xref: /petsc/src/dm/impls/plex/tests/ex18.c (revision 7a7aea1f13832695eadc2fd5afef8ec0a48c5f75)
1 static char help[] = "Tests for parallel mesh loading and parallel topological interpolation\n\n";
2 
3 #include <petsc/private/dmpleximpl.h>
4 /* List of test meshes
5 
6 Network
7 -------
8 Test 0 (2 ranks):
9 
10 network=0:
11 ---------
12   cell 0   cell 1   cell 2          nCells-1       (edge)
13 0 ------ 1 ------ 2 ------ 3 -- -- v --  -- nCells (vertex)
14 
15   vertex distribution:
16     rank 0: 0 1
17     rank 1: 2 3 ... nCells
18   cell(edge) distribution:
19     rank 0: 0 1
20     rank 1: 2 ... nCells-1
21 
22 network=1:
23 ---------
24                v2
25                 ^
26                 |
27                cell 2
28                 |
29  v0 --cell 0--> v3--cell 1--> v1
30 
31   vertex distribution:
32     rank 0: 0 1 3
33     rank 1: 2
34   cell(edge) distribution:
35     rank 0: 0 1
36     rank 1: 2
37 
38   example:
39     mpiexec -n 2 ./ex18 -distribute 1 -dim 1 -orig_dm_view -dist_dm_view -dist_dm_view -petscpartitioner_type parmetis -ncells 50
40 
41 Triangle
42 --------
43 Test 0 (2 ranks):
44 Two triangles sharing a face
45 
46         2
47       / | \
48      /  |  \
49     /   |   \
50    0  0 | 1  3
51     \   |   /
52      \  |  /
53       \ | /
54         1
55 
56   vertex distribution:
57     rank 0: 0 1
58     rank 1: 2 3
59   cell distribution:
60     rank 0: 0
61     rank 1: 1
62 
63 Test 1 (3 ranks):
64 Four triangles partitioned across 3 ranks
65 
66    0 _______ 3
67    | \     / |
68    |  \ 1 /  |
69    |   \ /   |
70    | 0  2  2 |
71    |   / \   |
72    |  / 3 \  |
73    | /     \ |
74    1 ------- 4
75 
76   vertex distribution:
77     rank 0: 0 1
78     rank 1: 2 3
79     rank 2: 4
80   cell distribution:
81     rank 0: 0
82     rank 1: 1
83     rank 2: 2 3
84 
85 Test 2 (3 ranks):
86 Four triangles partitioned across 3 ranks
87 
88    1 _______ 3
89    | \     / |
90    |  \ 1 /  |
91    |   \ /   |
92    | 0  0  2 |
93    |   / \   |
94    |  / 3 \  |
95    | /     \ |
96    2 ------- 4
97 
98   vertex distribution:
99     rank 0: 0 1
100     rank 1: 2 3
101     rank 2: 4
102   cell distribution:
103     rank 0: 0
104     rank 1: 1
105     rank 2: 2 3
106 
107 Tetrahedron
108 -----------
109 Test 0:
110 Two tets sharing a face
111 
112  cell   3 _______    cell
113  0    / | \      \   1
114      /  |  \      \
115     /   |   \      \
116    0----|----4-----2
117     \   |   /      /
118      \  |  /      /
119       \ | /      /
120         1-------
121    y
122    | x
123    |/
124    *----z
125 
126   vertex distribution:
127     rank 0: 0 1
128     rank 1: 2 3 4
129   cell distribution:
130     rank 0: 0
131     rank 1: 1
132 
133 Quadrilateral
134 -------------
135 Test 0 (2 ranks):
136 Two quads sharing a face
137 
138    3-------2-------5
139    |       |       |
140    |   0   |   1   |
141    |       |       |
142    0-------1-------4
143 
144   vertex distribution:
145     rank 0: 0 1 2
146     rank 1: 3 4 5
147   cell distribution:
148     rank 0: 0
149     rank 1: 1
150 
151 TODO Test 1:
152 A quad and a triangle sharing a face
153 
154    5-------4
155    |       | \
156    |   0   |  \
157    |       | 1 \
158    2-------3----6
159 
160 Hexahedron
161 ----------
162 Test 0 (2 ranks):
163 Two hexes sharing a face
164 
165 cell   7-------------6-------------11 cell
166 0     /|            /|            /|     1
167      / |   F1      / |   F7      / |
168     /  |          /  |          /  |
169    4-------------5-------------10  |
170    |   |     F4  |   |     F10 |   |
171    |   |         |   |         |   |
172    |F5 |         |F3 |         |F9 |
173    |   |  F2     |   |   F8    |   |
174    |   3---------|---2---------|---9
175    |  /          |  /          |  /
176    | /   F0      | /    F6     | /
177    |/            |/            |/
178    0-------------1-------------8
179 
180   vertex distribution:
181     rank 0: 0 1 2 3 4 5
182     rank 1: 6 7 8 9 10 11
183   cell distribution:
184     rank 0: 0
185     rank 1: 1
186 
187 */
188 
189 typedef enum {NONE, CREATE, AFTER_CREATE, AFTER_DISTRIBUTE} InterpType;
190 
191 typedef struct {
192   PetscInt   debug;                        /* The debugging level */
193   PetscInt   testNum;                      /* Indicates the mesh to create */
194   PetscInt   dim;                          /* The topological mesh dimension */
195   PetscBool  cellSimplex;                  /* Use simplices or hexes */
196   PetscBool  distribute;                   /* Distribute the mesh */
197   InterpType interpolate;                  /* Interpolate the mesh before or after DMPlexDistribute() */
198   PetscBool  useGenerator;                 /* Construct mesh with a mesh generator */
199   PetscBool  testOrientIF;                 /* Test for different original interface orientations */
200   PetscBool  testHeavy;                    /* Run the heavy PointSF test */
201   PetscBool  customView;                   /* Show results of DMPlexIsInterpolated() etc. */
202   PetscInt   ornt[2];                      /* Orientation of interface on rank 0 and rank 1 */
203   PetscInt   faces[3];                     /* Number of faces per dimension for generator */
204   PetscReal  coords[128];
205   PetscReal  coordsTol;
206   PetscInt   ncoords;
207   PetscInt   pointsToExpand[128];
208   PetscInt   nPointsToExpand;
209   PetscBool  testExpandPointsEmpty;
210   char       filename[PETSC_MAX_PATH_LEN]; /* Import mesh from file */
211 } AppCtx;
212 
213 struct _n_PortableBoundary {
214   Vec coordinates;
215   PetscInt depth;
216   PetscSection *sections;
217 };
218 typedef struct _n_PortableBoundary * PortableBoundary;
219 
220 static PetscLogStage  stage[3];
221 
222 static PetscErrorCode DMPlexCheckPointSFHeavy(DM, PortableBoundary);
223 static PetscErrorCode DMPlexSetOrientInterface_Private(DM,PetscBool);
224 static PetscErrorCode DMPlexGetExpandedBoundary_Private(DM, PortableBoundary *);
225 static PetscErrorCode DMPlexExpandedConesToFaces_Private(DM, IS, PetscSection, IS *);
226 
227 static PetscErrorCode PortableBoundaryDestroy(PortableBoundary *bnd)
228 {
229   PetscInt       d;
230   PetscErrorCode ierr;
231 
232   PetscFunctionBegin;
233   if (!*bnd) PetscFunctionReturn(0);
234   ierr = VecDestroy(&(*bnd)->coordinates);CHKERRQ(ierr);
235   for (d=0; d < (*bnd)->depth; d++) {
236     ierr = PetscSectionDestroy(&(*bnd)->sections[d]);CHKERRQ(ierr);
237   }
238   ierr = PetscFree((*bnd)->sections);CHKERRQ(ierr);
239   ierr = PetscFree(*bnd);CHKERRQ(ierr);
240   PetscFunctionReturn(0);
241 }
242 
243 static PetscErrorCode ProcessOptions(MPI_Comm comm, AppCtx *options)
244 {
245   const char    *interpTypes[4]  = {"none", "create", "after_create", "after_distribute"};
246   PetscInt       interp=NONE, dim;
247   PetscBool      flg1, flg2;
248   PetscErrorCode ierr;
249 
250   PetscFunctionBegin;
251   options->debug        = 0;
252   options->testNum      = 0;
253   options->dim          = 2;
254   options->cellSimplex  = PETSC_TRUE;
255   options->distribute   = PETSC_FALSE;
256   options->interpolate  = NONE;
257   options->useGenerator = PETSC_FALSE;
258   options->testOrientIF = PETSC_FALSE;
259   options->testHeavy    = PETSC_TRUE;
260   options->customView   = PETSC_FALSE;
261   options->testExpandPointsEmpty = PETSC_FALSE;
262   options->ornt[0]      = 0;
263   options->ornt[1]      = 0;
264   options->faces[0]     = 2;
265   options->faces[1]     = 2;
266   options->faces[2]     = 2;
267   options->filename[0]  = '\0';
268   options->coordsTol    = PETSC_DEFAULT;
269 
270   ierr = PetscOptionsBegin(comm, "", "Meshing Interpolation Test Options", "DMPLEX");CHKERRQ(ierr);
271   ierr = PetscOptionsBoundedInt("-debug", "The debugging level", "ex18.c", options->debug, &options->debug, NULL,0);CHKERRQ(ierr);
272   ierr = PetscOptionsBoundedInt("-testnum", "The mesh to create", "ex18.c", options->testNum, &options->testNum, NULL,0);CHKERRQ(ierr);
273   ierr = PetscOptionsBool("-cell_simplex", "Generate simplices if true, otherwise hexes", "ex18.c", options->cellSimplex, &options->cellSimplex, NULL);CHKERRQ(ierr);
274   ierr = PetscOptionsBool("-distribute", "Distribute the mesh", "ex18.c", options->distribute, &options->distribute, NULL);CHKERRQ(ierr);
275   ierr = PetscOptionsEList("-interpolate", "Type of mesh interpolation (none, create, after_create, after_distribute)", "ex18.c", interpTypes, 4, interpTypes[options->interpolate], &interp, NULL);CHKERRQ(ierr);
276   options->interpolate = (InterpType) interp;
277   if (!options->distribute && options->interpolate == AFTER_DISTRIBUTE) SETERRQ(comm, PETSC_ERR_SUP, "-interpolate after_distribute  needs  -distribute 1");
278   ierr = PetscOptionsBool("-use_generator", "Use a mesh generator to build the mesh", "ex18.c", options->useGenerator, &options->useGenerator, NULL);CHKERRQ(ierr);
279   options->ncoords = 128;
280   ierr = PetscOptionsRealArray("-view_vertices_from_coords", "Print DAG points corresponding to vertices with given coordinates", "ex18.c", options->coords, &options->ncoords, NULL);CHKERRQ(ierr);
281   ierr = PetscOptionsReal("-view_vertices_from_coords_tol", "Tolerance for -view_vertices_from_coords", "ex18.c", options->coordsTol, &options->coordsTol, NULL);CHKERRQ(ierr);
282   options->nPointsToExpand = 128;
283   ierr = PetscOptionsIntArray("-test_expand_points", "Expand given array of DAG point using DMPlexGetConeRecursive() and print results", "ex18.c", options->pointsToExpand, &options->nPointsToExpand, NULL);CHKERRQ(ierr);
284   if (options->nPointsToExpand) {
285     ierr = PetscOptionsBool("-test_expand_points_empty", "For -test_expand_points, rank 0 will have empty input array", "ex18.c", options->testExpandPointsEmpty, &options->testExpandPointsEmpty, NULL);CHKERRQ(ierr);
286   }
287   ierr = PetscOptionsBool("-test_heavy", "Run the heavy PointSF test", "ex18.c", options->testHeavy, &options->testHeavy, NULL);CHKERRQ(ierr);
288   ierr = PetscOptionsBool("-custom_view", "Custom DMPlex view", "ex18.c", options->customView, &options->customView, NULL);CHKERRQ(ierr);
289   ierr = PetscOptionsRangeInt("-dim", "The topological mesh dimension", "ex18.c", options->dim, &options->dim, &flg1,1,3);CHKERRQ(ierr);
290   dim = 3;
291   ierr = PetscOptionsIntArray("-faces", "Number of faces per dimension", "ex18.c", options->faces, &dim, &flg2);CHKERRQ(ierr);
292   if (flg2) {
293     if (flg1 && dim != options->dim) SETERRQ2(comm, PETSC_ERR_ARG_OUTOFRANGE, "specified -dim %D is not equal to length %D of -faces (note that -dim can be omitted)", options->dim, dim);
294     options->dim = dim;
295   }
296   ierr = PetscOptionsString("-filename", "The mesh file", "ex18.c", options->filename, options->filename, PETSC_MAX_PATH_LEN, NULL);CHKERRQ(ierr);
