c4762a1bSJed Brown PetscScalar v; 13c4762a1bSJed Brown 14c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 15*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 16*5f80ce2aSJacob Faibussowitsch CHKERRMPI(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*/ 20*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&C)); 21*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 22*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetFromOptions(C)); 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(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; 27*5f80ce2aSJacob Faibussowitsch if (i>0) {J = Ii - n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 28*5f80ce2aSJacob Faibussowitsch if (i<m-1) {J = Ii + n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 29*5f80ce2aSJacob Faibussowitsch if (j>0) {J = Ii - 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 30*5f80ce2aSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 31*5f80ce2aSJacob Faibussowitsch v = 4.0; CHKERRQ(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 32c4762a1bSJed Brown } 33c4762a1bSJed Brown } 34*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(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; 39*5f80ce2aSJacob Faibussowitsch if (i>0) {J = Ii - n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 40*5f80ce2aSJacob Faibussowitsch if (i<m-1) {J = Ii + n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 41*5f80ce2aSJacob Faibussowitsch if (j>0) {J = Ii - 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 42*5f80ce2aSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 43*5f80ce2aSJacob Faibussowitsch v = -4.0; CHKERRQ(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 44c4762a1bSJed Brown } 45c4762a1bSJed Brown } 46*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 47*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 48c4762a1bSJed Brown 49*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 50c4762a1bSJed Brown 51*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&C)); 52c4762a1bSJed Brown ierr = PetscFinalize(); 53c4762a1bSJed Brown return ierr; 54c4762a1bSJed Brown } 55c4762a1bSJed Brown 56c4762a1bSJed Brown /*TEST 57c4762a1bSJed Brown 58c4762a1bSJed Brown test: 59c4762a1bSJed Brown 60c4762a1bSJed Brown TEST*/ 61