src/surf/surf_routing_vivaldi.c

   1 /* Copyright (c) 2009-2013. 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 #include "surf_routing_private.h"
   7
   8 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_vivaldi, surf, "Routing part of surf");
   9
  10 static XBT_INLINE double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst) {
  11   double src_coord, dst_coord;
  12
  13   src_coord = xbt_dynar_get_as(src, index, double);
  14   dst_coord = xbt_dynar_get_as(dst, index, double);
  15
  16   return (src_coord-dst_coord)*(src_coord-dst_coord);
  17 }
  18
  19 static void vivaldi_get_route_and_latency(
  20     AS_t rc, sg_routing_edge_t src_p, sg_routing_edge_t dst_p,
  21     sg_platf_route_cbarg_t route, double *lat)
  22 {
  23   s_surf_parsing_link_up_down_t info;
  24
  25   XBT_DEBUG("vivaldi_get_route_and_latency from '%s'[%d] '%s'[%d]",src_p->name,src_p->id,dst_p->name,dst_p->id);
  26   char *src = (char*)src_p->name;
  27   char *dst = (char*)dst_p->name;
  28
  29   if(src_p->rc_type == SURF_NETWORK_ELEMENT_AS) {
  30     char *rp_src = ROUTER_PEER(src);
  31     char *rp_dst = ROUTER_PEER(dst);
  32     route->gw_src = xbt_lib_get_or_null(as_router_lib, rp_src,
  33                                         ROUTING_ASR_LEVEL);
  34     route->gw_dst = xbt_lib_get_or_null(as_router_lib, rp_dst,
  35                                         ROUTING_ASR_LEVEL);
  36     xbt_free(rp_src);
  37     xbt_free(rp_dst);
  38   }
  39
  40   double euclidean_dist;
  41   xbt_dynar_t src_ctn, dst_ctn;
  42   char *tmp_src_name, *tmp_dst_name;
  43
  44   if(src_p->rc_type == SURF_NETWORK_ELEMENT_HOST){
  45     tmp_src_name = HOST_PEER(src);
  46
  47     if(rc->link_up_down_list){
  48       info = xbt_dynar_get_as(rc->link_up_down_list,src_p->id,s_surf_parsing_link_up_down_t);
  49       if(info.link_up) { // link up
  50         xbt_dynar_push_as(route->link_list,void*,info.link_up);
  51         if (lat)
  52           *lat += surf_network_model->extension.network.get_link_latency(info.link_up);
  53       }
  54     }
  55     src_ctn = xbt_lib_get_or_null(host_lib, tmp_src_name, COORD_HOST_LEVEL);
  56     if(!src_ctn ) src_ctn = xbt_lib_get_or_null(host_lib, src, COORD_HOST_LEVEL);
  57   }
  58   else if(src_p->rc_type == SURF_NETWORK_ELEMENT_ROUTER || src_p->rc_type == SURF_NETWORK_ELEMENT_AS){
  59     tmp_src_name = ROUTER_PEER(src);
  60     src_ctn = xbt_lib_get_or_null(as_router_lib, tmp_src_name, COORD_ASR_LEVEL);
  61   }
  62   else{
  63     THROW_IMPOSSIBLE;
  64   }
  65
  66   if(dst_p->rc_type == SURF_NETWORK_ELEMENT_HOST){
  67     tmp_dst_name = HOST_PEER(dst);
  68
  69     if(rc->link_up_down_list){
  70       info = xbt_dynar_get_as(rc->link_up_down_list,dst_p->id,s_surf_parsing_link_up_down_t);
  71       if(info.link_down) { // link down
  72         xbt_dynar_push_as(route->link_list,void*,info.link_down);
  73         if (lat)
  74           *lat += surf_network_model->extension.network.get_link_latency(info.link_down);
  75       }
  76     }
  77     dst_ctn = xbt_lib_get_or_null(host_lib, tmp_dst_name, COORD_HOST_LEVEL);
  78     if(!dst_ctn ) dst_ctn = xbt_lib_get_or_null(host_lib, dst, COORD_HOST_LEVEL);
  79   }
  80   else if(dst_p->rc_type == SURF_NETWORK_ELEMENT_ROUTER || dst_p->rc_type == SURF_NETWORK_ELEMENT_AS){
  81     tmp_dst_name = ROUTER_PEER(dst);
  82     dst_ctn = xbt_lib_get_or_null(as_router_lib, tmp_dst_name, COORD_ASR_LEVEL);
  83   }
  84   else{
  85     THROW_IMPOSSIBLE;
  86   }
  87
  88   xbt_assert(src_ctn,"No coordinate found for element '%s'",tmp_src_name);
  89   xbt_assert(dst_ctn,"No coordinate found for element '%s'",tmp_dst_name);
  90   free(tmp_src_name);
  91   free(tmp_dst_name);
  92
  93   euclidean_dist = sqrt (euclidean_dist_comp(0,src_ctn,dst_ctn)+euclidean_dist_comp(1,src_ctn,dst_ctn))
  94                       + fabs(xbt_dynar_get_as(src_ctn, 2, double))+fabs(xbt_dynar_get_as(dst_ctn, 2, double));
  95
  96   if (lat){
  97     XBT_DEBUG("Updating latency %f += %f",*lat,euclidean_dist);
  98     *lat += euclidean_dist / 1000.0; //From .ms to .s
  99   }
 100 }
 101
 102 static int vivaldi_parse_PU(AS_t rc, sg_routing_edge_t elm) {
 103   XBT_DEBUG("Load process unit \"%s\"", elm->name);
 104   xbt_dynar_push_as(rc->index_network_elm,sg_routing_edge_t,elm);
 105   return xbt_dynar_length(rc->index_network_elm)-1;
 106 }
 107
 108 /* Creation routing model functions */
 109 AS_t model_vivaldi_create(void)
 110 {
 111   AS_t new_component = model_generic_create_sized(sizeof *new_component);
 112
 113   new_component->get_route_and_latency = vivaldi_get_route_and_latency;
 114   new_component->parse_PU = vivaldi_parse_PU;
 115   new_component->get_graph = generic_get_graph;
 116   return new_component;
 117 }