1 /* Copyright (c) 2009-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "src/surf/surf_routing_private.hpp"
8 #include "src/surf/surf_routing_floyd.hpp"
9 #include "src/surf/network_interface.hpp"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_floyd, surf, "Routing part of surf");
13 #define TO_FLOYD_COST(i,j) (p_costTable)[(i)+(j)*table_size]
14 #define TO_FLOYD_PRED(i,j) (p_predecessorTable)[(i)+(j)*table_size]
15 #define TO_FLOYD_LINK(i,j) (p_linkTable)[(i)+(j)*table_size]
20 AsFloyd::AsFloyd(const char*name)
23 p_predecessorTable = NULL;
31 table_size = (int)xbt_dynar_length(p_indexNetworkElm);
32 if (p_linkTable == NULL) // Dealing with a parse error in the file?
34 /* Delete link_table */
35 for (i = 0; i < table_size; i++)
36 for (j = 0; j < table_size; j++) {
37 routing_route_free(TO_FLOYD_LINK(i, j));
39 xbt_free(p_linkTable);
40 /* Delete bypass dict */
41 xbt_dict_free(&bypassRoutes_);
42 /* Delete predecessor and cost table */
43 xbt_free(p_predecessorTable);
44 xbt_free(p_costTable);
47 /* Business methods */
48 xbt_dynar_t AsFloyd::getOneLinkRoutes()
50 xbt_dynar_t ret = xbt_dynar_new(sizeof(Onelink*), xbt_free_f);
51 sg_platf_route_cbarg_t route = xbt_new0(s_sg_platf_route_cbarg_t, 1);
52 route->link_list = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
55 sg_netcard_t src_elm, dst_elm;
56 int table_size = xbt_dynar_length(p_indexNetworkElm);
57 for(src=0; src < table_size; src++) {
58 for(dst=0; dst< table_size; dst++) {
59 xbt_dynar_reset(route->link_list);
60 src_elm = xbt_dynar_get_as(p_indexNetworkElm, src, NetCard*);
61 dst_elm = xbt_dynar_get_as(p_indexNetworkElm, dst, NetCard*);
62 this->getRouteAndLatency(src_elm, dst_elm, route, NULL);
64 if (xbt_dynar_length(route->link_list) == 1) {
65 void *link = *(void **) xbt_dynar_get_ptr(route->link_list, 0);
67 if (hierarchy_ == SURF_ROUTING_BASE)
68 onelink = new Onelink(link, src_elm, dst_elm);
69 else if (hierarchy_ == SURF_ROUTING_RECURSIVE)
70 onelink = new Onelink(link, route->gw_src, route->gw_dst);
72 onelink = new Onelink(link, NULL, NULL);
73 xbt_dynar_push(ret, &onelink);
81 void AsFloyd::getRouteAndLatency(NetCard *src, NetCard *dst, sg_platf_route_cbarg_t res, double *lat)
85 size_t table_size = xbt_dynar_length(p_indexNetworkElm);
87 this->srcDstCheck(src, dst);
89 /* create a result route */
90 xbt_dynar_t route_stack = xbt_dynar_new(sizeof(sg_platf_route_cbarg_t), NULL);
92 int cur = dst->getId();
94 pred = TO_FLOYD_PRED(src->getId(), cur);
96 THROWF(arg_error, 0, "No route from '%s' to '%s'", src->getName(), dst->getName());
97 xbt_dynar_push_as(route_stack, sg_platf_route_cbarg_t, TO_FLOYD_LINK(pred, cur));
99 } while (cur != src->getId());
101 if (hierarchy_ == SURF_ROUTING_RECURSIVE) {
102 res->gw_src = xbt_dynar_getlast_as(route_stack, sg_platf_route_cbarg_t)->gw_src;
103 res->gw_dst = xbt_dynar_getfirst_as(route_stack, sg_platf_route_cbarg_t)->gw_dst;
106 sg_netcard_t prev_dst_gw = NULL;
107 while (!xbt_dynar_is_empty(route_stack)) {
108 sg_platf_route_cbarg_t e_route = xbt_dynar_pop_as(route_stack, sg_platf_route_cbarg_t);
113 if (hierarchy_ == SURF_ROUTING_RECURSIVE && prev_dst_gw != NULL
114 && strcmp(prev_dst_gw->getName(), e_route->gw_src->getName())) {
115 routing_platf->getRouteAndLatency(prev_dst_gw, e_route->gw_src,
116 &res->link_list, lat);
