1 static char help[] = "Tests DMDAVecGetArrayDOF()\n"; 2 #include <petscdm.h> 3 #include <petscdmda.h> 4 5 int main(int argc, char *argv[]) 6 { 7 DM da, daX, daY; 8 DMDALocalInfo info; 9 MPI_Comm commX, commY; 10 Vec basisX, basisY; 11 PetscScalar **arrayX, **arrayY; 12 const PetscInt *lx, *ly; 13 PetscInt M = 3, N = 3; 14 PetscInt p = 1; 15 PetscInt numGP = 3; 16 PetscInt dof = 2*(p+1)*numGP; 17 PetscMPIInt rank, subsize, subrank; 18 19 PetscCall(PetscInitialize(&argc,&argv,0,help)); 20 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 21 /* Create 2D DMDA */ 22 PetscCall(DMDACreate2d(PETSC_COMM_WORLD,DM_BOUNDARY_NONE,DM_BOUNDARY_NONE,DMDA_STENCIL_STAR,M,N,PETSC_DECIDE,PETSC_DECIDE,1,1,NULL,NULL,&da)); 23 PetscCall(DMSetFromOptions(da)); 24 PetscCall(DMSetUp(da)); 25 /* Create 1D DMDAs along two directions. */ 26 PetscCall(DMDAGetOwnershipRanges(da, &lx, &ly, NULL)); 27 PetscCall(DMDAGetLocalInfo(da, &info)); 28 /* Partitioning in the X direction makes a subcomm extending in the Y direction and vice-versa. */ 29 PetscCall(DMDAGetProcessorSubsets(da, DM_X, &commY)); 30 PetscCall(DMDAGetProcessorSubsets(da, DM_Y, &commX)); 31 PetscCallMPI(MPI_Comm_size(commX, &subsize)); 32 PetscCallMPI(MPI_Comm_rank(commX, &subrank)); 33 PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "[%d]X subrank: %d subsize: %d\n", rank, subrank, subsize)); 34 PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT)); 35 PetscCallMPI(MPI_Comm_size(commY, &subsize)); 36 PetscCallMPI(MPI_Comm_rank(commY, &subrank)); 37 PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "[%d]Y subrank: %d subsize: %d\n", rank, subrank, subsize)); 38 PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT)); 39 PetscCall(DMDACreate1d(commX, DM_BOUNDARY_NONE, info.mx, dof, 1, lx, &daX)); 40 PetscCall(DMSetUp(daX)); 41 PetscCall(DMDACreate1d(commY, DM_BOUNDARY_NONE, info.my, dof, 1, ly, &daY)); 42 PetscCall(DMSetUp(daY)); 43 /* Create 1D vectors for basis functions */ 44 PetscCall(DMGetGlobalVector(daX, &basisX)); 45 PetscCall(DMGetGlobalVector(daY, &basisY)); 46 /* Extract basis functions */ 47 PetscCall(DMDAVecGetArrayDOF(daX, basisX, &arrayX)); 48 PetscCall(DMDAVecGetArrayDOF(daY, basisY, &arrayY)); 49 /*arrayX[i][ndof]; */ 50 /*arrayY[j][ndof]; */ 51 PetscCall(DMDAVecRestoreArrayDOF(daX, basisX, &arrayX)); 52 PetscCall(DMDAVecRestoreArrayDOF(daY, basisY, &arrayY)); 53 /* Return basis vectors */ 54 PetscCall(DMRestoreGlobalVector(daX, &basisX)); 55 PetscCall(DMRestoreGlobalVector(daY, &basisY)); 56 /* Cleanup */ 57 PetscCallMPI(MPI_Comm_free(&commX)); 58 PetscCallMPI(MPI_Comm_free(&commY)); 59 PetscCall(DMDestroy(&daX)); 60 PetscCall(DMDestroy(&daY)); 61 PetscCall(DMDestroy(&da)); 62 PetscCall(PetscFinalize()); 63 return 0; 64 } 65 66 /*TEST 67 68 test: 69 nsize: 2 70 71 TEST*/ 72