1 /* Copyright (c) 2014-2021. 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/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>
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_cluster_dragonfly, surf_route_cluster, "Dragonfly Routing part of surf");
22 DragonflyZone::DragonflyZone(const std::string& name) : ClusterZone(name) {}
24 DragonflyZone::Coords DragonflyZone::rankId_to_coords(int rankId) const
26 // coords : group, chassis, blade, node
28 coords.group = rankId / (num_chassis_per_group_ * num_blades_per_chassis_ * num_nodes_per_blade_);
29 rankId = rankId % (num_chassis_per_group_ * num_blades_per_chassis_ * num_nodes_per_blade_);
30 coords.chassis = rankId / (num_blades_per_chassis_ * num_nodes_per_blade_);
31 rankId = rankId % (num_blades_per_chassis_ * num_nodes_per_blade_);
32 coords.blade = rankId / num_nodes_per_blade_;
33 coords.node = rankId % num_nodes_per_blade_;
37 void DragonflyZone::rankId_to_coords(int rankId, unsigned int coords[4]) const // XBT_ATTRIB_DEPRECATED_v330
39 const auto s_coords = rankId_to_coords(rankId);
40 coords[0] = s_coords.group;
41 coords[1] = s_coords.chassis;
42 coords[2] = s_coords.blade;
43 coords[3] = s_coords.node;
46 void DragonflyZone::set_link_characteristics(double bw, double lat, s4u::Link::SharingPolicy sharing_policy)
48 sharing_policy_ = sharing_policy;
49 if (sharing_policy == s4u::Link::SharingPolicy::SPLITDUPLEX)
50 num_links_per_link_ = 2;
55 void DragonflyZone::set_topology(unsigned int n_groups, unsigned int groups_links, unsigned int n_chassis,
56 unsigned int chassis_links, unsigned int n_routers, unsigned int routers_links,
59 num_groups_ = n_groups;
60 num_links_blue_ = groups_links;
62 num_chassis_per_group_ = n_chassis;
63 num_links_black_ = chassis_links;
65 num_blades_per_chassis_ = n_routers;
66 num_links_green_ = routers_links;
68 num_nodes_per_blade_ = nodes;
71 s4u::DragonflyParams DragonflyZone::parse_topo_parameters(const std::string& topo_parameters)
73 std::vector<std::string> parameters;
74 std::vector<std::string> tmp;
75 boost::split(parameters, topo_parameters, boost::is_any_of(";"));
77 if (parameters.size() != 4)
79 "Dragonfly are defined by the number of groups, chassis per groups, blades per chassis, nodes per blade");
81 // Blue network : number of groups, number of links between each group
82 boost::split(tmp, parameters[0], boost::is_any_of(","));
84 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
86 unsigned int n_groups;
88 n_groups = std::stoi(tmp[0]);
89 } catch (const std::invalid_argument&) {
90 throw std::invalid_argument(std::string("Invalid number of groups:") + tmp[0]);
95 n_blue = std::stoi(tmp[1]);
96 } catch (const std::invalid_argument&) {
97 throw std::invalid_argument(std::string("Invalid number of links for the blue level:") + tmp[1]);
100 // Black network : number of chassis/group, number of links between each router on the black network
101 boost::split(tmp, parameters[1], boost::is_any_of(","));
103 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
105 unsigned int n_chassis;
107 n_chassis = std::stoi(tmp[0]);
108 } catch (const std::invalid_argument&) {
109 throw std::invalid_argument(std::string("Invalid number of chassis:") + tmp[0]);
112 unsigned int n_black;
114 n_black = std::stoi(tmp[1]);
115 } catch (const std::invalid_argument&) {
116 throw std::invalid_argument(std::string("Invalid number of links for the black level:") + tmp[1]);
119 // Green network : number of blades/chassis, number of links between each router on the green network
120 boost::split(tmp, parameters[2], boost::is_any_of(","));
122 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
124 unsigned int n_routers;
126 n_routers = std::stoi(tmp[0]);
127 } catch (const std::invalid_argument&) {
128 throw std::invalid_argument(std::string("Invalid number of routers:") + tmp[0]);
131 unsigned int n_green;
133 n_green = std::stoi(tmp[1]);
134 } catch (const std::invalid_argument&) {
135 throw std::invalid_argument(std::string("Invalid number of links for the green level:") + tmp[1]);
138 // The last part of topo_parameters should be the number of nodes per blade
