1 /* Copyright (c) 2006-2021. 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/NetZoneImpl.hpp"
7 #include "simgrid/kernel/routing/NetPoint.hpp"
8 #include "simgrid/s4u/Engine.hpp"
9 #include "simgrid/s4u/Host.hpp"
10 #include "src/include/simgrid/sg_config.hpp"
11 #include "src/kernel/EngineImpl.hpp"
12 #include "src/kernel/resource/DiskImpl.hpp"
13 #include "src/surf/HostImpl.hpp"
14 #include "src/surf/cpu_interface.hpp"
15 #include "src/surf/network_interface.hpp"
16 #include "surf/surf.hpp"
18 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_route);
24 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
25 static void surf_config_models_setup()
27 std::string host_model_name = simgrid::config::get_value<std::string>("host/model");
28 std::string network_model_name = simgrid::config::get_value<std::string>("network/model");
29 std::string cpu_model_name = simgrid::config::get_value<std::string>("cpu/model");
30 std::string disk_model_name = simgrid::config::get_value<std::string>("disk/model");
32 /* The compound host model is needed when using non-default net/cpu models */
33 if ((not simgrid::config::is_default("network/model") || not simgrid::config::is_default("cpu/model")) &&
34 simgrid::config::is_default("host/model")) {
35 host_model_name = "compound";
36 simgrid::config::set_value("host/model", host_model_name);
39 XBT_DEBUG("host model: %s", host_model_name.c_str());
40 if (host_model_name == "compound") {
41 xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
42 xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
44 const auto* cpu_model = find_model_description(surf_cpu_model_description, cpu_model_name);
45 cpu_model->model_init_preparse();
47 const auto* network_model = find_model_description(surf_network_model_description, network_model_name);
48 network_model->model_init_preparse();
51 XBT_DEBUG("Call host_model_init");
52 const auto* host_model = find_model_description(surf_host_model_description, host_model_name);
53 host_model->model_init_preparse();
55 XBT_DEBUG("Call vm_model_init");
56 /* ideally we should get back the pointer to CpuModel from model_init_preparse(), but this
57 * requires changing the declaration of surf_cpu_model_description.
58 * To be reviewed in the future */
59 surf_vm_model_init_HL13(
60 simgrid::s4u::Engine::get_instance()->get_netzone_root()->get_impl()->get_cpu_pm_model().get());
62 XBT_DEBUG("Call disk_model_init");
63 const auto* disk_model = find_model_description(surf_disk_model_description, disk_model_name);
64 disk_model->model_init_preparse();
67 NetZoneImpl::NetZoneImpl(const std::string& name) : piface_(this), name_(name)
69 /* workaroud: first netzoneImpl will be the root netzone.
70 * Without globals and with current surf_*_model_description init functions, we need
71 * the root netzone to exist when creating the models.
72 * This was usually done at sg_platf.cpp, during XML parsing */
73 if (not s4u::Engine::get_instance()->get_netzone_root()) {
74 s4u::Engine::get_instance()->set_netzone_root(&piface_);
75 /* root netzone set, initialize models */
76 simgrid::s4u::Engine::on_platform_creation();
78 /* Initialize the surf models. That must be done after we got all config, and before we need the models.
79 * That is, after the last <config> tag, if any, and before the first of cluster|peer|zone|trace|trace_connect
81 * I'm not sure for <trace> and <trace_connect>, there may be a bug here
82 * (FIXME: check it out by creating a file beginning with one of these tags)
83 * but cluster and peer come down to zone creations, so putting this verification here is correct.
