1 /* Copyright (c) 2013-2016. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "src/surf/AsVivaldi.hpp"
7 #include "src/surf/network_interface.hpp"
9 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_vivaldi, surf, "Routing part of surf");
13 static inline double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst) {
14 double src_coord = xbt_dynar_get_as(src, index, double);
15 double dst_coord = xbt_dynar_get_as(dst, index, double);
17 return (src_coord-dst_coord)*(src_coord-dst_coord);
20 static xbt_dynar_t getCoordsFromNetcard(NetCard *nc)
22 xbt_dynar_t res = nullptr;
26 tmp_name = bprintf("peer_%s", nc->name());
27 simgrid::s4u::Host *host = simgrid::s4u::Host::by_name_or_null(tmp_name);
29 host = simgrid::s4u::Host::by_name_or_null(nc->name());
31 res = (xbt_dynar_t) host->extension(COORD_HOST_LEVEL);
33 else if(nc->isRouter() || nc->isAS()){
34 tmp_name = bprintf("router_%s", nc->name());
35 res = (xbt_dynar_t) xbt_lib_get_or_null(as_router_lib, tmp_name, COORD_ASR_LEVEL);
41 xbt_assert(res,"No coordinate found for element '%s'",tmp_name);
46 AsVivaldi::AsVivaldi(const char *name)
50 void AsVivaldi::getRouteAndLatency(NetCard *src, NetCard *dst, sg_platf_route_cbarg_t route, double *lat)
52 XBT_DEBUG("vivaldi_get_route_and_latency from '%s'[%d] '%s'[%d]", src->name(), src->id(), dst->name(), dst->id());
55 char *src_name = bprintf("router_%s",src->name());
56 char *dst_name = bprintf("router_%s",dst->name());
57 route->gw_src = (sg_netcard_t) xbt_lib_get_or_null(as_router_lib, src_name, ROUTING_ASR_LEVEL);
58 route->gw_dst = (sg_netcard_t) xbt_lib_get_or_null(as_router_lib, dst_name, ROUTING_ASR_LEVEL);
63 /* Retrieve the private links */
64 if ((int)xbt_dynar_length(privateLinks_) > src->id()) {
65 s_surf_parsing_link_up_down_t info = xbt_dynar_get_as(privateLinks_, src->id(), s_surf_parsing_link_up_down_t);
67 route->link_list->push_back(info.link_up);
69 *lat += info.link_up->getLatency();
72 if ((int)xbt_dynar_length(privateLinks_)>dst->id()) {
73 s_surf_parsing_link_up_down_t info = xbt_dynar_get_as(privateLinks_, dst->id(), s_surf_parsing_link_up_down_t);
75 route->link_list->push_back(info.link_down);
77 *lat += info.link_down->getLatency();
81 /* Compute the extra latency due to the euclidean distance if needed */
83 xbt_dynar_t srcCoords = getCoordsFromNetcard(src);
84 xbt_dynar_t dstCoords = getCoordsFromNetcard(dst);
86 double euclidean_dist = sqrt (euclidean_dist_comp(0,srcCoords,dstCoords)+euclidean_dist_comp(1,srcCoords,dstCoords))
87 + fabs(xbt_dynar_get_as(srcCoords, 2, double))+fabs(xbt_dynar_get_as(dstCoords, 2, double));
89 XBT_DEBUG("Updating latency %f += %f",*lat,euclidean_dist);
90 *lat += euclidean_dist / 1000.0; //From .ms to .s