3 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_receiver, smpi,
4 "Logging specific to SMPI (receiver)");
6 int smpi_receiver(int argc, char **argv)
11 xbt_fifo_t request_queue;
12 xbt_fifo_t message_queue;
14 int running_hosts_count;
16 smpi_mpi_request_t request;
17 smpi_received_message_t message;
19 xbt_fifo_item_t request_item;
20 xbt_fifo_item_t message_item;
22 self = SIMIX_process_self();
24 index = smpi_host_index();
26 request_queue = smpi_global->pending_recv_request_queues[index];
27 message_queue = smpi_global->received_message_queues[index];
29 smpi_global->receiver_processes[index] = self;
33 // FIXME: better algorithm, maybe some kind of balanced tree? or a heap?
35 for (request_item = xbt_fifo_get_first_item(request_queue);
37 request_item = xbt_fifo_get_next_item(request_item)) {
38 request = xbt_fifo_get_item_content(request_item);
39 for (message_item = xbt_fifo_get_first_item(message_queue);
41 message_item = xbt_fifo_get_next_item(message_item)) {
42 message = xbt_fifo_get_item_content(message_item);
43 if (request->comm == message->comm &&
44 (MPI_ANY_SOURCE == request->src || request->src == message->src)
45 && (MPI_ANY_TAG == request->tag || request->tag == message->tag)) {
46 xbt_fifo_remove_item(request_queue, request_item);
47 xbt_fifo_free_item(request_item);
48 xbt_fifo_remove_item(message_queue, message_item);
49 xbt_fifo_free_item(message_item);
59 if (NULL == request || NULL == message) {
60 SIMIX_process_suspend(self);
63 SIMIX_mutex_lock(request->mutex);
64 memcpy(request->buf, message->buf,
65 request->datatype->size * request->count);
66 request->src = message->src;
67 request->data = message->data;
68 request->forward = message->forward;
70 if (0 == request->forward) {
71 request->completed = 1;
72 SIMIX_cond_broadcast(request->cond);
74 request->src = request->comm->index_to_rank_map[index];
75 request->dst = (request->src + 1) % request->comm->size;
76 smpi_mpi_isend(request);
79 SIMIX_mutex_unlock(request->mutex);
81 xbt_free(message->buf);
82 xbt_mallocator_release(smpi_global->message_mallocator, message);
86 running_hosts_count = smpi_global->running_hosts_count;
88 } while (0 < running_hosts_count);