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 "src/surf/xml/platf_private.hpp"
17 #include "surf/surf.hpp"
19 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_route);
25 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
26 static void surf_config_models_setup()
28 std::string host_model_name = simgrid::config::get_value<std::string>("host/model");
29 std::string network_model_name = simgrid::config::get_value<std::string>("network/model");
30 std::string cpu_model_name = simgrid::config::get_value<std::string>("cpu/model");
31 std::string disk_model_name = simgrid::config::get_value<std::string>("disk/model");
33 /* The compound host model is needed when using non-default net/cpu models */
34 if ((not simgrid::config::is_default("network/model") || not simgrid::config::is_default("cpu/model")) &&
35 simgrid::config::is_default("host/model")) {
36 host_model_name = "compound";
37 simgrid::config::set_value("host/model", host_model_name);
40 XBT_DEBUG("host model: %s", host_model_name.c_str());
41 if (host_model_name == "compound") {
42 xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
43 xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
45 int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
46 surf_cpu_model_description[cpu_id].model_init_preparse();
48 int network_id = find_model_description(surf_network_model_description, network_model_name);
49 surf_network_model_description[network_id].model_init_preparse();
52 XBT_DEBUG("Call host_model_init");
53 int host_id = find_model_description(surf_host_model_description, host_model_name);
54 surf_host_model_description[host_id].model_init_preparse();
56 XBT_DEBUG("Call vm_model_init");
57 /* ideally we should get back the pointer to CpuModel from model_init_preparse(), but this
58 * requires changing the declaration of surf_cpu_model_description.
59 * To be reviewed in the future */
60 surf_vm_model_init_HL13(
61 simgrid::s4u::Engine::get_instance()->get_netzone_root()->get_impl()->get_cpu_pm_model().get());
63 XBT_DEBUG("Call disk_model_init");
64 int disk_id = find_model_description(surf_disk_model_description, disk_model_name);
65 surf_disk_model_description[disk_id].model_init_preparse();
68 NetZoneImpl::NetZoneImpl(const std::string& name) : piface_(this), name_(name)
70 /* workaroud: first netzoneImpl will be the root netzone.
71 * Without globals and with current surf_*_model_description init functions, we need
72 * the root netzone to exist when creating the models.
73 * This was usually done at sg_platf.cpp, during XML parsing */
74 if (not s4u::Engine::get_instance()->get_netzone_root())
75 s4u::Engine::get_instance()->set_netzone_root(&piface_);
77 static bool surf_parse_models_setup_already_called = false;
78 if (not surf_parse_models_setup_already_called) {
79 simgrid::s4u::Engine::on_platform_creation();
81 /* Initialize the surf models. That must be done after we got all config, and before we need the models.
82 * That is, after the last <config> tag, if any, and before the first of cluster|peer|zone|trace|trace_connect
84 * I'm not sure for <trace> and <trace_connect>, there may be a bug here
85 * (FIXME: check it out by creating a file beginning with one of these tags)
86 * but cluster and peer come down to zone creations, so putting this verification here is correct.
88 surf_parse_models_setup_already_called = true;
89 surf_config_models_setup();
92 xbt_assert(nullptr == s4u::Engine::get_instance()->netpoint_by_name_or_null(get_name()),
93 "Refusing to create a second NetZone called '%s'.", get_cname());
94 netpoint_ = new NetPoint(name_, NetPoint::Type::NetZone);
95 XBT_DEBUG("NetZone '%s' created with the id '%u'", get_cname(), netpoint_->id());
98 NetZoneImpl::~NetZoneImpl()
100 for (auto const& nz : children_)
103 for (auto const& kv : bypass_routes_)
106 s4u::Engine::get_instance()->netpoint_unregister(netpoint_);
109 void NetZoneImpl::add_child(NetZoneImpl* new_zone)
111 xbt_assert(not sealed_, "Cannot add a new child to the sealed zone %s", get_cname());
112 /* set the father behavior */
113 hierarchy_ = RoutingMode::recursive;
114 children_.push_back(new_zone);
117 /** @brief Returns the list of the hosts found in this NetZone (not recursively)
119 * Only the hosts that are directly contained in this NetZone are retrieved,
120 * not the ones contained in sub-netzones.
