1 /* Copyright (c) 2009, 2010, 2011. 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 "surf_routing_private.h"
10 extern routing_global_t global_routing;
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_floyd, surf, "Routing part of surf");
14 #define TO_FLOYD_COST(i,j) (as->cost_table)[(i)+(j)*table_size]
15 #define TO_FLOYD_PRED(i,j) (as->predecessor_table)[(i)+(j)*table_size]
16 #define TO_FLOYD_LINK(i,j) (as->link_table)[(i)+(j)*table_size]
18 /* Routing model structure */
21 s_as_t generic_routing;
22 /* vars for calculate the floyd algorith. */
23 int *predecessor_table;
26 } s_as_floyd_t, *as_floyd_t;
28 static void floyd_get_route_and_latency(AS_t asg, const char *src, const char *dst,
29 route_t res, double *lat);
31 /* Business methods */
32 static xbt_dynar_t floyd_get_onelink_routes(AS_t asg)
34 xbt_dynar_t ret = xbt_dynar_new(sizeof(onelink_t), xbt_free);
36 route_t route = xbt_new0(s_route_t, 1);
37 route->link_list = xbt_dynar_new(global_routing->size_of_link, NULL);
39 xbt_dict_cursor_t c1 = NULL, c2 = NULL;
40 char *k1, *d1, *k2, *d2;
41 xbt_dict_foreach(asg->to_index, c1, k1, d1) {
42 xbt_dict_foreach(asg->to_index, c2, k2, d2) {
43 xbt_dynar_reset(route->link_list);
44 floyd_get_route_and_latency(asg, k1, k2, route, NULL);
45 if (xbt_dynar_length(route->link_list) == 1) {
46 void *link = *(void **) xbt_dynar_get_ptr(route->link_list, 0);
47 onelink_t onelink = xbt_new0(s_onelink_t, 1);
48 onelink->link_ptr = link;
49 if (asg->hierarchy == SURF_ROUTING_BASE) {
50 onelink->src = xbt_strdup(k1);
51 onelink->dst = xbt_strdup(k2);
52 } else if (asg->hierarchy == SURF_ROUTING_RECURSIVE) {
53 onelink->src = xbt_strdup(route->src_gateway);
54 onelink->dst = xbt_strdup(route->dst_gateway);
56 xbt_dynar_push(ret, &onelink);
63 static void floyd_get_route_and_latency(AS_t asg, const char *src, const char *dst,
64 route_t res, double *lat)
68 as_floyd_t as = (as_floyd_t)asg;
69 size_t table_size = xbt_dict_length(asg->to_index);
71 generic_src_dst_check(asg, src, dst);
72 int *src_id = xbt_dict_get_or_null(asg->to_index, src);
73 int *dst_id = xbt_dict_get_or_null(asg->to_index, dst);
74 if (src_id == NULL || dst_id == NULL)
75 THROWF(arg_error,0,"No route from '%s' to '%s'",src,dst);
77 /* create a result route */
82 char *gw_src = NULL, *gw_dst = NULL, *prev_gw_src, *first_gw = NULL;
89 pred = TO_FLOYD_PRED(*src_id, pred);
90 if (pred == -1) /* if no pred in route -> no route to host */
92 xbt_assert(TO_FLOYD_LINK(pred, prev_pred),
93 "Invalid link for the route between \"%s\" or \"%s\"", src,
98 route_t e_route = TO_FLOYD_LINK(pred, prev_pred);
99 gw_src = e_route->src_gateway;
100 gw_dst = e_route->dst_gateway;
105 if (asg->hierarchy == SURF_ROUTING_RECURSIVE && !first
106 && strcmp(gw_dst, prev_gw_src)) {
107 xbt_dynar_t e_route_as_to_as;
108 e_route_as_to_as = xbt_dynar_new(global_routing->size_of_link, NULL);
109 routing_get_route_and_latency(gw_dst, prev_gw_src,&e_route_as_to_as,NULL);
110 links = e_route_as_to_as;
112 xbt_dynar_foreach(links, cpt, link) {
113 xbt_dynar_insert_at(res->link_list, pos, &link);
115 *lat += surf_network_model->extension.network.get_link_latency(link);
118 xbt_dynar_free(&e_route_as_to_as);
121 links = e_route->link_list;
122 xbt_dynar_foreach(links, cpt, link) {
123 xbt_dynar_unshift(res->link_list, &link);
125 *lat += surf_network_model->extension.network.get_link_latency(link);
129 } while (pred != *src_id);
131 THROWF(arg_error,0,"No route from '%s' to '%s'",src,dst);
133 if (asg->hierarchy == SURF_ROUTING_RECURSIVE) {
134 res->src_gateway = xbt_strdup(gw_src);
135 res->dst_gateway = xbt_strdup(first_gw);
139 static void floyd_finalize(AS_t rc)
141 as_floyd_t as = (as_floyd_t) rc;
145 table_size = xbt_dict_length(as->generic_routing.to_index);