85 surf_config_models_setup();
88 xbt_assert(nullptr == s4u::Engine::get_instance()->netpoint_by_name_or_null(get_name()),
89 "Refusing to create a second NetZone called '%s'.", get_cname());
90 netpoint_ = new NetPoint(name_, NetPoint::Type::NetZone);
91 XBT_DEBUG("NetZone '%s' created with the id '%u'", get_cname(), netpoint_->id());
92 _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
93 * any further config now that we created some real content */
94 simgrid::s4u::NetZone::on_creation(piface_); // notify the signal
97 NetZoneImpl::~NetZoneImpl()
99 for (auto const& nz : children_)
102 for (auto const& kv : bypass_routes_)
105 s4u::Engine::get_instance()->netpoint_unregister(netpoint_);
108 void NetZoneImpl::add_child(NetZoneImpl* new_zone)
110 xbt_assert(not sealed_, "Cannot add a new child to the sealed zone %s", get_cname());
111 /* set the father behavior */
112 hierarchy_ = RoutingMode::recursive;
113 children_.push_back(new_zone);
116 /** @brief Returns the list of the hosts found in this NetZone (not recursively)
118 * Only the hosts that are directly contained in this NetZone are retrieved,
119 * not the ones contained in sub-netzones.
121 std::vector<s4u::Host*> NetZoneImpl::get_all_hosts() const
123 std::vector<s4u::Host*> res;
124 for (auto const& card : get_vertices()) {
125 s4u::Host* host = s4u::Host::by_name_or_null(card->get_name());
131 int NetZoneImpl::get_host_count() const
134 for (auto const& card : get_vertices()) {
135 const s4u::Host* host = s4u::Host::by_name_or_null(card->get_name());
142 s4u::Host* NetZoneImpl::create_host(const std::string& name, const std::vector<double>& speed_per_pstate)
144 auto* res = (new surf::HostImpl(name))->get_iface();
145 res->set_netpoint((new NetPoint(name, NetPoint::Type::Host))->set_englobing_zone(this));
147 cpu_model_pm_->create_cpu(res, speed_per_pstate);
152 s4u::Link* NetZoneImpl::create_link(const std::string& name, const std::vector<double>& bandwidths)
154 return network_model_->create_link(name, bandwidths)->get_iface();
157 s4u::Disk* NetZoneImpl::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
159 auto* l = disk_model_->create_disk(name, read_bandwidth, write_bandwidth);
161 return l->get_iface();
164 NetPoint* NetZoneImpl::create_router(const std::string& name)
166 xbt_assert(nullptr == s4u::Engine::get_instance()->netpoint_by_name_or_null(name),
167 "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
169 return (new NetPoint(name, NetPoint::Type::Router))->set_englobing_zone(this);
171 int NetZoneImpl::add_component(NetPoint* elm)
173 vertices_.push_back(elm);
174 return vertices_.size() - 1; // The rank of the newly created object
177 void NetZoneImpl::add_route(NetPoint* /*src*/, NetPoint* /*dst*/, NetPoint* /*gw_src*/, NetPoint* /*gw_dst*/,
178 const std::vector<resource::LinkImpl*>& /*link_list_*/, bool /*symmetrical*/)
180 xbt_die("NetZone '%s' does not accept new routes (wrong class).", get_cname());
183 void NetZoneImpl::add_bypass_route(NetPoint* src, NetPoint* dst, NetPoint* gw_src, NetPoint* gw_dst,
184 std::vector<resource::LinkImpl*>& link_list_, bool /* symmetrical */)
186 /* Argument validity checks */
188 XBT_DEBUG("Load bypassNetzoneRoute from %s@%s to %s@%s", src->get_cname(), gw_src->get_cname(), dst->get_cname(),
189 gw_dst->get_cname());
190 xbt_assert(not link_list_.empty(), "Bypass route between %s@%s and %s@%s cannot be empty.", src->get_cname(),
191 gw_src->get_cname(), dst->get_cname(), gw_dst->get_cname());
192 xbt_assert(bypass_routes_.find({src, dst}) == bypass_routes_.end(),
193 "The bypass route between %s@%s and %s@%s already exists.", src->get_cname(), gw_src->get_cname(),
194 dst->get_cname(), gw_dst->get_cname());
196 XBT_DEBUG("Load bypassRoute from %s to %s", src->get_cname(), dst->get_cname());
197 xbt_assert(not link_list_.empty(), "Bypass route between %s and %s cannot be empty.", src->get_cname(),
199 xbt_assert(bypass_routes_.find({src, dst}) == bypass_routes_.end(),
200 "The bypass route between %s and %s already exists.", src->get_cname(), dst->get_cname());
203 /* Build a copy that will be stored in the dict */
204 auto* newRoute = new BypassRoute(gw_src, gw_dst);
205 for (auto const& link : link_list_)
206 newRoute->links.push_back(link);
209 bypass_routes_.insert({{src, dst}, newRoute});
212 /** @brief Get the common ancestor and its first children in each line leading to src and dst
214 * In the recursive case, this sets common_ancestor, src_ancestor and dst_ancestor are set as follows.