119 links = e_route->link_list;
120 xbt_dynar_foreach(links, cpt, link) {
121 xbt_dynar_push_as(res->link_list, sg_routing_link_t, link);
123 *lat += static_cast<Link*>(link)->getLatency();
126 prev_dst_gw = e_route->gw_dst;
128 xbt_dynar_free(&route_stack);
131 static int floyd_pointer_resource_cmp(const void *a, const void *b) {
135 void AsFloyd::parseASroute(sg_platf_route_cbarg_t route){
139 void AsFloyd::parseRoute(sg_platf_route_cbarg_t route)
141 char *src = (char*)(route->src);
142 char *dst = (char*)(route->dst);
146 /* set the size of table routing */
147 int table_size = (int)xbt_dynar_length(p_indexNetworkElm);
148 NetCard *src_net_elm, *dst_net_elm;
150 src_net_elm = sg_netcard_by_name_or_null(src);
151 dst_net_elm = sg_netcard_by_name_or_null(dst);
153 xbt_assert(src_net_elm, "Network elements %s not found", src);
154 xbt_assert(dst_net_elm, "Network elements %s not found", dst);
159 /* Create Cost, Predecessor and Link tables */
160 p_costTable = xbt_new0(double, table_size * table_size); /* link cost from host to host */
161 p_predecessorTable = xbt_new0(int, table_size * table_size); /* predecessor host numbers */
162 p_linkTable = xbt_new0(sg_platf_route_cbarg_t, table_size * table_size); /* actual link between src and dst */
164 /* Initialize costs and predecessors */
165 for (i = 0; i < table_size; i++)
166 for (j = 0; j < table_size; j++) {
167 TO_FLOYD_COST(i, j) = DBL_MAX;
168 TO_FLOYD_PRED(i, j) = -1;
169 TO_FLOYD_LINK(i, j) = NULL; /* fixed, missing in the previous version */
172 if(!route->gw_dst && !route->gw_src)
173 XBT_DEBUG("Load Route from \"%s\" to \"%s\"", src, dst);
176 XBT_DEBUG("Load ASroute from \"%s(%s)\" to \"%s(%s)\"", src,
177 route->gw_src->getName(), dst, route->gw_dst->getName());
178 if(route->gw_dst->getRcType() == SURF_NETWORK_ELEMENT_NULL)
179 surf_parse_error("The dst_gateway '%s' does not exist!",route->gw_dst->getName());
180 if(route->gw_src->getRcType() == SURF_NETWORK_ELEMENT_NULL)
181 surf_parse_error("The src_gateway '%s' does not exist!",route->gw_src->getName());
184 if(TO_FLOYD_LINK(src_net_elm->getId(), dst_net_elm->getId()))
189 xbt_dynar_t link_route_to_test = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
190 xbt_dynar_foreach(route->link_list,cpt,link_name)
192 void *link = Link::byName(link_name);
193 xbt_assert(link,"Link : '%s' doesn't exists.",link_name);
194 xbt_dynar_push(link_route_to_test,&link);
196 xbt_assert(!xbt_dynar_compare(
197 TO_FLOYD_LINK(src_net_elm->getId(), dst_net_elm->getId())->link_list,
199 (int_f_cpvoid_cpvoid_t) floyd_pointer_resource_cmp),
200 "The route between \"%s\" and \"%s\" already exists", src,dst);
204 TO_FLOYD_LINK(src_net_elm->getId(), dst_net_elm->getId()) =
205 newExtendedRoute(hierarchy_, route, 1);
206 TO_FLOYD_PRED(src_net_elm->getId(), dst_net_elm->getId()) = src_net_elm->getId();
207 TO_FLOYD_COST(src_net_elm->getId(), dst_net_elm->getId()) =
208 ((TO_FLOYD_LINK(src_net_elm->getId(), dst_net_elm->getId()))->link_list)->used; /* count of links, old model assume 1 */
211 if ( (route->symmetrical == TRUE && as_route == 0)
212 || (route->symmetrical == TRUE && as_route == 1)
215 if(TO_FLOYD_LINK(dst_net_elm->getId(), src_net_elm->getId()))
217 if(!route->gw_dst && !route->gw_src)
218 XBT_DEBUG("See Route from \"%s\" to \"%s\"", dst, src);
220 XBT_DEBUG("See ASroute from \"%s(%s)\" to \"%s(%s)\"", dst,
