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. */
8 #include <simgrid/s4u/host.hpp>
10 #include "src/surf/AsVivaldi.hpp"
11 #include "src/surf/network_interface.hpp"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_vivaldi, surf, "Routing part of surf");
17 static inline double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst) {
18 double src_coord = xbt_dynar_get_as(src, index, double);
19 double dst_coord = xbt_dynar_get_as(dst, index, double);
21 return (src_coord-dst_coord)*(src_coord-dst_coord);
24 static xbt_dynar_t getCoordsFromNetcard(NetCard *nc)
26 xbt_dynar_t res = nullptr;
30 tmp_name = bprintf("peer_%s", nc->name());
31 simgrid::s4u::Host *host = simgrid::s4u::Host::by_name_or_null(tmp_name);
33 host = simgrid::s4u::Host::by_name_or_null(nc->name());
35 res = (xbt_dynar_t) host->extension(COORD_HOST_LEVEL);
37 else if(nc->isRouter() || nc->isAS()){
38 tmp_name = bprintf("router_%s", nc->name());
39 res = (xbt_dynar_t) xbt_lib_get_or_null(as_router_lib, tmp_name, COORD_ASR_LEVEL);
45 xbt_assert(res,"No coordinate found for element '%s'",tmp_name);
50 AsVivaldi::AsVivaldi(const char *name)
54 AsVivaldi::~AsVivaldi() {}
56 void AsVivaldi::getRouteAndLatency(NetCard *src, NetCard *dst, sg_platf_route_cbarg_t route, double *lat)
58 XBT_DEBUG("vivaldi_get_route_and_latency from '%s'[%d] '%s'[%d]", src->name(), src->id(), dst->name(), dst->id());
61 char *src_name = bprintf("router_%s",src->name());
62 char *dst_name = bprintf("router_%s",dst->name());
63 route->gw_src = (sg_netcard_t) xbt_lib_get_or_null(as_router_lib, src_name, ROUTING_ASR_LEVEL);
64 route->gw_dst = (sg_netcard_t) xbt_lib_get_or_null(as_router_lib, dst_name, ROUTING_ASR_LEVEL);
69 /* Retrieve the private links */
70 if ((int)xbt_dynar_length(privateLinks_) > src->id()) {
71 s_surf_parsing_link_up_down_t info = xbt_dynar_get_as(privateLinks_, src->id(), s_surf_parsing_link_up_down_t);
73 route->link_list->push_back(info.linkUp);
75 *lat += info.linkUp->getLatency();
78 if ((int)xbt_dynar_length(privateLinks_)>dst->id()) {
79 s_surf_parsing_link_up_down_t info = xbt_dynar_get_as(privateLinks_, dst->id(), s_surf_parsing_link_up_down_t);
81 route->link_list->push_back(info.linkDown);
83 *lat += info.linkDown->getLatency();
87 /* Compute the extra latency due to the euclidean distance if needed */
89 xbt_dynar_t srcCoords = getCoordsFromNetcard(src);
90 xbt_dynar_t dstCoords = getCoordsFromNetcard(dst);
92 double euclidean_dist = sqrt (euclidean_dist_comp(0,srcCoords,dstCoords)+euclidean_dist_comp(1,srcCoords,dstCoords))
93 + fabs(xbt_dynar_get_as(srcCoords, 2, double))+fabs(xbt_dynar_get_as(dstCoords, 2, double));
95 XBT_DEBUG("Updating latency %f += %f",*lat,euclidean_dist);
96 *lat += euclidean_dist / 1000.0; //From .ms to .s