1 /* Copyright (c) 2009-2021. 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 interconnection with the rest of the world. */
20 ClusterZone::ClusterZone(const std::string& name) : NetZoneImpl(name) {}
22 void ClusterZone::set_loopback()
24 num_links_per_node_++;
28 void ClusterZone::set_limiter()
30 num_links_per_node_++;
34 void ClusterZone::add_private_link_at(unsigned int position, std::pair<resource::LinkImpl*, resource::LinkImpl*> link)
36 private_links_.insert({position, link});
39 void ClusterZone::get_local_route(NetPoint* src, NetPoint* dst, RouteCreationArgs* route, double* lat)
41 XBT_VERB("cluster getLocalRoute from '%s'[%u] to '%s'[%u]", src->get_cname(), src->id(), dst->get_cname(), dst->id());
42 xbt_assert(not private_links_.empty(),
43 "Cluster routing: no links attached to the source node - did you use host_link tag?");
45 if ((src->id() == dst->id()) && has_loopback_) {
46 if (src->is_router()) {
47 XBT_WARN("Routing from a cluster private router to itself is meaningless");
49 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(node_pos(src->id()));
50 route->link_list.push_back(info.first);
52 *lat += info.first->get_latency();
57 if (not src->is_router()) { // No private link for the private router
58 if (has_limiter_) { // limiter for sender
59 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(node_pos_with_loopback(src->id()));
60 route->link_list.push_back(info.first);
63 std::pair<resource::LinkImpl*, resource::LinkImpl*> info =
64 private_links_.at(node_pos_with_loopback_limiter(src->id()));
65 if (info.first) { // link up
66 route->link_list.push_back(info.first);
68 *lat += info.first->get_latency();
73 route->link_list.push_back(backbone_);
75 *lat += backbone_->get_latency();
78 if (not dst->is_router()) { // No specific link for router
79 std::pair<resource::LinkImpl*, resource::LinkImpl*> info =
80 private_links_.at(node_pos_with_loopback_limiter(dst->id()));
82 if (info.second) { // link down
83 route->link_list.push_back(info.second);
85 *lat += info.second->get_latency();
87 if (has_limiter_) { // limiter for receiver
88 info = private_links_.at(node_pos_with_loopback(dst->id()));
89 route->link_list.push_back(info.first);
94 void ClusterZone::get_graph(const s_xbt_graph_t* graph, std::map<std::string, xbt_node_t, std::less<>>* nodes,
95 std::map<std::string, xbt_edge_t, std::less<>>* edges)
98 "Malformed cluster. This may be because your platform file is a hypergraph while it must be a graph.");
100 /* create the router */
101 xbt_node_t routerNode = new_xbt_graph_node(graph, router_->get_cname(), nodes);
103 xbt_node_t backboneNode = nullptr;
105 backboneNode = new_xbt_graph_node(graph, backbone_->get_cname(), nodes);
106 new_xbt_graph_edge(graph, routerNode, backboneNode, edges);
109 for (auto const& src : get_vertices()) {
110 if (not src->is_router()) {
111 xbt_node_t previous = new_xbt_graph_node(graph, src->get_cname(), nodes);
113 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(src->id());
115 if (info.first) { // link up
116 xbt_node_t current = new_xbt_graph_node(graph, info.first->get_cname(), nodes);
117 new_xbt_graph_edge(graph, previous, current, edges);
120 new_xbt_graph_edge(graph, current, backboneNode, edges);
122 new_xbt_graph_edge(graph, current, routerNode, edges);
126 if (info.second) { // link down
127 xbt_node_t current = new_xbt_graph_node(graph, info.second->get_cname(), nodes);
128 new_xbt_graph_edge(graph, previous, current, edges);
131 new_xbt_graph_edge(graph, current, backboneNode, edges);
133 new_xbt_graph_edge(graph, current, routerNode, edges);
140 void ClusterZone::create_links_for_node(ClusterCreationArgs* cluster, int id, int /*rank*/, unsigned int position)
142 std::string link_id = cluster->id + "_link_" + std::to_string(id);
144 LinkCreationArgs link;
146 link.bandwidths.push_back(cluster->bw);
147 link.latency = cluster->lat;
148 link.policy = cluster->sharing_policy;
149 sg_platf_new_link(&link);
151 const s4u::Link* linkUp;
152 const s4u::Link* linkDown;
153 if (link.policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
154 linkUp = s4u::Link::by_name(link_id + "_UP");
155 linkDown = s4u::Link::by_name(link_id + "_DOWN");
157 linkUp = s4u::Link::by_name(link_id);
160 private_links_.insert({position, {linkUp->get_impl(), linkDown->get_impl()}});
162 } // namespace routing
163 } // namespace kernel
166 NetZone* create_cluster_zone(const std::string& name)
168 return (new kernel::routing::ClusterZone(name))->get_iface();
172 } // namespace simgrid