1 /* -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-. 2 3 Detected bug in DMCreateMatrix() for skinny domains with periodic boundary conditions in overestimating nonzero preallocation 4 5 Creation Date : 08-12-2016 6 7 Last Modified : Thu 08 Dec 2016 10:46:02 AM CET 8 9 Created By : Davide Monsorno 10 11 _._._._._._._._._._._._._._._._._._._._._.*/ 12 13 #include <petscdmda.h> 14 15 int main(int argc, char *argv[]) 16 { 17 PetscErrorCode ierr; 18 PetscInt nx = 2; 19 PetscInt ny = 2; 20 PetscInt nz = 128; 21 DM da; 22 Mat A; 23 24 PetscCall(PetscInitialize(&argc,&argv,NULL,NULL)); 25 26 ierr = DMDACreate3d(PETSC_COMM_WORLD,DM_BOUNDARY_PERIODIC,DM_BOUNDARY_PERIODIC,DM_BOUNDARY_GHOSTED,DMDA_STENCIL_BOX,nx,ny,nz, 27 PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,1,2,NULL,NULL,NULL,&da);PetscCall(ierr); 28 29 PetscCall(DMSetFromOptions(da)); 30 PetscCall(DMSetUp(da)); 31 PetscCall(DMView(da,PETSC_VIEWER_STDOUT_WORLD)); 32 PetscCall(DMCreateMatrix(da,&A)); 33 34 PetscCall(MatDestroy(&A)); 35 PetscCall(DMDestroy(&da)); 36 PetscCall(PetscFinalize()); 37 return 0; 38 } 39 40 /*TEST 41 42 test: 43 nsize: 5 44 45 TEST*/ 46