122 std::vector<s4u::Host*> NetZoneImpl::get_all_hosts() const
124 std::vector<s4u::Host*> res;
125 for (auto const& card : get_vertices()) {
126 s4u::Host* host = s4u::Host::by_name_or_null(card->get_name());
132 int NetZoneImpl::get_host_count() const
135 for (auto const& card : get_vertices()) {
136 const s4u::Host* host = s4u::Host::by_name_or_null(card->get_name());
143 s4u::Host* NetZoneImpl::create_host(const std::string& name, const std::vector<double>& speed_per_pstate)
145 auto* res = (new surf::HostImpl(name))->get_iface();
146 res->set_netpoint((new NetPoint(name, NetPoint::Type::Host))->set_englobing_zone(this));
148 cpu_model_pm_->create_cpu(res, speed_per_pstate);
153 s4u::Link* NetZoneImpl::create_link(const std::string& name, const std::vector<double>& bandwidths)
155 return network_model_->create_link(name, bandwidths)->get_iface();
158 s4u::Disk* NetZoneImpl::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
160 auto* l = disk_model_->create_disk(name, read_bandwidth, write_bandwidth);
162 return l->get_iface();
165 NetPoint* NetZoneImpl::create_router(const std::string& name)
167 xbt_assert(nullptr == s4u::Engine::get_instance()->netpoint_by_name_or_null(name),
168 "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
170 return (new NetPoint(name, NetPoint::Type::Router))->set_englobing_zone(this);
172 int NetZoneImpl::add_component(NetPoint* elm)
174 vertices_.push_back(elm);
175 return vertices_.size() - 1; // The rank of the newly created object
178 void NetZoneImpl::add_route(NetPoint* /*src*/, NetPoint* /*dst*/, NetPoint* /*gw_src*/, NetPoint* /*gw_dst*/,
179 const std::vector<resource::LinkImpl*>& /*link_list*/, bool /*symmetrical*/)
181 xbt_die("NetZone '%s' does not accept new routes (wrong class).", get_cname());
184 void NetZoneImpl::add_bypass_route(NetPoint* src, NetPoint* dst, NetPoint* gw_src, NetPoint* gw_dst,
185 std::vector<resource::LinkImpl*>& link_list, bool /* symmetrical */)
187 /* Argument validity checks */
189 XBT_DEBUG("Load bypassNetzoneRoute from %s@%s to %s@%s", src->get_cname(), gw_src->get_cname(), dst->get_cname(),
190 gw_dst->get_cname());
191 xbt_assert(not link_list.empty(), "Bypass route between %s@%s and %s@%s cannot be empty.", src->get_cname(),
192 gw_src->get_cname(), dst->get_cname(), gw_dst->get_cname());
193 xbt_assert(bypass_routes_.find({src, dst}) == bypass_routes_.end(),
194 "The bypass route between %s@%s and %s@%s already exists.", src->get_cname(), gw_src->get_cname(),
195 dst->get_cname(), gw_dst->get_cname());
197 XBT_DEBUG("Load bypassRoute from %s to %s", src->get_cname(), dst->get_cname());
198 xbt_assert(not link_list.empty(), "Bypass route between %s and %s cannot be empty.", src->get_cname(),
200 xbt_assert(bypass_routes_.find({src, dst}) == bypass_routes_.end(),
201 "The bypass route between %s and %s already exists.", src->get_cname(), dst->get_cname());
204 /* Build a copy that will be stored in the dict */
205 auto* newRoute = new BypassRoute(gw_src, gw_dst);
206 for (auto const& link : link_list)
207 newRoute->links.push_back(link);
210 bypass_routes_.insert({{src, dst}, newRoute});
213 /** @brief Get the common ancestor and its first children in each line leading to src and dst
215 * In the recursive case, this sets common_ancestor, src_ancestor and dst_ancestor are set as follows.
