Actual source code: ex1.c
1: static const char help[] = "Test star forest communication (PetscSF)\n\n";
3: /*
4: Description: A star is a simple tree with one root and zero or more leaves.
5: A star forest is a union of disjoint stars.
6: Many common communication patterns can be expressed as updates of rootdata using leafdata and vice-versa.
7: This example creates a star forest, communicates values using the graph (see options for types of communication), views the graph, then destroys it.
8: */
10: /*
11: Include petscsf.h so we can use PetscSF objects. Note that this automatically
12: includes petscsys.h.
13: */
14: #include <petscsf.h>
15: #include <petscviewer.h>
17: /* like PetscSFView() but with alternative array of local indices */
18: static PetscErrorCode PetscSFViewCustomLocals_Private(PetscSF sf, const PetscInt locals[], PetscViewer viewer)
19: {
20: const PetscSFNode *iremote;
21: PetscInt i, nroots, nleaves, nranks;
22: PetscMPIInt rank;
24: PetscFunctionBeginUser;
25: PetscCallMPI(MPI_Comm_rank(PetscObjectComm((PetscObject)sf), &rank));
26: PetscCall(PetscSFGetGraph(sf, &nroots, &nleaves, NULL, &iremote));
27: PetscCall(PetscSFGetRootRanks(sf, &nranks, NULL, NULL, NULL, NULL));
28: PetscCall(PetscViewerASCIIPushTab(viewer));
29: PetscCall(PetscViewerASCIIPushSynchronized(viewer));
30: PetscCall(PetscViewerASCIISynchronizedPrintf(viewer, "[%d] Number of roots=%" PetscInt_FMT ", leaves=%" PetscInt_FMT ", remote ranks=%" PetscInt_FMT "\n", rank, nroots, nleaves, nranks));
31: for (i = 0; i < nleaves; i++) PetscCall(PetscViewerASCIISynchronizedPrintf(viewer, "[%d] %" PetscInt_FMT " <- (%" PetscInt_FMT ",%" PetscInt_FMT ")\n", rank, locals[i], iremote[i].rank, iremote[i].index));
32: PetscCall(PetscViewerFlush(viewer));
33: PetscCall(PetscViewerASCIIPopTab(viewer));
34: PetscCall(PetscViewerASCIIPopSynchronized(viewer));
35: PetscFunctionReturn(PETSC_SUCCESS);
36: }
38: int main(int argc, char **argv)
39: {
40: PetscInt i, nroots, nrootsalloc, nleaves, nleavesalloc, *mine, stride;
41: PetscSFNode *remote;
42: PetscMPIInt rank, size;
43: PetscSF sf;
44: PetscBool test_all, test_bcast, test_bcastop, test_reduce, test_degree, test_fetchandop, test_gather, test_scatter, test_embed, test_invert, test_sf_distribute, test_char;
45: MPI_Op mop = MPI_OP_NULL; /* initialize to prevent compiler warnings with cxx_quad build */
46: char opstring[256];
47: PetscBool strflg;
49: PetscFunctionBeginUser;
50: PetscCall(PetscInitialize(&argc, &argv, (char *)0, help));
51: PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
52: PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
54: PetscOptionsBegin(PETSC_COMM_WORLD, "", "PetscSF Test Options", "none");
55: test_all = PETSC_FALSE;
56: PetscCall(PetscOptionsBool("-test_all", "Test all SF communications", "", test_all, &test_all, NULL));
57: test_bcast = test_all;
58: PetscCall(PetscOptionsBool("-test_bcast", "Test broadcast", "", test_bcast, &test_bcast, NULL));
59: test_bcastop = test_all;
60: PetscCall(PetscOptionsBool("-test_bcastop", "Test broadcast and reduce", "", test_bcastop, &test_bcastop, NULL));
61: test_reduce = test_all;
62: PetscCall(PetscOptionsBool("-test_reduce", "Test reduction", "", test_reduce, &test_reduce, NULL));