146 /* Delete link_table */
147 for (i = 0; i < table_size; i++)
148 for (j = 0; j < table_size; j++)
149 generic_free_route(TO_FLOYD_LINK(i, j));
150 xbt_free(as->link_table);
151 /* Delete bypass dict */
152 xbt_dict_free(&as->generic_routing.bypassRoutes);
153 /* Delete index dict */
154 xbt_dict_free(&(as->generic_routing.to_index));
155 /* Delete predecessor and cost table */
156 xbt_free(as->predecessor_table);
157 xbt_free(as->cost_table);
159 model_generic_finalize(rc);
163 AS_t model_floyd_create(void)
165 as_floyd_t new_component = (as_floyd_t)model_generic_create_sized(sizeof(s_as_floyd_t));
166 new_component->generic_routing.parse_route = model_floyd_parse_route;
167 new_component->generic_routing.parse_ASroute = model_floyd_parse_route;
168 new_component->generic_routing.get_route_and_latency = floyd_get_route_and_latency;
169 new_component->generic_routing.get_onelink_routes =
170 floyd_get_onelink_routes;
171 new_component->generic_routing.finalize = floyd_finalize;
172 return (AS_t)new_component;
175 void model_floyd_end(AS_t current_routing)
179 ((as_floyd_t) current_routing);
181 unsigned int i, j, a, b, c;
183 /* set the size of table routing */
184 size_t table_size = xbt_dict_length(as->generic_routing.to_index);
188 /* Create Cost, Predecessor and Link tables */
189 as->cost_table = xbt_new0(double, table_size * table_size); /* link cost from host to host */
190 as->predecessor_table = xbt_new0(int, table_size * table_size); /* predecessor host numbers */
191 as->link_table = xbt_new0(route_t, table_size * table_size); /* actual link between src and dst */
193 /* Initialize costs and predecessors */
194 for (i = 0; i < table_size; i++)
195 for (j = 0; j < table_size; j++) {
196 TO_FLOYD_COST(i, j) = DBL_MAX;
197 TO_FLOYD_PRED(i, j) = -1;
198 TO_FLOYD_LINK(i, j) = NULL; /* fixed, missing in the previous version */
202 /* Add the loopback if needed */
203 if (current_routing->hierarchy == SURF_ROUTING_BASE) {
204 for (i = 0; i < table_size; i++) {
205 route_t e_route = TO_FLOYD_LINK(i, i);
207 e_route = xbt_new0(s_route_t, 1);
208 e_route->src_gateway = NULL;
209 e_route->dst_gateway = NULL;
211 xbt_dynar_new(global_routing->size_of_link, NULL);
212 xbt_dynar_push(e_route->link_list, &global_routing->loopback);
213 TO_FLOYD_LINK(i, i) = e_route;
214 TO_FLOYD_PRED(i, i) = i;
215 TO_FLOYD_COST(i, i) = 1;
219 /* Calculate path costs */
220 for (c = 0; c < table_size; c++) {
221 for (a = 0; a < table_size; a++) {
222 for (b = 0; b < table_size; b++) {
223 if (TO_FLOYD_COST(a, c) < DBL_MAX && TO_FLOYD_COST(c, b) < DBL_MAX) {
224 if (TO_FLOYD_COST(a, b) == DBL_MAX ||
225 (TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b) <
226 TO_FLOYD_COST(a, b))) {
227 TO_FLOYD_COST(a, b) =
228 TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b);
229 TO_FLOYD_PRED(a, b) = TO_FLOYD_PRED(c, b);
237 static int floyd_pointer_resource_cmp(const void *a, const void *b) {
241 //FIXME: kill dupplicates in next function with full routing
243 void model_floyd_parse_route(AS_t rc, const char *src,
244 const char *dst, route_t route)
246 as_floyd_t as = (as_floyd_t) rc;
248 /* set the size of table routing */
249 size_t table_size = xbt_dict_length(rc->to_index);
250 int *src_id, *dst_id;
253 src_id = xbt_dict_get_or_null(rc->to_index, src);
254 dst_id = xbt_dict_get_or_null(rc->to_index, dst);
256 xbt_assert(src_id, "Network elements %s not found", src);
257 xbt_assert(dst_id, "Network elements %s not found", dst);
261 /* Create Cost, Predecessor and Link tables */
262 as->cost_table = xbt_new0(double, table_size * table_size); /* link cost from host to host */
263 as->predecessor_table = xbt_new0(int, table_size * table_size); /* predecessor host numbers */
