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 void vivaldi_get_route(AS_t rc, const char *src, const char *dst,
16 "Invalid params for \"get_route\" function at AS \"%s\"",
19 route->src_gateway = ROUTER_PEER(src);
20 route->dst_gateway = ROUTER_PEER(dst);
23 static XBT_INLINE double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst)
25 double src_coord, dst_coord;
27 src_coord = xbt_dynar_get_as(src, index, double);
28 dst_coord = xbt_dynar_get_as(dst, index, double);
30 return (src_coord-dst_coord)*(src_coord-dst_coord);
34 static double base_vivaldi_get_latency (const char *src, const char *dst)
36 double euclidean_dist;
37 xbt_dynar_t src_ctn, dst_ctn;
38 src_ctn = xbt_lib_get_or_null(host_lib, src, COORD_HOST_LEVEL);
39 if(!src_ctn) src_ctn = xbt_lib_get_or_null(as_router_lib, src, COORD_ASR_LEVEL);
40 dst_ctn = xbt_lib_get_or_null(host_lib, dst, COORD_HOST_LEVEL);
41 if(!dst_ctn) dst_ctn = xbt_lib_get_or_null(as_router_lib, dst, COORD_ASR_LEVEL);
43 if(dst_ctn == NULL || src_ctn == NULL)
44 xbt_die("Coord src '%s' :%p dst '%s' :%p",src,src_ctn,dst,dst_ctn);
46 euclidean_dist = sqrt (euclidean_dist_comp(0,src_ctn,dst_ctn)+euclidean_dist_comp(1,src_ctn,dst_ctn))
47 + fabs(xbt_dynar_get_as(src_ctn, 2, double))+fabs(xbt_dynar_get_as(dst_ctn, 2, double));
50 return euclidean_dist / 1000;
53 static double vivaldi_get_latency (AS_t rc,const char *src, const char *dst, route_t e_route)
55 if(routing_get_network_element_type(src) == SURF_NETWORK_ELEMENT_AS) {
57 return base_vivaldi_get_latency(e_route->src_gateway,e_route->dst_gateway);
58 return base_vivaldi_get_latency(ROUTER_PEER(src),ROUTER_PEER(dst));
60 return base_vivaldi_get_latency(src,dst);
64 /* Creation routing model functions */
65 AS_t model_vivaldi_create(void)
67 AS_t new_component = model_rulebased_create();
68 new_component->get_route = vivaldi_get_route;
69 new_component->get_latency = vivaldi_get_latency;