1 /* Copyright (c) 2006-2022. 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/NetPoint.hpp>
7 #include <simgrid/kernel/routing/NetZoneImpl.hpp>
8 #include <simgrid/s4u/Engine.hpp>
9 #include <simgrid/s4u/Host.hpp>
11 #include "src/include/simgrid/sg_config.hpp"
12 #include "src/kernel/EngineImpl.hpp"
13 #include "src/kernel/resource/CpuImpl.hpp"
14 #include "src/kernel/resource/DiskImpl.hpp"
15 #include "src/kernel/resource/SplitDuplexLinkImpl.hpp"
16 #include "src/surf/HostImpl.hpp"
18 #include "src/kernel/resource/StandardLinkImpl.hpp"
20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ker_routing, kernel, "Kernel routing-related information");
26 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
27 static void surf_config_models_setup()
29 std::string host_model_name = simgrid::config::get_value<std::string>("host/model");
30 std::string network_model_name = simgrid::config::get_value<std::string>("network/model");
31 std::string cpu_model_name = simgrid::config::get_value<std::string>("cpu/model");
32 std::string disk_model_name = simgrid::config::get_value<std::string>("disk/model");
34 /* The compound host model is needed when using non-default net/cpu models */
35 if ((not simgrid::config::is_default("network/model") || not simgrid::config::is_default("cpu/model")) &&
36 simgrid::config::is_default("host/model")) {
37 host_model_name = "compound";
38 simgrid::config::set_value("host/model", host_model_name);
41 XBT_DEBUG("host model: %s", host_model_name.c_str());
42 if (host_model_name == "compound") {
43 xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
44 xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
46 const auto* cpu_model = find_model_description(surf_cpu_model_description, cpu_model_name);
47 cpu_model->model_init_preparse();
49 const auto* network_model = find_model_description(surf_network_model_description, network_model_name);
50 network_model->model_init_preparse();
53 XBT_DEBUG("Call host_model_init");
54 const auto* host_model = find_model_description(surf_host_model_description, host_model_name);
55 host_model->model_init_preparse();
57 XBT_DEBUG("Call vm_model_init");
58 /* ideally we should get back the pointer to CpuModel from model_init_preparse(), but this
59 * requires changing the declaration of surf_cpu_model_description.
60 * To be reviewed in the future */
61 surf_vm_model_init_HL13(
62 simgrid::s4u::Engine::get_instance()->get_netzone_root()->get_impl()->get_cpu_pm_model().get());
64 XBT_DEBUG("Call disk_model_init");
65 const auto* disk_model = find_model_description(surf_disk_model_description, disk_model_name);
66 disk_model->model_init_preparse();
69 xbt::signal<void(bool symmetrical, kernel::routing::NetPoint* src, kernel::routing::NetPoint* dst,
70 kernel::routing::NetPoint* gw_src, kernel::routing::NetPoint* gw_dst,
71 std::vector<kernel::resource::StandardLinkImpl*> const& link_list)>
72 NetZoneImpl::on_route_creation;
74 NetZoneImpl::NetZoneImpl(const std::string& name) : piface_(this), name_(name)
76 auto* engine = s4u::Engine::get_instance();
77 /* workaroud: first netzoneImpl will be the root netzone.
78 * Without globals and with current surf_*_model_description init functions, we need
79 * the root netzone to exist when creating the models.
80 * This was usually done at sg_platf.cpp, during XML parsing */
81 if (not engine->get_netzone_root()) {
82 engine->set_netzone_root(&piface_);
83 /* root netzone set, initialize models */
84 simgrid::s4u::Engine::on_platform_creation();
86 /* Initialize the surf models. That must be done after we got all config, and before we need the models.
87 * That is, after the last <config> tag, if any, and before the first of cluster|peer|zone|trace|trace_cb
89 * I'm not sure for <trace> and <trace_cb>, there may be a bug here
90 * (FIXME: check it out by creating a file beginning with one of these tags)
91 * but cluster and peer come down to zone creations, so putting this verification here is correct.
