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         smpi_host_data_t mydata = SIMIX_process_get_data(SIMIX_process_self());
   8   smx_process_t self;
   9   smx_host_t shost;
  10
  11   int index;
  12
  13   xbt_fifo_t request_queue;
  14
  15   int running_hosts_count;
  16
  17   smpi_mpi_request_t request;
  18
  19   smx_host_t dhost;
  20
  21   smx_action_t action;
  22
  23   e_surf_action_state_t state;
  24
  25   smpi_received_message_t message;
  26
  27   int dindex;
  28
  29   smx_process_t receiver_process;
  30
  31   self = SIMIX_process_self();
  32   shost = SIMIX_host_self();
  33
  34   index = mydata->index;
  35
  36   request_queue = smpi_global->pending_send_request_queues[index];
  37
  38   do {
  39
  40     request = xbt_fifo_shift(request_queue);
  41
  42     if (NULL == request) {
  43       SIMIX_process_suspend(self);
  44     } else {
  45
  46       message = xbt_mallocator_get(smpi_global->message_mallocator);
  47
  48       SIMIX_mutex_lock(request->mutex);
  49
  50       message->comm = request->comm;
  51       message->src = request->comm->index_to_rank_map[index];
  52       message->tag = request->tag;
  53       message->data = request->data;
  54       message->buf = xbt_malloc(request->datatype->size * request->count);
  55       memcpy(message->buf, request->buf,
  56              request->datatype->size * request->count);
  57
  58       dindex = request->comm->rank_to_index_map[request->dst];
  59       dhost = smpi_global->hosts[dindex];
  60
  61       message->forward = (request->forward - 1) / 2;
  62       request->forward = request->forward / 2;
  63
  64       if (0 < request->forward) {
  65         request->dst =
  66           (request->dst + message->forward + 1) % request->comm->size;
  67         xbt_fifo_push(request_queue, request);
  68       } else {
  69         request->completed = 1;
  70       }
  71
  72       action =
  73         SIMIX_action_communicate(shost, dhost, "communication",
  74                                  request->datatype->size * request->count,
  75                                  -1.0);
  76
  77       SIMIX_register_action_to_condition(action, request->cond);
  78
  79       for (state = SIMIX_action_get_state(action);
  80            state == SURF_ACTION_READY ||
  81            state == SURF_ACTION_RUNNING;
  82            state = SIMIX_action_get_state(action)
  83         ) {
  84         SIMIX_cond_wait(request->cond, request->mutex);
  85       }
  86
  87       xbt_fifo_push(smpi_global->received_message_queues[dindex], message);
  88
  89       SIMIX_unregister_action_to_condition(action, request->cond);
  90       SIMIX_action_destroy(action);
  91
  92       SIMIX_mutex_unlock(request->mutex);
  93
  94       // wake up receiver if necessary
  95       smpi_host_data_t remote_host = SIMIX_host_get_data(SIMIX_process_get_host(smpi_global->main_processes[dindex]));
  96       receiver_process = remote_host->receiver;
  97       if (SIMIX_process_is_suspended(receiver_process))
  98         SIMIX_process_resume(receiver_process);
  99     }
 100
 101     running_hosts_count = smpi_global->running_hosts_count;
 102
 103   } while (0 < running_hosts_count);
 104
 105   return 0;
 106 }