Actual source code: ex33.c
1: static char help[] = "Tests PetscPartitioner.\n\n";
3: #include <petscpartitioner.h>
5: int main(int argc, char **argv)
6: {
7: PetscPartitioner p;
8: PetscSection partSection, vertexSection = NULL, targetSection = NULL;
9: IS partition, is;
10: PetscMPIInt size, rank;
11: PetscInt nparts, i;
12: PetscInt nv = 4;
13: PetscInt vv[5] = {0, 2, 4, 6, 8};
14: PetscInt vadj[8] = {3, 1, 0, 2, 1, 3, 2, 0};
15: PetscBool sequential;
16: PetscBool vwgts = PETSC_FALSE;
17: PetscBool pwgts = PETSC_FALSE;
19: PetscFunctionBeginUser;
20: PetscCall(PetscInitialize(&argc, &argv, NULL, help));
21: PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
22: PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
23: nparts = size;
24: PetscCall(PetscOptionsGetInt(NULL, NULL, "-nparts", &nparts, NULL));
25: PetscCall(PetscOptionsGetBool(NULL, NULL, "-vwgts", &vwgts, NULL));
26: PetscCall(PetscOptionsGetBool(NULL, NULL, "-pwgts", &pwgts, NULL));
28: /* create PetscPartitioner */
29: PetscCall(PetscPartitionerCreate(PETSC_COMM_WORLD, &p));
30: PetscCall(PetscPartitionerSetType(p, PETSCPARTITIONERSIMPLE));
31: PetscCall(PetscPartitionerSetFromOptions(p));
33: /* create partition section */
34: PetscCall(PetscSectionCreate(PETSC_COMM_WORLD, &partSection));
36: if (vwgts) { /* create vertex weights section */
37: PetscCall(PetscSectionCreate(PETSC_COMM_WORLD, &vertexSection));
38: PetscCall(PetscSectionSetChart(vertexSection, 0, nv));
39: for (i = 0; i < nv; i++) PetscCall(PetscSectionSetDof(vertexSection, i, 1));
40: PetscCall(PetscSectionSetUp(vertexSection));
41: }
43: if (pwgts) { /* create partition weights section */
44: PetscCall(PetscSectionCreate(PETSC_COMM_WORLD, &targetSection));
45: PetscCall(PetscSectionSetChart(targetSection, 0, nparts));
46: for (i = 0; i < nparts; i++) PetscCall(PetscSectionSetDof(targetSection, i, 1));
47: PetscCall(PetscSectionSetUp(targetSection));
48: }
50: #if defined(PETSC_USE_LOG)
51: { /* Test logging */
52: PetscLogEvent event;
54: PetscCall(PetscLogEventRegister("MyPartitionerEvent", PETSCPARTITIONER_CLASSID, &event));
55: { /* PetscLogEventExcludeClass is broken, new events are not deactivated */
56: char logList[256];
57: PetscBool opt, pkg;
59: PetscCall(PetscOptionsGetString(NULL, NULL, "-log_exclude", logList, sizeof(logList), &opt));
60: if (opt) {
61: PetscCall(PetscStrInList("partitioner", logList, ',', &pkg));
62: if (pkg) PetscCall(PetscLogEventExcludeClass(PETSCPARTITIONER_CLASSID));
63: }
64: }
65: PetscCall(PetscLogEventBegin(event, p, NULL, NULL, NULL));
66: PetscCall(PetscLogEventEnd(event, p, NULL, NULL, NULL));
67: }
68: #endif
70: /* test setup and reset */
71: PetscCall(PetscPartitionerSetUp(p));
72: PetscCall(PetscPartitionerReset(p));
74: /* test partitioning an empty graph */
75: PetscCall(PetscPartitionerPartition(p, nparts, 0, NULL, NULL, vertexSection, targetSection, partSection, &partition));
76: PetscCall(PetscObjectSetName((PetscObject)partSection, "NULL SECTION"));
77: PetscCall(PetscSectionView(partSection, NULL));
78: PetscCall(ISOnComm(partition, PETSC_COMM_WORLD, PETSC_USE_POINTER, &is));
79: PetscCall(PetscObjectSetName((PetscObject)is, "NULL PARTITION"));
80: PetscCall(ISView(is, NULL));
81: PetscCall(ISDestroy(&is));
82: PetscCall(ISDestroy(&partition));
84: /* test view from options */
85: PetscCall(PetscPartitionerViewFromOptions(p, NULL, "-part_view"));
87: /* test partitioning a graph on one process only (not main) */
88: if (rank == size - 1) {
89: PetscCall(PetscPartitionerPartition(p, nparts, nv, vv, vadj, vertexSection, targetSection, partSection, &partition));
90: } else {
91: PetscCall(PetscPartitionerPartition(p, nparts, 0, NULL, NULL, vertexSection, targetSection, partSection, &partition));
92: }
93: PetscCall(PetscObjectSetName((PetscObject)partSection, "SEQ SECTION"));
94: PetscCall(PetscSectionView(partSection, NULL));
95: PetscCall(ISOnComm(partition, PETSC_COMM_WORLD, PETSC_USE_POINTER, &is));
96: PetscCall(PetscObjectSetName((PetscObject)is, "SEQ PARTITION"));
