sealed_ = true;
}
+ /** @brief Get the common ancestor and its first childs in each line leading to src and dst */
+ static void find_common_ancestors(NetCard *src, NetCard *dst,
+ /* OUT */ As **common_ancestor, As **src_ancestor, As **dst_ancestor)
+ {
+ #define ROUTING_HIERARCHY_MAXDEPTH 32 /* increase if it is not enough */
+ simgrid::surf::As *path_src[ROUTING_HIERARCHY_MAXDEPTH];
+ simgrid::surf::As *path_dst[ROUTING_HIERARCHY_MAXDEPTH];
+ int index_src = 0;
+ int index_dst = 0;
+ simgrid::surf::As *current_src;
+ simgrid::surf::As *current_dst;
+ simgrid::surf::As *father;
+
+ /* (1) find the path to root of src and dst*/
+ simgrid::surf::As *src_as = src->containingAS();
+ simgrid::surf::As *dst_as = dst->containingAS();
+
+ xbt_assert(src_as, "Host %s must be in an AS", src->name());
+ xbt_assert(dst_as, "Host %s must be in an AS", dst->name());
+
+ /* (2) find the path to the root routing component */
+ for (simgrid::surf::As *current = src_as; current != NULL; current = current->father_) {
+ xbt_assert(index_src < ROUTING_HIERARCHY_MAXDEPTH, "ROUTING_HIERARCHY_MAXDEPTH should be increased for element %s", src->name());
+ path_src[index_src++] = current;
+ }
+ for (simgrid::surf::As *current = dst_as; current != NULL; current = current->father_) {
+ xbt_assert(index_dst < ROUTING_HIERARCHY_MAXDEPTH,"ROUTING_HIERARCHY_MAXDEPTH should be increased for path_dst");
+ path_dst[index_dst++] = current;
+ }
+
+ /* (3) find the common father.
+ * Before that, index_src and index_dst may be different, they both point to NULL in path_src/path_dst
+ * So we move them down simultaneously as long as they point to the same content.
+ */
+ do {
+ current_src = path_src[--index_src];
+ current_dst = path_dst[--index_dst];
+ } while (index_src > 0 && index_dst > 0 && current_src == current_dst);
+
+ /* (4) if we did not find a difference (index_src or index_dst went to 0), both elements are in the same AS */
+ if (current_src == current_dst)
+ father = current_src;
+ else // we found a difference
+ father = path_src[index_src + 1];
+
+ /* (5) result generation */
+ *common_ancestor = father; /* the common father of src and dst */
+ *src_ancestor = current_src; /* the first different father of src */
+ *dst_ancestor = current_dst; /* the first different father of dst */
+ #undef ROUTING_HIERARCHY_MAXDEPTH
+ }
+
+
xbt_dynar_t As::getOneLinkRoutes() {
return NULL;
}
int As::addComponent(NetCard *elm) {
- XBT_DEBUG("Load component \"%s\"", elm->name());
xbt_dynar_push_as(vertices_, NetCard*, elm);
return xbt_dynar_length(vertices_)-1;
}
xbt_die("AS %s does not accept new routes (wrong class).",name_);
}
+ /* PRECONDITION: this is the common ancestor of src and dst */
std::vector<Link*> *As::getBypassRoute(NetCard *src, NetCard *dst)
{
// If never set a bypass route return NULL without any further computations
current_routing = current_routing->father_;
}
-/**
- * \brief Get the AS father and the first elements of the chain
- *
- * \param src the source host name
- * \param dst the destination host name
- *
- * Get the common father of the to processing units, and the first different
- * father in the chain
- */
-static void elements_father(sg_netcard_t src, sg_netcard_t dst,
- AS_t * res_father, AS_t * res_src, AS_t * res_dst)
-{
- xbt_assert(src && dst, "bad parameters for \"elements_father\" method");
-#define ROUTING_HIERARCHY_MAXDEPTH 16 /* increase if it is not enough */
- simgrid::surf::As *path_src[ROUTING_HIERARCHY_MAXDEPTH];
- simgrid::surf::As *path_dst[ROUTING_HIERARCHY_MAXDEPTH];
- int index_src = 0;
- int index_dst = 0;
- simgrid::surf::As *current_src;
- simgrid::surf::As *current_dst;
- simgrid::surf::As *father;
-
- /* (1) find the path to root of src and dst*/
- simgrid::surf::As *src_as = src->containingAS();
- simgrid::surf::As *dst_as = dst->containingAS();
-
- xbt_assert(src_as, "Host %s must be in an AS", src->name());
- xbt_assert(dst_as, "Host %s must be in an AS", dst->name());
-
- /* (2) find the path to the root routing component */
- for (simgrid::surf::As *current = src_as; current != NULL; current = current->father_) {
- if (index_src >= ROUTING_HIERARCHY_MAXDEPTH)
- xbt_die("ROUTING_HIERARCHY_MAXDEPTH should be increased for element %s", src->name());
- path_src[index_src++] = current;
- }
- for (simgrid::surf::As *current = dst_as; current != NULL; current = current->father_) {
- if (index_dst >= ROUTING_HIERARCHY_MAXDEPTH)
- xbt_die("ROUTING_HIERARCHY_MAXDEPTH should be increased for path_dst");
