Actual source code: ex4.c
1: static char help[] = "Test PetscSFFCompose when the ilocal array is not the identity\n\n";
3: #include <petscsf.h>
5: int main(int argc, char **argv)
6: {
7: PetscSF sfA, sfB, sfBA;
8: PetscInt nrootsA, nleavesA, nrootsB, nleavesB;
9: PetscInt *ilocalA, *ilocalB;
10: PetscSFNode *iremoteA, *iremoteB;
11: Vec a, b, ba;
12: const PetscScalar *arrayR;
13: PetscScalar *arrayW;
14: PetscMPIInt size;
15: PetscInt i;
16: PetscInt maxleafB;
17: PetscBool flag = PETSC_FALSE;
20: PetscInitialize(&argc, &argv, NULL, help);
21: MPI_Comm_size(PETSC_COMM_WORLD, &size);
24: PetscSFCreate(PETSC_COMM_WORLD, &sfA);
25: PetscSFCreate(PETSC_COMM_WORLD, &sfB);
26: PetscSFSetFromOptions(sfA);
27: PetscSFSetFromOptions(sfB);
29: PetscOptionsGetBool(NULL, NULL, "-sparse_sfB", &flag, NULL);
31: if (flag) {
32: /* sfA permutes indices, sfB has sparse leaf space. */
33: nrootsA = 3;
34: nleavesA = 3;
35: nrootsB = 3;
36: nleavesB = 2;
37: } else {
38: /* sfA reverses indices, sfB is identity */
39: nrootsA = nrootsB = nleavesA = nleavesB = 4;
40: }
41: PetscMalloc1(nleavesA, &ilocalA);
42: PetscMalloc1(nleavesA, &iremoteA);
43: PetscMalloc1(nleavesB, &ilocalB);
44: PetscMalloc1(nleavesB, &iremoteB);
46: for (i = 0; i < nleavesA; i++) {
47: iremoteA[i].rank = 0;
48: iremoteA[i].index = i;
49: if (flag) {
50: ilocalA[i] = (i + 1) % nleavesA;
51: } else {
52: ilocalA[i] = nleavesA - i - 1;
53: }
54: }
56: for (i = 0; i < nleavesB; i++) {
57: iremoteB[i].rank = 0;
58: if (flag) {
59: ilocalB[i] = nleavesB - i;
60: iremoteB[i].index = nleavesB - i - 1;
61: } else {
62: ilocalB[i] = i;
63: iremoteB[i].index = i;
64: }
65: }
67: PetscSFSetGraph(sfA, nrootsA, nleavesA, ilocalA, PETSC_OWN_POINTER, iremoteA, PETSC_OWN_POINTER);
68: PetscSFSetGraph(sfB, nrootsB, nleavesB, ilocalB, PETSC_OWN_POINTER, iremoteB, PETSC_OWN_POINTER);
69: PetscSFSetUp(sfA);
70: PetscSFSetUp(sfB);
71: PetscObjectSetName((PetscObject)sfA, "sfA");
72: PetscObjectSetName((PetscObject)sfB, "sfB");
74: VecCreateSeq(PETSC_COMM_WORLD, nrootsA, &a);
75: VecCreateSeq(PETSC_COMM_WORLD, nleavesA, &b);
76: PetscSFGetLeafRange(sfB, NULL, &maxleafB);
77: VecCreateSeq(PETSC_COMM_WORLD, maxleafB + 1, &ba);
78: VecGetArray(a, &arrayW);
79: for (i = 0; i < nrootsA; i++) arrayW[i] = (PetscScalar)i;
80: VecRestoreArray(a, &arrayW);
82: PetscPrintf(PETSC_COMM_WORLD, "Initial Vec A\n");
83: VecView(a, NULL);
84: VecGetArrayRead(a, &arrayR);
85: VecGetArray(b, &arrayW);
87: PetscSFBcastBegin(sfA, MPIU_SCALAR, arrayR, arrayW, MPI_REPLACE);
88: PetscSFBcastEnd(sfA, MPIU_SCALAR, arrayR, arrayW, MPI_REPLACE);
89: VecRestoreArray(b, &arrayW);
90: VecRestoreArrayRead(a, &arrayR);
91: PetscPrintf(PETSC_COMM_WORLD, "\nBroadcast A->B over sfA\n");
92: VecView(b, NULL);
94: VecGetArrayRead(b, &arrayR);
95: VecGetArray(ba, &arrayW);
96: arrayW[0] = 10.0; /* Not touched by bcast */
97: PetscSFBcastBegin(sfB, MPIU_SCALAR, arrayR, arrayW, MPI_REPLACE);
98: PetscSFBcastEnd(sfB, MPIU_SCALAR, arrayR, arrayW, MPI_REPLACE);
99: VecRestoreArrayRead(b, &arrayR);
100: VecRestoreArray(ba, &arrayW);
102: PetscPrintf(PETSC_COMM_WORLD, "\nBroadcast B->BA over sfB\n");
103: VecView(ba, NULL);
105: PetscSFCompose(sfA, sfB, &sfBA);
106: PetscSFSetFromOptions(sfBA);
107: PetscObjectSetName((PetscObject)sfBA, "(sfB o sfA)");
108: VecGetArrayRead(a, &arrayR);
109: VecGetArray(ba, &arrayW);
110: arrayW[0] = 11.0; /* Not touched by bcast */
111: PetscSFBcastBegin(sfBA, MPIU_SCALAR, arrayR, arrayW, MPI_REPLACE);
112: PetscSFBcastEnd(sfBA, MPIU_SCALAR, arrayR, arrayW, MPI_REPLACE);
113: VecRestoreArray(ba, &arrayW);
114: VecRestoreArrayRead(a, &arrayR);
115: PetscPrintf(PETSC_COMM_WORLD, "\nBroadcast A->BA over sfBA (sfB o sfA)\n");
116: VecView(ba, NULL);
118: VecDestroy(&ba);
119: VecDestroy(&b);
120: VecDestroy(&a);
122: PetscSFView(sfA, NULL);
123: PetscSFView(sfB, NULL);
124: PetscSFView(sfBA, NULL);
125: PetscSFDestroy(&sfA);
126: PetscSFDestroy(&sfB);
127: PetscSFDestroy(&sfBA);
129: PetscFinalize();
130: return 0;
131: }
133: /*TEST
135: test:
136: suffix: 1
138: test:
139: suffix: 2
140: filter: grep -v "type" | grep -v "sort"
141: args: -sparse_sfB
143: test:
144: suffix: 2_window
145: filter: grep -v "type" | grep -v "sort"
146: output_file: output/ex4_2.out
147: args: -sparse_sfB -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create dynamic allocate}}
148: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
150: # The nightly test suite with MPICH uses ch3:sock, which is broken when winsize == 0 in some of the processes
151: test:
152: suffix: 2_window_shared
153: filter: grep -v "type" | grep -v "sort"
154: output_file: output/ex4_2.out
155: args: -sparse_sfB -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor shared
156: requires: defined(PETSC_HAVE_MPI_PROCESS_SHARED_MEMORY) !defined(PETSC_HAVE_MPICH_NUMVERSION) defined(PETSC_HAVE_MPI_ONE_SIDED)
158: TEST*/