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_platf_t routing_platf;
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, sg_routing_edge_t src, sg_routing_edge_t 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);
35 route_t route = xbt_new0(s_route_t, 1);
36 route->link_list = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
39 sg_routing_edge_t src_elm, dst_elm;
40 int table_size = xbt_dynar_length(asg->index_network_elm);
41 for(src=0; src < table_size; src++) {
42 for(dst=0; dst< table_size; dst++) {
43 xbt_dynar_reset(route->link_list);
44 src_elm = xbt_dynar_get_as(asg->index_network_elm,src,sg_routing_edge_t);
45 dst_elm = xbt_dynar_get_as(asg->index_network_elm,dst,sg_routing_edge_t);
46 floyd_get_route_and_latency(asg, src_elm, dst_elm, route, NULL);
48 if (xbt_dynar_length(route->link_list) == 1) {
49 void *link = *(void **) xbt_dynar_get_ptr(route->link_list, 0);
50 onelink_t onelink = xbt_new0(s_onelink_t, 1);
51 onelink->link_ptr = link;
52 if (asg->hierarchy == SURF_ROUTING_BASE) {
53 onelink->src = src_elm;
54 onelink->dst = dst_elm;
55 } else if (asg->hierarchy == SURF_ROUTING_RECURSIVE) {
56 onelink->src = route->src_gateway;
57 onelink->dst = route->dst_gateway;
59 xbt_dynar_push(ret, &onelink);
67 static void floyd_get_route_and_latency(AS_t asg, sg_routing_edge_t src, sg_routing_edge_t dst,
68 route_t res, double *lat)
72 as_floyd_t as = (as_floyd_t)asg;
73 size_t table_size = xbt_dynar_length(asg->index_network_elm);
75 generic_src_dst_check(asg, src, dst);
77 /* create a result route */
78 xbt_dynar_t route_stack = xbt_dynar_new(sizeof(route_t), NULL);
82 pred = TO_FLOYD_PRED(src->id, cur);
84 THROWF(arg_error, 0, "No route from '%s' to '%s'", src->name, dst->name);
85 xbt_dynar_push_as(route_stack, route_t, TO_FLOYD_LINK(pred, cur));
87 } while (cur != src->id);
89 if (asg->hierarchy == SURF_ROUTING_RECURSIVE) {
90 res->src_gateway = xbt_dynar_getlast_as(route_stack, route_t)->src_gateway;
91 res->dst_gateway = xbt_dynar_getfirst_as(route_stack, route_t)->dst_gateway;
94 sg_routing_edge_t prev_dst_gw = NULL;
95 while (!xbt_dynar_is_empty(route_stack)) {
96 route_t e_route = xbt_dynar_pop_as(route_stack, route_t);
98 sg_routing_link_t link;
101 if (asg->hierarchy == SURF_ROUTING_RECURSIVE && prev_dst_gw != NULL
102 && strcmp(prev_dst_gw->name, e_route->src_gateway->name)) {
103 links = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
104 /* Would it be right to pass 'res->link_list' and 'lat' to
105 * routing_get_route_and_latency() here, and avoid the following loop? */
106 routing_get_route_and_latency(prev_dst_gw, e_route->src_gateway,
108 xbt_dynar_foreach(links, cpt, link) {
109 xbt_dynar_push_as(res->link_list, sg_routing_link_t, link);
111 *lat += surf_network_model->extension.network.get_link_latency(link);
113 xbt_dynar_free(&links);
116 links = e_route->link_list;
117 xbt_dynar_foreach(links, cpt, link) {
118 xbt_dynar_push_as(res->link_list, sg_routing_link_t, link);
120 *lat += surf_network_model->extension.network.get_link_latency(link);
123 prev_dst_gw = e_route->dst_gateway;
125 xbt_dynar_free(&route_stack);
128 static void floyd_finalize(AS_t rc)
130 as_floyd_t as = (as_floyd_t) rc;
134 table_size = xbt_dynar_length(as->generic_routing.index_network_elm);
135 /* Delete link_table */
136 for (i = 0; i < table_size; i++)
137 for (j = 0; j < table_size; j++)
138 generic_free_route(TO_FLOYD_LINK(i, j));
139 xbt_free(as->link_table);
140 /* Delete bypass dict */
141 xbt_dict_free(&as->generic_routing.bypassRoutes);
142 /* Delete predecessor and cost table */
143 xbt_free(as->predecessor_table);
