3 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_mpi, smpi, "Logging specific to SMPI (mpi)");
5 int SMPI_MPI_Init(int *argc, char ***argv)
12 int SMPI_MPI_Finalize()
19 // right now this just exits the current node, should send abort signal to all
20 // hosts in the communicator;
21 int SMPI_MPI_Abort(MPI_Comm comm, int errorcode)
27 int SMPI_MPI_Comm_size(MPI_Comm comm, int *size)
29 int retval = MPI_SUCCESS;
34 retval = MPI_ERR_COMM;
35 } else if (NULL == size) {
46 int SMPI_MPI_Comm_rank(MPI_Comm comm, int *rank)
48 int retval = MPI_SUCCESS;
53 retval = MPI_ERR_COMM;
54 } else if (NULL == rank) {
57 *rank = smpi_mpi_comm_rank(comm);
65 int SMPI_MPI_Type_size(MPI_Datatype datatype, size_t *size)
67 int retval = MPI_SUCCESS;
71 if (NULL == datatype) {
72 retval = MPI_ERR_TYPE;
73 } else if (NULL == size) {
76 *size = datatype->size;
84 int SMPI_MPI_Barrier(MPI_Comm comm)
86 int retval = MPI_SUCCESS;
91 retval = MPI_ERR_COMM;
93 retval = smpi_mpi_barrier(comm);
101 int SMPI_MPI_Irecv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Request *request)
103 int retval = MPI_SUCCESS;
107 retval = smpi_create_request(buf, count, datatype, src, 0, tag, comm, request);
108 if (NULL != *request && MPI_SUCCESS == retval) {
109 retval = smpi_mpi_irecv(*request);
117 int SMPI_MPI_Recv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Status *status)
119 int retval = MPI_SUCCESS;
120 smpi_mpi_request_t request;
124 retval = smpi_create_request(buf, count, datatype, src, 0, tag, comm, &request);
125 if (NULL != request && MPI_SUCCESS == retval) {
126 retval = smpi_mpi_irecv(request);
127 if (MPI_SUCCESS == retval) {
128 retval = smpi_mpi_wait(request, status);
130 xbt_mallocator_release(smpi_global->request_mallocator, request);
138 int SMPI_MPI_Isend(void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm, MPI_Request *request)
140 int retval = MPI_SUCCESS;
144 retval = smpi_create_request(buf, count, datatype, 0, dst, tag, comm, request);
145 if (NULL != *request && MPI_SUCCESS == retval) {
146 retval = smpi_mpi_isend(*request);
154 int SMPI_MPI_Send(void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
156 int retval = MPI_SUCCESS;
157 smpi_mpi_request_t request;
161 retval = smpi_create_request(buf, count, datatype, 0, dst, tag, comm, &request);
162 if (NULL != request && MPI_SUCCESS == retval) {
163 retval = smpi_mpi_isend(request);
164 if (MPI_SUCCESS == retval) {
165 smpi_mpi_wait(request, MPI_STATUS_IGNORE);
167 xbt_mallocator_release(smpi_global->request_mallocator, request);
175 int SMPI_MPI_Wait(MPI_Request *request, MPI_Status *status) {
176 return smpi_mpi_wait(*request, status);
179 int SMPI_MPI_Bcast(void *buf, int count, MPI_Datatype datatype, int root, MPI_Comm comm) {
181 int retval = MPI_SUCCESS;
183 smpi_mpi_request_t request;
187 rank = smpi_mpi_comm_rank(comm);
190 retval = smpi_create_request(buf, count, datatype, root, (root + 1) % comm->size, 0, comm, &request);
191 request->forward = comm->size - 1;
192 smpi_mpi_isend(request);
194 retval = smpi_create_request(buf, count, datatype, MPI_ANY_SOURCE, rank, 0, comm, &request);
195 smpi_mpi_irecv(request);
198 smpi_mpi_wait(request, MPI_STATUS_IGNORE);
199 xbt_mallocator_release(smpi_global->request_mallocator, request);
206 // FIXME: should be in utilities
207 int smpi_compare_rankkeys(const void *a, const void *b);
208 int smpi_compare_rankkeys(const void *a, const void *b) {
212 if (x[1] < y[1]) return -1;
215 if (x[0] < y[0]) return -1;
216 if (x[0] == y[0]) return 0;
223 // FIXME: needs to return null in event of MPI_UNDEFINED color...
