1 static char help[] = "Tests MAIJ matrix for large DOF\n\n"; 2 3 #include <petscdm.h> 4 #include <petscdmda.h> 5 6 int main(int argc,char *argv[]) 7 { 8 Mat M; 9 Vec x,y; 10 DM da,daf; 11 12 PetscCall(PetscInitialize(&argc,&argv,0,help)); 13 PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE,DMDA_STENCIL_STAR,4,5,PETSC_DECIDE,PETSC_DECIDE,41,1,0,0,&da)); 14 PetscCall(DMSetFromOptions(da)); 15 PetscCall(DMSetUp(da)); 16 PetscCall(DMRefine(da,PETSC_COMM_WORLD,&daf)); 17 PetscCall(DMCreateInterpolation(da,daf,&M,NULL)); 18 PetscCall(DMCreateGlobalVector(da,&x)); 19 PetscCall(DMCreateGlobalVector(daf,&y)); 20 21 PetscCall(MatMult(M,x,y)); 22 PetscCall(MatMultTranspose(M,y,x)); 23 PetscCall(DMDestroy(&da)); 24 PetscCall(DMDestroy(&daf)); 25 PetscCall(VecDestroy(&x)); 26 PetscCall(VecDestroy(&y)); 27 PetscCall(MatDestroy(&M)); 28 PetscCall(PetscFinalize()); 29 return 0; 30 } 31 32 /*TEST 33 34 test: 35 nsize: 2 36 37 TEST*/ 38