63: test_char = test_all;
64: PetscCall(PetscOptionsBool("-test_char", "Test signed char, unsigned char, and char", "", test_char, &test_char, NULL));
65: mop = MPI_SUM;
66: PetscCall(PetscStrncpy(opstring, "sum", sizeof(opstring)));
67: PetscCall(PetscOptionsString("-test_op", "Designate which MPI_Op to use", "", opstring, opstring, sizeof(opstring), NULL));
68: PetscCall(PetscStrcmp("sum", opstring, &strflg));
69: if (strflg) mop = MPIU_SUM;
70: PetscCall(PetscStrcmp("prod", opstring, &strflg));
71: if (strflg) mop = MPI_PROD;
72: PetscCall(PetscStrcmp("max", opstring, &strflg));
73: if (strflg) mop = MPI_MAX;
74: PetscCall(PetscStrcmp("min", opstring, &strflg));
75: if (strflg) mop = MPI_MIN;
76: PetscCall(PetscStrcmp("land", opstring, &strflg));
77: if (strflg) mop = MPI_LAND;
78: PetscCall(PetscStrcmp("band", opstring, &strflg));
79: if (strflg) mop = MPI_BAND;
80: PetscCall(PetscStrcmp("lor", opstring, &strflg));
81: if (strflg) mop = MPI_LOR;
82: PetscCall(PetscStrcmp("bor", opstring, &strflg));
83: if (strflg) mop = MPI_BOR;
84: PetscCall(PetscStrcmp("lxor", opstring, &strflg));
85: if (strflg) mop = MPI_LXOR;
86: PetscCall(PetscStrcmp("bxor", opstring, &strflg));
87: if (strflg) mop = MPI_BXOR;
88: test_degree = test_all;
89: PetscCall(PetscOptionsBool("-test_degree", "Test computation of vertex degree", "", test_degree, &test_degree, NULL));
90: test_fetchandop = test_all;
91: PetscCall(PetscOptionsBool("-test_fetchandop", "Test atomic Fetch-And-Op", "", test_fetchandop, &test_fetchandop, NULL));
92: test_gather = test_all;
93: PetscCall(PetscOptionsBool("-test_gather", "Test point gather", "", test_gather, &test_gather, NULL));
94: test_scatter = test_all;
95: PetscCall(PetscOptionsBool("-test_scatter", "Test point scatter", "", test_scatter, &test_scatter, NULL));
96: test_embed = test_all;
97: PetscCall(PetscOptionsBool("-test_embed", "Test point embed", "", test_embed, &test_embed, NULL));
98: test_invert = test_all;
99: PetscCall(PetscOptionsBool("-test_invert", "Test point invert", "", test_invert, &test_invert, NULL));
100: stride = 1;
101: PetscCall(PetscOptionsInt("-stride", "Stride for leaf and root data", "", stride, &stride, NULL));
102: test_sf_distribute = PETSC_FALSE;
103: PetscCall(PetscOptionsBool("-test_sf_distribute", "Create an SF that 'distributes' to each process, like an alltoall", "", test_sf_distribute, &test_sf_distribute, NULL));
104: PetscCall(PetscOptionsString("-test_op", "Designate which MPI_Op to use", "", opstring, opstring, sizeof(opstring), NULL));
105: PetscOptionsEnd();
107: if (test_sf_distribute) {
108: nroots = size;
109: nrootsalloc = size;
110: nleaves = size;
111: nleavesalloc = size;
112: mine = NULL;
113: PetscCall(PetscMalloc1(nleaves, &remote));
114: for (i = 0; i < size; i++) {
115: remote[i].rank = i;
116: remote[i].index = rank;
117: }
118: } else {
119: nroots = 2 + (PetscInt)(rank == 0);
120: nrootsalloc = nroots * stride;
121: nleaves = 2 + (PetscInt)(rank > 0);
122: nleavesalloc = nleaves * stride;
123: mine = NULL;
124: if (stride > 1) {
125: PetscInt i;
127: PetscCall(PetscMalloc1(nleaves, &mine));
128: for (i = 0; i < nleaves; i++) mine[i] = stride * i;
