src/smpi/smpi_base.c

   1 #include "private.h"
   2
   3 SMPI_MPI_Global_t smpi_mpi_global = NULL;
   4
   5 void smpi_mpi_land_func(void *x, void *y, void *z)
   6 {
   7         *(int *)z = *(int *)x && *(int *)y;
   8 }
   9
  10 void smpi_mpi_sum_func(void *x, void *y, void *z)
  11 {
  12         *(int *)z = *(int *)x + *(int *)y;
  13 }
  14
  15 int inline smpi_mpi_comm_size(smpi_mpi_communicator_t *comm)
  16 {
  17         return comm->size;
  18 }
  19
  20 // FIXME: smarter algorithm?
  21 int smpi_mpi_comm_rank(smpi_mpi_communicator_t *comm, smx_host_t host)
  22 {
  23         int i;
  24
  25         for(i = comm->size - 1; i > 0 && host != comm->simdata->hosts[i]; i--);
  26
  27         return i;
  28 }
  29
  30 int inline smpi_mpi_comm_rank_self(smpi_mpi_communicator_t *comm)
  31 {
  32         return smpi_mpi_comm_rank(comm, SIMIX_host_self());
  33 }
  34
  35 void smpi_mpi_init()
  36 {
  37         smx_process_t process;
  38         smx_host_t host;
  39         smx_host_t *hosts;
  40         int size;
  41
  42         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
  43         smpi_global->running_hosts_count++;
  44         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
  45
  46         // initialize some local variables
  47         process = SIMIX_process_self();
  48         host    = SIMIX_host_self();
  49         hosts   = SIMIX_host_get_table();
  50         size    = SIMIX_host_get_number();
  51
  52         // node 0 sets the globals
  53         if (host == hosts[0]) {
  54
  55                 smpi_mpi_global                                = xbt_new(s_SMPI_MPI_Global_t, 1);
  56
  57                 // global communicator
  58                 smpi_mpi_global->mpi_comm_world                         = xbt_new(smpi_mpi_communicator_t, 1);
  59                 smpi_mpi_global->mpi_comm_world->size                   = size;
  60                 smpi_mpi_global->mpi_comm_world->simdata                = xbt_new(s_smpi_mpi_communicator_simdata_t, 1);
  61                 smpi_mpi_global->mpi_comm_world->simdata->barrier_count = 0;
  62                 smpi_mpi_global->mpi_comm_world->simdata->barrier_mutex = SIMIX_mutex_init();
  63                 smpi_mpi_global->mpi_comm_world->simdata->barrier_cond  = SIMIX_cond_init();
  64                 smpi_mpi_global->mpi_comm_world->simdata->hosts         = hosts;
  65                 smpi_mpi_global->mpi_comm_world->simdata->processes     = xbt_new(smx_process_t, size);
  66                 smpi_mpi_global->mpi_comm_world->simdata->processes[0]  = process;
  67
  68                 // mpi datatypes
  69                 smpi_mpi_global->mpi_byte                      = xbt_new(smpi_mpi_datatype_t, 1);
  70                 smpi_mpi_global->mpi_byte->size                = (size_t)1;
  71                 smpi_mpi_global->mpi_int                       = xbt_new(smpi_mpi_datatype_t, 1);
  72                 smpi_mpi_global->mpi_int->size                 = sizeof(int);
  73                 smpi_mpi_global->mpi_double                    = xbt_new(smpi_mpi_datatype_t, 1);
  74                 smpi_mpi_global->mpi_double->size              = sizeof(double);
  75
  76                 // mpi operations
  77                 smpi_mpi_global->mpi_land                      = xbt_new(smpi_mpi_op_t, 1);
  78                 smpi_mpi_global->mpi_land->func                = smpi_mpi_land_func;
  79                 smpi_mpi_global->mpi_sum                       = xbt_new(smpi_mpi_op_t, 1);
  80                 smpi_mpi_global->mpi_sum->func                 = smpi_mpi_sum_func;
  81
  82                 // signal all nodes to perform initialization
  83                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
  84                 smpi_global->root_ready = 1;
  85                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
  86                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
  87
  88         } else {
  89
  90                 // make sure root is done before own initialization
  91                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
  92                 if (!smpi_global->root_ready) {
  93                         SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
  94                 }
  95                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
  96
  97                 smpi_mpi_global->mpi_comm_world->simdata->processes[smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world)] = process;
  98         }
  99
 100         // wait for all nodes to signal initializatin complete
 101         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 102         smpi_global->ready_process_count++;
 103         if (smpi_global->ready_process_count < 3 * size) {
 104                 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 105         } else {
 106                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 107         }
 108         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 109
 110         return;
 111 }
 112
 113 void smpi_mpi_finalize()
 114 {
 115         int i;
 116
 117         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
 118         i = --smpi_global->running_hosts_count;
 119         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
 120
 121         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 122         smpi_global->ready_process_count--;