93 surf_config_models_setup();
96 xbt_assert(nullptr == engine->netpoint_by_name_or_null(get_name()),
97 "Refusing to create a second NetZone called '%s'.", get_cname());
98 netpoint_ = new NetPoint(name_, NetPoint::Type::NetZone);
99 XBT_DEBUG("NetZone '%s' created with the id '%lu'", get_cname(), netpoint_->id());
100 _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
101 * any further config now that we created some real content */
102 simgrid::s4u::NetZone::on_creation(piface_); // notify the signal
105 NetZoneImpl::~NetZoneImpl()
107 for (auto const& nz : children_)
110 for (auto const& kv : bypass_routes_)
113 s4u::Engine::get_instance()->netpoint_unregister(netpoint_);
116 void NetZoneImpl::add_child(NetZoneImpl* new_zone)
118 xbt_assert(not sealed_, "Cannot add a new child to the sealed zone %s", get_cname());
119 /* set the parent behavior */
120 hierarchy_ = RoutingMode::recursive;
121 children_.push_back(new_zone);
124 /** @brief Returns the list of the hosts found in this NetZone (not recursively)
126 * Only the hosts that are directly contained in this NetZone are retrieved,
127 * not the ones contained in sub-netzones.
129 std::vector<s4u::Host*> NetZoneImpl::get_all_hosts() const
131 std::vector<s4u::Host*> res;
132 for (auto const& card : get_vertices()) {
133 s4u::Host* host = s4u::Host::by_name_or_null(card->get_name());
139 int NetZoneImpl::get_host_count() const
142 for (auto const& card : get_vertices()) {
143 const s4u::Host* host = s4u::Host::by_name_or_null(card->get_name());
150 s4u::Host* NetZoneImpl::create_host(const std::string& name, const std::vector<double>& speed_per_pstate)
152 xbt_assert(cpu_model_pm_,
153 "Impossible to create host: %s. Invalid CPU model: nullptr. Have you set the parent of this NetZone: %s?",
154 name.c_str(), get_cname());
155 xbt_assert(not sealed_, "Impossible to create host: %s. NetZone %s already sealed", name.c_str(), get_cname());
156 auto* res = (new resource::HostImpl(name))->get_iface();
157 res->set_netpoint((new NetPoint(name, NetPoint::Type::Host))->set_englobing_zone(this));
159 cpu_model_pm_->create_cpu(res, speed_per_pstate);
164 s4u::Link* NetZoneImpl::create_link(const std::string& name, const std::vector<double>& bandwidths)
168 "Impossible to create link: %s. Invalid network model: nullptr. Have you set the parent of this NetZone: %s?",
169 name.c_str(), get_cname());
170 xbt_assert(not sealed_, "Impossible to create link: %s. NetZone %s already sealed", name.c_str(), get_cname());
171 return network_model_->create_link(name, bandwidths)->get_iface();
174 s4u::SplitDuplexLink* NetZoneImpl::create_split_duplex_link(const std::string& name,
175 const std::vector<double>& bandwidths)
179 "Impossible to create link: %s. Invalid network model: nullptr. Have you set the parent of this NetZone: %s?",
180 name.c_str(), get_cname());
181 xbt_assert(not sealed_, "Impossible to create link: %s. NetZone %s already sealed", name.c_str(), get_cname());
183 auto* link_up = network_model_->create_link(name + "_UP", bandwidths);
184 auto* link_down = network_model_->create_link(name + "_DOWN", bandwidths);
185 auto link = std::make_unique<resource::SplitDuplexLinkImpl>(name, link_up, link_down);
186 auto* link_iface = link->get_iface();
187 EngineImpl::get_instance()->add_split_duplex_link(name, std::move(link));
191 s4u::Disk* NetZoneImpl::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
193 xbt_assert(disk_model_,
194 "Impossible to create disk: %s. Invalid disk model: nullptr. Have you set the parent of this NetZone: %s?",
195 name.c_str(), get_cname());
196 xbt_assert(not sealed_, "Impossible to create disk: %s. NetZone %s already sealed", name.c_str(), get_cname());