219 * ... <- possibly long path
224 * / \ <- direct links
227 * src_ancestor dst_ancestor <- must be different in the recursive case
229 * ... ... <-- possibly long paths (one hop or more)
234 * In the base case (when src and dst are in the same netzone), things are as follows:
238 * ... <-- possibly long path
240 * common_ancestor==src_ancestor==dst_ancestor <-- all the same value
242 * / \ <-- direct links (exactly one hop)
247 * A specific recursive case occurs when src is the ancestor of dst. In this case,
248 * the base case routing should be used so the common_ancestor is specifically set
249 * to src_ancestor==dst_ancestor.
250 * Naturally, things are completely symmetrical if dst is the ancestor of src.
254 * ... <-- possibly long path
256 * src == src_ancestor==dst_ancestor==common_ancestor <-- same value
258 * ... <-- possibly long path (one hop or more)
263 static void find_common_ancestors(NetPoint* src, NetPoint* dst,
264 /* OUT */ NetZoneImpl** common_ancestor, NetZoneImpl** src_ancestor,
265 NetZoneImpl** dst_ancestor)
267 /* Deal with the easy base case */
268 if (src->get_englobing_zone() == dst->get_englobing_zone()) {
269 *common_ancestor = src->get_englobing_zone();
270 *src_ancestor = *common_ancestor;
271 *dst_ancestor = *common_ancestor;
275 /* engage the full recursive search */
277 /* (1) find the path to root of src and dst*/
278 const NetZoneImpl* src_as = src->get_englobing_zone();
279 const NetZoneImpl* dst_as = dst->get_englobing_zone();
281 xbt_assert(src_as, "Host %s must be in a netzone", src->get_cname());
282 xbt_assert(dst_as, "Host %s must be in a netzone", dst->get_cname());
284 /* (2) find the path to the root routing component */
285 std::vector<NetZoneImpl*> path_src;
286 NetZoneImpl* current = src->get_englobing_zone();
287 while (current != nullptr) {
288 path_src.push_back(current);
289 current = current->get_parent();
291 std::vector<NetZoneImpl*> path_dst;
292 current = dst->get_englobing_zone();
293 while (current != nullptr) {
294 path_dst.push_back(current);
295 current = current->get_parent();
298 /* (3) find the common father.
299 * Before that, index_src and index_dst may be different, they both point to nullptr in path_src/path_dst
300 * So we move them down simultaneously as long as they point to the same content.
302 * This works because all SimGrid platform have a unique root element (that is the last element of both paths).
