X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/8c272bc83bed049c84b9eb1155edbc1d01baaafb..831de10adaaf8910940aa280e2ac2dd075b5ffe5:/src/kernel/routing/AsVivaldi.cpp

diff --git a/src/kernel/routing/AsVivaldi.cpp b/src/kernel/routing/AsVivaldi.cpp
new file mode 100644
index 0000000000..964ee76c36
--- /dev/null
+++ b/src/kernel/routing/AsVivaldi.cpp
@@ -0,0 +1,101 @@
+/* Copyright (c) 2013-2016. The SimGrid Team. All rights reserved.         */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include <xbt/dynar.h>
+
+#include <simgrid/s4u/host.hpp>
+
+#include "src/kernel/routing/AsVivaldi.hpp"
+#include "src/surf/network_interface.hpp"
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_vivaldi, surf, "Routing part of surf");
+
+namespace simgrid {
+namespace routing {
+  static inline double euclidean_dist_comp(int index, xbt_dynar_t src, xbt_dynar_t dst) {
+    double src_coord = xbt_dynar_get_as(src, index, double);
+    double dst_coord = xbt_dynar_get_as(dst, index, double);
+
+    return (src_coord-dst_coord)*(src_coord-dst_coord);
+  }
+
+  static xbt_dynar_t getCoordsFromNetcard(NetCard *nc)
+  {
+    xbt_dynar_t res = nullptr;
+    char *tmp_name;
+
+    if(nc->isHost()){
+      tmp_name = bprintf("peer_%s", nc->name());
+      simgrid::s4u::Host *host = simgrid::s4u::Host::by_name_or_null(tmp_name);
+      if (host == nullptr)
+        host = simgrid::s4u::Host::by_name_or_null(nc->name());
+      if (host != nullptr)
+        res = (xbt_dynar_t) host->extension(COORD_HOST_LEVEL);
+    }
+    else if(nc->isRouter() || nc->isAS()){
+      tmp_name = bprintf("router_%s", nc->name());
+      res = (xbt_dynar_t) xbt_lib_get_or_null(as_router_lib, tmp_name, COORD_ASR_LEVEL);
+    }
+    else{
+      THROW_IMPOSSIBLE;
+    }
+
+    xbt_assert(res,"No coordinate found for element '%s'",tmp_name);
+    free(tmp_name);
+
+    return res;
+  }
+  AsVivaldi::AsVivaldi(const char *name)
+    : AsCluster(name)
+  {}
+
+AsVivaldi::~AsVivaldi() {}
+
+void AsVivaldi::getRouteAndLatency(NetCard *src, NetCard *dst, sg_platf_route_cbarg_t route, double *lat)
+{
+  XBT_DEBUG("vivaldi_get_route_and_latency from '%s'[%d] '%s'[%d]", src->name(), src->id(), dst->name(), dst->id());
+
+  if(src->isAS()) {
+    char *src_name = bprintf("router_%s",src->name());
+    char *dst_name = bprintf("router_%s",dst->name());
+    route->gw_src = (sg_netcard_t) xbt_lib_get_or_null(as_router_lib, src_name, ROUTING_ASR_LEVEL);
+    route->gw_dst = (sg_netcard_t) xbt_lib_get_or_null(as_router_lib, dst_name, ROUTING_ASR_LEVEL);
+    xbt_free(src_name);
+    xbt_free(dst_name);
+  }
+
+  /* Retrieve the private links */
+  if ((int)xbt_dynar_length(privateLinks_) > src->id()) {
+    s_surf_parsing_link_up_down_t info = xbt_dynar_get_as(privateLinks_, src->id(), s_surf_parsing_link_up_down_t);
+    if(info.linkUp) {
+      route->link_list->push_back(info.linkUp);
+      if (lat)
+        *lat += info.linkUp->getLatency();
+    }
+  }
+  if ((int)xbt_dynar_length(privateLinks_)>dst->id()) {
+    s_surf_parsing_link_up_down_t info = xbt_dynar_get_as(privateLinks_, dst->id(), s_surf_parsing_link_up_down_t);
+    if(info.linkDown) {
+      route->link_list->push_back(info.linkDown);
+      if (lat)
+        *lat += info.linkDown->getLatency();
+    }
+  }
+
+  /* Compute the extra latency due to the euclidean distance if needed */
+  if (lat){
+    xbt_dynar_t srcCoords = getCoordsFromNetcard(src);
+    xbt_dynar_t dstCoords = getCoordsFromNetcard(dst);
+
+    double euclidean_dist = sqrt (euclidean_dist_comp(0,srcCoords,dstCoords)+euclidean_dist_comp(1,srcCoords,dstCoords))
+                              + fabs(xbt_dynar_get_as(srcCoords, 2, double))+fabs(xbt_dynar_get_as(dstCoords, 2, double));
+
+    XBT_DEBUG("Updating latency %f += %f",*lat,euclidean_dist);
+    *lat += euclidean_dist / 1000.0; //From .ms to .s
+  }
+}
+
+}
+}