139 unsigned int n_nodes;
141 n_nodes = std::stoi(parameters[3]);
142 } catch (const std::invalid_argument&) {
143 throw std::invalid_argument(std::string("Last parameter is not the amount of nodes per blade:") + parameters[3]);
145 return s4u::DragonflyParams({n_groups, n_blue}, {n_chassis, n_black}, {n_routers, n_green}, n_nodes);
148 /* Generate the cluster once every node is created */
149 void DragonflyZone::do_seal()
151 if (num_nodes_per_blade_ == 0)
158 void DragonflyZone::generate_routers()
160 routers_.reserve(num_groups_ * num_chassis_per_group_ * num_blades_per_chassis_);
161 for (unsigned int i = 0; i < num_groups_; i++)
162 for (unsigned int j = 0; j < num_chassis_per_group_; j++)
163 for (unsigned int k = 0; k < num_blades_per_chassis_; k++)
164 routers_.emplace_back(i, j, k);
167 void DragonflyZone::generate_link(const std::string& id, int numlinks, resource::LinkImpl** linkup,
168 resource::LinkImpl** linkdown)
170 XBT_DEBUG("Generating link %s", id.c_str());
173 if (sharing_policy_ == s4u::Link::SharingPolicy::SPLITDUPLEX) {
174 *linkup = create_link(id + "_UP", std::vector<double>{bw_ * numlinks})->set_latency(lat_)->seal()->get_impl();
175 *linkdown = create_link(id + "_DOWN", std::vector<double>{bw_ * numlinks})->set_latency(lat_)->seal()->get_impl();
177 *linkup = create_link(id, std::vector<double>{bw_ * numlinks})->set_latency(lat_)->seal()->get_impl();
182 void DragonflyZone::generate_links()
184 static int uniqueId = 0;
185 resource::LinkImpl* linkup;
186 resource::LinkImpl* linkdown;
188 unsigned int numRouters = num_groups_ * num_chassis_per_group_ * num_blades_per_chassis_;
190 // Links from routers to their local nodes.
191 for (unsigned int i = 0; i < numRouters; i++) {
192 // allocate structures
193 routers_[i].my_nodes_.resize(num_links_per_link_ * num_nodes_per_blade_);
194 routers_[i].green_links_.resize(num_blades_per_chassis_);
195 routers_[i].black_links_.resize(num_chassis_per_group_);
197 for (unsigned int j = 0; j < num_links_per_link_ * num_nodes_per_blade_; j += num_links_per_link_) {
198 std::string id = "local_link_from_router_" + std::to_string(i) + "_to_node_" +
199 std::to_string(j / num_links_per_link_) + "_" + std::to_string(uniqueId);
200 generate_link(id, 1, &linkup, &linkdown);
202 routers_[i].my_nodes_[j] = linkup;
203 if (sharing_policy_ == s4u::Link::SharingPolicy::SPLITDUPLEX)
204 routers_[i].my_nodes_[j + 1] = linkdown;
210 // Green links from routers to same chassis routers - alltoall
211 for (unsigned int i = 0; i < num_groups_ * num_chassis_per_group_; i++) {
212 for (unsigned int j = 0; j < num_blades_per_chassis_; j++) {
213 for (unsigned int k = j + 1; k < num_blades_per_chassis_; k++) {
214 std::string id = "green_link_in_chassis_" + std::to_string(i % num_chassis_per_group_) + "_between_routers_" +
215 std::to_string(j) + "_and_" + std::to_string(k) + "_" + std::to_string(uniqueId);
216 generate_link(id, num_links_green_, &linkup, &linkdown);
218 routers_[i * num_blades_per_chassis_ + j].green_links_[k] = linkup;
219 routers_[i * num_blades_per_chassis_ + k].green_links_[j] = linkdown;
225 // Black links from routers to same group routers - alltoall
226 for (unsigned int i = 0; i < num_groups_; i++) {
227 for (unsigned int j = 0; j < num_chassis_per_group_; j++) {
228 for (unsigned int k = j + 1; k < num_chassis_per_group_; k++) {
229 for (unsigned int l = 0; l < num_blades_per_chassis_; l++) {
230 std::string id = "black_link_in_group_" + std::to_string(i) + "_between_chassis_" + std::to_string(j) +
231 "_and_" + std::to_string(k) + "_blade_" + std::to_string(l) + "_" + std::to_string(uniqueId);
232 generate_link(id, num_links_black_, &linkup, &linkdown);
234 routers_[i * num_blades_per_chassis_ * num_chassis_per_group_ + j * num_blades_per_chassis_ + l]
235 .black_links_[k] = linkup;
236 routers_[i * num_blades_per_chassis_ * num_chassis_per_group_ + k * num_blades_per_chassis_ + l]
237 .black_links_[j] = linkdown;
244 // Blue links between groups - Not all routers involved, only one per group is linked to others. Let's say router n of
245 // each group is linked to group n.
