--- /dev/null
+/* Copyright (c) 2014-2016. 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. */
+
+#ifndef SURF_ROUTING_CLUSTER_DRAGONFLY_HPP_
+#define SURF_ROUTING_CLUSTER_DRAGONFLY_HPP_
+
+#include "src/kernel/routing/AsCluster.hpp"
+
+namespace simgrid {
+ namespace routing {
+
+
+class XBT_PRIVATE DragonflyRouter {
+ public:
+ unsigned int group_;
+ unsigned int chassis_;
+ unsigned int blade_;
+ surf::Link** blueLinks_=nullptr;
+ surf::Link** blackLinks_=nullptr;
+ surf::Link** greenLinks_=nullptr;
+ surf::Link** myNodes_=nullptr;
+ DragonflyRouter(int i, int j, int k);
+ ~DragonflyRouter();
+};
+
+
+/**
+ * \class AsClusterDragonfly
+ *
+ * \brief Dragonfly representation and routing.
+ *
+ * Generate dragonfly according to the topology asked for, according to:
+ * Cray Cascade: a Scalable HPC System based on a Dragonfly Network
+ * Greg Faanes, Abdulla Bataineh, Duncan Roweth, Tom Court, Edwin Froese,
+ * Bob Alverson, Tim Johnson, Joe Kopnick, Mike Higgins and James Reinhard
+ * Cray Inc, Chippewa Falls, Wisconsin, USA
+ * or http://www.cray.com/sites/default/files/resources/CrayXCNetwork.pdf
+ *
+ * We use the same denomination for the different levels, with a Green,
+ * Black and Blue color scheme for the three different levels.
+ *
+ * Description of the topology has to be given with a string of type :
+ * "3,4;4,3;5,1;2"
+ *
+ * Last part : "2" : 2 nodes per blade
+ * Third part : "5,1" : five blades/routers per chassis, with one link between each (green network)
+ * Second part : "4,3" = four chassis per group, with three links between each nth router of each chassis (black network)
+ * First part : "3,4" = three electrical groups, linked in an alltoall
+ * pattern by 4 links each (blue network)
+ *
+ * LIMITATIONS (for now):
+ * - Routing is only static and uses minimal routes.
+ * - When n links are used between two routers/groups, we consider only one link with n times the bandwidth (needs to be validated on a real system)
+ * - All links have the same characteristics for now
+ * - Blue links are all attached to routers in the chassis n°0. This limits
+ * the number of groups possible to the number of blades in a chassis. This
+ * is also not realistic, as blue level can use more links than a single
+ * Aries can handle, thus it should use several routers.
+ */
+class XBT_PRIVATE AsClusterDragonfly
+ : public AsCluster {
+ public:
+ explicit AsClusterDragonfly(const char*name);
+ ~AsClusterDragonfly() override;
+// void create_links_for_node(sg_platf_cluster_cbarg_t cluster, int id, int rank, int position) override;
+ void getRouteAndLatency(NetCard * src, NetCard * dst, sg_platf_route_cbarg_t into, double *latency) override;
+ void parse_specific_arguments(sg_platf_cluster_cbarg_t cluster) override;
+ void seal() override;
+ void generateRouters();
+ void generateLinks();
+ void createLink(char* id, int numlinks, Link** linkup, Link** linkdown);
+ unsigned int * rankId_to_coords(int rankId);
+ private:
+ sg_platf_cluster_cbarg_t cluster_;
+ unsigned int numNodesPerBlade_ = 0;
+ unsigned int numBladesPerChassis_ = 0;
+ unsigned int numChassisPerGroup_ = 0;
+ unsigned int numGroups_ = 0;
+ unsigned int numLinksGreen_ = 0;
+ unsigned int numLinksBlack_ = 0;
+ unsigned int numLinksBlue_ = 0;
+ unsigned int numLinksperLink_ = 1; //fullduplex -> 2, only for local link
+ DragonflyRouter** routers_=nullptr;
+ };
+
+ }}
+#endif
