Actual source code: ex24.c
1: static char help[] = "Test that MatPartitioning and PetscPartitioner interfaces are equivalent when using PETSCPARTITIONERMATPARTITIONING\n\n";
2: static char FILENAME[] = "ex24.c";
4: #include <petscdmplex.h>
5: #include <petscviewerhdf5.h>
7: #if PetscDefined(HAVE_PTSCOTCH)
8: EXTERN_C_BEGIN
9: #include <ptscotch.h>
10: EXTERN_C_END
11: #endif
13: typedef struct {
14: PetscBool compare_is; /* Compare ISs and PetscSections */
15: PetscBool compare_dm; /* Compare DM */
16: PetscBool tpw; /* Use target partition weights */
17: char partitioning[64];
18: char repartitioning[64];
19: } AppCtx;
21: static PetscErrorCode ProcessOptions(MPI_Comm comm, AppCtx *options)
22: {
23: PetscBool repartition = PETSC_TRUE;
25: PetscFunctionBegin;
26: options->compare_is = PETSC_FALSE;
27: options->compare_dm = PETSC_FALSE;
29: PetscOptionsBegin(comm, "", "Meshing Interpolation Test Options", "DMPLEX");
30: PetscCall(PetscOptionsBool("-compare_is", "Compare ISs and PetscSections?", FILENAME, options->compare_is, &options->compare_is, NULL));
31: PetscCall(PetscOptionsBool("-compare_dm", "Compare DMs?", FILENAME, options->compare_dm, &options->compare_dm, NULL));
32: PetscCall(PetscStrncpy(options->partitioning, MATPARTITIONINGPARMETIS, sizeof(options->partitioning)));
33: PetscCall(PetscOptionsString("-partitioning", "The mat partitioning type to test", "None", options->partitioning, options->partitioning, sizeof(options->partitioning), NULL));
34: PetscCall(PetscOptionsBool("-repartition", "Partition again after the first partition?", FILENAME, repartition, &repartition, NULL));
35: if (repartition) {
36: PetscCall(PetscStrncpy(options->repartitioning, MATPARTITIONINGPARMETIS, 64));
37: PetscCall(PetscOptionsString("-repartitioning", "The mat partitioning type to test (second partitioning)", "None", options->repartitioning, options->repartitioning, sizeof(options->repartitioning), NULL));
38: } else {
39: options->repartitioning[0] = '\0';
40: }
41: PetscCall(PetscOptionsBool("-tpweight", "Use target partition weights", FILENAME, options->tpw, &options->tpw, NULL));
42: PetscOptionsEnd();
43: PetscFunctionReturn(PETSC_SUCCESS);
44: }
46: static PetscErrorCode ScotchResetRandomSeed()
47: {
48: PetscFunctionBegin;
49: #if PetscDefined(HAVE_PTSCOTCH)
50: SCOTCH_randomReset();
51: #endif
52: PetscFunctionReturn(PETSC_SUCCESS);
53: }
55: static PetscErrorCode CreateMesh(MPI_Comm comm, AppCtx *user, DM *dm)
56: {
57: PetscFunctionBegin;
58: PetscCall(DMCreate(comm, dm));
59: PetscCall(DMSetType(*dm, DMPLEX));
60: PetscCall(DMPlexDistributeSetDefault(*dm, PETSC_FALSE));
61: PetscCall(DMSetFromOptions(*dm));
62: PetscCall(DMViewFromOptions(*dm, NULL, "-dm_view"));
63: PetscFunctionReturn(PETSC_SUCCESS);
64: }
66: int main(int argc, char **argv)
67: {
68: MPI_Comm comm;
69: DM dm1, dm2, dmdist1, dmdist2;
70: DMPlexInterpolatedFlag interp;
71: MatPartitioning mp;
72: PetscPartitioner part1, part2;