97: PetscCall(ISView(is, NULL));
98: PetscCall(ISDestroy(&is));
99: PetscCall(ISDestroy(&partition));
101: PetscCall(PetscObjectTypeCompareAny((PetscObject)p, &sequential, PETSCPARTITIONERCHACO, NULL));
102: if (sequential) goto finally;
104: /* test partitioning a graph on a subset of the processes only */
105: if (rank % 2) {
106: PetscCall(PetscPartitionerPartition(p, nparts, 0, NULL, NULL, NULL, targetSection, partSection, &partition));
107: } else {
108: PetscInt i, totv = nv * ((size + 1) / 2), *pvadj;
110: PetscCall(PetscMalloc1(2 * nv, &pvadj));
111: for (i = 0; i < nv; i++) {
112: pvadj[2 * i] = (nv * (rank / 2) + totv + i - 1) % totv;
113: pvadj[2 * i + 1] = (nv * (rank / 2) + totv + i + 1) % totv;
114: }
115: PetscCall(PetscPartitionerPartition(p, nparts, nv, vv, pvadj, NULL, targetSection, partSection, &partition));
116: PetscCall(PetscFree(pvadj));
117: }
118: PetscCall(PetscObjectSetName((PetscObject)partSection, "PARVOID SECTION"));
119: PetscCall(PetscSectionView(partSection, NULL));
120: PetscCall(ISOnComm(partition, PETSC_COMM_WORLD, PETSC_USE_POINTER, &is));
121: PetscCall(PetscObjectSetName((PetscObject)is, "PARVOID PARTITION"));
122: PetscCall(ISView(is, NULL));
123: PetscCall(ISDestroy(&is));
124: PetscCall(ISDestroy(&partition));
126: finally:
127: PetscCall(PetscSectionDestroy(&partSection));
128: PetscCall(PetscSectionDestroy(&vertexSection));
129: PetscCall(PetscSectionDestroy(&targetSection));
130: PetscCall(PetscPartitionerDestroy(&p));
131: PetscCall(PetscFinalize());
132: return 0;
133: }
135: /*TEST
137: test:
138: suffix: default
140: testset:
141: requires: defined(PETSC_USE_LOG)
142: args: -petscpartitioner_type simple -log_summary
143: filter: grep MyPartitionerEvent | cut -d " " -f 1
144: test:
145: suffix: log_include
146: test:
147: suffix: log_exclude
148: args: -log_exclude partitioner
150: test:
151: suffix: simple
152: nsize: {{1 2 3}separate output}
153: args: -nparts {{1 2 3}separate output} -pwgts {{false true}separate output} -petscpartitioner_type simple -petscpartitioner_view
155: test:
156: suffix: shell
157: nsize: {{1 2 3}separate output}
158: args: -nparts {{1 2 3}separate output} -petscpartitioner_type shell -petscpartitioner_shell_random -petscpartitioner_view
160: test:
161: suffix: gather
162: nsize: {{1 2 3}separate output}
163: args: -nparts {{1 2 3}separate output} -petscpartitioner_type gather -petscpartitioner_view -petscpartitioner_view_graph
165: test:
166: requires: parmetis
167: suffix: parmetis
168: nsize: {{1 2 3}separate output}
169: args: -nparts {{1 2 3}separate output} -pwgts {{false true}} -vwgts {{false true}}
170: args: -petscpartitioner_type parmetis -petscpartitioner_view -petscpartitioner_view_graph
172: test:
173: requires: parmetis
174: suffix: parmetis_type
175: nsize: {{1 2}}
176: args: -petscpartitioner_type parmetis -part_view
177: args: -petscpartitioner_parmetis_type {{kway rb}separate output}
178: filter: grep "ParMetis type"
180: test:
181: requires: ptscotch
182: suffix: ptscotch
183: nsize: {{1 2 3}separate output}
184: args: -nparts {{1 2 3}separate output} -pwgts {{false true}separate output} -vwgts {{false true}}
185: args: -petscpartitioner_type ptscotch -petscpartitioner_view -petscpartitioner_view_graph
187: test:
188: requires: ptscotch
189: suffix: ptscotch_strategy
190: nsize: {{1 2}}
191: args: -petscpartitioner_type ptscotch -part_view
192: args: -petscpartitioner_ptscotch_strategy {{DEFAULT QUALITY SPEED BALANCE SAFETY SCALABILITY RECURSIVE REMAP}separate output}
193: filter: grep "partitioning strategy"
195: test:
196: requires: chaco
197: suffix: chaco
198: nsize: {{1 2 3}separate output}
199: args: -nparts {{1}separate output} -petscpartitioner_type chaco -petscpartitioner_view -petscpartitioner_view_graph
201: test:
202: TODO: non reproducible (uses C stdlib rand())
203: requires: chaco
204: suffix: chaco
205: nsize: {{1 2 3}separate output}
206: args: -nparts {{2 3}separate output} -petscpartitioner_type chaco -petscpartitioner_view -petscpartitioner_view_graph
208: TEST*/