1 static char help[] = "Test HDF5 input and output.\n\ 2 This exposed a bug with sharing discretizations.\n\n\n"; 3 4 #include <petscdmforest.h> 5 #include <petscdmplex.h> 6 #include <petscviewerhdf5.h> 7 8 int main (int argc, char **argv) 9 { 10 11 DM base, forest, plex; 12 Vec g, g2; 13 PetscSection s; 14 PetscViewer viewer; 15 PetscReal diff; 16 PetscInt min_refine = 2, overlap = 0; 17 PetscInt vStart, vEnd, v; 18 19 PetscFunctionBeginUser; 20 PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 21 22 PetscCall(DMCreate(PETSC_COMM_WORLD, &base)); 23 PetscCall(DMSetType(base, DMPLEX)); 24 PetscCall(DMSetFromOptions(base)); 25 26 PetscCall(DMCreate(PETSC_COMM_WORLD, &forest)); 27 PetscCall(DMSetType(forest, DMP4EST)); 28 PetscCall(DMForestSetBaseDM(forest, base)); 29 PetscCall(DMForestSetInitialRefinement(forest, min_refine)); 30 PetscCall(DMForestSetPartitionOverlap(forest, overlap)); 31 PetscCall(DMSetUp(forest)); 32 PetscCall(DMDestroy(&base)); 33 PetscCall(DMViewFromOptions(forest, NULL, "-dm_view")); 34 35 PetscCall(DMConvert(forest, DMPLEX, &plex)); 36 PetscCall(DMPlexGetDepthStratum(plex, 0, &vStart, &vEnd)); 37 PetscCall(DMDestroy(&plex)); 38 PetscCall(PetscSectionCreate(PetscObjectComm((PetscObject) forest), &s)); 39 PetscCall(PetscSectionSetChart(s, vStart, vEnd)); 40 for (v = vStart; v < vEnd; ++v) PetscCall(PetscSectionSetDof(s, v, 1)); 41 PetscCall(PetscSectionSetUp(s)); 42 PetscCall(DMSetLocalSection(forest, s)); 43 PetscCall(PetscSectionDestroy(&s)); 44 45 PetscCall(DMCreateGlobalVector(forest, &g)); 46 PetscCall(PetscObjectSetName((PetscObject) g, "g")); 47 PetscCall(VecSet(g, 1.0)); 48 PetscCall(PetscViewerHDF5Open(PETSC_COMM_WORLD, "forest.h5", FILE_MODE_WRITE, &viewer)); 49 PetscCall(VecView(g, viewer)); 50 PetscCall(PetscViewerDestroy(&viewer)); 51 52 PetscCall(DMCreateGlobalVector(forest, &g2)); 53 PetscCall(PetscObjectSetName((PetscObject) g2, "g")); 54 PetscCall(PetscViewerHDF5Open(PETSC_COMM_WORLD, "forest.h5", FILE_MODE_READ, &viewer)); 55 PetscCall(VecLoad(g2, viewer)); 56 PetscCall(PetscViewerDestroy(&viewer)); 57 58 /* Check if the data is the same*/ 59 PetscCall(VecAXPY(g2, -1.0, g)); 60 PetscCall(VecNorm(g2, NORM_INFINITY, &diff)); 61 if (diff > PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Check failed: %g\n", (double) diff)); 62 63 PetscCall(VecDestroy(&g)); 64 PetscCall(VecDestroy(&g2)); 65 PetscCall(DMDestroy(&forest)); 66 PetscCall(PetscFinalize()); 67 return 0; 68 } 69 70 /*TEST 71 72 build: 73 requires: hdf5 p4est 74 75 test: 76 args: -dm_plex_simplex 0 -dm_plex_box_faces 3,3 77 78 TEST*/ 79