197 auto* l = disk_model_->create_disk(name, read_bandwidth, write_bandwidth);
199 return l->get_iface();
202 NetPoint* NetZoneImpl::create_router(const std::string& name)
204 xbt_assert(nullptr == s4u::Engine::get_instance()->netpoint_by_name_or_null(name),
205 "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
206 xbt_assert(not sealed_, "Impossible to create router: %s. NetZone %s already sealed", name.c_str(), get_cname());
208 return (new NetPoint(name, NetPoint::Type::Router))->set_englobing_zone(this);
211 unsigned long NetZoneImpl::add_component(NetPoint* elm)
213 vertices_.push_back(elm);
214 return vertices_.size() - 1; // The rank of the newly created object
217 std::vector<resource::StandardLinkImpl*> NetZoneImpl::get_link_list_impl(const std::vector<s4u::LinkInRoute>& link_list,
218 bool backroute) const
220 std::vector<resource::StandardLinkImpl*> links;
222 for (const auto& link : link_list) {
223 if (link.get_link()->get_sharing_policy() != s4u::Link::SharingPolicy::SPLITDUPLEX) {
224 links.push_back(link.get_link()->get_impl());
227 // split-duplex links
228 const auto* sd_link = dynamic_cast<const s4u::SplitDuplexLink*>(link.get_link());
230 "Add_route: cast to SpliDuplexLink impossible. This should not happen, please contact SimGrid team");
231 resource::StandardLinkImpl* link_impl;
232 switch (link.get_direction()) {
233 case s4u::LinkInRoute::Direction::UP:
235 link_impl = sd_link->get_link_down()->get_impl();
237 link_impl = sd_link->get_link_up()->get_impl();
239 case s4u::LinkInRoute::Direction::DOWN:
241 link_impl = sd_link->get_link_up()->get_impl();
243 link_impl = sd_link->get_link_down()->get_impl();
246 throw std::invalid_argument("Invalid add_route. Split-Duplex link without a direction: " +
247 link.get_link()->get_name());
249 links.push_back(link_impl);
254 void NetZoneImpl::add_route(NetPoint* /*src*/, NetPoint* /*dst*/, NetPoint* /*gw_src*/, NetPoint* /*gw_dst*/,
255 const std::vector<s4u::LinkInRoute>& /*link_list_*/, bool /*symmetrical*/)
257 xbt_die("NetZone '%s' does not accept new routes (wrong class).", get_cname());
260 void NetZoneImpl::add_bypass_route(NetPoint* src, NetPoint* dst, NetPoint* gw_src, NetPoint* gw_dst,
261 const std::vector<s4u::LinkInRoute>& link_list)
263 /* Argument validity checks */
265 XBT_DEBUG("Load bypassNetzoneRoute from %s@%s to %s@%s", src->get_cname(), gw_src->get_cname(), dst->get_cname(),
266 gw_dst->get_cname());
267 xbt_assert(not link_list.empty(), "Bypass route between %s@%s and %s@%s cannot be empty.", src->get_cname(),
268 gw_src->get_cname(), dst->get_cname(), gw_dst->get_cname());
269 xbt_assert(bypass_routes_.find({src, dst}) == bypass_routes_.end(),
270 "The bypass route between %s@%s and %s@%s already exists.", src->get_cname(), gw_src->get_cname(),
271 dst->get_cname(), gw_dst->get_cname());
273 XBT_DEBUG("Load bypassRoute from %s to %s", src->get_cname(), dst->get_cname());
274 xbt_assert(not link_list.empty(), "Bypass route between %s and %s cannot be empty.", src->get_cname(),
276 xbt_assert(bypass_routes_.find({src, dst}) == bypass_routes_.end(),
277 "The bypass route between %s and %s already exists.", src->get_cname(), dst->get_cname());
280 /* Build a copy that will be stored in the dict */
281 auto* newRoute = new BypassRoute(gw_src, gw_dst);
282 auto converted_list = get_link_list_impl(link_list, false);
283 newRoute->links.insert(newRoute->links.end(), begin(converted_list), end(converted_list));
286 bypass_routes_.insert({{src, dst}, newRoute});
289 /** @brief Get the common ancestor and its first children in each line leading to src and dst
291 * In the recursive case, this sets common_ancestor, src_ancestor and dst_ancestor are set as follows.
