src/smpi/smpi_mpi.c

   1 #include "private.h"
   2
   3 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_mpi, smpi, "Logging specific to SMPI (mpi)");
   4
   5 int SMPI_MPI_Init(int *argc, char ***argv)
   6 {
   7         smpi_mpi_init();
   8         smpi_bench_begin();
   9         return MPI_SUCCESS;
  10 }
  11
  12 int SMPI_MPI_Finalize()
  13 {
  14         smpi_bench_end();
  15         smpi_mpi_finalize();
  16         return MPI_SUCCESS;
  17 }
  18
  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)
  22 {
  23         smpi_exit(errorcode);
  24         return 0;
  25 }
  26
  27 int SMPI_MPI_Comm_size(MPI_Comm comm, int *size)
  28 {
  29         int retval = MPI_SUCCESS;
  30
  31         smpi_bench_end();
  32
  33         if (NULL == comm) {
  34                 retval = MPI_ERR_COMM;
  35         } else if (NULL == size) {
  36                 retval = MPI_ERR_ARG;
  37         } else {
  38                 *size = comm->size;
  39         }
  40
  41         smpi_bench_begin();
  42
  43         return retval;
  44 }
  45
  46 int SMPI_MPI_Comm_rank(MPI_Comm comm, int *rank)
  47 {
  48         int retval = MPI_SUCCESS;
  49
  50         smpi_bench_end();
  51
  52         if (NULL == comm) {
  53                 retval = MPI_ERR_COMM;
  54         } else if (NULL == rank) {
  55                 retval = MPI_ERR_ARG;
  56         } else {
  57                 *rank = smpi_mpi_comm_rank(comm);
  58         }
  59
  60         smpi_bench_begin();
  61
  62         return retval;
  63 }
  64
  65 int SMPI_MPI_Type_size(MPI_Datatype datatype, size_t *size)
  66 {
  67         int retval = MPI_SUCCESS;
  68
  69         smpi_bench_end();
  70
  71         if (NULL == datatype) {
  72                 retval = MPI_ERR_TYPE;
  73         } else if (NULL == size) {
  74                 retval = MPI_ERR_ARG;
  75         } else {
  76                 *size = datatype->size;
  77         }
  78
  79         smpi_bench_begin();
  80
  81         return retval;
  82 }
  83
  84 int SMPI_MPI_Barrier(MPI_Comm comm)
  85 {
  86         int retval = MPI_SUCCESS;
  87
  88         smpi_bench_end();
  89
  90         if (NULL == comm) {
  91                 retval = MPI_ERR_COMM;
  92         } else {
  93                 retval = smpi_mpi_barrier(comm);
  94         }
  95
  96         smpi_bench_begin();
  97
  98         return retval;
  99 }
 100
 101 int SMPI_MPI_Irecv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Request *request)
 102 {
 103         int retval = MPI_SUCCESS;
 104
 105         smpi_bench_end();
 106
 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);
 110         }
 111
 112         smpi_bench_begin();
 113
 114         return retval;
 115 }
 116
 117 int SMPI_MPI_Recv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Status *status)
 118 {
 119         int retval = MPI_SUCCESS;
 120         smpi_mpi_request_t request;
 121
 122         smpi_bench_end();
 123
 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);
 129                 }
 130                 xbt_mallocator_release(smpi_global->request_mallocator, request);
 131         }
 132
 133         smpi_bench_begin();
 134
 135         return retval;
 136 }
 137
 138 int SMPI_MPI_Isend(void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm, MPI_Request *request)
 139 {
 140         int retval = MPI_SUCCESS;
 141
 142         smpi_bench_end();
 143
 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);
 147         }
 148
 149         smpi_bench_begin();
 150
 151         return retval;
 152 }
 153
 154 int SMPI_MPI_Send(void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
 155 {
 156         int retval = MPI_SUCCESS;
 157         smpi_mpi_request_t request;
 158
 159         smpi_bench_end();
 160
 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);
 166                 }
 167                 xbt_mallocator_release(smpi_global->request_mallocator, request);
 168         }
 169
 170         smpi_bench_begin();
 171
 172         return retval;
 173 }
 174
 175 int SMPI_MPI_Wait(MPI_Request *request, MPI_Status *status) {
 176         return smpi_mpi_wait(*request, status);
 177 }
 178
 179 int SMPI_MPI_Bcast(void *buf, int count, MPI_Datatype datatype, int root, MPI_Comm comm) {
 180
 181         int retval = MPI_SUCCESS;
 182         int rank;
 183         smpi_mpi_request_t request;
 184
 185         smpi_bench_end();
 186
 187         rank = smpi_mpi_comm_rank(comm);
 188
 189         if (rank == root) {
 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);
 193         } else {
 194                 retval = smpi_create_request(buf, count, datatype, MPI_ANY_SOURCE, rank, 0, comm, &request);
 195                 smpi_mpi_irecv(request);
 196         }
 197
 198         smpi_mpi_wait(request, MPI_STATUS_IGNORE);
 199         xbt_mallocator_release(smpi_global->request_mallocator, request);
 200
 201         smpi_bench_begin();
 202
 203         return retval;
 204 }
 205
 206 // used by comm_split to sort ranks based on key values
 207 int smpi_compare_rankkeys(const void *a, const void *b);
 208 int smpi_compare_rankkeys(const void *a, const void *b) {
 209     int *x = (int *)a;
 210     int *y = (int *)b;
 211
 212     if (x[1] < y[1]) return -1;
 213
 214     if (x[1] == y[1]) {
 215         if (x[0] < y[0]) return -1;
 216         if (x[0] == y[0]) return 0;
 217         return 1;
 218     }
 219
 220     return 1;
 221 }
 222
 223 // FIXME: needs to return null in event of MPI_UNDEFINED color...