129: }
130: PetscCall(PetscMalloc1(nleaves, &remote));
131: /* Left periodic neighbor */
132: remote[0].rank = (rank + size - 1) % size;
133: remote[0].index = 1 * stride;
134: /* Right periodic neighbor */
135: remote[1].rank = (rank + 1) % size;
136: remote[1].index = 0 * stride;
137: if (rank > 0) { /* All processes reference rank 0, index 1 */
138: remote[2].rank = 0;
139: remote[2].index = 2 * stride;
140: }
141: }
143: /* Create a star forest for communication. In this example, the leaf space is dense, so we pass NULL. */
144: PetscCall(PetscSFCreate(PETSC_COMM_WORLD, &sf));
145: PetscCall(PetscSFSetFromOptions(sf));
146: PetscCall(PetscSFSetGraph(sf, nrootsalloc, nleaves, mine, PETSC_OWN_POINTER, remote, PETSC_OWN_POINTER));
147: PetscCall(PetscSFSetUp(sf));
149: /* View graph, mostly useful for debugging purposes. */
150: PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_INFO_DETAIL));
151: PetscCall(PetscSFView(sf, PETSC_VIEWER_STDOUT_WORLD));
152: PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD));
154: if (test_bcast) { /* broadcast rootdata into leafdata */
155: PetscInt *rootdata, *leafdata;
156: /* Allocate space for send and receive buffers. This example communicates PetscInt, but other types, including
157: * user-defined structures, could also be used. */
158: PetscCall(PetscMalloc2(nrootsalloc, &rootdata, nleavesalloc, &leafdata));
159: /* Set rootdata buffer to be broadcast */
160: for (i = 0; i < nrootsalloc; i++) rootdata[i] = -1;
161: for (i = 0; i < nroots; i++) rootdata[i * stride] = 100 * (rank + 1) + i;
162: /* Initialize local buffer, these values are never used. */
163: for (i = 0; i < nleavesalloc; i++) leafdata[i] = -1;
164: /* Broadcast entries from rootdata to leafdata. Computation or other communication can be performed between the begin and end calls. */
165: PetscCall(PetscSFBcastBegin(sf, MPIU_INT, rootdata, leafdata, MPI_REPLACE));
166: PetscCall(PetscSFBcastEnd(sf, MPIU_INT, rootdata, leafdata, MPI_REPLACE));
167: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Bcast Rootdata\n"));
168: PetscCall(PetscIntView(nrootsalloc, rootdata, PETSC_VIEWER_STDOUT_WORLD));
169: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Bcast Leafdata\n"));
170: PetscCall(PetscIntView(nleavesalloc, leafdata, PETSC_VIEWER_STDOUT_WORLD));
171: PetscCall(PetscFree2(rootdata, leafdata));
172: }
174: if (test_bcast && test_char) { /* Bcast with char */
175: PetscInt len;
176: char buf[256];
177: char *rootdata, *leafdata;
178: PetscCall(PetscMalloc2(nrootsalloc, &rootdata, nleavesalloc, &leafdata));
179: /* Set rootdata buffer to be broadcast */
180: for (i = 0; i < nrootsalloc; i++) rootdata[i] = '*';
181: for (i = 0; i < nroots; i++) rootdata[i * stride] = 'A' + rank * 3 + i; /* rank is very small, so it is fine to compute a char */
182: /* Initialize local buffer, these values are never used. */
183: for (i = 0; i < nleavesalloc; i++) leafdata[i] = '?';
185: PetscCall(PetscSFBcastBegin(sf, MPI_CHAR, rootdata, leafdata, MPI_REPLACE));
186: PetscCall(PetscSFBcastEnd(sf, MPI_CHAR, rootdata, leafdata, MPI_REPLACE));
188: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Bcast Rootdata in type of char\n"));