73: AppCtx user;
74: IS is1 = NULL, is2 = NULL;
75: IS is1g, is2g;
76: PetscSection s1 = NULL, s2 = NULL, tpws = NULL;
77: PetscBool flg;
78: PetscMPIInt size;
80: PetscFunctionBeginUser;
81: PetscCall(PetscInitialize(&argc, &argv, NULL, help));
82: comm = PETSC_COMM_WORLD;
83: PetscCallMPI(MPI_Comm_size(comm, &size));
84: PetscCall(ProcessOptions(comm, &user));
85: PetscCall(CreateMesh(comm, &user, &dm1));
86: PetscCall(CreateMesh(comm, &user, &dm2));
88: if (user.tpw) {
89: PetscBool isscotch;
91: PetscCall(PetscSectionCreate(comm, &tpws));
92: PetscCall(PetscSectionSetChart(tpws, 0, size));
93: for (PetscInt i = 0; i < size; i++) {
94: PetscInt tdof = i % 2 ? 2 * i - 1 : i + 2;
95: PetscCall(PetscSectionSetDof(tpws, i, tdof));
96: }
97: // PTScotch cannot have a zero partition weight
98: PetscCall(PetscStrncmp(user.partitioning, PETSCPARTITIONERPTSCOTCH, sizeof(PETSCPARTITIONERPTSCOTCH), &isscotch));
99: if (!isscotch && size > 1) { /* test zero tpw entry */
100: PetscCall(PetscSectionSetDof(tpws, 0, 0));
101: }
102: PetscCall(PetscSectionSetUp(tpws));
103: }
105: /* partition dm1 using PETSCPARTITIONERPARMETIS */
106: PetscCall(ScotchResetRandomSeed());
107: PetscCall(DMPlexGetPartitioner(dm1, &part1));
108: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)part1, "p1_"));
109: PetscCall(PetscPartitionerSetType(part1, user.partitioning));
110: PetscCall(PetscPartitionerSetFromOptions(part1));
111: PetscCall(PetscSectionCreate(comm, &s1));
112: PetscCall(PetscPartitionerDMPlexPartition(part1, dm1, tpws, s1, &is1));
114: /* partition dm2 using PETSCPARTITIONERMATPARTITIONING with MATPARTITIONINGPARMETIS */
115: PetscCall(ScotchResetRandomSeed());
116: PetscCall(DMPlexGetPartitioner(dm2, &part2));
117: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)part2, "p2_"));
118: PetscCall(PetscPartitionerSetType(part2, PETSCPARTITIONERMATPARTITIONING));
119: PetscCall(PetscPartitionerMatPartitioningGetMatPartitioning(part2, &mp));
120: PetscCall(MatPartitioningSetType(mp, user.partitioning));
121: PetscCall(PetscPartitionerSetFromOptions(part2));
122: PetscCall(PetscSectionCreate(comm, &s2));
123: PetscCall(PetscPartitionerDMPlexPartition(part2, dm2, tpws, s2, &is2));
125: PetscCall(ISOnComm(is1, comm, PETSC_USE_POINTER, &is1g));
126: PetscCall(ISOnComm(is2, comm, PETSC_USE_POINTER, &is2g));
127: PetscCall(ISViewFromOptions(is1g, NULL, "-seq_is1_view"));
128: PetscCall(ISViewFromOptions(is2g, NULL, "-seq_is2_view"));
129: /* compare the two ISs */
130: if (user.compare_is) {
131: PetscCall(ISEqualUnsorted(is1g, is2g, &flg));
132: if (!flg) PetscCall(PetscPrintf(comm, "ISs are not equal with type %s with size %d.\n", user.partitioning, size));
133: }
134: PetscCall(ISDestroy(&is1g));
135: PetscCall(ISDestroy(&is2g));
137: /* compare the two PetscSections */
138: PetscCall(PetscSectionViewFromOptions(s1, NULL, "-seq_s1_view"));
139: PetscCall(PetscSectionViewFromOptions(s2, NULL, "-seq_s2_view"));