295 * ... <- possibly long path
300 * / \ <- direct links
303 * src_ancestor dst_ancestor <- must be different in the recursive case
305 * ... ... <-- possibly long paths (one hop or more)
310 * In the base case (when src and dst are in the same netzone), things are as follows:
314 * ... <-- possibly long path
316 * common_ancestor==src_ancestor==dst_ancestor <-- all the same value
318 * / \ <-- direct links (exactly one hop)
323 * A specific recursive case occurs when src is the ancestor of dst. In this case,
324 * the base case routing should be used so the common_ancestor is specifically set
325 * to src_ancestor==dst_ancestor.
326 * Naturally, things are completely symmetrical if dst is the ancestor of src.
330 * ... <-- possibly long path
332 * src == src_ancestor==dst_ancestor==common_ancestor <-- same value
334 * ... <-- possibly long path (one hop or more)
339 static void find_common_ancestors(const NetPoint* src, const NetPoint* dst,
340 /* OUT */ NetZoneImpl** common_ancestor, NetZoneImpl** src_ancestor,
341 NetZoneImpl** dst_ancestor)
343 /* Deal with the easy base case */
344 if (src->get_englobing_zone() == dst->get_englobing_zone()) {
345 *common_ancestor = src->get_englobing_zone();
346 *src_ancestor = *common_ancestor;
347 *dst_ancestor = *common_ancestor;
351 /* engage the full recursive search */
353 /* (1) find the path to root of src and dst*/
354 const NetZoneImpl* src_as = src->get_englobing_zone();
355 const NetZoneImpl* dst_as = dst->get_englobing_zone();
357 xbt_assert(src_as, "Host %s must be in a netzone", src->get_cname());
358 xbt_assert(dst_as, "Host %s must be in a netzone", dst->get_cname());
360 /* (2) find the path to the root routing component */
361 std::vector<NetZoneImpl*> path_src;
362 NetZoneImpl* current = src->get_englobing_zone();
363 while (current != nullptr) {
364 path_src.push_back(current);
365 current = current->get_parent();
367 std::vector<NetZoneImpl*> path_dst;
368 current = dst->get_englobing_zone();
369 while (current != nullptr) {
370 path_dst.push_back(current);
371 current = current->get_parent();
374 /* (3) find the common parent.
375 * Before that, index_src and index_dst may be different, they both point to nullptr in path_src/path_dst
376 * So we move them down simultaneously as long as they point to the same content.
378 * This works because all SimGrid platform have a unique root element (that is the last element of both paths).
380 NetZoneImpl* parent = nullptr; // the netzone we dropped on the previous loop iteration
381 while (path_src.size() > 1 && path_dst.size() > 1 && path_src.back() == path_dst.back()) {
382 parent = path_src.back();
387 /* (4) we found the difference at least. Finalize the returned values */
388 *src_ancestor = path_src.back(); /* the first different parent of src */
389 *dst_ancestor = path_dst.back(); /* the first different parent of dst */
390 if (*src_ancestor == *dst_ancestor) { // src is the ancestor of dst, or the contrary
391 *common_ancestor = *src_ancestor;
393 xbt_assert(parent != nullptr);
394 *common_ancestor = parent;
398 /* PRECONDITION: this is the common ancestor of src and dst */
399 bool NetZoneImpl::get_bypass_route(const NetPoint* src, const NetPoint* dst,
400 /* OUT */ std::vector<resource::StandardLinkImpl*>& links, double* latency,
401 std::unordered_set<NetZoneImpl*>& netzones)
403 // If never set a bypass route return nullptr without any further computations
404 if (bypass_routes_.empty())
407 /* Base case, no recursion is needed */
408 if (dst->get_englobing_zone() == this && src->get_englobing_zone() == this) {
409 if (bypass_routes_.find({src, dst}) != bypass_routes_.end()) {
410 const BypassRoute* bypassedRoute = bypass_routes_.at({src, dst});
411 add_link_latency(links, bypassedRoute->links, latency);
412 XBT_DEBUG("Found a bypass route from '%s' to '%s' with %zu links", src->get_cname(), dst->get_cname(),
413 bypassedRoute->links.size());
419 /* Engage recursive search */
421 /* (1) find the path to the root routing component */
422 std::vector<NetZoneImpl*> path_src;
423 NetZoneImpl* current = src->get_englobing_zone();
424 while (current != nullptr) {
425 path_src.push_back(current);
426 current = current->parent_;
429 std::vector<NetZoneImpl*> path_dst;
430 current = dst->get_englobing_zone();
431 while (current != nullptr) {
432 path_dst.push_back(current);
433 current = current->parent_;
436 /* (2) find the common parent */
437 while (path_src.size() > 1 && path_dst.size() > 1 && path_src.back() == path_dst.back()) {
442 /* (3) Search for a bypass making the path up to the ancestor useless */
443 const BypassRoute* bypassedRoute = nullptr;
444 std::pair<kernel::routing::NetPoint*, kernel::routing::NetPoint*> key;
445 // Search for a bypass with the given indices. Returns true if found. Initialize variables `bypassedRoute' and `key'.
