1 /* Copyright (c) 2012-2020. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
8 XBT_LOG_NEW_DEFAULT_CATEGORY(broadcaster, "Messages specific for the broadcaster");
10 static chain_message_t chain_message_new(sg_mailbox_t prev, sg_mailbox_t next, const unsigned int num_pieces)
12 chain_message_t msg = xbt_malloc(sizeof(s_chain_message_t));
15 msg->num_pieces = num_pieces;
20 static void broadcaster_build_chain(broadcaster_t bc)
22 /* Build the chain if there's at least one peer */
23 if (bc->host_count > 0)
24 bc->first = bc->mailboxes[0];
26 for (unsigned i = 0; i < bc->host_count; i++) {
27 sg_mailbox_t prev = i > 0 ? bc->mailboxes[i - 1] : NULL;
28 sg_mailbox_t next = i < bc->host_count - 1 ? bc->mailboxes[i + 1] : NULL;
29 XBT_DEBUG("Building chain--broadcaster:\"%s\" dest:\"%s\" prev:\"%s\" next:\"%s\"", sg_host_self_get_name(),
30 sg_mailbox_get_name(bc->mailboxes[i]), prev ? sg_mailbox_get_name(prev) : NULL,
31 next ? sg_mailbox_get_name(next) : NULL);
32 /* Send message to current peer */
33 sg_mailbox_put(bc->mailboxes[i], chain_message_new(prev, next, bc->piece_count), MESSAGE_BUILD_CHAIN_SIZE);
37 static void broadcaster_send_file(const_broadcaster_t bc)
39 int nb_pending_sends = 0;
41 for (unsigned int current_piece = 0; current_piece < bc->piece_count; current_piece++) {
42 XBT_DEBUG("Sending (send) piece %u from %s into mailbox %s", current_piece, sg_host_self_get_name(),
43 sg_mailbox_get_name(bc->first));
44 char* file_piece = bprintf("piece-%u", current_piece);
45 sg_comm_t comm = sg_mailbox_put_async(bc->first, file_piece, MESSAGE_SEND_DATA_HEADER_SIZE + PIECE_SIZE);
46 bc->pending_sends[nb_pending_sends++] = comm;
48 sg_comm_wait_all(bc->pending_sends, nb_pending_sends);
51 static broadcaster_t broadcaster_init(sg_mailbox_t* mailboxes, unsigned int host_count, unsigned int piece_count)
53 broadcaster_t bc = xbt_malloc(sizeof(s_broadcaster_t));
56 bc->host_count = host_count;
57 bc->piece_count = piece_count;
58 bc->mailboxes = mailboxes;
59 bc->pending_sends = xbt_malloc(sizeof(sg_comm_t) * MAX_PENDING_COMMS);
61 broadcaster_build_chain(bc);
66 static void broadcaster_destroy(broadcaster_t bc)
68 free(bc->pending_sends);
73 /** Emitter function */
74 void broadcaster(int argc, char* argv[])
76 XBT_DEBUG("broadcaster");
78 unsigned int host_count = (unsigned int)xbt_str_parse_int(argv[1], "Invalid number of peers: %s");
80 sg_mailbox_t* mailboxes = xbt_malloc(sizeof(sg_mailbox_t) * host_count);
82 for (unsigned int i = 1; i <= host_count; i++) {
83 char* name = bprintf("node-%u.simgrid.org", i);
84 XBT_DEBUG("%s", name);
85 mailboxes[i - 1] = sg_mailbox_by_name(name);
89 unsigned int piece_count = (unsigned int)xbt_str_parse_int(argv[2], "Invalid number of pieces: %s");
91 broadcaster_t bc = broadcaster_init(mailboxes, host_count, piece_count);
93 broadcaster_send_file(bc);
95 broadcaster_destroy(bc);