1 /* Copyright (c) 2014-2018. 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/DragonflyZone.hpp"
7 #include "simgrid/kernel/routing/NetPoint.hpp"
8 #include "src/surf/network_interface.hpp"
9 #include "src/surf/xml/platf_private.hpp"
11 #include <boost/algorithm/string/classification.hpp>
12 #include <boost/algorithm/string/split.hpp>
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_cluster_dragonfly, surf_route_cluster, "Dragonfly Routing part of surf");
21 DragonflyZone::DragonflyZone(NetZone* father, std::string name) : ClusterZone(father, name)
25 DragonflyZone::~DragonflyZone()
27 if (this->routers_ != nullptr) {
28 for (unsigned int i = 0; i < this->num_groups_ * this->num_chassis_per_group_ * this->num_blades_per_chassis_; i++)
34 void DragonflyZone::rankId_to_coords(int rankId, unsigned int (*coords)[4])
36 // coords : group, chassis, blade, node
37 (*coords)[0] = rankId / (num_chassis_per_group_ * num_blades_per_chassis_ * num_nodes_per_blade_);
38 rankId = rankId % (num_chassis_per_group_ * num_blades_per_chassis_ * num_nodes_per_blade_);
39 (*coords)[1] = rankId / (num_blades_per_chassis_ * num_nodes_per_blade_);
40 rankId = rankId % (num_blades_per_chassis_ * num_nodes_per_blade_);
41 (*coords)[2] = rankId / num_nodes_per_blade_;
42 (*coords)[3] = rankId % num_nodes_per_blade_;
45 void DragonflyZone::parse_specific_arguments(ClusterCreationArgs* cluster)
47 std::vector<std::string> parameters;
48 std::vector<std::string> tmp;
49 boost::split(parameters, cluster->topo_parameters, boost::is_any_of(";"));
51 if (parameters.size() != 4 || parameters.empty()) {
53 "Dragonfly are defined by the number of groups, chassis per groups, blades per chassis, nodes per blade");
56 // Blue network : number of groups, number of links between each group
57 boost::split(tmp, parameters[0], boost::is_any_of(","));
58 if (tmp.size() != 2) {
59 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
63 this->num_groups_ = std::stoi(tmp[0]);
64 } catch (std::invalid_argument& ia) {
65 throw std::invalid_argument(std::string("Invalid number of groups:") + tmp[0]);
69 this->num_links_blue_ = std::stoi(tmp[1]);
70 } catch (std::invalid_argument& ia) {
71 throw std::invalid_argument(std::string("Invalid number of links for the blue level:") + tmp[1]);
73 // Black network : number of chassis/group, number of links between each router on the black network
74 boost::split(tmp, parameters[1], boost::is_any_of(","));
75 if (tmp.size() != 2) {
76 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
80 this->num_chassis_per_group_ = std::stoi(tmp[0]);
81 } catch (std::invalid_argument& ia) {
82 throw std::invalid_argument(std::string("Invalid number of groups:") + tmp[0]);
86 this->num_links_black_ = std::stoi(tmp[1]);
87 } catch (std::invalid_argument& ia) {
88 throw std::invalid_argument(std::string("Invalid number of links for the black level:") + tmp[1]);
91 // Green network : number of blades/chassis, number of links between each router on the green network