297   ierr = PetscOptionsBoundedInt("-rotate_interface_0", "Rotation (relative orientation) of interface on rank 0; implies -interpolate create -distribute 0", "ex18.c", options->ornt[0], &options->ornt[0], &options->testOrientIF,0);CHKERRQ(ierr);
298   ierr = PetscOptionsBoundedInt("-rotate_interface_1", "Rotation (relative orientation) of interface on rank 1; implies -interpolate create -distribute 0", "ex18.c", options->ornt[1], &options->ornt[1], &flg2,0);CHKERRQ(ierr);
299   if (flg2 != options->testOrientIF) SETERRQ(comm, PETSC_ERR_ARG_OUTOFRANGE, "neither or both -rotate_interface_0 -rotate_interface_1 must be set");
300   if (options->testOrientIF) {
301     PetscInt i;
302     for (i=0; i<2; i++) {
303       if (options->ornt[i] >= 10) options->ornt[i] = -(options->ornt[i]-10);  /* 11 12 13 become -1 -2 -3 */
304     }
305     options->filename[0]  = 0;
306     options->useGenerator = PETSC_FALSE;
307     options->dim          = 3;
308     options->cellSimplex  = PETSC_TRUE;
309     options->interpolate  = CREATE;
310     options->distribute   = PETSC_FALSE;
311   }
312   ierr = PetscOptionsEnd();
313   PetscFunctionReturn(0);
314 }
315 
316 static PetscErrorCode CreateMesh_1D(MPI_Comm comm, PetscBool interpolate, AppCtx *user, DM *dm)
317 {
318   PetscInt       testNum = user->testNum;
319   PetscMPIInt    rank,size;
320   PetscErrorCode ierr;
321   PetscInt       numCorners=2,i;
322   PetscInt       numCells,numVertices,network;
323   int            *cells;
324   PetscReal      *coords;
325 
326   PetscFunctionBegin;
327   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
328   ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr);
329   if (size > 2) SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Test mesh %d only for <=2 processes",testNum);
330 
331   numCells = 3;
332   ierr = PetscOptionsGetInt(NULL, NULL, "-ncells", &numCells, NULL);CHKERRQ(ierr);
333   if (numCells < 3) SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Test ncells must >=3",numCells);
334 
335   if (size == 1) {
336     double *dcoords;
337     numVertices = numCells + 1;
338     ierr = PetscMalloc2(2*numCells,&cells,2*numVertices,&dcoords);CHKERRQ(ierr);
339     for (i=0; i<numCells; i++) {
340       cells[2*i] = i; cells[2*i+1] = i + 1;
341       dcoords[2*i] = i; dcoords[2*i+1] = i + 1;
342     }
343 
344     ierr = DMPlexCreateFromCellList(comm, user->dim, numCells, numVertices, numCorners, PETSC_FALSE, cells, user->dim, dcoords, dm);CHKERRQ(ierr);
345     ierr = PetscFree2(cells,coords);CHKERRQ(ierr);
346     PetscFunctionReturn(0);
347   }
348 
349   network = 0;
350   ierr = PetscOptionsGetInt(NULL, NULL, "-network_case", &network, NULL);CHKERRQ(ierr);
351   if (network == 0) {
352     switch (rank) {
353     case 0:
354     {
355       numCells    = 2;
356       numVertices = numCells;
357       ierr = PetscMalloc2(2*numCells,&cells,2*numCells,&coords);CHKERRQ(ierr);
358       cells[0] = 0; cells[1] = 1;
359       cells[2] = 1; cells[3] = 2;
360       coords[0] = 0.; coords[1] = 1.;
361       coords[2] = 1.; coords[3] = 2.;
362     }
363     break;
364     case 1:
365     {
366       numCells    -= 2;
367       numVertices = numCells + 1;
368       ierr = PetscMalloc2(2*numCells,&cells,2*numCells,&coords);CHKERRQ(ierr);
369       for (i=0; i<numCells; i++) {
370         cells[2*i] = 2+i; cells[2*i+1] = 2 + i + 1;
371         coords[2*i] = 2+i; coords[2*i+1] = 2 + i + 1;
372       }
373     }
374     break;
375     default: SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh for rank %d", rank);
376     }
377   } else { /* network_case = 1 */
378     /* ----------------------- */
379     switch (rank) {
380     case 0:
381     {
382       numCells    = 2;
383       numVertices = 3;
384       ierr = PetscMalloc2(2*numCells,&cells,2*numCells,&coords);CHKERRQ(ierr);
385       cells[0] = 0; cells[1] = 3;
386       cells[2] = 3; cells[3] = 1;
387     }
388     break;
389     case 1:
390     {
391       numCells    = 1;
392       numVertices = 1;
393       ierr = PetscMalloc2(2*numCells,&cells,2*numCells,&coords);CHKERRQ(ierr);
394       cells[0] = 3; cells[1] = 2;
395     }
396     break;
397     default: SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh for rank %d", rank);
398     }
399   }
400   ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, PETSC_FALSE, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
401   ierr = PetscFree2(cells,coords);CHKERRQ(ierr);
402   PetscFunctionReturn(0);
403 }
404 
405 static PetscErrorCode CreateSimplex_2D(MPI_Comm comm, PetscBool interpolate, AppCtx *user, DM *dm)
406 {
407   PetscInt       testNum = user->testNum, p;
408   PetscMPIInt    rank, size;
409   PetscErrorCode ierr;
410 
411   PetscFunctionBegin;
412   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
413   ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr);
414   switch (testNum) {
415   case 0:
416     if (size != 2) SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Test mesh %d only for 2 processes", testNum);
417     switch (rank) {
418       case 0:
419       {
420         const PetscInt numCells  = 1, numVertices = 2, numCorners = 3;
421         const int      cells[3]  = {0, 1, 2};
422         PetscReal      coords[4] = {-0.5, 0.5, 0.0, 0.0};
423         PetscInt       markerPoints[6] = {1, 1, 2, 1, 3, 1};
424 
425         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
426         for (p = 0; p < 3; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
427       }
428       break;
429       case 1:
430       {
431         const PetscInt numCells  = 1, numVertices = 2, numCorners = 3;
432         const int      cells[3]  = {1, 3, 2};
433         PetscReal      coords[4] = {0.0, 1.0, 0.5, 0.5};
434         PetscInt       markerPoints[6] = {1, 1, 2, 1, 3, 1};
435 
436         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
437         for (p = 0; p < 3; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
438       }
439       break;
440       default: SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh for rank %d", rank);
441     }
442     break;
443   case 1:
444     if (size != 3) SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Test mesh %d only for 3 processes", testNum);
445     switch (rank) {
446       case 0:
447       {
448         const PetscInt numCells  = 1, numVertices = 2, numCorners = 3;
449         const int      cells[3]  = {0, 1, 2};
450         PetscReal      coords[4] = {0.0, 1.0, 0.0, 0.0};
451         PetscInt       markerPoints[6] = {1, 1, 2, 1, 3, 1};
452 
453         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
454         for (p = 0; p < 3; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
455       }
456       break;
457       case 1:
458       {
459         const PetscInt numCells  = 1, numVertices = 2, numCorners = 3;
460         const int      cells[3]  = {0, 2, 3};
461         PetscReal      coords[4] = {0.5, 0.5, 1.0, 1.0};
462         PetscInt       markerPoints[6] = {1, 1, 2, 1, 3, 1};
463 
464         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
465         for (p = 0; p < 3; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
466       }
467       break;
468       case 2:
469       {
470         const PetscInt numCells  = 2, numVertices = 1, numCorners = 3;
471         const int      cells[6]  = {2, 4, 3, 2, 1, 4};
472         PetscReal      coords[2] = {1.0, 0.0};
473         PetscInt       markerPoints[10] = {2, 1, 3, 1, 4, 1, 5, 1, 6, 1};
474 
475         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
476         for (p = 0; p < 3; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
477       }
478       break;
479       default: SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh for rank %d", rank);
480     }
481     break;
482   case 2:
483     if (size != 3) SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Test mesh %d only for 3 processes", testNum);
484     switch (rank) {
485       case 0:
486       {
487         const PetscInt numCells  = 1, numVertices = 2, numCorners = 3;
488         const int      cells[3]  = {1, 2, 0};
489         PetscReal      coords[4] = {0.5, 0.5, 0.0, 1.0};
490         PetscInt       markerPoints[6] = {1, 1, 2, 1, 3, 1};
491 
492         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
493         for (p = 0; p < 3; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
494       }
495       break;
496       case 1:
497       {
498         const PetscInt numCells  = 1, numVertices = 2, numCorners = 3;
499         const int      cells[3]  = {1, 0, 3};
500         PetscReal      coords[4] = {0.0, 0.0, 1.0, 1.0};
501         PetscInt       markerPoints[6] = {1, 1, 2, 1, 3, 1};
502 
503         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
504         for (p = 0; p < 3; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
505       }
506       break;
507       case 2:
508       {
509         const PetscInt numCells  = 2, numVertices = 1, numCorners = 3;
510         const int      cells[6]  = {0, 4, 3, 0, 2, 4};
511         PetscReal      coords[2] = {1.0, 0.0};
512         PetscInt       markerPoints[10] = {2, 1, 3, 1, 4, 1, 5, 1, 6, 1};
513 
514         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
515         for (p = 0; p < 3; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
516       }
517       break;
518       default: SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh for rank %d", rank);
519     }
520     break;
521   default: SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh %D", testNum);
522   }
523   PetscFunctionReturn(0);
524 }
525 
526 static PetscErrorCode CreateSimplex_3D(MPI_Comm comm, PetscBool interpolate, AppCtx *user, DM *dm)
527 {
528   PetscInt       testNum = user->testNum, p;
529   PetscMPIInt    rank, size;
530   PetscErrorCode ierr;
531 
532   PetscFunctionBegin;
533   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
534   ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr);
535   switch (testNum) {
536   case 0:
537     if (size != 2) SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Test mesh %d only for 2 processes", testNum);
538     switch (rank) {
539       case 0:
540       {
541         const PetscInt numCells  = 1, numVertices = 2, numCorners = 4;
542         const int      cells[4]  = {0, 2, 1, 3};
543         PetscReal      coords[6] = {0.0, 0.0, -0.5,  0.0, -0.5, 0.0};
544         PetscInt       markerPoints[8] = {1, 1, 2, 1, 3, 1, 4, 1};
545 
546         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
547         for (p = 0; p < 4; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
548       }
549       break;
550       case 1:
551       {
552         const PetscInt numCells  = 1, numVertices = 3, numCorners = 4;