 224 int SMPI_MPI_Comm_split(MPI_Comm comm, int color, int key, MPI_Comm *comm_out)
 225 {
 226         int retval = MPI_SUCCESS;
 227
 228         int index, rank;
 229         smpi_mpi_request_t request;
 230         int colorkey[2];
 231         smpi_mpi_status_t status;
 232
 233         smpi_bench_end();
 234
 235         // FIXME: need to test parameters
 236
 237         index = smpi_host_index();
 238         rank  = comm->index_to_rank_map[index];
 239
 240         if (0 == rank) {
 241                 int colormap[comm->size];
 242         int keymap[comm->size];
 243         int rankkeymap[comm->size * 2];
 244                 int i, j;
 245                 smpi_mpi_communicator_t tempcomm = NULL;
 246                 int colortmp;
 247                 int keycount;
 248                 int indextmp;
 249
 250                 colormap[0] = color;
 251         keymap[0]   = key;
 252
 253                 // FIXME: use scatter/gather or similar instead of individual comms
 254                 for (i = 1; i < comm->size; i++) {
 255                         retval = smpi_create_request(colorkey, 2, MPI_INT, MPI_ANY_SOURCE,
 256                     rank, MPI_ANY_TAG, comm, &request);
 257                         smpi_mpi_irecv(request);
 258                         smpi_mpi_wait(request, &status);
 259                         colormap[status.MPI_SOURCE] = colorkey[0];
 260                         keymap[status.MPI_SOURCE]   = colorkey[1];
 261                         xbt_mallocator_release(smpi_global->request_mallocator, request);
 262                 }
 263
 264                 for (i = 0; i < comm->size; i++) {
 265                         if (-1 == colormap[i]) {
 266                                 continue;
 267                         }
 268                         colortmp = colormap[i];
 269                         keycount = 0;
 270                         for (j = i; j < comm->size; j++) {
 271                                 if(colortmp == colormap[j]) {
 272                                         colormap[j] = -1;
 273                                         rankkeymap[keycount * 2]     = j;
 274                                         rankkeymap[keycount * 2 + 1] = keymap[j];
 275                                         keycount++;
 276                                 }
 277                         }
 278             qsort(rankkeymap, keycount, sizeof(int) * 2, &smpi_compare_rankkeys);
 279                         tempcomm                    = xbt_new(s_smpi_mpi_communicator_t, 1);
 280                         tempcomm->barrier_count     = 0;
 281                         tempcomm->size              = keycount;
 282                         tempcomm->barrier_mutex     = SIMIX_mutex_init();
 283                         tempcomm->barrier_cond      = SIMIX_cond_init();
 284                         tempcomm->rank_to_index_map = xbt_new(int, keycount);
 285                         tempcomm->index_to_rank_map = xbt_new(int, smpi_global->host_count);
 286                         for (j = 0; j < smpi_global->host_count; j++) {
 287                                 tempcomm->index_to_rank_map[j] = -1;
 288                         }
 289                         for (j = 0; j < keycount; j++) {
 290                                 indextmp = comm->rank_to_index_map[rankkeymap[j*2]];
 291                                 tempcomm->rank_to_index_map[j]        = indextmp;
 292                                 tempcomm->index_to_rank_map[indextmp] = j;
 293                         }
 294                         for (j = 0; j < keycount; j++) {
 295                                 if (rankkeymap[j*2]) {
 296                                         retval = smpi_create_request(&j, 1, MPI_INT, 0,
 297                         rankkeymap[j*2], 0, comm, &request);
 298                                         request->data = tempcomm;
 299                                         smpi_mpi_isend(request);
 300                                         smpi_mpi_wait(request, &status);
 301                                         xbt_mallocator_release(smpi_global->request_mallocator,
 302                         request);
 303                                 } else {
 304                                         *comm_out = tempcomm;
 305                                 }
 306                         }
 307                 }
 308         } else {
 309                 colorkey[0] = color;
 310                 colorkey[1] = key;
 311                 retval = smpi_create_request(colorkey, 2, MPI_INT, rank, 0, 0, comm,
 312             &request);
 313                 smpi_mpi_isend(request);
 314                 smpi_mpi_wait(request, &status);
 315                 xbt_mallocator_release(smpi_global->request_mallocator, request);
 316                 retval = smpi_create_request(colorkey, 1, MPI_INT, 0, rank, 0, comm,
 317             &request);
 318                 smpi_mpi_irecv(request);
 319                 smpi_mpi_wait(request, &status);
 320                 *comm_out = request->data;
 321         }
 322
 323         smpi_bench_begin();
 324
 325         return retval;
 326 }