92 boost::split(tmp, parameters[2], boost::is_any_of(","));
93 if (tmp.size() != 2) {
94 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
98 this->num_blades_per_chassis_ = std::stoi(tmp[0]);
99 } catch (std::invalid_argument& ia) {
100 throw std::invalid_argument(std::string("Invalid number of groups:") + tmp[0]);
104 this->num_links_green_ = std::stoi(tmp[1]);
105 } catch (std::invalid_argument& ia) {
106 throw std::invalid_argument(std::string("Invalid number of links for the green level:") + tmp[1]);
109 // The last part of topo_parameters should be the number of nodes per blade
111 this->num_nodes_per_blade_ = std::stoi(parameters[3]);
112 } catch (std::invalid_argument& ia) {
113 throw std::invalid_argument(std::string("Last parameter is not the amount of nodes per blade:") + parameters[3]);
116 if (cluster->sharing_policy == SURF_LINK_SPLITDUPLEX)
117 this->num_links_per_link_ = 2;
119 this->cluster_ = cluster;
122 /* Generate the cluster once every node is created */
123 void DragonflyZone::seal()
125 if (this->num_nodes_per_blade_ == 0) {
129 this->generateRouters();
130 this->generateLinks();
133 DragonflyRouter::DragonflyRouter(int group, int chassis, int blade) : group_(group), chassis_(chassis), blade_(blade)
137 DragonflyRouter::~DragonflyRouter()
140 delete[] green_links_;
141 delete[] black_links_;
145 void DragonflyZone::generateRouters()
148 new DragonflyRouter*[this->num_groups_ * this->num_chassis_per_group_ * this->num_blades_per_chassis_];
150 for (unsigned int i = 0; i < this->num_groups_; i++) {
151 for (unsigned int j = 0; j < this->num_chassis_per_group_; j++) {
152 for (unsigned int k = 0; k < this->num_blades_per_chassis_; k++) {
153 DragonflyRouter* router = new DragonflyRouter(i, j, k);
154 this->routers_[i * this->num_chassis_per_group_ * this->num_blades_per_chassis_ +
155 j * this->num_blades_per_chassis_ + k] = router;
161 void DragonflyZone::createLink(const std::string& id, int numlinks, surf::LinkImpl** linkup, surf::LinkImpl** linkdown)
165 LinkCreationArgs linkTemplate;
166 linkTemplate.bandwidth = this->cluster_->bw * numlinks;
167 linkTemplate.latency = this->cluster_->lat;
168 linkTemplate.policy = this->cluster_->sharing_policy; // sthg to do with that ?
169 linkTemplate.id = id;
170 sg_platf_new_link(&linkTemplate);
171 XBT_DEBUG("Generating link %s", id.c_str());
172 surf::LinkImpl* link;
173 if (this->cluster_->sharing_policy == SURF_LINK_SPLITDUPLEX) {
174 *linkup = surf::LinkImpl::byName(linkTemplate.id + "_UP"); // check link?
175 *linkdown = surf::LinkImpl::byName(linkTemplate.id + "_DOWN"); // check link ?
177 link = surf::LinkImpl::byName(linkTemplate.id);
183 void DragonflyZone::generateLinks()
185 static int uniqueId = 0;
186 surf::LinkImpl* linkup;
187 surf::LinkImpl* linkdown;
189 unsigned int numRouters = this->num_groups_ * this->num_chassis_per_group_ * this->num_blades_per_chassis_;
191 // Links from routers to their local nodes.