 123         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 124
 125         if (0 >= i) {
 126
 127                 // wake up senders/receivers
 128                 for (i = 0; i < smpi_mpi_global->mpi_comm_world->size; i++) {
 129                         if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 130                                 SIMIX_process_resume(smpi_global->sender_processes[i]);
 131                         }
 132                         if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 133                                 SIMIX_process_resume(smpi_global->receiver_processes[i]);
 134                         }
 135                 }
 136
 137                 SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->simdata->barrier_mutex);
 138                 SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->simdata->barrier_cond);
 139                 xbt_free(smpi_mpi_global->mpi_comm_world->simdata->processes);
 140                 xbt_free(smpi_mpi_global->mpi_comm_world->simdata);
 141                 xbt_free(smpi_mpi_global->mpi_comm_world);
 142
 143                 xbt_free(smpi_mpi_global->mpi_byte);
 144                 xbt_free(smpi_mpi_global->mpi_int);
 145                 xbt_free(smpi_mpi_global->mpi_double);
 146
 147                 xbt_free(smpi_mpi_global->mpi_land);
 148                 xbt_free(smpi_mpi_global->mpi_sum);
 149
 150                 xbt_free(smpi_mpi_global);
 151
 152         }
 153
 154 }
 155
 156 void smpi_barrier(smpi_mpi_communicator_t *comm)
 157 {
 158
 159         SIMIX_mutex_lock(comm->simdata->barrier_mutex);
 160         if(++comm->simdata->barrier_count < comm->size) {
 161                 SIMIX_cond_wait(comm->simdata->barrier_cond, comm->simdata->barrier_mutex);
 162         } else {
 163                 comm->simdata->barrier_count = 0;
 164                 SIMIX_cond_broadcast(comm->simdata->barrier_cond);
 165         }
 166         SIMIX_mutex_unlock(comm->simdata->barrier_mutex);
 167
 168         return;
 169 }
 170
 171 int smpi_create_request(void *buf, int count, smpi_mpi_datatype_t *datatype,
 172         int src, int dst, int tag, smpi_mpi_communicator_t *comm, smpi_mpi_request_t **request)
 173 {
 174         int retval = MPI_SUCCESS;
 175
 176         *request = NULL;
 177
 178         if (0 > count) {
 179                 retval = MPI_ERR_COUNT;
 180         } else if (NULL == buf) {
 181                 retval = MPI_ERR_INTERN;
 182         } else if (NULL == datatype) {
 183                 retval = MPI_ERR_TYPE;
 184         } else if (NULL == comm) {
 185                 retval = MPI_ERR_COMM;
 186         } else if (MPI_ANY_SOURCE != src && (0 > src || comm->size <= src)) {
 187                 retval = MPI_ERR_RANK;
 188         } else if (0 > dst || comm->size <= dst) {
 189                 retval = MPI_ERR_RANK;
 190         } else if (0 > tag) {
 191                 retval = MPI_ERR_TAG;
 192         } else {
 193                 *request = xbt_mallocator_get(smpi_global->request_mallocator);
 194                 (*request)->comm       = comm;
 195                 (*request)->src        = src;
 196                 (*request)->dst        = dst;
 197                 (*request)->tag        = tag;
 198                 (*request)->buf        = buf;
 199                 (*request)->count      = count;
 200                 (*request)->datatype   = datatype;
 201         }
 202         return retval;
 203 }
 204
 205 int smpi_isend(smpi_mpi_request_t *request)
 206 {
 207         int retval = MPI_SUCCESS;
 208         int rank   = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
 209
 210         if (NULL != request) {
 211                 SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[rank]);
 212                 xbt_fifo_push(smpi_global->pending_send_request_queues[rank], request);
 213                 SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[rank]);
 214         }
 215
 216         if (SIMIX_process_is_suspended(smpi_global->sender_processes[rank])) {
 217                 SIMIX_process_resume(smpi_global->sender_processes[rank]);
 218         }
 219
 220         return retval;
 221 }
 222
 223 int smpi_irecv(smpi_mpi_request_t *request)
 224 {
 225         int retval = MPI_SUCCESS;
 226         int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
 227
 228         if (NULL != request) {
 229                 SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[rank]);
 230                 xbt_fifo_push(smpi_global->pending_recv_request_queues[rank], request);
 231                 SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[rank]);
 232         }
 233
 234         if (SIMIX_process_is_suspended(smpi_global->receiver_processes[rank])) {
 235                 SIMIX_process_resume(smpi_global->receiver_processes[rank]);
 236         }
 237
 238         return retval;
 239 }
 240
 241 void smpi_wait(smpi_mpi_request_t *request, smpi_mpi_status_t *status)
 242 {
 243         if (NULL != request) {
 244                 SIMIX_mutex_lock(request->simdata->mutex);
 245                 if (!request->completed) {
 246                         // SIMIX_cond_wait(request->simdata->cond, request->simdata->mutex);
 247                 }
 248                 if (NULL != status) {
 249                         status->MPI_SOURCE = request->src;
 250                 }
 251                 SIMIX_mutex_unlock(request->simdata->mutex);
 252         }
 253 }