src/surf/surf_routing_cluster.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 #include "xbt/graph.h"
   8
   9 /* Global vars */
  10
  11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_cluster, surf, "Routing part of surf");
  12
  13 /* This routing is specifically setup to represent clusters, aka homogeneous sets of machines
  14  * Note that a router is created, easing the interconnexion with the rest of the world.
  15  */
  16
  17 /* Business methods */
  18 static void cluster_get_route_and_latency(AS_t as,
  19                                           sg_routing_edge_t src,
  20                                           sg_routing_edge_t dst,
  21                                           sg_platf_route_cbarg_t route,
  22                                           double *lat)
  23 {
  24
  25   s_surf_parsing_link_up_down_t info;
  26   XBT_VERB("cluster_get_route_and_latency from '%s'[%d] to '%s'[%d]",
  27             src->name, src->id, dst->name, dst->id);
  28
  29   if (src->rc_type != SURF_NETWORK_ELEMENT_ROUTER) {    // No specific link for router
  30     info =
  31         xbt_dynar_get_as(as->link_up_down_list, src->id,
  32                          s_surf_parsing_link_up_down_t);
  33
  34     if((src->id == dst->id) && info.loopback_link  ){
  35       xbt_dynar_push_as(route->link_list, void *, info.loopback_link);
  36       if (lat)
  37         *lat +=
  38             surf_network_model->extension.network.get_link_latency(info.
  39                                                                    loopback_link);
  40       return;
  41     }
  42
  43
  44     if (info.limiter_link)          // limiter for sender
  45       xbt_dynar_push_as(route->link_list, void *, info.limiter_link);
  46
  47     if (info.link_up) {         // link up
  48       xbt_dynar_push_as(route->link_list, void *, info.link_up);
  49       if (lat)
  50         *lat +=
  51             surf_network_model->extension.network.get_link_latency(info.
  52                                                                    link_up);
  53     }
  54   }
  55
  56   if (((as_cluster_t) as)->backbone) {
  57     xbt_dynar_push_as(route->link_list, void *, ((as_cluster_t) as)->backbone);
  58     if (lat)
  59       *lat +=
  60           surf_network_model->extension.network.
  61           get_link_latency(((as_cluster_t) as)->backbone);
  62   }
  63
  64   if (dst->rc_type != SURF_NETWORK_ELEMENT_ROUTER) {    // No specific link for router
  65     info =
  66         xbt_dynar_get_as(as->link_up_down_list, dst->id,
  67                          s_surf_parsing_link_up_down_t);
  68     if (info.link_down) {       // link down
  69       xbt_dynar_push_as(route->link_list, void *, info.link_down);
  70       if (lat)
  71         *lat +=
  72             surf_network_model->extension.network.get_link_latency(info.
  73                                                                    link_down);
  74     }
  75
  76     if (info.limiter_link)          // limiter for receiver
  77       xbt_dynar_push_as(route->link_list, void *, info.limiter_link);
  78
  79   }
  80 }
  81
  82 static void cluster_get_graph(xbt_graph_t graph, xbt_dict_t nodes,
  83                               xbt_dict_t edges, AS_t rc)
  84 {
  85   int isrc;
  86   int table_size = xbt_dynar_length(rc->index_network_elm);
  87
  88   sg_routing_edge_t src;
  89   xbt_node_t current, previous, backboneNode = NULL, routerNode;
  90   s_surf_parsing_link_up_down_t info;
  91
  92   xbt_assert(((as_cluster_t) rc)->router,"Malformed cluster");
  93
  94   /* create the router */
  95   char *link_name =
  96     ((sg_routing_edge_t) ((as_cluster_t) rc)->router)->name;
  97   routerNode = new_xbt_graph_node(graph, link_name, nodes);
  98
  99   if(((as_cluster_t) rc)->backbone) {
 100     char *link_nameR =
 101       ((surf_resource_t) ((as_cluster_t) rc)->backbone)->name;
 102     backboneNode = new_xbt_graph_node(graph, link_nameR, nodes);
 103
 104     new_xbt_graph_edge(graph, routerNode, backboneNode, edges);
 105   }
 106
 107   for (isrc = 0; isrc < table_size; isrc++) {
 108     src = xbt_dynar_get_as(rc->index_network_elm, isrc, sg_routing_edge_t);
 109
 110     if (src->rc_type != SURF_NETWORK_ELEMENT_ROUTER) {
 111       previous = new_xbt_graph_node(graph, src->name, nodes);
 112
 113       info = xbt_dynar_get_as(rc->link_up_down_list, src->id,
 114                               s_surf_parsing_link_up_down_t);
 115
 116       if (info.link_up) {     // link up
 117
 118         char *link_name = ((surf_resource_t) info.link_up)->name;
 119         current = new_xbt_graph_node(graph, link_name, nodes);
 120         new_xbt_graph_edge(graph, previous, current, edges);
 121
 122         if (((as_cluster_t) rc)->backbone) {
 123           new_xbt_graph_edge(graph, current, backboneNode, edges);
 124         } else {
 125           new_xbt_graph_edge(graph, current, routerNode, edges);
 126         }
 127
 128       }
 129
 130       if (info.link_down) {    // link down
 131         char *link_name = ((surf_resource_t) info.link_down)->name;
 132         current = new_xbt_graph_node(graph, link_name, nodes);
 133         new_xbt_graph_edge(graph, previous, current, edges);
 134
 135         if (((as_cluster_t) rc)->backbone) {
 136           new_xbt_graph_edge(graph, current, backboneNode, edges);
 137         } else {
 138           new_xbt_graph_edge(graph, current, routerNode, edges);
 139         }
 140       }
 141     }
 142
 143   }
 144 }
 145
 146 static void model_cluster_finalize(AS_t as)
 147 {
 148   model_none_finalize(as);
 149 }
 150
 151 static int cluster_parse_PU(AS_t rc, sg_routing_edge_t elm) {
 152   XBT_DEBUG("Load process unit \"%s\"", elm->name);
 153   xbt_dynar_push_as(rc->index_network_elm,sg_routing_edge_t,elm);
 154   return xbt_dynar_length(rc->index_network_elm)-1;
 155 }
 156
 157 static int cluster_parse_AS(AS_t rc, sg_routing_edge_t elm) {
 158   XBT_DEBUG("Load Autonomous system \"%s\"", elm->name);
 159   xbt_dynar_push_as(rc->index_network_elm,sg_routing_edge_t,elm);
 160   return xbt_dynar_length(rc->index_network_elm)-1;
 161 }
 162
 163 /* Creation routing model functions */
 164 AS_t model_cluster_create(void)
 165 {
 166   AS_t result = model_none_create_sized(sizeof(s_as_cluster_t));
 167   result->get_route_and_latency = cluster_get_route_and_latency;
 168   result->finalize = model_cluster_finalize;
 169   result->get_graph = cluster_get_graph;
 170   result->parse_AS = cluster_parse_AS;
 171   result->parse_PU = cluster_parse_PU;
 172
 173   return (AS_t) result;
 174 }