553         const int      cells[4]  = {1, 2, 4, 3};
554         PetscReal      coords[9] = {1.0, 0.0, 0.0,  0.0, 0.5, 0.0,  0.0, 0.0, 0.5};
555         PetscInt       markerPoints[8] = {1, 1, 2, 1, 3, 1, 4, 1};
556 
557         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
558         for (p = 0; p < 4; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
559       }
560       break;
561       default: SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh for rank %d", rank);
562     }
563     break;
564   default: SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh %D", testNum);
565   }
566   if (user->testOrientIF) {
567     PetscInt start;
568     PetscBool reverse;
569     PetscInt ifp[] = {8, 6};
570 
571     ierr = PetscObjectSetName((PetscObject) *dm, "Mesh before orientation");CHKERRQ(ierr);
572     ierr = DMViewFromOptions(*dm, NULL, "-before_orientation_dm_view");CHKERRQ(ierr);
573     /* rotate interface face ifp[rank] by given orientation ornt[rank] */
574     ierr = DMPlexFixFaceOrientations_Translate_Private(user->ornt[rank], &start, &reverse);CHKERRQ(ierr);
575     ierr = DMPlexOrientCell_Internal(*dm, ifp[rank], start, reverse);CHKERRQ(ierr);
576     ierr = DMPlexCheckFaces(*dm, 0);CHKERRQ(ierr);
577     ierr = DMPlexOrientInterface_Internal(*dm);CHKERRQ(ierr);
578     ierr = PetscPrintf(comm, "Orientation test PASSED\n");CHKERRQ(ierr);
579   }
580   PetscFunctionReturn(0);
581 }
582 
583 static PetscErrorCode CreateQuad_2D(MPI_Comm comm, PetscBool interpolate, AppCtx *user, DM *dm)
584 {
585   PetscInt       testNum = user->testNum, p;
586   PetscMPIInt    rank, size;
587   PetscErrorCode ierr;
588 
589   PetscFunctionBegin;
590   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
591   ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr);
592   switch (testNum) {
593   case 0:
594     if (size != 2) SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Test mesh %d only for 2 processes", testNum);
595     switch (rank) {
596       case 0:
597       {
598         const PetscInt numCells  = 1, numVertices = 3, numCorners = 4;
599         const int      cells[4]  = {0, 1, 2, 3};
600         PetscReal      coords[6] = {-0.5, 0.0, 0.0, 0.0, 0.0, 1.0};
601         PetscInt       markerPoints[4*2] = {1, 1, 2, 1, 3, 1, 4, 1};
602 
603         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
604         for (p = 0; p < 4; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
605       }
606       break;
607       case 1:
608       {
609         const PetscInt numCells  = 1, numVertices = 3, numCorners = 4;
610         const int      cells[4]  = {1, 4, 5, 2};
611         PetscReal      coords[6] = {-0.5, 1.0, 0.5, 0.0, 0.5, 1.0};
612         PetscInt       markerPoints[4*2] = {1, 1, 2, 1, 3, 1, 4, 1};
613 
614         ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
615         for (p = 0; p < 4; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
616       }
617       break;
618       default: SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh for rank %d", rank);
619     }
620     break;
621   default: SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh %D", testNum);
622   }
623   PetscFunctionReturn(0);
624 }
625 
626 static PetscErrorCode CreateHex_3D(MPI_Comm comm, PetscBool interpolate, AppCtx *user, DM *dm)
627 {
628   PetscInt       testNum = user->testNum, p;
629   PetscMPIInt    rank, size;
630   PetscErrorCode ierr;
631 
632   PetscFunctionBegin;
633   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
634   ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr);
635   switch (testNum) {
636   case 0:
637     if (size != 2) SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Test mesh %d only for 2 processes", testNum);
638     switch (rank) {
639     case 0:
640     {
641       const PetscInt numCells  = 1, numVertices = 6, numCorners = 8;
642       const int      cells[8]  = {0, 3, 2, 1, 4, 5, 6, 7};
643       PetscReal      coords[6*3] = {-0.5,0.0,0.0, 0.0,0.0,0.0, 0.0,1.0,0.0, -0.5,1.0,0.0, -0.5,0.0,1.0, 0.0,0.0,1.0};
644       PetscInt       markerPoints[8*2] = {2,1,3,1,4,1,5,1,6,1,7,1,8,1,9,1};
645 
646       ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
647       for (p = 0; p < 4; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
648     }
649     break;
650     case 1:
651     {
652       const PetscInt numCells  = 1, numVertices = 6, numCorners = 8;
653       const int      cells[8]  = {1, 2, 9, 8, 5, 10, 11, 6};
654       PetscReal      coords[6*3] = {0.0,1.0,1.0, -0.5,1.0,1.0, 0.5,0.0,0.0, 0.5,1.0,0.0, 0.5,0.0,1.0,  0.5,1.0,1.0};
655       PetscInt       markerPoints[8*2] = {2,1,3,1,4,1,5,1,6,1,7,1,8,1,9,1};
656 
657       ierr = DMPlexCreateFromCellListParallel(comm, user->dim, numCells, numVertices, numCorners, interpolate, cells, user->dim, coords, NULL, dm);CHKERRQ(ierr);
658       for (p = 0; p < 4; ++p) {ierr = DMSetLabelValue(*dm, "marker", markerPoints[p*2], markerPoints[p*2+1]);CHKERRQ(ierr);}
659     }
660     break;
661     default: SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh for rank %d", rank);
662     }
663   break;
664   default: SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "No test mesh %D", testNum);
665   }
666   PetscFunctionReturn(0);
667 }
668 
669 static PetscErrorCode CustomView(DM dm, PetscViewer v)
670 {
671   DMPlexInterpolatedFlag interpolated;
672   PetscBool              distributed;
673   PetscErrorCode         ierr;
674 
675   PetscFunctionBegin;
676   ierr = DMPlexIsDistributed(dm, &distributed);CHKERRQ(ierr);
677   ierr = DMPlexIsInterpolatedCollective(dm, &interpolated);CHKERRQ(ierr);
678   ierr = PetscViewerASCIIPrintf(v, "DMPlexIsDistributed: %s\n", PetscBools[distributed]);CHKERRQ(ierr);
679   ierr = PetscViewerASCIIPrintf(v, "DMPlexIsInterpolatedCollective: %s\n", DMPlexInterpolatedFlags[interpolated]);CHKERRQ(ierr);
680   PetscFunctionReturn(0);
681 }
682 
683 static PetscErrorCode CreateMeshFromFile(MPI_Comm comm, AppCtx *user, DM *dm, DM *serialDM)
684 {
685   const char    *filename       = user->filename;
686   PetscBool      testHeavy      = user->testHeavy;
687   PetscBool      interpCreate   = user->interpolate == CREATE ? PETSC_TRUE : PETSC_FALSE;
688   PetscBool      distributed    = PETSC_FALSE;
689   PetscErrorCode ierr;
690 
691   PetscFunctionBegin;
692   *serialDM = NULL;
693   if (testHeavy && interpCreate) {ierr = DMPlexSetOrientInterface_Private(NULL, PETSC_FALSE);CHKERRQ(ierr);}
694   ierr = PetscLogStagePush(stage[0]);CHKERRQ(ierr);
695   ierr = DMPlexCreateFromFile(comm, filename, interpCreate, dm);CHKERRQ(ierr); /* with DMPlexOrientInterface_Internal() call skipped so that PointSF issues are left to DMPlexCheckPointSFHeavy() */
696   ierr = PetscLogStagePop();CHKERRQ(ierr);
697   if (testHeavy && interpCreate) {ierr = DMPlexSetOrientInterface_Private(NULL, PETSC_TRUE);CHKERRQ(ierr);}
698   ierr = DMPlexIsDistributed(*dm, &distributed);CHKERRQ(ierr);
699   ierr = PetscPrintf(comm, "DMPlexCreateFromFile produced %s mesh.\n", distributed ? "distributed" : "serial");CHKERRQ(ierr);
700   if (testHeavy && distributed) {
701     ierr = PetscOptionsSetValue(NULL, "-dm_plex_hdf5_force_sequential", NULL);CHKERRQ(ierr);
702     ierr = DMPlexCreateFromFile(comm, filename, interpCreate, serialDM);CHKERRQ(ierr);
703     ierr = DMPlexIsDistributed(*serialDM, &distributed);CHKERRQ(ierr);
704     if (distributed) SETERRQ(comm, PETSC_ERR_PLIB, "unable to create a serial DM from file");
705   }
706   ierr = DMGetDimension(*dm, &user->dim);CHKERRQ(ierr);
707   PetscFunctionReturn(0);
708 }
709 
710 static PetscErrorCode CreateMesh(MPI_Comm comm, AppCtx *user, DM *dm)
711 {
712   PetscPartitioner part;
713   PortableBoundary boundary     = NULL;
714   DM             serialDM       = NULL;
715   PetscBool      cellSimplex    = user->cellSimplex;
716   PetscBool      useGenerator   = user->useGenerator;
717   PetscBool      interpCreate   = user->interpolate == CREATE ? PETSC_TRUE : PETSC_FALSE;
718   PetscBool      interpSerial   = user->interpolate == AFTER_CREATE ? PETSC_TRUE : PETSC_FALSE;
719   PetscBool      interpParallel = user->interpolate == AFTER_DISTRIBUTE ? PETSC_TRUE : PETSC_FALSE;
720   PetscBool      testHeavy      = user->testHeavy;
721   PetscMPIInt    rank;
722   PetscErrorCode ierr;
723 
724   PetscFunctionBegin;
725   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
726   if (user->filename[0]) {
727     ierr = CreateMeshFromFile(comm, user, dm, &serialDM);CHKERRQ(ierr);
728   } else if (useGenerator) {
729     ierr = PetscLogStagePush(stage[0]);CHKERRQ(ierr);
730     ierr = DMPlexCreateBoxMesh(comm, user->dim, cellSimplex, user->faces, NULL, NULL, NULL, interpCreate, dm);CHKERRQ(ierr);
731     ierr = PetscLogStagePop();CHKERRQ(ierr);
732   } else {
733     ierr = PetscLogStagePush(stage[0]);CHKERRQ(ierr);
734     switch (user->dim) {
735     case 1:
736       ierr = CreateMesh_1D(comm, interpCreate, user, dm);CHKERRQ(ierr);
737       break;
738     case 2:
739       if (cellSimplex) {
740         ierr = CreateSimplex_2D(comm, interpCreate, user, dm);CHKERRQ(ierr);
741       } else {
742         ierr = CreateQuad_2D(comm, interpCreate, user, dm);CHKERRQ(ierr);
743       }
744       break;
745     case 3:
746       if (cellSimplex) {
747         ierr = CreateSimplex_3D(comm, interpCreate, user, dm);CHKERRQ(ierr);
748       } else {
749         ierr = CreateHex_3D(comm, interpCreate, user, dm);CHKERRQ(ierr);
750       }
751       break;
752     default:
753       SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Cannot make meshes for dimension %D", user->dim);
754     }
755     ierr = PetscLogStagePop();CHKERRQ(ierr);
756   }
757   if (user->ncoords % user->dim) SETERRQ2(comm, PETSC_ERR_ARG_OUTOFRANGE, "length of coordinates array %D must be divisable by spatial dimension %D", user->ncoords, user->dim);
758   ierr = PetscObjectSetName((PetscObject) *dm, "Original Mesh");CHKERRQ(ierr);
759   ierr = DMViewFromOptions(*dm, NULL, "-orig_dm_view");CHKERRQ(ierr);
760 
761   if (interpSerial) {
762     DM idm;
763 
764     if (testHeavy) {ierr = DMPlexSetOrientInterface_Private(*dm, PETSC_FALSE);CHKERRQ(ierr);}
765     ierr = PetscLogStagePush(stage[2]);CHKERRQ(ierr);
766     ierr = DMPlexInterpolate(*dm, &idm);CHKERRQ(ierr); /* with DMPlexOrientInterface_Internal() call skipped so that PointSF issues are left to DMPlexCheckPointSFHeavy() */
767     ierr = PetscLogStagePop();CHKERRQ(ierr);
768     if (testHeavy) {ierr = DMPlexSetOrientInterface_Private(*dm, PETSC_TRUE);CHKERRQ(ierr);}
769     ierr = DMDestroy(dm);CHKERRQ(ierr);
770     *dm = idm;
771     ierr = PetscObjectSetName((PetscObject) *dm, "Interpolated Mesh");CHKERRQ(ierr);
772     ierr = DMViewFromOptions(*dm, NULL, "-intp_dm_view");CHKERRQ(ierr);