218 * ... <- possibly long path
223 * / \ <- direct links
226 * src_ancestor dst_ancestor <- must be different in the recursive case
228 * ... ... <-- possibly long paths (one hop or more)
233 * In the base case (when src and dst are in the same netzone), things are as follows:
237 * ... <-- possibly long path
239 * common_ancestor==src_ancestor==dst_ancestor <-- all the same value
241 * / \ <-- direct links (exactly one hop)
246 * A specific recursive case occurs when src is the ancestor of dst. In this case,
247 * the base case routing should be used so the common_ancestor is specifically set
248 * to src_ancestor==dst_ancestor.
249 * Naturally, things are completely symmetrical if dst is the ancestor of src.
253 * ... <-- possibly long path
255 * src == src_ancestor==dst_ancestor==common_ancestor <-- same value
257 * ... <-- possibly long path (one hop or more)
262 static void find_common_ancestors(NetPoint* src, NetPoint* dst,
263 /* OUT */ NetZoneImpl** common_ancestor, NetZoneImpl** src_ancestor,
264 NetZoneImpl** dst_ancestor)
266 /* Deal with the easy base case */
267 if (src->get_englobing_zone() == dst->get_englobing_zone()) {
268 *common_ancestor = src->get_englobing_zone();
269 *src_ancestor = *common_ancestor;
270 *dst_ancestor = *common_ancestor;
274 /* engage the full recursive search */
276 /* (1) find the path to root of src and dst*/
277 const NetZoneImpl* src_as = src->get_englobing_zone();
278 const NetZoneImpl* dst_as = dst->get_englobing_zone();
280 xbt_assert(src_as, "Host %s must be in a netzone", src->get_cname());
281 xbt_assert(dst_as, "Host %s must be in a netzone", dst->get_cname());
283 /* (2) find the path to the root routing component */
284 std::vector<NetZoneImpl*> path_src;
285 NetZoneImpl* current = src->get_englobing_zone();
286 while (current != nullptr) {
287 path_src.push_back(current);
288 current = current->get_parent();
290 std::vector<NetZoneImpl*> path_dst;
291 current = dst->get_englobing_zone();
292 while (current != nullptr) {
293 path_dst.push_back(current);
294 current = current->get_parent();
297 /* (3) find the common father.
298 * Before that, index_src and index_dst may be different, they both point to nullptr in path_src/path_dst
299 * So we move them down simultaneously as long as they point to the same content.
301 * This works because all SimGrid platform have a unique root element (that is the last element of both paths).