446 auto lookup = [&bypassedRoute, &key, &path_src, &path_dst, this](unsigned src_index, unsigned dst_index) {
447 if (src_index < path_src.size() && dst_index < path_dst.size()) {
448 key = {path_src[src_index]->netpoint_, path_dst[dst_index]->netpoint_};
449 auto bpr = bypass_routes_.find(key);
450 if (bpr != bypass_routes_.end()) {
451 bypassedRoute = bpr->second;
458 for (unsigned max = 0, max_index = std::max(path_src.size(), path_dst.size()); max < max_index; max++) {
459 for (unsigned i = 0; i < max; i++) {
460 if (lookup(i, max) || lookup(max, i))
463 if (bypassedRoute || lookup(max, max))
467 /* (4) If we have the bypass, use it. If not, caller will do the Right Thing. */
469 XBT_DEBUG("Found a bypass route from '%s' to '%s' with %zu links. We may have to complete it with recursive "
471 src->get_cname(), dst->get_cname(), bypassedRoute->links.size());
472 if (src != key.first)
473 get_global_route_with_netzones(src, bypassedRoute->gw_src, links, latency, netzones);
474 add_link_latency(links, bypassedRoute->links, latency);
475 if (dst != key.second)
476 get_global_route_with_netzones(bypassedRoute->gw_dst, dst, links, latency, netzones);
479 XBT_DEBUG("No bypass route from '%s' to '%s'.", src->get_cname(), dst->get_cname());
483 void NetZoneImpl::get_global_route(const NetPoint* src, const NetPoint* dst,
484 /* OUT */ std::vector<resource::StandardLinkImpl*>& links, double* latency)
486 std::unordered_set<NetZoneImpl*> netzones;
487 get_global_route_with_netzones(src, dst, links, latency, netzones);
490 void NetZoneImpl::get_global_route_with_netzones(const NetPoint* src, const NetPoint* dst,
491 /* OUT */ std::vector<resource::StandardLinkImpl*>& links,
492 double* latency, std::unordered_set<NetZoneImpl*>& netzones)
496 XBT_DEBUG("Resolve route from '%s' to '%s'", src->get_cname(), dst->get_cname());
498 /* Find how src and dst are interconnected */
499 NetZoneImpl* common_ancestor;
500 NetZoneImpl* src_ancestor;
501 NetZoneImpl* dst_ancestor;
502 find_common_ancestors(src, dst, &common_ancestor, &src_ancestor, &dst_ancestor);
503 XBT_DEBUG("find_common_ancestors: common ancestor '%s' src ancestor '%s' dst ancestor '%s'",
504 common_ancestor->get_cname(), src_ancestor->get_cname(), dst_ancestor->get_cname());
506 netzones.insert(src->get_englobing_zone());
507 netzones.insert(dst->get_englobing_zone());
508 netzones.insert(common_ancestor);
509 /* Check whether a direct bypass is defined. If so, use it and bail out */
510 if (common_ancestor->get_bypass_route(src, dst, links, latency, netzones))
513 /* If src and dst are in the same netzone, life is good */
514 if (src_ancestor == dst_ancestor) { /* SURF_ROUTING_BASE */
515 route.link_list_ = std::move(links);
516 common_ancestor->get_local_route(src, dst, &route, latency);
517 links = std::move(route.link_list_);
521 /* Not in the same netzone, no bypass. We'll have to find our path between the netzones recursively */
522 common_ancestor->get_local_route(src_ancestor->netpoint_, dst_ancestor->netpoint_, &route, latency);
523 xbt_assert((route.gw_src_ != nullptr) && (route.gw_dst_ != nullptr), "Bad gateways for route from '%s' to '%s'.",
524 src->get_cname(), dst->get_cname());
526 /* If source gateway is not our source, we have to recursively find our way up to this point */
527 if (src != route.gw_src_)