773   }
774 
775   /* Set partitioner options */
776   ierr = DMPlexGetPartitioner(*dm, &part);CHKERRQ(ierr);
777   if (part) {
778     ierr = PetscPartitionerSetType(part, PETSCPARTITIONERSIMPLE);CHKERRQ(ierr);
779     ierr = PetscPartitionerSetFromOptions(part);CHKERRQ(ierr);
780   }
781 
782   if (user->customView) {ierr = CustomView(*dm, PETSC_VIEWER_STDOUT_(comm));CHKERRQ(ierr);}
783   if (testHeavy) {
784     PetscBool distributed;
785 
786     ierr = DMPlexIsDistributed(*dm, &distributed);CHKERRQ(ierr);
787     if (!serialDM && !distributed) {
788       serialDM = *dm;
789       ierr = PetscObjectReference((PetscObject)*dm);CHKERRQ(ierr);
790     }
791     if (serialDM) {
792       ierr = DMPlexGetExpandedBoundary_Private(serialDM, &boundary);CHKERRQ(ierr);
793     }
794     if (boundary) {
795       /* check DM which has been created in parallel and already interpolated */
796       ierr = DMPlexCheckPointSFHeavy(*dm, boundary);CHKERRQ(ierr);
797     }
798     /* Orient interface because it could be deliberately skipped above. It is idempotent. */
799     ierr = DMPlexOrientInterface_Internal(*dm);CHKERRQ(ierr);
800   }
801   if (user->distribute) {
802     DM               pdm = NULL;
803 
804     /* Redistribute mesh over processes using that partitioner */
805     ierr = PetscLogStagePush(stage[1]);CHKERRQ(ierr);
806     ierr = DMPlexDistribute(*dm, 0, NULL, &pdm);CHKERRQ(ierr);
807     ierr = PetscLogStagePop();CHKERRQ(ierr);
808     if (pdm) {
809       ierr = DMDestroy(dm);CHKERRQ(ierr);
810       *dm  = pdm;
811       ierr = PetscObjectSetName((PetscObject) *dm, "Redistributed Mesh");CHKERRQ(ierr);
812       ierr = DMViewFromOptions(*dm, NULL, "-dist_dm_view");CHKERRQ(ierr);
813     }
814 
815     if (interpParallel) {
816       DM idm;
817 
818       if (testHeavy) {ierr = DMPlexSetOrientInterface_Private(*dm, PETSC_FALSE);CHKERRQ(ierr);}
819       ierr = PetscLogStagePush(stage[2]);CHKERRQ(ierr);
820       ierr = DMPlexInterpolate(*dm, &idm);CHKERRQ(ierr); /* with DMPlexOrientInterface_Internal() call skipped so that PointSF issues are left to DMPlexCheckPointSFHeavy() */
821       ierr = PetscLogStagePop();CHKERRQ(ierr);
822       if (testHeavy) {ierr = DMPlexSetOrientInterface_Private(*dm, PETSC_TRUE);CHKERRQ(ierr);}
823       ierr = DMDestroy(dm);CHKERRQ(ierr);
824       *dm = idm;
825       ierr = PetscObjectSetName((PetscObject) *dm, "Interpolated Redistributed Mesh");CHKERRQ(ierr);
826       ierr = DMViewFromOptions(*dm, NULL, "-intp_dm_view");CHKERRQ(ierr);
827     }
828   }
829   if (testHeavy) {
830     if (boundary) {
831       ierr = DMPlexCheckPointSFHeavy(*dm, boundary);CHKERRQ(ierr);
832     }
833     /* Orient interface because it could be deliberately skipped above. It is idempotent. */
834     ierr = DMPlexOrientInterface_Internal(*dm);CHKERRQ(ierr);
835   }
836 
837   ierr = PetscObjectSetName((PetscObject) *dm, "Parallel Mesh");CHKERRQ(ierr);
838   ierr = DMSetFromOptions(*dm);CHKERRQ(ierr);
839   ierr = DMViewFromOptions(*dm, NULL, "-dm_view");CHKERRQ(ierr);
840 
841   if (user->customView) {ierr = CustomView(*dm, PETSC_VIEWER_STDOUT_(comm));CHKERRQ(ierr);}
842   ierr = DMDestroy(&serialDM);CHKERRQ(ierr);
843   ierr = PortableBoundaryDestroy(&boundary);CHKERRQ(ierr);
844   PetscFunctionReturn(0);
845 }
846 
847 PETSC_STATIC_INLINE PetscErrorCode coord2str(char buf[], size_t len, PetscInt dim, PetscReal *coords, PetscReal tol)
848 {
849   PetscErrorCode ierr;
850 
851   PetscFunctionBegin;
852   if (dim > 3) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_SUP, "dim must be less than or equal 3");
853   if (tol >= 1e-3) {
854     switch (dim) {
855       case 1: ierr = PetscSNPrintf(buf,len,"(%12.3f)",(double)coords[0]);CHKERRQ(ierr);
856       case 2: ierr = PetscSNPrintf(buf,len,"(%12.3f, %12.3f)",(double)coords[0],(double)coords[1]);CHKERRQ(ierr);
857       case 3: ierr = PetscSNPrintf(buf,len,"(%12.3f, %12.3f, %12.3f)",(double)coords[0],(double)coords[1],(double)coords[2]);CHKERRQ(ierr);
858     }
859   } else {
860     switch (dim) {
861       case 1: ierr = PetscSNPrintf(buf,len,"(%12.6f)",(double)coords[0]);CHKERRQ(ierr);
862       case 2: ierr = PetscSNPrintf(buf,len,"(%12.6f, %12.6f)",(double)coords[0],(double)coords[1]);CHKERRQ(ierr);
863       case 3: ierr = PetscSNPrintf(buf,len,"(%12.6f, %12.6f, %12.6f)",(double)coords[0],(double)coords[1],(double)coords[2]);CHKERRQ(ierr);
864     }
865   }
866   PetscFunctionReturn(0);
867 }
868 
869 static PetscErrorCode ViewVerticesFromCoords(DM dm, PetscInt npoints, PetscReal coords[], PetscReal tol, PetscViewer viewer)
870 {
871   PetscInt       dim, i;
872   PetscInt       *points;
873   char           coordstr[128];
874   MPI_Comm       comm;
875   PetscMPIInt    rank;
876   PetscErrorCode ierr;
877 
878   PetscFunctionBegin;
879   ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr);
880   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
881   ierr = DMGetDimension(dm, &dim);CHKERRQ(ierr);
882   ierr = PetscViewerASCIIPushSynchronized(viewer);CHKERRQ(ierr);
883   ierr = PetscMalloc1(npoints, &points);CHKERRQ(ierr);
884   ierr = DMPlexFindVertices(dm, npoints, coords, tol, points);CHKERRQ(ierr);
885   for (i=0; i < npoints; i++) {
886     ierr = coord2str(coordstr, sizeof(coordstr), dim, &coords[i*dim], tol);CHKERRQ(ierr);
887     if (!rank && i) {ierr = PetscViewerASCIISynchronizedPrintf(viewer, "-----\n");CHKERRQ(ierr);}
888     ierr = PetscViewerASCIISynchronizedPrintf(viewer, "[%d] %s --> points[%D] = %D\n", rank, coordstr, i, points[i]);CHKERRQ(ierr);
889     ierr = PetscViewerFlush(viewer);CHKERRQ(ierr);
890   }
891   ierr = PetscViewerASCIIPopSynchronized(viewer);CHKERRQ(ierr);
892   ierr = PetscFree(points);CHKERRQ(ierr);
893   PetscFunctionReturn(0);
894 }
895 
896 static PetscErrorCode TestExpandPoints(DM dm, AppCtx *user)
897 {
898   IS                is;
899   PetscSection      *sects;
900   IS                *iss;
901   PetscInt          d,depth;
902   PetscMPIInt       rank;
903   PetscErrorCode    ierr;
904   PetscViewer       viewer=PETSC_VIEWER_STDOUT_WORLD, sviewer;
905 
906   PetscFunctionBegin;
907   ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)dm),&rank);CHKERRQ(ierr);
908   if (user->testExpandPointsEmpty && !rank) {
909     ierr = ISCreateGeneral(PETSC_COMM_SELF, 0, NULL, PETSC_USE_POINTER, &is);CHKERRQ(ierr);
910   } else {
911     ierr = ISCreateGeneral(PETSC_COMM_SELF, user->nPointsToExpand, user->pointsToExpand, PETSC_USE_POINTER, &is);CHKERRQ(ierr);
912   }
913   ierr = DMPlexGetConeRecursive(dm, is, &depth, &iss, &sects);CHKERRQ(ierr);
914   ierr = PetscViewerGetSubViewer(viewer,PETSC_COMM_SELF,&sviewer);CHKERRQ(ierr);
915   ierr = PetscViewerASCIIPrintf(sviewer, "[%d] ==========================\n",rank);CHKERRQ(ierr);
916   for (d=depth-1; d>=0; d--) {
917     IS          checkIS;
918     PetscBool   flg;
919 
920     ierr = PetscViewerASCIIPrintf(sviewer, "depth %D ---------------\n",d);CHKERRQ(ierr);
921     ierr = PetscSectionView(sects[d], sviewer);CHKERRQ(ierr);
922     ierr = ISView(iss[d], sviewer);CHKERRQ(ierr);
923     /* check reverse operation */
924     if (d < depth-1) {
925       ierr = DMPlexExpandedConesToFaces_Private(dm, iss[d], sects[d], &checkIS);CHKERRQ(ierr);
926       ierr = ISEqualUnsorted(checkIS, iss[d+1], &flg);CHKERRQ(ierr);
927       if (!flg) SETERRQ(PetscObjectComm((PetscObject) checkIS), PETSC_ERR_PLIB, "DMPlexExpandedConesToFaces_Private produced wrong IS");
928       ierr = ISDestroy(&checkIS);CHKERRQ(ierr);
929     }
930   }
931   ierr = PetscViewerRestoreSubViewer(viewer,PETSC_COMM_SELF,&sviewer);CHKERRQ(ierr);
932   ierr = PetscViewerFlush(viewer);CHKERRQ(ierr);
933   ierr = DMPlexRestoreConeRecursive(dm, is, &depth, &iss, &sects);CHKERRQ(ierr);
934   ierr = ISDestroy(&is);CHKERRQ(ierr);
935   PetscFunctionReturn(0);
936 }
937 
938 static PetscErrorCode DMPlexExpandedConesToFaces_Private(DM dm, IS is, PetscSection section, IS *newis)
939 {
940   PetscInt          n,n1,ncone,numCoveredPoints,o,p,q,start,end;
941   const PetscInt    *coveredPoints;
942   const PetscInt    *arr, *cone;
943   PetscInt          *newarr;
944   PetscErrorCode    ierr;
945 
946   PetscFunctionBegin;
947   ierr = ISGetLocalSize(is, &n);CHKERRQ(ierr);
948   ierr = PetscSectionGetStorageSize(section, &n1);CHKERRQ(ierr);
949   ierr = PetscSectionGetChart(section, &start, &end);CHKERRQ(ierr);
950   if (n != n1) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_PLIB, "IS size = %D != %D = section storage size\n", n, n1);
951   ierr = ISGetIndices(is, &arr);CHKERRQ(ierr);
952   ierr = PetscMalloc1(end-start, &newarr);CHKERRQ(ierr);
953   for (q=start; q<end; q++) {
954     ierr = PetscSectionGetDof(section, q, &ncone);CHKERRQ(ierr);
955     ierr = PetscSectionGetOffset(section, q, &o);CHKERRQ(ierr);
956     cone = &arr[o];
957     if (ncone == 1) {
958       numCoveredPoints = 1;
959       p = cone[0];
960     } else {
961       PetscInt i;
962       p = PETSC_MAX_INT;
963       for (i=0; i<ncone; i++) if (cone[i] < 0) {p = -1; break;}
964       if (p >= 0) {
965         ierr = DMPlexGetJoin(dm, ncone, cone, &numCoveredPoints, &coveredPoints);CHKERRQ(ierr);
966         if (numCoveredPoints > 1) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "more than one covered points for section point %D",q);
967         if (numCoveredPoints) p = coveredPoints[0];
968         else                  p = -2;
969         ierr = DMPlexRestoreJoin(dm, ncone, cone, &numCoveredPoints, &coveredPoints);CHKERRQ(ierr);
970       }
971     }
972     newarr[q-start] = p;
973   }
974   ierr = ISRestoreIndices(is, &arr);CHKERRQ(ierr);
975   ierr = ISCreateGeneral(PETSC_COMM_SELF, end-start, newarr, PETSC_OWN_POINTER, newis);CHKERRQ(ierr);
976   PetscFunctionReturn(0);
977 }
978 
979 static PetscErrorCode DMPlexExpandedVerticesToFaces_Private(DM dm, IS boundary_expanded_is, PetscInt depth, PetscSection sections[], IS *boundary_is)
980 {
981   PetscInt          d;
982   IS                is,newis;
983   PetscErrorCode    ierr;
984 
985   PetscFunctionBegin;
986   is = boundary_expanded_is;
987   ierr = PetscObjectReference((PetscObject)is);CHKERRQ(ierr);
988   for (d = 0; d < depth-1; ++d) {
989     ierr = DMPlexExpandedConesToFaces_Private(dm, is, sections[d], &newis);CHKERRQ(ierr);
990     ierr = ISDestroy(&is);CHKERRQ(ierr);
991     is = newis;
992   }
993   *boundary_is = is;
994   PetscFunctionReturn(0);
995 }
996 
997 #define CHKERRQI(incall,ierr) if (ierr) {incall = PETSC_FALSE; }
998 
999 static PetscErrorCode DMLabelViewFromOptionsOnComm_Private(DMLabel label, const char optionname[], MPI_Comm comm)
1000 {
1001   PetscErrorCode    ierr;
1002   PetscViewer       viewer;
1003   PetscBool         flg;
1004   static PetscBool  incall = PETSC_FALSE;