- path_dst[index_dst++] = current;
- }
-
- /* (3) find the common father */
- do {
- current_src = path_src[--index_src];
- current_dst = path_dst[--index_dst];
- } while (index_src > 0 && index_dst > 0 && current_src == current_dst);
-
- /* (4) they are not in the same routing component, make the path */
- if (current_src == current_dst)
- father = current_src;
- else
- father = path_src[index_src + 1];
-
- /* (5) result generation */
- *res_father = father; /* first the common father of src and dst */
- *res_src = current_src; /* second the first different father of src */
- *res_dst = current_dst; /* three the first different father of dst */
-
-#undef ROUTING_HIERARCHY_MAXDEPTH
-}
+namespace simgrid {
+namespace surf {
/**
- * \brief Recursive function for get_route_and_latency
+ * \brief Recursive function for getRouteAndLatency
*
- * \param src the source host name
- * \param dst the destination host name
- * \param *route the route where the links are stored. It is either NULL or a ready to use dynar
- * \param *latency the latency, if needed
+ * \param src the source host
+ * \param dst the destination host
+ * \param links Where to store the links and the gw information
+ * \param latency If not NULL, the latency of all links will be added in it
*/
-static void _get_route_and_latency(simgrid::surf::NetCard *src, simgrid::surf::NetCard *dst,
- std::vector<Link*> * links, double *latency)
+void As::getRouteRecursive(NetCard *src, NetCard *dst,
+ /* OUT */ std::vector<Link*> * links, double *latency)
{
- s_sg_platf_route_cbarg_t route = SG_PLATF_ROUTE_INITIALIZER;
+ s_sg_platf_route_cbarg_t route;
memset(&route,0,sizeof(route));
- xbt_assert(src && dst, "bad parameters for \"_get_route_latency\" method");
- XBT_DEBUG("Solve route/latency \"%s\" to \"%s\"", src->name(), dst->name());
+ XBT_DEBUG("Solve route/latency \"%s\" to \"%s\"", src->name(), dst->name());
/* Find how src and dst are interconnected */
- simgrid::surf::As *common_father, *src_father, *dst_father;
- elements_father(src, dst, &common_father, &src_father, &dst_father);
- XBT_DEBUG("elements_father: common father '%s' src_father '%s' dst_father '%s'",
- common_father->name_, src_father->name_, dst_father->name_);
+ simgrid::surf::As *common_ancestor, *src_ancestor, *dst_ancestor;
+ find_common_ancestors(src, dst, &common_ancestor, &src_ancestor, &dst_ancestor);
+ XBT_DEBUG("elements_father: common ancestor '%s' src ancestor '%s' dst ancestor '%s'",
+ common_ancestor->name_, src_ancestor->name_, dst_ancestor->name_);
/* Check whether a direct bypass is defined. If so, use it and bail out */
- std::vector<Link*> *bypassed_route = common_father->getBypassRoute(src, dst);
+ std::vector<Link*> *bypassed_route = common_ancestor->getBypassRoute(src, dst);
if (nullptr != bypassed_route) {
for (Link *link : *bypassed_route) {
links->push_back(link);
}
/* If src and dst are in the same AS, life is good */
- if (src_father == dst_father) { /* SURF_ROUTING_BASE */
+ if (src_ancestor == dst_ancestor) { /* SURF_ROUTING_BASE */
route.link_list = links;
- common_father->getRouteAndLatency(src, dst, &route, latency);
+ common_ancestor->getRouteAndLatency(src, dst, &route, latency);
return;
}
route.link_list = new std::vector<Link*>();
- common_father->getRouteAndLatency(src_father->netcard_, dst_father->netcard_, &route, latency);
+ common_ancestor->getRouteAndLatency(src_ancestor->netcard_, dst_ancestor->netcard_, &route, latency);
xbt_assert((route.gw_src != NULL) && (route.gw_dst != NULL),
"bad gateways for route from \"%s\" to \"%s\"", src->name(), dst->name());
/* If source gateway is not our source, we have to recursively find our way up to this point */
if (src != route.gw_src)
- _get_route_and_latency(src, route.gw_src, links, latency);
+ getRouteRecursive(src, route.gw_src, links, latency);
for (auto link: *route.link_list)
links->push_back(link);
/* If dest gateway is not our destination, we have to recursively find our way from this point */
if (route.gw_dst != dst)
- _get_route_and_latency(route.gw_dst, dst, links, latency);
+ getRouteRecursive(route.gw_dst, dst, links, latency);
}
-namespace simgrid {
-namespace surf {
-
/**
* \brief Find a route between hosts
*
{
XBT_DEBUG("getRouteAndLatency from %s to %s", src->name(), dst->name());
- _get_route_and_latency(src, dst, route, latency);
+ As::getRouteRecursive(src, dst, route, latency);
}
static xbt_dynar_t _recursiveGetOneLinkRoutes(As *rc)