189: len = 0;
190: PetscCall(PetscSNPrintf(buf, 256, "%4d:", rank));
191: len += 5;
192: for (i = 0; i < nrootsalloc; i++) {
193: PetscCall(PetscSNPrintf(buf + len, 256 - len, "%5c", rootdata[i]));
194: len += 5;
195: }
196: PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "%s\n", buf));
197: PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
199: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Bcast Leafdata in type of char\n"));
200: len = 0;
201: PetscCall(PetscSNPrintf(buf, 256, "%4d:", rank));
202: len += 5;
203: for (i = 0; i < nleavesalloc; i++) {
204: PetscCall(PetscSNPrintf(buf + len, 256 - len, "%5c", leafdata[i]));
205: len += 5;
206: }
207: PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "%s\n", buf));
208: PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
210: PetscCall(PetscFree2(rootdata, leafdata));
211: }
213: if (test_bcastop) { /* Reduce rootdata into leafdata */
214: PetscInt *rootdata, *leafdata;
215: /* Allocate space for send and receive buffers. This example communicates PetscInt, but other types, including
216: * user-defined structures, could also be used. */
217: PetscCall(PetscMalloc2(nrootsalloc, &rootdata, nleavesalloc, &leafdata));
218: /* Set rootdata buffer to be broadcast */
219: for (i = 0; i < nrootsalloc; i++) rootdata[i] = -1;
220: for (i = 0; i < nroots; i++) rootdata[i * stride] = 100 * (rank + 1) + i;
221: /* Set leaf values to reduce with */
222: for (i = 0; i < nleavesalloc; i++) leafdata[i] = -10 * (rank + 1) - i;
223: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Pre-BcastAndOp Leafdata\n"));
224: PetscCall(PetscIntView(nleavesalloc, leafdata, PETSC_VIEWER_STDOUT_WORLD));
225: /* Broadcast entries from rootdata to leafdata. Computation or other communication can be performed between the begin and end calls. */
226: PetscCall(PetscSFBcastBegin(sf, MPIU_INT, rootdata, leafdata, mop));
227: PetscCall(PetscSFBcastEnd(sf, MPIU_INT, rootdata, leafdata, mop));
228: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## BcastAndOp Rootdata\n"));
229: PetscCall(PetscIntView(nrootsalloc, rootdata, PETSC_VIEWER_STDOUT_WORLD));
230: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## BcastAndOp Leafdata\n"));
231: PetscCall(PetscIntView(nleavesalloc, leafdata, PETSC_VIEWER_STDOUT_WORLD));
232: PetscCall(PetscFree2(rootdata, leafdata));
233: }
235: if (test_reduce) { /* Reduce leafdata into rootdata */
236: PetscInt *rootdata, *leafdata;
237: PetscCall(PetscMalloc2(nrootsalloc, &rootdata, nleavesalloc, &leafdata));
238: /* Initialize rootdata buffer in which the result of the reduction will appear. */
239: for (i = 0; i < nrootsalloc; i++) rootdata[i] = -1;
240: for (i = 0; i < nroots; i++) rootdata[i * stride] = 100 * (rank + 1) + i;
241: /* Set leaf values to reduce. */
242: for (i = 0; i < nleavesalloc; i++) leafdata[i] = -1;
243: for (i = 0; i < nleaves; i++) leafdata[i * stride] = 1000 * (rank + 1) + 10 * i;
244: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Pre-Reduce Rootdata\n"));
245: PetscCall(PetscIntView(nrootsalloc, rootdata, PETSC_VIEWER_STDOUT_WORLD));
246: /* Perform reduction. Computation or other communication can be performed between the begin and end calls.