1005   PetscViewerFormat format;
1006 
1007   PetscFunctionBegin;
1008   if (incall) PetscFunctionReturn(0);
1009   incall = PETSC_TRUE;
1010   ierr   = PetscOptionsGetViewer(comm,((PetscObject)label)->options,((PetscObject)label)->prefix,optionname,&viewer,&format,&flg);CHKERRQI(incall,ierr);
1011   if (flg) {
1012     ierr = PetscViewerPushFormat(viewer,format);CHKERRQI(incall,ierr);
1013     ierr = DMLabelView(label, viewer);CHKERRQI(incall,ierr);
1014     ierr = PetscViewerPopFormat(viewer);CHKERRQI(incall,ierr);
1015     ierr = PetscViewerDestroy(&viewer);CHKERRQI(incall,ierr);
1016   }
1017   incall = PETSC_FALSE;
1018   PetscFunctionReturn(0);
1019 }
1020 
1021 /* TODO: this is hotfixing DMLabelGetStratumIS() - it should be fixed systematically instead */
1022 PETSC_STATIC_INLINE PetscErrorCode DMLabelGetStratumISOnComm_Private(DMLabel label, PetscInt value, MPI_Comm comm, IS *is)
1023 {
1024   IS                tmpis;
1025   PetscErrorCode    ierr;
1026 
1027   PetscFunctionBegin;
1028   ierr = DMLabelGetStratumIS(label, value, &tmpis);CHKERRQ(ierr);
1029   if (!tmpis) {ierr = ISCreateGeneral(PETSC_COMM_SELF, 0, NULL, PETSC_USE_POINTER, &tmpis);CHKERRQ(ierr);}
1030   ierr = ISOnComm(tmpis, comm, PETSC_COPY_VALUES, is);CHKERRQ(ierr);
1031   ierr = ISDestroy(&tmpis);CHKERRQ(ierr);
1032   PetscFunctionReturn(0);
1033 }
1034 
1035 /* currently only for simple PetscSection without fields or constraints */
1036 static PetscErrorCode PetscSectionReplicate_Private(MPI_Comm comm, PetscMPIInt rootrank, PetscSection sec0, PetscSection *secout)
1037 {
1038   PetscSection      sec;
1039   PetscInt          chart[2], p;
1040   PetscInt          *dofarr;
1041   PetscMPIInt       rank;
1042   PetscErrorCode    ierr;
1043 
1044   PetscFunctionBegin;
1045   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
1046   if (rank == rootrank) {
1047     ierr = PetscSectionGetChart(sec0, &chart[0], &chart[1]);CHKERRQ(ierr);
1048   }
1049   ierr = MPI_Bcast(chart, 2, MPIU_INT, rootrank, comm);CHKERRQ(ierr);
1050   ierr = PetscMalloc1(chart[1]-chart[0], &dofarr);CHKERRQ(ierr);
1051   if (rank == rootrank) {
1052     for (p = chart[0]; p < chart[1]; p++) {
1053       ierr = PetscSectionGetDof(sec0, p, &dofarr[p-chart[0]]);CHKERRQ(ierr);
1054     }
1055   }
1056   ierr = MPI_Bcast(dofarr, chart[1]-chart[0], MPIU_INT, rootrank, comm);CHKERRQ(ierr);
1057   ierr = PetscSectionCreate(comm, &sec);CHKERRQ(ierr);
1058   ierr = PetscSectionSetChart(sec, chart[0], chart[1]);CHKERRQ(ierr);
1059   for (p = chart[0]; p < chart[1]; p++) {
1060     ierr = PetscSectionSetDof(sec, p, dofarr[p-chart[0]]);CHKERRQ(ierr);
1061   }
1062   ierr = PetscSectionSetUp(sec);CHKERRQ(ierr);
1063   ierr = PetscFree(dofarr);CHKERRQ(ierr);
1064   *secout = sec;
1065   PetscFunctionReturn(0);
1066 }
1067 
1068 static PetscErrorCode VecToPetscReal_Private(Vec vec, PetscReal *rvals[])
1069 {
1070   PetscInt          n;
1071   const PetscScalar *svals;
1072   PetscErrorCode    ierr;
1073 
1074   PetscFunctionBegin;
1075   ierr = VecGetLocalSize(vec, &n);CHKERRQ(ierr);
1076   ierr = VecGetArrayRead(vec, &svals);CHKERRQ(ierr);
1077   ierr = PetscMalloc1(n, rvals);CHKERRQ(ierr);
1078 #if defined(PETSC_USE_COMPLEX)
1079   {
1080     PetscInt i;
1081     for (i=0; i<n; i++) (*rvals)[i] = PetscRealPart(svals[i]);
1082   }
1083 #else
1084   ierr = PetscMemcpy(*rvals, svals, n*sizeof(PetscReal));
1085 #endif
1086   ierr = VecRestoreArrayRead(vec, &svals);CHKERRQ(ierr);
1087   PetscFunctionReturn(0);
1088 }
1089 
1090 static PetscErrorCode DMPlexExpandedVerticesCoordinatesToFaces_Private(DM ipdm, PortableBoundary bnd, IS *face_is)
1091 {
1092   PetscInt            dim, ncoords, npoints;
1093   PetscReal           *rcoords;
1094   PetscInt            *points;
1095   IS                  faces_expanded_is;
1096   PetscErrorCode      ierr;
1097 
1098   PetscFunctionBegin;
1099   ierr = DMGetDimension(ipdm, &dim);CHKERRQ(ierr);
1100   ierr = VecGetLocalSize(bnd->coordinates, &ncoords);CHKERRQ(ierr);
1101   ierr = VecToPetscReal_Private(bnd->coordinates, &rcoords);CHKERRQ(ierr);
1102   npoints = ncoords / dim;
1103   ierr = PetscMalloc1(npoints, &points);CHKERRQ(ierr);
1104   ierr = DMPlexFindVertices(ipdm, npoints, rcoords, 0.0, points);CHKERRQ(ierr);
1105   ierr = ISCreateGeneral(PETSC_COMM_SELF, npoints, points, PETSC_OWN_POINTER, &faces_expanded_is);CHKERRQ(ierr);
1106   ierr = DMPlexExpandedVerticesToFaces_Private(ipdm, faces_expanded_is, bnd->depth, bnd->sections, face_is);CHKERRQ(ierr);
1107   ierr = PetscFree(rcoords);CHKERRQ(ierr);
1108   ierr = ISDestroy(&faces_expanded_is);CHKERRQ(ierr);
1109   PetscFunctionReturn(0);
1110 }
1111 
1112 /* hack disabling DMPlexOrientInterface() call in DMPlexInterpolate() via -dm_plex_interpolate_orient_interfaces option */
1113 static PetscErrorCode DMPlexSetOrientInterface_Private(DM dm, PetscBool enable)
1114 {
1115   PetscOptions      options = NULL;
1116   const char        *prefix = NULL;
1117   const char        opt[] = "-dm_plex_interpolate_orient_interfaces";
1118   char              prefix_opt[512];
1119   PetscBool         flg, set;
1120   static PetscBool  wasSetTrue = PETSC_FALSE;
1121   PetscErrorCode    ierr;
1122 
1123   PetscFunctionBegin;
1124   if (dm) {
1125     ierr = PetscObjectGetOptionsPrefix((PetscObject)dm, &prefix);CHKERRQ(ierr);
1126     options = ((PetscObject)dm)->options;
1127   }
1128   ierr = PetscStrcpy(prefix_opt, "-");CHKERRQ(ierr);
1129   ierr = PetscStrlcat(prefix_opt, prefix, sizeof(prefix_opt));CHKERRQ(ierr);
1130   ierr = PetscStrlcat(prefix_opt, &opt[1], sizeof(prefix_opt));CHKERRQ(ierr);
1131   ierr = PetscOptionsGetBool(options, prefix, opt, &flg, &set);CHKERRQ(ierr);
1132   if (!enable) {
1133     if (set && flg) wasSetTrue = PETSC_TRUE;
1134     ierr = PetscOptionsSetValue(options, prefix_opt, "0");CHKERRQ(ierr);
1135   } else if (set && !flg) {
1136     if (wasSetTrue) {
1137       ierr = PetscOptionsSetValue(options, prefix_opt, "1");CHKERRQ(ierr);
1138     } else {
1139       /* default is PETSC_TRUE */
1140       ierr = PetscOptionsClearValue(options, prefix_opt);CHKERRQ(ierr);
1141     }
1142     wasSetTrue = PETSC_FALSE;
1143   }
1144 #if defined(PETSC_USE_DEBUG)
1145   {
1146     ierr = PetscOptionsGetBool(options, prefix, opt, &flg, &set);CHKERRQ(ierr);
1147     if (PetscUnlikely(set && flg != enable)) SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "PetscOptionsSetValue did not have the desired effect");
1148   }
1149 #endif
1150   PetscFunctionReturn(0);
1151 }
1152 
1153 /* get coordinate description of the whole-domain boundary */
1154 static PetscErrorCode DMPlexGetExpandedBoundary_Private(DM dm, PortableBoundary *boundary)
1155 {
1156   PortableBoundary       bnd0, bnd;
1157   MPI_Comm               comm;
1158   DM                     idm;
1159   DMLabel                label;
1160   PetscInt               d;
1161   const char             boundaryName[] = "DMPlexDistributeInterpolateMarkInterface_boundary";
1162   IS                     boundary_is;
1163   IS                     *boundary_expanded_iss;
1164   PetscMPIInt            rootrank = 0;
1165   PetscMPIInt            rank, size;
1166   PetscInt               value = 1;
1167   DMPlexInterpolatedFlag intp;
1168   PetscBool              flg;
1169   PetscErrorCode         ierr;
1170 
1171   PetscFunctionBegin;
1172   ierr = PetscNew(&bnd);CHKERRQ(ierr);
1173   ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr);
1174   ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
1175   ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr);
1176   ierr = DMPlexIsDistributed(dm, &flg);CHKERRQ(ierr);
1177   if (flg) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "serial DM (all points on one rank) needed");
1178 
1179   /* interpolate serial DM if not yet interpolated */
1180   ierr = DMPlexIsInterpolatedCollective(dm, &intp);CHKERRQ(ierr);
1181   if (intp == DMPLEX_INTERPOLATED_FULL) {
1182     idm = dm;
1183     ierr = PetscObjectReference((PetscObject)dm);CHKERRQ(ierr);
1184   } else {
1185     ierr = DMPlexInterpolate(dm, &idm);CHKERRQ(ierr);
1186     ierr = DMViewFromOptions(idm, NULL, "-idm_view");CHKERRQ(ierr);
1187   }
1188 
1189   /* mark whole-domain boundary of the serial DM */
1190   ierr = DMLabelCreate(PETSC_COMM_SELF, boundaryName, &label);CHKERRQ(ierr);
1191   ierr = DMAddLabel(idm, label);CHKERRQ(ierr);
1192   ierr = DMPlexMarkBoundaryFaces(idm, value, label);CHKERRQ(ierr);
1193   ierr = DMLabelViewFromOptionsOnComm_Private(label, "-idm_boundary_view", comm);CHKERRQ(ierr);
1194   ierr = DMLabelGetStratumIS(label, value, &boundary_is);CHKERRQ(ierr);
1195 
1196   /* translate to coordinates */
1197   ierr = PetscNew(&bnd0);CHKERRQ(ierr);
1198   ierr = DMGetCoordinatesLocalSetUp(idm);CHKERRQ(ierr);
1199   if (rank == rootrank) {
1200     ierr = DMPlexGetConeRecursive(idm, boundary_is, &bnd0->depth, &boundary_expanded_iss, &bnd0->sections);CHKERRQ(ierr);
1201     ierr = DMGetCoordinatesLocalTuple(dm, boundary_expanded_iss[0], NULL, &bnd0->coordinates);CHKERRQ(ierr);
1202     /* self-check */
1203     {
1204       IS is0;
1205       ierr = DMPlexExpandedVerticesCoordinatesToFaces_Private(idm, bnd0, &is0);CHKERRQ(ierr);
1206       ierr = ISEqual(is0, boundary_is, &flg);CHKERRQ(ierr);
1207       if (!flg) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_PLIB, "DMPlexExpandedVerticesCoordinatesToFaces_Private produced a wrong IS");
1208       ierr = ISDestroy(&is0);CHKERRQ(ierr);
1209     }
1210   } else {
1211     ierr = VecCreateSeq(PETSC_COMM_SELF, 0, &bnd0->coordinates);CHKERRQ(ierr);
1212   }
1213 
1214   {
1215     Vec         tmp;
1216     VecScatter  sc;
1217     IS          xis;
1218     PetscInt    n;
1219 
1220     /* just convert seq vectors to mpi vector */
1221     ierr = VecGetLocalSize(bnd0->coordinates, &n);CHKERRQ(ierr);
1222     ierr = MPI_Bcast(&n, 1, MPIU_INT, rootrank, comm);CHKERRQ(ierr);
1223     if (rank == rootrank) {
1224       ierr = VecCreateMPI(comm, n, n, &tmp);CHKERRQ(ierr);
1225     } else {
1226       ierr = VecCreateMPI(comm, 0, n, &tmp);CHKERRQ(ierr);
1227     }
1228     ierr = VecCopy(bnd0->coordinates, tmp);CHKERRQ(ierr);
1229     ierr = VecDestroy(&bnd0->coordinates);CHKERRQ(ierr);
1230     bnd0->coordinates = tmp;
1231 
1232     /* replicate coordinates from root rank to all ranks */
1233     ierr = VecCreateMPI(comm, n, n*size, &bnd->coordinates);CHKERRQ(ierr);
1234     ierr = ISCreateStride(comm, n, 0, 1, &xis);CHKERRQ(ierr);
1235     ierr = VecScatterCreate(bnd0->coordinates, xis, bnd->coordinates, NULL, &sc);CHKERRQ(ierr);
1236     ierr = VecScatterBegin(sc, bnd0->coordinates, bnd->coordinates, INSERT_VALUES, SCATTER_FORWARD);CHKERRQ(ierr);
1237     ierr = VecScatterEnd(  sc, bnd0->coordinates, bnd->coordinates, INSERT_VALUES, SCATTER_FORWARD);CHKERRQ(ierr);