192 for (unsigned int i = 0; i < numRouters; i++) {
193 // allocate structures
194 this->routers_[i]->my_nodes_ = new surf::LinkImpl*[num_links_per_link_ * this->num_nodes_per_blade_];
195 this->routers_[i]->green_links_ = new surf::LinkImpl*[this->num_blades_per_chassis_];
196 this->routers_[i]->black_links_ = new surf::LinkImpl*[this->num_chassis_per_group_];
198 for (unsigned int j = 0; j < num_links_per_link_ * this->num_nodes_per_blade_; j += num_links_per_link_) {
199 std::string id = "local_link_from_router_" + std::to_string(i) + "_to_node_" +
200 std::to_string(j / num_links_per_link_) + "_" + std::to_string(uniqueId);
201 this->createLink(id, 1, &linkup, &linkdown);
203 this->routers_[i]->my_nodes_[j] = linkup;
204 if (this->cluster_->sharing_policy == SURF_LINK_SPLITDUPLEX)
205 this->routers_[i]->my_nodes_[j + 1] = linkdown;
211 // Green links from routers to same chassis routers - alltoall
212 for (unsigned int i = 0; i < this->num_groups_ * this->num_chassis_per_group_; i++) {
213 for (unsigned int j = 0; j < this->num_blades_per_chassis_; j++) {
214 for (unsigned int k = j + 1; k < this->num_blades_per_chassis_; k++) {
215 std::string id = "green_link_in_chassis_" + std::to_string(i % num_chassis_per_group_) + "_between_routers_" +
216 std::to_string(j) + "_and_" + std::to_string(k) + "_" + std::to_string(uniqueId);
217 this->createLink(id, this->num_links_green_, &linkup, &linkdown);
219 this->routers_[i * num_blades_per_chassis_ + j]->green_links_[k] = linkup;
220 this->routers_[i * num_blades_per_chassis_ + k]->green_links_[j] = linkdown;
226 // Black links from routers to same group routers - alltoall
227 for (unsigned int i = 0; i < this->num_groups_; i++) {
228 for (unsigned int j = 0; j < this->num_chassis_per_group_; j++) {
229 for (unsigned int k = j + 1; k < this->num_chassis_per_group_; k++) {
230 for (unsigned int l = 0; l < this->num_blades_per_chassis_; l++) {
231 std::string id = "black_link_in_group_" + std::to_string(i) + "_between_chassis_" + std::to_string(j) +
232 "_and_" + std::to_string(k) +"_blade_" + std::to_string(l) + "_" + std::to_string(uniqueId);
233 this->createLink(id, this->num_links_black_, &linkup, &linkdown);
235 this->routers_[i * num_blades_per_chassis_ * num_chassis_per_group_ + j * num_blades_per_chassis_ + l]
236 ->black_links_[k] = linkup;
237 this->routers_[i * num_blades_per_chassis_ * num_chassis_per_group_ + k * num_blades_per_chassis_ + l]
238 ->black_links_[j] = linkdown;
245 // Blue links between groups - Not all routers involved, only one per group is linked to others. Let's say router n of
246 // each group is linked to group n.
247 // FIXME: in reality blue links may be attached to several different routers
248 for (unsigned int i = 0; i < this->num_groups_; i++) {
249 for (unsigned int j = i + 1; j < this->num_groups_; j++) {
250 unsigned int routernumi = i * num_blades_per_chassis_ * num_chassis_per_group_ + j;
251 unsigned int routernumj = j * num_blades_per_chassis_ * num_chassis_per_group_ + i;
252 this->routers_[routernumi]->blue_links_ = new surf::LinkImpl*;
253 this->routers_[routernumj]->blue_links_ = new surf::LinkImpl*;
254 std::string id = "blue_link_between_group_"+ std::to_string(i) +"_and_" + std::to_string(j) +"_routers_" +
255 std::to_string(routernumi) + "_and_" + std::to_string(routernumj) + "_" + std::to_string(uniqueId);
256 this->createLink(id, this->num_links_blue_, &linkup, &linkdown);
258 this->routers_[routernumi]->blue_links_[0] = linkup;
259 this->routers_[routernumj]->blue_links_[0] = linkdown;
265 void DragonflyZone::getLocalRoute(NetPoint* src, NetPoint* dst, RouteCreationArgs* route, double* latency)
267 // Minimal routing version.
268 // TODO : non-minimal random one, and adaptive ?
