3 int smpi_receiver(int argc, char **argv)
8 xbt_fifo_t request_queue;
9 smx_mutex_t request_queue_mutex;
10 xbt_fifo_t message_queue;
11 smx_mutex_t message_queue_mutex;
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();
23 rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
25 // make sure root is done before own initialization
26 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
27 if (!smpi_global->root_ready) {
28 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
30 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
32 request_queue = smpi_global->pending_recv_request_queues[rank];
33 request_queue_mutex = smpi_global->pending_recv_request_queues_mutexes[rank];
34 message_queue = smpi_global->received_message_queues[rank];
35 message_queue_mutex = smpi_global->received_message_queues_mutexes[rank];
36 size = smpi_mpi_comm_size(smpi_mpi_global->mpi_comm_world);
38 smpi_global->receiver_processes[rank] = self;
40 // wait for all nodes to signal initializatin complete
41 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
42 smpi_global->ready_process_count++;
43 if (smpi_global->ready_process_count < 3 * size) {
44 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
46 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
48 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
54 // FIXME: better algorithm, maybe some kind of balanced tree? or a heap?
56 // FIXME: not the best way to request multiple locks...
57 SIMIX_mutex_lock(request_queue_mutex);
58 SIMIX_mutex_lock(message_queue_mutex);
59 for (request_item = xbt_fifo_get_first_item(request_queue);
61 request_item = xbt_fifo_get_next_item(request_item)) {
62 request = xbt_fifo_get_item_content(request_item);
63 for (message_item = xbt_fifo_get_first_item(message_queue);
65 message_item = xbt_fifo_get_next_item(message_item)) {
66 message = xbt_fifo_get_item_content(message_item);
67 if (request->comm == message->comm &&
68 (MPI_ANY_SOURCE == request->src || request->src == message->src) &&
69 request->tag == message->tag) {
70 xbt_fifo_remove_item(request_queue, request_item);
71 xbt_fifo_remove_item(message_queue, message_item);
77 SIMIX_mutex_unlock(message_queue_mutex);
78 SIMIX_mutex_unlock(request_queue_mutex);
80 if (NULL == request || NULL == message) {
81 SIMIX_process_suspend(self);
83 SIMIX_mutex_lock(request->simdata->mutex);
85 memcpy(request->buf, message->buf, request->datatype->size * request->count);
86 request->src = message->src;
87 request->completed = 1;
88 SIMIX_cond_broadcast(request->simdata->cond);
90 SIMIX_mutex_unlock(request->simdata->mutex);
92 xbt_free(message->buf);
93 xbt_mallocator_release(smpi_global->message_mallocator, message);
96 SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
97 running_hosts_count = smpi_global->running_hosts_count;
98 SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
100 } while (0 < running_hosts_count);