src/smpi/smpi_sender.c

   1 #include "private.h"
   2
   3 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_sender, smpi,
   4                                 "Logging specific to SMPI (sender)");
   5
   6 int smpi_sender(int argc, char *argv[])
   7 {
   8   smpi_process_data_t mydata = SIMIX_process_get_data(SIMIX_process_self());
   9   smx_process_t self;
  10   smx_host_t shost;
  11
  12   int index;
  13
  14   xbt_fifo_t request_queue;
  15
  16   smpi_mpi_request_t request;
  17
  18   smx_host_t dhost;
  19
  20   smx_action_t action;
  21
  22   e_surf_action_state_t state;
  23
  24   smpi_received_message_t message;
  25
  26   int dindex;
  27
  28   self = SIMIX_process_self();
  29   shost = SIMIX_host_self();
  30
  31   index = mydata->index;
  32
  33   request_queue = mydata->pending_send_request_queue;
  34
  35   while (1) {
  36     request = xbt_fifo_shift(request_queue);
  37
  38     if (NULL != request) {
  39       message = xbt_mallocator_get(smpi_global->message_mallocator);
  40
  41       SIMIX_mutex_lock(request->mutex);
  42
  43       message->comm = request->comm;
  44       message->src = request->comm->index_to_rank_map[index];
  45       message->tag = request->tag;
  46       message->data = request->data;
  47       message->buf = xbt_malloc(request->datatype->size * request->count);
  48       memcpy(message->buf, request->buf,
  49              request->datatype->size * request->count);
  50
  51       dindex = request->comm->rank_to_index_map[request->dst];
  52       smpi_process_data_t remote_process =
  53         SIMIX_process_get_data(smpi_global->main_processes[dindex]);
  54       dhost = SIMIX_process_get_host(smpi_global->main_processes[dindex]);
  55
  56       message->forward = (request->forward - 1) / 2;
  57       request->forward = request->forward / 2;
  58
  59       if (0 < request->forward) {
  60         request->dst =
  61           (request->dst + message->forward + 1) % request->comm->size;
  62         xbt_fifo_push(request_queue, request);
  63       } else {
  64         request->completed = 1;
  65       }
  66
  67       action =
  68         SIMIX_action_communicate(shost, dhost, "communication",
  69                                  request->datatype->size * request->count,
  70                                  -1.0);
  71
  72       SIMIX_register_action_to_condition(action, request->cond);
  73
  74       for (state = SIMIX_action_get_state(action);
  75            state == SURF_ACTION_READY ||
  76            state == SURF_ACTION_RUNNING;
  77            state = SIMIX_action_get_state(action)
  78         ) {
  79         SIMIX_cond_wait(request->cond, request->mutex);
  80       }
  81
  82       xbt_fifo_push(remote_process->received_message_queue, message);
  83
  84       SIMIX_unregister_action_to_condition(action, request->cond);
  85       SIMIX_action_destroy(action);
  86
  87       SIMIX_mutex_unlock(request->mutex);
  88
  89       // wake up receiver if necessary
  90       SIMIX_process_resume(remote_process->receiver);
  91
  92     } else if (mydata->finalize > 0) {  /* main wants me to die and nothing to do */
  93       mydata->finalize--;
  94       SIMIX_cond_signal(mydata->cond);
  95       return 0;
  96     } else {
  97       SIMIX_process_suspend(self);
  98     }
  99   }
 100   return 0;
 101 }