1 /* Copyright (c) 2012. The SimGrid Team.
2 * 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. */
5 #include "bittorrent.h"
9 #include <simgrid/platf_generator.h>
11 * Bittorrent example launcher, using a generated platform
14 static RngStream rng_stream;
16 void promoter(context_node_t node);
17 void labeler(context_edge_t edge);
18 void create_environment(int node_count);
19 void dispatch_jobs(double tracker_deadline, double peer_deadline,
20 double seed_percentage);
22 void promoter(context_node_t node)
24 s_sg_platf_host_cbarg_t host_parameters;
26 if (node->degree == 1) {
27 //We promote only the leaf; as we use a star topology, all the nodes
28 //will be promoted except the first one, which will be a router with
29 //every hosts connected on.
30 host_parameters.id = NULL;
32 //Power from 3,000,000 to 10,000,000
33 host_parameters.power_peak =
34 7000000 * RngStream_RandU01(rng_stream) + 3000000;
35 host_parameters.core_amount = 1;
36 host_parameters.power_scale = 1;
37 host_parameters.power_trace = NULL;
38 host_parameters.initial_state = SURF_RESOURCE_ON;
39 host_parameters.state_trace = NULL;
40 host_parameters.coord = NULL;
41 host_parameters.properties = NULL;
43 platf_graph_promote_to_host(node, &host_parameters);
47 void labeler(context_edge_t edge)
50 s_sg_platf_link_cbarg_t link_parameters;
51 link_parameters.id = NULL;
53 //bandwidth from 3,000,000 to 10,000,000
54 link_parameters.bandwidth = 7000000 * RngStream_RandU01(rng_stream) + 3000000;
55 link_parameters.bandwidth_trace = NULL;
57 //Latency from 0ms to 100ms
58 link_parameters.latency = RngStream_RandU01(rng_stream) / 10.0;
59 link_parameters.latency_trace = NULL;
60 link_parameters.state = SURF_RESOURCE_ON;
61 link_parameters.state_trace = NULL;
62 link_parameters.policy = SURF_LINK_SHARED;
63 link_parameters.properties = NULL;
65 platf_graph_link_label(edge, &link_parameters);
68 void create_environment(int node_count)
71 platf_graph_uniform(node_count);
73 //every nodes are connected to the first one
74 platf_graph_interconnect_star();
75 //No need to check if the graph is connected, the star topology implies it.
77 //register promoter and labeler
78 platf_graph_promoter(promoter);
79 platf_graph_labeler(labeler);
81 //promoting and labeling
85 //Put the platform into the simulator
89 void dispatch_jobs(double tracker_deadline, double peer_deadline,
90 double seed_percentage)
93 xbt_dynar_t available_nodes = MSG_hosts_as_dynar();
97 char **arguments_tracker;
98 char **arguments_peer;
100 unsigned int seed_count =
101 (seed_percentage / 100.0) * xbt_dynar_length(available_nodes);
103 xbt_dynar_foreach(available_nodes, i, host) {
105 //The fisrt node is the tracker
106 arguments_tracker = xbt_malloc0(sizeof(char *) * 2);
107 arguments_tracker[0] = xbt_strdup("tracker");
108 arguments_tracker[1] = bprintf("%f", tracker_deadline);
109 MSG_process_create_with_arguments("tracker", tracker, NULL, host, 2,
112 //Other nodes are peers
114 arguments_peer = xbt_malloc0(sizeof(char *) * 4);
115 arguments_peer[0] = xbt_strdup("peer");
116 arguments_peer[1] = bprintf("%d", i);
117 arguments_peer[2] = bprintf("%f", peer_deadline);
119 //The first peers will be seeders
120 if (seed_count > 0) {
122 arguments_peer[3] = xbt_strdup("1");
126 arguments_peer[3] = NULL;
129 MSG_process_create_with_arguments("peer", peer, NULL, host,
130 argument_size, arguments_peer);
135 int main(int argc, char *argv[])
137 MSG_init(&argc, argv);
139 rng_stream = RngStream_CreateStream(NULL);
141 //Maybe these parameters should be set from the command line...
142 //create_environment(<node_count>)
143 create_environment(20);
145 //dispatch_jobs(<tracker_deadline>, <peer_deadline>, <seed_percentage>)
146 dispatch_jobs(2000, 2000, 10);