270 if (dst->isRouter() || src->isRouter())
273 XBT_VERB("dragonfly getLocalRoute from '%s'[%u] to '%s'[%u]", src->get_cname(), src->id(), dst->get_cname(),
276 if ((src->id() == dst->id()) && has_loopback_) {
277 std::pair<surf::LinkImpl*, surf::LinkImpl*> info = private_links_.at(nodePosition(src->id()));
279 route->link_list.push_back(info.first);
281 *latency += info.first->latency();
285 unsigned int myCoords[4];
286 rankId_to_coords(src->id(), &myCoords);
287 unsigned int targetCoords[4];
288 rankId_to_coords(dst->id(), &targetCoords);
289 XBT_DEBUG("src : %u group, %u chassis, %u blade, %u node", myCoords[0], myCoords[1], myCoords[2], myCoords[3]);
290 XBT_DEBUG("dst : %u group, %u chassis, %u blade, %u node", targetCoords[0], targetCoords[1], targetCoords[2],
293 DragonflyRouter* myRouter = routers_[myCoords[0] * (num_chassis_per_group_ * num_blades_per_chassis_) +
294 myCoords[1] * num_blades_per_chassis_ + myCoords[2]];
295 DragonflyRouter* targetRouter = routers_[targetCoords[0] * (num_chassis_per_group_ * num_blades_per_chassis_) +
296 targetCoords[1] * num_blades_per_chassis_ + targetCoords[2]];
297 DragonflyRouter* currentRouter = myRouter;
299 // node->router local link
300 route->link_list.push_back(myRouter->my_nodes_[myCoords[3] * num_links_per_link_]);
302 *latency += myRouter->my_nodes_[myCoords[3] * num_links_per_link_]->latency();
304 if (has_limiter_) { // limiter for sender
305 std::pair<surf::LinkImpl*, surf::LinkImpl*> info = private_links_.at(nodePositionWithLoopback(src->id()));
306 route->link_list.push_back(info.first);
309 if (targetRouter != myRouter) {
311 // are we on a different group ?
312 if (targetRouter->group_ != currentRouter->group_) {
313 // go to the router of our group connected to this one.
314 if (currentRouter->blade_ != targetCoords[0]) {
315 // go to the nth router in our chassis
316 route->link_list.push_back(currentRouter->green_links_[targetCoords[0]]);
318 *latency += currentRouter->green_links_[targetCoords[0]]->latency();
319 currentRouter = routers_[myCoords[0] * (num_chassis_per_group_ * num_blades_per_chassis_) +
320 myCoords[1] * num_blades_per_chassis_ + targetCoords[0]];
323 if (currentRouter->chassis_ != 0) {
324 // go to the first chassis of our group
325 route->link_list.push_back(currentRouter->black_links_[0]);
327 *latency += currentRouter->black_links_[0]->latency();
328 currentRouter = routers_[myCoords[0] * (num_chassis_per_group_ * num_blades_per_chassis_) + targetCoords[0]];
331 // go to destination group - the only optical hop
332 route->link_list.push_back(currentRouter->blue_links_[0]);
334 *latency += currentRouter->blue_links_[0]->latency();
335 currentRouter = routers_[targetCoords[0] * (num_chassis_per_group_ * num_blades_per_chassis_) + myCoords[0]];
338 // same group, but same blade ?
339 if (targetRouter->blade_ != currentRouter->blade_) {
340 route->link_list.push_back(currentRouter->green_links_[targetCoords[2]]);
342 *latency += currentRouter->green_links_[targetCoords[2]]->latency();
343 currentRouter = routers_[targetCoords[0] * (num_chassis_per_group_ * num_blades_per_chassis_) + targetCoords[2]];
346 // same blade, but same chassis ?
347 if (targetRouter->chassis_ != currentRouter->chassis_) {
348 route->link_list.push_back(currentRouter->black_links_[targetCoords[1]]);
350 *latency += currentRouter->black_links_[targetCoords[1]]->latency();
354 if (has_limiter_) { // limiter for receiver
355 std::pair<surf::LinkImpl*, surf::LinkImpl*> info = private_links_.at(nodePositionWithLoopback(dst->id()));
356 route->link_list.push_back(info.first);
359 // router->node local link
360 route->link_list.push_back(targetRouter->my_nodes_[targetCoords[3] * num_links_per_link_ + num_links_per_link_ - 1]);
362 *latency += targetRouter->my_nodes_[targetCoords[3] * num_links_per_link_ + num_links_per_link_ - 1]->latency();