1238     ierr = VecScatterDestroy(&sc);CHKERRQ(ierr);
1239     ierr = ISDestroy(&xis);CHKERRQ(ierr);
1240   }
1241   bnd->depth = bnd0->depth;
1242   ierr = MPI_Bcast(&bnd->depth, 1, MPIU_INT, rootrank, comm);CHKERRQ(ierr);
1243   ierr = PetscMalloc1(bnd->depth, &bnd->sections);CHKERRQ(ierr);
1244   for (d=0; d<bnd->depth; d++) {
1245     ierr = PetscSectionReplicate_Private(comm, rootrank, (rank == rootrank) ? bnd0->sections[d] : NULL, &bnd->sections[d]);CHKERRQ(ierr);
1246   }
1247 
1248   if (rank == rootrank) {
1249     ierr = DMPlexRestoreConeRecursive(idm, boundary_is, &bnd0->depth, &boundary_expanded_iss, &bnd0->sections);CHKERRQ(ierr);
1250   }
1251   ierr = PortableBoundaryDestroy(&bnd0);CHKERRQ(ierr);
1252   ierr = DMRemoveLabelBySelf(idm, &label, PETSC_TRUE);CHKERRQ(ierr);
1253   ierr = DMLabelDestroy(&label);CHKERRQ(ierr);
1254   ierr = ISDestroy(&boundary_is);CHKERRQ(ierr);
1255   ierr = DMDestroy(&idm);CHKERRQ(ierr);
1256   *boundary = bnd;
1257   PetscFunctionReturn(0);
1258 }
1259 
1260 /* get faces of inter-partition interface */
1261 static PetscErrorCode DMPlexGetInterfaceFaces_Private(DM ipdm, IS boundary_faces_is, IS *interface_faces_is)
1262 {
1263   MPI_Comm               comm;
1264   DMLabel                label;
1265   IS                     part_boundary_faces_is;
1266   const char             partBoundaryName[] = "DMPlexDistributeInterpolateMarkInterface_partBoundary";
1267   PetscInt               value = 1;
1268   DMPlexInterpolatedFlag intp;
1269   PetscErrorCode         ierr;
1270 
1271   PetscFunctionBegin;
1272   ierr = PetscObjectGetComm((PetscObject)ipdm, &comm);CHKERRQ(ierr);
1273   ierr = DMPlexIsInterpolatedCollective(ipdm, &intp);CHKERRQ(ierr);
1274   if (intp != DMPLEX_INTERPOLATED_FULL) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "only for fully interpolated DMPlex");
1275 
1276   /* get ipdm partition boundary (partBoundary) */
1277   ierr = DMLabelCreate(PETSC_COMM_SELF, partBoundaryName, &label);CHKERRQ(ierr);
1278   ierr = DMAddLabel(ipdm, label);CHKERRQ(ierr);
1279   ierr = DMPlexMarkBoundaryFaces(ipdm, value, label);CHKERRQ(ierr);
1280   ierr = DMLabelViewFromOptionsOnComm_Private(label, "-ipdm_part_boundary_view", comm);CHKERRQ(ierr);
1281   ierr = DMLabelGetStratumISOnComm_Private(label, value, comm, &part_boundary_faces_is);CHKERRQ(ierr);
1282   ierr = DMRemoveLabelBySelf(ipdm, &label, PETSC_TRUE);CHKERRQ(ierr);
1283   ierr = DMLabelDestroy(&label);CHKERRQ(ierr);
1284 
1285   /* remove ipdm whole-domain boundary (boundary_faces_is) from ipdm partition boundary (part_boundary_faces_is), resulting just in inter-partition interface */
1286   ierr = ISDifference(part_boundary_faces_is,boundary_faces_is,interface_faces_is);CHKERRQ(ierr);
1287   ierr = ISDestroy(&part_boundary_faces_is);CHKERRQ(ierr);
1288   PetscFunctionReturn(0);
1289 }
1290 
1291 /* compute inter-partition interface including edges and vertices */
1292 static PetscErrorCode DMPlexComputeCompleteInterface_Private(DM ipdm, IS interface_faces_is, IS *interface_is)
1293 {
1294   DMLabel                label;
1295   PetscInt               value = 1;
1296   const char             interfaceName[] = "DMPlexDistributeInterpolateMarkInterface_interface";
1297   DMPlexInterpolatedFlag intp;
1298   MPI_Comm               comm;
1299   PetscErrorCode         ierr;
1300 
1301   PetscFunctionBegin;
1302   ierr = PetscObjectGetComm((PetscObject)ipdm, &comm);CHKERRQ(ierr);
1303   ierr = DMPlexIsInterpolatedCollective(ipdm, &intp);CHKERRQ(ierr);
1304   if (intp != DMPLEX_INTERPOLATED_FULL) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "only for fully interpolated DMPlex");
1305 
1306   ierr = DMLabelCreate(PETSC_COMM_SELF, interfaceName, &label);CHKERRQ(ierr);
1307   ierr = DMAddLabel(ipdm, label);CHKERRQ(ierr);
1308   ierr = DMLabelSetStratumIS(label, value, interface_faces_is);CHKERRQ(ierr);
1309   ierr = DMLabelViewFromOptionsOnComm_Private(label, "-interface_faces_view", comm);CHKERRQ(ierr);
1310   ierr = DMPlexLabelComplete(ipdm, label);CHKERRQ(ierr);
1311   ierr = DMLabelViewFromOptionsOnComm_Private(label, "-interface_view", comm);CHKERRQ(ierr);
1312   ierr = DMLabelGetStratumISOnComm_Private(label, value, comm, interface_is);CHKERRQ(ierr);
1313   ierr = PetscObjectSetName((PetscObject)*interface_is, "interface_is");CHKERRQ(ierr);
1314   ierr = ISViewFromOptions(*interface_is, NULL, "-interface_is_view");CHKERRQ(ierr);
1315   ierr = DMRemoveLabelBySelf(ipdm, &label, PETSC_TRUE);CHKERRQ(ierr);
1316   ierr = DMLabelDestroy(&label);CHKERRQ(ierr);
1317   PetscFunctionReturn(0);
1318 }
1319 
1320 static PetscErrorCode PointSFGetOutwardInterfacePoints(PetscSF sf, IS *is)
1321 {
1322   PetscInt        n;
1323   const PetscInt  *arr;
1324   PetscErrorCode  ierr;
1325 
1326   PetscFunctionBegin;
1327   ierr = PetscSFGetGraph(sf, NULL, &n, &arr, NULL);CHKERRQ(ierr);
1328   ierr = ISCreateGeneral(PetscObjectComm((PetscObject)sf), n, arr, PETSC_USE_POINTER, is);CHKERRQ(ierr);
1329   PetscFunctionReturn(0);
1330 }
1331 
1332 static PetscErrorCode PointSFGetInwardInterfacePoints(PetscSF sf, IS *is)
1333 {
1334   PetscInt        n;
1335   const PetscInt  *rootdegree;
1336   PetscInt        *arr;
1337   PetscErrorCode  ierr;
1338 
1339   PetscFunctionBegin;
1340   ierr = PetscSFSetUp(sf);CHKERRQ(ierr);
1341   ierr = PetscSFComputeDegreeBegin(sf, &rootdegree);CHKERRQ(ierr);
1342   ierr = PetscSFComputeDegreeEnd(sf, &rootdegree);CHKERRQ(ierr);
1343   ierr = PetscSFComputeMultiRootOriginalNumbering(sf, rootdegree, &n, &arr);CHKERRQ(ierr);
1344   ierr = ISCreateGeneral(PetscObjectComm((PetscObject)sf), n, arr, PETSC_OWN_POINTER, is);CHKERRQ(ierr);
1345   PetscFunctionReturn(0);
1346 }
1347 
1348 static PetscErrorCode PointSFGetInterfacePoints_Private(PetscSF pointSF, IS *is)
1349 {
1350   IS pointSF_out_is, pointSF_in_is;
1351   PetscErrorCode  ierr;
1352 
1353   PetscFunctionBegin;
1354   ierr = PointSFGetOutwardInterfacePoints(pointSF, &pointSF_out_is);CHKERRQ(ierr);
1355   ierr = PointSFGetInwardInterfacePoints(pointSF, &pointSF_in_is);CHKERRQ(ierr);
1356   ierr = ISExpand(pointSF_out_is, pointSF_in_is, is);CHKERRQ(ierr);
1357   ierr = ISDestroy(&pointSF_out_is);CHKERRQ(ierr);
1358   ierr = ISDestroy(&pointSF_in_is);CHKERRQ(ierr);
1359   PetscFunctionReturn(0);
1360 }
1361 
1362 #define MYCHKERRQ(ierr) do {if (PetscUnlikely(ierr)) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_PLIB, "PointSF is wrong. Unable to show details!");} while (0)
1363 
1364 static PetscErrorCode ViewPointsWithType_Internal(DM dm, IS pointsIS, PetscViewer v)
1365 {
1366   DMLabel         label;
1367   PetscSection    coordsSection;
1368   Vec             coordsVec;
1369   PetscScalar     *coordsScalar;
1370   PetscInt        coneSize, depth, dim, i, p, npoints;
1371   const PetscInt  *points;
1372   PetscErrorCode  ierr;
1373 
1374   PetscFunctionBegin;
1375   ierr = DMGetDimension(dm, &dim);CHKERRQ(ierr);
1376   ierr = DMGetCoordinateSection(dm, &coordsSection);CHKERRQ(ierr);
1377   ierr = DMGetCoordinatesLocal(dm, &coordsVec);CHKERRQ(ierr);
1378   ierr = VecGetArray(coordsVec, &coordsScalar);CHKERRQ(ierr);
1379   ierr = ISGetLocalSize(pointsIS, &npoints);CHKERRQ(ierr);
1380   ierr = ISGetIndices(pointsIS, &points);CHKERRQ(ierr);
1381   ierr = DMPlexGetDepthLabel(dm, &label);CHKERRQ(ierr);
1382   ierr = PetscViewerASCIIPushTab(v);CHKERRQ(ierr);
1383   for (i=0; i<npoints; i++) {
1384     p = points[i];
1385     ierr = DMLabelGetValue(label, p, &depth);CHKERRQ(ierr);
1386     if (!depth) {
1387       PetscInt        c, n, o;
1388       PetscReal       coords[3];
1389       char            coordstr[128];
1390 
1391       ierr = PetscSectionGetDof(coordsSection, p, &n);CHKERRQ(ierr);
1392       ierr = PetscSectionGetOffset(coordsSection, p, &o);CHKERRQ(ierr);
1393       for (c=0; c<n; c++) coords[c] = PetscRealPart(coordsScalar[o+c]);
1394       ierr = coord2str(coordstr, sizeof(coordstr), n, coords, 1.0);CHKERRQ(ierr);
1395       ierr = PetscViewerASCIISynchronizedPrintf(v, "vertex %D w/ coordinates %s\n", p, coordstr);CHKERRQ(ierr);
1396     } else {
1397       char            entityType[16];
1398 
1399       switch (depth) {
1400         case 1: ierr = PetscStrcpy(entityType, "edge");CHKERRQ(ierr); break;
1401         case 2: ierr = PetscStrcpy(entityType, "face");CHKERRQ(ierr); break;
1402         case 3: ierr = PetscStrcpy(entityType, "cell");CHKERRQ(ierr); break;
1403         default: SETERRQ(PetscObjectComm((PetscObject)v), PETSC_ERR_SUP, "Only for depth <= 3");CHKERRQ(ierr);
1404       }
1405       if (depth == dim && dim < 3) {
1406         ierr = PetscStrlcat(entityType, " (cell)", sizeof(entityType));CHKERRQ(ierr);
1407       }
1408       ierr = PetscViewerASCIISynchronizedPrintf(v, "%s %D\n", entityType, p);CHKERRQ(ierr);
1409     }
1410     ierr = DMPlexGetConeSize(dm, p, &coneSize);CHKERRQ(ierr);
1411     if (coneSize) {
1412       const PetscInt *cone;
1413       IS             coneIS;
1414 
1415       ierr = DMPlexGetCone(dm, p, &cone);CHKERRQ(ierr);
1416       ierr = ISCreateGeneral(PETSC_COMM_SELF, coneSize, cone, PETSC_USE_POINTER, &coneIS);CHKERRQ(ierr);
1417       ierr = ViewPointsWithType_Internal(dm, coneIS, v);CHKERRQ(ierr);
1418       ierr = ISDestroy(&coneIS);CHKERRQ(ierr);
1419     }
1420   }
1421   ierr = PetscViewerASCIIPopTab(v);CHKERRQ(ierr);
1422   ierr = VecRestoreArray(coordsVec, &coordsScalar);CHKERRQ(ierr);
1423   ierr = ISRestoreIndices(pointsIS, &points);CHKERRQ(ierr);
1424   PetscFunctionReturn(0);
1425 }
1426 
1427 static PetscErrorCode ViewPointsWithType(DM dm, IS points, PetscViewer v)
1428 {
1429   PetscBool       flg;
1430   PetscInt        npoints;
1431   PetscMPIInt     rank;
1432   PetscErrorCode  ierr;
1433 
1434   PetscFunctionBegin;
1435   ierr = PetscObjectTypeCompare((PetscObject)v, PETSCVIEWERASCII, &flg);CHKERRQ(ierr);
1436   if (!flg) SETERRQ(PetscObjectComm((PetscObject)v), PETSC_ERR_SUP, "Only for ASCII viewer");CHKERRQ(ierr);
1437   ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)v), &rank);CHKERRQ(ierr);
1438   ierr = PetscViewerASCIIPushSynchronized(v);CHKERRQ(ierr);
1439   ierr = ISGetLocalSize(points, &npoints);CHKERRQ(ierr);
1440   if (npoints) {
1441     ierr = PetscViewerASCIISynchronizedPrintf(v, "[%d] --------\n", rank);CHKERRQ(ierr);
1442     ierr = ViewPointsWithType_Internal(dm, points, v);CHKERRQ(ierr);
1443   }
1444   ierr = PetscViewerFlush(v);CHKERRQ(ierr);
1445   ierr = PetscViewerASCIIPopSynchronized(v);CHKERRQ(ierr);
1446   PetscFunctionReturn(0);
1447 }
1448 
1449 static PetscErrorCode DMPlexComparePointSFWithInterface_Private(DM ipdm, IS interface_is)
1450 {
1451   PetscSF         pointsf;
1452   IS              pointsf_is;
1453   PetscBool       flg;
1454   MPI_Comm        comm;