247: * This example sums the values, but other MPI_Ops can be used (e.g MPI_MAX, MPI_PROD). */
248: PetscCall(PetscSFReduceBegin(sf, MPIU_INT, leafdata, rootdata, mop));
249: PetscCall(PetscSFReduceEnd(sf, MPIU_INT, leafdata, rootdata, mop));
250: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Reduce Leafdata\n"));
251: PetscCall(PetscIntView(nleavesalloc, leafdata, PETSC_VIEWER_STDOUT_WORLD));
252: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Reduce Rootdata\n"));
253: PetscCall(PetscIntView(nrootsalloc, rootdata, PETSC_VIEWER_STDOUT_WORLD));
254: PetscCall(PetscFree2(rootdata, leafdata));
255: }
257: if (test_reduce && test_char) { /* Reduce with signed char */
258: PetscInt len;
259: char buf[256];
260: signed char *rootdata, *leafdata;
261: PetscCall(PetscMalloc2(nrootsalloc, &rootdata, nleavesalloc, &leafdata));
262: /* Initialize rootdata buffer in which the result of the reduction will appear. */
263: for (i = 0; i < nrootsalloc; i++) rootdata[i] = -1;
264: for (i = 0; i < nroots; i++) rootdata[i * stride] = 10 * (rank + 1) + i;
265: /* Set leaf values to reduce. */
266: for (i = 0; i < nleavesalloc; i++) leafdata[i] = -1;
267: for (i = 0; i < nleaves; i++) leafdata[i * stride] = 50 * (rank + 1) + 10 * i;
268: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Pre-Reduce Rootdata in type of signed char\n"));
270: len = 0;
271: PetscCall(PetscSNPrintf(buf, 256, "%4d:", rank));
272: len += 5;
273: for (i = 0; i < nrootsalloc; i++) {
274: PetscCall(PetscSNPrintf(buf + len, 256 - len, "%5d", rootdata[i]));
275: len += 5;
276: }
277: PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "%s\n", buf));
278: PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
280: /* Using MPI_CHAR should trigger an error since MPI standard does not support reduction on MPI_CHAR.
281: Testing with -test_op max, one can see the sign does take effect in MPI_MAX.
282: */
283: PetscCall(PetscSFReduceBegin(sf, MPI_SIGNED_CHAR, leafdata, rootdata, mop));
284: PetscCall(PetscSFReduceEnd(sf, MPI_SIGNED_CHAR, leafdata, rootdata, mop));
286: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Reduce Leafdata in type of signed char\n"));
287: len = 0;
288: PetscCall(PetscSNPrintf(buf, 256, "%4d:", rank));
289: len += 5;
290: for (i = 0; i < nleavesalloc; i++) {
291: PetscCall(PetscSNPrintf(buf + len, 256 - len, "%5d", leafdata[i]));
292: len += 5;
293: }
294: PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "%s\n", buf));
295: PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
297: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Reduce Rootdata in type of signed char\n"));
298: len = 0;
299: PetscCall(PetscSNPrintf(buf, 256, "%4d:", rank));
300: len += 5;
301: for (i = 0; i < nrootsalloc; i++) {
302: PetscCall(PetscSNPrintf(buf + len, 256 - len, "%5d", rootdata[i]));
303: len += 5;
304: }
305: PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "%s\n", buf));
306: PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
308: PetscCall(PetscFree2(rootdata, leafdata));
309: }
311: if (test_reduce && test_char) { /* Reduce with unsigned char */
312: PetscInt len;
313: char buf[256];
314: unsigned char *rootdata, *leafdata;
315: PetscCall(PetscMalloc2(nrootsalloc, &rootdata, nleavesalloc, &leafdata));
316: /* Initialize rootdata buffer in which the result of the reduction will appear. */
317: for (i = 0; i < nrootsalloc; i++) rootdata[i] = 0;
318: for (i = 0; i < nroots; i++) rootdata[i * stride] = 10 * (rank + 1) + i;
319: /* Set leaf values to reduce. */
320: for (i = 0; i < nleavesalloc; i++) leafdata[i] = 0;
321: for (i = 0; i < nleaves; i++) leafdata[i * stride] = 50 * (rank + 1) + 10 * i;
322: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Pre-Reduce Rootdata in type of unsigned char\n"));
324: len = 0;
325: PetscCall(PetscSNPrintf(buf, 256, "%4d:", rank));
326: len += 5;
327: for (i = 0; i < nrootsalloc; i++) {
328: PetscCall(PetscSNPrintf(buf + len, 256 - len, "%5u", rootdata[i]));
329: len += 5;
330: }
331: PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "%s\n", buf));
332: PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
334: /* Using MPI_CHAR should trigger an error since MPI standard does not support reduction on MPI_CHAR.
