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/kernel/routing/AsVivaldi.hpp"
11 #include "src/kernel/routing/NetCard.hpp"
12 #include "src/surf/network_interface.hpp"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_vivaldi, surf, "Routing part of surf");
20 simgrid::xbt::Extension<NetCard, Coords> Coords::EXTENSION_ID;
22 Coords::Coords(NetCard* netcard, const char* coordStr)
24 if (!Coords::EXTENSION_ID.valid())
25 Coords::EXTENSION_ID = NetCard::extension_create<Coords>();
30 xbt_dynar_t ctn_str = xbt_str_split_str(coordStr, " ");
31 xbt_assert(xbt_dynar_length(ctn_str) == 3, "Coordinates of %s must have 3 dimensions", netcard->cname());
33 this->coords = xbt_dynar_new(sizeof(double), nullptr);
34 xbt_dynar_foreach (ctn_str, cursor, str) {
35 double val = xbt_str_parse_double(str, "Invalid coordinate: %s");
36 xbt_dynar_push(this->coords, &val);
38 xbt_dynar_free(&ctn_str);
39 xbt_dynar_shrink(this->coords, 0);
40 netcard->extension_set<Coords>(this);
41 XBT_DEBUG("Coords of %s %p: %s", netcard->cname(), netcard, coordStr);
45 xbt_dynar_free(&coords);
47 }; // namespace vivaldi
49 static inline double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst)
51 double src_coord = xbt_dynar_get_as(src, index, double);
52 double dst_coord = xbt_dynar_get_as(dst, index, double);
54 return (src_coord - dst_coord) * (src_coord - dst_coord);
57 static xbt_dynar_t getCoordsFromNetcard(NetCard* nc)
59 simgrid::kernel::routing::vivaldi::Coords* coords = nc->extension<simgrid::kernel::routing::vivaldi::Coords>();
60 xbt_assert(coords, "Please specify the Vivaldi coordinates of %s %s (%p)",
61 (nc->isAS() ? "AS" : (nc->isHost() ? "Host" : "Router")), nc->cname(), nc);
62 return coords->coords;
64 AsVivaldi::AsVivaldi(As* father, const char* name) : AsCluster(father, name)
68 void AsVivaldi::getLocalRoute(NetCard* src, NetCard* dst, sg_platf_route_cbarg_t route, double* lat)
70 XBT_DEBUG("vivaldi getLocalRoute from '%s'[%d] '%s'[%d]", src->cname(), src->id(), dst->cname(), dst->id());
73 char* srcName = bprintf("router_%s", src->cname());
74 char* dstName = bprintf("router_%s", dst->cname());
75 route->gw_src = (sg_netcard_t)xbt_lib_get_or_null(as_router_lib, srcName, ROUTING_ASR_LEVEL);
76 route->gw_dst = (sg_netcard_t)xbt_lib_get_or_null(as_router_lib, dstName, ROUTING_ASR_LEVEL);
81 /* Retrieve the private links */
82 if (privateLinks_.size() > src->id()) {
83 s_surf_parsing_link_up_down_t info = privateLinks_.at(src->id());
85 route->link_list->push_back(info.linkUp);
87 *lat += info.linkUp->latency();
90 if (privateLinks_.size() > dst->id()) {
91 s_surf_parsing_link_up_down_t info = privateLinks_.at(dst->id());
93 route->link_list->push_back(info.linkDown);
95 *lat += info.linkDown->latency();
99 /* Compute the extra latency due to the euclidean distance if needed */
101 xbt_dynar_t srcCoords = getCoordsFromNetcard(src);
102 xbt_dynar_t dstCoords = getCoordsFromNetcard(dst);
104 double euclidean_dist =
105 sqrt(euclidean_dist_comp(0, srcCoords, dstCoords) + euclidean_dist_comp(1, srcCoords, dstCoords)) +
106 fabs(xbt_dynar_get_as(srcCoords, 2, double)) + fabs(xbt_dynar_get_as(dstCoords, 2, double));
108 XBT_DEBUG("Updating latency %f += %f", *lat, euclidean_dist);
109 *lat += euclidean_dist / 1000.0; // From .ms to .s