246 // FIXME: in reality blue links may be attached to several different routers
247 for (unsigned int i = 0; i < num_groups_; i++) {
248 for (unsigned int j = i + 1; j < num_groups_; j++) {
249 unsigned int routernumi = i * num_blades_per_chassis_ * num_chassis_per_group_ + j;
250 unsigned int routernumj = j * num_blades_per_chassis_ * num_chassis_per_group_ + i;
251 std::string id = "blue_link_between_group_" + std::to_string(i) + "_and_" + std::to_string(j) + "_routers_" +
252 std::to_string(routernumi) + "_and_" + std::to_string(routernumj) + "_" +
253 std::to_string(uniqueId);
254 generate_link(id, num_links_blue_, &linkup, &linkdown);
256 routers_[routernumi].blue_link_ = linkup;
257 routers_[routernumj].blue_link_ = linkdown;
263 void DragonflyZone::get_local_route(NetPoint* src, NetPoint* dst, RouteCreationArgs* route, double* latency)
265 // Minimal routing version.
266 // TODO : non-minimal random one, and adaptive ?
268 if (dst->is_router() || src->is_router())
271 XBT_VERB("dragonfly getLocalRoute from '%s'[%u] to '%s'[%u]", src->get_cname(), src->id(), dst->get_cname(),
274 if ((src->id() == dst->id()) && has_loopback()) {
275 resource::LinkImpl* uplink = get_uplink_from(node_pos(src->id()));
277 route->link_list.push_back(uplink);
279 *latency += uplink->get_latency();
283 const auto myCoords = rankId_to_coords(src->id());
284 const auto targetCoords = rankId_to_coords(dst->id());
285 XBT_DEBUG("src : %u group, %u chassis, %u blade, %u node", myCoords.group, myCoords.chassis, myCoords.blade,
287 XBT_DEBUG("dst : %u group, %u chassis, %u blade, %u node", targetCoords.group, targetCoords.chassis,
288 targetCoords.blade, targetCoords.node);
290 DragonflyRouter* myRouter = &routers_[myCoords.group * (num_chassis_per_group_ * num_blades_per_chassis_) +
291 myCoords.chassis * num_blades_per_chassis_ + myCoords.blade];
292 DragonflyRouter* targetRouter = &routers_[targetCoords.group * (num_chassis_per_group_ * num_blades_per_chassis_) +
293 targetCoords.chassis * num_blades_per_chassis_ + targetCoords.blade];
294 DragonflyRouter* currentRouter = myRouter;
296 // node->router local link
297 route->link_list.push_back(myRouter->my_nodes_[myCoords.node * num_links_per_link_]);
299 *latency += myRouter->my_nodes_[myCoords.node * num_links_per_link_]->get_latency();
301 if (has_limiter()) { // limiter for sender
302 route->link_list.push_back(get_uplink_from(node_pos_with_loopback(src->id())));
305 if (targetRouter != myRouter) {
306 // are we on a different group ?
307 if (targetRouter->group_ != currentRouter->group_) {
308 // go to the router of our group connected to this one.
309 if (currentRouter->blade_ != targetCoords.group) {
310 // go to the nth router in our chassis
311 route->link_list.push_back(currentRouter->green_links_[targetCoords.group]);
313 *latency += currentRouter->green_links_[targetCoords.group]->get_latency();
314 currentRouter = &routers_[myCoords.group * (num_chassis_per_group_ * num_blades_per_chassis_) +
315 myCoords.chassis * num_blades_per_chassis_ + targetCoords.group];
318 if (currentRouter->chassis_ != 0) {
319 // go to the first chassis of our group
320 route->link_list.push_back(currentRouter->black_links_[0]);
322 *latency += currentRouter->black_links_[0]->get_latency();
324 &routers_[myCoords.group * (num_chassis_per_group_ * num_blades_per_chassis_) + targetCoords.group];
327 // go to destination group - the only optical hop
328 route->link_list.push_back(currentRouter->blue_link_);
330 *latency += currentRouter->blue_link_->get_latency();
332 &routers_[targetCoords.group * (num_chassis_per_group_ * num_blades_per_chassis_) + myCoords.group];
335 // same group, but same blade ?
