1 /* Copyright (c) 2009-2019. 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, const std::string& name, resource::NetworkModel* netmodel)
21 : NetZoneImpl(father, name, netmodel)
25 void ClusterZone::get_local_route(NetPoint* src, NetPoint* dst, RouteCreationArgs* route, double* lat)
27 XBT_VERB("cluster getLocalRoute from '%s'[%u] to '%s'[%u]", src->get_cname(), src->id(), dst->get_cname(), dst->id());
28 xbt_assert(not private_links_.empty(),
29 "Cluster routing: no links attached to the source node - did you use host_link tag?");
31 if ((src->id() == dst->id()) && has_loopback_) {
32 if (src->is_router()) {
33 XBT_WARN("Routing from a cluster private router to itself is meaningless");
35 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(node_pos(src->id()));
36 route->link_list.push_back(info.first);
38 *lat += info.first->get_latency();
43 if (not src->is_router()) { // No private link for the private router
44 if (has_limiter_) { // limiter for sender
45 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(node_pos_with_loopback(src->id()));
46 route->link_list.push_back(info.first);
49 std::pair<resource::LinkImpl*, resource::LinkImpl*> info =
50 private_links_.at(node_pos_with_loopback_limiter(src->id()));
51 if (info.first) { // link up
52 route->link_list.push_back(info.first);
54 *lat += info.first->get_latency();
59 route->link_list.push_back(backbone_);
61 *lat += backbone_->get_latency();
64 if (not dst->is_router()) { // No specific link for router
66 std::pair<resource::LinkImpl*, resource::LinkImpl*> info =
67 private_links_.at(node_pos_with_loopback_limiter(dst->id()));
68 if (info.second) { // link down
69 route->link_list.push_back(info.second);
71 *lat += info.second->get_latency();
73 if (has_limiter_) { // limiter for receiver
74 info = private_links_.at(node_pos_with_loopback(dst->id()));
75 route->link_list.push_back(info.first);
80 void ClusterZone::get_graph(xbt_graph_t graph, std::map<std::string, xbt_node_t>* nodes,
81 std::map<std::string, xbt_edge_t>* edges)
84 "Malformed cluster. This may be because your platform file is a hypergraph while it must be a graph.");
86 /* create the router */
87 xbt_node_t routerNode = new_xbt_graph_node(graph, router_->get_cname(), nodes);
89 xbt_node_t backboneNode = nullptr;
91 backboneNode = new_xbt_graph_node(graph, backbone_->get_cname(), nodes);
92 new_xbt_graph_edge(graph, routerNode, backboneNode, edges);
95 for (auto const& src : get_vertices()) {
96 if (not src->is_router()) {
97 xbt_node_t previous = new_xbt_graph_node(graph, src->get_cname(), nodes);
99 std::pair<resource::LinkImpl*, resource::LinkImpl*> info = private_links_.at(src->id());
101 if (info.first) { // link up
102 xbt_node_t current = new_xbt_graph_node(graph, info.first->get_cname(), nodes);
103 new_xbt_graph_edge(graph, previous, current, edges);
106 new_xbt_graph_edge(graph, current, backboneNode, edges);
108 new_xbt_graph_edge(graph, current, routerNode, edges);
112 if (info.second) { // link down
113 xbt_node_t current = new_xbt_graph_node(graph, info.second->get_cname(), nodes);
114 new_xbt_graph_edge(graph, previous, current, edges);
117 new_xbt_graph_edge(graph, current, backboneNode, edges);
119 new_xbt_graph_edge(graph, current, routerNode, edges);
126 void ClusterZone::create_links_for_node(ClusterCreationArgs* cluster, int id, int /*rank*/, unsigned int position)
128 std::string link_id = cluster->id + "_link_" + std::to_string(id);
130 LinkCreationArgs link;
132 link.bandwidths.push_back(cluster->bw);
133 link.latency = cluster->lat;
134 link.policy = cluster->sharing_policy;
135 sg_platf_new_link(&link);
139 if (link.policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
140 linkUp = s4u::Link::by_name(link_id + "_UP");
141 linkDown = s4u::Link::by_name(link_id + "_DOWN");
143 linkUp = s4u::Link::by_name(link_id);
146 private_links_.insert({position, {linkUp->get_impl(), linkDown->get_impl()}});