1 /* Copyright (c) 2009-2018. 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. */
6 #include "simgrid/kernel/routing/ClusterZone.hpp"
7 #include "simgrid/kernel/routing/NetPoint.hpp"
8 #include "simgrid/kernel/routing/RoutedZone.hpp"
9 #include "src/surf/network_interface.hpp"
10 #include "src/surf/xml/platf_private.hpp" // FIXME: RouteCreationArgs and friends
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_cluster, surf, "Routing part of surf");
14 /* This routing is specifically setup to represent clusters, aka homogeneous sets of machines
15 * Note that a router is created, easing the interconnexion with the rest of the world. */
20 ClusterZone::ClusterZone(NetZoneImpl* father, std::string name) : NetZoneImpl(father, name) {}
22 void ClusterZone::get_local_route(NetPoint* src, NetPoint* dst, RouteCreationArgs* route, double* lat)
24 XBT_VERB("cluster getLocalRoute from '%s'[%u] to '%s'[%u]", src->get_cname(), src->id(), dst->get_cname(), dst->id());
25 xbt_assert(not private_links_.empty(),
26 "Cluster routing: no links attached to the source node - did you use host_link tag?");
28 if ((src->id() == dst->id()) && has_loopback_) {
29 xbt_assert(not src->is_router(), "Routing from a cluster private router to itself is meaningless");
31 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(node_pos(src->id()));
32 route->link_list.push_back(info.first);
34 *lat += info.first->get_latency();
38 if (not src->is_router()) { // No private link for the private router
39 if (has_limiter_) { // limiter for sender
40 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(node_pos_with_loopback(src->id()));
41 route->link_list.push_back(info.first);
44 std::pair<resource::LinkImpl*, resource::LinkImpl*> info =
45 private_links_.at(node_pos_with_loopback_limiter(src->id()));
46 if (info.first) { // link up
47 route->link_list.push_back(info.first);
49 *lat += info.first->get_latency();
54 route->link_list.push_back(backbone_);
56 *lat += backbone_->get_latency();
59 if (not dst->is_router()) { // No specific link for router
61 std::pair<resource::LinkImpl*, resource::LinkImpl*> info =
62 private_links_.at(node_pos_with_loopback_limiter(dst->id()));
63 if (info.second) { // link down
64 route->link_list.push_back(info.second);
66 *lat += info.second->get_latency();
68 if (has_limiter_) { // limiter for receiver
69 info = private_links_.at(node_pos_with_loopback(dst->id()));
70 route->link_list.push_back(info.first);
75 void ClusterZone::get_graph(xbt_graph_t graph, std::map<std::string, xbt_node_t>* nodes,
76 std::map<std::string, xbt_edge_t>* edges)
79 "Malformed cluster. This may be because your platform file is a hypergraph while it must be a graph.");
81 /* create the router */
82 xbt_node_t routerNode = new_xbt_graph_node(graph, router_->get_cname(), nodes);
84 xbt_node_t backboneNode = nullptr;
86 backboneNode = new_xbt_graph_node(graph, backbone_->get_cname(), nodes);
87 new_xbt_graph_edge(graph, routerNode, backboneNode, edges);
90 for (auto const& src : get_vertices()) {
91 if (not src->is_router()) {
92 xbt_node_t previous = new_xbt_graph_node(graph, src->get_cname(), nodes);
94 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(src->id());
96 if (info.first) { // link up
97 xbt_node_t current = new_xbt_graph_node(graph, info.first->get_cname(), nodes);
98 new_xbt_graph_edge(graph, previous, current, edges);
101 new_xbt_graph_edge(graph, current, backboneNode, edges);
103 new_xbt_graph_edge(graph, current, routerNode, edges);
107 if (info.second) { // link down
108 xbt_node_t current = new_xbt_graph_node(graph, info.second->get_cname(), nodes);
109 new_xbt_graph_edge(graph, previous, current, edges);
112 new_xbt_graph_edge(graph, current, backboneNode, edges);
114 new_xbt_graph_edge(graph, current, routerNode, edges);
121 void ClusterZone::create_links_for_node(ClusterCreationArgs* cluster, int id, int /*rank*/, unsigned int position)
123 std::string link_id = cluster->id + "_link_" + std::to_string(id);
125 LinkCreationArgs link;
127 link.bandwidth = cluster->bw;
128 link.latency = cluster->lat;
129 link.policy = cluster->sharing_policy;
130 sg_platf_new_link(&link);
134 if (link.policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
135 linkUp = s4u::Link::by_name(link_id + "_UP");
136 linkDown = s4u::Link::by_name(link_id + "_DOWN");
138 linkUp = s4u::Link::by_name(link_id);
141 private_links_.insert({position, {linkUp->get_impl(), linkDown->get_impl()}});