335: Testing with -test_op max, one can see the sign does take effect in MPI_MAX.
336: */
337: PetscCall(PetscSFReduceBegin(sf, MPI_UNSIGNED_CHAR, leafdata, rootdata, mop));
338: PetscCall(PetscSFReduceEnd(sf, MPI_UNSIGNED_CHAR, leafdata, rootdata, mop));
340: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Reduce Leafdata in type of unsigned char\n"));
341: len = 0;
342: PetscCall(PetscSNPrintf(buf, 256, "%4d:", rank));
343: len += 5;
344: for (i = 0; i < nleavesalloc; i++) {
345: PetscCall(PetscSNPrintf(buf + len, 256 - len, "%5u", leafdata[i]));
346: len += 5;
347: }
348: PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "%s\n", buf));
349: PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
351: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Reduce Rootdata in type of unsigned char\n"));
352: len = 0;
353: PetscCall(PetscSNPrintf(buf, 256, "%4d:", rank));
354: len += 5;
355: for (i = 0; i < nrootsalloc; i++) {
356: PetscCall(PetscSNPrintf(buf + len, 256 - len, "%5u", rootdata[i]));
357: len += 5;
358: }
359: PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "%s\n", buf));
360: PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
362: PetscCall(PetscFree2(rootdata, leafdata));
363: }
365: if (test_degree) {
366: const PetscInt *degree;
367: PetscCall(PetscSFComputeDegreeBegin(sf, °ree));
368: PetscCall(PetscSFComputeDegreeEnd(sf, °ree));
369: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Root degrees\n"));
370: PetscCall(PetscIntView(nrootsalloc, degree, PETSC_VIEWER_STDOUT_WORLD));
371: }
373: if (test_fetchandop) {
374: /* Cannot use text compare here because token ordering is not deterministic */
375: PetscInt *leafdata, *leafupdate, *rootdata;
376: PetscCall(PetscMalloc3(nleavesalloc, &leafdata, nleavesalloc, &leafupdate, nrootsalloc, &rootdata));
377: for (i = 0; i < nleavesalloc; i++) leafdata[i] = -1;
378: for (i = 0; i < nleaves; i++) leafdata[i * stride] = 1;
379: for (i = 0; i < nrootsalloc; i++) rootdata[i] = -1;
380: for (i = 0; i < nroots; i++) rootdata[i * stride] = 0;
381: PetscCall(PetscSFFetchAndOpBegin(sf, MPIU_INT, rootdata, leafdata, leafupdate, mop));
382: PetscCall(PetscSFFetchAndOpEnd(sf, MPIU_INT, rootdata, leafdata, leafupdate, mop));
383: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Rootdata (sum of 1 from each leaf)\n"));
384: PetscCall(PetscIntView(nrootsalloc, rootdata, PETSC_VIEWER_STDOUT_WORLD));
385: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Leafupdate (value at roots prior to my atomic update)\n"));
386: PetscCall(PetscIntView(nleavesalloc, leafupdate, PETSC_VIEWER_STDOUT_WORLD));
387: PetscCall(PetscFree3(leafdata, leafupdate, rootdata));
388: }
390: if (test_gather) {
391: const PetscInt *degree;
392: PetscInt inedges, *indata, *outdata;
393: PetscCall(PetscSFComputeDegreeBegin(sf, °ree));
394: PetscCall(PetscSFComputeDegreeEnd(sf, °ree));
395: for (i = 0, inedges = 0; i < nrootsalloc; i++) inedges += degree[i];
396: PetscCall(PetscMalloc2(inedges, &indata, nleavesalloc, &outdata));
397: for (i = 0; i < nleavesalloc; i++) outdata[i] = -1;
398: for (i = 0; i < nleaves; i++) outdata[i * stride] = 1000 * (rank + 1) + i;
399: PetscCall(PetscSFGatherBegin(sf, MPIU_INT, outdata, indata));
400: PetscCall(PetscSFGatherEnd(sf, MPIU_INT, outdata, indata));
401: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Gathered data at multi-roots from leaves\n"));
402: PetscCall(PetscIntView(inedges, indata, PETSC_VIEWER_STDOUT_WORLD));
403: PetscCall(PetscFree2(indata, outdata));
404: }
406: if (test_scatter) {
407: const PetscInt *degree;
408: PetscInt j, count, inedges, *indata, *outdata;
409: PetscCall(PetscSFComputeDegreeBegin(sf, °ree));