336 if (targetRouter->blade_ != currentRouter->blade_) {
337 route->link_list.push_back(currentRouter->green_links_[targetCoords.blade]);
339 *latency += currentRouter->green_links_[targetCoords.blade]->get_latency();
341 &routers_[targetCoords.group * (num_chassis_per_group_ * num_blades_per_chassis_) + targetCoords.blade];
344 // same blade, but same chassis ?
345 if (targetRouter->chassis_ != currentRouter->chassis_) {
346 route->link_list.push_back(currentRouter->black_links_[targetCoords.chassis]);
348 *latency += currentRouter->black_links_[targetCoords.chassis]->get_latency();
352 if (has_limiter()) { // limiter for receiver
353 route->link_list.push_back(get_downlink_to(node_pos_with_loopback(dst->id())));
356 // router->node local link
357 route->link_list.push_back(
358 targetRouter->my_nodes_[targetCoords.node * num_links_per_link_ + num_links_per_link_ - 1]);
361 targetRouter->my_nodes_[targetCoords.node * num_links_per_link_ + num_links_per_link_ - 1]->get_latency();
363 // set gateways (if any)
364 route->gw_src = get_gateway(src->id());
365 route->gw_dst = get_gateway(dst->id());
367 } // namespace routing
368 } // namespace kernel
371 DragonflyParams::DragonflyParams(const std::pair<unsigned int, unsigned int>& groups,
372 const std::pair<unsigned int, unsigned int>& chassis,
373 const std::pair<unsigned int, unsigned int>& routers, unsigned int nodes)
374 : groups(groups), chassis(chassis), routers(routers), nodes(nodes)
376 if (groups.first == 0)
377 throw std::invalid_argument("Dragonfly: Invalid number of groups, must be > 0");
378 if (groups.second == 0)
379 throw std::invalid_argument("Dragonfly: Invalid number of blue (groups) links, must be > 0");
380 if (chassis.first == 0)
381 throw std::invalid_argument("Dragonfly: Invalid number of chassis, must be > 0");
382 if (chassis.second == 0)
383 throw std::invalid_argument("Dragonfly: Invalid number of black (chassis) links, must be > 0");
384 if (routers.first == 0)
385 throw std::invalid_argument("Dragonfly: Invalid number of routers, must be > 0");
386 if (routers.second == 0)
387 throw std::invalid_argument("Dragonfly: Invalid number of green (routers) links, must be > 0");
389 throw std::invalid_argument("Dragonfly: Invalid number of nodes, must be > 0");
392 NetZone* create_dragonfly_zone(const std::string& name, const NetZone* parent, const DragonflyParams& params,
393 double bandwidth, double latency, Link::SharingPolicy sharing_policy,
394 const std::function<ClusterNetPointCb>& set_netpoint,
395 const std::function<ClusterLinkCb>& set_loopback,
396 const std::function<ClusterLinkCb>& set_limiter)
400 throw std::invalid_argument("DragonflyZone: incorrect bandwidth for internode communication, bw=" +
401 std::to_string(bandwidth));
403 throw std::invalid_argument("DragonflyZone: incorrect latency for internode communication, lat=" +
404 std::to_string(latency));
407 auto* zone = new kernel::routing::DragonflyZone(name);
408 zone->set_topology(params.groups.first, params.groups.second, params.chassis.first, params.chassis.second,
409 params.routers.first, params.routers.second, params.nodes);
411 zone->set_parent(parent->get_impl());
412 zone->set_link_characteristics(bandwidth, latency, sharing_policy);
415 std::vector<unsigned int> dimensions = {params.groups.first, params.chassis.first, params.routers.first,
417 int tot_elements = std::accumulate(dimensions.begin(), dimensions.end(), 1, std::multiplies<>());
418 for (int i = 0; i < tot_elements; i++) {
419 kernel::routing::NetPoint* netpoint;
422 zone->fill_leaf_from_cb(i, dimensions, set_netpoint, set_loopback, set_limiter, &netpoint, &loopback, &limiter);
425 return zone->get_iface();
429 } // namespace simgrid