224 // FIXME: seriously, this isn't pretty
225 int SMPI_MPI_Comm_split(MPI_Comm comm, int color, int key, MPI_Comm *comm_out)
227 int retval = MPI_SUCCESS;
230 smpi_mpi_request_t request;
232 smpi_mpi_status_t status;
236 // FIXME: need to test parameters
238 index = smpi_host_index();
239 rank = comm->index_to_rank_map[index];
242 int colormap[comm->size];
243 int keymap[comm->size];
244 int rankkeymap[comm->size * 2];
246 smpi_mpi_communicator_t tempcomm = NULL;
254 // FIXME: use scatter/gather or similar instead of individual comms
255 for (i = 1; i < comm->size; i++) {
256 retval = smpi_create_request(colorkey, 2, MPI_INT, MPI_ANY_SOURCE,
257 rank, MPI_ANY_TAG, comm, &request);
258 smpi_mpi_irecv(request);
259 smpi_mpi_wait(request, &status);
260 colormap[status.MPI_SOURCE] = colorkey[0];
261 keymap[status.MPI_SOURCE] = colorkey[1];
262 xbt_mallocator_release(smpi_global->request_mallocator, request);
265 for (i = 0; i < comm->size; i++) {
266 if (-1 == colormap[i]) {
269 colortmp = colormap[i];
271 for (j = i; j < comm->size; j++) {
272 if(colortmp == colormap[j]) {
274 rankkeymap[keycount * 2] = j;
275 rankkeymap[keycount * 2 + 1] = keymap[j];
279 qsort(rankkeymap, keycount, sizeof(int) * 2, &smpi_compare_rankkeys);
280 tempcomm = xbt_new(s_smpi_mpi_communicator_t, 1);
281 tempcomm->barrier_count = 0;
282 tempcomm->size = keycount;
283 tempcomm->barrier_mutex = SIMIX_mutex_init();
284 tempcomm->barrier_cond = SIMIX_cond_init();
285 tempcomm->rank_to_index_map = xbt_new(int, keycount);
286 tempcomm->index_to_rank_map = xbt_new(int, smpi_global->host_count);
287 for (j = 0; j < smpi_global->host_count; j++) {
288 tempcomm->index_to_rank_map[j] = -1;
290 for (j = 0; j < keycount; j++) {
291 indextmp = comm->rank_to_index_map[rankkeymap[j*2]];
292 tempcomm->rank_to_index_map[j] = indextmp;
293 tempcomm->index_to_rank_map[indextmp] = j;
295 for (j = 0; j < keycount; j++) {
296 if (rankkeymap[j*2]) {
297 retval = smpi_create_request(&j, 1, MPI_INT, 0,
298 rankkeymap[j*2], 0, comm, &request);
299 request->data = tempcomm;
300 smpi_mpi_isend(request);
301 smpi_mpi_wait(request, &status);
302 xbt_mallocator_release(smpi_global->request_mallocator, request);
304 *comm_out = tempcomm;
311 retval = smpi_create_request(colorkey, 2, MPI_INT, rank, 0, 0, comm, &request);
312 smpi_mpi_isend(request);
313 smpi_mpi_wait(request, &status);
314 xbt_mallocator_release(smpi_global->request_mallocator, request);
315 retval = smpi_create_request(colorkey, 1, MPI_INT, 0, rank, 0, comm, &request);
316 smpi_mpi_irecv(request);
317 smpi_mpi_wait(request, &status);
318 *comm_out = request->data;