src/surf/surf_routing_vivaldi.cpp

   1 /* Copyright (c) 2013-2015. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   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
   7 #include "surf_routing_vivaldi.hpp"
   8 #include "network_interface.hpp"
   9
  10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_vivaldi, surf, "Routing part of surf");
  11
  12 static XBT_INLINE double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst) {
  13   double src_coord, dst_coord;
  14
  15   src_coord = xbt_dynar_get_as(src, index, double);
  16   dst_coord = xbt_dynar_get_as(dst, index, double);
  17
  18   return (src_coord-dst_coord)*(src_coord-dst_coord);
  19 }
  20
  21 AS_t model_vivaldi_create(void)
  22 {
  23   return new simgrid::surf::AsVivaldi();
  24 }
  25
  26 namespace simgrid {
  27 namespace surf {
  28
  29 void AsVivaldi::getRouteAndLatency(RoutingEdge *src, RoutingEdge *dst, sg_platf_route_cbarg_t route, double *lat)
  30 {
  31   s_surf_parsing_link_up_down_t info;
  32
  33   XBT_DEBUG("vivaldi_get_route_and_latency from '%s'[%d] '%s'[%d]",
  34                   src->getName(), src->getId(), dst->getName(), dst->getId());
  35
  36   if(src->getRcType() == SURF_NETWORK_ELEMENT_AS) {
  37     char *src_name = ROUTER_PEER(src->getName());
  38     char *dst_name = ROUTER_PEER(dst->getName());
  39     route->gw_src = (sg_routing_edge_t) xbt_lib_get_or_null(as_router_lib, src_name, ROUTING_ASR_LEVEL);
  40     route->gw_dst = (sg_routing_edge_t) xbt_lib_get_or_null(as_router_lib, dst_name, ROUTING_ASR_LEVEL);
  41     xbt_free(src_name);
  42     xbt_free(dst_name);
  43   }
  44
  45   double euclidean_dist;
  46   xbt_dynar_t src_ctn, dst_ctn;
  47   char *tmp_src_name, *tmp_dst_name;
  48
  49   if(src->getRcType() == SURF_NETWORK_ELEMENT_HOST){
  50     tmp_src_name = HOST_PEER(src->getName());
  51
  52     if(p_linkUpDownList){
  53       info = xbt_dynar_get_as(p_linkUpDownList, src->getId(), s_surf_parsing_link_up_down_t);
  54       if(info.link_up) { // link up
  55         xbt_dynar_push_as(route->link_list, void*, info.link_up);
  56         if (lat)
  57           *lat += static_cast<Link*>(info.link_up)->getLatency();
  58       }
  59     }
  60     src_ctn = (xbt_dynar_t) simgrid::Host::by_name_or_create(tmp_src_name)->facet(COORD_HOST_LEVEL);
  61     if (src_ctn == nullptr)
  62       src_ctn = (xbt_dynar_t) simgrid::Host::by_name_or_create(src->getName())->facet(COORD_HOST_LEVEL);
  63   }
  64   else if(src->getRcType() == SURF_NETWORK_ELEMENT_ROUTER || src->getRcType() == SURF_NETWORK_ELEMENT_AS){
  65     tmp_src_name = ROUTER_PEER(src->getName());
  66     src_ctn = (xbt_dynar_t) xbt_lib_get_or_null(as_router_lib, tmp_src_name, COORD_ASR_LEVEL);
  67   }
  68   else{
  69     THROW_IMPOSSIBLE;
  70   }
  71
  72   if(dst->getRcType() == SURF_NETWORK_ELEMENT_HOST){
  73     tmp_dst_name = HOST_PEER(dst->getName());
  74
  75     if(p_linkUpDownList){
  76       info = xbt_dynar_get_as(p_linkUpDownList, dst->getId(), s_surf_parsing_link_up_down_t);
  77       if(info.link_down) { // link down
  78         xbt_dynar_push_as(route->link_list,void*,info.link_down);
  79         if (lat)
  80           *lat += static_cast<Link*>(info.link_down)->getLatency();
  81       }
  82     }
  83     dst_ctn = (xbt_dynar_t) simgrid::Host::by_name_or_create(tmp_dst_name)
  84       ->facet(COORD_HOST_LEVEL);
  85     if (dst_ctn == nullptr)
  86       dst_ctn = (xbt_dynar_t) simgrid::Host::by_name_or_create(dst->getName())
  87         ->facet(COORD_HOST_LEVEL);
  88   }
  89   else if(dst->getRcType() == SURF_NETWORK_ELEMENT_ROUTER || dst->getRcType() == SURF_NETWORK_ELEMENT_AS){
  90     tmp_dst_name = ROUTER_PEER(dst->getName());
  91     dst_ctn = (xbt_dynar_t) xbt_lib_get_or_null(as_router_lib, tmp_dst_name, COORD_ASR_LEVEL);
  92   }
  93   else{
  94     THROW_IMPOSSIBLE;
  95   }
  96
  97   xbt_assert(src_ctn,"No coordinate found for element '%s'",tmp_src_name);
  98   xbt_assert(dst_ctn,"No coordinate found for element '%s'",tmp_dst_name);
  99   free(tmp_src_name);
 100   free(tmp_dst_name);
 101
 102   euclidean_dist = sqrt (euclidean_dist_comp(0,src_ctn,dst_ctn)+euclidean_dist_comp(1,src_ctn,dst_ctn))
 103                       + fabs(xbt_dynar_get_as(src_ctn, 2, double))+fabs(xbt_dynar_get_as(dst_ctn, 2, double));
 104
 105   if (lat){
 106     XBT_DEBUG("Updating latency %f += %f",*lat,euclidean_dist);
 107     *lat += euclidean_dist / 1000.0; //From .ms to .s
 108   }
 109 }
 110
 111 int AsVivaldi::parsePU(RoutingEdge *elm) {
 112   XBT_DEBUG("Load process unit \"%s\"", elm->getName());
 113   xbt_dynar_push_as(p_indexNetworkElm, sg_routing_edge_t, elm);
 114   return xbt_dynar_length(p_indexNetworkElm)-1;
 115 }
 116
 117 }
 118 }