1 /* Copyright (c) 2009-2017. 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 "src/kernel/routing/FloydZone.hpp"
7 #include "src/kernel/routing/NetPoint.hpp"
8 #include "src/surf/network_interface.hpp"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_floyd, surf, "Routing part of surf");
16 #define TO_FLOYD_COST(i, j) (costTable_)[(i) + (j)*table_size]
17 #define TO_FLOYD_PRED(i, j) (predecessorTable_)[(i) + (j)*table_size]
18 #define TO_FLOYD_LINK(i, j) (linkTable_)[(i) + (j)*table_size]
24 FloydZone::FloydZone(NetZone* father, std::string name) : RoutedZone(father, name)
26 predecessorTable_ = nullptr;
31 FloydZone::~FloydZone()
33 if (linkTable_ == nullptr) // Dealing with a parse error in the file?
35 unsigned int table_size = getTableSize();
36 /* Delete link_table */
37 for (unsigned int i = 0; i < table_size; i++)
38 for (unsigned int j = 0; j < table_size; j++)
39 delete TO_FLOYD_LINK(i, j);
42 delete[] predecessorTable_;
46 void FloydZone::getLocalRoute(NetPoint* src, NetPoint* dst, sg_platf_route_cbarg_t route, double* lat)
48 unsigned int table_size = getTableSize();
50 getRouteCheckParams(src, dst);
52 /* create a result route */
53 std::vector<sg_platf_route_cbarg_t> route_stack;
54 unsigned int cur = dst->id();
56 int pred = TO_FLOYD_PRED(src->id(), cur);
58 THROWF(arg_error, 0, "No route from '%s' to '%s'", src->getCname(), dst->getCname());
59 route_stack.push_back(TO_FLOYD_LINK(pred, cur));
61 } while (cur != src->id());
63 if (hierarchy_ == RoutingMode::recursive) {
64 route->gw_src = route_stack.back()->gw_src;
65 route->gw_dst = route_stack.front()->gw_dst;
68 sg_netpoint_t prev_dst_gw = nullptr;
69 while (not route_stack.empty()) {
70 sg_platf_route_cbarg_t e_route = route_stack.back();
71 route_stack.pop_back();
72 if (hierarchy_ == RoutingMode::recursive && prev_dst_gw != nullptr &&
73 prev_dst_gw->getCname() != e_route->gw_src->getCname()) {
74 getGlobalRoute(prev_dst_gw, e_route->gw_src, route->link_list, lat);
77 for (auto const& link : e_route->link_list) {
78 route->link_list.push_back(link);
80 *lat += link->latency();
83 prev_dst_gw = e_route->gw_dst;
87 void FloydZone::addRoute(sg_platf_route_cbarg_t route)
89 /* set the size of table routing */
90 unsigned int table_size = getTableSize();
92 addRouteCheckParams(route);
95 /* Create Cost, Predecessor and Link tables */
96 costTable_ = new double[table_size * table_size]; /* link cost from host to host */
97 predecessorTable_ = new int[table_size * table_size]; /* predecessor host numbers */
98 linkTable_ = new sg_platf_route_cbarg_t[table_size * table_size]; /* actual link between src and dst */
100 /* Initialize costs and predecessors */
101 for (unsigned int i = 0; i < table_size; i++)
102 for (unsigned int j = 0; j < table_size; j++) {
103 TO_FLOYD_COST(i, j) = DBL_MAX;
104 TO_FLOYD_PRED(i, j) = -1;
105 TO_FLOYD_LINK(i, j) = nullptr;
109 /* Check that the route does not already exist */
110 if (route->gw_dst) // netzone route (to adapt the error message, if any)
111 xbt_assert(nullptr == TO_FLOYD_LINK(route->src->id(), route->dst->id()),
112 "The route between %s@%s and %s@%s already exists (Rq: routes are symmetrical by default).",
113 route->src->getCname(), route->gw_src->getCname(), route->dst->getCname(), route->gw_dst->getCname());
115 xbt_assert(nullptr == TO_FLOYD_LINK(route->src->id(), route->dst->id()),
116 "The route between %s and %s already exists (Rq: routes are symmetrical by default).",
117 route->src->getCname(), route->dst->getCname());