410: PetscCall(PetscSFComputeDegreeEnd(sf, °ree));
411: for (i = 0, inedges = 0; i < nrootsalloc; i++) inedges += degree[i];
412: PetscCall(PetscMalloc2(inedges, &indata, nleavesalloc, &outdata));
413: for (i = 0; i < nleavesalloc; i++) outdata[i] = -1;
414: for (i = 0, count = 0; i < nrootsalloc; i++) {
415: for (j = 0; j < degree[i]; j++) indata[count++] = 1000 * (rank + 1) + 100 * i + j;
416: }
417: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Data at multi-roots, to scatter to leaves\n"));
418: PetscCall(PetscIntView(inedges, indata, PETSC_VIEWER_STDOUT_WORLD));
420: PetscCall(PetscSFScatterBegin(sf, MPIU_INT, indata, outdata));
421: PetscCall(PetscSFScatterEnd(sf, MPIU_INT, indata, outdata));
422: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Scattered data at leaves\n"));
423: PetscCall(PetscIntView(nleavesalloc, outdata, PETSC_VIEWER_STDOUT_WORLD));
424: PetscCall(PetscFree2(indata, outdata));
425: }
427: if (test_embed) {
428: const PetscInt nroots = 1 + (PetscInt)(rank == 0);
429: PetscInt selected[2];
430: PetscSF esf;
432: selected[0] = stride;
433: selected[1] = 2 * stride;
434: PetscCall(PetscSFCreateEmbeddedRootSF(sf, nroots, selected, &esf));
435: PetscCall(PetscSFSetUp(esf));
436: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Embedded PetscSF\n"));
437: PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_INFO_DETAIL));
438: PetscCall(PetscSFView(esf, PETSC_VIEWER_STDOUT_WORLD));
439: PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD));
440: PetscCall(PetscSFDestroy(&esf));
441: }
443: if (test_invert) {
444: const PetscInt *degree;
445: PetscInt *mRootsOrigNumbering;
446: PetscInt inedges;
447: PetscSF msf, imsf;
449: PetscCall(PetscSFGetMultiSF(sf, &msf));
450: PetscCall(PetscSFCreateInverseSF(msf, &imsf));
451: PetscCall(PetscSFSetUp(msf));
452: PetscCall(PetscSFSetUp(imsf));
453: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Multi-SF\n"));
454: PetscCall(PetscSFView(msf, PETSC_VIEWER_STDOUT_WORLD));
455: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Multi-SF roots indices in original SF roots numbering\n"));
456: PetscCall(PetscSFComputeDegreeBegin(sf, °ree));
457: PetscCall(PetscSFComputeDegreeEnd(sf, °ree));
458: PetscCall(PetscSFComputeMultiRootOriginalNumbering(sf, degree, &inedges, &mRootsOrigNumbering));
459: PetscCall(PetscIntView(inedges, mRootsOrigNumbering, PETSC_VIEWER_STDOUT_WORLD));
460: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Inverse of Multi-SF\n"));
461: PetscCall(PetscSFView(imsf, PETSC_VIEWER_STDOUT_WORLD));
462: PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "## Inverse of Multi-SF, original numbering\n"));
463: PetscCall(PetscSFViewCustomLocals_Private(imsf, mRootsOrigNumbering, PETSC_VIEWER_STDOUT_WORLD));
464: PetscCall(PetscSFDestroy(&imsf));
465: PetscCall(PetscFree(mRootsOrigNumbering));
466: }
468: /* Clean storage for star forest. */
469: PetscCall(PetscSFDestroy(&sf));
470: PetscCall(PetscFinalize());
471: return 0;
472: }
474: /*TEST
476: test:
477: nsize: 4
478: filter: grep -v "type" | grep -v "sort"
479: args: -test_bcast -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create dynamic allocate}}
480: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
482: test:
483: suffix: 2
484: nsize: 4
485: filter: grep -v "type" | grep -v "sort"
486: args: -test_reduce -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create dynamic allocate}}
487: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
489: test:
490: suffix: 2_basic
491: nsize: 4
492: args: -test_reduce -sf_type basic
494: test:
495: suffix: 3
496: nsize: 4
497: filter: grep -v "type" | grep -v "sort"
