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 static XBT_INLINE double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst) {
11 double src_coord, dst_coord;
13 src_coord = xbt_dynar_get_as(src, index, double);
14 dst_coord = xbt_dynar_get_as(dst, index, double);
16 return (src_coord-dst_coord)*(src_coord-dst_coord);
19 static void vivaldi_get_route_and_latency(
20 AS_t rc, const char *src_p, const char *dst_p,
21 route_t route, double *lat)
23 char *src = (char*)src_p;
24 char *dst = (char*)dst_p;
26 if(routing_get_network_element_type(src) == SURF_NETWORK_ELEMENT_AS) {
27 src = route->src_gateway = ROUTER_PEER(src);
28 dst = route->dst_gateway = ROUTER_PEER(dst);
31 double euclidean_dist;
32 xbt_dynar_t src_ctn, dst_ctn;
33 src_ctn = xbt_lib_get_or_null(host_lib, src, COORD_HOST_LEVEL);
34 if(!src_ctn) src_ctn = xbt_lib_get_or_null(as_router_lib, src, COORD_ASR_LEVEL);
35 dst_ctn = xbt_lib_get_or_null(host_lib, dst, COORD_HOST_LEVEL);
36 if(!dst_ctn) dst_ctn = xbt_lib_get_or_null(as_router_lib, dst, COORD_ASR_LEVEL);
38 xbt_assert(src_ctn,"No coordinate found for element '%s'",src);
39 xbt_assert(dst_ctn,"No coordinate found for element '%s'",dst);
41 euclidean_dist = sqrt (euclidean_dist_comp(0,src_ctn,dst_ctn)+euclidean_dist_comp(1,src_ctn,dst_ctn))
42 + fabs(xbt_dynar_get_as(src_ctn, 2, double))+fabs(xbt_dynar_get_as(dst_ctn, 2, double));
45 *lat += euclidean_dist / 1000; //From .ms to .s
50 /* Creation routing model functions */
51 AS_t model_vivaldi_create(void)
53 AS_t new_component = model_rulebased_create();
54 new_component->get_route_and_latency = vivaldi_get_route_and_latency;