140: if (user.compare_is) {
141: PetscCall(PetscSectionCompare(s1, s2, &flg));
142: if (!flg) PetscCall(PetscPrintf(comm, "PetscSections are not equal with %s with size %d.\n", user.partitioning, size));
143: }
145: /* distribute both DMs */
146: PetscCall(ScotchResetRandomSeed());
147: PetscCall(DMPlexDistribute(dm1, 0, NULL, &dmdist1));
148: PetscCall(ScotchResetRandomSeed());
149: PetscCall(DMPlexDistribute(dm2, 0, NULL, &dmdist2));
151: /* cleanup */
152: PetscCall(PetscSectionDestroy(&tpws));
153: PetscCall(PetscSectionDestroy(&s1));
154: PetscCall(PetscSectionDestroy(&s2));
155: PetscCall(ISDestroy(&is1));
156: PetscCall(ISDestroy(&is2));
157: PetscCall(DMDestroy(&dm1));
158: PetscCall(DMDestroy(&dm2));
160: /* if distributed DMs are NULL (sequential case), then quit */
161: if (!dmdist1 && !dmdist2) return 0;
163: PetscCall(DMViewFromOptions(dmdist1, NULL, "-dm_dist1_view"));
164: PetscCall(DMViewFromOptions(dmdist2, NULL, "-dm_dist2_view"));
166: /* compare the two distributed DMs */
167: if (user.compare_dm) {
168: PetscCall(DMPlexEqual(dmdist1, dmdist2, &flg));
169: if (!flg) PetscCall(PetscPrintf(comm, "Distributed DMs are not equal %s with size %d.\n", user.partitioning, size));
170: }
172: /* if repartitioning is disabled, then quit */
173: if (user.repartitioning[0] == '\0') return 0;
175: if (user.tpw) {
176: PetscCall(PetscSectionCreate(comm, &tpws));
177: PetscCall(PetscSectionSetChart(tpws, 0, size));
178: for (PetscInt i = 0; i < size; i++) {
179: PetscInt tdof = i % 2 ? i + 1 : size - i;
180: PetscCall(PetscSectionSetDof(tpws, i, tdof));
181: }
182: PetscCall(PetscSectionSetUp(tpws));
183: }
185: /* repartition distributed DM dmdist1 */
186: PetscCall(ScotchResetRandomSeed());
187: PetscCall(DMPlexGetPartitioner(dmdist1, &part1));
188: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)part1, "dp1_"));
189: PetscCall(PetscPartitionerSetType(part1, user.repartitioning));
190: PetscCall(PetscPartitionerSetFromOptions(part1));
191: PetscCall(PetscSectionCreate(comm, &s1));
192: PetscCall(PetscPartitionerDMPlexPartition(part1, dmdist1, tpws, s1, &is1));
194: /* repartition distributed DM dmdist2 */
195: PetscCall(ScotchResetRandomSeed());
196: PetscCall(DMPlexGetPartitioner(dmdist2, &part2));
197: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)part2, "dp2_"));
198: PetscCall(PetscPartitionerSetType(part2, PETSCPARTITIONERMATPARTITIONING));
199: PetscCall(PetscPartitionerMatPartitioningGetMatPartitioning(part2, &mp));
200: PetscCall(MatPartitioningSetType(mp, user.repartitioning));
201: PetscCall(PetscPartitionerSetFromOptions(part2));
202: PetscCall(PetscSectionCreate(comm, &s2));
203: PetscCall(PetscPartitionerDMPlexPartition(part2, dmdist2, tpws, s2, &is2));
205: /* compare the two ISs */
206: PetscCall(ISOnComm(is1, comm, PETSC_USE_POINTER, &is1g));
207: PetscCall(ISOnComm(is2, comm, PETSC_USE_POINTER, &is2g));
208: PetscCall(ISViewFromOptions(is1g, NULL, "-dist_is1_view"));