119 TO_FLOYD_LINK(route->src->id(), route->dst->id()) = newExtendedRoute(hierarchy_, route, 1);
120 TO_FLOYD_PRED(route->src->id(), route->dst->id()) = route->src->id();
121 TO_FLOYD_COST(route->src->id(), route->dst->id()) =
122 (TO_FLOYD_LINK(route->src->id(), route->dst->id()))->link_list.size();
124 if (route->symmetrical == true) {
125 if (route->gw_dst) // netzone route (to adapt the error message, if any)
127 nullptr == TO_FLOYD_LINK(route->dst->id(), route->src->id()),
128 "The route between %s@%s and %s@%s already exists. You should not declare the reverse path as symmetrical.",
129 route->dst->getCname(), route->gw_dst->getCname(), route->src->getCname(), route->gw_src->getCname());
131 xbt_assert(nullptr == TO_FLOYD_LINK(route->dst->id(), route->src->id()),
132 "The route between %s and %s already exists. You should not declare the reverse path as symmetrical.",
133 route->dst->getCname(), route->src->getCname());
135 if (route->gw_dst && route->gw_src) {
136 NetPoint* gw_tmp = route->gw_src;
137 route->gw_src = route->gw_dst;
138 route->gw_dst = gw_tmp;
141 if (not route->gw_src || not route->gw_dst)
142 XBT_DEBUG("Load Route from \"%s\" to \"%s\"", route->dst->getCname(), route->src->getCname());
144 XBT_DEBUG("Load NetzoneRoute from \"%s(%s)\" to \"%s(%s)\"", route->dst->getCname(), route->gw_src->getCname(),
145 route->src->getCname(), route->gw_dst->getCname());
147 TO_FLOYD_LINK(route->dst->id(), route->src->id()) = newExtendedRoute(hierarchy_, route, 0);
148 TO_FLOYD_PRED(route->dst->id(), route->src->id()) = route->dst->id();
149 TO_FLOYD_COST(route->dst->id(), route->src->id()) =
150 (TO_FLOYD_LINK(route->dst->id(), route->src->id()))->link_list.size(); /* count of links, old model assume 1 */
154 void FloydZone::seal()
156 /* set the size of table routing */
157 unsigned int table_size = getTableSize();
159 if (not linkTable_) {
160 /* Create Cost, Predecessor and Link tables */
161 costTable_ = new double[table_size * table_size]; /* link cost from host to host */
162 predecessorTable_ = new int[table_size * table_size]; /* predecessor host numbers */
163 linkTable_ = new sg_platf_route_cbarg_t[table_size * table_size]; /* actual link between src and dst */
165 /* Initialize costs and predecessors */
166 for (unsigned int i = 0; i < table_size; i++)
167 for (unsigned int j = 0; j < table_size; j++) {
168 TO_FLOYD_COST(i, j) = DBL_MAX;
169 TO_FLOYD_PRED(i, j) = -1;
170 TO_FLOYD_LINK(i, j) = nullptr;
174 /* Add the loopback if needed */
175 if (surf_network_model->loopback_ && hierarchy_ == RoutingMode::base) {
176 for (unsigned int i = 0; i < table_size; i++) {
177 sg_platf_route_cbarg_t e_route = TO_FLOYD_LINK(i, i);
179 e_route = new s_sg_platf_route_cbarg_t;
180 e_route->gw_src = nullptr;
181 e_route->gw_dst = nullptr;
182 e_route->link_list.push_back(surf_network_model->loopback_);
183 TO_FLOYD_LINK(i, i) = e_route;
184 TO_FLOYD_PRED(i, i) = i;
185 TO_FLOYD_COST(i, i) = 1;
189 /* Calculate path costs */
190 for (unsigned int c = 0; c < table_size; c++) {
191 for (unsigned int a = 0; a < table_size; a++) {
192 for (unsigned int b = 0; b < table_size; b++) {
193 if (TO_FLOYD_COST(a, c) < DBL_MAX && TO_FLOYD_COST(c, b) < DBL_MAX &&
194 (fabs(TO_FLOYD_COST(a, b) - DBL_MAX) < std::numeric_limits<double>::epsilon() ||
195 (TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b) < TO_FLOYD_COST(a, b)))) {
196 TO_FLOYD_COST(a, b) = TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b);
197 TO_FLOYD_PRED(a, b) = TO_FLOYD_PRED(c, b);