304 NetZoneImpl* father = nullptr; // the netzone we dropped on the previous loop iteration
305 while (path_src.size() > 1 && path_dst.size() > 1 &&
306 path_src.at(path_src.size() - 1) == path_dst.at(path_dst.size() - 1)) {
307 father = path_src.at(path_src.size() - 1);
312 /* (4) we found the difference at least. Finalize the returned values */
313 *src_ancestor = path_src.at(path_src.size() - 1); /* the first different father of src */
314 *dst_ancestor = path_dst.at(path_dst.size() - 1); /* the first different father of dst */
315 if (*src_ancestor == *dst_ancestor) { // src is the ancestor of dst, or the contrary
316 *common_ancestor = *src_ancestor;
318 *common_ancestor = father;
322 /* PRECONDITION: this is the common ancestor of src and dst */
323 bool NetZoneImpl::get_bypass_route(NetPoint* src, NetPoint* dst,
324 /* OUT */ std::vector<resource::LinkImpl*>& links, double* latency)
326 // If never set a bypass route return nullptr without any further computations
327 if (bypass_routes_.empty())
330 /* Base case, no recursion is needed */
331 if (dst->get_englobing_zone() == this && src->get_englobing_zone() == this) {
332 if (bypass_routes_.find({src, dst}) != bypass_routes_.end()) {
333 const BypassRoute* bypassedRoute = bypass_routes_.at({src, dst});
334 for (resource::LinkImpl* const& link : bypassedRoute->links) {
335 links.push_back(link);
337 *latency += link->get_latency();
339 XBT_DEBUG("Found a bypass route from '%s' to '%s' with %zu links", src->get_cname(), dst->get_cname(),
340 bypassedRoute->links.size());
346 /* Engage recursive search */
348 /* (1) find the path to the root routing component */
349 std::vector<NetZoneImpl*> path_src;
350 NetZoneImpl* current = src->get_englobing_zone();
351 while (current != nullptr) {
352 path_src.push_back(current);
353 current = current->parent_;
356 std::vector<NetZoneImpl*> path_dst;
357 current = dst->get_englobing_zone();
358 while (current != nullptr) {
359 path_dst.push_back(current);
360 current = current->parent_;
363 /* (2) find the common father */
364 while (path_src.size() > 1 && path_dst.size() > 1 &&
365 path_src.at(path_src.size() - 1) == path_dst.at(path_dst.size() - 1)) {
370 /* (3) Search for a bypass making the path up to the ancestor useless */
371 const BypassRoute* bypassedRoute = nullptr;
372 std::pair<kernel::routing::NetPoint*, kernel::routing::NetPoint*> key;
373 // Search for a bypass with the given indices. Returns true if found. Initialize variables `bypassedRoute' and `key'.
374 auto lookup = [&bypassedRoute, &key, &path_src, &path_dst, this](unsigned src_index, unsigned dst_index) {
375 if (src_index < path_src.size() && dst_index <= path_dst.size()) {
376 key = {path_src[src_index]->netpoint_, path_dst[dst_index]->netpoint_};
377 auto bpr = bypass_routes_.find(key);
378 if (bpr != bypass_routes_.end()) {
379 bypassedRoute = bpr->second;
386 for (unsigned max = 0, max_index = std::max(path_src.size(), path_dst.size()); max < max_index; max++) {
387 for (unsigned i = 0; i < max; i++) {
388 if (lookup(i, max) || lookup(max, i))
391 if (bypassedRoute || lookup(max, max))
395 /* (4) If we have the bypass, use it. If not, caller will do the Right Thing. */
397 XBT_DEBUG("Found a bypass route from '%s' to '%s' with %zu links. We may have to complete it with recursive "
399 src->get_cname(), dst->get_cname(), bypassedRoute->links.size());
400 if (src != key.first)
401 get_global_route(src, bypassedRoute->gw_src, links, latency);
402 for (resource::LinkImpl* const& link : bypassedRoute->links) {
403 links.push_back(link);
405 *latency += link->get_latency();
407 if (dst != key.second)
408 get_global_route(bypassedRoute->gw_dst, dst, links, latency);
411 XBT_DEBUG("No bypass route from '%s' to '%s'.", src->get_cname(), dst->get_cname());
415 void NetZoneImpl::get_global_route(NetPoint* src, NetPoint* dst,
416 /* OUT */ std::vector<resource::LinkImpl*>& links, double* latency)