209: PetscCall(ISViewFromOptions(is2g, NULL, "-dist_is2_view"));
210: if (user.compare_is) {
211: PetscCall(ISEqualUnsorted(is1g, is2g, &flg));
212: if (!flg) PetscCall(PetscPrintf(comm, "Distributed ISs are not equal, with %s with size %d.\n", user.repartitioning, size));
213: }
214: PetscCall(ISDestroy(&is1g));
215: PetscCall(ISDestroy(&is2g));
217: /* compare the two PetscSections */
218: PetscCall(PetscSectionViewFromOptions(s1, NULL, "-dist_s1_view"));
219: PetscCall(PetscSectionViewFromOptions(s2, NULL, "-dist_s2_view"));
220: if (user.compare_is) {
221: PetscCall(PetscSectionCompare(s1, s2, &flg));
222: if (!flg) PetscCall(PetscPrintf(comm, "Distributed PetscSections are not equal, with %s with size %d.\n", user.repartitioning, size));
223: }
225: /* redistribute both distributed DMs */
226: PetscCall(ScotchResetRandomSeed());
227: PetscCall(DMPlexDistribute(dmdist1, 0, NULL, &dm1));
228: PetscCall(ScotchResetRandomSeed());
229: PetscCall(DMPlexDistribute(dmdist2, 0, NULL, &dm2));
231: /* compare the two distributed DMs */
232: PetscCall(DMPlexIsInterpolated(dm1, &interp));
233: if (interp == DMPLEX_INTERPOLATED_NONE) {
234: PetscCall(DMPlexEqual(dm1, dm2, &flg));
235: if (!flg) PetscCall(PetscPrintf(comm, "Redistributed DMs are not equal, with %s with size %d.\n", user.repartitioning, size));
236: }
238: /* cleanup */
239: PetscCall(PetscSectionDestroy(&tpws));
240: PetscCall(PetscSectionDestroy(&s1));
241: PetscCall(PetscSectionDestroy(&s2));
242: PetscCall(ISDestroy(&is1));
243: PetscCall(ISDestroy(&is2));
244: PetscCall(DMDestroy(&dm1));
245: PetscCall(DMDestroy(&dm2));
246: PetscCall(DMDestroy(&dmdist1));
247: PetscCall(DMDestroy(&dmdist2));
248: PetscCall(PetscFinalize());
249: return 0;
250: }
252: /*TEST
254: test:
255: # partition sequential mesh loaded from Exodus file
256: suffix: 0
257: nsize: {{1 2 3 4 8}}
258: requires: chaco parmetis ptscotch exodusii
259: args: -dm_plex_filename ${PETSC_DIR}/share/petsc/datafiles/meshes/blockcylinder-50.exo
260: args: -partitioning {{chaco parmetis ptscotch}} -repartitioning {{parmetis ptscotch}} -tpweight {{0 1}}
261: output_file: output/empty.out
262: test:
263: # partition mesh generated by ctetgen using scotch, then repartition with scotch, diff view
264: suffix: 3
265: nsize: 4
266: requires: ptscotch ctetgen
267: args: -dm_plex_dim 3 -dm_plex_box_faces 2,3,2 -partitioning ptscotch -repartitioning ptscotch
268: args: -p1_petscpartitioner_view -p2_petscpartitioner_view -dp1_petscpartitioner_view -dp2_petscpartitioner_view -tpweight {{0 1}}
269: test:
270: # partition mesh generated by ctetgen using partitioners supported both by MatPartitioning and PetscPartitioner
271: suffix: 4
272: nsize: {{1 2 3 4 8}}
273: requires: chaco parmetis ptscotch ctetgen
274: args: -dm_plex_dim 3 -dm_plex_box_faces {{2,3,4 5,4,3 7,11,5}} -partitioning {{chaco parmetis ptscotch}} -repartitioning {{parmetis ptscotch}} -tpweight {{0 1}}
275: output_file: output/empty.out
277: TEST*/