498: args: -test_degree -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create dynamic allocate}}
499: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
501: test:
502: suffix: 3_basic
503: nsize: 4
504: args: -test_degree -sf_type basic
506: test:
507: suffix: 4
508: nsize: 4
509: filter: grep -v "type" | grep -v "sort"
510: args: -test_gather -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create dynamic allocate}}
511: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
513: test:
514: suffix: 4_basic
515: nsize: 4
516: args: -test_gather -sf_type basic
518: test:
519: suffix: 4_stride
520: nsize: 4
521: args: -test_gather -sf_type basic -stride 2
523: test:
524: suffix: 5
525: nsize: 4
526: filter: grep -v "type" | grep -v "sort"
527: args: -test_scatter -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create dynamic allocate}}
528: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
530: test:
531: suffix: 5_basic
532: nsize: 4
533: args: -test_scatter -sf_type basic
535: test:
536: suffix: 5_stride
537: nsize: 4
538: args: -test_scatter -sf_type basic -stride 2
540: test:
541: suffix: 6
542: nsize: 4
543: filter: grep -v "type" | grep -v "sort"
544: # No -sf_window_flavor dynamic due to bug https://gitlab.com/petsc/petsc/issues/555
545: args: -test_embed -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create allocate}}
546: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
548: test:
549: suffix: 6_basic
550: nsize: 4
551: args: -test_embed -sf_type basic
553: test:
554: suffix: 7
555: nsize: 4
556: filter: grep -v "type" | grep -v "sort"
557: args: -test_invert -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create dynamic allocate}}
558: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
560: test:
561: suffix: 7_basic
562: nsize: 4
563: args: -test_invert -sf_type basic
565: test:
566: suffix: basic
567: nsize: 4
568: args: -test_bcast -sf_type basic
569: output_file: output/ex1_1_basic.out
571: test:
572: suffix: bcastop_basic
573: nsize: 4
574: args: -test_bcastop -sf_type basic
575: output_file: output/ex1_bcastop_basic.out
577: test:
578: suffix: 8
579: nsize: 3
580: filter: grep -v "type" | grep -v "sort"
581: args: -test_bcast -test_sf_distribute -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create dynamic allocate}}
582: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
584: test:
585: suffix: 8_basic
586: nsize: 3
587: args: -test_bcast -test_sf_distribute -sf_type basic
589: test:
590: suffix: 9_char
591: nsize: 4
592: args: -sf_type basic -test_bcast -test_reduce -test_op max -test_char
594: # Here we do not test -sf_window_flavor dynamic since it is designed for repeated SFs with few different rootdata pointers
595: test:
596: suffix: 10
597: filter: grep -v "type" | grep -v "sort"
598: nsize: 4
599: args: -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create allocate}} -test_all -test_bcastop 0 -test_fetchandop 0
600: requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
602: # The nightly test suite with MPICH uses ch3:sock, which is broken when winsize == 0 in some of the processes
603: test:
604: suffix: 10_shared
605: output_file: output/ex1_10.out
606: filter: grep -v "type" | grep -v "sort"
607: nsize: 4
608: args: -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor shared -test_all -test_bcastop 0 -test_fetchandop 0
609: requires: defined(PETSC_HAVE_MPI_PROCESS_SHARED_MEMORY) !defined(PETSC_HAVE_MPICH_NUMVERSION) defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)
611: test:
612: suffix: 10_basic
613: nsize: 4
614: args: -sf_type basic -test_all -test_bcastop 0 -test_fetchandop 0
616: TEST*/