418 RouteCreationArgs route;
420 XBT_DEBUG("Resolve route from '%s' to '%s'", src->get_cname(), dst->get_cname());
422 /* Find how src and dst are interconnected */
423 NetZoneImpl* common_ancestor;
424 NetZoneImpl* src_ancestor;
425 NetZoneImpl* dst_ancestor;
426 find_common_ancestors(src, dst, &common_ancestor, &src_ancestor, &dst_ancestor);
427 XBT_DEBUG("elements_father: common ancestor '%s' src ancestor '%s' dst ancestor '%s'", common_ancestor->get_cname(),
428 src_ancestor->get_cname(), dst_ancestor->get_cname());
430 /* Check whether a direct bypass is defined. If so, use it and bail out */
431 if (common_ancestor->get_bypass_route(src, dst, links, latency))
434 /* If src and dst are in the same netzone, life is good */
435 if (src_ancestor == dst_ancestor) { /* SURF_ROUTING_BASE */
436 route.link_list = std::move(links);
437 common_ancestor->get_local_route(src, dst, &route, latency);
438 links = std::move(route.link_list);
442 /* Not in the same netzone, no bypass. We'll have to find our path between the netzones recursively */
444 common_ancestor->get_local_route(src_ancestor->netpoint_, dst_ancestor->netpoint_, &route, latency);
445 xbt_assert((route.gw_src != nullptr) && (route.gw_dst != nullptr), "Bad gateways for route from '%s' to '%s'.",
446 src->get_cname(), dst->get_cname());
448 /* If source gateway is not our source, we have to recursively find our way up to this point */
449 if (src != route.gw_src)
450 get_global_route(src, route.gw_src, links, latency);
451 for (auto const& link : route.link_list)
452 links.push_back(link);
454 /* If dest gateway is not our destination, we have to recursively find our way from this point */
455 if (route.gw_dst != dst)
456 get_global_route(route.gw_dst, dst, links, latency);
459 void NetZoneImpl::seal()
461 /* already sealed netzone */
464 do_seal(); // derived class' specific sealing procedure
466 /* seals sub-netzones and hosts */
467 for (auto* host : get_all_hosts()) {
470 for (auto* sub_net : get_children()) {
476 void NetZoneImpl::set_parent(NetZoneImpl* parent)
478 xbt_assert(not sealed_, "Impossible to set parent to an already sealed NetZone(%s)", this->get_cname());
480 netpoint_->set_englobing_zone(parent_);
482 /* adding this class as child */
483 parent->add_child(this);
484 /* copying models from parent host, to be reviewed when we allow multi-models */
485 set_network_model(parent->get_network_model());
486 set_cpu_pm_model(parent->get_cpu_pm_model());
487 set_cpu_vm_model(parent->get_cpu_vm_model());
488 set_disk_model(parent->get_disk_model());
489 set_host_model(parent->get_host_model());
493 void NetZoneImpl::set_network_model(std::shared_ptr<resource::NetworkModel> netmodel)
495 xbt_assert(not sealed_, "Impossible to set network model to an already sealed NetZone(%s)", this->get_cname());
496 network_model_ = std::move(netmodel);
499 void NetZoneImpl::set_cpu_vm_model(std::shared_ptr<resource::CpuModel> cpu_model)
501 xbt_assert(not sealed_, "Impossible to set CPU model to an already sealed NetZone(%s)", this->get_cname());
502 cpu_model_vm_ = std::move(cpu_model);
505 void NetZoneImpl::set_cpu_pm_model(std::shared_ptr<resource::CpuModel> cpu_model)
507 xbt_assert(not sealed_, "Impossible to set CPU model to an already sealed NetZone(%s)", this->get_cname());
508 cpu_model_pm_ = std::move(cpu_model);
511 void NetZoneImpl::set_disk_model(std::shared_ptr<resource::DiskModel> disk_model)
513 xbt_assert(not sealed_, "Impossible to set disk model to an already sealed NetZone(%s)", this->get_cname());
514 disk_model_ = std::move(disk_model);
517 void NetZoneImpl::set_host_model(std::shared_ptr<surf::HostModel> host_model)
519 xbt_assert(not sealed_, "Impossible to set host model to an already sealed NetZone(%s)", this->get_cname());
520 host_model_ = std::move(host_model);
523 } // namespace routing
524 } // namespace kernel
525 } // namespace simgrid