221 route->gw_src->getName(), src, route->gw_dst->getName());
224 xbt_dynar_t link_route_to_test = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
225 for(i=xbt_dynar_length(route->link_list) ;i>0 ;i--)
227 link_name = xbt_dynar_get_as(route->link_list,i-1,char *);
228 void *link = Link::byName(link_name);
229 xbt_assert(link,"Link : '%s' doesn't exists.",link_name);
230 xbt_dynar_push(link_route_to_test,&link);
232 xbt_assert(!xbt_dynar_compare(
233 TO_FLOYD_LINK(dst_net_elm->getId(), src_net_elm->getId())->link_list,
235 (int_f_cpvoid_cpvoid_t) floyd_pointer_resource_cmp),
236 "The route between \"%s\" and \"%s\" already exists", src,dst);
240 if(route->gw_dst && route->gw_src)
242 sg_netcard_t gw_src = route->gw_src;
243 sg_netcard_t gw_dst = route->gw_dst;
244 route->gw_src = gw_dst;
245 route->gw_dst = gw_src;
248 if(!route->gw_src && !route->gw_dst)
249 XBT_DEBUG("Load Route from \"%s\" to \"%s\"", dst, src);
251 XBT_DEBUG("Load ASroute from \"%s(%s)\" to \"%s(%s)\"", dst,
252 route->gw_src->getName(), src, route->gw_dst->getName());
254 TO_FLOYD_LINK(dst_net_elm->getId(), src_net_elm->getId()) =
255 newExtendedRoute(hierarchy_, route, 0);
256 TO_FLOYD_PRED(dst_net_elm->getId(), src_net_elm->getId()) = dst_net_elm->getId();
257 TO_FLOYD_COST(dst_net_elm->getId(), src_net_elm->getId()) =
258 ((TO_FLOYD_LINK(dst_net_elm->getId(), src_net_elm->getId()))->link_list)->used; /* count of links, old model assume 1 */
261 xbt_dynar_free(&route->link_list);
264 void AsFloyd::Seal(){
265 unsigned int i, j, a, b, c;
267 /* set the size of table routing */
268 size_t table_size = xbt_dynar_length(p_indexNetworkElm);
271 /* Create Cost, Predecessor and Link tables */
272 p_costTable = xbt_new0(double, table_size * table_size); /* link cost from host to host */
273 p_predecessorTable = xbt_new0(int, table_size * table_size); /* predecessor host numbers */
274 p_linkTable = xbt_new0(sg_platf_route_cbarg_t, table_size * table_size); /* actual link between src and dst */
276 /* Initialize costs and predecessors */
277 for (i = 0; i < table_size; i++)
278 for (j = 0; j < table_size; j++) {
279 TO_FLOYD_COST(i, j) = DBL_MAX;
280 TO_FLOYD_PRED(i, j) = -1;
281 TO_FLOYD_LINK(i, j) = NULL; /* fixed, missing in the previous version */
285 /* Add the loopback if needed */
286 if (routing_platf->p_loopback && hierarchy_ == SURF_ROUTING_BASE) {
287 for (i = 0; i < table_size; i++) {
288 sg_platf_route_cbarg_t e_route = TO_FLOYD_LINK(i, i);
290 e_route = xbt_new0(s_sg_platf_route_cbarg_t, 1);
291 e_route->gw_src = NULL;
292 e_route->gw_dst = NULL;
293 e_route->link_list = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
294 xbt_dynar_push(e_route->link_list, &routing_platf->p_loopback);
295 TO_FLOYD_LINK(i, i) = e_route;
296 TO_FLOYD_PRED(i, i) = i;
297 TO_FLOYD_COST(i, i) = 1;
301 /* Calculate path costs */
302 for (c = 0; c < table_size; c++) {
303 for (a = 0; a < table_size; a++) {
304 for (b = 0; b < table_size; b++) {
305 if (TO_FLOYD_COST(a, c) < DBL_MAX && TO_FLOYD_COST(c, b) < DBL_MAX) {
306 if (TO_FLOYD_COST(a, b) == DBL_MAX ||
307 (TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b) <
308 TO_FLOYD_COST(a, b))) {
309 TO_FLOYD_COST(a, b) =
310 TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b);
311 TO_FLOYD_PRED(a, b) = TO_FLOYD_PRED(c, b);