1455   PetscMPIInt     size;
1456   PetscErrorCode  ierr;
1457 
1458   PetscFunctionBegin;
1459   ierr = PetscObjectGetComm((PetscObject)ipdm, &comm);CHKERRQ(ierr);
1460   ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr);
1461   ierr = DMGetPointSF(ipdm, &pointsf);CHKERRQ(ierr);
1462   if (pointsf) {
1463     PetscInt nroots;
1464     ierr = PetscSFGetGraph(pointsf, &nroots, NULL, NULL, NULL);CHKERRQ(ierr);
1465     if (nroots < 0) pointsf = NULL; /* uninitialized SF */
1466   }
1467   if (!pointsf) {
1468     PetscInt N=0;
1469     if (interface_is) {ierr = ISGetSize(interface_is, &N);CHKERRQ(ierr);}
1470     if (N) SETERRQ(comm, PETSC_ERR_PLIB, "interface_is should be NULL or empty for PointSF being NULL");
1471     PetscFunctionReturn(0);
1472   }
1473 
1474   /* get PointSF points as IS pointsf_is */
1475   ierr = PointSFGetInterfacePoints_Private(pointsf, &pointsf_is);CHKERRQ(ierr);
1476 
1477   /* compare pointsf_is with interface_is */
1478   ierr = ISEqual(interface_is, pointsf_is, &flg);CHKERRQ(ierr);
1479   ierr = MPI_Allreduce(MPI_IN_PLACE,&flg,1,MPIU_BOOL,MPI_LAND,comm);CHKERRQ(ierr);
1480   if (!flg) {
1481     IS pointsf_extra_is, pointsf_missing_is;
1482     PetscViewer errv = PETSC_VIEWER_STDERR_(comm);
1483     ierr = ISDifference(interface_is, pointsf_is, &pointsf_missing_is);MYCHKERRQ(ierr);
1484     ierr = ISDifference(pointsf_is, interface_is, &pointsf_extra_is);MYCHKERRQ(ierr);
1485     ierr = PetscViewerASCIIPrintf(errv, "Points missing in PointSF:\n");MYCHKERRQ(ierr);
1486     ierr = ViewPointsWithType(ipdm, pointsf_missing_is, errv);MYCHKERRQ(ierr);
1487     ierr = PetscViewerASCIIPrintf(errv, "Extra points in PointSF:\n");MYCHKERRQ(ierr);
1488     ierr = ViewPointsWithType(ipdm, pointsf_extra_is, errv);MYCHKERRQ(ierr);
1489     ierr = ISDestroy(&pointsf_extra_is);MYCHKERRQ(ierr);
1490     ierr = ISDestroy(&pointsf_missing_is);MYCHKERRQ(ierr);
1491     SETERRQ(comm, PETSC_ERR_PLIB, "PointSF is wrong! See details above.");
1492   }
1493   ierr = ISDestroy(&pointsf_is);CHKERRQ(ierr);
1494   PetscFunctionReturn(0);
1495 }
1496 
1497 /* remove faces & edges from label, leave just vertices */
1498 static PetscErrorCode DMPlexISFilterVertices_Private(DM dm, IS points)
1499 {
1500   PetscInt        vStart, vEnd;
1501   MPI_Comm        comm;
1502   PetscErrorCode  ierr;
1503 
1504   PetscFunctionBegin;
1505   ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr);
1506   ierr = DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);CHKERRQ(ierr);
1507   ierr = ISGeneralFilter(points, vStart, vEnd);CHKERRQ(ierr);
1508   PetscFunctionReturn(0);
1509 }
1510 
1511 /*
1512   DMPlexCheckPointSFHeavy - Thorough test that the PointSF after parallel DMPlexInterpolate() includes exactly all interface points.
1513 
1514   Collective
1515 
1516   Input Parameters:
1517 . dm - The DMPlex object
1518 
1519   Notes:
1520   The input DMPlex must be serial (one partition has all points, the other partitions have no points).
1521   This is a heavy test which involves DMPlexInterpolate() if the input DM is not interpolated yet, and depends on having a representation of the whole-domain boundary (PortableBoundary), which can be obtained only by DMPlexGetExpandedBoundary_Private() (which involves DMPlexInterpolate() of a sequential DM).
1522   This is mainly intended for debugging/testing purposes.
1523 
1524   Algorithm:
1525   1. boundary faces of the serial version of the whole mesh are found using DMPlexMarkBoundaryFaces()
1526   2. boundary faces are translated into vertices using DMPlexGetConeRecursive() and these are translated into coordinates - this description (aka PortableBoundary) is completely independent of partitioning and point numbering
1527   3. the mesh is distributed or loaded in parallel
1528   4. boundary faces of the distributed mesh are reconstructed from PortableBoundary using DMPlexFindVertices()
1529   5. partition boundary faces of the parallel mesh are found using DMPlexMarkBoundaryFaces()
1530   6. partition interfaces are computed as set difference of partition boundary faces minus the reconstructed boundary
1531   7. check that interface covered by PointSF (union of inward and outward points) is equal to the partition interface for each rank, otherwise print the difference and throw an error
1532 
1533   Level: developer
1534 
1535 .seealso: DMGetPointSF(), DMPlexCheckSymmetry(), DMPlexCheckSkeleton(), DMPlexCheckFaces()
1536 */
1537 static PetscErrorCode DMPlexCheckPointSFHeavy(DM dm, PortableBoundary bnd)
1538 {
1539   DM                     ipdm=NULL;
1540   IS                     boundary_faces_is, interface_faces_is, interface_is;
1541   DMPlexInterpolatedFlag intp;
1542   MPI_Comm               comm;
1543   PetscErrorCode         ierr;
1544 
1545   PetscFunctionBegin;
1546   ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr);
1547 
1548   ierr = DMPlexIsInterpolatedCollective(dm, &intp);CHKERRQ(ierr);
1549   if (intp == DMPLEX_INTERPOLATED_FULL) {
1550     ipdm = dm;
1551   } else {
1552     /* create temporary interpolated DM if input DM is not interpolated */
1553     ierr = DMPlexSetOrientInterface_Private(dm, PETSC_FALSE);CHKERRQ(ierr);
1554     ierr = DMPlexInterpolate(dm, &ipdm);CHKERRQ(ierr); /* with DMPlexOrientInterface_Internal() call skipped so that PointSF issues are left to DMPlexComparePointSFWithInterface_Private() below */
1555     ierr = DMPlexSetOrientInterface_Private(dm, PETSC_TRUE);CHKERRQ(ierr);
1556   }
1557   ierr = DMViewFromOptions(ipdm, NULL, "-ipdm_view");CHKERRQ(ierr);
1558 
1559   /* recover ipdm whole-domain boundary faces from the expanded vertices coordinates */
1560   ierr = DMPlexExpandedVerticesCoordinatesToFaces_Private(ipdm, bnd, &boundary_faces_is);CHKERRQ(ierr);
1561   /* get inter-partition interface faces (interface_faces_is)*/
1562   ierr = DMPlexGetInterfaceFaces_Private(ipdm, boundary_faces_is, &interface_faces_is);CHKERRQ(ierr);
1563   /* compute inter-partition interface including edges and vertices (interface_is) */
1564   ierr = DMPlexComputeCompleteInterface_Private(ipdm, interface_faces_is, &interface_is);CHKERRQ(ierr);
1565   /* destroy immediate ISs */
1566   ierr = ISDestroy(&boundary_faces_is);CHKERRQ(ierr);
1567   ierr = ISDestroy(&interface_faces_is);CHKERRQ(ierr);
1568 
1569   /* for uninterpolated case, keep just vertices in interface */
1570   if (!intp) {
1571     ierr = DMPlexISFilterVertices_Private(ipdm, interface_is);CHKERRQ(ierr);
1572     ierr = DMDestroy(&ipdm);CHKERRQ(ierr);
1573   }
1574 
1575   /* compare PointSF with the boundary reconstructed from coordinates */
1576   ierr = DMPlexComparePointSFWithInterface_Private(dm, interface_is);CHKERRQ(ierr);
1577   ierr = PetscPrintf(comm, "DMPlexCheckPointSFHeavy PASSED\n");CHKERRQ(ierr);
1578   ierr = ISDestroy(&interface_is);CHKERRQ(ierr);
1579   PetscFunctionReturn(0);
1580 }
1581 
1582 int main(int argc, char **argv)
1583 {
1584   DM             dm;
1585   AppCtx         user;
1586   PetscErrorCode ierr;
1587 
1588   ierr = PetscInitialize(&argc, &argv, NULL, help);if (ierr) return ierr;
1589   ierr = PetscLogStageRegister("create",&stage[0]);CHKERRQ(ierr);
1590   ierr = PetscLogStageRegister("distribute",&stage[1]);CHKERRQ(ierr);
1591   ierr = PetscLogStageRegister("interpolate",&stage[2]);CHKERRQ(ierr);
1592   ierr = ProcessOptions(PETSC_COMM_WORLD, &user);CHKERRQ(ierr);
1593   ierr = CreateMesh(PETSC_COMM_WORLD, &user, &dm);CHKERRQ(ierr);
1594   if (user.nPointsToExpand) {
1595     ierr = TestExpandPoints(dm, &user);CHKERRQ(ierr);
1596   }
1597   if (user.ncoords) {
1598     ierr = ViewVerticesFromCoords(dm, user.ncoords/user.dim, user.coords, user.coordsTol, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
1599   }
1600   ierr = DMDestroy(&dm);CHKERRQ(ierr);
1601   ierr = PetscFinalize();
1602   return ierr;
1603 }
1604 
1605 /*TEST
1606 
1607   testset:
1608     nsize: 2
1609     args: -dm_view ascii::ascii_info_detail
1610     args: -dm_plex_check_all
1611     test:
1612       suffix: 1_tri_dist0
1613       args: -distribute 0 -interpolate {{none create}separate output}
1614     test:
1615       suffix: 1_tri_dist1
1616       args: -distribute 1 -interpolate {{none create after_distribute}separate output}
1617     test:
1618       suffix: 1_quad_dist0
1619       args: -cell_simplex 0 -distribute 0 -interpolate {{none create}separate output}
1620     test:
1621       suffix: 1_quad_dist1
1622       args: -cell_simplex 0 -distribute 1 -interpolate {{none create after_distribute}separate output}
1623     test:
1624       suffix: 1_1d_dist1
1625       args: -dim 1 -distribute 1
1626 
1627   testset:
1628     nsize: 3
1629     args: -testnum 1 -interpolate create
1630     args: -dm_plex_check_all
1631     test:
1632       suffix: 2
1633       args: -dm_view ascii::ascii_info_detail
1634     test:
1635       suffix: 2a
1636       args: -dm_plex_check_cones_conform_on_interfaces_verbose
1637     test:
1638       suffix: 2b
1639       args: -test_expand_points 0,1,2,5,6
1640     test:
1641       suffix: 2c
1642       args: -test_expand_points 0,1,2,5,6 -test_expand_points_empty
1643 
1644   testset:
1645     # the same as 1% for 3D
1646     nsize: 2
1647     args: -dim 3 -dm_view ascii::ascii_info_detail
1648     args: -dm_plex_check_all
1649     test:
1650       suffix: 4_tet_dist0
1651       args: -distribute 0 -interpolate {{none create}separate output}
1652     test:
1653       suffix: 4_tet_dist1
1654       args: -distribute 1 -interpolate {{none create after_distribute}separate output}
1655     test:
1656       suffix: 4_hex_dist0
1657       args: -cell_simplex 0 -distribute 0 -interpolate {{none create}separate output}
1658     test:
1659       suffix: 4_hex_dist1
1660       args: -cell_simplex 0 -distribute 1 -interpolate {{none create after_distribute}separate output}
1661 
1662   test:
1663     # the same as 4_tet_dist0 but test different initial orientations
1664     suffix: 4_tet_test_orient
1665     nsize: 2
1666     args: -dim 3 -distribute 0
1667     args: -dm_plex_check_all
1668     args: -rotate_interface_0 {{0 1 2 11 12 13}}
1669     args: -rotate_interface_1 {{0 1 2 11 12 13}}
1670 
1671   testset:
1672     requires: exodusii
1673     args: -filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/TwoQuads.exo
1674     args: -dm_view ascii::ascii_info_detail
1675     args: -dm_plex_check_all
1676     args: -custom_view
1677     test:
1678       suffix: 5_seq
1679       nsize: 1
1680       args: -distribute 0 -interpolate {{none create}separate output}
1681     test:
1682       suffix: 5_dist0
1683       nsize: 2
1684       args: -distribute 0 -interpolate {{none create}separate output}
1685     test:
1686       suffix: 5_dist1
1687       nsize: 2