303 NetZoneImpl* father = nullptr; // the netzone we dropped on the previous loop iteration
304 while (path_src.size() > 1 && path_dst.size() > 1 &&
305 path_src.at(path_src.size() - 1) == path_dst.at(path_dst.size() - 1)) {
306 father = path_src.at(path_src.size() - 1);
311 /* (4) we found the difference at least. Finalize the returned values */
312 *src_ancestor = path_src.at(path_src.size() - 1); /* the first different father of src */
313 *dst_ancestor = path_dst.at(path_dst.size() - 1); /* the first different father of dst */
314 if (*src_ancestor == *dst_ancestor) { // src is the ancestor of dst, or the contrary
315 *common_ancestor = *src_ancestor;
317 *common_ancestor = father;
321 /* PRECONDITION: this is the common ancestor of src and dst */
322 bool NetZoneImpl::get_bypass_route(NetPoint* src, NetPoint* dst,
323 /* OUT */ std::vector<resource::LinkImpl*>& links, double* latency)
325 // If never set a bypass route return nullptr without any further computations
326 if (bypass_routes_.empty())
329 /* Base case, no recursion is needed */
330 if (dst->get_englobing_zone() == this && src->get_englobing_zone() == this) {
331 if (bypass_routes_.find({src, dst}) != bypass_routes_.end()) {
332 const BypassRoute* bypassedRoute = bypass_routes_.at({src, dst});
333 for (resource::LinkImpl* const& link : bypassedRoute->links) {
334 links.push_back(link);
336 *latency += link->get_latency();
338 XBT_DEBUG("Found a bypass route from '%s' to '%s' with %zu links", src->get_cname(), dst->get_cname(),
339 bypassedRoute->links.size());
345 /* Engage recursive search */
347 /* (1) find the path to the root routing component */
348 std::vector<NetZoneImpl*> path_src;
349 NetZoneImpl* current = src->get_englobing_zone();
350 while (current != nullptr) {
351 path_src.push_back(current);
352 current = current->parent_;
355 std::vector<NetZoneImpl*> path_dst;
356 current = dst->get_englobing_zone();
357 while (current != nullptr) {
358 path_dst.push_back(current);
359 current = current->parent_;
362 /* (2) find the common father */
363 while (path_src.size() > 1 && path_dst.size() > 1 &&
364 path_src.at(path_src.size() - 1) == path_dst.at(path_dst.size() - 1)) {
369 /* (3) Search for a bypass making the path up to the ancestor useless */
370 const BypassRoute* bypassedRoute = nullptr;
371 std::pair<kernel::routing::NetPoint*, kernel::routing::NetPoint*> key;
372 // Search for a bypass with the given indices. Returns true if found. Initialize variables `bypassedRoute' and `key'.
373 auto lookup = [&bypassedRoute, &key, &path_src, &path_dst, this](unsigned src_index, unsigned dst_index) {
374 if (src_index < path_src.size() && dst_index < path_dst.size()) {
375 key = {path_src[src_index]->netpoint_, path_dst[dst_index]->netpoint_};
376 auto bpr = bypass_routes_.find(key);
377 if (bpr != bypass_routes_.end()) {
378 bypassedRoute = bpr->second;
385 for (unsigned max = 0, max_index = std::max(path_src.size(), path_dst.size()); max < max_index; max++) {
386 for (unsigned i = 0; i < max; i++) {
387 if (lookup(i, max) || lookup(max, i))
390 if (bypassedRoute || lookup(max, max))
394 /* (4) If we have the bypass, use it. If not, caller will do the Right Thing. */
396 XBT_DEBUG("Found a bypass route from '%s' to '%s' with %zu links. We may have to complete it with recursive "
398 src->get_cname(), dst->get_cname(), bypassedRoute->links.size());
399 if (src != key.first)
400 get_global_route(src, bypassedRoute->gw_src, links, latency);
401 for (resource::LinkImpl* const& link : bypassedRoute->links) {
402 links.push_back(link);
404 *latency += link->get_latency();
406 if (dst != key.second)
407 get_global_route(bypassedRoute->gw_dst, dst, links, latency);
410 XBT_DEBUG("No bypass route from '%s' to '%s'.", src->get_cname(), dst->get_cname());
414 void NetZoneImpl::get_global_route(NetPoint* src, NetPoint* dst,
415 /* OUT */ std::vector<resource::LinkImpl*>& links, double* latency)