528 get_global_route_with_netzones(src, route.gw_src_, links, latency, netzones);
529 links.insert(links.end(), begin(route.link_list_), end(route.link_list_));
531 /* If dest gateway is not our destination, we have to recursively find our way from this point */
532 if (route.gw_dst_ != dst)
533 get_global_route_with_netzones(route.gw_dst_, dst, links, latency, netzones);
536 void NetZoneImpl::seal()
538 /* already sealed netzone */
541 do_seal(); // derived class' specific sealing procedure
543 /* seals sub-netzones and hosts */
544 for (auto* host : get_all_hosts()) {
547 for (auto* sub_net : get_children()) {
551 s4u::NetZone::on_seal(piface_);
554 void NetZoneImpl::set_parent(NetZoneImpl* parent)
556 xbt_assert(not sealed_, "Impossible to set parent to an already sealed NetZone(%s)", this->get_cname());
558 netpoint_->set_englobing_zone(parent_);
560 /* adding this class as child */
561 parent->add_child(this);
562 /* copying models from parent host, to be reviewed when we allow multi-models */
563 set_network_model(parent->get_network_model());
564 set_cpu_pm_model(parent->get_cpu_pm_model());
565 set_cpu_vm_model(parent->get_cpu_vm_model());
566 set_disk_model(parent->get_disk_model());
567 set_host_model(parent->get_host_model());
571 void NetZoneImpl::set_network_model(std::shared_ptr<resource::NetworkModel> netmodel)
573 xbt_assert(not sealed_, "Impossible to set network model to an already sealed NetZone(%s)", this->get_cname());
574 network_model_ = std::move(netmodel);
577 void NetZoneImpl::set_cpu_vm_model(std::shared_ptr<resource::CpuModel> cpu_model)
579 xbt_assert(not sealed_, "Impossible to set CPU model to an already sealed NetZone(%s)", this->get_cname());
580 cpu_model_vm_ = std::move(cpu_model);
583 void NetZoneImpl::set_cpu_pm_model(std::shared_ptr<resource::CpuModel> cpu_model)
585 xbt_assert(not sealed_, "Impossible to set CPU model to an already sealed NetZone(%s)", this->get_cname());
586 cpu_model_pm_ = std::move(cpu_model);
589 void NetZoneImpl::set_disk_model(std::shared_ptr<resource::DiskModel> disk_model)
591 xbt_assert(not sealed_, "Impossible to set disk model to an already sealed NetZone(%s)", this->get_cname());
592 disk_model_ = std::move(disk_model);
595 void NetZoneImpl::set_host_model(std::shared_ptr<resource::HostModel> host_model)
597 xbt_assert(not sealed_, "Impossible to set host model to an already sealed NetZone(%s)", this->get_cname());
598 host_model_ = std::move(host_model);
601 const NetZoneImpl* NetZoneImpl::get_netzone_recursive(const NetPoint* netpoint) const
603 xbt_assert(netpoint && netpoint->is_netzone(), "Netpoint %s must be of the type NetZone",
604 netpoint ? netpoint->get_cname() : "nullptr");
606 if (netpoint == netpoint_)
609 for (const auto* children : children_) {
610 const NetZoneImpl* netzone = children->get_netzone_recursive(netpoint);
617 bool NetZoneImpl::is_component_recursive(const NetPoint* netpoint) const
619 /* check direct components */
620 if (std::any_of(begin(vertices_), end(vertices_), [netpoint](const auto* elem) { return elem == netpoint; }))
623 /* check childrens */
624 return std::any_of(begin(children_), end(children_),
625 [netpoint](const auto* child) { return child->is_component_recursive(netpoint); });
627 } // namespace routing
628 } // namespace kernel
629 } // namespace simgrid