264 as->link_table = xbt_new0(route_t, table_size * table_size); /* actual link between src and dst */
266 /* Initialize costs and predecessors */
267 for (i = 0; i < table_size; i++)
268 for (j = 0; j < table_size; j++) {
269 TO_FLOYD_COST(i, j) = DBL_MAX;
270 TO_FLOYD_PRED(i, j) = -1;
271 TO_FLOYD_LINK(i, j) = NULL; /* fixed, missing in the previous version */
275 if(TO_FLOYD_LINK(*src_id, *dst_id))
277 if(!route->dst_gateway && !route->src_gateway)
278 XBT_DEBUG("See Route from \"%s\" to \"%s\"", src, dst);
280 XBT_DEBUG("See ASroute from \"%s(%s)\" to \"%s(%s)\"", src,
281 route->src_gateway, dst, route->dst_gateway);
284 xbt_dynar_t link_route_to_test = xbt_dynar_new(global_routing->size_of_link, NULL);
285 xbt_dynar_foreach(route->link_list,cpt,link_name)
287 void *link = xbt_lib_get_or_null(link_lib, link_name, SURF_LINK_LEVEL);
288 xbt_assert(link,"Link : '%s' doesn't exists.",link_name);
289 xbt_dynar_push(link_route_to_test,&link);
291 xbt_assert(!xbt_dynar_compare(
292 (void*)TO_FLOYD_LINK(*src_id, *dst_id)->link_list,
293 (void*)link_route_to_test,
294 (int_f_cpvoid_cpvoid_t) floyd_pointer_resource_cmp),
295 "The route between \"%s\" and \"%s\" already exists", src,dst);
299 if(!route->dst_gateway && !route->src_gateway)
300 XBT_DEBUG("Load Route from \"%s\" to \"%s\"", src, dst);
302 XBT_DEBUG("Load ASroute from \"%s(%s)\" to \"%s(%s)\"", src,
303 route->src_gateway, dst, route->dst_gateway);
304 if(routing_get_network_element_type((const char*)route->dst_gateway) == SURF_NETWORK_ELEMENT_NULL)
305 xbt_die("The dst_gateway '%s' does not exist!",route->dst_gateway);
306 if(routing_get_network_element_type((const char*)route->src_gateway) == SURF_NETWORK_ELEMENT_NULL)
307 xbt_die("The src_gateway '%s' does not exist!",route->src_gateway);
309 TO_FLOYD_LINK(*src_id, *dst_id) =
310 generic_new_extended_route(rc->hierarchy, route, 1);
311 TO_FLOYD_PRED(*src_id, *dst_id) = *src_id;
312 TO_FLOYD_COST(*src_id, *dst_id) =
313 ((TO_FLOYD_LINK(*src_id, *dst_id))->link_list)->used; /* count of links, old model assume 1 */
316 if( A_surfxml_route_symmetrical == A_surfxml_route_symmetrical_YES
317 || A_surfxml_ASroute_symmetrical == A_surfxml_ASroute_symmetrical_YES )
319 if(TO_FLOYD_LINK(*dst_id, *src_id))
321 if(!route->dst_gateway && !route->src_gateway)
322 XBT_DEBUG("See Route from \"%s\" to \"%s\"", dst, src);
324 XBT_DEBUG("See ASroute from \"%s(%s)\" to \"%s(%s)\"", dst,
325 route->src_gateway, src, route->dst_gateway);
328 xbt_dynar_t link_route_to_test = xbt_dynar_new(global_routing->size_of_link, NULL);
329 for(i=xbt_dynar_length(route->link_list) ;i>0 ;i--)
331 link_name = xbt_dynar_get_as(route->link_list,i-1,void *);
332 void *link = xbt_lib_get_or_null(link_lib, link_name, SURF_LINK_LEVEL);
333 xbt_assert(link,"Link : '%s' doesn't exists.",link_name);
334 xbt_dynar_push(link_route_to_test,&link);
336 xbt_assert(!xbt_dynar_compare(
337 (void*)TO_FLOYD_LINK(*dst_id, *src_id)->link_list,
338 (void*)link_route_to_test,
339 (int_f_cpvoid_cpvoid_t) floyd_pointer_resource_cmp),
340 "The route between \"%s\" and \"%s\" already exists", src,dst);
344 if(route->dst_gateway && route->src_gateway)
346 char *gw_src = route->src_gateway;
347 char *gw_dst = route->dst_gateway;
348 route->src_gateway = gw_dst;
349 route->dst_gateway = gw_src;
352 if(!route->dst_gateway && !route->src_gateway)
353 XBT_DEBUG("Load Route from \"%s\" to \"%s\"", dst, src);
355 XBT_DEBUG("Load ASroute from \"%s(%s)\" to \"%s(%s)\"", dst,
356 route->src_gateway, src, route->dst_gateway);
358 TO_FLOYD_LINK(*dst_id, *src_id) =
359 generic_new_extended_route(rc->hierarchy, route, 0);
360 TO_FLOYD_PRED(*dst_id, *src_id) = *dst_id;
361 TO_FLOYD_COST(*dst_id, *src_id) =
362 ((TO_FLOYD_LINK(*dst_id, *src_id))->link_list)->used; /* count of links, old model assume 1 */