419 XBT_DEBUG("Resolve route from '%s' to '%s'", src->get_cname(), dst->get_cname());
421 /* Find how src and dst are interconnected */
422 NetZoneImpl* common_ancestor;
423 NetZoneImpl* src_ancestor;
424 NetZoneImpl* dst_ancestor;
425 find_common_ancestors(src, dst, &common_ancestor, &src_ancestor, &dst_ancestor);
426 XBT_DEBUG("elements_father: common ancestor '%s' src ancestor '%s' dst ancestor '%s'", common_ancestor->get_cname(),
427 src_ancestor->get_cname(), dst_ancestor->get_cname());
429 /* Check whether a direct bypass is defined. If so, use it and bail out */
430 if (common_ancestor->get_bypass_route(src, dst, links, latency))
433 /* If src and dst are in the same netzone, life is good */
434 if (src_ancestor == dst_ancestor) { /* SURF_ROUTING_BASE */
435 route.link_list_ = std::move(links);
436 common_ancestor->get_local_route(src, dst, &route, latency);
437 links = std::move(route.link_list_);
441 /* Not in the same netzone, no bypass. We'll have to find our path between the netzones recursively */
443 common_ancestor->get_local_route(src_ancestor->netpoint_, dst_ancestor->netpoint_, &route, latency);
444 xbt_assert((route.gw_src_ != nullptr) && (route.gw_dst_ != nullptr), "Bad gateways for route from '%s' to '%s'.",
445 src->get_cname(), dst->get_cname());
447 /* If source gateway is not our source, we have to recursively find our way up to this point */
448 if (src != route.gw_src_)
449 get_global_route(src, route.gw_src_, links, latency);
450 links.insert(links.end(), begin(route.link_list_), end(route.link_list_));
452 /* If dest gateway is not our destination, we have to recursively find our way from this point */
453 if (route.gw_dst_ != dst)
454 get_global_route(route.gw_dst_, dst, links, latency);
457 void NetZoneImpl::seal()
459 /* already sealed netzone */
462 do_seal(); // derived class' specific sealing procedure
464 /* seals sub-netzones and hosts */
465 for (auto* host : get_all_hosts()) {
468 for (auto* sub_net : get_children()) {
472 s4u::NetZone::on_seal(piface_);
475 void NetZoneImpl::set_parent(NetZoneImpl* parent)
477 xbt_assert(not sealed_, "Impossible to set parent to an already sealed NetZone(%s)", this->get_cname());
479 netpoint_->set_englobing_zone(parent_);
481 /* adding this class as child */
482 parent->add_child(this);
483 /* copying models from parent host, to be reviewed when we allow multi-models */
484 set_network_model(parent->get_network_model());
485 set_cpu_pm_model(parent->get_cpu_pm_model());
486 set_cpu_vm_model(parent->get_cpu_vm_model());
487 set_disk_model(parent->get_disk_model());
488 set_host_model(parent->get_host_model());
492 void NetZoneImpl::set_network_model(std::shared_ptr<resource::NetworkModel> netmodel)
494 xbt_assert(not sealed_, "Impossible to set network model to an already sealed NetZone(%s)", this->get_cname());
495 network_model_ = std::move(netmodel);
498 void NetZoneImpl::set_cpu_vm_model(std::shared_ptr<resource::CpuModel> cpu_model)
500 xbt_assert(not sealed_, "Impossible to set CPU model to an already sealed NetZone(%s)", this->get_cname());
501 cpu_model_vm_ = std::move(cpu_model);
504 void NetZoneImpl::set_cpu_pm_model(std::shared_ptr<resource::CpuModel> cpu_model)
506 xbt_assert(not sealed_, "Impossible to set CPU model to an already sealed NetZone(%s)", this->get_cname());
507 cpu_model_pm_ = std::move(cpu_model);
510 void NetZoneImpl::set_disk_model(std::shared_ptr<resource::DiskModel> disk_model)
512 xbt_assert(not sealed_, "Impossible to set disk model to an already sealed NetZone(%s)", this->get_cname());
513 disk_model_ = std::move(disk_model);
516 void NetZoneImpl::set_host_model(std::shared_ptr<surf::HostModel> host_model)
518 xbt_assert(not sealed_, "Impossible to set host model to an already sealed NetZone(%s)", this->get_cname());
519 host_model_ = std::move(host_model);
522 } // namespace routing
523 } // namespace kernel
524 } // namespace simgrid