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. */
6 #include "surf_routing_private.h"
8 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_vivaldi, surf, "Routing part of surf");
10 /* Business methods */
11 static route_t vivaldi_get_route(AS_t rc, const char *src, const char *dst)
15 "Invalid params for \"get_route\" function at AS \"%s\"",
18 route_t new_e_route = xbt_new0(s_route_t, 1);
19 new_e_route->src_gateway = ROUTER_PEER(src);
20 new_e_route->dst_gateway = ROUTER_PEER(dst);
21 new_e_route->link_list = xbt_dynar_new(0, NULL);
25 static double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst)
27 double src_coord, dst_coord;
29 src_coord = atof(xbt_dynar_get_as(src, index, char *));
30 dst_coord = atof(xbt_dynar_get_as(dst, index, char *));
32 return (src_coord-dst_coord)*(src_coord-dst_coord);
36 static double base_vivaldi_get_latency (const char *src, const char *dst)
38 double euclidean_dist;
39 xbt_dynar_t src_ctn, dst_ctn;
40 src_ctn = xbt_lib_get_or_null(host_lib, src, COORD_HOST_LEVEL);
41 if(!src_ctn) src_ctn = xbt_lib_get_or_null(as_router_lib, src, COORD_ASR_LEVEL);
42 dst_ctn = xbt_lib_get_or_null(host_lib, dst, COORD_HOST_LEVEL);
43 if(!dst_ctn) dst_ctn = xbt_lib_get_or_null(as_router_lib, dst, COORD_ASR_LEVEL);
45 if(dst_ctn == NULL || src_ctn == NULL)
46 xbt_die("Coord src '%s' :%p dst '%s' :%p",src,src_ctn,dst,dst_ctn);
48 euclidean_dist = sqrt (euclidean_dist_comp(0,src_ctn,dst_ctn)+euclidean_dist_comp(1,src_ctn,dst_ctn))
49 + fabs(atof(xbt_dynar_get_as(src_ctn, 2, char *)))+fabs(atof(xbt_dynar_get_as(dst_ctn, 2, char *)));
51 xbt_assert(euclidean_dist>=0, "Euclidean Dist is less than 0\"%s\" and \"%.2f\"", src, euclidean_dist);
54 return euclidean_dist / 1000;
57 static double vivaldi_get_link_latency (AS_t rc,const char *src, const char *dst, route_t e_route)
59 if(routing_get_network_element_type(src) == SURF_NETWORK_ELEMENT_AS) {
60 int need_to_clean = e_route?0:1;
62 e_route = e_route ? e_route : rc->get_route(rc, src, dst);
63 latency = base_vivaldi_get_latency(e_route->src_gateway,e_route->dst_gateway);
64 if(need_to_clean) generic_free_route(e_route);
67 return base_vivaldi_get_latency(src,dst);
71 /* Creation routing model functions */
72 AS_t model_vivaldi_create(void)
74 AS_t new_component = model_rulebased_create();
75 new_component->get_route = vivaldi_get_route;
76 new_component->get_latency = vivaldi_get_link_latency;