144 xbt_free(as->cost_table);
146 model_generic_finalize(rc);
150 AS_t model_floyd_create(void)
152 as_floyd_t new_component = (as_floyd_t)model_generic_create_sized(sizeof(s_as_floyd_t));
153 new_component->generic_routing.parse_route = model_floyd_parse_route;
154 new_component->generic_routing.parse_ASroute = model_floyd_parse_route;
155 new_component->generic_routing.get_route_and_latency = floyd_get_route_and_latency;
156 new_component->generic_routing.get_onelink_routes =
157 floyd_get_onelink_routes;
158 new_component->generic_routing.finalize = floyd_finalize;
159 return (AS_t)new_component;
162 void model_floyd_end(AS_t current_routing)
166 ((as_floyd_t) current_routing);
168 unsigned int i, j, a, b, c;
170 /* set the size of table routing */
171 size_t table_size = xbt_dynar_length(as->generic_routing.index_network_elm);
175 /* Create Cost, Predecessor and Link tables */
176 as->cost_table = xbt_new0(double, table_size * table_size); /* link cost from host to host */
177 as->predecessor_table = xbt_new0(int, table_size * table_size); /* predecessor host numbers */
178 as->link_table = xbt_new0(route_t, table_size * table_size); /* actual link between src and dst */
180 /* Initialize costs and predecessors */
181 for (i = 0; i < table_size; i++)
182 for (j = 0; j < table_size; j++) {
183 TO_FLOYD_COST(i, j) = DBL_MAX;
184 TO_FLOYD_PRED(i, j) = -1;
185 TO_FLOYD_LINK(i, j) = NULL; /* fixed, missing in the previous version */
189 /* Add the loopback if needed */
190 if (routing_platf->loopback && current_routing->hierarchy == SURF_ROUTING_BASE) {
191 for (i = 0; i < table_size; i++) {
192 route_t e_route = TO_FLOYD_LINK(i, i);
194 e_route = xbt_new0(s_route_t, 1);
195 e_route->src_gateway = NULL;
196 e_route->dst_gateway = NULL;
197 e_route->link_list = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
198 xbt_dynar_push(e_route->link_list, &routing_platf->loopback);
199 TO_FLOYD_LINK(i, i) = e_route;
200 TO_FLOYD_PRED(i, i) = i;
201 TO_FLOYD_COST(i, i) = 1;
205 /* Calculate path costs */
206 for (c = 0; c < table_size; c++) {
207 for (a = 0; a < table_size; a++) {
208 for (b = 0; b < table_size; b++) {
209 if (TO_FLOYD_COST(a, c) < DBL_MAX && TO_FLOYD_COST(c, b) < DBL_MAX) {
210 if (TO_FLOYD_COST(a, b) == DBL_MAX ||
211 (TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b) <
212 TO_FLOYD_COST(a, b))) {
213 TO_FLOYD_COST(a, b) =
214 TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b);
215 TO_FLOYD_PRED(a, b) = TO_FLOYD_PRED(c, b);
223 static int floyd_pointer_resource_cmp(const void *a, const void *b) {
227 //FIXME: kill dupplicates in next function with full routing
229 void model_floyd_parse_route(AS_t rc, const char *src,
230 const char *dst, route_t route)
233 as_floyd_t as = (as_floyd_t) rc;
235 /* set the size of table routing */
236 size_t table_size = xbt_dynar_length(rc->index_network_elm);
237 sg_routing_edge_t src_net_elm, dst_net_elm;
239 src_net_elm = sg_routing_edge_by_name_or_null(src);
240 dst_net_elm = sg_routing_edge_by_name_or_null(dst);
242 xbt_assert(src_net_elm, "Network elements %s not found", src);
243 xbt_assert(dst_net_elm, "Network elements %s not found", dst);
248 /* Create Cost, Predecessor and Link tables */
249 as->cost_table = xbt_new0(double, table_size * table_size); /* link cost from host to host */
250 as->predecessor_table = xbt_new0(int, table_size * table_size); /* predecessor host numbers */
251 as->link_table = xbt_new0(route_t, table_size * table_size); /* actual link between src and dst */
253 /* Initialize costs and predecessors */
254 for (i = 0; i < table_size; i++)
255 for (j = 0; j < table_size; j++) {