1688       args: -distribute 1 -interpolate {{none create after_distribute}separate output}
1689 
1690   testset:
1691     nsize: {{1 2 4}}
1692     args: -use_generator
1693     args: -dm_plex_check_all
1694     args: -distribute -interpolate none
1695     test:
1696       suffix: 6_tri
1697       requires: triangle
1698       args: -faces {{2,2  1,3  7,4}} -cell_simplex 1 -dm_plex_generator triangle
1699     test:
1700       suffix: 6_quad
1701       args: -faces {{2,2  1,3  7,4}} -cell_simplex 0
1702     test:
1703       suffix: 6_tet
1704       requires: ctetgen
1705       args: -faces {{2,2,2  1,3,5  3,4,7}} -cell_simplex 1 -dm_plex_generator ctetgen
1706     test:
1707       suffix: 6_hex
1708       args: -faces {{2,2,2  1,3,5  3,4,7}} -cell_simplex 0
1709   testset:
1710     nsize: {{1 2 4}}
1711     args: -use_generator
1712     args: -dm_plex_check_all
1713     args: -distribute -interpolate create
1714     test:
1715       suffix: 6_int_tri
1716       requires: triangle
1717       args: -faces {{2,2  1,3  7,4}} -cell_simplex 1 -dm_plex_generator triangle
1718     test:
1719       suffix: 6_int_quad
1720       args: -faces {{2,2  1,3  7,4}} -cell_simplex 0
1721     test:
1722       suffix: 6_int_tet
1723       requires: ctetgen
1724       args: -faces {{2,2,2  1,3,5  3,4,7}} -cell_simplex 1 -dm_plex_generator ctetgen
1725     test:
1726       suffix: 6_int_hex
1727       args: -faces {{2,2,2  1,3,5  3,4,7}} -cell_simplex 0
1728   testset:
1729     nsize: {{2 4}}
1730     args: -use_generator
1731     args: -dm_plex_check_all
1732     args: -distribute -interpolate after_distribute
1733     test:
1734       suffix: 6_parint_tri
1735       requires: triangle
1736       args: -faces {{2,2  1,3  7,4}} -cell_simplex 1 -dm_plex_generator triangle
1737     test:
1738       suffix: 6_parint_quad
1739       args: -faces {{2,2  1,3  7,4}} -cell_simplex 0
1740     test:
1741       suffix: 6_parint_tet
1742       requires: ctetgen
1743       args: -faces {{2,2,2  1,3,5  3,4,7}} -cell_simplex 1 -dm_plex_generator ctetgen
1744     test:
1745       suffix: 6_parint_hex
1746       args: -faces {{2,2,2  1,3,5  3,4,7}} -cell_simplex 0
1747 
1748   testset: # 7 EXODUS
1749     requires: exodusii
1750     args: -dm_plex_check_all
1751     args: -filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/blockcylinder-50.exo
1752     args: -distribute
1753     test: # seq load, simple partitioner
1754       suffix: 7_exo
1755       nsize: {{1 2 4 5}}
1756       args: -interpolate none
1757     test: # seq load, seq interpolation, simple partitioner
1758       suffix: 7_exo_int_simple
1759       nsize: {{1 2 4 5}}
1760       args: -interpolate create
1761     test: # seq load, seq interpolation, metis partitioner
1762       suffix: 7_exo_int_metis
1763       requires: parmetis
1764       nsize: {{2 4 5}}
1765       args: -interpolate create
1766       args: -petscpartitioner_type parmetis
1767     test: # seq load, simple partitioner, par interpolation
1768       suffix: 7_exo_simple_int
1769       nsize: {{2 4 5}}
1770       args: -interpolate after_distribute
1771     test: # seq load, metis partitioner, par interpolation
1772       suffix: 7_exo_metis_int
1773       requires: parmetis
1774       nsize: {{2 4 5}}
1775       args: -interpolate after_distribute
1776       args: -petscpartitioner_type parmetis
1777 
1778   testset: # 7 HDF5 SEQUANTIAL LOAD
1779     requires: hdf5 !complex
1780     args: -dm_plex_check_all
1781     args: -filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/blockcylinder-50.h5 -dm_plex_create_from_hdf5_xdmf
1782     args: -dm_plex_hdf5_force_sequential
1783     args: -distribute
1784     test: # seq load, simple partitioner
1785       suffix: 7_seq_hdf5_simple
1786       nsize: {{1 2 4 5}}
1787       args: -interpolate none
1788     test: # seq load, seq interpolation, simple partitioner
1789       suffix: 7_seq_hdf5_int_simple
1790       nsize: {{1 2 4 5}}
1791       args: -interpolate after_create
1792     test: # seq load, seq interpolation, metis partitioner
1793       nsize: {{2 4 5}}
1794       suffix: 7_seq_hdf5_int_metis
1795       requires: parmetis
1796       args: -interpolate after_create
1797       args: -petscpartitioner_type parmetis
1798     test: # seq load, simple partitioner, par interpolation
1799       suffix: 7_seq_hdf5_simple_int
1800       nsize: {{2 4 5}}
1801       args: -interpolate after_distribute
1802     test: # seq load, metis partitioner, par interpolation
1803       nsize: {{2 4 5}}
1804       suffix: 7_seq_hdf5_metis_int
1805       requires: parmetis
1806       args: -interpolate after_distribute
1807       args: -petscpartitioner_type parmetis
1808 
1809   testset: # 7 HDF5 PARALLEL LOAD
1810     requires: hdf5 !complex
1811     nsize: {{2 4 5}}
1812     args: -dm_plex_check_all
1813     args: -filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/blockcylinder-50.h5 -dm_plex_create_from_hdf5_xdmf
1814     test: # par load
1815       suffix: 7_par_hdf5
1816       args: -interpolate none
1817     test: # par load, par interpolation
1818       suffix: 7_par_hdf5_int
1819       args: -interpolate after_create
1820     test: # par load, parmetis repartitioner
1821       TODO: Parallel partitioning of uninterpolated meshes not supported
1822       suffix: 7_par_hdf5_parmetis
1823       requires: parmetis
1824       args: -distribute -petscpartitioner_type parmetis
1825       args: -interpolate none
1826     test: # par load, par interpolation, parmetis repartitioner
1827       suffix: 7_par_hdf5_int_parmetis
1828       requires: parmetis
1829       args: -distribute -petscpartitioner_type parmetis
1830       args: -interpolate after_create
1831     test: # par load, parmetis partitioner, par interpolation
1832       TODO: Parallel partitioning of uninterpolated meshes not supported
1833       suffix: 7_par_hdf5_parmetis_int
1834       requires: parmetis
1835       args: -distribute -petscpartitioner_type parmetis
1836       args: -interpolate after_distribute
1837 
1838     test:
1839       suffix: 7_hdf5_hierarch
1840       requires: hdf5 ptscotch !complex
1841       nsize: {{2 3 4}separate output}
1842       args: -distribute
1843       args: -interpolate after_create
1844       args: -petscpartitioner_type matpartitioning -petscpartitioner_view ::ascii_info
1845       args: -mat_partitioning_type hierarch -mat_partitioning_hierarchical_nfineparts 2
1846       args: -mat_partitioning_hierarchical_coarseparttype ptscotch -mat_partitioning_hierarchical_fineparttype ptscotch
1847 
1848   test:
1849     suffix: 8
1850     requires: hdf5 !complex
1851     nsize: 4
1852     args: -filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/blockcylinder-50.h5 -dm_plex_create_from_hdf5_xdmf
1853     args: -distribute 0 -interpolate after_create
1854     args: -view_vertices_from_coords 0.,1.,0.,-0.5,1.,0.,0.583,-0.644,0.,-2.,-2.,-2. -view_vertices_from_coords_tol 1e-3
1855     args: -dm_plex_check_all
1856     args: -custom_view
1857 
1858   testset: # 9 HDF5 SEQUANTIAL LOAD
1859     requires: hdf5 !complex datafilespath
1860     args: -dm_plex_check_all
1861     args: -filename ${DATAFILESPATH}/meshes/cube-hexahedra-refined.h5 -dm_plex_create_from_hdf5_xdmf -dm_plex_hdf5_topology_path /cells -dm_plex_hdf5_geometry_path /coordinates
1862     args: -dm_plex_hdf5_force_sequential
1863     args: -distribute
1864     test: # seq load, simple partitioner
1865       suffix: 9_seq_hdf5_simple
1866       nsize: {{1 2 4 5}}
1867       args: -interpolate none
1868     test: # seq load, seq interpolation, simple partitioner
1869       suffix: 9_seq_hdf5_int_simple
1870       nsize: {{1 2 4 5}}
1871       args: -interpolate after_create
1872     test: # seq load, seq interpolation, metis partitioner
1873       nsize: {{2 4 5}}
1874       suffix: 9_seq_hdf5_int_metis
1875       requires: parmetis
1876       args: -interpolate after_create
1877       args: -petscpartitioner_type parmetis
1878     test: # seq load, simple partitioner, par interpolation
1879       suffix: 9_seq_hdf5_simple_int
1880       nsize: {{2 4 5}}
1881       args: -interpolate after_distribute
1882     test: # seq load, simple partitioner, par interpolation
1883       # This is like 9_seq_hdf5_simple_int but testing error output of DMPlexCheckPointSFHeavy().
1884       # Once 9_seq_hdf5_simple_int gets fixed, this one gets broken.
1885       # We can then provide an intentionally broken mesh instead.
1886       TODO: This test is broken because PointSF is fixed.
1887       suffix: 9_seq_hdf5_simple_int_err
1888       nsize: 4
1889       args: -interpolate after_distribute
1890       filter: sed -e "/PETSC ERROR/,$$d"
1891     test: # seq load, metis partitioner, par interpolation
1892       nsize: {{2 4 5}}
1893       suffix: 9_seq_hdf5_metis_int
1894       requires: parmetis
1895       args: -interpolate after_distribute
1896       args: -petscpartitioner_type parmetis
1897 
1898   testset: # 9 HDF5 PARALLEL LOAD
1899     requires: hdf5 !complex datafilespath
1900     nsize: {{2 4 5}}
1901     args: -dm_plex_check_all
1902     args: -filename ${DATAFILESPATH}/meshes/cube-hexahedra-refined.h5 -dm_plex_create_from_hdf5_xdmf -dm_plex_hdf5_topology_path /cells -dm_plex_hdf5_geometry_path /coordinates
1903     test: # par load
1904       suffix: 9_par_hdf5
1905       args: -interpolate none
1906     test: # par load, par interpolation
1907       suffix: 9_par_hdf5_int
1908       args: -interpolate after_create
1909     test: # par load, parmetis repartitioner
1910       TODO: Parallel partitioning of uninterpolated meshes not supported
1911       suffix: 9_par_hdf5_parmetis
1912       requires: parmetis
1913       args: -distribute -petscpartitioner_type parmetis
1914       args: -interpolate none
1915     test: # par load, par interpolation, parmetis repartitioner
1916       suffix: 9_par_hdf5_int_parmetis
1917       requires: parmetis
1918       args: -distribute -petscpartitioner_type parmetis
1919       args: -interpolate after_create
1920     test: # par load, parmetis partitioner, par interpolation
1921       TODO: Parallel partitioning of uninterpolated meshes not supported
1922       suffix: 9_par_hdf5_parmetis_int
1923       requires: parmetis
1924       args: -distribute -petscpartitioner_type parmetis
1925       args: -interpolate after_distribute
1926 
1927   testset: # 10 HDF5 PARALLEL LOAD
1928     requires: hdf5 !complex datafilespath
1929     nsize: {{2 4 7}}
1930     args: -dm_plex_check_all
1931     args: -filename ${DATAFILESPATH}/meshes/cube-hexahedra-refined2.h5 -dm_plex_create_from_hdf5_xdmf -dm_plex_hdf5_topology_path /topo -dm_plex_hdf5_geometry_path /geom
1932     test: # par load, par interpolation
1933       suffix: 10_par_hdf5_int
1934       args: -interpolate after_create
1935 TEST*/
1936