256 TO_FLOYD_COST(i, j) = DBL_MAX;
257 TO_FLOYD_PRED(i, j) = -1;
258 TO_FLOYD_LINK(i, j) = NULL; /* fixed, missing in the previous version */
261 if(!route->dst_gateway && !route->src_gateway)
262 XBT_DEBUG("Load Route from \"%s\" to \"%s\"", src, dst);
265 XBT_DEBUG("Load ASroute from \"%s(%s)\" to \"%s(%s)\"", src,
266 route->src_gateway->name, dst, route->dst_gateway->name);
267 if(route->dst_gateway->rc_type == SURF_NETWORK_ELEMENT_NULL)
268 xbt_die("The dst_gateway '%s' does not exist!",route->dst_gateway->name);
269 if(route->src_gateway->rc_type == SURF_NETWORK_ELEMENT_NULL)
270 xbt_die("The src_gateway '%s' does not exist!",route->src_gateway->name);
273 if(TO_FLOYD_LINK(src_net_elm->id, dst_net_elm->id))
278 xbt_dynar_t link_route_to_test = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
279 xbt_dynar_foreach(route->link_list,cpt,link_name)
281 void *link = xbt_lib_get_or_null(link_lib, link_name, SURF_LINK_LEVEL);
282 xbt_assert(link,"Link : '%s' doesn't exists.",link_name);
283 xbt_dynar_push(link_route_to_test,&link);
285 xbt_assert(!xbt_dynar_compare(
286 (void*)TO_FLOYD_LINK(src_net_elm->id, dst_net_elm->id)->link_list,
287 (void*)link_route_to_test,
288 (int_f_cpvoid_cpvoid_t) floyd_pointer_resource_cmp),
289 "The route between \"%s\" and \"%s\" already exists", src,dst);
293 TO_FLOYD_LINK(src_net_elm->id, dst_net_elm->id) =
294 generic_new_extended_route(rc->hierarchy, route, 1);
295 TO_FLOYD_PRED(src_net_elm->id, dst_net_elm->id) = src_net_elm->id;
296 TO_FLOYD_COST(src_net_elm->id, dst_net_elm->id) =
297 ((TO_FLOYD_LINK(src_net_elm->id, dst_net_elm->id))->link_list)->used; /* count of links, old model assume 1 */
300 if ( (A_surfxml_route_symmetrical == A_surfxml_route_symmetrical_YES && as_route == 0)
301 || (A_surfxml_ASroute_symmetrical == A_surfxml_ASroute_symmetrical_YES && as_route == 1)
304 if(TO_FLOYD_LINK(dst_net_elm->id, src_net_elm->id))
306 if(!route->dst_gateway && !route->src_gateway)
307 XBT_DEBUG("See Route from \"%s\" to \"%s\"", dst, src);
309 XBT_DEBUG("See ASroute from \"%s(%s)\" to \"%s(%s)\"", dst,
310 route->src_gateway->name, src, route->dst_gateway->name);
313 xbt_dynar_t link_route_to_test = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
314 for(i=xbt_dynar_length(route->link_list) ;i>0 ;i--)
316 link_name = xbt_dynar_get_as(route->link_list,i-1,void *);
317 void *link = xbt_lib_get_or_null(link_lib, link_name, SURF_LINK_LEVEL);
318 xbt_assert(link,"Link : '%s' doesn't exists.",link_name);
319 xbt_dynar_push(link_route_to_test,&link);
321 xbt_assert(!xbt_dynar_compare(
322 (void*)TO_FLOYD_LINK(dst_net_elm->id, src_net_elm->id)->link_list,
323 (void*)link_route_to_test,
324 (int_f_cpvoid_cpvoid_t) floyd_pointer_resource_cmp),
325 "The route between \"%s\" and \"%s\" already exists", src,dst);
329 if(route->dst_gateway && route->src_gateway)
331 sg_routing_edge_t gw_src = route->src_gateway;
332 sg_routing_edge_t gw_dst = route->dst_gateway;
333 route->src_gateway = gw_dst;
334 route->dst_gateway = gw_src;
337 if(!route->dst_gateway && !route->src_gateway)
338 XBT_DEBUG("Load Route from \"%s\" to \"%s\"", dst, src);
340 XBT_DEBUG("Load ASroute from \"%s(%s)\" to \"%s(%s)\"", dst,
341 route->src_gateway->name, src, route->dst_gateway->name);
343 TO_FLOYD_LINK(dst_net_elm->id, src_net_elm->id) =
344 generic_new_extended_route(rc->hierarchy, route, 0);
345 TO_FLOYD_PRED(dst_net_elm->id, src_net_elm->id) = dst_net_elm->id;
346 TO_FLOYD_COST(dst_net_elm->id, src_net_elm->id) =
347 ((TO_FLOYD_LINK(dst_net_elm->id, src_net_elm->id))->link_list)->used; /* count of links, old model assume 1 */